7/23/2019 ATP-benchmarks in Electric Power Systems

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29/9/2015 ATP-benchmarks in electric power systems

http://gundam.eei.eng.osaka-u.ac.jp/hseps/sect10/sub1/text.htm

10. Arc dynamics --- power system analyzing with dynamic arc characteristics

10.1 Mayr and Cassie arc modelsPrevi ous Next Conten ts

For circuit-breakers, arc modeling equations introduced by Mayr and Cassie are widely applied. Thescope of them are:Mayr arc model --- Best applicable to small current arc, in the order of less than several ten A in a SF6

gas or air-blast circuit-breaker. Also applicable to post-arc current arc which exists after the current

interruption (current zero) for several s --- called as "thermal mode." A circuit-breaker's performance ina power system, i.e., successful current breaking or not, can be best analyzed applying this arc model,

because the phenomena are mainly related to such time interval. Some minor supplements to the modelequation have been tried by another people.Cassie arc model --- Best applicable to high current arc, in the order of 100A --- 100kA in a SF6 gas or

air-blast circuit-breaker. Transient phenomena by damping effects of a circuit-breaker arc in a powersystem can be analyzed by this model, i.e., the effect of the arc resistance.The outline and the general concepts of these models are shown in the following table.

This page is based on Prof. E.Haginomori's lectures in Tokyo Institute of Technology, and edited byJapanese ATP User Group. Copyright (C) Eiichi Haginomori and Japanese ATP User Group.

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