Grid-inverter Control Strategy And Bus Communication Technology

With the increasing depletion of traditional fossil energy sources and the natural environment by increasing the degree of human contamination, so the research of renewable energy in recent years becomes a hot spot. Solar energy resources as clean and green, rich advantages gradually until utilization. Photovoltaic power generation most of which have practical value is the focus of current research and development.Firstly, the mathematical model of the inverter is analyzed and combined with domestic and foreign literature PV inverter system to analyze the number of control strategies. PI control strategy to make up for deficiencies on the feed forward control strategy to increase, then the control system analysis of the effects. To further improve the system of the periodic interference signals contain, in order to use composite control based on the binding Repeats Control Strategy. Using MATLAB 7.0 in the SIMULINK module of the proposed hybrid control algorithm detailed simulation, fully verify the control algorithm parameter design feasibility and rationality. And then describes the bus-based communication techniques to realize, first introduced the DSP-based controller SPI and SCI bus communication technology research and implementation. Based ARM solar dedicated communication protocol card research and realization methods, Allows users to network on the inverter operation status detection and control.Finally, inverter prototype by the inverter to run experiments detailed state data show that the algorithm's reliability and feasibility of the basic realization of the design requirements.