Improvement of power quality with advanced power electronic equipment

The quality of electrical energy supply, especially voltage quality is becoming more and more important in both industrialized and developing countries. An insufficient supply quality can lead to an inadequate quality of products, interruption of important industrial processes and therefore to economic losses. The amount of equipment and industrial processes which are sensitive to insufficient voltage quality, such as harmonics and sags, is increasing. This paper describes the main power quality problems and their solution with IGBT PWM converter-based power conditioning equipment.