Soft-Switched Ultrahigh Gain DC–DC Converter With Voltage Multiplier Cell for DC Microgrid

Kothapalli, Koteswara Rao; Ramteke, M. R.; Suryawanshi, Hiralal Murlidhar; Reddi, Naresh Kumar; Kalahasthi, Rajesh Babu

doi:10.1109/tie.2020.3031453

Cited by 26 publications

(15 citation statements)

References 36 publications

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“…The converter reported in [13] demonstrated efficiencies close to the current converter with similar rated power. Though the calculated efficiency reported in [11] was greater than the proposed converter here, it has the ability of supplying constant power to the load. All the input ports to the converters of [11,13] were fed from external sources.…”

Section: Comparative Analysismentioning

confidence: 67%

“…Though the calculated efficiency reported in [11] was greater than the proposed converter here, it has the ability of supplying constant power to the load. All the input ports to the converters of [11,13] were fed from external sources. However, in the proposed modified Zeta-KY converter, one of the sources (battery) was charged by the converter itself through bidirectional charging.…”

Section: Comparative Analysismentioning

confidence: 67%

“…However, in the proposed modified Zeta-KY converter, one of the sources (battery) was charged by the converter itself through bidirectional charging. Furthermore, the control complexity and the inductive components used in these converters of [11,13] were larger. The calculated efficiency went down at higher duty cycles in these converters, but it was not the case in the proposed converter.…”

Section: Comparative Analysismentioning

confidence: 99%

“…Khaligh et al proposed [10] a multi input bidirectional boost multiport converter for power harvesting by a three-port system. Multiport dc-dc converters (shown in Figure 1b) were designed for renewable energy systems [11][12][13] to demonstrate high performance gain, but had separate controllers. A single multiport converter with different controllers would make the circuitry more complex.…”

Section: Introductionmentioning

confidence: 99%

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Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications

et al. 2021

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This paper proposes a three-port Zeta-KY dc-dc converter which is fed with hybrid sources like photovoltaic (PV) cells and batteries. The converter proposed here is a multi-input single-output (MISO) structure which harnesses the benefits of Zeta and KY converters. The combination of these converters is highly advantageous since the Zeta converter provides lesser output voltage ripples with high gain and the KY converter topology suits well for withstanding load transients. The KY converter used in this research work is subjected to a topological change to facilitate bidirectional power flow. The bidirectional flow is essential to save the excess power in PV source in batteries during low load conditions. This novel multiport topology with bidirectional facility is first of its kind and has not been discussed earlier in the research arena. In the proposed work, two control algorithms are developed and deployed: the first one ensures the maximum power extraction from the PV and the second one maintains constant dc bus voltage and manages bidirectional power flow. MATLAB Simulink and hardware prototype of the proposed system has been realized for a 72 V dc bus and a 500 W electric vehicular drive. The simulation and experimental results reveal that the proposed system is viable for medium power electric shuttle applications. The proposed system is subjected to various test cases and it is observed that the source and load intermittencies are catered very well by the proposed three port Zeta-KY converter. The developed multiport converter is feasible for renewable energy applications.

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Section: Comparative Analysismentioning

confidence: 67%

Section: Comparative Analysismentioning

confidence: 67%

Section: Comparative Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications

et al. 2021

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“…High-voltage-gain converters, especially those in topologies with a common input and output ground, can be applied in low-power photovoltaic systems where the conversion of energy from a low-voltage photovoltaic (PV) string to the grid requires significant voltage boost. Other applications, where the proposed converter could be better suited, can be found in fuel cell energy harvesting systems in automotive applications or DC microgrid systems [3]- [4], as well as in high-intensity discharge lamp supply units in vehicle headlights.…”

Section: Introductionmentioning

confidence: 99%

High-Gain Switched-Capacitor DC-DC Converter With Low Count of Switches and Low Voltage Stress of Switches

et al. 2021

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This paper presents a novel concept of a high-voltage-gain DC-DC converter. The converter is made up of switched capacitors and passive resonant branches. A significant reduction in the count of switches and low voltage stress on the switches is achieved in this proposed converter topology, in comparison to that of a classical SC series-parallel converter. It is essential from the cost, volume, and efficiency of the converter standpoint. The reduction in the count of switches is threefold. The highest voltage stress on the switches depends on the output voltage and is decreased in the proposed converter as well, as the output voltage is divided into two series-connected capacitors. The presented results demonstrate the operation of the converter with the use of resonant branches, its switching strategies, voltage stresses of switches, efficiency, voltage gain, and output voltage regulation as well as the zero-voltage switching (ZVS) operation. The paper also presents novel issues related to analytical loss modeling, extended concepts of topology, converter start-up, and operation during transient states. The demonstrated concept of the converter, the analytical discussion and its design, as well as the experimental setup and results clearly demonstrate the optimization achievements.INDEX TERMS Boost converters, DC-DC converters, High voltage gain converter, Switched-capacitor converter.

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A voltage lift‐based high‐gain DC‐DC converter with low input current ripple

Singh

Tolani

2023

Circuit Theory & Apps

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The switched‐inductor‐based voltage lift converters offer high voltage gain. However, their input current has step changes due to switched‐inductor configuration and is peaky due to the voltage lift capacitor charging current. This article proposes a new high‐gain DC‐DC converter where an additional boost converter cell is incorporated in a conventional voltage lift boost converter to charge the voltage lift capacitor with a constant current, avoiding a peaky charging current from the supply. The operating principle of the proposed converter demands phase‐shifted switching signals to achieve high voltage gain and reduce ripple in the input current. High‐gain, continuous input current, positive output voltage, common ground between input and output ports, and low voltage stress on active switches are the major characteristics of the proposed converter. The operating principle, steady‐state analysis, and control design have been discussed in detail. A 200 W, 30 V/300 V, and 50 kHz laboratory prototype is developed to validate the operation of the proposed converter.

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Soft-Switched Ultrahigh Gain DC–DC Converter With Voltage Multiplier Cell for DC Microgrid

Cited by 26 publications

References 36 publications

Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications

Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications

High-Gain Switched-Capacitor DC-DC Converter With Low Count of Switches and Low Voltage Stress of Switches

A voltage lift‐based high‐gain DC‐DC converter with low input current ripple

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