Multilevel voltage source power quality conditioner

Paper present different way for power quality conditioning. Different way means parallel connection of the sinusoidal voltage source with the network, therefore it is possible to "isolate" load from source and vice versa. Described conditioner makes possible to get: i) sinusoidal source current; ii) reactive power compensation; iii) load voltage stabilization; iv) balanced source in conditions of the unbalanced load. As sinusoidal voltage source, the four level cascade based VSC has been used. To confirm results of the theoretical analysis some experimental results were presented.