采用传输矩阵方法的多回超／特高压交流输电线路的电气不平衡度计算

超／特高压输电线路不换位会导致电气参数不对称，进而使得线路电压、电流不平衡。线路不平衡度必须控制在一定范围内，准确预测输电线路电气不平衡度对输电线路设计、运行尤为重要。从多导体传输线模型出发，提出一种简单且解析的传输矩阵方法，并使用其他数值计算软件验证了该方法的正确性。进而将该方法应用于输电线路电气不平衡度计算，有效提...

Calculation on Electrical Unbalance of Multi-circuit EHV/UHV Transmission Lines by Transmission Matrix

Unsymmetric electric paramters of non-transposed EHV/UHV transmission lines lead to unbalance of voltage and current and it affects normal operation of loads located at the end of tranmsission lines,thus the degree of line unbanlance have to be restricted within a certain range,and it is especially important for the design and operation of transmisssion line to accurately calculate the unbalance.Based on multi-conductor transmission line(MTL) model a simple and analytic method to calcualte the degree of transmission line unbalance by transmission matrix is proposed and the correctness of the proposed method is verified by calculation results with phase-mode method and Π model.Calculation errors of the proposed method,phase-mode method and Π model method under different line lengths are analyzed.Applying the proposed method to the calculation of electrical unbalance in transmission lines the accuracy of unbalance calculation can be effectively imporved.Finally,the electrical unbalance of double-circuit transmission line is calculated by the proposed method.