考虑动态三相不平衡度的输电线路线损控制方法  

Transmission Line Loss Control Method Considering Dynamic Three-phase Unbalance Degree

作　　者：杨慢慢[1] 刘震宇[1] 赵磊 YANG Manman;LIU Zhenyu;ZHAO Lei(Chengde Power Supply Company of State Grid Jibei Electric Power Company Limited,Chengde 067000,China)

机构地区：[1]国网冀北电力有限公司承德供电公司,河北承德067000

出　　处：《微型电脑应用》2024年第11期174-177,共4页Microcomputer Applications

摘　　要：为了精准计算线路三相不平衡度并降低线路损耗,治理三相电流不平衡度,研究考虑动态三相不平衡度的输电线路线损控制方法。估算输电线路的三相电压不平衡度,并以其为参考计算输电线路三相电流不平衡度,结合等值电阻法与不平衡度因素计算输电线路的线损,当线路损耗过高时,通过在线路中接入基于电压控制的统一潮流控制器,降低输电线路中的电阻功率值与阻抗,实现输电线路线损控制。实验结果证明,该方法可以有效分析三相不平衡负载下输电线路两端电压、电流波形变化,并准确计算输电线路中三相电流不平衡度,且线损率计算结果准确,控制后线损率呈明显下降趋势。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 unbalance degree is studied.The three-phase voltage unbalance degree of the transmission line is estimated,and the three-phase current 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 resistance 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 calculation results of line loss rate are accurate,and the line loss rate shows an obvious downward trend after control.

关 键 词：三相不平衡度 等值电阻法 线损计算 负荷电流 潮流控制器 对称分解法 

分 类 号：TM715[电气工程—电力系统及自动化]