The California Solar Initiative's RD&D Program has now concluded after operating since 2008 through 2016. All solicitations and research projects are now complete.



 Program overview + Research briefs       

 [25 MB ]
 Program overview  [13 MB ]

 Research briefs  (high resolution)                     

 [44 MB ]

For more information on the research projects and resulting reports please review the section below. All completed final reports are also available separately for review and download. 

FINAL REPORTS for completed projects along with individual research briefs can be found here.


CSI RD&D Program - Program Evaluation 



 Report Summary       

 [277 KB ]
 Final Report  [3 MB ]


 [4 MB ]


Funded Projects

This is a database of projects funded by the CSI RD&D. The project summaries are listed alphabetically below. You may also choose a subset of projects by clicking a keyword, or using the search function.

Quantification of Risk of Unintended Islanding & Re-Assessment of Interconnection Reqs in High-Penetration of Customer-Sited Distributed PV Generation

Current Highlights:

FINAL PROJECT REPORT. August 2016.  [PDF]  (2 MB)

Jul 22, 2015

  • Final project webinar slide deck [PDF]
  • Webinar recording [WMV]

Project Information

Solicitation: Solicitation 3
Target Area: Grid Integration
Awardee: GE International-Energy Consulting

Pacific Gas and Electric

CSI Funding: $629,100
Match Funding: $632,700
Start Date: July 2012
End Date: July 2015
Status: Complete

Contact Information

Principal Investigator Name: Jovan Bebic
Principal Investigator Email: bebic @ ge.com
Principal Investigator Phone: 518-385-1951
Grant Manager Name: William Marin
Grant Manager Email: william.marin @ itron.com
Grant Manager Phone: 509-891-3193

Project Summary

This collaborative project between General Electric (GE) and Pacific Gas and Electric (PG&E) will quantify the risks of unintended islanding in distribution circuits with high penetration of customer-sited distributed PV generation. The GE/PG&E team will use full-scale laboratory testing to determine the risks to both utility and customer equipment that may result from an unintended islanding situation. Additionally, the team will review PG&E's interconnection requirements with respect to islanding and provide recommendations on potential changes based on the findings from this project. The results of this research will inform PG&E's interconnection requirements and also will be of value to the other utilities (both investor-owned and publicly-owned). This research can also inform the CPUC in making decisions regarding interconnection requirements relating to anti-islanding operations of PV inverters (Rule 21).
Specifically, this project will:

  • Quantify the probability that, in the event a feeder or portion of a feeder is tripped, islanding does occur.

  • Use comprehensive full-scale laboratory testing to ascertain the extent of time that an island will persist in an energized state and the risks to utility and customer equipment that may result from an unintended islanding situation.

  • Review the interconnection requirements at PG&E with respect to islanding and provide recommendations in line with the findings from this project.

Deliverables and Documents


  • Final Project Report – Quantification of Risk of Unintended Islanding and Re-Assessment of Interconnection Requirements in High Penetration of Customer Sited PV Generation. GE Energy Consulting and Pacific Gas and Electric. Bebic, J. and Sun, C. August 2016.  PDF (2 MB)
  • Task 3 Report: Aggregate PV Inverter Islanding Performance Testing. GE Energy Consulting and Pacific Gas and Electric. Bebic, J., Eberwein, A. Ver. 1.01. July 5, 2016.  PDF (2 MB)

  • Task 2 Report: Statistical Analysis of PV Generation and Load Balance. GE Energy Consulting and Pacific Gas and Electric. Bebic, J., Schmitt1, W., Sun, C., and Huynh, T. Ver. 1.4. January 20, 2015. PDF (7 MB)


Initial Project Presentation. Aug 9, 2012. PDF

Final project webinar presentation slides [PDF]

Final webinar recording



Supporting Files For:Task 3 Report: Aggregate PV Inverter Islanding Performance Testing

The following support files are included as attachments to the Task 3 Report:  ZIP FILES  (68 KB)

RSCAD files used in the RTDS load model:
a. VinIinGTAI_IoutGTAO_V6b.dft – the RSCAD model file
b. VinIinGTAI_IoutGTAO_V6b.sib – the RSCAD user interface screen

Example TestLog files showing sample output from the inverter tests:
a. TestLog20150417.xslsx, TestLog20150418.xlsx – intrinsic behavior of groups of inverters on passive RLC loads
b. TestLogSummer01.xlsx – Amplifier tests for the most common Summer load mix, 4 groups of tests for distinct values of power factor, 5 levels of PV penetration within each group.

Project Activities

July 5, 2012 Project started
July, 2015 Project completion

Project Links

Tags: Interconnection