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Product Abstract

Distribution Volt/Var Control to Optimize Customer Voltage Profiles at Southern California Edison: Irvine Smart Grid Demonstration

Product ID:3002004612
Date Published:05-May-2015
Sector Name:Power Delivery & Utilization - Distribution & Utilization
Document Type:Technical Results

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This Southern California Edison (SCE) case study for the EPRI Smart Grid Demonstration Initiative describes the use of distribution volt/var control (DVVC) to optimize customer voltage profiles and save customers energy. Southern California Edison currently uses technology that was developed many years ago to maintain customer voltage within the lower half of the required customer voltage range, as designated in the American National Standards Institute (ANSI) C84 standard and California requirements (114 to 120 volts at the customer service connection). This project demonstrated an updated approach to maintaining customer voltage using a new control algorithm.

The new DVVC algorithm was developed using SCE’s patented volt/var algorithm from its previous Distribution Capacitor Automation Project (D-CAP), which was initiated in 1992. The key to successful capacitor automation is to implement a smart centralized control algorithm that uses primary circuit voltage as well as watt and var measurements at the substation to operate substation and field capacitors. The new DVVC algorithm solves for the optimal system capacitor switching combination that will satisfy user-defined constraints for minimum and maximum voltage and reactive power flow. Actual customer voltages provided by Edison SmartConnect™ meters were used to verify system performance.

2015 Program D_SG   Smart Grid Demonstration
  • Southern California Edison
  • Smart grid
  • Conservation voltage reduction (CVR)
  • Capacitor switching
  • Irvine Smart Grid Demonstration
  • Volt/var optimization (VVO)

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