Abstract
With worldwide lack of energy sources and the proliferation of fossil oil contamination, many countries around the world are actively searching for new green and renewable energy sources as a priority. By the virtue of unique characters and advantages, the solar source is provocative of those renewable sources. Among the application of solar source, the grid-connected solar energy generates electricity system are turning to the main form of the solar energy application.
The grid-connected solar energy generate electricity system can transform solar energy into electricity energy through the solar cell board, and can change the direct current(DC) into alternating current(AC) which has the same frequency and phase with the grid, and feed back to the grid. When the sunlight is sufficient, the load can be powered by solar energy, without drawing any energy from the grid. At the time that sunlight is not sufficient to generate enough power for the load, the control system will automatically take action to draw energy from the grid to overcome the shortage.
The core technology of grid-connected solar electric system exists in the design of the grid-connected convertor, whose efficiency and reliability will influence the performance of the whole system. So, an efficient converter suiting for grid-connected solar energy station is proposed in the thesis.
The paper first proposed a system design of the 1kw solar energy Grid-Connected Converter, and then conducted a analysis to the system’s working principle and control strategy. The article also elaborated the maximum power point tracking (MPPT) technology the Phase Lock Technique, at the same time using the MATLAB software to simulate the single phase solar energy grid-connected system
