The time harmonic voltage and current wave propagation along a transmission line can readily be transferred from frequency domain voltage and current phasor distribution along the line.

由传输线上电压及电流沿线分布之频域相量，可转换为传输线上各频率成份弦波电压及电流沿线之时域传播。

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Secondly, two classical models of distributed parameter DLSP: power frequency model and time-domain model. Based on these two models dynamic phasor model has been deduced.

其次，本文分析了同杆双回线分布参数的两种经典模型：工频量模型和时域模型，并在此基础上推导了时变动态相量模型。

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