An AC-AC Power Converter for Mitigation of Voltage Disturbances in Three Phase System based on Characterization of Algorithm

Abstract

In this paper a versatile ac-ac power converter is proposed based on characterization of algorithm that can be utilized as a control device for Custom Power applications. The converter has the ability to regulate bus voltage through voltage sags. The dynamic voltage restorer is a definitive solution to address the voltage-related Power Quality problems. Conventional topologies operate with a dc link, which makes them bulkier and costlier; it also imposes limits on the compensation capability of the DVR. In the proposed scheme there is no storage device is employed, these topologies require improved information on instantaneous voltages at the point of common coupling and need flexible control schemes depending on these voltages. Therefore, a control scheme for DVR topologies with an ac-ac converter, based on the characterization of algorithms is proposed in this paper to mitigate voltage sags with phase jump. The proposed converter connected in three phase system in interconnected manner. The scheme is tested on an interphase ac-ac converter topology to validate its efficacy. Detailed simulations to support the same have been carried out in MATLAB, and the results are presented.