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Protection system performance analysis using dynamic modeling methods

Dysko, A. and Booth, C.D. and McDonald, J.R. and Carter, A. (2001) Protection system performance analysis using dynamic modeling methods. IEEE Power Engineering Review, 21 (5). pp. 54-55. ISSN 0272-1724

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Abstract

This letter presents a simulation-based case study that indicates the need for accurate dynamic modeling of protection systems. In many cases, a static analysis based on current and voltage phasors may be sufficient to assess the performance of protection systems. There are several circumstances under which such a simplified study does not provide the depth of analysis necessary to obtain accurate results, however. This letter presents a study of the influence of transformer magnetizing inrush current on the performance of different types of distance protection relays. Three types of distance relays have been investigated: Micromho, THR, and REL 100. The studies have been performed in order to demonstrate the difference in responses to the same event when detailed dynamic models of protection relays are utilized.