The vector fitting method is used to model the frequency-varying DC line and the influencing factors of the modeling are analyzed. Through the impedance frequency characteristic measurement of the line, the vector fitting method is used to approximate the measured discrete points with rational function, then obtain a mathematical analysis model that considers frequency-varying parameters, and establish its equivalent circuit model on this basis The established equivalent circuit model and the circuit model are compared and analyzed under PSCAD software, and the results verify the effectiveness of the method.
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韩昆仑,杨东睿,代宇. 基于矢量拟合的直流输电线路建模[J]. 科学技术与工程, 2021, 21(24): 10304-10309. Han Kunlun, Yang Dongrui, Dai Yu. DC transmission lines modeling based on vector fitting[J]. Science Technology and Engineering,2021,21(24):10304-10309.