干式空心电抗器匝间短路故障暂态特性仿真研究

从理论上分析了干式空心电抗器从正常运行状态到匝间短路故障状态下的匝间短路动态过程,建立了暂态电路耦合计算模型,并利用ANSYS Maxwell软件模拟了匝间短路故障的暂态特性,提出了通过安装在电抗器封装上的检测线圈实现对电抗器短路位置引起的磁场突然变化的检测方法。通过实验研究表明,采用本文提出的方法可以在较早的故障期间检测到匝间短路故障。

Simulation Research on Transient Behavior of Turn-to-Turn Short Circuit Fault of Dry-Type Air-Core Reactor

This paper firstly analyzes the dynamic process of inter-turn short circuit that occurs when a normal dry-type air-core reactor falls into the inter-turn short circuit fault condition. Then, the transient circuit coupling calculation model is established and the transient features of inter-turn short circuit are simulated by using ANSYS Maxwell software. Next, a method is proposed to detect the sudden changes of the magnetic field caused by short circuit of the reactor.The experiments show that the faults in the inter-turn short circuit can be detected earlier using the method proposed in this paper.