220kV主变开关断口闪络保护设计探讨  

The design and discussion of 220 kV transformer breaker flashover protection

作　　者：汤勇 常胜[2] 赵志华 贺春 

机构地区：[1]广东珠海发电厂,广东珠海519050 [2]广东省电力设计研究院,广东广州510600 [3]许继日立电气公司,河南许昌461000

出　　处：《继电器》2003年第9期74-77,共4页Relay

摘　　要：介绍了大型发电机变压器组装设开关断口闪络保护的必要性,并通过对珠海发电厂220kV主变开关断口闪络保护的分析,阐述了断口闪络与三相不一致两种故障现象的异同点及开关断口闪络保护原理、动作逻辑的完善。This paper describes the necessity of providing breaker flashover protection for a largescale generatortransformer set.Based on analyzing the breaker flashover protection for main transformer installed at Zhuhai power plant,the phenomena of threephase imbalance and breaker flashover are illustrated.The principle of breaker flashover protection is given and the improvement of operational logic is proposed.

关 键 词：大型发电机 电力变压器 开关 断口闪络保护 设计 

分 类 号：TM77[电气工程—电力系统及自动化]