说明：  电力系统在某一运行方式，遭受大干扰后，并联运行的同步发电机间是否能保持同步运行、负荷是否正常运行等问题
(If a power system is subjected to large disturbances in a certain operation mode, whether the synchronous generator in parallel operation can keep synchronous operation and whether the load is running normally or not.)