对华能岳阳电厂引进的发电机无刷励磁系统和ZVA型励磁控制系统的工作原理及应用情况进行了分析，指出设备在运行中存在的问题，并提出改进意见。该无刷励磁系统有较好的运行特性，维护工作量少，能较好地解决发电机转子绕组故障检测和转子参数测量问题；ZVA型励磁控制系统采用双通道三相全控桥式变换器，整流励磁，逆变灭磁，其励磁控制方法对励磁控制设备的设计和制造有参考作用。 The working principle and application of generator brushless excitation system and ZVA excitation control system introduced by Huaneng Yueyang Power Plant are analyzed. The problems existing in the operation of the equipment are pointed out and suggestions for improvement are given. The brushless excitation system has good running characteristics, less maintenance work, can better solve the generator rotor winding fault detection and rotor parameter measurement problems; ZVA-type excitation control system uses dual-channel three-phase full-bridge converter , Rectifier excitation, Inverse demagnetization, the excitation control method of excitation control equipment design and manufacture a reference.