中文摘要：

分析了未换位高压输电线路的序参数特性,得出了未换位的双回或4回线参数矩阵中,每回线的正序、负序、零序电抗之间不仅存在耦合,而且与其它各回线之间也存在耦合等结论,并用EMTP和MALAB证明其正确性。从一些假设条件出发,分析了高压输电线路的简化序参数的应用情况。

英文摘要：

The order parameter characteristics of the untransposed high-voltage transmission lines were analyzed.It was concluded that the couplings not only exist between the positive,negative and zero sequence reactance of each circuit,but also exist between the other circuits in the untransposed double-circuit or four-circuit line parameter ma-trix.The correctness of the conclusions was proved with MATLAB and EMTP.The application of the simplified order parameters of the high-voltage transmission lines was analyzed from some assumed conditions.