Study on Fault Characteristics of Layer Short Circuit of Dry-Type Air-Core Series Reactor

Aiming at the layer short circuit fault of dry-type air-core series reactor winding, in order to reveal the characteristics of electrical parameters when the fault occurs and improve the accuracy of online detection, this paper uses ANSYS Maxwell software to study the changes of electrical parameters when the layer short circuit fault occurs in dry-type air-core series reactor. The changes of equivalent resistance, equivalent reactance, and power factor are simulated and analyzed when the layer short circuit fault occurs in normal operation and different positions of winding. The simulation results show that with the different locations of layer short circuit fault points, the variation laws of electrical parameters of reactors are also different, in which the variation amplitude of power factor is obvious and the variation trend is consistent, which can provide important theoretical support for the online detection and protection of layer short circuit fault of dry-type air-core series reactors.