基于电容电压的并补输电线路自适应三相重合闸策略  

Adaptive three-phase auto-reclosing strategy based on capacitor voltage for power transmission lines with shunt reactors

作　　者：黄飞 李凤婷 解超 王婷 马宏涛 白海滨 HUANG Fei;LI Fengting;XIE Chao;WANG Ting;MA Hongtao;BAI Haibin(Engineering Research Center for Renewable Energy Power Generation and Grid Technology,Ministry of Education,Xinjiang University,Urumqi 830047,China;Changji Power Supply Company of State Grid Xinjiang Electric Power Co.,Ltd.,Changji 831100,China)

机构地区：[1]新疆大学可再生能源发电与并网技术教育部工程研究中心,新疆维吾尔自治区乌鲁木齐830047 [2]国网新疆电力有限公司昌吉供电公司,新疆维吾尔自治区昌吉831100

出　　处：《电力自动化设备》2020年第6期170-176,197,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51877185)。

摘　　要：并补的储能特性会增大三相跳闸后二次电弧持续时间的不确定性,尤其对于高阻故障而言,线路残余电气量衰减速度过快,将严重影响已有故障性质判据的可靠性,甚至导致线路重合失败。针对上述问题,摒弃以往以线路残余电气量为依据的思路,利用预充电电容对线路放电,根据电容放电电压变化特性判定线路故障类型。基于PSCAD/EMTDC平台的仿真结果表明,在不同故障类型、故障位置、过渡电阻下,所提自适应三相重合闸策略均能保证其判定准确性。Energy storage feature of shunt reactors can increase the uncertainty of secondary arc duration after three-phase tripping,especially for the faults with high transition resistance,the residual electrical quantities usually damp too rapidly to ensure reliability of the existing fault characteristic criteria,and even result in a reclosing failure.In view of the above problems,the pre-charged capacitors are used to dis⁃charge to the power transmission lines instead of the idea based on the residual electrical quantities of the line,the type of line fault is judged by the varying characteristics of capacitor discharging voltage.Simula⁃tions based on PSCAD/EMTDC verify that the proposed adaptive three-phase auto-reclosing strategy can guarantee its accuracy under various working conditions with different fault types,fault locations and transition resistances.

关 键 词：并补 分布电容 高阻故障 预充电电容 三相重合闸策略 

分 类 号：TM73[电气工程—电力系统及自动化]