Analysis of interference between each port in triple active bridge converter

The triple active bridge (TAB) DC/DC converter has attracted attention as a power converter for power distribution systems because it has a wide voltage range and bidirectional power transmission and electrical insulation capabilities. As a controller for the converter, the decoupling controller, which uses a front‐end compensator, has been proposed. However, the controller design is difficult because the parameters of the compensator change in response to the interference that occurs depending on the operating point. This paper proposes an evaluation method of the interference using a current contour map and the trajectory on a phase plane. As a result, it was shown that the interference intensity is decided depending on the direction of the reference value on the contour map.