计及电网负荷的发电机自励磁动态过程及相关问题  

Dynamic Process for Generator Self-excitation Considering the Load of Power Grid and Its Related Issues

作　　者：滕予非[1] 丁理杰[1] 张华[1] 汤凡[1] 魏巍[1] 

机构地区：[1]四川电力科学研究院,四川成都610072

出　　处：《四川电力技术》2013年第2期87-91,共5页Sichuan Electric Power Technology

摘　　要：对考虑负荷情况下发电机自励磁动态过程进行了分析。分析结果表明,当发电机带长线路的孤网内存在负荷时,由于负荷对发电机转速升高有限制作用,系统过电压不会上升到饱和点,从而对系统中的设备起到了很好地保护作用。同时发现,孤网系统内的最小负荷对自励磁抑制措施也会产生相应的影响。建议在制定相关措施时,需根据本地最小负荷进行校验。The dynamic process of generator self - excitation is analyzed considering the effect of active load in the system. The analysis results show that, when there is the active load in the isolated grid which contains the generator and the unload long transmission lines, the overvoltage of the system caused by self - excitation can be limited obviously, because the rotating speed of the generator can be limited by the load. Therefore, the equipment in the system can be protected. Meanwhile, the minimum load in isolated grid has the effect on the restraining measures of the self - excitation too. It is suggested that the lo- cal minimum load should be considered when drawing up the measures.

关 键 词：自励磁 有功负荷 抑制措施 

分 类 号：TM713[电气工程—电力系统及自动化]