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为研究多回输电线路同时存在非全线平行架设、平行架设段回路数不同、导线型号不同、分裂数不同、塔型不同、线路长度不同等复杂结构的输电线路不平衡度计算方法,根据平行架设线路间的距离,将需要考虑回路间电磁耦合的平行架设段均以多导体传输线模型表示,再根据线路的实际连接方式,以Simulink为仿真平台,建立仿真模型,计算线路的不平衡度,计算方法同时考虑了线路的静电不平衡度和电磁不平衡度的综合影响,计算精度高.通过广东木棉变电站16回220 kV线路不平衡度的计算,得出了该站16回出线的最优相序布置方案,该方案使木棉站16回220 kV出线的最大不平衡度降低至1.54％,满足了相关标准的限值要求.“,”In order to calculate the unbalance factor of multi-circuit transmission lines with complex arrangement,which including partially paralleled sections,different line type,different towers and sub-conductors,a method based on the Matlab Simulink tools is presented.The simulation calculation model is built,which considered the influences of above factors.The transmission lines parallelly erected in one common corridor were equivalent to multi conductor transmission line model because of the electromagnetic coupling.In this method,both electrostatic unbalance factor and electromagnetic unbalance factor are considered.As an example,the unbalance factor in 16-circuit 220 kV overhead transmission lines,which come from the Mumian substations,is studied.Unbalance factor of various phasing arrangements are compared and the optimal phase arrangement are presented,which can reduce the maximal value of unbalance factor less than 1.54％.