Compensation of voltage sags and swells using a single-phase AC-AC converter Conference Paper uri icon

abstract

  • In this paper, a topology to compensate voltage sags and swells simultaneously in critical loads is proposed. It consists in a single-phase AC-AC converter in a matrix arrangement, which keeps a continuous regulation in the output voltage. The proposed scheme has the capability to compensate up to 25%25 voltage sags and 50%25 voltage swells. Energy storage devices are not required by the AC-AC converter and it is connected between the AC mains and the load by using a series transformer. One of the advantages of this topology is that taps for the coupling transformer are no necessary to change the polarity of the compensation voltage. A four step switching technique is used to drive the AC-AC converter switches, executing snubber-less operation. The reference signal is generated using single-phase d-q theory, obtaining a fast response time and high regulation. Simulation and experimental results of a 5kW capacity, 127V, 60Hz equipment are presented. © 2004 IEEE.

publication date

  • 2004-01-01