Research On Capacity Allocation Of Microgrid Based On Economy And Reliability

In recent year, energy efficiency and environmental protection problem of large power system is increasingly serious by the growing demand for energy, microgrid as a kind of reliable, high quality small distribution grid has been made widely attention. With the deepening of research on microgrid, how to ensure the higher economic efficiency of microgrid system have become the key to implement the microgrid project. At the same time, the characteristics of the volatility and indirect of renewable energy, brings great influence to power quality, safety and reliability of microgrid. This paper will research on optimization running configuration problems of microgrid based economy and reliability.Firstly, this paper introduces the research status quo of microgrid, analyses the characteristics of the microgrid and structure, and expounds the benefits and challenges of microgrid. Also analyzes the operation principle of microgrid through studying the energy management system and the control model of microgrid.Secondly, this paper analyzes the principle and output characteristics of the microsource devices. Set up the wind power, photovoltaic power generation, fuel cell,the mathematical model of micro gas turbine, diesel engine and the battery from the point of view of energy output. At the same time considering the fuel cost, operation maintenance cost and the economic cost of gas pollution reduced fees, etc of micro sources.Then this paper optimized configuration management of microgrid based on economic benefits and environmental pollution. On the one hand, through comparing the cost to consider of the capacity of distributed power supply and storage devices and types.On the other hand, according to the NPV(an economic indicators) to establish a new microgrid economic optimization objective function, it fully considering the initial cost of the units, power generation cost, environmental cost,maintenance cost and the constraint conditions of microgrid operation by the function. And establish an example according to local actual situation, using theimproved adaptive genetic algorithm to optimize the objective function based on Matlab, then put forward economic optimization scheme of microgrid and verified the validity.Finally, simulated renewable energy output by the monte carlo algorithm, get the reliability of the microgrid configuration through the modified genetic algorithm. Put forward an objective function based on reliability and economy comprehensive optimization, and calculated in different weight target. then Through the configuration scheme comparison, this paper the relationship between reliability and reliability and renewable energy. Provide the basis for the application of renewable energy research.