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Reactive power control of single phase grid tied Voltage Sourced Inverters for residential PV application

This paper introduces a reactive power control method for a grid tied single phase Voltage Sourced Inverter (VSI), which is used for residential photovoltaic (PV) power integration. The focus is on designing a low complexity grid synchronization method, which decouples the active and reactive power component so that each component can be controlled independently. The AC current and DC voltage controllers for the VSI are briefly discussed. The design and analysis of the grid synchronization method are described in detail. Experimental results validate the effectiveness of the controller and the reactive power control ability.