发电机励磁功率单元的换相过电压保护及仿真

摘要

On account of the commutation over-voltage problem for power unit of generator excited system, a DC-blocking protection circuit was presented and the corresponding mathematical model was established, and then the parameters of the model was optimized by genetic algorithm. Moreover, Matlab Simulink toolbox was used to simulate the optimization parameters. Finally, the accuracy of optimization parameters was verified by analyzing the simulation waveform. Comparison of the simulation waveforms of pre- and after-optimization verifies the correctness and feasibility of the optimization method.%针对发电机励磁功率单元的换相过电压问题,提出了直流阻断式过电压保护电路,建立了该保护电路的数学模型,并且利用目前在工程优化领域经常用到的遗传算法对该数学模型的参数进行了优化.然后利用Matlab软件的Simulink工具箱对得到的优化参数进行模拟仿真.通过与参数优化前的仿真波形进行对比,验证了该优化方法的正确性和可行性.