The Optimization Of Economic Operation Of Micro Grid Based On Multi-agent-sysytem

As an efficient way of generating the distributed generators,micro grid is very important for making the best of renewable source,improving energy efficiency and improving the quality of power supply.The studies of operation control of micro grid,energy management,optimizing operation are also the important study of smart grid.The research of optimal operation of micro grid mainly refers the economic optimization,which involves two parts,namely,optimization of micro grid in the electricity market bidding and the inner optimal dispatching of the micro grid.This paper studies the economic optimizing operation of micro grid base on Multi-agent-system from two aspects.The one side is the optimization of bidding in the electricity market for micro grid,and the other side is the optimal dispatching for the distributed generators inner the micro grid.And then proposes an effective optimization strategy to ensure the economic operation of micro-grid.Firstly,for the aspect of optimization of bidding in the electricity market,in view of the fact that China's electricity market is an oligopoly market,the feature of the coexistence of traditional power supply and micro grid in the electricity market,and the characteristics of the low bid capacity,high bid cost and unfavorable market competition of micro grid,which is bad for competing in market,this paper adopts the bi-level bidding strategy base on the Multi-agent-system,in which the micro grid will bid in the form of alliance.In the upper electric power market,the micro grid participates in the electric power market competition with the traditional power supply company to participate in the electric power market competition in the form of alliance.And the improved iterative search method is used to to obtain the bidding game Nash equilibrium point,the Multi-objective planning method is used to revise the result;In the lower market,the non-cooperative game bidding is used to optimize again between the micro grids for the quantity,which is obtained by the alliance of micro grid,the quantitative solution is used to solve the problem,and the final benefit of micro grid obtained from the whole market can be solved.Secondly,for the aspect of optimal dispatch of micro grid,this paper proposes a two-layer macro scheduling model based on MAS,introducing the related control agent,which can reduce the system complexity and improve the expansibility.Finally,the simulations are used to show that the strategies proposed in this paper are effective and reasonable.