2014 PV Distribution System Modeling Workshop: CA Rule 21 Update: Tom Bialek, Sempra Energy

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2014 PV Distribution System Modeling Workshop CA Rule 21 Update: Tom Bialek, Sempra Energy

Text of 2014 PV Distribution System Modeling Workshop: CA Rule 21 Update: Tom Bialek, Sempra Energy

  • 1.CPUC Rule 21 Update Thomas Bialek, PhD PE Chief Engineer

2. 2 PV Intermittency Mitigation Based Upon Modeling with Smart Inverters With and without dynamic VAr device With and without energy storage With and without storage and 4 quadrant control Red = With Blue = Without P Q -Q -P 3. CES PV Smoothing Operation 3 Units capable of smoothing intermittency caused by fluctuating power output Operational variables can be user-defined i.e. Ramp rate control, time constant -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1:55 PM 2:09 PM 2:24 PM 2:38 PM 2:52 PM 3:07 PM 3:21 PM 3:36 PM Power(kW) Red LineBlue Line 4. 0 300 600 900 1200 275 275.5 276 276.5 277 277.5 278 278.5 279 279.5 Voltage(Volts) 0 50 100 150 200 250 300 350 400 450 -50 -100 -150 -200 RealorReactivePower(kWorkVAr) C598 DVAr Dev ice 05/07/2013 0 Voltage 1 Power 2 Reactiv e Power Installed Dynamic VAr Device 720 780 840 900 960 275.5 276 276.5 277 277.5 278 278.5 279 Voltage(Volts) 0 50 100 150 200 250 300 350 400 450 -50 -100 -150 -200 RealorReactivePower(kWorkVAr) C598 DVAr Dev ice 05/07/2013 0 Voltage 1 Power 2 Reactiv e Power DVAr Off DVAr Off 5. 5 PV with Smart Inverter 6. 6 PV with Smart Inverter 7. 7 Smart Inverter Working Group 8. 8 Smart Inverter Working Group 9. 9 Smart Inverter Working Group 10. 10 Smart Inverter Working Group 11. 11 PV with Smart Inverter 12. 12 WEIL Signatory Page 13. Voltage Regulation Smart Inverters Illustrative Example Operating at different power factor affects voltage magnitude Large Gen at end of a line For an illustrative example operating at a 0.7 power factor can have 2 times the generator rating as one generator operating at unity power factor while maintaining the same voltage $1M for 2 MVA dynamic VAr device $3M for 500 kW, 1500 kW battery $1M/mile for re-conductoring 14. Summary Diversity of load increases moving to the system level System was designed to accommodate one way power flow - Voltage regulation impacted by loading and DG PV and PEV have significant impact on the grid - New approaches are required to mitigate intermittency - NEM customers do not pay - Smart inverters are a necessary tool to traditional alternatives - Need to change PUC and Rules - Storage provides maximum flexibility - Can operate as a generator or a load at any power factor 15. 15 Questions ? Thank you. Thomas Bialek Chief Engineer tbialek@semprautilities.com www.sdge.com/smartgrid/