随着电子技术的发展 ,特别是大功率半导体硅整流元件和可控硅的开发 ,使同步发电机的励磁方式得到了较大的改进。目前 ,大部分小型水轮发电机均采用可控硅励磁系统 ,但往往因为励磁故障使发电机不能发电。特别是在汛期 ,有水不能发电 ,给电站造成一定的经济损失。为此 ,我将平 With the development of electronic technology, especially the development of high-power semiconductor silicon rectifier and thyristor, the excitation of synchronous generator has been greatly improved. At present, most small hydroelectric generators adopt SCR excitation system, but often the generator can not generate electricity because of excitation fault. Especially in the flood season, water can not generate electricity, causing some economic losses to the power station. To this end, I will be flat