Parallel inverter control in the Distributed Power System

With the proliferation of alternate power sources such as fuel cells system in the distributed power system, inverter is the key component of the system. Parallel inverter systems can be designed to have the advantages to improve output power and reliability etc. In order to share the load and restrain circumfluence, A power sharing control technique for inverter parallel operation is described in detail in this paper. With measuring and analyzing the instantaneous current and voltage of each inverter, the current and voltage fundamental wave components are used to control and regulate the amplitude and the phase of the output voltage through calculation of active and reactive power. In this way, a transform matrix T is used to modify the active and reactive power to restrain circumfluence. As a result, the control of power sharing in the inverter can be accomplished and the amplitude and phase output voltage will hold steadily. At the end, the control scheme is implemented to verify that the analysis is available and efficient with high practicality.