The Controller Design Method of Grid-connected Inverter Based on Reduced order Jacobian Matrix

In this paper, discrete model of three-phase grid- connected inverter was introduced. In order to restrain the bifurcation and ensure the stable operation of the system, the controller parameter design method based on reduced order Jacobian matrix was proposed. The controller parameters were designed. To proof the proposed method, Jacobian matrix eigenvalue traces diagram and bifurcation diagram of the three-phase grid-connected current were drawn. The three phase grid-connected current simulation has been completed based on PSIM. The results show that the proposed scheme was correct and feasible, the design difficulty of controller parameter was reduced largely.