A high gain Z-source boost DC–DC converter with common ground for solar PV applications
Morey M. Golla M. Garg M.M. Gupta N. Kumar A.
July 2024Elsevier Ltd
Electric Power Systems Research
2024#232
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 converters 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.
DC–DC converter , High voltage gain , Solar photovoltaic applications , Z-network
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Department of Electrical Engineering, Malaviya National Institute of Technology, Rajasthan, Jaipur, 302017, India
Department of Electrical Engineering, Indian Institute of Science, Bangalore, India
Department of Electrical and Computer Engineering, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Electrical Engineering, Punjab Engineering College, Chandigarh, 160012, India
Department of Electrical Engineering
Department of Electrical Engineering
Department of Electrical and Computer Engineering
Department of Electrical Engineering
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