Modeling and Matlab Simulation of the Inverter Based on Bond Graph

The multi-mode operation of inverter brings great challenges to the modeling of wind power generation system. Regarding the discontinuities and hybrid characteristics of switching in the inverter, this paper uses nonlinear resistive elements to perform equivalents. Based on bond graph theory, the model of inverter is constructed and the unified modeling is realized. With the help of Matlab simulation platform, a simulation model is established under the proposed module construction method. The simulation results show the capability of bond graph theory to overcome the problem of discontinuous state in hybrid systems, and nonlinear resistive elements equivalent to switching devices is demonstrated to be effective. In addition, the module construction method is proved to be convenient and practical when establish the bond graph simulation model.