提出了一种基于电流电压补偿原理的支路开断电压快速算法。该算法通过牛顿潮流法计算出故障前网络节点电压，利用已收敛的潮流修正方程式对线路开断参数2阶求导，求出开断电压电流的二阶泰勒级数。基于支路（不包括发电机）退出运行，节点的电流电压满足节点注入功率不变的约束条件，计算出电流电压修正量互为补偿的平均值。利用该平均值作为电压泰勒展开新的修正量，得出线路开断时各节点的电压。该方法的优点是线路开断时不必对系统导纳矩阵因子表进行修正，且只需低阶泰勒展开就可得到精确的节点电压值，同时能够很好地满足计算速度与精度的要求。IEEE标准算例计算结果验证了所提出方法的有效性。

This paper proposes an algorithm of rapidly determining the node voltage based on current and voltage compensation. The pre-contingency voltage is calculated by Newton power flow method, and the derivatives of first 2 orders of current and voltage with respect to branch outage parameters are calculated by using the convergent power flow equation of the base network topology. The values of current and voltage are obtained by using the Taylor series expansion. Lines out of operation(excluding the generator) based on the power injection remain unchanged, the node's current and voltage satisfy the compensation principle, the function of the node voltage with respect to the fault branch parameters is obtained by calculating the average compensation of current and voltage as the voltage Taylor expansion of the correction. The advantage of this method 1ies in the fact that the admittance matrix is not to be re-factorized after one branch is out of operation, and the accurate node voltage can be obtained by using only a low order Taylor expansion, to meet the requirements of calculation speed and accuracy. The feasibility and the efficiency of the proposed method are tested on the standard IEEE system.