摘要
提出一种利用同步电压相量进行输电网络故障定位的新方法。该方法首先运用对称分量法和线性叠加原理建立故障后的附加正序网络并且定义了故障点的匹配指标,进而基于该指标运用遍历搜索方法寻找故障点位置。该算法仅利用电压相量进行计算,因而能避免因电流互感器饱和导致的误差影响,且仅需少量的同步相量测量单元配置。基于PSCAD的仿真实验表明该方法能够有效地定位任意电网结构的短路故障,并且不受故障类型、过渡电阻等因素的影响。
A novel fault locating method for transmission network using synchronized voltage phasor is presented. Based on symmetrical component method and linear superposition principle, the additional positive sequence network after fault is established and the matching index on fault point is defined. Then the fault can be located by traversing searching method with this index. Because only synchronized voltage phasor is used, the fault locating accuracy of this method is not affected by saturation of current transformer, and only sparse PMUs （phasor measurements unit） are needed. Simulations carried out with PSCAD have shown that the proposed technique can locate short-fault point on any type of transmission network accurately and adaptively, with no influence from factors such as fault resistance, fault type and so on.
出处
《电力系统自动化》
EI
CSCD
北大核心
2009年第11期33-37,共5页
Automation of Electric Power Systems
基金
国家重点基础研究发展计划(973计划)资助项目(2004CB217902)
国家自然科学基金资助项目(50507018,50677062,50595414,60421002)
“十一五”国家科技支撑计划重大项目(2006BAA02A01)
教育部科学技术研究重大项目(305008)
新世纪优秀人才(NCET-07-0745)支持计划
浙江省自然科学基金资助项目(R107062)~~
关键词
故障定位
同步电压相量
附加正序网络
对称分量法
fault locating
synchronized voltage phasor
additional positive sequence network
symmetrical component method
