永磁同步发电机定子绕组匝间短路故障数学模型及其仿真
Mathematical model and simulation of stator winding inter-turn short circuit fault of PMSG
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摘要: 针对永磁同步发电机定子绕组匝间短路故障问题,在分析PMSG通用数学模型的基础上,引入匝间短路故障因子,推导出三相静止坐标系下的定子绕组匝间短路故障数学模型;然后基于Matlab/Simulink建立了仿真模型,采用时域仿真分析法和FFT分析,研究了PMSG分别在正常和定子A相绕组匝间短路不同严重程度下的运行工况.结果表明:PMSG定子电流的值会随故障严重程度的加剧而增大,只有当定子绕组的短路匝数达到一定数目时,对应的定子电流的幅值变化才会比较明显.Abstract: Aiming at the problem of stator winding inter-turn short circuit fault of permanent magnet synchronous generator(PMSG), the fault factor of inter-turn short circuit was introduced based on the analysis of PMSG general mathematical model, and the mathematical model of stator winding inter-turn short circuit fault in three-phase stationary coordinates was derived. In addition, the simulation model based on Matlab/Simulink was established, and the operating conditions of PMSG normal and stator A phase winding inter-turn short circuit under different severity were studied using time-domain simulation and FFT analysis. Simulation results showed that the stator current would increase with the severity of the stator winding inter-turn short circuit fault of PMSG, and when the stator winding short circuit turned to reach a certain number, corresponding stator current amplitude changes would be more obvious.
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