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.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2006年第4期41-44,66,共5页
Proceedings of the CSU-EPSA
关键词
补偿电压
故障分量
电抗器
匝间保护
compensated voltage
fault component
shunt reactor
interturn protection