In recent years, sensitive industrial and critical commercial loads have been increasing amount of focus on power quality due to various types of power quality (PQ) problems. To overcome such problems, utility companies have made efforts to improve the quality and reliability of their electric power to the consumers. Traditionally for problems originated on the utility side, the approach has been to work on the customer side to desensitize critical loads while cleaning up the circuit on the utility side. However, with the development of high power semiconductor devices, it has become possible...