摘要
为解决含高渗透率分布式电源DG(distributed generation)的配电环网对故障定位的要求,提出一种改进的故障定位矩阵算法。该算法以网络描述矩阵为基础,并利用馈线终端设备FTU(feeder terminal unit)收集上报的故障电流幅值信息形成改进的故障信息矩阵,通过由网络描述矩阵和故障信息矩阵运算后得到的故障判断矩阵可直接定位故障区域。该算法的优点有:计算量小,运算得出的故障判据简单直观,克服了传统矩阵算法中需根据不同电源假设不同的正方向的不足。对于含多个DG的环网,能在定义一次正方向的前提下准确定位出单一或多重故障,并给出了在故障信息不完备情况下的解决对策。最后通过仿真算例,验证了该算法的有效性。
In order to solve the demand for fault location in ring distribution system with high penetration rate of dis- tributed generations （ DGs ）, an improved matrix algorithm is proposed in this paper. On the basis of the description ma- trix, the magnitude information of fault currents will be collected and sent by the feeder terminal units （ FTU ） in order to form the improved information matrix. The fault sections can be located directly by the judgment matrix, which is obtained by the operation of the description matrix and the information matrix. This algorithm has small calculating quantities and the fault criterion is simple and intuitive. The method avoids the disadvantage that different positive di- rections need to be defined based on different sources in the original matrix algorithm. For ring distribution system with multiple DGs, either single fault or multiple faults can be located rightly on the premise that only one positive direction needs to be defined. The proposed method also solves the fault location issue in the case of incomplete information. A simulation example was analyzed in this paper, which demonstrates the effectiveness of this method.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2014年第12期62-68,共7页
Proceedings of the CSU-EPSA
关键词
环形配电网
故障定位
分布式电源
矩阵算法
多重故障
网络正方向
ring distribution system
fault location
distributed generation （DG）
matrix algorithm
multiple faults
positive direction
