A high gain Z-source boost DC�DC converter with common ground for solar PV applications

Morey, M and Golla, M and Garg, MM and Gupta, N and Kumar, A (2024) A high gain Z-source boost DC�DC converter with common ground for solar PV applications. In: Electric Power Systems Research, 232 .

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Abstract

This paper proposes a high-gain dc�dc converter with common ground utilizing a Z-source network for low voltage solar photovoltaic (PV) applications. This converter features a common ground and a high output�input voltage conversion factor at a low duty cycle. These converters find their most common application in grid-tied or stand-alone solar photovoltaic systems, particularly those with low output voltages that must be increased to the required level. The presented converter operating duty ratio is within 0�0.5 and maintains similar voltage stress on Z-network components since it employs the conventional Z-source configuration. The presented converter provides a common ground between source and load, unlike conventional Z-network converter. A type-2 closed-loop voltage controller and state�space average model evaluate the converter's dynamic behavior for reliable and steady performance. A laboratory hardware prototype of 250 Watts is built and low gate signals are generated by using a ARM cortex M4 Microcontroller (STM32F407VGT6). The experimental results confirm that the proposed converter, with a gain of 10.46 and a power of 250 Watts, has a maximum efficiency of around 93. The experimental results validates the effectiveness of the proposed converter under both constant and shifts in amounts of solar irradiation. © 2024 Elsevier B.V.

Item Type:	Journal Article
Publication:	Electric Power Systems Research
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Boost converter; Conversion efficiency; Electric loads; Solar power generation, Boost DC/DC converters; Common ground; Dc/dc converters; High gain; High voltage gain; Photovoltaic applications; Solar photovoltaic application; Solar photovoltaics; Z-network; Z-Source, Solar concentrators
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	08 Jul 2024 06:55
Last Modified:	08 Jul 2024 06:55
URI:	http://eprints.iisc.ac.in/id/eprint/84741

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