Research on the Novel Grid-Connected System of Distributed Generation

The grid-connected operating mode of distributed generation (DG) is now the trend of the development of DG. In this paper, the topology and mathematical model of a grid-connected system of DG are studied deeply, instantaneous reactive power theory and hysteretic comparison control strategy have been chosen, and a grid-connected system is got which can send the active power to the grid, compensate harmonic and absorb the reactive power that the local loads generated. Then the simulation models of main circuit and control circuit of the grid-connected system of DG have been established using MATLAB, and the two different filter modes of the grid-connected system are analyzed and simulated which verified the grid-connected system reliable and valid.