Abstract
The goals of this study are to ensure simultaneously a good control of energy injection into the network and power quality enhancement. Firstly, the injection mode of different levels of active power via the solar inverter is achieved through intelligent artificial controller. Then, to obtain a sinusoidal grid current waveform, it is proposed to compensate unwanted lower current harmonics caused by the nonlinear load connected at the NCP (Network Coupling Point) by active filtering strategy. Note that, the harmonics produced by the VSI (Voltage Source Inverter) converter due to its switching action are suppressed by a low-pass passive damping LCL-filter. The obtained network current is well filtered, it has a sine waveform and therefore its calculated THD is less than 5% that is verified the IEEE Std 5192014, recommended harmonic limits for current distortion in electrical systems.