RTCA Display for Increased Situational Awareness Presented by Cory Fisher September 2015

Agenda SRP System Model SRP Real Time Sequence (RTS) Current Operator Control Page New Operator Control Page (New Features) Examples (Illustrations of New Control Page) Current Status Questions

SRP System Model EMS Model - 2200 BUSES Voltage Levels - 500kV down to the 12kV Level Neighbors Arizona Public Service Company (APS) Western Area Power Administration (WAPA) Tucson Electric Company (TEP) Full Arizona footprint (BES) with some lower voltage parallel Neighboring Systems (APS) Network Model reaches several Buses into… South California Nevada Utah Colorado New Mexico

SRP REAL TIME SEQUENCE (RTS) RTS Cycles Every 6 seconds. State Estimator Runs every 30 seconds Real-Time-Contingency Analysis runs every 5 minutes Total of 850 Contingencies (and growing) All SRP 69kV to 500kV (N-1) Creditable BES (N-N) Neighbor’s BES Open-End Line Contingencies (Closing Angle Exceedances)

Current Control Page All Results from RTCA for both SRP and Non SRP Contingency are displayed on the same page. No way to sort between SRP and Non SRP exceedances. No way to sort between (N-1) and (N-N) exceedances. Results sorted by severity resulting in all the (N-N) contingency dominating the page.

New Operator Control Page New Features Contingency Categories for: (N-1) and (N-N) SRP Contingencies/SRP Exceedances. Foreign Contingencies/SRP Exceedances. SRP Contingencies/Foreign Exceedances. Foreign Contingencies/Foreign Exceedances. Open-Ended Line Contingencies Load Drop Contingencies

New Operator Control Page New Features (Continued) Power-Flow Solutions Quality Indices. Up And Down Arrows (Indication more items below or above) Minutes since last CA Run (successful run)

New Operator Control Page Status Currently running in Production in parallel with the Old Page. All Shifts have received training on the New Page. Old Page will be turned off by the end of the Month (September).

Questions?