Multi-Mode Power Management for Grid-Connected Photovoltaic System using Indirect Current Control Strategy

Integration of solar photovoltaic systems with the contemporary utility grid through the power electronic converters presents a new challenges and opportunities for providing ancillary services. Ancillary services include addressing energy need and rising power quality (PQ) issues. This scenario demands various control mechanisms to be embedded in the controller to provide above mentioned services. This paper presents an indirect decoupled current controller for multi-mode real and reactive power support to the grid. The proposed system works in three different modes as: 1) Excess power mode 2) Sufficient power mode and 3) Deficit power mode appropriate. The simulation model is developed for validating the proposed control logic under perturbing load condition and insolation change.