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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

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2014 PV Distribution System Modeling Workshop …

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


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  • 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/