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提出了一种新的、简洁的测定平行双回线的故障距离的计算方法．该方法利用线路单侧的电压、电流测量值， 只需求解一次方程，避免了迭代及解二次方程的伪根问题；仿真计算分析该方法有极高的精确度，算法上没有误差。
A new and concise method for calculating the fault distance of parallel double lines was proposed. The method uses the voltage and current measurement values of one side of the line, and only needs to solve the equation once and avoids the pseudo-root problem of iteratively solving the quadratic equation. The simulation calculation and analysis have extremely high accuracy and no error in the algorithm.