The Research On Wind Power Accommodation Of Power System Considering Wake Effect

Due to the uncertainty of wind power generation,when the wind power capacity is greater than a certain proportion of the total load of the system,the impact of wind power grid-connected on the power system must be considered.The uncertainty of wind power has limited the development of wind power to a certain extent,and the actual wind farm has wake effect,which will also affect the wind power penetration limit.Therefore,this paper is devoted to establishing a model for the capacity of the wind power access receiving power grid,and improving the wind power penetration limit under the premise of ensuring the safe and stable operation of the system.This paper first summarizes the mathematical model of stochastic optimal power flow and its solution method,and introduces the concept of wind power penetration limit.Based on the traditional wind farm output model,this paper introduces the Latin hypercube sampling method,carries out the relevant wind speed simulation,and establishes the wake effect model,thus constructing the wind farm output model considering the wake effect,which lays a foundation for the stochastic optimal power flow model.Then,based on the above output model,a stochastic optimal power flow model considering the wake effect is proposed.The model aims at the maximum capacity of wind power,and satisfies the constraints of the system flow balance equation,the node voltage amplitude,the line active power flow,the rotating reserve capacity,the reactive power output and the climbing capacity of the conventional unit,etc.,considering the constraints with random variables,the opportunity constraint programming theory is used to deal with the inequality constraints.The dynamic penalty factor is introduced,and the opportunity constraint is added to the objective function.The particle swarm optimization algorithm is used to solve the stochastic optimal power flow model.Finally,the simulation verification is carried out by MATLAB using IEEE 30 and IEEE 118 node systems.The simulation results show that the stochastic optimal power flow model considering the wake effect can effectively improve the wind power penetration limit and ensure that the system can receive wind power to a greater extent.