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Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Experience with accumulated phase angle drift measurement for islanding detection

An, Chang and Millar, Gordon and Lloyd, Graeme and Dysko, Adam and Burt, Graeme and Malone, Fergus (2012) Experience with accumulated phase angle drift measurement for islanding detection. In: 11th international conference on developments in power systems protection, 2012. DPSP 2012. IEEE, New York. ISBN 9781849196208

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Distributed generation is increasingly likely to play a major role in electricity supply systems as recognition is made of its low carbon credentials. However, the integration of these units at distribution voltages is a major challenge for utilities. One particular issue is that generators may, unintentionally, continue to supply local demand when areas of the network are isolated from the main system. Reliably detecting this condition is regarded by many as an ongoing challenge as existing methods are not entirely satisfactory. This paper proposes a novel method based on accumulated phase angle drift that provides inherently enhanced stability without unduly sacrificing sensitivity. It is passive and thus requires no additional invasive hardware. Transient simulations have been used to demonstrate its performance [1]. The current paper presents further validation of the PAD method performance resulting from the field trial of a relay connected on the 38kV network at the interface to a 25MW windfarm in Ireland and also supplemented by the results of an on-going laboratory trial at the University of Strathclyde (UoS).