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With the decreasing of fossil resources, the development and research on the new energy would become the hot spots in the future. As a new energy,solar energy will attract our attentions for its clean and rich. Grid-connected generation is the inevitable trend for the usage of the solar energy. PV industry develops quickly in recent years in China, while, also hangs behind the global advanced level. Based on the inventer’s topology, this paper focus on the PV generation theory, Maximum Power Point Tracking, islanding detection and grid feed-in process.In this paper, we will first analyze the current status and application of PV generation In and Out, the categories, configuration and relative standard of PV generation. Meanwhile,it provides the topology of the main circuit, and analyzes the operation status and calculates the main parameters.Secondly, based on the research of the PV cell, several common MPPT (maximum power point tracking) algorithms will be compared. Via applicating the perurbation and observation method to complish the MPPT, and we provides the detailed design and the simulation experiment.Lastly, after we analysised and researched the control method for grid-connecting, we decided to. We provide the detailed hardware and software design, use Matlab to simulate, and the experiment results show that the design and model are right.Finaly, the method of islanding detection will be detailed described. In this paper, Active frequency drift method is used to detect the islanding.Experiment platform has been constracted according to the requirment, and the waveform complies with standards.
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