Fault Location Method for Active Distribution Networks Considering Combination Faults
Zhang Jianlei1,2, Gao Zhanjun1, Chen Ming2, Wei Zhen2, An Shuhuai2
1. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan 250061 China; 2. State Grid Qingdao Power Supply Co. Ltd Qingdao 266000 China
Abstract：Reliable fault location is an important means to improve the power supply reliability of distribution networks after extreme disturbance. In extreme disturbance, the probability of combination fault in distribution networks increases, mainly reflected in the features of high fault multiplicity, multiple fault types and high resistance grounding. In this paper, a fault location method for active distribution networks considering combination faults is proposed. Through the area division based on optimal μPMU configuration, each monitoring area is formed. The suspicious monitoring area is determined by the search algorithm criterion, and the fault location algorithm is started. The fault section detection criterion comparing the amplitude of the unbalanced current component is used to locate the fault. Through PSCAD/EMTDC and Matlab, it is verified that this method is not affected by fault location and fault type, and is suitable for complex scenarios such as combination and multi-type faults. Moreover, it has high resistance against transition resistance.
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2021, Vol. 36 
