Research On The Economy Dispatch And Optimal Allocation Of A Virtual Power Plant

With the development of social economy and technology,energy and environmental problems are increasingly severe.And the renewable energy power generation system has been widely concerned.Although the distributed generation improves the economics and environmental effect of electric,the fluctuation and randomness of its output make the fluctuation of power grid operation is greater,the real-time power balance is difficult to control,and the economic benefit of distributed generation is low.As a new technology of controlling and managing energy,the virtual power plant plays an important role in promoting the consumption of renewable energy and ensuring the safe operation of power grid.In this context,this paper studies the economy of virtual power plant from three aspects of market bidding,economic scheduling and optimal configuration,and develops a distributed power cluster equivalent platform.Firstly,based on the analysis of foreign power market trading mechanism,this paper puts forward the business model of the virtual power plant participating in market trading,constructs the bidding model of virtual power plant based on demand response,and analyzes the impact of bidding strategy on the economy of virtual power plant from the perspective of market trading.Secondly,aiming at the problem of the optimal allocation of virtual power plant,a random optimal allocation method of the energy storage system in virtual power plant is proposed to improve the operation benefit of the virtual power plant.From the two levels of construction and operation,the access location,capacity and battery type of the energy storage system in virtual power plant are optimized.The simulation results show that the model is practical and effective.Aiming at the economic dispatch problem of a virtual power plant,the risk cost of the virtual power plant transaction is modeled under the typical power market environment.The objective function is established to maximize the profit of the virtual power plant and minimize the cost of purchasing electricity by users.And a Stackelberg game model between the virtual power plant and a flexible load is established.The influence of operation mode,load type,load rate and bidding mode on the economy of the virtual power plant is analyzed through the simulation of examples.Finally,based on the Visual Studio software,this paper develops a visual cluster equivalent platform of the distributed power generation in the virtual power plant.The platform can support the steady,dynamic and electromagnetic transient equivalent calculation of large-scale and multi type distributed power.It can effectively improve the calculation efficiency and provide basic services for large-scale distributed power grid connection simulation analysis.