Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Control Technique of Triple-Active-Bridge Converter and Its Effective Controller Design Based on Small Signal Model for Islanding Mode Operation
Authors Chano Jeon ; Kyoung-Wook Heo ; Myung-Hyo Ryu ; Jee-Hoon Jung
Page pp.192-199
ISSN 1229-2214
Keywords TAB (Triple-Active-Bridge) converter; DC distribution; Grid connected mode; Islanding mode; Small-signal model
Abstract In DC distribution systems, a TAB converter employing multiple transformers is one of the most widely used topologies due to its high power density, modularizability, and cost-effectiveness. However, the conventional control technique for a grid-connected mode in the TAB converter cannot maintain its reliability for an islanding mode under a blackout situation. In this paper, the islanding mode control technique is proposed to solve this issue. To verify the relative stability and dynamic characteristics of the control technique, small-signal models of both the grid connected and the islanding mode are derived. Based on the small-signal models, PI controllers are designed to provide suitable power control. The proposed control technique, the accuracy of small-signal models, and the performance of the controllers are verified by simulations and experiments with a 1-kW prototype TAB converter.