Online decision-making and control of power system stability based on super-real-time simulation

During power grid cascading failure, the operating point changes frequently, resulting in a mismatch or inaccuracy of online pre-decision making emergency control strategy. To solve this problem, an online power system stability decisionmaking and control method based on super-real-time simulation is presented in this paper. A decision-making and control system is developed in which the three main operation modes, offline pre-decision-making, online pre-decision-making, and real-time control, are all coordinated. To verify the method, ADPSS (advanced digital power system simulator) is used to simulate a digital power grid with about 20,000 buses. The closed-loop operation of the digital power grid and the online decisionmaking and control system are implemented. Test results show that when online pre-decision making control strategies are mismatched, aided real-time control works well and can prevent power grid stability loss.