Modeling and Power Quality Analysis of Grid-Connected PV Inverter with Active and Reactive Power Injection Mode

A critical search is needed for alternative energy sources to satisfy the present day’s power demand because of the quick utilization of fossil fuel resources. The solar photovoltaic system is one of the primary renewable energy sources widely utilized. Grid-Connected PV Inverter with reactive power capability is one of the recent developments in the field. These types of inverters can produce reactive power in the absence of solar irradiations; also, if necessary, the inverter can operate with reactive power mode even if the P.V. power is available. The reactive power is generally required for the grid voltage regulation and to maintain the power factor, which improves the power handling capability of the system. Also, in a hybrid energy system, the induction type wind generator demands a large amount of reactive power. In this work, the reactive power capability of a grid-connected P.V. inverter has been investigated. The active and reactive power to be injected into the grid is enabled by its reference value and controlled independently. The Power quality study has been carried out for both modes of operation as a simulation. The same conditions also verified in real-time in 75 kW Solar P.V. system