External network equivalence method of large-scale interconnected power network containing large-scale new energy

The invention discloses an external network equivalence method of a large-scale interconnected power network containing large-scale new energy. The method comprises the steps of 1, dividing networks and forming an equivalence network; 2, determining requirement parameters of the equivalence network; 3, calculating injection current sources; 4, calculating admittance matrix parameters; 5, carrying out Norton Thevenin conversion; and 6, correcting potentials of voltage sources. According to the method, the demands of the power networks of new energy access regions for the voltage support capability are taken into consideration, the problem that the large-scale interconnected power network is high in information quantity is solved, and the method has the advantage of simple calculation and fast calculation speed. 本发明公开了种含大规模新能源的大型互联电网的外网等值方法，包括步骤：1)网络划分及等值网的形成；2)等值网络需求参数的确定；3)注入电流源计算；4)导纳矩阵参数计算；5)诺顿戴维南转换；6)电压源电势修正。本发明方法考虑了新能源接入地区电网对电压支撑能力的要求，克服了大型互联电网信息量大的问题，具有计算简单且计算速度快的优点。