Design and Simulation of a Cascaded Control Strategy for a MISO/TAB DC-DC Converter: Comparative Study of Two Topologies

This paper presents the design, modeling, and simulation of a cascade control strategy with proportional-integral (PI) controllers for a multiple input single output (MISO) DCDC converter with Triple Active Bridge (TAB) topology. The behavior of the system is analyzed under three control schemes: a conventional one with split PI control, and two alternative schemes called Input Position Control (IPC) and One Controller per Input (OCI). The validation is performed in Matlab/Simulink under variable load and input voltage conditions, using metrics such as rise time, overshoot, stabilization time, root mean square error, and efficiency. The results show that the OCI scheme offers the best overall dynamic response and conversion efficiency, followed by conventional PI control. This study contributes to the development of robust and efficient controllers for multiinput converters applicable in DC microgrids, hybrid storage, and electric vehicles.