Inverter Working Group
Smart Inverter Working Group (SIWG) grew out of a collaboration between the CPUC
and California Energy Commission (CEC) in early 2013 that identified the
development of advanced inverter functionality as an important strategy to
mitigate the impact of high penetrations of distributed energy resources (DERs).The SIWG has pursued development of advanced inverter functionality over
three phases. Phase 1 considered autonomous functions that
all inverter-connected DERs in California will be required to perform.Phase 2 considered the default protocols for communications between IOUs,
DERs, and DER aggregators. Phase 3 is currently considering
additional advanced inverter functionality that may or may not require
more information on the SIWG, please contact Jeffrey Kwan at Jeffrey.Kwan@cpuc.ca.gov .
Thursday, November 17, 2016 - SIWG Workshop on Adoption of Phase 2 and 3 Recommendations
SIWG materials, presentations from the previous workshops and links to the video webcast can be found on the CEC’s
Rule 21 Smart Inverter Working Group website.
Recommendations for Phase 3 Advanced Functions
The SIWG hosted a Phase 3 workshop at CPUC headquarters on September 25, 2015 to
discuss additional advanced inverter functions being considered in Phase 3, and
to discuss coordination issues between the SIWG and related CPUC proceedings
such as the Distribution Resources Plan (R.14-08-013) and the Integrated
Distributed Energy Resources (R.14-10-003) proceedings. The SIWG released its Phase 3 recommendations in March 2016.
Recommendations for Phase 2 Communication Protocols
Smart Inverter Working Group released its Phase 2 recommendations for DER
communication protocols in February 2015. The CPUC Energy Division is currently
working with the IOUs to implement these recommendations in Rule 21, the IOUs’
interconnection technical handbooks, and an IEEE 2030.5 implementation guide.
Recommendations for Phase 1 Autonomous Functions
the Commission adopted seven functions that smart inverters must perform
autonomously. The seven Phase 1 functions will be mandatory for all
interconnecting DERs one year from the approval of UL 1741 Supplement SA.
was informed by the SIWG’s Recommendations
for Updating the Technical Requirements for Inverters in Distributed Energy