大中型火电机组励磁系统主备励无冲击切换研究──超前补偿法及其应用  

RESEARCH ON ON-LINE-SWITCHING BETWEEN AVR AND RESERVE EXCITATION WITHOUT PERCUSSION IN EXCITATION SYSTEM OF LARGE-MEDIUM-SCALE FOSSIL FUEL GENERATOR UNIT-Advance-Retrieval Method and Its Application

作　　者：吴龙[1] 刘为群[1] 李国辉 杨一文 雷秀生 

机构地区：[1]国家电力公司电力自动化研究院,南京210003 [2]广州珠江发电厂,广州511458

出　　处：《电力系统自动化》1999年第24期23-27,共5页Automation of Electric Power Systems

摘　　要：大中型火力发电机组励磁系统运行时，如果进行励磁调节器（AVR）与备用励磁切换操作，发电机组瞬间会出现很大的无功冲击。为了实现发电机组主备励之间无扰动切换，在建立新的数学模型的基础上，提出了超前补偿法。经过珠江发电厂1号和3号机组的实际应用，证明了超前补偿法有效地解决了机组的无功冲击。There exists momentary reactive power percussion when on-line-switching is completed between AVR and reserve excitation in excitation system' of large-medium-scale fossil fuel generator unit. In order to realize on-line-switching without any reactive power percussion between AVR and reserve excitation, this paper establishes a new mathematical model of excitation system and provides advance-retrieval method. The practical application of the method to No 1 and No 3 unit of Zhujiang Power Plant in China indicates that the advance-retrieval method solves reactive power percussion of generator units successfully.

关 键 词：励磁调节器 励磁系统 超前补偿 火力发电机组 

分 类 号：TM310.3[电气工程—电机]