Research On Economic Operation Optimization Method Of Power Grid Considering Grid-connected Wind Power Based On Demand Response

Large-scale development of clean energy such as wind power has become an important method to solve energy shortages and environmental problems,but its output has the characteristics of intermittent,random,peak-reversal,etc.In order to prevent the impact of wind power grid connection on the safe and stable operation of the system,more rotating spare capacity is often required to deal with it,thereby increasing the operating cost of the system.As a demand-side management resource,demand response has the advantages of fast response speed,high flexibility,and better economy than adding new units.Therefore,in-depth study of demand response is an effective method to solve the shortage of power supply,reduce the peak operating pressure of the system,reduce the impact of wind power grid connection on the system,increase the system's wind power consumption,and reduce the system's rotating reserve capacity.This paper studies the demand response and the operating mechanism and operating cost of the power generation side,and on this basis,analyzes the system's rotating reserve capacity,establishes and performs an objective function,and the optimization specifically includes the following aspects:First,this article describes the demand response and the operating characteristics of wind power and thermal power units,analyzes the user's participation process and response mechanism in demand response measures,and the operating characteristics of wind power units and thermal power units,and establishes demand response and power generation operating cost model.Secondly,this article expounds the concept and classification of the system's rotating reserve capacity,analyzes the characteristics of the system's rotating reserve capacity and models its operating cost,and establishes an objective function of the system's operating cost considering the generation cost,demand response cost and rotating spare capacity operating costs.Then,the output characteristics of wind turbines are studied in depth,and the impact of different proportions of wind power on the system's rotating reserve capacity is analyzed.Then,based on the uncertainty of wind power output,its predicted output and output error models are constructed.According to the characteristics of demand response,the feasibility of equivalent replacement of part of the system's rotating reserve capacity is analyzed,and the operation cost model of the rotation reserve capacity after the demand response replaces a part of the system's rotation reserve capacity is established.The objective function of the total operating cost of the system is optimized,and the constraints considering various factors are given.Finally,the function principle and optimization characteristics of PSO and CPSO are explained.Taking the demand response scheduling problem of 19 users as an example,PSO and CPSO are used to solve and analyze the objective function.The results of the calculation examples show that the research content of this paper has a certain role in reducing the operating cost of the system,reducing the operating pressure of the power grid during the peak period of power consumption,and increasing the capacity of the wind power consumption of the system.Explained the effectiveness of the study of this paper on the economic operation of the system.