文档介绍：
特高压长距离输电线路引起发电机过电压
其抑制措施的研究#
薛士敏*
5
(天津大学电气与自动化工程学院
天津
300072)
摘要:针对 1000kV 特高压长距离输电线路上自励磁过电压和操作过电压,在论述和分析国
内外相关研究成果的基础上,提出了该问题的研究要点。主要包括:需要精确自励磁过电压
产生条件;提出特高压长线路甩负荷引起的发电机自励磁过电压和操作过电压可能同时发
10
15
20
25
30
生,互相叠加,产生巨大的危险过电压峰值,这将使线路、输变电设备和大机组绝缘严重损
坏;指出研究避雷器灵活整定和控制投入技术具有很好的前景,对避雷器抑制过电压效果进
行仿真,验证了其有效性。本文所提出的研究要点对保证未来特高压电网和大机组安全运行
有重要理论和经济效益。
关键词:特高压输电系统;自励磁过电压;操作过电压;避雷器
中图分类号:TM77
Study of Over-voltage and Their Suppression Measure in
Ultra-high Long Distance Transmission Lines
XUE Shimin
(Electrical Engeneering and Automatic School,TIANJIN University, TIANJIN 300072)
Abstract: Based on the discuss and the analyse of the domestic and international study of self
excitation over voltage and switching over voltage in 1000kV ultra high voltage long distance
transmission line, the main point of the study of these problems is proposed . The point is the
precise production condition of the self excitation over voltage. Besides, the possibility of
simultaneity and superposition of the self excitation over voltage aroused by the load rejection in
the ultra high voltage long distance transmission line is first proposed in this paper and will result
a serious over voltage which will damage the transmission lines transmission equipments and
large units. This paper has also indicated that the flexible setting and control technology of the
arrestor have a v