Eastern, WECC, ERCOT and Quebec Frequency Events’ Data Summary and Corresponding Frequency Plots for March 2015 For: NERC Resources Subcommittee and Frequency Working Group Prepared by: CERTS and Electric Power Group April 16, 2015 Event Color Definition Description: NERC INTERCONNECTIONS MARCH, 2015 FREQUENCY EVENTS – SUMMARY DATA EASTERN Frequency Response can be calculated from NERC SA Actual MW Loss divided by 10* B-A. The results will be in MW/0.1 HZ NERC INTERCONNECTIONS MARCH, 2015 FREQUENCY EVENTS – SUMMARY DATA WESTERN ERCOT QUEBEC Frequency Response can be calculated from NERC SA Actual MW Loss divided by 10* B-A. The results will be in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