Research on Simulation Model for Integration of Controller and Inverter

Abstract

The simulation models of controller and inverter provided by micro-grid simulation software are separate ones. Fewer models develop in monotonous form and are complicated itself, physical meaning of each variable in the model is not clear. Simulation members are connected by a combination of series and parallel way, interaction between elements is not reflected or ignored, so the simulation results are distortion and less credibility which seriously hinder the application of Matlab/Simulink in micro-grid simulation. Considered various operating mode, used different coordinate transformation and the redefined voltage coordinates, an integrated simulation model of controller and inverter is designed which remove the influence of the electromagnetic coupling among the components. Simulation model is simplified so as to accelerate simulation speed. The model can be flexibly set in different operating modes and different modules in Matlab/Simulink which makes the operating mode of each micro-power be designed easier and more clearly. Results of micro-grid composed with integrated model can accurately reflect the variation of voltage, frequency, active power, reactive power etc. according to various disturbances in the various operating modes. Integrated model is demonstrated the effectiveness by results of the simulation ,which can also meet the requirements of micro-grid simulation