基于负序电流实部的电压暂降源定位方法研究  

Research on Voltage Sag Source Positioning Method Based on Negative Sequence Current Real Part

作　　者：何觅 代剑波 郭成 蒋羽鹏 杨发宇 HE Mi;DAI Jianbo;GUO Cheng;JIANG Yupeng;YANG Fayu(Kunming Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Kunming Yunnan 650000,China;School of Electric Power Engineering,Kunming University of Science and Technology,Kunming Yunnan 650500,China)

机构地区：[1]云南电网有限责任公司昆明供电局,云南昆明650000 [2]昆明理工大学电力工程学院,云南昆明650500

出　　处：《湖北电力》2023年第1期32-39,共8页Hubei Electric Power

基　　金：云南电网公司科技项目(项目编号:YNKJXM20220091)。

摘　　要：电压暂降源定位是电压暂降治理的基础以及划分供用电双方责任的重要依据,通过开展基于负序电流实部的电压暂降源定位方法研究。首先,从电网故障分析入手,基于线性电路叠加原理,分析扰动源作用下负序电流实部变化规律;然后,根据等效替代原则,将对称故障构造为非对称故障,使得非对称故障定位方法能够运用到对称故障定位中;最后,根据负序电流实部的正负来确定电压暂降扰动源的相对位置,仿真结果验证了该方法的准确性与有效性。Voltage sag source positioning is the base of voltage sag treatment and the important basis for dividing the responsibilities of both power supply and consumption.This paper studies the voltage sag source positioning method based on the negative sequence current real part.Firstly,starting from the fault analysis of the power grid,and based on the superposition principle of linear circuits,the real change law of negative sequence current under the action of disturbance source is analyzed.Then,according to the principle of equivalent substitution,the symmetric fault is constructed as an asymmetric fault,so that the asymmetric fault location method can be applied to the symmetric fault location.Finally,the relative position of the voltage sag disturbance source is determined according to the positive and negative of the negative sequence current real part.Simulation results verify the accuracy and effectiveness of the proposed method.

关 键 词：电能质量 负序电流实部 电压暂降 源定位 等效替代 

分 类 号：TM714[电气工程—电力系统及自动化]