泵站励磁装置故障分析与改造  

Fault Analysis and Improvement of Excitation Device in Pumping Stations

作　　者：张宇[1] 李扬[1] 王华良 汤炜[3] ZHANG Yu;LI Yang;WANG Hua-liang;TANG Wei(Jiangdu Water Management Division of Jiangsu Province,Yangzhou 225200,Jiangsu Province,China;Beijing Qianfeng Technology Co,.Ltd,Beijing 101400,China;Yangzhou Jiangdu District Water Bureau,Yangzhou 225200,Jiangsu Province,China)

机构地区：[1]江苏省江都水利工程管理处,江苏扬州225200 [2]北京前锋科技有限公司,北京101400 [3]江苏省扬州市江都区水务局,江苏扬州225200

出　　处：《中国农村水利水电》2021年第7期161-165,171,共6页China Rural Water and Hydropower

摘　　要：江都第四抽水站原励磁装置在使用10年后因设备老化等原因导致投励失败、电机失步等故障多发。针对以上问题,选用WKLF-102型励磁装置并进行针对性技术改进。新励磁系统采用三相桥式全控整流技术,分析了励磁变压器和整流可控硅运行不良的原因,解决了励磁灭磁电阻和励磁变得过热以及可控硅受损的问题;通过分析同步电机异步起动转子感应电流和同步电机投励磁势矢量最佳时刻,采取顺极性准确角投励方式,优化励磁投励电路,实现励磁精准投励;优化电机失步再整步和双闭环控制的控制逻辑,解决了电机失步和调节缓慢的问题。并通过现场试验数据验证了更新改造的有效性。The original excitation device of Jiangdu No.4 pumping station has been used for 10 years,which leads to many failures such as excitation failure and motor out of step due to equipment aging and other reasons.In view of the above problems,WKLF-102 excitation device is selected and relevant technical improvement is carried out.The new excitation system adopts three-phase control full bridge rectifier technology,analyses the excitation transformer,solves the problems of excitation excitation resistance and excitation transformer overheating and thyristors were bad.Through an analysis of synchronous motor asynchronous starting rotor induction current and synchronous motor excitation potential vector optimal moment,polarity accurate angle excitation mode is put forward and optimized.It also optimizes the control logic of motor out of step and double closed-loop control to solve the problems of motor out of step and slow regulation.The effectiveness of the renovation is verified by field test data.

关 键 词：同步电机 励磁装置改造 电机失步 双闭环控制 

分 类 号：TV675[水利工程—水利水电工程]