含分布式电源配电网故障定位改进矩阵算法  

Fault Location of Distribution Networks with DGs Based on an Improved Matrix Algorithm

作　　者：王一非 贾燕冰[1] WANG Yi - fei;JIA Yan- bing(Shanxi Key Lab of Power System Operation and Control, Taiyuan University of Technology, Taiyuan Shanxi 030024, Chin)

机构地区：[1]太原理工大学电力系统运行与控制山西省重点实验室,山西太原030024

出　　处：《计算机仿真》2018年第4期58-64,共7页Computer Simulation

摘　　要：分布式电源接入配电网使传统配电网故障定位方法的准确性和适应性降低。针对传统矩阵算法需要不同电源假定不同的正方向进行多次故障定位、故障判定规格化处理计算量大、T节点区域故障定位准确率低等问题,提出一种改进矩阵算法。根据配电网各运行方式下正常潮流流向定义开关正方向,自动修正网络描述矩阵;只根据FTU上传的n×1阶故障信息矩阵快速获得n×1阶故障判断矩阵;根据电网结构特点和基尔霍夫定律,改进T节点区域故障判据;同时针对FTU上传信息不完备或畸变等情况,提出了相应的故障定位方法,提高了馈线各区域内的单重故障和多重故障的定位准确度。最后通过算例仿真,验证了改进矩阵算法的准确性和容错性。The accuracy and adaptability of the traditional fault location methods have been reduced with DGs ac- cess to distribution network. Aiming at the disadvantages that different positive directions need to be defined based on different sources, fault diagnosis requires a large amount of standardized processing, and the accuracy of T node fault area location is low in the original matrix algorithm, we put forwarded an improved matrix algorithm in the paper. Ac- cording to the normal power flow direction of the distribution network, the direction of the switch was defined, and the network description matrix was automatically corrected. The n × 1 fault judgment matrix based on FTU obtained the n × 1 fault information matrix. According to the structural characteristics of the power network and Kirchhoffs law, the T node fault criterion was improved, meanwhile, the fault location method was proposed in the case of incomplete in- formation and fault information distortion, which improves the location accuracy of single fault and multiple faults in each region. Finally, an example was given to verify the accuracy and fault tolerance of the improved matrix algo- rithm.

关 键 词：分布式电源 配电网 矩阵算法 故障定位 容错性 

分 类 号：TM743[电气工程—电力系统及自动化]