Research On The Economic Operation Of Microgrid Considering Demand Response

This article puts forward the method of taking in to account the impact of demand response resources on the optimal operation of microgrid can realize the multi-level utilization of energy in microgrid,meanwhile,improving the reliability of power supply in microgrid system,increasing the accommodation rate of renewable energy in microgrid system,smoothing the load curve and reducing the pollution gas emissions,and so on.In this paper,based on the optimal operation of microgrid system,the role of the electricity price-based demand response resource and the incentive-based demand response resource in promoting the economic operation of microgrid is studied respectively.The main research work is as follows:Firstly,this paper analyzes the research background and significance of the demand side response and the microgrid optimization operation,then summarizes the current research status.Secondly,the structure model and operating status of the mainly micro power supply in the microgrid system are comprehensively summarized.Taking a typical combine heat and power microgrid with photovoltaic,wind power turbine,micro gas turbine,fuel cell,waste heat boiler,thermal storage device and power storage device as an example,the structure model and operation characteristics of each micro-source are analyzed in detail,which provides the theoretical basis for the research on the optimal operation of micro-grid in the following chapters.Thirdly,a green economic model of combine heat and power microgrid with the incentive demand response resources is established,where the uncertain output of wind and photovoltaic and load forecast are considered.This paper added the interruptible load into microgrid in isolated mode as a virtual generation resource to peak-shaving.At the same time,considering economy and environment and heating earnings,fuzzy chance constrained programming,converted to clear equivalence class,was adopted to solve the uncertainty of prediction.Then,the multi-objective particle swarm optimization algorithm,based on chaotic search,was adopted to solve the model.The optimal economic and environmental dispatch strategy and the Pareto front of multi-objective optimization solutions were given.Finally,this paper focuses on the price-based demand response on the dispatch and operation of microgrid.Based on the price-based demand response model,the scenario generation method is adopted to depict the randomness and uncertainty of wind and photovoltaic output in microgrid,then a two-stage stochastic optimization model for microgrid is established.The scheduling of price-based demand response resource is optimized in the first stage to accommodate wind and photovoltaic output.In the second stage,the reserve resources of the dispatchable distributed generations are adjusted to correct the imbalance between power supply and load demand in the real-time opera-tion scenario,which can meet the needs of different output scenarios.The results indicate that the proposed two stage price-based de-mand response stochastic scheduling method has the merit in coping with the uncertainty of wind and photovoltaic output,which can improve the overall economy of microgrid effectively.