Temporary power frequency overvoltage mechanism analysis method and system considering new energy switching

The invention discloses a temporary power frequency overvoltage mechanism analysis method and system considering new energy switching. The method comprises the following steps: determining equivalent system parameters of two machines accessed by new energy; analyzing voltage fluctuation characteristics during a control delay period in a power angle swing process, obtaining a Thevenin equivalent circuit seen from a new energy machine end based on the two-machine equivalent system parameters, and analyzing a pooling station voltage value before the new energy is connected to the system; and analyzing the new energy active current, the new energy reactive current, the reactive compensation capacity and the power angle of the sending end unit based on the voltage vector relation of the Thevenin equivalent circuit seen from the new energy machine end. 本发明公开了一种考虑新能源切换的暂时工频过电压机理分析方法及系统。其中，该方法包括：包括：确定新能源接入的两机等值系统参数；分析功角摇摆过程中控制延时期间的电压波动特性，基于所述两机等值系统参数，获得从新能源机端看进去的戴维南等效电路，解析新能源接入系统前的汇集站电压数值；基于所述从新能源机端看进去的戴维南等效电路的各电压向量关