基于零序幅值比较的电抗器匝间保护  

Investigation of Shunt Reactor Interturn Protection Based on Zero Sequence Magnitude Comparison

作　　者：陈卫[1] 陈德树[1] 尹项根[1] 张哲[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074

出　　处：《电力系统及其自动化学报》2006年第4期41-44,66,共5页Proceedings of the CSU-EPSA

摘　　要：针对高压电抗器小匝数匝间保护目前存在的问题,提出了一种新的基于零序补偿电压幅值比较原理的电抗器匝间保护方案。即根据零序网络中零序电压在系统零序阻抗和电抗器零序阻抗上的分布情况,通过直接比较电抗器首端零序电压与补偿到电抗器末端中性点的零序补偿电压的幅值大小,来判别电抗器匝间故障。动模实验表明,该方案原理简单直观,灵敏度高,受系统运行方式变化的影响较小。A novel shunt reactor interturn protection scheme is proposed based on zero-sequence compensated voltage magnitude comparison. According to zero sequence voltage distribution from system zero sequence impedance to shunt reactor zero sequence in zero sequence circuit, the zero sequence voltage at the terminal of shunt reactor and the zero sequence compensating voltage at neutral are compared in the scheme. The experimental result obtained from power system simulation lab demonstrates that the proposed scheme has high sensitivity and is unaffected by system operation.

关 键 词：补偿电压 故障分量 电抗器 匝间保护 

分 类 号：TM772[电气工程—电力系统及自动化]