4. Conclusions

Through this chapter, one can see the active filters capability for improving the power quality indexes due to their capability of producing, in almost real-time, controlled currents and voltages as verified through simulation results of the shunt active filter, series active filter, and the unified power quality conditioner compensating different power quality problems. Moreover, they play a key role integrating RENs to the power grid in a new concept of distributed generation (DG) systems, conditioning them to produce their maximum available energy through MPPT algorithms. Finally, the new concepts of virtual impedance algorithms allow connecting several active powers in the same power grid running autonomously in decentralized microgrids, in a similar way as the generation systems sharing the load power.
