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提出了基于分布参数模型与粒子群优化(PSO)算法的超高压同塔双回双极直流输电线路工频参数测量方法.给出了求解超高压同塔双回双极直流线路工频参数的数学模型,详细介绍了利用PSO算法对超高压直流输电线路工频参数进行测量的方法和步骤.基于PSCAD软件,利用该方法对不同长度的同塔双回双极直流输电线路进行了仿真测试.仿真结果表明,该方法的测量精度可以满足超高压同塔双回双极直流输电线路工频参数的工程测量要求.“,”Based on distributed parameter model and particle swarm optimization (PSO) algorithm,a new measurement and identification method of power frequency parameters of double-circuit double-pole extra high voltage (EHV) DC lines on the same tower is proposed.The model of solving the power-frequency parameters of double-circuit EHV DC lines on the same tower is given;the measurement and identification method and procedures for the parameters of EHV transmission lines using the PSO algorithm are introduced in detail.Simulations are carried out for double-circuit EHV DC lines on the same tower with different lengths.The PSCAD simulation results show that the measurement accuracy of the proposed method can meet the requirements of measuring the power frequency parameters of double-circuit EHV DC transmission lines on the same tower.