发电机励磁误强励原因探讨

Discussion on the causes of the faulty forced excitation of the generator

结合新安江水力发电厂采用的SAVR2000、HWLT型微机励磁系统探讨引起误强励的原因,并提出电流突变量闭锁双PT断线、电子磁盘多重化等方法避免误强励,通过合理设计发电机励磁回路、正确选用调节电阻、利用励磁变过流等方法有效消除误强励的危害,保证发电机安全可靠运行。

Exemplified by SAVR-2000 and the HWLT microcomputer-controlled excitation systerm adopted by Xin＇anjiang Hydroelectric Power Plant, this paper concerns the cause of the faulty forced excitation and proposes several ways to avoid faulty forced excitation including the confinement of the sudden variable of electric current to double PT broken line, electronic disk multiplication and so on and so forth. Designing the excitation circuit of the generator reasonably, selecting the adjusting resistance correctly and employing the high electricity of the excitation transformer are effective ways to eliminate the harm caused by faulty forced excitation as well as to ensure the sound operation of the generator.