超高压电缆-架空线混合线路故障测寻方法  

New Method of Fault Detection and Location for EHV Cables with Transmission Lines

作　　者：吴承恩[1] 邰能灵[1] 郁惟镛[1] 范春菊[1] 滕乐天[2] 周韫杰 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市200240 [2]上海市电力公司,上海市200002 [3]上海市电缆公司,上海市200070

出　　处：《电力系统自动化》2005年第10期26-29,59,共5页Automation of Electric Power Systems

基　　金：许继电力科技基金资助项目上海高校优秀青年教师后备人选科技基金资助项目

摘　　要：提出一种超高压电缆架空线混合线路故障测寻的新方法。首先利用有效的判据确定故障发生在电缆侧或架空线侧,然后利用故障区域首末端电压、电流突变量值递推算出故障点。经过简单的改进,该方法同样适用于更复杂的超高压架空线电缆架空线混合线路。新方法不要求双端数据同步,不受线路两端系统阻抗和过渡电阻的影响,不存在伪根判别问题,易于实现。仿真结果显示这种算法具有较高的测距精度和实用价值。A new method of accurate fault location for EHV cable with transmission line is presented. Based on the proposed criterion, the method can discriminate the fault happened in EHV cables from transmission lines, then the fault location can be determined by using the variation of voltage and current obtained from both ends of the connecting lines. The method is also suitable for more complex system such as EHV transmission line-cable-transmission line with only a little changes in the criterion. Simulation results show that the proposed new method does not depend on the data synchronization at both ends of the line and can provide accurate result even if the source impedances and fault resistance are different. The proposed method is easy to implement without false-root identification.

关 键 词：超高压 电缆—架空线混合线路 故障测距 

分 类 号：TM755[电气工程—电力系统及自动化]