Reliability Margin Analysis of Power System Based on Simulation Approach of EENS Value

As the power grid grows to be of high-voltage,long-distance and high-capacity,requirements for the safety of the grid are increasingly significant,therefore the traditional N-1 criterion reliability calculation can not fully meet the requirements of the reliability evaluation.The Monte Carlo algorithm proposed in the paper is a random probability sampling method used to simulate the system state and to establish the reference state sequence.The method can be used to design a new state for comparison with the reference state.It can fully reflect the system pressure and reliability margin.EENS can serve as a reliability indicator in this paper to analyze the power system reliability.