Three-phase load balancing and power factor correction using a pulse width modulated static compensator

The purpose of this thesis is to demonstrate that a pulse-width-modulated static compensator is capable of performing three-phase load balancing and power factor correction. An unbalanced load is analysed using sequence component theory and a mathematical solution found to satisfy the load balancing and power factor correction requirements. Two types of pulse-width modulation to implement this theory are investigated—sinusoidal pulse width modulation and current reference pulse width modulation. Control systems have been developed for both methods. Both methods have then been simulated using PSCAD/EMTDC software with the results analysed for dynamic response, steady state response and harmonic content.