The safety and stability control system is mainly derived from the stability problem of Panzhihua power grid.The safety and stability control system is briefly introduced as well as the goal of "Transmitting power from Sichuan to East China" and the composition

function and control principle of the system.The stability of Panzhihua power grid is simply described before and after 500 kV Shibanqing substation putting into operation as well as the grid stability at the present time.