Abstract：In power system, insulation faults often occur in air-core power reactor, and they are not easily detected in the early stage by existing methods, which leads to a long-term interturn short circuit of the reactor until it burns down.In this paper, a method to monitor insulation fault in reactor is proposed by calculating the change of loss angle δ in the state of reactor operation and short circuit. A 11kV air-core power reactor is taken as the object of the research, the thin-walled solenoid model is established to calculate the inductance of reactor under working and fault conditions, and various electrical parameters in fault conditions comparing with normal working parameters are calculated. Simulation results show that loss angle δ changes fastest among loss angle δ, equivalent impedance, resistance and other parameters, in case of insulation failure. The variation of electrical parameters will increase with the radius of short circuit turn of reactor. The closer the short-circuit turn position is to the reactor center, the more obvious the numerical change is.
王瀚. 基于损耗角特性监测干式空心电抗器绝缘故障仿真研究[J]. 电气技术, 2019, 20(11): 57-61.
Wang Han. Simulation study on insulation fault monitoring of dry-type air-core reactor based on dielectric loss angle characteristics. Electrical Engineering, 2019, 20(11): 57-61.
2019, Vol. 20 
