基于模糊测度融合诊断的配电网接地故障选线

doi:10.19595/j.cnki.1000-6753.tces.210046

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Abstract The operation and fault conditions of non-effectively grounded distribution networks are complex and variable. It is difficult to effectively cover different fault conditions in the existing distribution network ground fault line selection methods. Especially for high-impedance grounding fault and arc-grounding fault, the criterion based on a single fault characteristic has a high rate of false positives. In this paper, a new method of grounding fault line selection for distribution networks based on fuzzy measures integrated diagnosis is proposed. By means of fuzzy C-means clustering algorithm, the historical characteristic sample sets that characterize the different operating states of the protected lines collected under various operating conditions are divided. A variety of sample similarity measure criteria are used to analyze the degree of similarity between the sample to be tested and the faulty and non-faulty categories to form a fuzzy measure integrated diagnosis matrix, and the matrix is evaluated by the multi-stage judgment indicator system. According to the matrix judgment, the fault characteristics are amplified, the influence of accidental factors on the fault judgment is weakened, and finally the comprehensive judgment matrix is used to accurately identify the fault samples. The results of PSCAD/EMTDC simulation and 10kV true experimental test show that under the influence of non-linear load and other disturbance factors, this method can still accurately capture fault characteristics and correctly identify fault samples under various fault conditions. It has the ability to adapt to changes in the operation mode of different systems, and has strong robustness.

Key words： Distribution network fault line selection fuzzy measures integrated diagnosis judgment indicator system

Received: 12 January 2021

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TM862

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	Articles by authors
	Yu Kun
	Xu Pengbo
	Zeng Xiangjun
	Li Li
	Yang Libin

Cite this article:

Yu Kun,Xu Pengbo,Zeng Xiangjun等. Grounding Fault Line Selection of Distribution Networks Based on Fuzzy Measures Integrated Diagnosis[J]. Transactions of China Electrotechnical Society, 2022, 37(3): 623-633.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210046 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I3/623

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