Lead from the front Texas Nodal 1 Texas Nodal Load Frequency Control (LFC) EDS 3 Release 6 - Handbook EDS 3 Release 6 MP Planning

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Texas Nodal

Texas Nodal

Load Frequency Control (LFC)EDS 3 Release 6 - Handbook

EDS 3 Release 6 MP Planning Workshop

September 12, 2007


Texas Nodal

EDS - Early Delivery System

Agenda:

– Release 6 (R6) LFC Overview– LFC - R6.1: ACE Calculation and Pre-condition

Validation– LFC - R6.2: Load Frequency Control Individual QSE – LFC - R6.3: Load Frequency Control Total System– Next Steps– Discussion / Questions?


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LFC EDS3 R6

Overview:

– Release 6 will consist of 3 steps:• LFC - R6.1: ACE calculation and Pre-condition Validation

• LFC - R6.2: Load Frequency Control Individual QSE

• LFC - R6.3: Load Frequency Control Total System

– LFC – R6.1 starting January 2008– LFC – R6.2 scheduled starting March 2008– LFC – R6.3 scheduled June 2008 and completed before

the 168 hour test in August 2008


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LFC – R6.1: ACE Calculation and Pre-condition validation

Overview – – Compare continuously for 7 days Nodal ACE results with Zonal ACE

results for accuracy– Verify RLC calculations of

• High and Low Ancillary Service Limit HASL, LASL, • SCED Up and Down Ramp SURAMP, SDRAMP, • High and Low Dispatch Limit HDL, LDL

– Verify ability to calculate and issue Emergency Base Points to QSEs– Verify Ancillary Service Capacity Monitor results

Market Participant Involvement –– Modify data in MP Nodal Systems for verification of calculations in

ERCOT Nodal systems (full integrated test)– Verify the receipt of Emergency Base Points from ERCOT

Market and Settlements –– Physical Resources continue to be controlled by the Zonal system– No impact to Zonal market or settlements


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LFC – R6.1: ACE Calculation and Pre-condition validation

EDS 3 R6.1 – LFC Testing

MMS

SCED

Validation`

Market Participant Offer and Bid

Submission Tools

* Base Points * LMPs* TimeStamp

EMS

Cyclic - 5 minExecution

Every 4 sec

SCADA

LFC

RLC

ICCP

ICCP

LFC

* SCED BP (Resource)* UDBP (Resource)* EMBP (Resource)* REGUP (QSE)* REGDN ( QSE)

* MW Output* HSL/LSL* AS Responsibility* AS Schedule* Ramp Rates* Participation Factors* Resource Status

Every 4 sec

* HDL/LDL* HASL/LASL* MW Output* GTBD (System)

Asynchronous Trigger

RTU’s

Generators and Loads

Constraints and

Shift Factors

Execution

QSE

Base Points

5-min Resource Specific Base Point

Schedule


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LFC – R6.2: LFC Testing for Individual QSEs

Overview – – ERCOT will verify that each QSE and Resource has the ability to

receive Nodal deployment signals and provide Regulation Control on their Nodal Systems.

– ERCOT will verify Resources follow the QSE provided Regulation Participation Factor

– Test Period for Regulation verification will be at least 1 hour. – Verify for each QSE the ability to operate on constant frequency

control when requested by ERCOT.– Test Period for constant frequency control is approximately 15

minutes


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LFC – R6.2: LFC Testing for Individual QSEs cont..

Market Participant Involvement –– All QSE Resources to provide Regulation at the commencement of

Nodal should participate in the test– QSE shall provide 5 minute Resource specific schedules to ERCOT

prior to the test. The 5 minute schedules represent a Resource specific allocation of the 15 minute Zonal Schedules.

– During the test, Resources should follow the Nodal dispatch of Regulation and the LFC 4 second Updated Desired Base Points.

– Each Resource under test must deploy Regulation during the test period (Participation Factor > 0).


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Market and Settlements –– QSE may participate in the Zonal Ancillary Service Market as normal– QSE Resource’s under test can not participate in the Zonal Real-

Time Balancing Market during the test period– Ratio of the Regulation obligation of the QSE under test to the total

ERCOT requirement will be based on the outcome of the Zonal Ancillary Service Market.

– QSE’s can also Self-arrange Resources for the test– QSE’s under test will not be subjected to Uninstructed Resource

Charges (URC) for the hour before the test period, during the test period and the hour following

– VDI’s records will be sent to ERCOT Settlement group for the hours the QSE participated in LFC Regulation testing.

– For periods not covered by the VDI, all URC will apply


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MMS

SCED

Validation`


Submission Tools


EMS


Every 4 sec

SCADA

LFC

RLC

ICCP

ICCP

LFC



Every 4 sec



RTU’s


Constraints and

Shift Factors

Execution

QSE

Base Points


Schedule


Texas Nodal

LFC – R6.3: LFC Testing for the Total System

Overview – – ERCOT to verify the ability to control system frequency with LFC

with all QSE and Resources (total system) providing Regulation in Nodal.

– Verify LFC’s ability to meet NERC control systems performance criteria

– Will require three tests of approx. 2, 8 and 48 hours.– A Resource must complete EDS 3 R6.2 testing to provide

Regulation in EDS 3 R6.3.


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LFC – R6.3: LFC Testing for the Total System cont..

Market Participant Involvement –– All QSE’s providing Regulation will be required to follow the

Regulation deployment signal from Nodal (LFC).– Each Resource obligated to provide Regulation must deploy

Regulation during the test period as per the Nodal Regulation signal and the telemetered Participation Factor.

– Ratio of the Regulation obligation of the QSE under test to the total ERCOT requirement will be based on the outcome of the Zonal Ancillary Service Market

– All QSE’s must follow SCED calculated 5 minute Base Points and the LFC 4 second Updated Desired Base Point.

– All QSE’s must provide Energy Offer Curves and Output Schedules for SCED representative of the same QSE portfolio Balancing Energy Service submitted in the Zonal system.


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Market and Settlements –– During the test period, ERCOT will settle transactions based on the

Zonal Protocols using MCPEs calculated in the Zonal Market.– MPs will continue to update their Resource Plans, Base Power

Schedules and Zonal Port Folio Offers during the test periods. The constraints activated in Zonal RTCAM will also be active in Nodal TCM. MPs shall continue to update their Zonal schedules and Balancing Energy Service offers.

– During the test, QSEs should follow the SCED Base Points and the LFC 4 second Updated Desired Base Point provided by the Nodal system and ignore the OOME Dispatch Instructions from the Zonal system.

– Units deployed by the Zonal Market for OOME and Local Balancing Energy will have their instructed output levels replaced with weighted average SCED Base Point instructions.


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Market and Settlements –– QSEs will not be subject to Uninstructed Resource Charges (URC)

for the hour before the test period, during the test period and the hour following the test period.

– Verbal Dispatch Instructions (VDI) records will be sent to the ERCOT Settlement group for the hours the QSE participated in LFC Regulation testing.

– If the test is discontinued and Resources are returned to Zonal control, then URC will apply following the first full hour of resumed zonal operations.


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MMS

SCED

Validation`


Submission Tools


EMS


Every 4 sec

SCADA

LFC

RLC

ICCP

ICCP

LFC



Every 4 sec



RTU’s


Constraints and

Shift Factors

Execution

QSE

Base Points


Schedule


Texas Nodal

LFC EDS3 R6

Next Steps:– Execution dates

• LFC – R6.1: Jan 14th • LFC – R6.2: Mar 17th

• LFC – R6.3: June to Aug 2008, before 168 hour test

– Handbook release and approval targets• Sept 12th : Release draft of LFC Market Participant handbook to MP and TPTF• Sept 20th : TPTF comments expected• Sept 25th : Present at TPTF - Discussion on comments • Oct 4th : Forward Redline with disposition sheet to TPTF• Oct 9th : TPTF Vote on LFC Handbook

– What do MPs need to do • Review LFC handbook and provide comments before Thursday September 20 th. Email

comments to [email protected]• Continue implementing EMS Nodal system changes to support LFC• Preparation for involvement in LFC – R6.1 ACE calculation and Pre-condition

Validation testing

– What ERCOT is doing• Continue systems implementation• Develop detailed test procedure for LFC – R6.1 ACE calculation and Pre-condition

Validation testing


Texas Nodal

LFC EDS3-R6 – Questions?

Discussion and Questions?

[email protected]

Documents

Lead from the front Texas Nodal 1 Texas Nodal Load Frequency Control (LFC) EDS 3 Release 6 - Handbook EDS 3 Release 6 MP Planning