It introduces the function and configuration of the security and stability control system in a region of Hebei southern power grid.The adaptability of its strategy is analyzed.A regional power grid model is built to carry out closed-loop simulation test based on RTplus simulation system.It verifies the control strategy and operation logic stability control system.The test results show that the stability control system can select and cut load accurately under various complex conditions

and it can solve the problem of line overload effectively.It provides some references for the formulation of control strategy and engineering application of relevant stability control system.