Research On Energy Scheduling Optimization Of Micro-grid Under The Independent Operation Mode

In recent years, the distributed generation has been developed rapidly and mature.The micro-grid belongs to the distributed generation which is also on the better way.It gets more and more attention for it is an efficient technology that most use of renewable energy power generation. The diversity and instability of renewable energy power generation unit needs a new and reliable energy management system, to compass the project’s reliability and economic. The optimization of energy management of micro-grid has been an important research. To resolve the instability,economic, and harmony of the micro-grid system, the thesis mainly discusses the micro-grid optimization design and the energy management strategy.First, introduce the development status and determine the research target, also the significance and background of the thesis. Detail analysis about classification, mission and control mode of micro-grid energy management. Then classify the micro-grid energy management based on different operating conditions and control manners.Second, establish mathematical model and analysis power generation characteristics of micro power. For photovoltaic cells, wind power generation unit,microturbines, fuel cells, diesel generators, energy storage device output power to establish specific mathematic model. And photovoltaic, wind power, energy storage and load cell to establish steady state model to analyze the simulation operating characteristics. So that we can choose the right strategy MPPT for wind power and photovoltaic cells, and decide real-time charging and discharging for the battery.Last, optimize the strategy of micro-grid energy. According to its operation characteristics of wind power, photovoltaic, battery and its cost, we propose a strategy based on natural selection optimization algorithm to be good for operating cost,maintenance cost and other economic reasons. Simulation analysis demonstrates that natural selection algorithm can resolve the problems of energy scheduling. Through analysis of the structure of micro-grid, we design micro-grid monitoring center based on LabVIEW, and construct a man-machine interface. So that we can enable communication between the host computer and the design the database, further complete the data collection and monitoring systems.