抑制小水电机组自励磁的非常规措施研究  

Unconventional strategies to suppress small hydroelectric generator self-excitation

作　　者：丁理杰[1] 李旻[1] 张华[1] 王彪[1] 

机构地区：[1]四川电力科学研究院,成都610054

出　　处：《华东电力》2013年第3期661-664,共4页East China Electric Power

摘　　要：基于自励磁发生的本质及其发展过程,提出了避免出现过高工频电压的长线路差动保护单侧延时跳闸以及调整主变分接头降高压侧运行电压的非常规措施。以藏区某220 kV联网工程为实例,应用该措施有效消除了藏区小机组的严重自励磁危害,并且验证了本方法不会对电网运行带来明显负面影响。Based on the mechanism and physical process of generator self-excitation, unconventional strategies such as one side time delay of differential protection on long transmission line and transformer tap adjustment are proposed. Taking a 220kV interconnection project for example, the risk of generator self-excitation can be eliminated by such strategies, and no obvious side effect will be brought in.

关 键 词：自励磁 保护单侧延时 分接头调整 

分 类 号：TM71[电气工程—电力系统及自动化]