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Research On Distributed Economic Dispatch Strategy Of Microgrid Based On Multi-Agent Consistency Algorithm

Posted on:2020-03-14Degree:MasterType:Thesis
Country:ChinaCandidate:L YangFull Text:PDF
GTID:2392330623465327Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
In recent years,problems such as the shortage of energy in the world and the intensification of environmental pollution have become increasingly prominent.Distributed energy has gradually entered people's field of vision and has attracted the attention of scholars.In order to make full use of distributed energy,the number of distributed energy sources in microgrid systems is increasing.Therefore,the economic scheduling problem of each distributed energy source becomes the primary problem of cost saving of microgrid systems.The essence of the economic dispatching problem is to reasonably allocate the active power output of each power generating unit on the basis of satisfying the balance of supply and demand of the microgrid and the constraints of each component,and take the power generation cost as the objective function.For the micro-grid economic dispatch,the centralized optimization method is often used traditionally,but the centralized algorithm has a large amount of computation,heavy communication burden,and weak anti-interference ability,and the distributed algorithm can solve the above problems,based on the multi-agent system.Distributed algorithms,with its flexibility,stability and robustness,support the 'plug and play' function,and have become a research hotspot of scholars all over the world.Based on the distributed algorithm of 'leader',this paper considers both flexible load and network loss,and realizes the economic dispatch of microgrid through improved distributed algorithm with 'leader';considering taking 'leader' The distributed algorithm is easy to cause single point of failure.To solve this problem,this paper proposes a completely distributed algorithm to solve the above problems.On this basis,a limited method is proposed for the problem of slow convergence of existing distributed algorithms.The time-converging distributed algorithm has an important theoretical value and practical engineering significance to improve the convergence speed of the algorithm.The main work of this thesis is:(1)Considering the flexible load access of the microgrid and the network loss of the system,through the improved 'leader' distributed algorithm,the social welfare is the objective function,the economic dispatching problem of the microgrid is realized,and the supply and demand balance and output are satisfied.constraint.(2)Based on the theory of multi-agent consistency,combined with graph theory,this paper proposes a completely distributed algorithm.This algorithm only needs the cost function information of the respective power generation equipment.Through local communication,it cansolve the micro-grid economic dispatch problem and meet the supply and demand.Balance and power generation equipment handle constraints.(3)Aiming at the problem of micro-grid economic dispatching,a completely distributed algorithm with finite time convergence is proposed.This algorithm can make an original converge to the optimal value in a finite time,meet the supply and demand balance and processing constraints,and achieve the minimum power generation cost.
Keywords/Search Tags:micro-grid, economic dispatch, consistency algorithm, finite time convergence, distributed control
PDF Full Text Request
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