Electric-power-quality improvement using parallel active-power conditioners

A parallel active-power conditioner is proposed for electric-power-quality improvement. In the proposed conditioner, a three-phase voltage of high quality can be promised under various nonideal utility conditions, including utility undervoltage, overvoltage, outage, pollution and unbalance scenarios. A systematic procedure for the design of active-power conditioners is also provided. Test results have demonstrated the effectiveness of the method in improving electric-power quality on the load side. This approach also has the potential to be extended or integrated to other circuit designs.