Power Factor Compensation on DistortedLow Voltage Power Systems

[摘要] Harmonic resonance has become a major hurdle for performing power factor compensation in commercial power systems, due to the proliferation of harmonic producing-loads. This paper presents an intelligent controller for power factor compensation that can perform power factor correction under varying demand conditions without exciting harmonic resonance. Practical and robust control algorithms are proposed using micro-controller. The controller relies on common low cost sensing devices and hence can be constructed as a retrofitting device to replace existing power factor correction controllers.

[关键词] Capacitor switching;power electronic inverters;harmonic resonance;power factor compensator;transformers;Power Width Modulator(PWM).