An Improved Quasi-Z-Source DC-DC Converter with Continuous Input and Output Currents

This article proposes an improved quasi-Z-source DC-DC converter (IqZSC) for a power conversion from low voltage sources (batteries, solar photovoltaic and fuel cells). It gives continuous input and output currents with less ripple due to presence of inductors at the input and output ports, unlike t...

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Bibliographic Details
Published in2023 IEEE 3rd International Conference on Smart Technologies for Power, Energy and Control (STPEC) pp. 1 - 5
Main Authors Bussa, Vinod Kumar, Yalla, Tirumala Rao, Bussa, Vinusha, Yalla, Naveen, Kobaku, Tarakanath, Jeyasenthil, R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 10.12.2023
Subjects
and Z-source converter
Continuous current
DC-DC power conversion
DC-DC power converters
Electromagnetic interference
Low voltage
low voltage energy sources
Mathematical models
Steady-state
Stress
Voltage control
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Summary:This article proposes an improved quasi-Z-source DC-DC converter (IqZSC) for a power conversion from low voltage sources (batteries, solar photovoltaic and fuel cells). It gives continuous input and output currents with less ripple due to presence of inductors at the input and output ports, unlike the basic quasi-Z-source converter (qZSC). Due to low ripple input current, it is a better choice for getting longer life span of the voltage sources. Also, it has common grounded output to eliminate measurement issues and electromagnetic interference (EMI) issues. As the IqZSC is developed from the qZSC by rearranging elements, it has equal number of elements as that of qZSC, and has two controlled switches which are operating at the same instant. Steady-state mathematical modelling of IqZSC is given and a comparative analysis is done by considering similar Z-source converters. Simulation studied are discussed to show the performance of the proposed converter.
DOI:10.1109/STPEC59253.2023.10430784