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FREQUENCY LIMITS R-BC Workshop FREQUENCY LIMITS WECC PWG August 13, 2009.

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Presentation on theme: "FREQUENCY LIMITS R-BC Workshop FREQUENCY LIMITS WECC PWG August 13, 2009."— Presentation transcript:

1 FREQUENCY LIMITS R-BC Workshop FREQUENCY LIMITS WECC PWG August 13, 2009

2 Determining Frequency Limits for WECC First step of UFLS in WECC Determine average frequency-response in WECC Identify Most Severe Single Contingency events Determine the low Minimum Safe Megawatt Deadband for WECC

3 Frequency Observations in WECC

4 Frequency Response in WECC

5 Frequency Limits Frequency Relay Limit High60.5 Hz Frequency Abnormal Limit High60.2 Hz Frequency Trigger Limit High Hz ( Hz) Frequency Trigger Limit Low Hz ( Hz) Frequency Abnormal Limit Low59.8 Hz ( Hz) Frequency Relay Limit Low59.5 Hz

6 CPS1 and BAAL Operating Ranges

7

8 Questions ?


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