同塔双回输电线路电流不平衡机理分析  

Analysis on Current Unbalance Mechanism of Double-circuit Transmission Lines on the Same Tower

作　　者：唐明[1] 张纯[1] 丁理杰[1] 张华[1] 李旻[2] 滕予非[1] 

机构地区：[1]国网四川省电力公司电力科学研究院,四川成都610072 [2]国网四川省电力公司电力调度控制中心,四川成都610041

出　　处：《四川电力技术》2015年第5期29-32,80,共5页Sichuan Electric Power Technology

摘　　要：针对日益增多的同塔双回输电线路在不换位条件下出现的电流不平衡问题进行了机理研究和建模仿真。给出了同塔双回输电线路各导体之间的电感矩阵,列出了各相导体之间的电磁方程,并采用MATLAB数值计算方法对该电磁方程进行求解。采用PSCAD/EMTDC对同塔双回输电线进行仿真建模,仿真结果与理论计算均表明,逆序排列能够有效降低线路参数的不平衡度。Unbalanced phase current appears in double- circuit transmission lines on the same tower without transposition,so mechanism research and modeling simulation are carried out to study this phenomenon. Inductor model of each conductor is established to obtain the inductance matrix of the electromagnetic equation. Numerical calculation by MATLAB is done to solve the electromagnetic equation and PSCAD model of double- circuit transmission lines on the same tower is established for simulation. Simulation result and theoretical calculation show that the inverse arrangement of transmission lines can obviously decrease the unbalance degree.

关 键 词：同塔双回 电感矩阵 逆序排列 PSCAD 

分 类 号：TM713[电气工程—电力系统及自动化]