基于Matlab建立仿真分析确认定子接地故障点

Establish Simulation Analysis Based on MATLAB to Confirm the Stator Ground Fault Point

对于发电厂定子接地故障,通过Matlab建立数学模型模拟发电机单相接地故障,根据一个发电厂接地故障的电流电压波形与相关数据,模拟计算出故障时的过渡电阻和零序电压,得出过渡电阻对应的零序电压大小之间的变化关系,从而确认故障点位置,与实际故障位置相吻合,为接地故障处理方提供数据判别依据。

For the stator ground fault of power plant,a mathematical model is established by MATLAB to simulate the single-phase ground fault of generator.According to the current and voltage waveforms and relevant data of a power plant ground fault,the transition resistance and zero sequence voltage are simulated and calculated,and the change relationship between the zero sequence voltage corresponding to the transition resistance is obtained,so as to confirm the position of the fault point and the actual fault position The results are consistent with each other,which can provide data basis for ground fault treatment.