Simulation Evaluation Method of Power Grid Operation Considering High Proportion New Energy Grid Connection

After high proportion new energy is connected to the power grid, due to its large randomness, fluctuation and uncertainty of its output, higher requirements are put forward for the safe and stable operation of the power grid. In this paper, the stochastic output characteristics of two high-proportion new energy sources - wind power and photovoltaic - are analyzed, a time series model of new energy output reconstruction is constructed based on the theory of stochastic differential equation, and the operation simulation model of each link of power system operation, the stochastic operation simulation model of new energy sources and the mathematical model of various conventional unit operation modes are established. According to the power planning scheme, under the given power grid planning scheme, the whole year operation simulation of the power system is realized, and the cost, energy consumption, emission, utilization efficiency and other indexes of the system are counted to reasonably evaluate the rationality and economy of the power grid planning scheme.