Research On The Photoyoltaic Generation System Based On Micro Grid Operation

In the21st century, cause of the consumption of oil, coal and other non-renewableenergy exhausted, human beings enter a critical period of large-scale exploitation andutilization of new energy sources. Renewable energy generation become an importantway for new energy utilization, however, as more and more distributed generationconnect to distribution network, the traditional distribution network structure willchange. A large number of distributed generation application of modern powerelectronic technology, has also produced a lot of harmonics to redact power quality, itwill threaten the safe operation of the distribution network, caused by obstacles to theutilization of new energy. Micro-grid launch a new way of thinking for the utilization ofnew energy. Micro-grid can sufficient exert the characteristics of the new energy, it isthe key of the future of human resources and environment, we can predicted that,micro-grid construction will rapidly develop in21st century, based on the utilization ofnew energy. This paper study the photovoltaic power generation, micro-grid operation,control technology and photovoltaic technology based on core of Micro-gridtechnology.In this paper, the micro-grid system controlling and operation, photovoltaic powergeneration requirements and controlling have been detailed studied. Detailed introducedcontrol idea of micro-grid running and photovoltaic power inverter control strategy. Inthis paper, the described control strategy simulation set up an experimental prototype.Main content of the paper are follows:(1)The paper described the development process of the micro-grid, the necessityand feasibility of the micro-grid establishment, PV maximum power point trackingalgorithm to control the maximum power output of photovoltaic cells.(2)Designed a non-reversed current micro-grid system, Including Micro GridController, load controller and PV inverter controller, this micro-grid system is mainlybased on the photovoltaic. Micro-grid control strategy play a major role in controllinggrid connected operation and isolated operation, and control photovoltaic maximumpower output and the specified power output. The main purpose of the specified poweroutput is to stop photovoltaic electric power to the grid output, avoid a threat to the normal operation of large power grids.(3)Analysis of three-phase inverter circuit topology, and improve the traditional PVinverter system, it not only do the maximum power tracking and output the maximumpower, but also output specified active and reactive power through the micro-gridcontroller. MATLAB simulation software is used to simulate three-phase invertersystem, analysis of the overall performance of the inverter system, and verify thefeasibility of design ideas.(4)Making a physical design of above model, building a fully required projectexperimental system, the system using TI’s TMS320F28335DSP as the core ofcontrolling, launch the major modules of each software design flow.