Loss-Optimal Modulation for an MMC-Based Triple-Active-Bridge Topology
Year: 2025
Type: conference-paper
Abstract: This paper presents a loss-optimal modulation strategy for an MMC-based triple-active-bridge (TAB) converter that guarantees zero-voltage switching (ZVS). A switching pattern that blends penta phase-shift (PPS) and pulse-amplitude control (PAC) is proposed, and a generalized harmonic approximation (GHA)-based optimization is formulated to minimize total losses using device-calibrated switching and conduction loss models under power-balance and ZVS constraints. The optimization is solved offline over a grid spanning the operating space (power setpoints and dc-link voltages), and the resulting angles are stored in look-up tables for online deployment. Simulations demonstrate up to 44 % lower total losses than Phase-Shift Modulation and PPS, as well as lower conduction losses than PAC. In addition, the method expands the feasible operating region of the converter to power points that are not supported by PAC.
Authors: Diego Vera, Maurice Roes, George Papafotiou
Institution: Eindhoven University of Technology
Language: English
Topic: Advanced DC-DC Converters
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7128803635