东北电力技术2025，Vol.46Issue(7)：49-54,6.
利用非故障相电压判别不对称故障方向的方法
Method for Discriminating Asymmetric Fault Direction Using Non-Fault Phase Voltage
杜兆强 1赵志宏 1伍叶凯 1聂娟红 1黄继伟1
作者信息
- 1. 北京四方继保自动化股份有限公司,北京 100085
- 折叠
摘要
Abstract
With the rapid promotion of new energy,flexible DC transmission and other technologies,the proportion of power electro-nic equipment in the power grid is gradually increasing.The rapid adjustment performance of AC current amplitude and phase angle brings varying degrees of impact to the directional components of traditional line protection.It proposes a line protection device as a di-rectional component for distance protection of high-voltage lines.The fault direction is correctly identified by using the method of non-fault phase voltage to judge the asymmetric fault direction.The simulation test is carried out according to the actual system on site.Compared with the original negative sequence direction identification method,this method is more effective.The fault direction can be correctly identified in the case of weak feedback characteristics on the new energy side,which verifies the effectiveness of the method.关键词
新型电力系统/非故障相电压/距离保护/负序方向/不对称故障Key words
new power system/non-fault phase voltage/distance protection/negative sequence direction/asymmetric fault分类
信息技术与安全科学引用本文复制引用
杜兆强,赵志宏,伍叶凯,聂娟红,黄继伟..利用非故障相电压判别不对称故障方向的方法[J].东北电力技术,2025,46(7):49-54,6.
