Power quality improvement for distributed generation employing photovoltaic-inverter

Power quality problems such as variation of reactive power consumption and distorted current injection in distributed generation system can be compensated by a single-phase conditioner. The proposed conditioner works in feed forward mode and placed in parallel with the PV-inverters in the distributed generation system. A simple current extraction method is applied and an operating algorithm of the conditioner´s hysteresis current controller is implemented. The proposed conditioner is simulated using Simulink/Matlab. The simulation has shown that the current detection method and the hysteresis current control based on the proposed algorithms are worked well and capable to improve the quality of injected currents to the main grid system.