摘要
现有输电线路故障测距方法在实际应用中的测距结果与实际情况相比,相对误差和绝对误差均较大,为此,本文设计了一种面向光伏电网的输电线路故障自动测距方法。首先利用对称分量法确定光伏电网输电线路故障分量正序网络;其次将输电线路故障分量正序网络的节点虚拟故障电流方程作为依据,构建输电线路故障区域定位判定条件;最后基于稀疏电压幅值完成故障自动测距。经实例分析得出,新的测距方法在实际应用中的测距结果与实际情况更加接近,测距精度显著提升。
The existing transmission line fault ranging method in the practical application of ranging results compared with the actual situation the relative error and absolute error are large,therefore,this paper designs an automatic fault ranging method for photovoltaic grid is carried out.Firstly,using symmetric component method to determine the positive component network of photovoltaic transmission lines.Secondly,the virtual fault current equation of transmission line fault component positive sequence network is used as the basis for constructing the judgment conditions of the transmission line fault area localization.Finally,based on the sparse voltage amplitude,completes the automatic fault ranging.Through example analysis,the ranging results of the new ranging method in practice are closer to the actual situation,and the ranging accuracy is significantly improved.
作者
李金文
LI Jinwen(Hubei Electric Power Survey and Design Institute Co.,Ltd.,Wuhan,Hubei 430040,China)
出处
《自动化应用》
2023年第20期151-153,共3页
Automation Application
关键词
光伏
线路
自动测距
故障
输电
电网
photovoltaic
line
automatic ranging
fault
transmission
power grid
