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The Air-conditioning Load Participates In The Research On The Photovoltaic Consumption Strategy Of The Distribution Network

Posted on:2021-03-15Degree:MasterType:Thesis
Country:ChinaCandidate:H C FangFull Text:PDF
GTID:2432330647458661Subject:Power system and its automation
Abstract/Summary:PDF Full Text Request
With the increasingly serious global energy and environmental problems,the development of renewable energy and the improvement of the utilization rate of renewable energy have become the focus of national development.In particular,Photovoltaic(PV)has developed rapidly.However,large-scale distributed PV accessing to the grid will bring great pressure to the security of distribution network.In addition,the air-conditioning load is huge,which accounts for a high proportion in the summer peak load of the whole network,the demand response potential of air-conditioning is huge;at the same time,because the building where the air conditioning load is located has the ability of thermal storage,it can store the electric energy in the way of thermal energy.The small-scale control of the air-conditioning load has little impact on the users,and can still meet the users' comfort requirements.Therefore,air-conditioning load can be used as a type of demand response to participate in PV absorption of distribution network.The research work of this thesis is as follows:First of all,based on the mathematical model of constant frequency airconditioning,this thesis proposes the minute level control strategy of constant frequency air-conditioning and the calculation method of air-conditioning load curve and regulation potential considering the operation characteristics of constant frequency air-conditioning and the characteristics of different control modes,and then analyzes the influence of different control parameters on the regulation potential of airconditioning load such as different control time and outdoor temperature.The simulation results show that the proposed control strategy can not only provide demand response service but also meet the user's comfort requirements,and different control parameters have different effects on the air-conditioning load regulation potential.Then,in view of the improvement of PV permeability,it may lead to the surplus problem of PV power,the system architecture of air-conditioning load aggregators participating in the PV absorption of micro-grid is proposed.From the perspective of aggregators,based on the game theory,the decision-making model of load aggregators' bidding and the non-cooperative game model of load aggregators are proposed,aiming at the maximum benefit of load aggregators and then micro-grid operator determines the day-ahead bidding plan.Finally,the feasibility of the proposed model is verified by an example.Finally,aiming at the problem of voltage overlimit caused by PV power reverting to distribution network,a strategy of air conditioning-load participating in auxiliary voltage regulation of distribution network is proposed.Based on Model Predictive Control(MPC),this strategy is a long-scale coordinated control method including realtime control and feedback correction.The goal of this strategy is to minimize the system network loss and the total regulation cost of distribution operators,and maximize the benefits of air-conditioning load aggregators for calculating the active load regulation of each load node's air conditioning load.Finally,the simulation verifies the economy and rationality of the proposed strategy.
Keywords/Search Tags:Air-conditioning load, PV absorption, Non-cooperative game, Voltage regulation, Distribution network
PDF Full Text Request
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