电力系统保护与控制Issue(13)：92-99,8.
风电场35 kV电缆网络中性点接地方式研究
Study on neutral grounding modes of 35 kV cable networks in wind farm
摘要
Abstract
To study the applicability and feasibility of wind farm 35 kV cable networks neutral grounding methods, and aiming at larger capacitive current to ground level in cable networks, the simulation is made by using MATLAB/Simulink software. This paper takes Long-li wind farm as engineering background and gives operational characteristics under different neutral grounding ways. A modified operation mode based on arc suppression coil is proposed for wind farm 35 kV cable networks. When single-phase grounding fault occurs and the grounding capacitive current is less than 100 A, the medium resistance is switched to suppress the transient over-voltage in the initial period of the fault, the transient grounding fault can be extinguished by compensating arc suppression coil while non-transient grounding fault can be solved through zero sequence current protection. For the case of grounding capacitive current greater than 100 A, the zero sequence current protection device is started by inputting a low resistance to remove non-transient grounding fault timely. Simulation results show that the improved method is adaptable and the related equipment can be selected in accordance with the relevant insulation levels, which has a high operability.关键词
风电场/电缆网络/中性点/电容电流/Matlab/SimulinkKey words
wind farm/cable networks/neutral point/capacitive current/Matlab/Simulink分类
信息技术与安全科学引用本文复制引用
刘渝根,许晓艳,马晋佩,谢丽娜..风电场35 kV电缆网络中性点接地方式研究[J].电力系统保护与控制,2015,(13):92-99,8.基金项目
国家创新研究群体基金资助(51021005) （51021005）
