Presentation Details
| A Flyback-Based MISO DC--DC Architecture for Vehicle-Integrated Photovoltaic Systems Sebastián Rodríguez-Romero1, 3, Jorge Rabanal-Arabach1, 3, Edward Fuentealba-Vidal1, 3, Mauricio Trigo-Gonzalez1, 3, Alejandro Stowhas-Villa2, 3, Fernando Castro-Gallardo1, 3, Christian A.Rojas2, 3. 1Universidad de Antofagasta, Antofagasta, Chile.2Universidad Técnica Federico Santa María, Antofagasta, Chile.3Solar Energy Research Center, Antofagasta, Chile |
Abstract
This paper investigates a Flyback-based Multi-Input Single-Output (MISO) DC-DC converter featuring active-clamp cells as a high-performance interface for Vehicle-Integrated Photovoltaic (ViPV) systems. Urban electric buses operate under constrained conditions characterized by non-uniform irradiance and limited roof surface, which typically degrade energy harvesting in conventional centralized architectures. To address this, the proposed topology aggregates power from distributed PV modules into a shared high-voltage DC bus, providing galvanic isolation and enabling soft-switching operations to recycle leakage energy and maximize efficiency. A comprehensive small-signal state-space model is derived to explicitly quantify the dynamic cross-coupling between input branches introduced by the common output node, facilitating robust controller design. The system's performance is validated through time-domain simulations in PLECS of a 0.7 kW, 160 V two-input implementation, driven by irradiance and temperature profiles experimentally recorded on a test vehicle. Control is achieved via a localized Perturb-and-Observe (P&O) MPPT algorithm combined with PI-based DC-bus voltage regulation. Results under severe irradiance mismatch scenarios demonstrate that the converter maintains strict DC-bus regulation with well-damped transients, effectively redistributing power loads while achieving steady-state efficiencies exceeding 95%. These findings confirm the MISO Active-Clamp Flyback architecture as a compact, efficient solution capable of mitigating partial shading effects in next-generation electric mobility applications
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