同步发电机新型叠加强励励磁回路二极管故障和电容并联作用分析  

Analysis of the Strong Excitation Circuit Diode Breakdown of the New Superposition Strong Excitation System for the Synchronous Generator and the Function of Shunt Capacitance

作　　者：王利来[1] 刘念[1] 潘荣超[1] 黄大可[2] 李建[1] 李顺[1] 

机构地区：[1]四川大学电气信息学院,成都610065 [2]中国长江电力股份有限公司葛洲坝电厂,湖北宜昌443002

出　　处：《电测与仪表》2014年第17期112-116,共5页Electrical Measurement & Instrumentation

摘　　要：针对同步发电机新型叠加强励励磁系统的可行性,重点研究了新型叠加强励叠加回路的二极管故障以及并联电容对波形的影响。Matlab仿真结果表明,二极管故障对励磁系统会造成很大影响,尤其是主回路并联二极管出现短路故障时,强励叠加将导致失败,必须给予重视。同时,经过整流后的电流在并联一个电容进行处理时,并不能对转子电流波形产生平波作用,因此在工程上不需要这种平波方式。In order to study the feasibility of the new superposition strong excitation system for the synchronous genera-tor,this paper focused on the diode breakdown of the new superposition strong excitation circuit,and the effects of shunt capacitance on the waveform. The Matlab simulation results showed that diode breakdown would have great effects on the excitation system,and especially when short-circuit faults occurred on the main circuit parallel diode, superposition strong excitation would result in failure,so it should be paid special attention to. And the rectified cur-rent flowing of rotor through a shunt capacitor could not produce any smoothing waveform. so this smoothing waveform method is not used in engineering.

关 键 词：同步发电机 叠加强励 自并励系统 二极管故障 并联电容 

分 类 号：TM93[电气工程—电力电子与电力传动]