Research On Photovoltaic/Battery Hybrid Power Generating System

With the increasing depletion of fossil fuels and the growing problem of environmental pollution, developing new energy sources is necessary to ensure energy supply, Solar, with its many advantages, come out ahead in the development and utilization of new energy.In this paper, a kind of Photovoltaic/Battery Hybrid Generation System has been researched in its topology structure and controlling scheme,The system, whose kernel power supplies are the solar pond boards and the batteries, can work on grid-connected mode or run independently according to the grid situation. Firstly, the two-stage topology structure is analyzed, the main circuit is constituted by DC/DC circuit, DC/AC circuit and the LCL filter, then Article focuses on the key technologies of the system, including the design of power circuit and control circuit, maximum power point tracking technology of Solar pond board, charge-discharge technology of battery,as well as the on-grid and off-grid control based on SVPWM control strategy. At last, the prototype was produced and tested. Test result has proved feasibility of circuit topology structure and controlling scheme and shown correctness of system parameters.