Research On Optimal Scheduling Of Wind Storage Fire Combined System Based On Chance Constrained Programming

Wind energy has good social and economic benefits and sustainable development significance.However,due to the uncertainty of wind speed,the intermittent and random fluctuations of output are more prominent,which leads to serious wind abandonment and greatly reduces wind power consumption.In view of the above problems,it is of great significance to adopt a reasonable way to stabilize the wind power output,reduce the amount of abandoned air,and achieve maximum consumption of renewable energy.Therefore,this paper studies the optimal scheduling of pumped storage units for wind farms.The main contents are as follows:First of all,Aiming at the uncertain factors in the optimal scheduling,The wind power prediction model is established by using the power-wind speed approximate piecewise function,and the prediction model of user load is established.which lays a theoretical foundation for the follow-up work.Secondly,a new coordinated operation mode of wind-storage unit is proposed.Combined with this method,and with the maximum economic benefit of wind-storage unit,the economic optimization scheduling model of wind-storage unit based on chance constrained programming is established.At the same time,the model is solved by the combination of stochastic simulation technology and improved particle swarm optimization.Then,this paper simulates the scheduling model and verifies that the pumped-storage unit can achieve good peak-shaving effect,smooth wind power output,and increase the proportion of wind farm power generation in power grid-connected power.The impact of small wind turbine output power volatility on the grid.Finally,based on the above,this paper constructs an optimal scheduling model for wind storage fire combined system with the minimum cost of wind fired combined system.By comparing the cost of the wind storage fire combined system with different values of confidence level,it is verified that the wind storage fire combined system scheduling model established in this paper not only reduces the output of the thermal power unit,but also reduces the output of the wind-storage combined system.The overall investment costof the system,and the grid-connected power of the thermal power unit is smoother and more stable.