【摘要】 在不修改故障前原网节点阻抗参数矩阵的条件下,研究了电力系统故障分析中横向故障和纵向故障端口开路电压的计算方法。根据横向故障端口开路电压的物理意义和叠加原理,在已知电力系统内各发电机电势幅值和相位角或已知各发电机电势幅值相等、相位角相同的条件下,推导出计算横向故障端口开路电压的方法。根据纵向故障端口开路电压的物理意义、网络等值方法和叠加原理,在已知电力系统内各发电机电势幅值和相位角或已知各发电机电势幅值和断相支路两侧等效电源相位差的条件下,推导出计算纵向故障端口开路电压的方法。文中的计算方法可满足各种情况下电力系统故障分析计算的需要。更多还原

【Abstract】 Without modifying the nodal impedance matrixes of original networks, the method to calculate voltage across faulted open port in power system fault analysis is discussed. Based on the physical meaning of voltage across faulted open port, network equivalent method and the superposition theorem, under the condition that potential values and phase angles of generators have been given or their values are the same, the voltage values across faulted open port in short circuit analysis are obtained. Or given the potential values and phase angles of generators, or the potential values of these generators and the phase angle difference across faulted line, the voltage values are also achieved. The proposed methods can meet the needs of power system analysis under different conditions.更多还原