Abstract

DC-AC converters in PV grid-connected systems are for power conversion and the interface point to the grid. They are also the active power filters because of their ability to eliminate the harmonics in power systems and compensate the reactive power for the nonlinear loads connected to the grid. However, the active power filters present disadvantages to the grid. To overcome its drawbacks, the hybrid active filters are introduced but without a proper control strategy of active power, the passive part of the hybrid active filter requires a big size which causes the resonance problem between the inductance and the grid. In this paper, the modified p-q theory control strategy of active power filter is applied where MATLAB/Simulink gives a THD current of 0.97% which meet IEEE 519-1992 standards to connect solar PV systems to the grid.

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