A New High-Gain, High-Efficiency SEPIC-Based DC–DC Converter for Renewable Energy Applications

Hasanpour, Sara; Forouzesh, Mojtaba; Siwakoti, Yam P.; Blaabjerg, Frede

doi:10.1109/jestie.2021.3074864

Cited by 44 publications

(23 citation statements)

References 29 publications

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“…Several new converter topologies have been discussed in [16] with the well-known Cockcroft-Walton voltage multiplier cell. A new single-ended primary inductor converter (SEPIC) is presented in [17] with a single switch is used to achieve high gain. Another new SEPIC converter with both buck and boost topology is presented in [18].…”

Section: Introductionmentioning

confidence: 99%

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

Khan

Zaid²,

Mahmood

et al. 2021

IEEE Access

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High gain dc-dc converters are used in several applications which include solar photovoltaic system, switch-mode power supplies and fuel cells. In this paper, an ultra-high gain dc-dc boost converter is proposed and analysed in detail. The converter has a gain of six times as compared with the boost converter. The high gain is achieved by utilizing switched inductors and switched capacitors. A modified voltage multiplier cell (VMC) with switched inductors is proposed. The converter has a single switch which makes its operation easy. Moreover, the voltage across the switch, diodes and capacitors are less than the output voltage which increases the overall efficiency of the converter. The converter performance in steady-state is analysed in detail and it is compared with other latest high gain converters. The working of the converter in non-ideal conditions is also discussed in detail. The loss analysis is done using PLECS software by incorporating the real models of switches and diodes from the datasheet. To confirm and validate the working of the proposed converter a hardware prototype of 200 W is developed in the laboratory. The converter achieves high gain at low duty ratios and its performance is found to be good in open and closed loop conditions. INDEX TERMSBoost Converter, DC Microgrid, Duty cycle, Ultra High Gain, Voltage stress Battery Fuel Cell High Gain DC-DC Converter Solar PV Cell Low DC Voltage (12-60V) High DC Voltage (200 -300V

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Section: Introductionmentioning

confidence: 99%

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

Khan

Zaid²,

Mahmood

et al. 2021

IEEE Access

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“…By combining the coupled inductor with some techniques, the voltage level can be increased significantly. These techniques include voltage lifting, 14,15 voltage multiplier, 16–20 switched capacitor, 21,22 and switched inductor 23 …”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][12][13] By combining the coupled inductor with some techniques, the voltage level can be increased significantly. These techniques include voltage lifting, 14,15 voltage multiplier, [16][17][18][19][20] switched capacitor, 21,22 and switched inductor. 23 Disadvantages of the coupled inductor include large inductor magnetization current, using half of the B-H curve of core, and increased current ripple at the primary winding.…”

mentioning

confidence: 99%

Theoretical and experimental evaluation of SEPIC‐based DC–DC converters with two‐winding and three‐winding coupled inductors

Mahmoudi

Ajami

Babaei

et al. 2022

Circuit Theory & Apps

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In this paper, an SEPIC‐based direct current–direct current (DC–DC) converter with high voltage gain and continuous input current is provided. Input current Continuity is a great advantage for renewable resources applications, and a small filter can be used in the output of these sources. Also in this paper, the effect of coupled inductor in three‐winding structure is discussed compared to the two‐winding coupled inductor. Precise analysis of converters based on two‐winding and three‐winding coupling inductors requires that the structures be similar so that the evaluation can be performed correctly. A comparison is performed between the two‐winding coupled inductor‐based converter and the improved converter to show the advantages of the proposed converter. All elements of the converter have been compared, and since both converters are different in terms of coupled inductor, complete analyses have been done in the field of calculating inductors. In addition to the features of the two‐winding coupled inductor converter, the proposed converter requires smaller coupled inductor to decrease the core size and increase the converter efficiency.

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“…However, the major drawback of the aforementioned converters is hard switching across the elements, which reduces efficiency. Later, soft‐switching techniques are implemented, in previous studies 30–32 . Single‐switch high‐efficient SEPIC converters based on coupled inductor and voltage multipliers are presented in Hasanpour et al, 30,31 where input current ripple is reduced and quasiresonance helps to achieve ZCS across switch, reducing switching losses across diodes.…”

Section: Introductionmentioning

confidence: 99%

“…Later, soft-switching techniques are implemented, in previous studies. [30][31][32] Single-switch highefficient SEPIC converters based on coupled inductor and voltage multipliers are presented in Hasanpour et al, 30,31 where input current ripple is reduced and quasiresonance helps to achieve ZCS across switch, reducing switching losses across diodes. However, the gain is still low.…”

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confidence: 99%

A single‐switch high‐gain DC–DC converter for photovoltaic applications

Kalahasthi

Ramteke

Suryawanshi

et al. 2021

Circuit Theory & Apps

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This article presents a high-gain DC-DC converter consisting of a quadratic boost converter and a voltage multiplier, which helps to lift up the voltage gain. The gain will be further enhanced by increasing the turn's ratio of the coupled inductor. The key features include ultrahigh gain, low voltage stress across switching devices, low input current ripple, and hence, it is preferably suitable for renewable energy applications. A passive clamp lowers the voltage stress across MOSFET, so allowing switch with lower R ds(on) reduces the system cost. Besides this, input inductor makes current continuous and reduces input current ripple. The reverse recovery problem of diodes also gets diminished with the usage of leakage energy of the coupled inductor. The operating principle with different modes of operation is also explained. Zero current switching (ZCS) turn-on is achieved for power switch, and ZCS turn-off is achieved for diodes, which helps to reduce the switching losses. This improves the overall system efficiency. A 250-W prototype is built up to validate the converter.

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A New High-Gain, High-Efficiency SEPIC-Based DC–DC Converter for Renewable Energy Applications

Cited by 44 publications

References 29 publications

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

Theoretical and experimental evaluation of SEPIC‐based DC–DC converters with two‐winding and three‐winding coupled inductors

A single‐switch high‐gain DC–DC converter for photovoltaic applications

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