The overall objective of Task 5, which was concluded in 2002, was to develop and verify technical requirements which will serve as the technical guidelines for grid interconnection with building integrated and other dispersed power systems. The development of these technical requirements include safety and reliable linkage to the electric grid at the lowest possible cost. The systems considered will be those connected with a low-voltage grid, which are typically of a size between one and fifty peak kilowatts. Its deliverables are associated in four categories:

• Review of previously installed PV experiences
  On the bases of four different surveys - Existing Guidelines, Distributions Systems, Interconnection Equipment and PV Experience, four reports on the same topics were produced.
• Definition of guidelines to be demonstrated
  A report was issued collecting the results of the 11 important topics for grid interconnection of PV systems: Harmonics, AC-Module, Multiple inverters and AC grid, Grounding of equipment in PV systems, Ground-fault detection and array disable for PV systems, Overvoltage protection, Islanding, Electro-magnetic compatibility (EMC) of inverter, External disconnect, Re-closing and Isolation transformer and DC injection.
• Demonstration test using Rokko Island
  A report on demonstration tests using Rokko Island concerning harmonics distortion, islanding, PV output variation, DC injection etc. was produced.
• Highly concentrated penetration of grid interconnected PV systems
  This additional survey started from 1999. Reporting of PV system grid-interconnection technology, research on islanding probability and detection method, performance of high penetrated PV systems and evaluation of capacity of the PV systems have been investigated

The latest findings of the Task 5 activities were presented at the workshop "Impacts of PV Penetration in Distribution Networks" held on 24 and 25 January 2002.

Task 5 status reports can be found in the annual reports of the IEA  PVPS Programme:

• Annual report 2003 includes the Task 5 status report by the end of 2003
• Annual report 2002 includes the Task 5 status report by the end of 2002
• Annual report 2001 includes the Task 5 status report by the end of 2001

Publications

• Grid-connected photovoltaic power systems: survey of inverter and related protection equipments 
• Probability of islanding in utility networks due to grid-connected photovoltaic power systems, September 2002 
• Evaluation of islanding detection methods for photovoltaic utility-interactive power systems, March 2002 
• Risk analysis of islanding of photovoltaic power systems within low voltage distribution networks, March 2002 
• Grid-connected photovoltaic power systems: Power value and capacity value of PV systems, February 2002 
• Impacts of power penetration from photovoltaic power systems in distribution networks, February 2002 
• International guideline for the certification of photovoltaic system components and grid-connected systems, February 2002 
• PV System Installation and Grid-Interconnection Guidelines in Selected IEA countries, November 2001 
• Grid-connected photovoltaic power systems: Summary of IEA/PVPS Task V activities from 1993 to 1998, March 1999 
• Demonstration test results for grid interconnected photovoltaic power systems, March 1999 
• Utility aspects of grid-connected photovoltaic power systems, December 1998 
• Information on electrical distribution systems in related IEA countries, July 1996
• Grid-connected photovoltaic power systems: Status of existing guidelines and regulations in selected IEA member countries, July 1996

Besides, Task 5 organized an international workshop, which resulted in:

• Proceedings of the International IEA Workshop on Existing and Future Rules and Safety Guidelines for Grid Interconnection of Photovoltaic Systems, Zurich, 15-16 September 1997

In case you are interested and want to order one or more of these publications, please contact your national participant of Task 5 or the operating agent of Task 5.
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Information

• Mr. Tadashi Kanbayashi - Operating Agent
  New Energy Promotion Dept. NEDO
  Sunshine 60-28th F1
  1-1, 3-chome Higashi-Ikebukuro
  JPN - Toshima-ku, Tokyo, 170-6028
  JAPAN
  Tel.: +81-3 39 87 93 67
  Fax: +81-3 35 90 58 03
  E-mail: kanbayashitds@nedo.go.jp
  Web: http://www.nedo.go.jp
• Mr Tadao Ishikawa - Task 5 Chairman
  CRIEPI
  2-11-1 Iwato-kita Komea-shi
  JPN - 2018511, Tokyo
  Tel.: +81 33 48 02 11 1
  Fax: +81 33 43 04 01 4
  E-mail: ishikawa@criepi.denken.or.jp
  

You can also contact one of the former national participants of Task 5: Australia, Austria, Denmark, Germany, Italy, Japan, the Netherlands, Portugal, Switzerland, United Kingdom and the United States of America.
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