基于参数辨识的消弧线圈接地电网单相接地故障测

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Abstract To deal with the fault locating problem against single-phase-to-ground fault in arc-suppression-coil earthed power distribution systems,a fault locating algorithm is presented for single-phase-to-ground fault in arc-suppression-coil earthed power distribution systems based on parameter estimation principle.By regarding the full-wave zero-sequence equivalent circuit as the estimation model and treating the fault distance,fault resistance and zero-sequence capacitance as the unknown parameters,the objective function of parameter estimation can be established according to the fault voltages and currents.The least-square estimation method is used to obtain the optimal parameters.So the distance between the fault location and the bus side can be obtained.In addition,considering branches likely existed in the distribution lines,deductive logics are constructed as the complement for the basic fault location method to improve the applicability of the method.The presented algorithm can be integrated in the fault selection device to implement the dual function without extra equipment.Simulations and experiments are conducted to verify the feasibility and accuracy of the proposed method.

Key words： Arc-suppression-coil earthed power distribution systems single-phase-to-ground fault fault location zero-sequence full waveform equivalent circuit least-square parameter estimation

Received: 16 July 2015 Published: 26 December 2016

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	Jia Qingquan
	Wang Zhenyu
	Wang Ning
	Dong Haiyan
	Ai Li

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Jia Qingquan,Wang Zhenyu,Wang Ning等. A Single-Phase-to-Ground Fault Locating Algorithm for Arc-Suppression-Coil Earthed Power Distribution Systems Based on Parameter Estimation[J]. Transactions of China Electrotechnical Society, 2016, 31(23): 77-85.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I23/77

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