西南交通大学 电气工程学院,四川 成都 611756
张海强(1994 —),男,江西南昌人,硕士研究生,研究方向为HVDC换流站保护与故障定位(E-mail:zhq.swjtu@foxmail.com);
林 圣(1983 —),男,湖南宁乡人,副教授,博士研究生导师,博士,通信作者,研究方向为供电系统保护与故障定位、故障预测与管理、地铁杂散电流分析与抑制等(E-mail:slin@swjtu.edu.cn);
何正友(1970 —),男,四川自贡人,教授,博士研究生导师,博士,研究方向为输(配)电网故障诊断与保护、轨道交通电气化与自动化关键技术等。
收稿:2019-04-09,
修回:2019-08-02,
纸质出版:2019-09-10
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张海强,戴文睿,牟大林等.直流输电系统换流站保护适应性分析及优化方案研究[J].电力自动化设备,2019,39(09):102-108.
ZHANG Haiqiang,DAI Wenrui,MOU Dalin,et al.Adaptability analysis and optimization scheme for HVDC converter station protection[J].Electric Power Automation Equipment,2019,39(09):102-108.
张海强,戴文睿,牟大林等.直流输电系统换流站保护适应性分析及优化方案研究[J].电力自动化设备,2019,39(09):102-108. DOI: 10.16081/j.epae.201909022.
ZHANG Haiqiang,DAI Wenrui,MOU Dalin,et al.Adaptability analysis and optimization scheme for HVDC converter station protection[J].Electric Power Automation Equipment,2019,39(09):102-108. DOI: 10.16081/j.epae.201909022.
为防止直流输电系统换流站保护在区外故障下误动作,分析换流站保护的适应性,并提出不影响保护速动性与灵敏性的逆变站保护优化方案。利用最小电压前行波与电压反行波幅值积分比值构造逆变站区内外故障的识别判据,进而考虑逆变站保护与区外交流系统保护在时间上的协调配合,设计逆变站保护在区外故障下的防误动策略。基于PSCAD/EMTDC的仿真结果表明,所提保护优化方案不受故障位置、故障类型、故障初始角、过渡电阻以及噪声干扰的影响。
In order to prevent malfunction of HVDC converter station protection under out-zone faults,the adaptability of converter station protection is analyzed,and an optimization scheme of protection without affecting its speed and sensitivity is proposed. The minimum amplitude integration ratio of voltage forward and backward traveling wave is used to construct the identification criterion of in- and out-zone faults of inverter station,and an anti-malfunction strategy of inverter station protection under out-zone faults is designed considering the temporal coordination of inverter station protection and out-zone AC system protection. The simulative results based on PSCAD/EMTDC show that the proposed scheme is not affected by fault location,fault type,initial fault angle,transition resistance and noise.
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