Ganji Jhansi Rani, Pavan Kumar
Distributed generation (DG) systems are interfaced with the electrical power network most commonly by means of power electronic converters. This paper deals with a single-phase inverter for DG systems which require improvement in power qualities, such as harmonic elimination and reactive power compensation for grid-connected operation. The main theme of the projects is to integrate the DG system with shunt active power filter capabilities. By using this technique, the inverter controls the active power flow from the renewable energy source to the grid and also performs the nonlinear load current harmonic compensation by keeping the grid current nearly sinusoidal. The power quality control strategy employs a current reference generator based on sinusoidal signal integrator and instantaneous reactive power (IRP) theory together with a dedicated repetitive current controller. Simulation of the power quality control scheme based inverter is carried out for 4-kVA inverter.
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