Abstract：Due to the asymmetrical self-impedance of the multi-circuit lines, it becomes much more difficult to decouple the network equation and brings new challenges for fault analysis with four-parallel lines on the same tower. According to the studies of existing phase-mode transformation and the characteristics of the four-parallel-line phase-mode transformation, two new decoupling methods are proposed to decouple the asymmetrical impedance matrix. One is to decouple the matrix with the original decouple steps, while the other uses the contrary order. The physical meanings of the two phase-mode transformations are discussed according to the characteristics of the transformation matrix, and their mathematical calculation is deduced to explore the sequentiality and the reversibility of the decouple steps. Applicability of the phase-mode transformations is explained according to their physical meanings and mathematical equations, and the phase-mode transformation form is also generalized. The simulation results indicate that the new method is suitable for the fault analysis involved in four-parallel lines with asymmetrical self-impedance.
刘琦, 邰能灵, 范春菊, 于仲安, 尚瑨. 同塔四回不对称参数线路的相模变换[J]. 电工技术学报, 2015, 30(18): 171-180.
Liu Qi, Tai Nengling, Fan Chunju, Yu Zhongan, Shang Jin. Phase-Mode Transformation of Asymmetry-Parameter Four-Parallel Lines on the Same Tower. Transactions of China Electrotechnical Society, 2015, 30(18): 171-180.
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2015, Vol. 30 
