Active Power Control of DPC Based Operation of Three Phase Inverter Under Stand-Alone Mode

This paper presents the successful application of direct power control (DPC) based algorithm in the DC-AC conversion of a standalone system. This algorithm is successful at the smooth variation of active power in the standalone mode of operation of renewable power generating system. Thus, it can supply the variable nature of power demand. The algorithm also successfully rejects the variation of DC voltage at the input of the inverter. The power output of the inverter in this standalone mode is successfully maintained during this condition. So, it can be said that the DPC in the standalone mode, is flexible enough to adopt the fluctuation of the DC voltage. It has also been seen that the inverter operating with DPC-based control can deliver constant power at the load end even under fluctuating load impedance. The claims stated, in theory, are successfully justified in both simulation and real-time environment.