基于μPMU和二分搜索法的辐射状配电网电压暂降源定位  

Location of voltage sag source in radial distribution network based onμPMU and binary search method

作　　者：马莉[1] 娄景辉 董鹏远 陈应雨 李宇 MA Li;LOU Jinghui;DONG Pengyuan;CHEN Yingyu;LI Yu(School of Electrical and Control Engineering,Xi′an University of Science and Technology,Xi′an 710699,China)

机构地区：[1]西安科技大学电气与控制工程学院,陕西西安710699

出　　处：《电力工程技术》2023年第5期177-184,共8页Electric Power Engineering Technology

基　　金：陕西省自然科学基础研究计划资助项目(2023-JC-YB-308)

摘　　要：快速准确地定位电压暂降源,对提高供电可靠性和明确供需双方责任具有重要意义。文中提出一种基于微型同步相量测量装置(micro-phasor measurement unit,μPMU)和二分搜索法的辐射状配电网电压暂降源精确定位方法,首先利用装设μPMU的分层电路求解暂降源电流,在各分层电路分别假设暂降源电流注入各母线节点,进而计算末端母线虚拟电压变化量,并与实测的末端母线电压变化量求误差,根据误差大小确定暂降源邻近母线。然后在暂降源邻近母线相邻区段的中点设置虚拟母线,利用二分搜索法快速缩小定位区间,实现暂降源的精确定位。最后在MATLAB中利用IEEE 33节点模型对文中方法进行验证,结果表明该方法对辐射状配电网中不同位置、不同类型的电压暂降源定位精度高,且具有一定的抗干扰能力。Locating the voltage sag source quickly and accurately is of great significance to improve the reliability of power supply and clarify the responsibility of both supply and demand.In this paper,a precise location method of voltage sag source in radial distribution network is proposed based on micro-synchronous phasor measurement unit(μPMU)and binary search method.Firstly,the sag source current is calculated by the layered circuit equipped withμPMU.In each layered circuit,it is assumed that the sag source current is injected into each bus node.The virtual voltage variation at the terminal bus is calculated,and the error is obtained by comparing it with the measured voltage variation at the terminal bus.According to the size of the error,the sag source adjacent bus is determined.Secondly,the virtual bus is set at the midpoint of the adjacent section of the sag source adjacent bus.The binary search method is used to quickly narrow the locating interval and achieve precise locating of the sag source.Finally,the IEEE 33-node model is used to verify the proposed method in MATLAB.The results show that the proposed method has good locating accuracy for different positions or different types of voltage sag sources in radial distribution networks.The proposed method has certain anti-interference ability.

关 键 词：辐射状配电网 电压暂降源 精确定位 微型同步相量测量装置(μPMU) 暂降源邻近母线 二分搜索法 

分 类 号：TM711[电气工程—电力系统及自动化]