风电场联络线非全相运行时的恢复电压研究  

Research on the Recovery Voltage of Wind Farm Tie Line during Open-Phase Operation

作　　者：王月林[1] 李凤婷[1] 辛超山[2] 

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,新疆乌鲁木齐830047 [2]国网新疆电力公司经济技术研究院,新疆乌鲁木齐830047

出　　处：《中国电力》2016年第8期93-98,共6页Electric Power

基　　金：国家自然科学基金资助项目(51267019;51467019)~~

摘　　要：针对线路单相接地保护动作后非全相运行的情况,分析了故障相恢复电压特性及其影响因素,在此基础上研究了风电与常规能源的阻抗特性。在PSCAD中构建了线路非全相运行时的故障相恢复电压模型,仿真研究了故障性质、风机类型、注入容量、线路布置方式和电压等级对恢复电压的影响。研究结果表明,风电与常规能源不同,在风电联络线非全相运行时,风电场正、负序阻抗远大于零序阻抗,引起健全相电流增大,导致电感耦合电压比常规能源大。研究结果可为风电场联络线自适应分相重合闸配置提供理论依据,进一步提高重合成功率。In view of the open-phase running case after single-phase grounding protection action, the voltage characteristics of the fault phase and its influence factors are analyzed. Besides, the impedance characteristics of wind power and conventional energy are studied. The recovery voltage model of fault phase is developed in PSCAD. And the effects of fault properties, wind turbine types, wind power output, tie line an＇angement modes as well as voltage levels are simulated and studied. The research results show that the wind farm, quite different from conventional energy, has a positive and negative sequence impedance much higher than the zero sequence impedance when tie line open-phase runs, which results in the increase of sound phase current, and consequently leads to the inductive coupling voltage much higher than that of the conventional energy. The research results can provide a theoretical basis for the adaptive sequential reclosing of wind farm tie line and improve the success rate of reclosing.

关 键 词：风电场联络线 非全相运行 电容耦合 电感耦合 恢复电压 

分 类 号：TM614[电气工程—电力系统及自动化]