Grid Modernization at SDG&E

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1 Grid Modernization at SDG&E Ali Yari Director, Electric Grid Operations 2017 San Diego Gas & Electric Company. All copyright and trademark rights reserved.

2 SDG&E Service Territory Subsidiary of Sempra Energy Regulated public utility Safe and reliable energy service for 3.6 million consumers 1.4 million electric meters 873,000 natural gas meters 4,100 square-mile service territory in San Diego and southern Orange Counties (25 cities) 1,800 miles of electric transmission lines and 21,600 miles of electric distribution lines 4,300 employees Named Best in the West for electric reliability for twelve years in a row San Francisco SDG&E SoCal Gas Los Angeles San Diego 2

3 2018 SDG&E System Overview San Onofre SCE system (LA) San Luis Rey Encina 840 MW Talega Palomar 565 MW QFs 165 MW* Peakers 558 MW* GTs 67 MW* Renewables 75 MW* Battery Storage 37 MW Suncrest Miguel Ocotillo *NQC Numbers **Numbers are Max Gen Capacity and include generation connected to Ocotillo and ECO and Boulevard Does not Includes Pio Pico Pio Pico 336 MW Tijuana Otay Mesa 603 MW Path MW (S N) 408 MW (N S) CENACE system (Mexico) ECO La Rosita ~ APS system (Arizona) Imperial Valley Area** Comb. Cycle: 959 MW Renews: 1368 MW 3

4 Overview Over the past 10 years SDG&E has significantly improved their reliability and response capabilities within their Transmission operations with the integration of synchrophasor data for improved wide area situational awareness. (WASA) SDG&E is now focused on integrating real-time collection of synchrophasor data as well as visualization and operator interface systems to aid in real-time systems operations. 4

5 Challenges Facing SDG&E: Renewable Integration

6 Benefits Provide improved situational awareness to operators Compute critical angle differences in real time Compute and display grid oscillations and disturbances Evaluate new event detection and system modeling technology 6

7 WASA System Deployment A Critical Part of SDG&E s Smart Grid Deployment Plan Objective Deploy a suite of tools by 2020 for use by Grid Operators, Engineering, and Operations Managers to improve overall wide-area situational awareness of SDG&E s transmission system Goals Full integration of synchrophasor technology into transmission system real-time operations Provide new Wide Area Situational Awareness capabilities and new ways to take advantage of synchrophasor data and applications Facilitate exchange of synchrophasor data with Peak RC, CAISO and neighboring utilities

8 WASA Operational Benefits Real-Time Operations Ensure Reliability and Safety of Electric Grid Digital Information System (Video Wall) Technology System-wide information, refreshed at a high report rate Key Steps: Consider value synchrophasor technology provides in the Operations Horizon Develop operational use cases with operations personnel to define how PMU data and synchrophasor application outputs can be used in the control room

9 SCADA vs. PMU Voltage and Current Comparing full stream sub-second PMU measurements with SCADA data. This data was captured during the testing of new generator control settings that caused unit output to swing rapidly for approx. 30 seconds and resulted in small scale voltage 9 oscillations on the 138 kv system.

10 Orange County System Voltage Oscillation Detection Customer reported issues were not seen by traditional EMS Display showing most recent detected disturbances, the list is updated in real-time. Event :18:20 PM 5/30/ Locations Detected Disturbance Top 4 Locations: Impact TA 15 SO 07 SA 05 EA 03 Jump to Event Time Save to Snapshots Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date Event Date SEL Confidential Copyright SEL, SDG&E, 2016

11 Solar Oscillation Detection List of Detected Disturbances SPACE notified Grid Ops and the Solar Operator corrected their equipment Copyright SEL, SDG&E, 2016

12 IV-NG Intertie Closing Angle Synchrophasor measurement displays angle delta on deenergized line

13 Phased Deployment Approach Pilot Set up initial infrastructure Send data to Peak RC and CAISO Evaluate application software for operation use WASA system Phase 1 (WASA 1) Deploy a system with best in the class commercial off-the-shelf products at the time Enable the use of the synchrophasor data in real-time and non-real-time operations within deployed product capabilities WASA system Phase 2 (WASA 2) Deploy a WASA system that fully meets SDG&E business requirements Establish a solid foundation for future expansion and enhancement Pilot WASA 1 WASA 2

14 WASA 1 Status Infrastructure 100+ PMUs in 25 substations 71 delivering data to Peak RC and CAISO > 99.9% availability < 3 second latency 31 substation PDCs 25 not sending data yet except for the 6 located in MCC Data/Control centers WASA system Available now SynchroWAVe Central Realtime PGDA Non-real-time Available in early 2018 GIS dashboard Near realtime Developed by SDG&E IT in consultation with Grid Operations Incorporate Esri ArcGIS, OSISoft PI Synchrophasor Data, and System & Substation One-Line Diagrams

15 Vision - Situational Awareness

16 WASA 1 Complete

17 Prior Control Room SDG&E Control Room (In Demolition)

18 Reminder of our Research Site Visits

19 SDG&E has all 500kV & 230kV Systems Covered