The integration of distributed generation (DG) based on renewable energy sources (RESs) are rapidly penetrating in the conventional power systems. Typically, an inverter is used as an interface unit to connect DG into the grid. Among the large installation of inverter units into the grid, this result the analysis of power systems becomes more complex. Moreover, the analysis with full function of inverter is facing many complex tasks for example a large computational time. Therefore, this paper introduces a new inverter model, which is developed by using the root mean square (RMS) value. By minimizing the complexity function of inverter, it results the proposed model in fast simulation. Since the model can represent the acceptable behavior, it can be utilized as the model in order to fast develop the control function, the optimization, management and economic function in vision of smart grid.
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