新型同步调相机转子匝间短路故障定位研究

转子绕组匝间短路故障是新型同步调相机的一种典型故障，对调相机长期运行和电网稳定都有严重影响，为保障新型同步调相机高可靠稳定运行，文中提出了一种转子绕组匝间短路故障在线诊断与定位的方法。文中从故障导致的气隙磁场磁动势畸变出发，推导出定子同相双支路将产生偶次谐波环流现象，通过对支路环流进行傅里叶分析，提取谐波中的明显特征量。通过对此特征量进行分析，文中得出该特征量的大小仅与故障所在转子上的空间位置有关，而与故障匝数无关的结论，最终通过查表的方式来实现故障诊断与定位。文中基于已规模投入使用的TTS-300-2型新型同步调相机开发了有限元软件的仿真模型，搭建了基于新型调相机的模拟机实验平台。仿真与实验的的结果验证了利用支路环流谐波进行转子匝间短路故障定位的有效性。

Research on fault location of rotor inter-turn short circuit of new synchronous condenser

The inter-turn short circuit fault of wingding is a typical serious fault of the condenser, which has a serious impact on the long-term operation of the condenser and the stability of the power grid. In order to ensure the reliable and stable operation of the new synchronous condenser, a method of online diagnosis and location of rotor inter-turn short circuit fault is proposed in this paper. Based on the distortion of the air-gap magnetic field magnetomotive force after the fault, the paper deduces that the phenomenon of even harmonic circulation will occur in the same phase and double branches of the stator. Through fourier analysis of the branch circulation, the paper concludes that the obvious characteristic quantity is only related to the spatial position of the rotor where the fault is located, and is not related to the number of fault turns. Therefore, this characteristic quantity can help realize fault diagnosis and location. Based on the TTS-300-2 type synchronous condenser which has been put into use on a large scale, a simulation model is established for the actual condenser while an experiment platform is developed for a condenser simulator. The simulation and experimental results validate the effectiveness of locating rotor inter turn short circuit faults through branch circulating current harmonics.