Design of a versatile three-phase AC line conditioner

This paper describes the design of a line conditioner for three phase AC-AC power conditioning. It is based on a three phase PWM AC-AC buck-boost power converter. It has several advantages in terms of size, weight, efficiency and performance over state-of-the-art line conditioners. Design specifications and relationships are presented. Analytical formulae for determining the efficiency of the line conditioner are presented. A controller design which features fast transient response is developed. Operation of the line conditioner in the presence of voltage sags and surges, load addition and rejection is illustrated by means of simulation. Experimental results verifying the operation of the power circuit are also presented.