【摘要】 基于电路理论和发电机的短路过渡过程理论,利用节点阻抗阵推导出电力系统短路时任意时刻短路电流的实用计算机算法。该计算机算法大大减轻了传统运算曲线算法的工作量,且具有较高的准确度,能够自动完成系统短路电流任意时刻衰减周期分量的求解,并通过实例验证了算法的正确性。更多还原

【Abstract】 The traditional curve-based method for variant symmetrical AC component of short-circuit current of power system is still commonly used, which takes much labor with lower accurate results. According to relative theories about electric circuit and synchronous generators’ post-fault transient, a practical computerized method making use of node impedance matrix is proposed to calculate the instantaneous currents of a faulty power system. Compared with the traditional curve-based method, this method can calculate the currents with high accuracy and littleuser effort. Itcan automatically calculate the periodic componentsofvarying shortcircuit currentsateach time point, and it is verified by examples.更多还原