Researches And Applications In The Economic Operation Of Micro-grid Based On Membrane Computing

When the micro-grid compared with the traditional power grid, it has multiple distributed powers that can increase the performance of the grid to deal with an accident. Further more, micro-grid has flexible operation mode. It can not only provide electricity for a small amount of users directly when being independent from power grid, but also be incorporated into power grid to serve the common user together. And it can also be used as a standby for power grid which called "plug and play". And the research for the economic operation of micro-grid is of great significance. Because it can reduce the cost of power generation and improve the efficiency of micro-grid by reasonable allocation the generation of distributed powers. Membrane computing (P system) is a distributed parallel computing model (membrane systems) which out of the collaboration of the complex cells, such as:cell structure and function of the life, biological tissues, organs and so on. At present, many approximation optimization algorithms which use the membrane computing are put forward by many scholars to solve the problems in practical application. The researches which about the optimization control strategy of the economy operation of micro-grid are done in this paper, the main work is as follows:(1) Study deeply on the development and research status of the micro-grid technology home and abroad, summarize the key technology in the study of micro-grid, include: modeling and simulation of the micro-grid system, the operation control and energy management, environmental and economical evaluation, the research and application of optimization algorithm of economic operation of micro-grid, etc.(2) Study of the current economic operation strategy and existing problems of micro grid.(3) Research on the characteristics of the distributed generation units and set up the mathematical model of distributed power supply, such as:wind turbine, photovoltaic, fuel cells, micro gas turbine and so on.(4) Establish the optimization model of economic operation of micro-grid by considering comprehensively the generation costs, such as:power generation, anti-pollution, operation maintenance, reliability, etc. And the comprehensive cost of the objective function of economic operation of micro-grid is proposed in this paper by considering the two aspects of economy and environmental protection in the operation mode of interconnection and island from the power grid.(5) Quantum particle swarm optimization algorithm which based on P system is proposed in this paper. P system and particle swarm algorithm are combined in the algorithm which applied to the study of the economic operation of micro-grid. And the convergence speed and accuracy are improved. The results in the simulation experiments show that the algorithm has the advantages of high precision and fast convergence speed.(6) The modeling of micro-grid system is made by using Matlab software in this paper. And the quantum particle swarm optimization algorithm which based on P system is embedded into the entire simulation experiments of the economic operation of micro-grid combined with the real example to realize the optimization of the distributed generations, include:WT, PV, FC, MGT and Battery. Moreover, the simulation experiments are carried out in the operation mode of interconnection and island from power grid both in static and dynamic scheduling in order to verify the effectiveness and correctness of the algorithm.