REFERENCE GUIDELINES FOR CALCULATING
PERFORMANCE INDEXES
&
DATA REPORTING
INSTRUCTIONS
TABLE OF CONTENTS
·
DEFINITIONS
1. Outages
2.
De-ratings
3.
Reserve Shutdown - RS
4. Non-Curtailing Event – NC
5.
Event Transitions
6.
Unit Generation performance
·
TIME PERIOD CALCULATIONS FOR OUTAGES
& CAPACITY DERATING
· PERFORMANCE INDEXES AND EQUATIONS
INSTRUCTIONS FOR GENERATING UNIT EVENT REPORTING
·
DEFINITIONS
1. Outages
An outage exists whenever a unit is
not synchronized to the grid system and not in a
Reserve Shutdown state.
An outage starts when the unit is
either desynchronized from the grid or when it moves
from one
unit state to another .The outage
ends when the unit is synchronized
to the grid or moves to another unit state whose allowed
transfer applicability is shown in table no1.
In the case of moving from one unit state to another, the exact date and time that one outage ends will be the same as
the next outage starts. Whenever two statuses overlap, for example, forced
outage (U1) & planed outage (PO) the maximum time period counted for (U1)
168 hours or less, till the unit, enters in (PO) state. in case (U1) happens and
(PO) dose does not appear within the maximum allowed period of 168 hours unit state will
enter maintenance outage (MO) until unit receives a(PO).
It is agreed that, in
case A unit is forced outage(U1) , before the commencement of planned outage
(PO) , which is just due to commence by a period shorter than, one day, the time period in question will be counted as (PO).
The general outage event
classification is divided into seven distinct event types.
PO - Planned Outage
An outage that is scheduled well in
advance and is of a predetermined duration, lasts for several weeks and occurs only once or
twice a year.
It is agreed that a planned outage can be all types of scheduled
maintenance such as all inspection (major and minor), including repair job
& permanent modification normally planed during annual maintenance programs.
MO - Maintenance
Outage
An outage that can be deferred beyond
the end of the next
weekend, but requires that the unit
be removed from service,
another outage state, or Reserve Shutdown state before the next Planned Outage
(PO). Characteristically, a MO can
occur any time during the year, has a flexible start date, may or may not have
a predetermined duration,
and is usually much shorter than a PO.
SE - Scheduled Outage Extension
scheduled outage extension is an extension of a Planned Outage (PO) or a
Maintenance Outage (MO) beyond its estimated completion date.
scheduled outage extension (SE) can
take place when extra time is required to complete the essential scope of work .
If any unexpected jobs
come to surface during scheduled outage (MO ,PO) , then record
the unit state as forced outage(U1) and
its maximum limit (168)hours .
Start of (SE) and (U1) must be recorded precisely mentioning month/ day / hour /minute from the
termination of MO,PO.
SF - Startup Failure
An outage that results when a unit
is unable to synchronize within a specified startup time following an outage or
Reserve Shutdown.
SF begins when the problem preventing the unit
from synchronizing occurs. The SF
ends when the unit is synchronized, another SF occurs, or the unit
enters another permissible state.
Note :
The
startup period for each unit is determined by the operating utility. It is unique for each unit, and depends on the condition
of the
unit at the time of startup (hot, cold, standby,
etc.). A startup period begins with
the command to start and ends when the unit is synchronized
U1 - Unplanned (Forced) Outage — Immediate
An outage that requires immediate
removal of a unit from service, another Outage State, or a Reserve
Shutdown state. This type of outage usually results from immediate mechanical/electrical/hydraulic control
systems trips and operator-initiated trips in
response to unit alarms.
It is agreed that (U1) will be allocated for a unit requiring immediate removal from service or the following unit states : (PO, MO, SE,SF U1 ,U2, U3 & RS).
U2 - Unplanned (Forced) Outage — Delayed
An outage that does not require
immediate removal of a unit
from the in-service state but
requires removal within six hours. This
type of outage can only occur while the unit
is in service.
U3 - Unplanned
(Forced) Outage — Postponed
An outage that
can be postponed beyond six hours
but requires that a unit be removed from the in-service state before the
end of the next weekend. This type of outage can only occur while the unit is in service.
Notes
on Reporting Outages
Typically following outages, equipment that was repaired or replaced is
tested. These testing periods must
be reported. The reporting procedure to follow depends on whether or not the unit was
synchronized during the
testing period:
a. On-line
testing (synchronized)
If the unit must be on line and
in service at some reduced load to perform testing following a Planned Outage (PO),
Maintenance Outage (MO), or Unplanned (Forced) Outage (U1, U2, U3, SF), report the
testing as a Planned Derating (PD), Maintenance Derating (D4), or Unplanned
(Forced) Derating (D1), respectively. The PD, D4, or D1 starts when the testing
begins, and ends when testing
is completed. Report any generation
produced while the unit was on line during the testing period on the Performance
Report.
b. Off-line testing (not synchronized)
In cases where the unit does not have to be synchronized after the outage to perform testing, you can report the testing as part of the outage event .
The outage ends when the testing is completed and the unit is placed in service or enters another state.
2. Deratings
A derating exists whenever a unit is limited to some power level less than the unit’s Net Maximum Capacity.
Report all deratings that are
greater than (2%) of the unit’s
Net Maximum Capacity and longer than
30 minutes in duration. Do not report
deratings caused by ambient-related conditions or system dispatch requirements.
It is agreed that deratings must be
calculated & reported if it is greater than (8%) of the unit’s Net Maximum Capacity and longer
than (30 minutes) in duration where
as gas turbine is being operated on crude oil .
Derating events are classified into 6 distinct types as follows:
PD - Planned
Derating
A derating that is scheduled well
in advance
and is of a predetermined duration or to perform testing following a Planned Outage (PO).
D4 - Maintenance Derating
A
derating that can be deferred beyond the end of the next
weekend but requires a reduction in capacity before the next Planned Outage (PO) or
to perform testing within a maintenance outage (MO). A D4 can have a flexible
start date and may or may not
have a predetermined duration.
DE - Derating
Extension
An
extension of a Planned Derating (PD) or
a Maintenance Derating (D4) beyond
its estimated completion date.
Use a DE only in instances where the original scope of work requires more time to complete
than originally scheduled. If unexpected
problems, or delays outside
the scope of work are encountered which render the unit incapable of full load beyond
the estimated end date of the PD or
D4 , allocate D1 instead of DE . The DE must start at the same time
(month/day/hour/minute) that the PD or D4 ended.
D1 - Unplanned (Forced) Derating — Immediate
A derating that requires an
immediate reduction in capacity.
D2 - Unplanned (Forced) Derating — Delayed
A
derating that does not require an
immediate reduction in capacity but requires
a reduction within six hours.
D3 - Unplanned (Forced) Derating — Postponed
A derating that can be postponed beyond six hours but requires a reduction in capacity before the end of the next weekend.
Notes on Reporting Deratings
Ambient-related
Losses
Do not report ambient-related losses,. There are two reasons for this.
First, the level of
record keeping required to track these types of losses as events is excessive.
Second, ambient-related losses are easily computed using the Performance formula for energy generated losse; and that is
simply multiply the difference between Maximum
Capacity and Dependable Capacity by
total number of hours during the period
under study.
System Dispatch Requirements
Sometimes units operate at less than full capacity for reasons other
than ambient-related conditions or
any auxiliary equipment failures. This operating mode ,which is imposed
by system dispatch requirements , is referred to
as “Load Following”.
-
Load Following not reported as a de-rating event.
-
But incase any maintenance work or testing is carried
out under the certain conditions during the Loading Following period, the work
or testing should be recorded as Non-Curtailing(NC) event as explained latter .
Each
unit has a “standard”
or “normal” time for
reaching full load capabilities after a full outage or ramping down
(coming off line) to a full outage state.
the operators know the units and can judge if a unit is taking longer than normal to ramp
up after an outage or coast down for removal from service.
If
a unit ramps up to the full
load level OR up to the level of required
load within the “normal”
time period — set by the operators
of the unit — following a full
outage, there is no derating on the unit from the time
of synchronization to the load point.
If the unit takes longer than normal ramp up time to the
full load level OR up to the required load,
then there is a derating. The
generating capacity of the unit at the end of the normal period will be the level of the derate and
the derate will last until the unit can
either reach full load capability or level of
required load.
There is no derating for unit shutdown. Each unit must be shutdown
safely, with damaging equipment or posing a safety hazard to personnel. Some
shutdowns are quick as in a unit trip; others are slower such as coast down to unit planned outages. In either case, the unit is not derated.
3. Reserve Shutdown - RS
An event that exists whenever a unit is available
for load but is not synchronized
due to lack of demand.
This type of event is sometimes referred to as an economy outage or economy shutdown.
If a unit is shut down due to any equipment-related
problems, whether or not the
unit was needed by the system, report an Unplanned (Forced) Outage,
Maintenance Outage, or Planned
Outage, not a Reserve Shutdown.
While a
unit is on RS, maintenance
work is often performed that would have resulted in a unit outage or de rating
had the unit been on line. This work can be reported as part of the RS event if, at anytime, the work can be stopped or completed
without preventing the unit
from:
a) synchronizing after a normal startup cycle; and,
b) reaching its available capacity
after a normal loading cycle.
This criterion remains
the same whether or not the unit was needed by the system.
If maintenance work cannot be stopped or completed the Reserve Shutdown condition of the unit is altered and an outage or derating must be reported. If the unit cannot be synchronized while the work is being performed, an outage exists and the RS must end. If the unit cannot reach at its available capacity while the work is being performed, a derating exists. The RS event does not end, but report the derating too. Estimate the available capacity as a result of the derating.
4. Noncurtailing Event - NC
An event that exists whenever equipment or a major component is removed from service for maintenance, testing, or other purposes that does not result in a unit outage or derating.
a) The available capacity of the unit is not reduced below that required by system dispatch;
and,
If the above conditions (a,b) cannot be met, report an outage or derating event rather than an NC.
5. Event
Transitions
Sometimes events occur in
succession with no intervening unit synchronization.
These events are considered “related,” even though they must be reported separately. The matrix below describes the relationships between events and details permissible event type changes.
Allowable Event Type Changes
|
FROM |
U1 |
U2 |
U3 |
SF |
MO |
PO |
SE |
RS |
DE |
|
U1- Immediate |
Yes |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
|
|
U2- Delayed |
Yes |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
|
|
U3 – Postponed |
Yes |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
|
|
SF – Startup Failure |
Yes |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
|
|
MO - Maintenance |
Yes |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
|
|
PO - Planned |
Yes |
No |
No |
Yes |
No |
Yes |
Yes |
Yes |
|
|
SE – Extension |
Yes |
No |
No |
Yes |
No |
No |
Yes |
Yes |
|
|
RS–Reserve Shutdown |
Yes |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
|
|
D1- Immediate |
|
No |
|||||||
|
D2- Delayed |
No |
||||||||
|
D3 – Postponed |
No |
||||||||
|
D4 - Maintenance |
Yes |
||||||||
|
PD - Planned |
Yes |
||||||||
|
DE – Extension |
Yes |
||||||||
“YES” denotes that a change from one event type to another without intervening synchronization
is permissible and the end date of
the first event can be the same as the start date of the successive event.
“NO” indicates that there is no relationship between the event types and individual
events separated by some period of time must be reported.
When there is no intervening synchronization between events, the start time of one event is the
same as the end time of the immediately preceding event.
6. UNIT GENERATION PERFORMANCE
Gross Maximum Capacity
(GMC)
It is the maximum capacity the unit can sustain over a specified period of time when not
restricted by ambient conditions or deratings.
The GMC of a unit should change only
as
a result of a new performance test
or permanent unit modification. GMC is never changed due to equipment problems, even
if some of them persist
for a lengthy period of time unless permanent modification is
carried out.
It is agreed that gross maximum
capacity (GMC) will be that capacity of a unit as prescribed by (International
Standard Organization ISO) at 15 C, at sea level and relative humidity at 60%.
Gross Dependable Capacity
(GDC)
It is the gross power
level that the unit can
sustain during a given period if there are no restrictions
on equipment for its
operation, or regulatory restrictions.
By definition, therefore, the GDC is the GMC modified for ambient limitations.
Gross Actual Generation (GAG)
GAG is the actual number of gross electrical megawatthours (MWh) generated by the unit during a given
period.
Gross
available capacity (GAC)
GAC is the greatest capacity at
which the unit can
operate during the period of restriction caused by the derating.
Total Actual Capacity (TAC)
TAC is the maximum
total capacity for a generating unit, calculated at 50 C compressor inlet air
temperature .
“It is agreed that Total Actual Capacity calculations will
be carried out at 50 C Ambient”.
Net Maximum Capacity
(NMC)
NMC is the unit’s GMC,
less any capacity (MW) utilized for
that unit’s station service or
auxiliary load.
Net Dependable Capacity (NDC)
NDC is the unit’s GDC,
less any capacity (MW) utilized for
that unit’s station service or
auxiliary loads.
Net Actual Generation (NAG)
NAG is the unit’s Gross Actual Generation (GAG) less any generation (MWH) utilized
for that unit’s station service or auxiliary loads.
Net Available Capacity (NAC)
NAC is the Gross available capacity) GAC( less any capacity utilized for station service or auxiliary loads.
· Calculations of outage time de-rating capacity
Service Hours ) SH )
Sum
of all Unit Service Hours.
Available Hours
( AH )
sum of the Unit Service
Hours (SH), Reserve Shutdown Hours(RS), Pumping Hours (if applicable), and Synchronous Condensing Hours (if applicable).
AH= SH+RSH+(PUMPING HOUR ) +( SYNCRONOUS CONDENSING)
NOTE : PUMPING
HOUR ARE ONLY APLICABEL FOR HYDRO ELICTRIC POWER UNIT
.
Planned Outage Hours ( POH )
Sum of all hours experienced
during Planned Outages (PO) + Scheduled Outage Extensions
(SE) of any Planned
Outages (PO).
POH= PO + (SE of PO)
Unplanned Outage Hours ( UOH )
Sum of all
hours experienced during Unplanned
(Forced) Outages (U1, U2, U3) + Startup Failures (SF) + Maintenance Outages (MO) + Scheduled
Outage Extensions (SE) of any Maintenance Outages (MO).
UOH = (U1+U2+U3) + SF + MO + ( SE of MO)
Unplanned (Forced) Outage Hours ( FOH )
Sum of all hours experienced
during Unplanned (Forced) Outages (U1, U2, U3) +
Startup Failures (SF).
FOH= (U1+U2+U3) + SF
Maintenance Outage Hours ( MOH )
Sum
of all hours experienced during Maintenance Outages (MO) + Scheduled
Outage Extensions (SE) of any Maintenance Outages(MO).
MOH = MO + ( SE of MO)
Unavailable Hours
(UH)
Sum of all Planned Outage Hours
(POH) + Unplanned (Forced) Outage Hours (FOH) + Maintenance Outage Hours (MOH).
UH = POH + FOH + MOH
Scheduled Outage Hours – SOH
Sum of all hours experienced during Planned Outages (PO)
+ Maintenance Outages (MO) +Scheduled
Outage Extensions (SE) of any Maintenance Outages (MO) and Planned Outages (PO).
SOH
= PO+ (SE of PO) + MO + (SE of MO)
Period Hours (PH)
Number
of hours in the period being reported that the unit was in the active state.
Equivalent
Seasonal Derated Hours - ESEDH
Net Maximum Capacity (NMC) - Net Dependable Capacity (NDC) x Available Hours (AH) / Net
Maximum Capacity (NMC).
(NMC --- NDC) x AH
NMC
Equivalent Unplanned (Forced) Derated Hours – EFDH (D1, D2, D3)
Each individual Unplanned (Forced) Derating (D1, D2, D3) is transformed into equivalent full outage hour(s). This is calculated by multiplying the actual duration of the derating (hours) by the size of the reduction (MW) and dividing by the Net Maximum Capacity (NMC). These equivalent hour(s) are then summed.
Derating Hours x Size of Reduction*
NMC
NOTE: Includes Unplanned (Forced) Deratings (D1, D2, D3) during Reserve Shutdowns (RS).
Equivalent Planned Derated Hours – EPDH (PD,
DE)
Each individual Planned Derating (PD,DE) is transformed
into equivalent full outage hour(s). This is calculated by multiplying the actual duration of the
derating (hours) by the size of reduction (MW) and dividing by the Net Maximum
Capacity (NMC). These equivalent hour(s)
are then summed.
Derating Hours x Size
of Reduction*
NMC
NOTE: Includes Planned Deratings (PD) during Reserve
Shutdowns (RS)..
Equivalent Unplanned
Derated Hours – EUDH (D1, D2, D3, D4, DE)
Each individual Unplanned
Derating(D1, D2, D3, D4, DE) is transformed into equivalent full outage
hour(s). This is calculated by multiplying the actual duration of the
derating (hours) by the size of reduction(MW) and dividing by the Net Maximum Capacity (NMC). These equivalent
hour(s) are then summed.
Derating Hours x Size of Reduction*
NMC
NOTE:Incudes Unplanned Deratings (D1, D2, D3, D4,
DE) during Reserve Shutdowns (RS).
Equivalent Unplanned (Forced) Derated Hours During Reserve Shutdowns – EFDHR (D1, D2, D3)
Each individual Unplanned (Forced) Derating (D1, D2, D3) or the portion of
any Unplanned (Forced) derating which occurred during a Reserve Shutdown
(RS) is transformed into equivalent full outage
hour(s). This is calculated by multiplying the actual duration of the
derating (hours) by the size of the reduction (MW) and dividing by the
Net Maximum Capacity (NMC).
These
equivalent hour(s) are then summed.
Derating Hours x Size of Reduction*
NMC
* Size of Reduction is
determined by subtracting the Net Available
Capacity (NAC) from the Net Dependable Capacity (NDC). In cases of multiple
deratings, the Size of Reduction of each derating will be determined by the difference in the Net
Available Capacity of the unit prior to the derating and the reported Net
Available Capacity as a result of the derating
Number of Planned Outages (PO) which occur from in-service state only
A count of the number of all Planned Outages (PO) reported on Event Report
(Since Scheduled Outage Extensions (SE) of
Planned Outages are considered part of the original Planned Outage (PO), they
are not included in this count.)
Number of Unplanned Outages(MO, U1, U2, U3)
which occur from in-service state
only
A count of the number of all Unplanned Outages (U1, U2, U3,
MO) reported in
the Event Report
does not
include Startup Failures (SF) in this count.)
Number of Unplanned (Forced) Outages (U1,
U2, U3), which occur from in-service
state only
A count of the number of all
Unplanned (Forced) Outages (U1, U2, U3) reported on the
Event Report do not include Startup Failures (SF) in this count.
Number of Maintenance Outages (MO), which
occur from in-service state only
A count of the number of all
Maintenance Outages (MO) reported on the Event Report
(Since Scheduled Outage
Extensions (SE) of Maintenance Outages are considered part of the original
Maintenance Outage (MO), they are not included in this count.)
·
PERFORMANCE
INDEXES AND EQUATIONS
1.
Planned Outage Factor – POF
The formula for calculation is, as follows:
|
POF |
= |
Planned Outage Hours |
X |
100 |
|
Period Hours |
2.
Unplanned Outage Factor – UOF
The formula for calculation is, as follows:
|
UOF |
= |
Unplanned Outage Hours |
X |
100 |
|
Period Hours |
3. Forced Outage Factor - FOF
The formula for calculation is, as follows:
FOF |
= |
Unplanned (Forced) Outage Hours |
X |
100 |
|||
|
Period Hours |
4. Maintenance Outage Factor – MOF
The formula for calculation is, as follows:
|
MOF |
= |
Maintenance Outage Hours |
X |
100 |
|
Period Hours |
5. Scheduled Outage Factor –
SOF
The formula for calculation is, as follows:
|
SOF |
= |
Scheduled Outage Hours |
X |
100 |
|
Period Hours |
6. Unavailability Factor – UF
The formula for calculation is, as follows:
|
UF |
= |
Unavailable Hours |
X |
100 |
|
Period Hours |
7. Availability Factor - AF
The formula
for calculation is, as follows:
|
AF |
= |
Available Hours |
X |
100 |
|
Period Hours |
8. Service Factor - SF
The formula
for calculation is, as follows:
|
SF |
= |
Service Hours |
X |
100 |
|
Period Hours |
9.
Seasonal
Derating Factor – SEDF
The formula
for calculation is, as follows:
|
SEDF |
= |
Equivalent Seasonal Derated Hours |
X |
100 |
|
Period Hours |
The formula for calculation
is, as follows:
|
UDF |
= |
Equivalent Planned Derated Hours + Equivalent
Unplanned Derated Hours |
X |
100 |
|
Period Hours |
11. Equivalent Unavailability
Factor - EUF
The formula for calculation is, as follows:
|
EUF |
= |
Planned outage hours+ Unplanned outage hours
+Equivalent Planned Derated Hours + Equivalent
Unplanned Derated Hours |
X |
100 |
|
Period Hours |
12. Equivalent Availability Factor - EAF
The formula for calculation is, as follows:
|
EAF |
= |
Available hours -
Equivalent Planned Derated Hours-
Equivalent Unplanned Derated Hours - Equivalent Seasonal Derated Hours |
X |
100 |
|
Period Hours |
13. Gross Capacity Factor - GCF
The formula for calculation is, as follows:
|
GCF |
= |
Gross actual generation |
X |
100 |
|
Period Hours x gross maximum capacity |
The formula for calculation is, as follows:
|
NCF |
= |
Net actual generation |
X |
100 |
|
Period Hours x Net maximum capacity |
Note: Net capacity factor calculated using this equation can be negative during a period when the unit is shutdown.
The formula for calculation is, as follows:
|
GOF |
= |
Gross actual generation |
X |
100 |
|
Service Hours x gross maximum capacity |
The formula for calculation is, as follows:
|
NOF |
= |
Net actual generation |
X |
100 |
|
Service Hours x Net maximum capacity |
17. Forced Outage Rate - FOR
The formula for calculation is, as follows:
|
FOR |
= |
Unplanned (Forced) Outage Hours |
X |
100 |
|
Unplanned (Forced) Outage Hours + Service Hours |
18. Equivalent Forced Outage Rate
– EFOR
The formula for calculation is, as follows:
|
EFOR |
= |
Unplanned (Forced)
Outage Hours + Equivalent Unplanned (Forced) Derated Hours |
X |
100 |
|
Unplanned (Forced)
Outage Hours + Service Hours+ Equivalent un planed
(Forced) Derated Hours during Reserve Shutdowns (RS)
Only |
19. Average Run Time - ART
The formula for calculation is, as follows:
|
ART |
= |
Service Hours |
X |
100 |
|
Actual Unit Start |
20.
Starting
Reliability – SR
The formula for calculation is, as follows:
|
SR |
= |
Actual Unit Start |
X |
100 |
|
Attempted Unit Start |
Mean
Service Time to Outage:
21a. Mean Service Time to Planned Outage - MSTPO
The formula for calculation is, as follows:
|
MSTPO |
= |
Service Hours |
X |
100 |
|
Number of Planned
Outages (which occur from in-service state only) |
The formula for calculation is, as follows:
|
MSTUO |
= |
Service Hours |
X |
100 |
|
Number of Unplanned Outages (which occur from in-service state only) |
21c. Mean Service Time
to Forced Outage - MSTFO
The formula for calculation is, as follows:
|
MSTFO |
= |
Service Hours |
X |
100 |
|
Number of Unplanned Forced Outages (which occur from in-service state only) |
21d. Mean Service Time
to Maintenance Outage - MSTMO
The formula for calculation is, as follows:
|
MSTMO |
= |
Service Hours |
X |
100 |
|
Number of Maintenance
Outages (which occur from in-service state only) |
Mean Outage Duration:
22a. Mean Planned Outage Duration -
MPOD
The formula for calculation is, as follows:
|
MPOD |
= |
Planned Outage Hours |
X |
100 |
|
Number of Planned
Outages (which occur from in-service state only) |
22b. Mean Unplanned Outage Duration
- MUOD
The formula for calculation is, as follows:
|
MUOD |
= |
Unplanned Outage Hours |
X |
100 |
|
Number of Unplanned
Outages (which occur from in-service state only) |
22c. Mean Forced Outage Duration – MFOD
The formula for calculation is, as follows:
|
MFOD |
= |
Unplanned Forced Outage Hours |
X |
100 |
|
Number of Unplanned Forced
Outages (which occur from in-service state only) |
22d. Mean Maintenance Outage Duration - MMOD
The formula for calculation is, as follows:
|
MMOD |
= |
Maintenance Outage Hours |
X |
100 |
|
Number of Maintenance Outages (which occur from in-service state only) |
INDEXES
FOR OPERATION PLAN
·
INDEXES FOR OPERATION PLAN
1- Availability Factor - AF
|
AF, Weighted @ NMC |
= |
Available Hours |
X |
100 |
|
Period Hours |
2-
Forced Outage Factor - FOF
This must be calculated on quarterly basis during a
year. It is needed to be calculated for Steam ,gas, combined cycle, diesel
engine, generated unit as per following formula;
|
FOF, Weighted @ NMC |
= |
Unplanned Forced Outage Hours |
X |
100 |
|
Period Hours |
3-
Maintenance Outage Factor – MOF
This must be calculated on quarterly basis during a
year. It is needed to be calculated for Steam ,gas, combined cycle, diesel
engine, generated unit as per following formula;
|
MOF Weighted @ NMC |
= |
Maintenance Outage Hours |
X |
100 |
|
Period Hours |
4-
Planned Outage Factor – POF
This must be calculated on quarterly basis during a
year. It is needed to be calculated for Steam ,gas, combined cycle, diesel
engine, generated unit as per following formula;
|
POF Weighted @ NMC |
= |
Planed Outage Hours |
X |
100 |
|
Period Hours |
5- Gross capacity Factor -GCF
This must be calculated on quarterly basis during a
year. It is needed to be calculated for Steam , gas, combined cycle, diesel engine,
generated unit as per following formula;
|
GCF |
= |
Gross Actual Generation |
X |
100 |
|
Period Hours x Gross Maximum Capacity |
6- Gross Output Factor - GOF
This must be calculated on quarterly basis during a
year. It is needed to be calculated for Steam , gas, combined cycle, diesel
engine, generated unit as per following formula;
|
= |
Gross Actual
Generation |
X |
100 |
|
|
Service
Hours x Gross Maximum Capacity |
7- Reserved Capacity Factor -RCF
This must be calculated on quarterly basis during a
year. It is needed to be calculated for all units (MWH) generated by, steam,
gas, combined cycle, or diesel engine generating systems, as per following
formula;
|
RCF |
= |
TAC @ 50 c - Import –System peak load |
X |
100 |
|
System peak load |
8-
Gross Heat Rate- GHR
This must be calculated on quarterly basis during a
year. It is needed to be calculated for steam, gas, combined cycle, diesel
engine, generating systems as per following formula;
|
GHR |
= |
(Fuel Consumed x Fuel Heating Value x Fuel SP.
Gravity) + (Gas Consumed x Gas Heating Value x 1000) |
X |
100 |
|
Gross Actual Generation |
·
Liquid fuel consumption is calculated in
Cubic Meters M3 .
·
Gas consumption is calculated in Million
Standard Cubic Foot (MMSCF).
·
Fuel oil heating value: calculate it by (BTU)/KG i.e. British Thermal Units per
Kilogram
·
Gas heating value: calculate it by BTU/SCF
i.e. British Thermal Units per Standard Cubic Foot.
INSTRUCTIONS FOR
GENERATING UNIT EVENT REPORTING
Planned Outage – PO
CASE NO.1. If Operation & Maintenance Division request to
shift, earlier, “an agreed planned outage period”; on a given unit:
The (PO) period advancement would be carried
out as (PO) with the agreement of power
plant, who can (before the commencement of unit planned outage), demand the
same time period or different than what was previously assigned.
CASE NO.2. If Operation &
Maintenance Division request the deferment, of, “an agreed planned outage
period”; on a given unit:
The (PO) period deferment would
be carried out as (PO) with the
agreement of power plant, who can (before the commencement of unit planned
outage), demand the same time period or different than what was previously
assigned.
CASE NO.3. If Operation &
Maintenance Division request the advancement or deferment, of, “an agreed
planned outage period”; on a given unit, and an extension in time period took
place, without changing the scope of
work :
The (PO) period advancement
or deferment would be carried out as
(PO), with the agreement of power plant, who can (before the
commencement of unit planned outage), demand the same time period or different
than what was previously assigned but if the job could not be completed on time
then the unit will be entered into Scheduled Extension of Planned Outage (SE of
PO) state till the completion of job.
CASE NO.4. If Operation &
Maintenance Division request the advancement or deferment, of, “an agreed
planned outage period”; on a given unit, and an extension in time period took
place along with a change in scope of work :
The (PO) period advancement
or deferment would be carried out as
(PO) with the agreement of power plant, who can (before the commencement
of unit planned outage), demand the same time period or different than what was
previously assigned but change in scope of work, delayed completion of job,
then the unit will enter into forced outage immediate (U1), for a maximum
period of 168 hours.
CASE NO.5. If a power plant requests
to shift, “an approved planned outage time period” to an earlier date and
Operation & Maintenance Division agrees:
The (PO) period advancement would be carried
out as (PO), for the same (previously) decided duration and power plant has no
right to request a different duration than what was allocated in the original
plan.
CASE NO. 6.
If a power
plant requests to defer, “an approved planned outage time period” to a later
date and Operation & Maintenance Division agrees:
The (PO) period deferment
would be carried out as (PO), for the
same (previously) decided duration and power plant has no right to request a
different duration than what was allocated in the original plan.
CASE NO.7. If a power plant requests
the advancement or deferment, of, “an agreed planned outage period”; on a given
unit and Operation & Maintenance Division approves and later on an
extension in time period takes place without changing the scope of work:
The (PO) period advancement
or deferment would be carried out as
(PO), for the time period as was
previously assigned but if the job could not be completed on time then
the unit will be entered Scheduled Extension of Planned Outage (SE of PO) state
till the completion of job.
CASE NO.8: If power plant requests the
advancement or deferment, of, “an agreed planned outage period”; on a given
unit and Operation & Maintenance Division approves and later on an
extension in time period takes place along with a change in scope of work:
The (PO) period advancement
or deferment would be carried out as
(PO), for the time period as was
previously assigned but change in scope of work delayed the completion of job,
then for the remaining period ,the unit will enter into forced outage immediate
(U1), for a maximum period of 168 hours.
CASE NO.9: Without the approval of
Operation & Maintenance Division:
If a power plant shifts, “an agreed planned outage
time period” to an earlier date producing
a gap,
between new start date and original planned start date longer in duration than
original PO period.
Provided that:
1) Job
duration (new) is maintained equal to original PO period
2)
The job completion date (new) falls before the predetermined planned start
date.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, then unit will
enter into Maintenance Outage (MO) state till the completion of job and there
was no extension in the predetermined planned period.
Hence both periods U1 & MO, equal to scheduled
PO period.
CASE NO.10: Without the approval of
Operation & Maintenance Division:
If power plant shifts, “an agreed planned outage
time period” to an earlier date producing a gap between new start date and
original planned start date, lesser in duration than original PO period but
greater than a week,
Provided that:
1) Job
duration (new) is maintained equal to
original PO period
2) The job completion date (new) falls after the predetermined
planned start date
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, then unit will
enter into Maintenance Outage (MO) state for a duration till the predetermined
planned start date and it will remain in PO till completion of planned job.
Hence all periods, U1, MO & remaining PO
equal to original scheduled PO.
CASE NO.11: Without the approval of
Operation & Maintenance Division:
If a power
plant shifts an agreed planned outage
time period” to an earlier date producing a gap between
new start date and original planned start date lesser in duration than a week.
Provided that:
1) Job duration (new) is maintained equal to original PO period
2) The job completion date (new)
falls after the predetermined planned start date.
Resolution: The unit will
be considered in forced outage (immediate) U1 till the commencement of start date of Planned Outage
(PO). Hence both
periods U1and remaining PO will be equal to original scheduled PO period.
CASE NO.12: Without the approval of
Operation & Maintenance Division:
If a power plant shifts, “an agreed planned
outage time period” to an earlier date producing
a
gap between new start date and original planned start date, longer in duration
than original PO period. Additionally an
extension in time period also takes place without changing the scope of work:
Provided that:
1) Job duration (new) is
greater than original PO period.
2) The job completion date (new) may fall
after the predetermined planned start date.
Resolution:
The unit will be considered in forced outage (immediate) U1 for a period of 168
hours then unit will enter into Maintenance Outage (MO) state, and if job is
not completed within predetermine PO period the rest of the job period will be
considered as SE of MO.
Hence periods U1& MO, will be equal to original scheduled PO period.
CASE NO.13: Without the approval of
Operation & Maintenance Division :
If power plant shifts, “an
agreed planned outage time period” to an earlier date producing a gap between
new start date and original planned start date lesser in duration than original
PO period but greater than a week,. Additionally, an extension in time period
also takes place without changing the scope of work:
Provided
that:
1) Job duration (new) is greater than original PO period
2) The job completion date (new)
falls after the predetermined planned start date
Resolution: The unit will be considered in
forced outage (immediate) U1 for a period of 168 hours, then unit will enter
into Maintenance Outage (MO) state until the predetermined planned start date
commences. Further it will enter into PO. And if job not finished during
predetermined planned period then the unit will be considered in SE of PO.
Hence periods, U1, MO & remaining PO equal to original scheduled PO period.
CASE NO.14: Without the approval of
Operation & Maintenance Division :
If power plant shifts, “an
agreed planned outage time period” to an earlier date producing a gap between
new start date and original planned start date lesser in duration by one week,.
Additionally, an extension in time period also takes place without changing the
scope of work:
Provided
that:
1) Job duration(new) is
greater than original PO period
2) The job completion date (new)
falls after the predetermined planned start date
Resolution: The unit will be considered in
forced outage (immediate) U1 for a period up to the start of original scheduled
PO date, then unit will enter into Planned Outage (PO) from the start of PO
period, till the end of the predetermined planned period then if job is not
completed requiring more time, the unit will be considered in SE of PO.
Hence periods, U1& remaining PO equal to
original scheduled PO period.
CASE
NO.15: Without the approval of Operation & Maintenance Division :
If power plant shifts, “an
agreed planned outage time period” to an earlier date producing a gap, between
new start date and original planned start date longer in duration than original
PO period. Additionally, an extension in time period also takes place along
with changing the scope of work.
Provided that:
1) Job duration(new) is greater than original PO period
2) The job completion date (new)
falls after the predetermined planned start date
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, then unit will
enter into Maintenance Outage (MO), in such a way that U1 +MO periods equal to predetermined
planned period. If job is not completed requiring more time due to unforeseen
scope of work, unit will be considered in second U1 for another maximum period
of 168hours. If still job completion requires more time another MO will be
allocated.
Hence sum of
periods, first U1& and first MO, equal to predetermined planned period.
CASE NO.16: Without the approval of Operation & Maintenance Division :
If a power plant shifts,
“an agreed planned outage time period” to an earlier date producing a
gap between new start date and original planned start date lesser in duration
than original PO period but greater than a week, Additionally, an extension in
time period also takes place along with a change in the scope of work.
Provided
that:
1) Job duration (new) is greater than original PO period
2) The job completion date (new)
falls after the predetermined planned start date
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, then unit will
enter into Maintenance Outage (MO) state until the predetermined planned start
date commences. Further it will enter into PO in such a way that U1 +MO +(
remaining PO periods), equal to predetermined planned period. If job is not
completed requiring more time due to unforeseen scope of work, unit will be
considered in second U1 for another maximum period of 168hours. Further, if
still job completion requires more time, unit will enter into MO.
CASE NO.17: Without the approval of
Operation & Maintenance Division :
If a power plant shifts,
“an agreed planned outage time period” to an earlier date producing a gap,
between new start date and original planned start date lesser in duration than
a week. Additionally, an extension in time period also takes place along with a
change in the scope of work.
Provided that:
1) Job duration (new) is greater than original PO period
2) The job completion date (new)
falls after the predetermined planned start date
Resolution: The unit will be considered in
forced outage (immediate) U1 for a period up to the start of original scheduled
PO date, then unit will enter into Planned Outage (PO) from the start of PO
period, till the end of predetermined planned period in such a way that first
U1+ remaining PO equals total predetermined planned period, then if job is not
completed requiring more time, due to unforeseen scope of work, unit will be
considered in second U1 for another maximum period of 168hours. Further, if
still job completion requires more time, unit will enter into MO.
CASE NO.18. With out the approval of Operation & Maintenance Division:
If a power plant defers, “an
agreed planned outage time period” to a later date falling within predetermined planned period and finishing
the job within predetermined planned period.
Provided that:
1) Job duration (new) is
lesser than original PO period
2) The job
completion date(new) is earlier or same as original completion date.
Resolution:
The unit will
be considered in (PO)
for remaining predetermined planned period and power plant has no right to request a different
duration than what was allocated in the original plan.
CASE NO.19. Without the approval of
Operation & Maintenance Division:
If a power plant defers, “an
agreed planned outage time period” to a later date falling after predetermined
planned completion date,
Provided that:
1) Job duration(new) is equal to original PO period
2) The job
starting date (new) is after the predetermined planned completion date.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, then unit will
enter into Maintenance Outage (MO) state.
Hence both
periods U1 + MO, equal to scheduled PO
period.
CASE NO.20. With out the approval of
Operation & Maintenance Division:
If a power plant defers, “an
agreed planned outage time period” to a later date falling within predetermined
planned period and an extension also takes place with out changing the scope of
work.
Provided that:
The job
starting date (new) is after the predetermined planned start date.
Resolution:
The unit will be considered in (PO) for remaining predetermined planned period
and if the job completion requires more time keeping the scope of work same,
unit will enter into SE OF PO.
CASE NO.21. Without the approval of
Operation & Maintenance Division:
If a power plant defers, “an agreed planned
outage time period” to a later date falling after predetermined planned
completion date and an extension also takes place with out changing the scope
of work :
Provided that:
1) Job duration (new)
is longer than the original PO period
2) The job
starting date (new) is after the predetermined planned completion date.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a period of 168 hours, then unit will enter
into Maintenance Outage (MO) state and if the job completion requires more time
keeping the scope of work same, unit will enter into SE OF MO.
Hence
periods U1& MO, will be equal to original scheduled PO period.
CASE NO.22.
Without the approval of Operation & Maintenance Division:
If a power plant defers,
“an agreed planned outage time period” to a later date falling after
predetermined planned start date, within the PO period along with a change in
scope of work.
Provided:
1) Job duration (new) is the
same as original PO period
2) The job
starting date (new) is after the predetermined planned start date.
Resolution: The unit will be considered in
(PO) for remaining predetermined planned period and changed scope of work
requires more time for completion, therefore unit will be in U1 for a maximum period of 168 hours. Further if
more time period is required for completion, unit will enter into MO, in such a
away that total of remaining PO period, U1 and MO equals to predetermined planned period.
CASE NO.23. Without
the approval of Operation & Maintenance Division,
If a power plant defers, “an agreed planned
outage time period” to a later date falling before predetermined planned
completion date and within the PO period. An extension also takes place along
with a change in the scope of work:
Provided that:
1) Job duration (new) is
longer than the original PO period
2) The job
starting date (new) is after the predetermined planned start date.
Resolution: The unit will be considered in
(PO) for remaining predetermined planned period and changed scope of work
requires more time for completion, therefore unit will be in U1 for a period of 168 hours. Further if more time
period is required for completion, unit will enter into MO in such a way that
remaining PO+U1+MO equals to predetermined planned period. But if still job is
not completed, the unit will be considered as SE of MO.
CASE NO.24. Without the approval of Operation & Maintenance Division, if a
power plant defers, “an agreed planned outage time period” to a later date
falling after predetermined planned completion date and an extension also takes
place along with a change in the scope
of work :
Provided that:
1) Job duration is longer
than the original PO period
2) The job
starting date (new) is after the predetermined planned completion date.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a
period of 168 hours, then unit will enter into Maintenance Outage (MO)
state such that first U1 + MO Equals predetermined planned period and if
the job completion requires more time due to change in the scope of work, unit
will enter into an other U1 for a maximum period of 168 hours.
MAINTENANCE
OUTAGE –(MO)
CASE NO.1. If Operation &
Maintenance Division request to shift, earlier, “an agreed Maintenance Outage
period”; on a given unit:
The (MO) period advancement would be carried
out as (MO) with the agreement of power
plant, who can (before the commencement of unit Maintenance Outage), demand the
same time period or different than what was previously scheduled.
CASE NO.2. If Operation &
Maintenance Division request the deferment, of, “an agreed Maintenance Outage
period”; on a given unit:
The (MO) period deferment
would be carried out as (MO) with the
agreement of power plant, who can (before the commencement of unit Maintenance
Outage), demand the same time period or different than what was previously
scheduled.
CASE NO.3. If Operation &
Maintenance Division request the advancement or deferment, of, “an agreed
Maintenance Outage period”; on a given unit, and an extension in time period
took place, without changing the scope of work:
The (MO) period advancement
or deferment would be carried out as
(MO), with the agreement of power plant, who can (before the
commencement of unit Maintenance Outage), demand the same time period or
different than what was previously scheduled.
But if the job could not be
completed on time then the unit will be entered into Scheduled Extension of
Maintenance Outage (SE of MO) state till the completion of job.
CASE NO.4. If Operation &
Maintenance Division request the advancement or deferment, of, “an agreed
Maintenance Outage period”; on a given unit, and an extension in time period took
place along with a change in scope of work:
The (MO) period advancement
or deferment would be carried out as
(MO) with the agreement of power plant, who can (before the commencement
of unit Maintenance Outage), demand the same time period or different than what
was previously scheduled but change in scope of work, delayed completion of
job, then the unit will enter into forced outage immediate (U1), for a maximum
period of 168 hours.
CASE NO.5. If power plant requests to
shift, “an approved Maintenance Outage period” to an earlier date and Operation
& Maintenance Division agrees:
The (MO) period advancement would be carried
out as (MO), for the same (previously) scheduled duration and power plant has
no right to request a different duration than what was scheduled in the
original plan.
CASE NO. 6.
If power
plant requests to defer, “an approved Maintenance Outage time period” to a
later date and Operation & Maintenance Division agrees:
The (MO) period deferment
would be carried out as (MO), for the same
(previously) scheduled duration and power plant has no right to request a
different duration than what was scheduled in the original plan.
CASE NO.7. If power plant requests the
advancement or deferment, of, “an approved Maintenance Outage period”; on a
given unit and Operation & Maintenance Division agrees and later on an
extension in time period takes place without changing the scope of work:
The (MO) period advancement
or deferment would be carried out as
(MO), for the time period as was
previously scheduled but if the job could not be completed on time then
the unit will be entered into Scheduled Extension of Maintenance Outage (SE of
MO) state till the completion of job.
CASE NO.8: If power plant requests the
advancement or deferment, of, “an approved Maintenance Outage period”; on a
given unit and Operation & Maintenance Division agrees and later on an
extension in time period takes place along with a change in scope of work:
The (MO) period advancement
or deferment would be carried out as (MO), for the time period as was previously
scheduled but change in scope of work delayed the completion of job, then for
the remaining job period, the unit will enter into forced outage immediate
(U1), for a maximum period of 168 hours.
CASE NO.9: Without the approval of
Operation & Maintenance Division:
If a power plant shifts, “an agreed Maintenance
Outage time period” to an earlier date producing a gap, between new start date
and original scheduled start date, greater, equal or less in duration as original
MO period.
Provided that:
1) Job
duration (new) is maintained equal to original MO period
2)
The job completion date (new) falls before or after the predetermined scheduled
start date.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours or till the
commencement of MO begins, which ever is earlier, then unit will enter into
Maintenance Outage (MO) state till the completion of job.
Hence both periods U1 & (remaining MO period),
equal to scheduled MO period.
CASE NO.10: Without the approval of
Operation & Maintenance Division:
If power plant shifts, “an agreed Maintenance Outage
time period” to an earlier date and an extension takes place without changing
scope of work.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, or till the
commencement of MO begins, which ever is earlier, then unit will enter into
Maintenance Outage (MO) state till the completion of job.
But if job is not completed within the originally scheduled MO period, requiring more
time with out changing scope of work, then unit will be considered in SE of MO.
Hence periods, U1, & remaining MO period
equal to original scheduled MO period.
CASE NO.11:. Without the approval of Operation & Maintenance Division:
If power plant shifts, “an agreed Maintenance Outage
time period” to an earlier date and an extension takes place along with a
change in scope of work.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, or till the
commencement of MO begins, which ever is earlier, then unit will enter into
Maintenance Outage (MO) state up till the
originally scheduled MO period. After wards due to change in scope of work, the
unit will be considered in another U1 for a maximum period of 168 hours, if
still require more time to complete the remaining job , then another MO will be
allocated.
Hence periods, first U1, & first
(remaining MO) period equal to original scheduled MO period.
CASE NO.12: Without the approval of
Operation & Maintenance Division:
If a power plant defers, “an
agreed Maintenance Outage time period” to a later date falling within the
predetermined Scheduled period and finishing the job within predetermined
Scheduled period.
Provided that:
1) Job duration (new) is
lesser than original MO period
2) The job
completion date (new) is same as original completion date.
Resolution:
The unit will
be considered in (MO)
for remaining predetermined scheduled period and power plant has no right to request a different
duration than what was allocated in the original plan.
CASE
NO.13: Without the approval of Operation & Maintenance Division:
If a power plant
defers, “an agreed Maintenance Outage time period” to a later date falling after
predetermined scheduled completion date,
Provided that:
1) Job duration (new) is equal to original MO
period
2) The job
starting date (new) is after the predetermined scheduled completion date.
Resolution: The unit will be considered in forced
outage (immediate) U1 for a maximum period of 168 hours, then unit will enter
into Maintenance Outage (MO) state.
Hence both
periods U1 + (remaining MO period) ,
equal to scheduled MO period.
CASE NO.14: Without the approval of
Operation & Maintenance Division:
If a power plant defers, “an agreed Maintenance
Outage time period” to a later date falling within the predetermined Scheduled
period then an extension takes place with out a change in scope of work.
Provided that:
The
job starting date (new) is after original job starting date.
Resolution: The unit will be
considered in (MO) for
remaining predetermined scheduled period and if job not finished, then unit will enter into
SE of MO.
CASE NO.15: Without the approval of Operation & Maintenance
Division:
If a power plant defers, “an agreed Maintenance
Outage time
period” to a later date falling after predetermined scheduled completion date, then an extension takes place with out a change in
scope of work.
Provided that:
The job starting date (new) is after the predetermined
scheduled completion
date.
Resolution: The unit will be considered in forced outage (immediate) U1 for a maximum period of 168 hours, then unit will enter into Maintenance Outage (MO) state. But if job is not completed within the originally scheduled MO period, requiring more time with out changing scope of work, then unit will be considered in SE of MO.
Hence both periods U1 + (remaining MO period)
, equal to scheduled MO period.
CASE NO.16: Without the approval of Operation
& Maintenance Division:
If a power plant defers,
“an agreed Maintenance Outage time period” to a later date falling after
predetermined scheduled start date, within the MO period along with a change in
scope of work.
Provided:
1) Job duration (new) is the
same as original MO period
2) The job
starting date (new) is after the predetermined Maintenance Outage start date.
Resolution: The unit will be considered in
(MO) for remaining predetermined Maintenance Outage period and changed scope of
work requires more time for completion, therefore unit will be in U1 for a
maximum period of 168 hours. Further if more time period is required for
completion, unit will enter into 2nd MO, in such a away that total
of remaining MO period, U1 and 2nd MO equals to predetermined
Maintenance Outage period.
CASE NO.17: Without
the approval of Operation & Maintenance Division,
If a power plant defers, “an agreed Maintenance
Outage time period” to
a later date falling before predetermined scheduled completion date and within
the MO period. An extension also takes place along with a change in the scope
of work:
Provided that:
1) Job duration (new) is
longer than the original MO period
2) The job
starting date (new) is after the predetermined Maintenance Outage start date.
Resolution: The unit will be considered in
(MO) for remaining predetermined Maintenance Outage period and changed scope of
work requires more time for completion, therefore unit will be in U1 for a
maximum period of 168 hours. Further if more time period is required for
completion, unit will enter into 2nd MO in such a way that remaining
1st MO+U1+2nd MO equals to predetermined Maintenance
Outage period. But if still job is not completed, the unit will be considered
as SE of MO.
CASE NO.18. Without the approval of Operation & Maintenance Division:
If a power plant defers, “an
agreed Maintenance Outage time period” to a later date falling after predetermined scheduled
completion date and an extension also takes place along with a change in the scope.
Provided that:
1) Job duration is longer
than the original MO period
2) The job
starting date (new) is after the predetermined Maintenance Outage completion date.
Resolution: The unit will be considered in
forced outage (immediate) U1 for a maximum period of 168 hours, then unit will
enter into Maintenance Outage (MO) state such that first U1 + MO Equals predetermined
Maintenance Outage period and if the job completion requires more time due to
change in the scope of work, unit will allocated an other U1 for a maximum
period of 168 hours.
Reserved Shut Down
State
CASE NO.1
Unit was in state of
RS , demanded by System Control, unit started and synchronized with the System
Network successfully, there after unit
entered into state of (SH).
CASE NO.2
Unit was in state of
RS and PO time commences, therefore unit entered into PO state.
Unit was in state of
RS and MO time commences, therefore unit entered into MO state.
CASE NO.4
Unit was in state of RS and Control demanded
for synchronization with System Network, but Start Failure appeared, therefore
unit entered into SF state for a maximum period of 168 Hours.
Unit was in state of
RS and Control demanded for synchronization with System Network, but Start
Failure appeared. The unit entered into SF state for a maximum period of 168
Hours but trouble could not be resolved within 168 Hours thereafter unit
entered into Maintenance Outage(MO).
CASE NO.6
Unit was in state of RS and during RS some
maintenance was carried out , creating no hurdle for unit to be
synchronized with System Network, therefore unit remained in
the state of RS .
Unit was in state of RS and during RS some
maintenance was carried out , and as a result of maintenance work unit could
not be synchronized with
System Network, therefore unit state (RS) transformed to Unplanned
Forced Outage (U1) for a maximum period of 168 Hours.
CASE NO.8
Unit was in state of RS and during RS some
maintenance was carried out , and as a result of maintenance work unit could
not be synchronized with
System Network, therefore unit state (RS) transformed to Unplanned
Forced Outage (U1) for a period of 168 Hours
and still unit could be made ready for synchronization, then the unit would
be considered in MO State.
Unplanned
Forced Outage
CASE NO1: Unit Remained In Either Of U1, U2, U3 For 168 Hours Continuously:
If a unit remains in
any Unplanned Forced outage (U1, U2 , U3) for 168 hours continuously, there the fore unit state must be changed from (U1, U2 ,U3) to MO .
CASE NO2: Due to some trouble, taking unit out of Service Immediately or Transfer from other Outage States, including RS as U1.
Prevailing state of
the unit be Finished and declare the unit in Unplanned forced Outage Immediately
(U1) for a maximum period of 168 hours.
CASE NO3: Due to some trouble, Taking unit out of Service Within 6 Hours by informing Operation & Maintenance Division and System Control:
Due to some trouble if a unit requires immediate removal from the in-service state within next 6 hours, inform Operation & Maintenance Division and System Control and put the unit into Unplanned Forced Outage (U2) for a maximum period of 168 hours.
CASE NO4: Due to some trouble, Taking unit out of Service After 6 Hours by informing Operation & Maintenance Division and System Control:
Due to some trouble if a unit requires immediate removal from the in-service state after next 6 hours, inform Operation & Maintenance Division and System Control and put the unit into Unplanned Forced Outage (U3) for a maximum period of 168 hours.
CASE NO5: Unit
Recovered from Either of (U1, U2, U3) and not required by System Control for
Operation:
If a unit remains in
any Unplanned Forced outages (U1, U2, U3) for less than or equal to 168 hours
and trouble had been removed before the laps of 168hours, terminate the Prevailing State(U1, U2, U3) of
the unit and declare the unit in RS if
not required by the System Control for operation.
CASE NO 6: Unit
Recovered from Either of (U1, U2, U3) and required by System Control for
Operation:
If a unit remains in
any Unplanned Forced outages (U1, U2, U3) for
less than or equal to 168 hours and trouble had been removed before the laps of 168hours, terminate the Prevailing State(U1, U2,U3) of
the unit and Operate normally for System Control, declaring the unit in
SH.
CASE NO 7: Unit
Recovered from Either of (U1, U2, U3) and required by System Control for
Operation but unable to synchronize after start-up:
If a unit remains in
any Unplanned Forced outages (U1, U2 , U3) for
less than or equal to 168 hours and trouble had been removed before the laps of 168hours , terminate the
Prevailing State(U1,U2,U3) of the unit
and unit was required to be placed on line but could not reach
synchronization, enter the unit into SF
for a maximum period of 168 hours.
CASE NO 8: If a unit is in Unplanned Forced Outage
(UX-1) and during that period another Unplanned Forced Outage (UX-2)
occurs.
Consider the unit in
Unplanned Forced Outage (UX-1) till the removal of trouble or up to 168 hours
maximum and Unplanned Forced Outage (UX-2) will not be considered.
CASE NO 9: If a unit is in Unplanned Forced Outage
(UX-1) and during that period another Unplanned Forced Outage (UX-2) occurs and
(UX-1) crosses 168 hours.
Consider the unit in Unplanned Forced Outage
(UX-1) state for specified maximum168 hours and if the cause of (UX-1) is not
being resolved, then place the unit in Maintenance Outage (MO) state although
another Unplanned Forced Outage (UX-2) had occurred which will not be
considered.
CASE NO 10: If
a unit is in Unplanned Forced Outage (UX-1) and during that period another
Unplanned Forced Outage (UX-2) occurred, but resolved before the laps of
Unplanned Forced Outage (UX-1) time period.
Consider the unit in
Unplanned Forced Outage (UX-1) till the removal of trouble or up to 168 hours
maximum and Unplanned Forced Outage (UX-2) will not be considered.
CASE NO 11: If a unit is in Unplanned Forced Outage (UX-1) and during that period another Unplanned Forced Outage (UX-2) occurred, resolved before the laps of (UX-1) period which is greater than 168 hours.
Consider the unit in
Unplanned Forced Outage (UX-1) state till the resolution or for
specified maximum168 hours and if the cause of (UX-1) is not being resolved,
then place the unit in Maintenance Outage (MO) state although another Unplanned
Forced Outage (UX-2) had occurred and resolved before the laps of (UX-1)
allocated period, hence (UX-2) will not be considered in this case.
CASE NO 12: If
a unit is in Unplanned Forced Outage (UX-1) and during that period another
Unplanned Forced Outage (UX-2) occurred & not resolved (UX-2) before the
laps of (UX-1).
Consider the unit in
Unplanned Forced Outage (UX-1) state till the resolution or and if the
cause of (UX-1) has been resolved and the cause of (UX-2) has not been resolved then place the
unit in Unplanned Forced Outage (UX-2) in such a way that time period of
(UX-1) &
Remaining (UX-2)
equal to 168 hours maximum. Record the (UX-2) starting from end of (UX-1) time
period.
CASE NO 13: If
a unit is in Unplanned Forced Outage (UX-1) and during that period another
Unplanned Forced Outage (UX-2) occurred & not resolved (UX-2) before the
laps of (UX-1) time, crossing the maximum limit of 168 hours.
Consider the unit in
Unplanned Forced Outage (UX-1) state till resolution of its cause, and if the
cause of (UX-2) has not been resolved
then place the unit in Unplanned Forced Outage (UX-2) in such a way that:
Total time periods of (UX-1) & remaining
of (UX-2) equal to 168 hours maximum. If still the cause of (UX-2) requires
more time for its resolution, consider the unit in Maintenance Outage (MO).
Record the (UX-2) starting from end of (UX-1) time period.
CASE NO14: Unit
not recovered from Either of (U1, U2, U3) and commencement of Maintenance
Outage MO begins.
Keep the unit in (U1,
U2, U3) state till resolution of its cause or up to 168 hours maximum but
if the commencement of MO period begins before the lapse of 168 hours consider the
unit in MO from the start date of MO.
CASE NO15: Unit
not recovered from Either of (U1, U2, U3) and commencement of Planned Outage
PO begins.
Keep the unit in (U1,
U2, U3) state till resolution of its cause or up to 168 hours maximum but
if the commencement of the PO period begins before the lapse of 168 hours consider the
unit in PO from the start date of PO.
START
UP FAILURES (SF)
CASE NO 1: Unit Remained In Start-Up Failure For 168
Hours Continuously:
If a unit remains in
Start-Up Failure (SF) for 168 hours continuously, there fore unit state
must be
changed from (SF ) to Maintenance
Outage MO.
CASE NO2: Unit
Recovered from Start-Up Failure (SF) and not required by System Control for
Operation:
If a unit remains in
Start-Up Failure (SF) for less than or equal to 168 hours and trouble
had been removed before the laps of 168hours terminate the Prevailing State
(SF) of the unit and declare the unit in RS if not required by the System
Control for operation.
CASE NO 3: Unit
Recovered from Start –Up Failure (SF) and required by System Control for
Operation:
If a unit remains in
Start –Up Failure (SF) for less than or equal to 168 hours and trouble had
been removed before the laps of 168 hours , terminate the Prevailing State(SF)
of the unit and Operate normally for System Control , declaring the unit in
SH.
CASE NO 4: If
a unit is in Start –Up Failure (SF-1) and after its resolution unit started,
during the Start –Up we encountered another failure i.e. (SF-2) occurred .
Consider the unit in
Start –Up Failure (SF-1) state till the resolution of cause of
(SF-1) and unit
started but failed for second time. Therefore encountered SF-2 can be allocated
a time period in such a way that time periods for
(SF-1) + (SF-2)= 168 (maximum) hours. If the
job still remain incomplete, unit will be scheduled as MO.
CASE NO 5: If
a unit is in Start –Up Failure (SF) and during that period Encountered a
trouble disallowing to Re-start & resolved the before the laps of (SF).
Declare the unit
Start –Up Failure (SF) state till the resolution or for a maximum period of
168 hours. If cause of SF not rectified within 168 hours, consider the unit in
MO. Since U1 was resolved before laps of SF time period, hence will not be
considered.
CASE NO 6: If
a unit is in Start –Up Failure (SF) and during that period Encountered a
trouble disallowing to Re-start & not resolved before the laps of (SF).
Declare the unit
Start –Up Failure (SF) state till the resolution or for a maximum period of
168 hours. If cause of secondary encountered trouble not rectified within
remaining of 168 hours, then consider the unit in MO. Since U1 was not resolved
before laps of SF time period, hence time periods of (SF+ U1) will be equal to
168 hours.
Record the (U1)
starting from end of (SF) time period.
CASE NO 7: If
a unit is in Start –Up Failure (SF) and commencement of Maintenance Outage
(MO) begins.
Keep the unit in (SF)
state till resolution of its cause or up to 168 hours maximum but if
commencement of MO period begins before the lapse of 168 hours consider the
unit in MO from the start date of MO.
CASE NO 8: If
a unit is in Start –Up Failure (SF) and commencement of Planned Outage (PO)
begins.
Keep the unit in (SF)
state till resolution of its cause or up to 168 hours maximum but if commencement
of PO period begins before the lapse of 168 hours consider the unit in PO from
the start date of PO.
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