基于双电压互感器的DPFC线路距离保护新方法Novel Distance Protection Method for DPFC Lines Based on Dual Voltage Transformers
曹建伟,黄志华,张新雨,刘莹,张磊,李斌
摘要(Abstract):
为解决分布式潮流控制器接入输电线路后,单一电压互感器与线路电流互感器构成的保护元件无法兼顾故障方向与区内外故障正确判别的问题,提出分布式潮流控制器接入线路距离保护的新方法。此方法在原有单一电压互感器、单一电流互感器的基础上再增加1个电压互感器构成保护元件,得到母线侧与线路侧两处的电气量,利用母线侧的电压互感器进行故障方向判别,线路侧的电压互感器进行区内外故障识别。PSCAD/EMTDC仿真验证表明,此方法可以正确对故障方向和区内外故障进行判别。
关键词(KeyWords): 分布式潮流控制器;电压互感器;距离保护;方向判别;区内外故障识别
基金项目(Foundation): 国网湖州供电公司多元融合高弹性电网研究与评估支持服务工作项目(SGZJHU00DKWT2000641)
作者(Author): 曹建伟,黄志华,张新雨,刘莹,张磊,李斌
DOI: 10.19635/j.cnki.csu-epsa.001012
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