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Series connected photovoltaic power inverter

Abstract:

In this paper we introduce a series connected photovoltaic inverter that delivers both real and reactive power to a consumer load. It operates in series with the grid supply and injects power to the load along with the grid. Since the installed PV capacity is less than the load, the grid real power supply drops by an equivalent amount thereby resulting in energy savings. The inverter can also provide reactive power compensation so that the load voltage is kept constant even when the grid voltage fluctuates by around 6% of its rated voltage. The inverter serves a dual purpose during nighttime, when the circuitry is configured as a reactive power compensator. This way the proposed inverter is used to provide voltage compensation to the load all the time throughout day and night. © 2008 IEEE.