Zero-sequence current detection method of distribution network based on AMR bidirectional array
1. College of Energy and Mechanical Engineering， Shanghai University of Electric Power, Shanghai 200090, China； 2. Shanghai Institute of Microsystem and Information Technology， Chinese Academy of Sciences， Shanghai 200050, China
Abstract：When single-phase grounding fault occurs in distribution network, the fault current information cannot be collected accurately by existing devices due to the small fault current. Therefore, a zero-sequence current detection scheme for compensating electromagnetic interference was proposed to improve the measurement accuracy of zero-sequence current.Three AMR bidirectional array current sensors were used to synthesize zero-sequence current.The mathematical model of measuring current was established, and the location of sensor array was determined by Matlab numerical simulation to propose a zero-sequence current measurement scheme.The simulation model of 10 kV small current grounding system was established by Simulink, and the zero-sequence current measurement error of the scheme was analyzed.The proposed scheme was verified by comparing the experimental data of different schemes. The theoretical analysis and simulation results show that the proposed method can detect zero-sequence current effectively and accurately.
刘育东1， 李芳芹1， 任建兴1， 李伟1,2. 基于AMR双向阵列的配电网零序电流检测方法[J]. 江苏大学学报（自然科学版）, 2022, 43(6): 673-679.
LIU Yudong1， LI Fangqin1， REN Jianxing1， LI Wei1,2. Zero-sequence current detection method of distribution network based on AMR bidirectional array[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2022, 43(6): 673-679.
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2022, Vol. 43 
