DPC Method For Grid Connected Photovoltaic System Acts as a Shunt Active Power Filter Implemented with Processor in the Loop

In this work, a direct power control strategy is applied to control a photovoltaic system acting as a shunt active power filter. The main task of the presented system is to reduce harmonic currents and to ensure reactive power compensation. Ideally, the presented system needs to generate enough reactive and harmonic current to compensate the nonlinear load harmonic in the line. Therefore, to establish that, a DC-DC boost converter is used to interface the photovoltaic generator with the grid, which provides continuous power flow from the PV to the grid through a voltage source inverter. Moreover, a suitable control for both shunt active power filter and DC-DC boost converter are developed, in order to extract the maximum amount of power from the photovoltaic generator and reduce harmonic currents with insuring reactive power compensation. The co-simulation processor in the loop results show that the proposed control method can inject maximum available power of photovoltaic generator to the grid, compensates the load reactive power, low total harmonic spectrum are effectively achieved, tracks rapid variations of load, and keeps the DC-link voltage constant.