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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Quantitative analysis of network protection blinding for systems incorporating distributed generation

Coffele, Federico and Booth, Campbell and Dysko, Adam and Burt, Graeme (2012) Quantitative analysis of network protection blinding for systems incorporating distributed generation. IET Generation, Transmission and Distribution, 6 (12). 1218 - 1224. ISSN 1751-8687

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Abstract

Increased penetration of distributed generation (DG) will impact on power network protection systems. Many publications present solutions to protection problems such as blinding, false tripping and loss of grading for networks incorporating DG, but neglect to fully quantify and demonstrate the problems that are being addressed. This study fills a gap in the understanding of the particular problem of protection blinding through presenting a detailed study of the impact of DG on overcurrent protection using a typical UK rural distribution network. This study considers all relevant factors, such as: fault level, DG penetration level, DG location, DG technology, fault type, fault location and fault resistance. The main emphasis and value of this study is in the use of justified and realistic network data, fault (including arc fault) models, utility protection settings policies, real-time simulation and actual protection relays (employed as hardware in the loop), all of which enhance the credibility and validity of the reported findings. The simulations quantify when blinding can occur and demonstrate that, for phase faults, DG is very unlikely to cause blinding, whereas for earth faults (EFs), DG actually increases the sensitivity of EF protection.