2026-04-17T15:49:21Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4462912026-02-07T02:33:12Zcom_2072_1033col_2072_452950

A soft switched three level quasi z-source converter with coupled Inductor based high converter ratio and continuous input current for renewable energy application Convertidor quasi-Z de tres nivells de commutació suau amb una alta relació de convertidor basada en inductor acoblat i corrent d'entrada continu per a aplicacions d'energia renovable Conversor cuasi-fuente Z de tres niveles con conmutación suave, basado en inductor acoplado, de alta relación de conversión y corriente de entrada continua para aplicaciones de energía renovable Hamed, Moradmand Jazi Rahimzadeh Khorasani, Ramin Fani, Rezvan Adib, Ehsan Zanchetta, Pericle Wheeler, Patrick Alonso Álvarez, José Marcos Velasco Quesada, Guillermo Martínez García, Herminio Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica Universitat Politècnica de Catalunya. EPIC - Energy Processing and Integrated Circuits Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència Switches Voltage Inductors Stress Soft switching High-voltage techniques Capacitors Low voltage DC-DC power converters Zero voltage switching © 2025 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. In this paper, a fully soft switched high step up three level converter based on a Quasi-impedance source is introduced for use in photovoltaic applications. In the proposed converter, since an active switch is used instead of the diode in the impedance network, conduction loss associated with the diode is reduced, and Zero-voltage- switching characteristics are provided in a wide range of output power for power switches, resulting in the improvement of efficiency. The proposed converter takes advantage of three level structure and it experiences much lower voltage stress on semiconductor elements compared to existing high step-up structures. This allows the use of MOSFETs with lower on the resistance, leading to reduced conduction losses and cost. Furthermore, the boost inductor in the input section not only maintains continuous input current, avoiding the need for bulky input capacitors, but also significantly optimizes power density and reduces cost. Other advantages of the proposed converter include high voltage gain with low duty cycle and the ability to turn off all diodes under ZCS condition. Experimental results from a 200-W laboratory prototype are provided to validate the proposed converter's performance. This work was supported in part by the Spanish Ministerio de Ciencia e Innovación (MICINN)-Agencia Estatal de Investigación (AEI) and in part by “ERDF/EU” by project PID2022-138631OB-I00, and the Pla de Doctorats Industrials of the Secretaria d’Universitats i Recerca del Departament d’Empresa i Coneixement de la Generalitat de Catalunya by grants 2022 DI 037 and 2022 DI 028. Postprint (published version) 2025-10-13 Article Hamed, M. [et al.]. A soft switched three level quasi z-source converter with coupled Inductor based high converter ratio and continuous input current for renewable energy application. «IEEE Transactions on power electronics», vol. 41, no. 41, p. 6007-6025. 1941-0107 https://hdl.handle.net/2117/446291 10.1109/TPEL.2025.3620744 eng https://ieeexplore.ieee.org/document/11202398 http://creativecommons.org/licenses/by/4.0/ Open Access Attribution 4.0 International application/pdf Institute of Electrical and Electronics Engineers (IEEE)