【摘要】 针对时域仿真法和暂态能量函数法,求临界切除时间都有其优点和局限性的特点,运用非线性动力学系统理论,把经大扰动后的非线性电力系统经过一次线性变换和一次非线性变换(正则变换),将原始电力系统变换到线性系统,再根据线性系统的稳定子空间来确定原始系统的稳定流形,从而求得稳定边界,进而计算出临界切除时间,算例验证了该方法的有效性,该方法为基于稳定流形变换法。更多还原

【Abstract】 Aimed at their merits and limitation of the step by step time -domain method (SBS) and transient energy function method (TEF) which are used in calculating the critical clearance time in electric power system, In general ,it is put forward that nonlinear power system is transformed into a linear system (normal forms of vector field) by linear transformation and nonlinear transformation based on nonlinear dynamic system theory. According to stable subspace of the linear system we can get the stable manifold of the nonlinear power system, so we would seek the stable boundary to calculate the critical clearance time. The stimulated result proved this method to be valid. The method is called power system stability calculation based on manifold transformation.更多还原