Design and Implementation of Soft Switching Three-port High Step-Up DC-DC Converter for Solar Energy Applications

Subject Areas : Semiconductor devices

Somaye  Gashtasebi ¹ (Department of Electrical Engineering- Najafabad Branch, Islamic Azad University, Najafabad, Iran)
Fariborz  Haghighatdar Fesharaki ² (Smart Microgrid Research Center- Najafabad Branch, Islamic Azad University, Najafabad, Iran)
Seyed Mohammad Mehdi  Mirtalaei ³ (Smart Microgrid Research Center- Najafabad Branch, Islamic Azad University, Najafabad, Iran)

Received: 2022-12-05 Accepted : 2023-04-01 Published : 2024-11-21

Keywords: Converter, photovoltaic cell, soft switching, high-voltage gain,

Abstract :

In recent few decades, due to various reasons, including energy crisis and environmental problems, renewable energy sources such as wind energy, solar systems and fuel cells have received much attention. Solar or photovoltaic systems are one of the most widely used renewable energy sources that have a low output voltage. For this reason, research on dc-dc converters has increased in recent years. In this paper, a non-isolated high voltage gain converter with three input-output ports is proposed. This converter provides two separate paths for power flow from each input source to the output load. In order to reduce the number of converter components, some components play multiple roles. Therefore, the energy storage device (battery) will charge with the same components used to transfer the power to the load. In this converter, to increase the voltage gain, the coupled inductor technique is used. Moreover, to reduce the leakage inductance as well as achieving the soft switching condition, two active clamps are used. Since the voltage across the switches is limited, the switches can be used with low voltage stress and thus low conduction losses. In this converter, the ripple of the input current will reduce by adding an inductor at its input. This has a significant impact on the performance and the lifespan of the solar cells. The various operational modes of the converter are discussed and the designing considerations are presented. A prototype of the proposed converter is simulated to supply a 130 W, 330 V load with a switching frequency of 50 kHz, in OrCAD software. Finally, a laboratory sample is implemented and the theoretical analysis are validated by the practical results. 

References:

[1] R. Faraji, H. Farzanehfard, "Soft-switched non-isolated high step-up three-port dc-dc converter for hybrid energy systems", IEEE Trans. on Power Electronics, vol. 33, no. 12, pp. 10101-10111, Dec. 2018 (doi: 10.1109/TPEL.2018.2791840).

[2] R. Faraji, H. Farzanehfard, G. Kampitsis, M. Mattavelli, E. Matioli, M. Esteki, "Fully soft-switched high step-up non-isolated three-port dc-dc converter using GaN HEMTs", IEEE Trans. on Industrial Electronics, vol. 67, no. 10, pp. 8371-8380, Oct. 2020 (doi: 10.1109/TIE.2019.2944068).

[3] R. Faraji, E. Adib, H. Farzanehfard, "Soft-switched non-isolated high step-up multi-port dc-dc converter for hybrid energy system with minimum number of switches", Electrical Power and Energy Systems, vol. 106, pp. 511-519, March 2019 (doi:10.1016/j.ijepes.2018.10.038).

[4] K.R. Kothapalli, M.R. Ramteke, H.M. Suryawanshi, N.K. Reddi, R.B. Kalahasthi, "A coupled inductor based high step-up converter for dc microgrid applications", IEEE Trans. on Industrial Electronics, vol. 68, no. 6, pp. 4927-4940, June 2021 (doi: 10.1109/TIE.2020.2992019).

[5] K. Zaoskoufis, E.C. Tatakis, "Isolated ZVS-ZCS dc-dc high step-up converter with low-ripple input current", IEEE Journal of Emerging and Selected Topics in Industrial Electronics, vol. 2, no. 4, pp. 464-480, Oct. 2021 (doi: 10.1109/JESTIE.2021.3063913).

[6] M. Shahabi, S.H. Fathi, S. Salehi-Dobakhshari, "A novel SEPIC-based quasi-resonant high step-up dc/dc converter with soft-switching", Proceeding of the IEEE/PEDSTC, pp. 1-7, Tabriz, Iran, Feb. 2021 (doi: 10.1109/PEDSTC52094.2021.9405865).

[7] G. Zhou, Q. Tian, L. Wang, "Soft-Switching High Gain Three-Port Converter Based on Coupled Inductor for Renewable Energy System Applications", IEEE Trans. on Industrial Electronics, vol. 69, no. 2, pp. 1521-1536, Feb. 2022 (doi: 10.1109/TIE.2021.3060614).

[8]  K. Varesi, S.H. Hosseini, M. Sabahi, E. Babaei, S. Saeidabadi, N. Vosoughi, "Design and analysis of a developed multiport high step-up dc-dc converter with reduced device count and normalized peak inverse voltage on the switches/diodes", IEEE Trans. on Power Electronics, vol. 34, no. 6, pp. 5464-5475, June 2019 (doi: 10.1109/TPEL.2018.2866492).

[9] P. Mohseni, S.H. Hosseini, M. Sabahi, T. Jalilzadeh, M. Maalandish, "A new high step-up multi-input multi-output dc-dc converter", IEEE Trans. on Industrial Electronics, vol. 66, no. 7, pp. 5197-5208, July 2019 (doi: 10.1109/TPEL.2018.2866492, July 2019).

[10] B. Zhu, Q. Zeng, Y. Chen, Y. Zhao, S. Liu, "A dual-input high step-up dc-dc converter with ZVT auxiliary circuit",  IEEE Trans. on Energy Conversion, vol. 34, no. 1, pp. 161-169, March 2019 (doi: 10.1109/TEC.­2018­.28­76303).

[11] M. Dhivya, P. Shanmugapriya "A high step-up three-port SEPIC & zeta converter for stand-alone photovoltaic systems", Proceeding of the IEEE/ICCPEIC, pp. 419-424, Melmaruvathur, India, April 2016 (doi: 10.1109/ICCPEIC.2016.7557267).

[12] H. Khoramikia, M. Heydari, S.M. Dehghan, "A new three-port non-isolated dc-dc converter for renewable energy sources application", Proceeding of the IEEE/ICEE, pp. 1101-1106, Mashhad, Iran, May 2018 (doi: 10.1109/ICEE.2018.8472538).

[13] D.B.S. Alves, P. Praca, D.S. Oliviera, L.H. Barreto, L.C.G. de Freitas, "A single-stage three-port boost converter with high voltage gain based on the bidirectional version of the three-state switching cell", Proceeding of the IEEE/APEC, pp. 1934-1940, Cahrlotte, NC, USA, March 2015 (doi: 10.11­09/A­PEC.­20­15.­7104611).

[14] Z. Saadatizadeh, E. Babaei, F. Blaabjerg, C. Cecati, "Three-port high step-up and high step-down dc-dc conventer with zero input current ripple", IEEE Trans. on Power Electronics, vol. 36, no. 2, pp. 1804-1813, Feb. 2021 (doi: 10.1109/TPEL.2020.3007959).

[15] M. Shahsavari, S.M.M. Mirtalaei, "Design and implementation of a non-isolated multi-port converter with high voltage gain", Journal of Intelligent Procedures in Electrical Technology, vol. 12, no. 46, pp. 33-48, Summer 2021 (in Persian), (dor: 20.1001.1.23223871.1400.12.2.3.1).