Smart Inverter Working Group

The 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 communications.

For more information on the SIWG, please contact Jose Aliaga-Caro at jose.aliaga-caro@cpuc.ca.gov

 

	Capability Required by:	Requirement Detailed in:
Phase 1 Autonomous Functions	September 8, 2017	Section Hh of Electric Tariff Rule 21 (Links to each utility’s Rule 21 can be found here).
Phase 2 Communication Protocols	March 22, 2020	Section Hh of Electric Tariff Rule 21 (Links to each utility’s Rule 21 can be found here).
Phase 3 Advanced Functions	Functions 5/6 - February 22, 2019  Functions 1,2,3 and 8 - March 22, 2020  Functions 4 and 7 - TBD	SIWG recommendations on Phase 3 can be found here.

 

Recent Meetings

June 18, 2020: D.2006017 Implementation

Decision (D.)2006017 within the CPUC’s Microgrids Rulemaking (R.)1909009, approved on 6/11, orders that the investor-owned utilities (IOUs) work with the SIWG to determine technical implementation details of various proposals. In this meeting, we discussed the implementation of the recent Decision’s Ordering Paragraphs (OP) 1, which relates to the development of single line diagrams for template-based interconnection, and OP 5, which allows energy storage systems that are interconnected under the condition that they charge from solar to temporarily import from the grid ahead of an upcoming Public Safety Power Shutoff (PSPS) event.

• R21 Template SLDs - PG&E
• R21 Template SLDs - SCE
• 06182020 SIWG Slides

June 25, 2020: D.2006017 Implementation (cont.)

• NEM Pre-PSPS Charging 06-25-20  

July 23, 2020: Harmonization of Rule 21 with IEEE 1547-2018 and 1547.1-2020 (Overview)

• 07232020 SIWG Deck

August 6, 2020: Development of Rule 21 Cybersecurity Requirements

• 08062020 SIWG Deck
  

August 20, 2020:  IEEE 1547.1-2020 Section 1

• 08202020 SIWG Deck
  

September 3, 2020:  Development of Rule 21 Cybersecurity

•  09032020 SIWG Deck 

September 17, 2020:  IEEE 1547.1-2020 Section 5

• 09172020 SIWG Deck

October 1, 2020:  IEEE 1547.1-2020 Section 5 (cont.) and Section 6

• 10012020 SIWG Deck

October 15, 2020:  IOU Presentation of Proposed Outline of Cybersecurity Requirements Guide  

• 10152020 SIWG Deck

October 29, 2020:  IEEE 1547-2018 Section 6 Discussion

• 10292020 SIWG Deck

November 12, 2020: IEEE 1547-2018 Section 6 Discussion (cont.)

• 11122020 SIWG Deck

November 19, 2020: Utility Cybersecurity Requirement Guide Topic 1: Document Overview

• 11192020 SIWG Deck
• The draft Utility Cybersecurity Requirement Guide will be made available for peer review after the completion of all sections.  This process will commence in May of 2021.  If you would like to be a part of the peer review process, please reach out to Danielle Weizman at dweizman@sdge.com.

December 3, 2020: IEEE 1547-2018 Sections 4 and 6

• 12032020 SIWG Deck

December 17, 2020: IEEE 1547-2018 Sections 4 and 6 (cont.)

• 12172020 SIWG Deck

January 7, 2021: IEEE 1547-2018 Clause 4 continuation, Clauses 7, 8, 9, 10 and 11 Discussion

• 01072021_SIWG_Deck

January 14, 2021: IEEE 1547-2018 Clause 4, 10, and 11 Discussion

• 01142021_SIWG_Deck

January 21, 2021: IEEE 1547-2018 Clause 10 Discussion

• 01212021 SIWG Deck

February 4, 2021: Utility Cybersecurity Requirement Guide Topic 2: Communication and Concepts

• 01212021 SIWG Deck
• The draft Utility Cybersecurity Requirement Guide will be made available for peer review after the completion of all sections. This process will commence in May of 2021. If you would like to be a part of the peer review process, please reach out to Danielle Weizman at dweizman@sdge.com. 

Upcoming Meetings

IEEE 1574.1-2020 was published May 21, 2020, and its release triggers significant efforts on the part of the SIWG in the areas of both requirement harmonization and cybersecurity.  The CPUC invites you to participate in a series of SIWG biweekly calls to address these issues.  Additional topics may be proposed and discussed.  Regular calls take place between 1 and 2:30 PM PST on alternating Thursdays.

Please contact Sophie Meyer at sophie.meyer@cpuc.ca.gov for meeting details.

SIWG History

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.

SIWG Recommendations for Phase 3 Advanced Functions

The SIWG released it updated Phase 3 Recommendations in March 2017.  Previousely, the SIWG hosted webinar meetings to develop these recommendations as well as discuss coordination issues between the SIWG,  related CPUC proceeding and relevant organizations (California Energy Commission, Institute of Electronic and Electrical Engineers (IEEE), Underwriters Laboratory, etc.).

SIWG Recommendations for Phase 2 Communication Protocols

The SIWG released its Phase 2 Recommendations for Utility Communications with Distributed Energy Resources (DER)Systems with Smart Inverters in February 2015. The IOUs submitted Rule 21 tariff revisions incorporating the Phase 2 recommendations on December 20, 2016.  The Commission's Energy Division subsequently approved the revisions.  The implementation of the recommendations is available through each utility's Rule 21, interconnection technical handbook, and an IEEE 2030.5 Common Smart Inverter Profile (CSIP) Implementation guide.

SIWG Recommendations for Phase 1 Autonomous Functions

In D.14-12-035, the Commission adopted seven functions that smart inverters must perform autonomously. The seven Phase 1 functions will be mandatory for all interconnecting DERs on September 8, 2017.   D14-12-035 was informed by the SIWG's Recommendations for Updating the Technical Requirements for Inverters in Distributed Energy Resources document. 

Petition for Modification of Resolutions E-4898 and E-4832

On February 11, 2019, CALSSA submitted the Petition of the California Solar & Storage Association for Modification of Resolution E-4832 and Resolution E-4898 to the CPUC Energy Division.  This Petition addresses the Smart Inverter Phase 2 communications requirments and Functions 1 (Monitor Key DER Data) and 8 (Scheduling Power Values and Modes) of Smart Inverter Phase 3.  More information and links to the Petition and associated resources can be found here.  The Commission addressed CALSSA's Petition for Modification in Resolution E-5000, which was adopted on July 11, 2019.