大型凸极同步发电机单相接地的研究

Analysis of Large Salient Pole Synchronous Generator during Single Phase to Ground Fault

先用集中参数模型对凸极同步发电机单相接地进行解析计算，并与仿真结果相比较．两者计算的波形和数值均十分吻合．然后用分布参数模型进行单相接地的仿真，并与前述计算结果相比较．两者具有类似的规律和一定的联系．

A concentric parameter model was used for the analysis and calculation of synchronous generator during single phase to ground fault.The result of analytic calculation is very close to the result of digital simulation.A distributed parameter model was also applied to the study of simulation,and the result of simulation was compared with the former.Both calculated results have a determined relationship and a similar rule.The model parameter of a 550 MW salient pole generator in the Er Tan Power Station was used for the example.The result of calculation can be used as a reference for the generator neutral protection of the Three Gorges Project.