Update on NERC Event Analysis Process: Joint Guidance Committee Session - June 2012

Steve AshbakerDirector Operations Event Analysis Process update June 1, 2012 Joint Guidance Committee

Event Analysis Update • NERC Event Analysis Process – February 21, 2012 • October 2010- May 2012 – 123 reportable events in WECC • 2010 – 12 Events • 2011 – 93 Events • 2012 – 18 events

Event Analysis Statistics • 87 Category 1 Events • Loss of 3 or more BES elements • 33 Category 2 Events • Complete loss of EMS/SCADA • Loss of entire generating station • Voltage excursion > 10% • Loss of firm load 15 minutes • 2 Category 3 Events • 1 Category 4 Event

WECC Event Causal Factors • Data Failures – 15 • Equipment Failure – 36 • Human Error - 57 • Weather Related – 11 • System Conditions - 4

NERC Event Cause Codes • A1 Design/Engineering Problem • A2 Equipment/Material Problem • A3 Individual Human Performance • A4 Management Problem • A5 Communication • A6 Training Deficiencies • A7 Other Problems

Event Analysis Next Steps • Use NERC CCAP to evaluate events • Use WECC committees to address recurring event trends • OTS/HPWG (events involving human error) • RWG (protection systems/RASRS events) • EMSWG/DEWG (EMS/SCADA events) • OPS (procedural) • PCC Groups (modeling and planning issues)

Event Analysis Reports • WECC using NERC Report Templates • NERC (appendix A)Brief Report Template • Event Analysis Report Template • More detailed explanation of event needed in reports to effectively determine cause code

Steve Ashbaker WECC Staff ashbaker@wecc.biz Questions?

Update on NERC Event Analysis Process: Joint Guidance Committee Session - June 2012

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