The Research On The Control Technology For The Inverters In Distributed Generation Grid-connected System

Recent years, people pay more attention to the distributed generation. The distributed generation uses renewable clean energy, such as the solar energy, the wind power, the tidal energy and so on. It has not only protected the environment, saved the energy, but also made the energy which we can use diversely. First, the paper has studied the topology and mathematical model in distributed generation grid-connected systems. Second, it has chosen instantaneous reactive power theory and hysteresis control strategy. Then, it has obtained a grid-connected system. This grid-connected system can provide not only active power, but also reactive power and harmonic current which the local load produced. Third, the simulation model of the main circuit and control circuit has been built in MATLAB. In this model, three work modes have been analyzed and researched. The conclusion has validated the reliability and validity of this grid-connected system. Finally, it has discussed something about the realization method with software.