Design Of Island Micro-grid Simuiation System Based On Multi-Agent And Research Of Energy Management Control Strategy

With the expansion of the large scale distribution network, the disadvantages of the traditional large power system gradually emerge, and it becomes more and more difficult to adapt to the high security and reliability of electricity demand which rises as the improvement of people’s living standard. In such a background, the micro-grid system arises at the historic moment, the micro-grid system can be used as a power grid load, or can enter the islanded mode with the disconnection of large power grid. The application of micro-grid improves the operation efficiency of power grid and brings to life for the innovation of the traditional power grid.This paper, on the basis of full Investigation research status and development trend of the micro-grid, studies the multi-agent islanded micro-grid system architecture and function based on the contract net protocol, introduces the key technologies of this system, including the structural characteristics of multi-agent systems, the contract net protocol under the FIPA specification and the theory of token mechanism. This paper designs and realizes an islanded micro-grid system based on multi-agent, which is realized by C++language. This system uses CentOS operating system as simulation platform, the calling between classes and multi-threading technology realize the communication and collaboration between Agents. This system also can get the dynamic balance in different times and environment, and can make the micro-grid work in the state of maximal benefit integrally. It’s convenient to add an agent local control module to the original system by using C++class, which improves the openness and flexibility of the system. Then, study the micro-grid energy management strategy, analyzes and compares three common micro-grid energy management strategies of micro-grid system under different energy management goals in parallel mode and island mode, focus on the research of Island micro-grid multi objective optimization algorithm based on multi-agent and analyze the feasibility of the use of genetic algorithms in multi-objective optimization of micro-grid. In the future, will further enrich and perfect the function of islanded micro-grid system based on multi-agent. Improve PV and wind power to make it close to the real power function; Add power construction costs, use life and other constraints, improve efficiency function; Increase the load type, improve system availability etc.