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Microgrids Cluster's Economic Operation Methods Based On Distributed Optimization

Posted on:2018-02-25Degree:MasterType:Thesis
Country:ChinaCandidate:C WangFull Text:PDF
GTID:2322330518455528Subject:Power system and its automation
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With the development of photovoltaic(PV)and wind turbine(WT)generation,it brings a threat to the power system's stable operation.Microgrids cluster(MGC),which is composed by multiple microgrids,provides a favorable environment for the absorption PV and WT.So,it's needed to take optimal operation of microgrids cluster.Accord to the condition of whether connected to the grid,the research of MGC is divided into two case,which are on-grid state and off-grid state.As for the on-grid MGC,it could be more beneficial to share energy in MGC than the independent operation in the environment of discrimination in the feed-in tariff.According to the different roles of the operator in MGC,independent system operator(ISO)mode and roof leased mode are researched,separately.In ISO mode,a pricing model based on supply and demand ratio(SDR)of shared distributed energy is proposed.Considering the factors of economy and comfort,an effective cost model of the users is proposed.Analyzing users' demand response(DR)behavior,the DR model based on non-cooperative game is proposed and a distributed optimization algorithm is designed to solve this model.In roof leased mode,a pricing model based on demand and supply ratio(DSR)of shared distributed energy is proposed.And then,a DR model based on non-cooperative game is proposed with analyzing the DR behavior of users' DR.Finally,a distributed optimization algorithm is also designed to solve the model.The results of case studies show that the distributed optimization operation methods can promote the utility of each part in the on-grid MGC,which can also promote the energy sharing level.And the effectiveness of these methods is verified.As for off-grid MGC,firstly,the basic optimal model of the MGC is formulated.Secondly,the model of each distributed energy resources is introduced and the cost model of battery energy storage system is also built to deal with the real-time optimal dispatching.And then,distributed optimal dispatching method based on alternating direction method of multipliers(ADMM)is proposed.Finally,the method's effectiveness is verified by the case study.
Keywords/Search Tags:microgrids cluster, distributed optimization, internal price, demand response, non-cooperative game, alternating direction method of multipliers
PDF Full Text Request
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