Requirements for Real and Reactive Power Testing

Reliability Rules Subcommittee MeetingNew York State Reliability Council

September 4, 2008

Kathy WhitakerManager, Auxiliary Market Operations

New York Independent System Operator

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Background Background –– Real PowerReal PowerNYISO Real Power Data Requirements

Requirements apply to all generators participating in the Installed Capacity market NYISO collects net real power test (or operational) data for both summer and winter capability periods

• Net values conservative for Installed Capacity market sales

• Considers summer and winter performance differences

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NERC and NPCC Requirements NERC and NPCC Requirements for Real Power Testingfor Real Power Testing

NERC MOD-024-1 defines Regional Reliability Organization and Generation Owner requirements for real power testing

Requirement R1 directs the Regional Reliability Organization to establish procedures for gross and net real power capability verification

NPCC Directory 9 (posted for comment) defines Generator Owner and Transmission Operator requirements for real power testing

Section 1.3 states that the directory has been developed to meet the requirements of NERC Standard MOD-024-1

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NERC and NPCC Requirements NERC and NPCC Requirements for Real Power Testingfor Real Power Testing

NERC MOD-024-1 Requirement 1.5.1 identifies the need to report seasonal gross and net Real Power generating capabilitiesNERC MOD-024-1 Requirement 1.1 directs that Regional Reliability Organization procedures define generating unit exemption criteriaNPCC Directory 9 Section 5.3.1.2 allows exemption from the criteria to collect both gross and net real power data

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Background Background –– Reactive PowerReactive PowerNYISO Reactive Power Data Requirements

Requirements apply to all generators supplying Voltage Support ServiceNYISO collects gross reactive power test (or operational) data each year

• Negotiated tariff rate based on tested gross reactive power capability

• Availability of existing metering equipment considered during negotiations of tariff rate

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NERC and NPCC Requirements NERC and NPCC Requirements for Reactive Power Testingfor Reactive Power Testing

NERC MOD-025-1 defines Regional Reliability Organization and Generation Owner requirements for reactive power testing

Requirement R1 directs the Regional Reliability Organization to establish procedures for gross and net reactive power capability verification

NPCC Directory 10 (posted for comment) defines Generator Owner and Transmission Operator requirements for reactive power testing

Section 1.3 states that the directory has been developed to meet the requirements of NERC Standard MOD-025-1

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NERC and NPCC Requirements NERC and NPCC Requirements for Reactive Power Testingfor Reactive Power Testing

NERC MOD-025-1 Requirement 1.5.1 identifies the need to report seasonal gross and net Reactive Power generating capabilitiesNERC MOD-025-1 Requirement 1.1 directs that Regional Reliability Organization procedures define generating unit exemption criteriaNPCC Directory 10 allows exemptions from collection criteria to collect both gross and net reactive power data each season

Section 5.3.1.1 allows exemption for collecting reactive power capability data during one season onlySection 5.3.1.2 allows exemption from collecting both gross and net reactive power

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Bases for NYISO Data CollectionBases for NYISO Data CollectionIt is sufficient to collect only net real power data, since it is an accurate measure of power available to serve loadGross reactive power values are more accurate for Planning studies and Operations analysis, since the impact of generator step-up transformers and auxiliary loads are explicitly represented in power flow modelsSummer testing conditions produce conservative values of generator power capability, so only summer reactive power data is collected

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ConclusionsConclusionsExceptions allowed by Sections 5.3.1.1 of Directory 10 and 5.3.1.2 of Directories 9 and 10 are permitted according to exemption provisions of Requirements 1.1 of MOD-024-1 and MOD-025-1Specifications in NYSRC C-M1 that are different from gross and net requirements of NYISO Installed Capacity market and Voltage Supply Service would require some additional generator metering and could be disruptive

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RecommendationRecommendationRevise the wording of C-M1 as follows:“…The procedures shall include requirements for resource providers to provide to the NYISO the net MW at the time of the DMNC test, and the net MW and gross MVAr quantities taken simultaneously at the time of the reactive power capability test…

…The NYISO shall provide dependable net capacity and gross reactive power capacity data to the operating function of the Transmission Owner that the resource connects to, within 60 calendar days following the close of the capability period.”

The New York Independent System Operator (NYISO) is a notThe New York Independent System Operator (NYISO) is a not--forfor--profit profit corporation that began operations in 1999. The NYISO operates Necorporation that began operations in 1999. The NYISO operates New Yorkw York’’s bulk s bulk electricity grid, administers the stateelectricity grid, administers the state’’s wholesale electricity markets, and provides s wholesale electricity markets, and provides

comprehensive reliability planning for the statecomprehensive reliability planning for the state’’s bulk electricity system.s bulk electricity system.____________________________________________________________________________________________________________________

www.nyiso.comwww.nyiso.com

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Appendix Appendix –– NERC MODNERC MOD--024024--11R1. The Regional Reliability Organization shall establish and maintain procedures to address verification of generator gross and net Real Power capability. These procedures shall include the following:

R1.1. Generating unit exemption criteria including documentation of those units that are exempt from a portion or all of these procedures.R1.5. Information to be verified and reported:

• R1.5.1. Seasonal gross and net Real Power generating capabilities.

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Appendix Appendix –– NPCC Directory 9NPCC Directory 91.3 Objective

This Directory presents the minimum criteria for verifying the Gross Real Power Capability and Net Real Power Capability of generators or generating facilities.

Compliance to the criteria set forth in this Directory by each applicable entity assures accuracy of information used in the steady-state models to assess the reliability of the NPCC bulk power system. This Directory has been developed to ensure that the requirements specified in NERC Standard MOD-024-1,“Verification of Generator Gross and Net Real Power Capability” are met by NPCC and its applicable members responsible for meeting the NERC Reliability Standards.

5.3.1.2If a Transmission Operator determines that the difference between Gross Real Power and Net Real Power Capability of a generator or generation facility is insignificant for NPCC Bulk Power System reliability analysis, then periodic verification will be required for only one numerical value.

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Appendix Appendix –– NERC MODNERC MOD--025025--11R1. The Regional Reliability Organization shall establish and maintain procedures to address verification of generator gross and net Reactive Power capability. These procedures shall include the following:

R1.1. Generating unit exemption criteria including documentation of those units that are exempt from a portion or all of these procedures.R1.5. Information to be reported:

• R1.5.1. Verified maximum gross and net Reactive Power capability (both lagging and leading) at Seasonal Real Power generating capabilities as reported in accordance with Reliability Standard MOD-024 Requirement 1.5.1.

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Appendix Appendix –– NPCC Directory 10NPCC Directory 101.3 Objective

This Directory presents the minimum criteria for verifying the Gross Reactive Power Capability and Net Reactive Power Capability of generators or generating facilities.

Compliance to the criteria set forth in this Directory by each applicable entity assures accuracy of information used in the steady-state models to assess the reliability of the NPCC bulk power system. This directory has been developed to ensure that the requirements specified in NERC Standard MOD-025-1, “Verification of Generator Gross and Net Reactive Power Capability” are met by NPCC and its applicable members responsible for meeting the NERC standards.

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Appendix Appendix –– NPCC Directory 10NPCC Directory 105.3.1.1

If a Transmission Operator determines that only one seasonal generating capability value will suffice for NPCC Bulk Power System reliability analysis, then periodic verification will be required only for that particular season.

5.3.1.2If a Transmission Operator determines that the difference between Gross Reactive Power and Net Reactive Power Capability of a generator or generation facility is insignificant for NPCC Bulk Power System reliability analysis, then periodic verification will be required for only one numerical value.