Research On Family-type Photovoltaic Power Plant Control Technology

With the increasing depletion of traditional energy sources, new energy generation gradually get world wide attention, including solar photovoltaic power generation. With its many advantages to get more and more promotion, while the PV inverter as a new energy generation systems core components, their importance is self-evident. To take full advantage of solar energy, maximum efficiency of the solar energy into electrical energy,and to improve the reliability of inverter operation, stability and security, the in-depth research for the inverter main circuit topology and control strategy is important.Firstly, the paper analyzes the characteristics of solar energy resources and family-type photovoltaic power plant at home and abroad right now, explains the meaning of the article and the main work. Analysis and research on the basis of the theory to explain the development of family-type photovoltaic power plant experimental system of meaning, and the experimental system for detailed analysis.Secondly, the article describes the basic classification of photovoltaic cells and photovoltaic cells equivalent model, introduced off-grid photovoltaic power generation system and grid-photovoltaic power generation system, described in detail grid photovoltaic power generation system classification. Inverter topologies for a variety of comparative analysis to determine the topology of the experimental system.Then, the article on the family-type photovoltaic power plant control technology at all levels, conducted in-depth study. Including the structure and basic principles of Boost Circuit, MPPT control theory, the battery charge control, network-based systems and grid-control technology, off-grid system inverter control technology. Article on the photovoltaic cell characteristics, MPPT principle, charge control and battery sub-system and network from the network control of a Matlab simulation.Finally, In the theoretical analysis and simulation studies, based on the design of DSP-based control of two family-type photovoltaic power plant experimental system. Boost DC controller via photovoltaic cells to recharge the battery or photovoltaic cell is followed by the Boost boost inverter off-grid systems or grid. Article discusses the specific design of the system, and gives some experimental results of the experimental system and experimental analysis.