Transmission Line Loss Control Method Considering Dynamic Three-phase Unbalance Degree
In order to accurately calculate the three-phase unbalance degree of transmission lines,reduce line losses and control the three-phase current unbalance degree,a transmission line loss control method considering the dynamic three-phase unbal-ance degree is studied.The three-phase voltage unbalance degree of the transmission line is estimated,and the three-phase cur-rent unbalance degree of the transmission line is calculated by taking it as a reference.The line loss of the transmission line is calculated by combining the equivalent resistance method and the unbalance factor.When the line loss is too high,the resist-ance power value and impedance in the transmission line are reduced by connecting the unified power flow controller based on voltage control in the line,so as to realize the line loss control of the transmission line.The experimental results show that this method can effectively analyze the changes of voltage and current waveforms at both ends of the transmission line under three-phase unbalanced loads,and accurately calculate the three-phase current unbalance degree in the transmission line.The calcula-tion results of line loss rate are accurate,and the line loss rate shows an obvious downward trend after control.
万方数据
维普
