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Automatic Under-Frequency Load Shedding (AUFLS) Review

Background | Technical Review and Survey | Timetable | Related Information

Background

The System Operator is undertaking a review of the Automatic Under-Frequency Load Shedding (AUFLS) System during 2010.  This page will be used as a primary means to keep interested parties informed of progress.  Subscribe to the Market Section of our web site to be kept informed on this project.

Technical Review and Survey

The first report from the AUFLS Review is complete and is being prepared for an external peer review. The external review is expected to take 1 month, we expect to be able to publish the report after the next set of SO workshops.  The report details the findings from the technical studies and survey work, and covers the following areas:

  • The purpose of the AUFLS
  • A history of AUFLS in New Zealand
  • A comparison of international reserve requirements and AUFLS settings
  • Literature review - main findings from international under-frequency events and the use of AUFLS
  • Results from the technical studies including the performance of the existing AUFLS scheme
  • Options and next steps

Timetable

Indicative timetable as at May 2010

Related Information

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Automatic Under Frequency Load Shedding Review Scope (Final) [163kB]

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SO submission on AUFLS consultation paper [100kB]

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Letter to EC Development of AUFLS 29 June 2009 [50kB]

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Letter to EC Development of AUFLS 13 August 2009 [50kB]