Combined Step Size Algorithm Based Grid Connected PV-DSTATCOM System

In order to address the power quality challenges that arise in a photovoltaic (PV) connected distribution system, this paper suggests a combination step-size Affine projection sign (CS-APS) method in dual mode. In one mode, it acts as a PV-DSTATCOM to take care of smooth power flow to the grid integrated system, while in another, it functions as a DSTATCOM when irradiation is unavailable and raises the system’s overall power quality. The active and reactive components of the harmonic enhanced load current are extracted using the CS-APS technique. In order to avoid the trade-off between convergence rate and steady-state error, this algorithm employs two alternative step sizes. The unit templates are generated from the grid voltage. Following that, reference grid currents are produced using these unit templates. The parameters of the DC loop controller are further modified using a fractional order PI controller. The reactive power need of the non-linear load is met by a shunt connected voltage source converter (VSC) at the load side that also serves as a distributed static compensator (DSTATCOM). In order to maintain a consistent voltage on the DC side of the VSC, a reference voltage is provided using the P&O maximum power point (MPP) approach. The proposed system has the ability to efficiently manage PV power generated in accordance with load requirements.