A Topology-Morphing Series Resonant Converter for Photovoltaic Module Applications

Sergentanis, Grigorios; De Lillo, Liliana; Empringham, Lee; Johnson, C Mark

Abstract

Residential solar photovoltaic (PV) installations frequently use power optimizers to increase their energy production. In this application, the ability to regulate a wide range of voltage with high efficiency is highly desirable. Thus, this paper proposes a novel hybrid-controlled series resonant converter (SRC) for photovoltaic power optimizers. The converter utilizes the advantage of GaN devices, which have improved switching transition times compared to Si devices, hence providing a lower switching loss. Regulation is achieved with fixed-frequency PWM control on the secondary side, while ZVS and ZCS of the devices are achieved with the proposed resonant tank design. The proposed converter maintains high efficiency over a wide voltage range, making the PV system shade-tolerant while keeping the number of switching devices low. The paper presents the operating principles, the design methodology, and simulation results. The results show a high efficiency over a wide voltage range, as well as a wide load range.

Citation

Sergentanis, G., De Lillo, L., Empringham, L., & Johnson, C. M. (2022). A Topology-Morphing Series Resonant Converter for Photovoltaic Module Applications. In 2022 24th European Conference on Power Electronics and Applications (EPE'22 ECCE Europe)

• Conference Name: EPE 2022 ECCE Europe conference
• Conference Location: Hannover, Germany
• Start Date: Sep 5, 2022
• End Date: Sep 9, 2022
• Acceptance Date: May 3, 2022
• Online Publication Date: Oct 17, 2022
• Publication Date: Oct 17, 2022
• Deposit Date: Sep 23, 2022
• Publicly Available Date: Oct 17, 2022
• Publisher: IEEE
• Book Title: 2022 24th European Conference on Power Electronics and Applications (EPE'22 ECCE Europe)
• ISBN: 9781665487009
• Keywords: Resonant Converter; Boost; Photovoltaic; DC-DC converter; Efficiency
• Public URL: https://nottingham-repository.worktribe.com/output/11470791
• Publisher URL: https://ieeexplore.ieee.org/document/9907636
• Related Public URLs: https://epe2022.com/