TNB Operation 20Planning

7/31/2019 TNB Operation 20Planning

1/41

Asean Residential School in ElectricalEngineering (ARSEPEO6), 9 January 2007,Universiti Tenaga Nasional

1

Operation planning

(L5)


2/41


2

A power system


3/41


3

TNB power system

PG (Singapore)

EGAT (Thailand)

TNB (P. Malaysia)


4/41


4

TNB power system

Transmission Voltage 500kV

275kV

132kV 66kV

Generation Total 18,323MW

(installed)

TNB 10,836MW (59%)

IPP 7,487MW (41%)

Demand 12,990MW (08/06)

12,724MW (11/06)


5/41


5

TNB power system

=


6/41


6

Who is who in the industry (in Pen. Malaysia)


7/41


7

Interconnectivity of systems (in Pen. Malaysia)


8/41


8

Grid codes & licence standards


9/41


9

Building operation reliability & robustness TNB case


10/41


10

1. TNB License (reflected in the Transm issionSystem Reliability & Pow er Quality

Standards)2. The Malaysian Grid Codes

3. TNBs contractual obligations

4. Operation based on the least cost

5. TNBs business objectives

Governing principles for operation TNB case


11/41


11

Governing principles (continued)

1. TNB License;granted underthe ElectricitySupply Act

1990

The Licensee shall operate &m aintain its transm ission and the

connected generators, in

accordance w ith the license

standards (i.e. Condition no.13)

2. Transmission

SystemReliabilityStandards

(TSRS)

Generation security standards

Operation under no contingency

Operation under secured contingency

Operation under m ultiple

contingency

Operation under unsecured

contingency


12/41


12


3. TransmissionSystem PowerQualityStandards

(TSPQS)

Voltage sag Voltage step change

Voltage fluctuations & flicker

Harm onics

Phase unbalance & traction load

Step change of pow er


13/41


13


4. MalaysianGrid Codes

Planned outages (generator units &transmission)

Assignm ent of spinning reserve

Day ahead unit com m itm ent andgeneration schedules

W eekly operation plan

Annual operation plan Monitoring & testing

Planning data

Num bering of equipm ent in the gridsystem


14/41


14


5. PowerPurchaseAgreements(PPAs)

13 PPAs betw een TNB & IPPs(currently in operation)

6. OtherAgreements

TNB-EGAT:

System Interconnection Agreement(2202)

Supplementary Agreement (2004)

7. TNB

requirements

TNB Process Standardisation &

Im provem en t Procedures (ISO) Risk Managem ent

Governance on disclosure of internal

information


15/41


15

1. Matching generation (output) with the forecastdemand together with generation reserves

2. Taking into account, outages of generation andtransmission system

3. Complying the grid codes and the license

standards4. Meeting contractual obligations

5. Meeting least cost operation

6. Carrying out OP during operational timescale

Operation planning (OP) tasks


16/41


16

Operation planning timescales

1. One day ahead (daily ; 24 hours; hour 0 0:00hour to hour 24:00 )

2. One week ahead (w eekly Friday to Thursday )

3. One month ahead (monthly)

4. One year ahead (yearly ; 1 Septem ber to 31

August)5. 2 years ahead (yearly)

6. 5 years ahead (yearly)


17/41


17

Operation planning - activities

Daily Processes Monthly/ Weekly Processes Yearly Processes

1. Planning-System Operationcoordination (docket meeting)

2. Management of generator unitsavailability

3. Scheduling energy import/exportexchange

4. Scheduling generator unitplanned outages

5. Scheduling transmission plannedoutages

6. Scheduling of commissioning(transmission)

7. Scheduling of system tests (if any)8. Scheduling of unit commitment

and generation schedule

9. Assessment of system security

1. Scheduling of generator unitplanned outages

2. Scheduling of transmissionplanned outages

3. Scheduling of unit commitmentand generation schedule

4. Scheduling of gas nomination5. Transient security assessment

(WTSA)

6. Plan coordination (OPP-NLDCmeeting)

7. Fault level & system security

analysis8. Reports to regulators &

government.

1. Two Year SystemOperation Plan(Transmission)

2. Five Year SystemOperation Plan(Production)

3. Generation Mixreport

4. Generation Security Standard Report

5. OperationCoordination (Joint

OperationCommittees)

6. Grid SystemPerformanceReport

As & when required1. Updating planning data (on the grid system and on the fuel price variation)

2. Managing fuel supply variation (including gas curtailment).

3. Validating availability of stand-by fuel

4. Submission of data/reports to Regulators, Government and TNB authorities

5. Power Quality Monitoring & Measurement


18/41


18

Operation planning an overview(as documented in TNB ISO m anual)


19/41


19

Operation Planning (OP) planning cycles

Monthly/weekly OP

Daily OP

Real-timeOperation

OPP (System Planning) department

NLDC department

Annual OP


20/41


20

Operation Planning (OP) yearly cycles

Monthly/weekly OP

Daily OP

Real-timeOperation


NLDC department

Annual OP

1. Two Year System Operation Plan (Transmission)

2. Five Year System Operation Plan (Production)

3. Generation Mix report4. Generation Security Standard Report

5. Operation Coordination (Joint OperationCommittees)

6. Grid System Performance Report

Annual OP


21/41


21

Operation Planning (OP) monthly/weekly cycles

Monthly/weekly OP

Daily OP

Real-timeOperation


NLDC department

Annual OP

1. Scheduling of generator unit planned outages2. Scheduling of transmission planned outages

3. Scheduling of unit commitment andgeneration schedule

4. Scheduling of gas nomination5. Transient security assessment (WTSA)

6. Plan coordination (OPP-NLDC meeting)

7. Fault level & system security analysis

8. Reports to the government, regulators & TNB.

Annual OP


22/41


22

Operation Planning (OP) daily cycles

Monthly/weekly OP

Daily OP

Real-timeOperation


NLDC department

Annual OP

1. Planning-System Operation coordination(docket meeting)

2. Management of generator units availability3. Scheduling energy import/export exchange4. Scheduling generator unit planned outages5. Scheduling transmission planned outages

6. Scheduling of commissioning (transmission)7. Scheduling of system tests (if any)8. Scheduling of unit commitment and generation

schedule

9. Assessment of system security

Annual OP


23/41


23

Five Year System Operation Plan (FYOP)

FYOP addresses operation plan up to 5 years ahead,focusing on adequacy of generation capacity andproduction cost.

FYOP report highlights:

Demand forecast & growth Generation capacity and operating margins Generation mix

Operation cost Possible mitigative measures: -

Adjusting outage (maintenance) schedule Addressing stand-by fuel & stock

Uses software tools: PMonth (production schedule & cost optimisation)

Ref: W ork Instruction Level 3 no. TNBT-SPOD-750 -01-OPP-W I-09


24/41


24

Generation Mix report (Genmix)

Genmix report addresses forecast generation for the(one) year ahead, mainly as input for preparingfinancial budget for:

Operation of TNBs Power Stations and Energy payment to IPPs

Genmix report highlights (for one year ahead): Forecast of generation production.

Forecast of generation mix by fuel type.



i i d d ( )


25/41


25

Generation Security Standard report (GSS)

Generation Security Standard (GSS) report addressesthe system generation capability to meet theforecast load and energy demand for up to 5 years

ahead.GSS report highlights: Demand forecast Generation capacity and operating margins



i h d li


26/41


26

Generator units outage scheduling

The objective is to satisfy request (by IPP/TNB powerplants) for planned outages for generator units (forscheduled, maintenance, repair, etc) yet to ensure:

The grid system is secured and reliable Generation reserve margin is adequate Cost of production is maintained at optimum level Availability of gas supply is within limits (declared by Petronas)

Hydro lake level (Kenyir and Temengor) are within targetsScheduling process:

Rolling five year outage plan (maintained in a database)

Revised annually, quarterly (for TNB plants) Finalised and confirmed weekly



27/41


27

Weekly generation and unit commitment schedules

The objectives are: To plan for generator unit start/stop schedule To estimate quantum of gas supply requirement To plan for hydro lake level (based on the current level)

The plan is at the optimum cost (for the given demandforecast & planned outage schedule).

Scheduling process: Review availability of unit & capacity of generator units Review availability of gas supply (in mmscfd volume) Develop generation schedule based on the demand forecast

Uses software tools:

PCOM (production schedule & cost optimisation)


h d d h d l


28/41


28

Day ahead generation and unit commitment schedules

The objectives are: To confirm power exchange between TNB & EGAT To develop the plan for committing generator units and their output

on a half-hourly basis for 24 hours operation during the next day[See *] from hour 00:00 to hour 24:00.

To work-out that the plan meets the forecast demand with adequatespinning reserve throughout the day

The plan is at the optimum cost.

Scheduling process: Review availability of unit & capacity of generator units Review availability of gas supply (in mmscfd volume) Develop generation schedule based on the demand forecast

Uses software tools: PCOM (production schedule & cost optimisation)

* W eekend/ holidays are given special exception

Ref: W ork Inst ruction Level 3 no. TNBT-SPOD-750 -0 1-OPP-W I-0 3

T Y S O i Pl (TYSOP)


29/41


29

Two Year System Operation Plan (TYSOP)

TYSOP addresses operation plan two years ahead, focusing on

adequacy of transmission and stability of the grid system.TYSOP report highlights:

Operational issues in specific Regions (Northern, Eastern,Central and Southern)

Operational issues of interconnection with Singapore and withThailand

Impacts of new generation plant coming on-line

Possible mitigative measures, taking into account: - Committed transmission & generation development plan Possible transmission options Defence plan

Uses software tools: PSS/E (power flow, OPF, fault level, and transient stability) DSA Power Tools (transfer limit, voltage and transient security).


T i i


30/41


30

Transmission outage management

The objective is to satisfy request for planned outages for

transmission apparatus (for scheduled maintenance, repair,construction, etc) yet to ensure:

The grid system is secured and reliable Cost of production is maintained at optimum level The above are confirmed through studies

Scheduling process: Maintain details of planned outages (in a database)

Coordinate with planned outages of generator units Revised monthly, confirmed one week up to 10 days ahead Revised and re-confirmed 1 day ahead Highlight controls (if necessary to maintain system security)

Uses software tools: WOMS (Web-based Outage Management System) PSS/E (for conducting studies of individual outage cases)

Ref: W ork Inst ruction Level 3 no. TNBT-SPOD-750 -0 1-OPP-W I-0 5

C di i f i i i * f i i


31/41


31

Coordination of commissioning* of transmission

The objective is to satisfy request for commissioning of

transmission apparatus (for new equipment) yet to ensure: The new apparatus meet the general requirement for safe and

correct operation, in terms of connectivity & labeling Impact to the transmission network is minimum (even if the

commissioning is unsuccessful)Coordination process:

Prepare equipment drawings (3 months ahead) Assign numbering of equipment (in the drawing) Prepare commissioning memorandum & submit to NLDC for

implementation (7 days ahead minimum) Prepare switching program (in the commissioning memo)

* Com m issioning refers to energising transm ission equipm ent for the 1st time

Ref: W ork Instruction Level 3 no. TNBT-SPOD-750 -0 1-OPP-W I-16

E l f thl t i i t l


32/41


32

Example of a monthly transmission outage plan

E l f ti l d i t


33/41


33

Example of a contingency plan during outage

E l f ti l d i t


34/41


34


E l f ti l d i t


35/41


35


E l f ti l d i t


36/41


36


E ample of a commissioning memo (1)


37/41


37

Example of a commissioning memo (1)



38/41


38




39/41


39




40/41


40




41/41

Asean Residential School in ElectricalEngineering (ARSEPEO6) 9 Jan ar 2007

41


TNB Operation 20Planning

Documents

Transcript of TNB Operation 20Planning