摘要
针对电网事故或切换负荷后变电站的变压器中性点运行方式改变可能对接地距离保护和零序电流保护动作产生影响,通过变压器中性点不同运行方式下的相关线路保护定值整定计算和故障模拟,证明了变压器中性点运行方式的变化不会影响线路接地距离和零序电流保护可靠配合,可充分保障线路安全供电,同时说明了两种保护相互配合方案的实用性。
The change of neutral point operation mode of transformer in substation has possibly impact on the action of grounding distance protection and zero sequence current protection when the power grid accident or switching load ap- pears. By calculating the relevant line protection setting and simulating fault under different operation mode of transformer neutral point, this paper proves that the transformer neutral point operation mode does not influence the reliable coordina- tion of line grounding distance protection and zero sequence current protection, which can fully guarantee the safety lines of power supply. It also explains the practicability of two protection coordination schemes.
出处
《水电能源科学》
北大核心
2012年第12期167-169,151,共4页
Water Resources and Power
关键词
中性点运行方式
接地距离保护
零序电流保护
配合方案
neutral point operation mode
grounding distance protection
zero sequence current protection
coordination scheme
