电力系统保护与控制2024，Vol.52Issue(12)：58-68,11.DOI:10.19783/j.cnki.pspc.231189
基于混合量测状态估计的配电网故障定位方法
A fault location method based on hybrid measurement state estimation for a distribution network
摘要
Abstract
The micro-phasor measurement unit(μPMU)provides a measurement basis for distribution automation upgrade,but the present stage of the number of μPMU cannot really meet the needs of fault location in a traditional distribution network.To address this,this paper proposes a fault location method based on hybrid measurement state estimation by integrating the μPMU and a smart meter(SM)and considering a multiple state estimation method of virtual buses.First,the measurement data from the μPMU and smart meter are input into the state estimator by equivalent transformation.Then,the positions of the μPMU are exploited to divide the network into different zones.It calculates fault current by estimated results to restrict the fault searching zone and to reduce computational complexity.To locate the fault within the identified zone,additional virtual buses are placed to form a multiple specific fault topology and execute fault state estimation respectively.This calculates the weighted measurement residual index to identify the fault location.Finally,through real-time digital simulation system(RTDS)tests,the results verify that the method can precisely ascertain the fault locations in various fault scenarios and has good robustness to measurement noise.关键词
配电网/故障定位/状态估计/微型相量测量单元/智能电表/混合量测Key words
distribution network/fault location/state estimation/micro-phasor measurement unit(μPMU)/smart meter/hybrid measurements引用本文复制引用
季亮,殷佳明,姜恩宇,洪启腾,李博通,李振坤..基于混合量测状态估计的配电网故障定位方法[J].电力系统保护与控制,2024,52(12):58-68,11.基金项目
This work is supported by the General Program of National Natural Science Foundation of China(No.52177098). 国家自然科学基金面上项目资助(52177098) （No.52177098）
国网河南省电力公司科技项目资助(5217H0220001) （5217H0220001）
