A Three Phase Voltage Restorer Based on Bipolar Direct AC/AC Converters

A new topology is proposed to regulate voltage sags/swells in distribution network this paper. Voltage sags and swells are a serious power quality problem faced by the industry. The major traditional restorer, based on energy storage device, not adequate for compensating deep long-duration sags/swells. To solve problem, novel bipolar direct AC/AC type restorer (AC/AC-VR) that both with regulation ability needs no device. of each phase connected other two phases tapped from them. By controlling duty cycle converter, required realized maintain stability. Analysis, simulation, experimental results presented demonstrate topology.