摘要
目前大型发电厂和变电站 6kV(10kV)系统开始采用中阻接地方式 ,在中阻接地方式下 ,单相接地保护的构成、整定配合原则、零序电流的取得方式等与常规的小电流接地系统有较大区别。文章在分析中阻接地系统的接地故障特点的基础上 ,提出了单相接地保护设计选型时应考虑的一些特殊问题 。
The neutral middle impadance ground mode has started to be used in large power plants and substations 6 kV(10 kV) systems at present. Under the neutral middle impadance ground mode, the composition of the single-phase ground protection, principles for setting match, taking mode for zero sequence current have relatively significant difference from the conventional ground system with the small current. Based on analysis on characters of the ground failure in the neutral middle impadance ground system the paper has put forward some specific issues which must be considered for model selection in design of the single-phase ground protection and some comments on the principles of setting.
出处
《电力建设》
北大核心
2002年第10期35-37,共3页
Electric Power Construction
关键词
中阻接地系统
单相接地保护
整定原则
neutral middle impadance ground system
single-phase ground protection
principles of setting
