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Approval of Important Station Voltages for State Estimator Reporting

Approval of Important Station Voltages for State Estimator Reporting. Thinesh Devadhas Mohanadhas Advanced Network Applications 10/11/12. Objective. Approval of Important Buses as defined by the TAC-approved State Estimator Standards

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Approval of Important Station Voltages for State Estimator Reporting

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  1. Approval of Important Station Voltages for State Estimator Reporting Thinesh Devadhas Mohanadhas Advanced Network Applications 10/11/12

  2. Objective • Approval of Important Buses as defined by the TAC-approved State Estimator Standards • “On 20 most important station voltages designated by ERCOT and approved by ROS each October; the telemetered voltage minus State Estimator voltage shall be within 2% of the telemetered voltage measurement involved for at least 95% of samples measured during a 1 month period.”

  3. Important Station Voltages • Defines key buses to be monitored to ensure State Estimator accuracy • To be reviewed by the Network Data Support Working Group and approved by ROS

  4. Determination of Important Buses • Major criteria for inclusion in important station voltage list: • Nuclear plant buses • Black Start synchronization point-related buses • IROL associated buses • Zonal CSC/CRE related buses • 345KV stations with large power transfers

  5. Bus List

  6. Bus List on Texas Map with 345 Lines Added – Th Wharton, Ph Robinson Removed – Bellaire, Norwood Switch

  7. Conclusion • ERCOT SE report will monitor the telemetry vs. SE bus KV for the approved buses

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