High step‐up DC‐DC converter with reduced voltage stress on devices

Babaei, Ebrahim; Jalilzadeh, Tohid; Sabahi, Mehran; Maalandish, Mohammad; Alishah, Rasoul Shalchi

doi:10.1002/etep.2789

Cited by 30 publications

(39 citation statements)

References 30 publications

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“…The Constant 0.6 in equation 1 is obtained by subtracting the nearest level constant 0.4 from 1. The values of switching angles α 1 to α 4 (for symmetric operation) and α 1 to α 6 (for asymmetric operation) can be obtained using (1). The other angles can be calculated concerning π using the sine wave symmetry.…”

Section: Simulation Of Ds-mlimentioning

confidence: 99%

See 1 more Smart Citation

A New Multilevel Inverter Topology With Reduced Power Components for Domestic Solar PV Applications

Prem¹,

Sivaraman²,

Almakhles

et al. 2020

IEEE Access

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Power electronic converters are used to nullify the input fluctuations from a solar photovoltaic unit due to intermittent solar irradiance and to make the terminal voltage grid compatible with desired frequency. The conventional two-level converters suffer from low power quality and high voltage stress. In this paper, a new multilevel inverter topology called Dual Source Multilevel Inverter (DS-MLI) with fewer power switches is proposed for solar PV power conversion systems. It is capable of operating in symmetric and asymmetric operating modes without the need for cascading. This reduces the switching components required to produce a given number of levels in the staircase voltage waveform. A closed-loop control algorithm is designed using the state-space averaging technique, and the dynamic behavior of the system under step change is assessed. The simulation is carried out in MATLAB environment. The experimental prototype of DS-MLI rated 1 kW is fabricated using FGA25N120-ANTD IGBTs, and an eco-sense made solar PV emulator is used for analyzing the performance of DS-MLI while interfacing with solar PV unit. The suggested scheme is compared with its conventional counterpart in the aspects of components required, cost and efficiency and the results are presented INDEX TERMS DS-MLI, Multilevel inverter, Solar PV, Power Conversion, Fundamental frequency switching.

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Section: Simulation Of Ds-mlimentioning

confidence: 99%

“…With the advent of technology, the price of the solar PV panels and the associated accessories has reduced drastically over the years [1]. This resulted in tremendous growth in the installed capacity from 50 GWp in 2010 to 633 GWp in 2019 around the world [2].…”

Section: Introductionmentioning

confidence: 99%

A New Multilevel Inverter Topology With Reduced Power Components for Domestic Solar PV Applications

Prem¹,

Sivaraman²,

Almakhles

et al. 2020

IEEE Access

View full text Add to dashboard Cite

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“…High input current ripple is the most important problem in the majority of these converters. Cascaded converters and SEPIC‐based (Search ResultsWeb resultsSingle‐ended primary‐inductor converter) DC–DC converters are proposed to solve the problem in recent years. The input inductor reduces the input current ripple.…”

Section: Introductionmentioning

confidence: 99%

“…These are also discussed in Reference . In order to decrease the input current ripple, two methods have been presented: (a) cascading with a boost converter in the input and (b) using SEPIC converter instead of boost converter . However, using cascaded method decreases the efficiency.…”

Section: Introductionmentioning

confidence: 99%

A DC–DC boost converter with high voltage gain integrating three‐winding coupled inductor with low input current ripple

Moradpour

Tavakoli

2020

Int Trans Electr Energ Syst

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Summary In this paper, a new DC–DC converter with high voltage gain is proposed. One inductor, three capacitors, a three‐winding coupled inductor, three diodes and one power switch is employed in the presented structure. Because of connecting inductor, the input current of the presented converter is continuous with low ripple. The stored energy in the leakage inductor is recycled by a passive voltage clamp. The voltage clamp also reduces the voltage stress on the main power switch. Since the voltage stress of the switch is low, a switch with low on‐resistance (RDS(ON)) can be used in the proposed converter which reduces the conduction loss. High efficiency, low voltage stress, low input current ripple, low voltage stress on the power switch and zero current switching of the switch are the advantages of the proposed converter. The proposed converter is analyzed in steady state condition and the experimental results are presented to justify the feasibility of the proposed topology.

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“…However, the circuit uses many components and is complicated to significantly extend the voltage conversion ratio. By using a combination of double‐boost converter and single‐ended primary‐inductor converter (SEPIC), a higher voltage gain of about 11 is achieved in Babaei et al 14 Nonetheless, the converter uses 16 components and the lone switch is operated at a slightly higher duty ratio of D = 0.7.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐high gain DC‐DC converter based on interleaved quadratic boost converter with ripple‐free input current

Samuel

Keerthi

Prabhakar

2020

Int Trans Electr Energ Syst

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Background In this paper, an ultra‐high gain DC‐DC converter (UHGC) which provides a very high voltage conversion ratio value of 21.11 is described. Methods The proposed UHGC is synthesized from a two‐phase interleaved quadratic boost converter (IQBC). The voltage gain of the IQBC is further extended by using the voltage‐lift technique. To meet the standard DC voltage level of 380 V across the load terminals, the output of the voltage‐lifted IQBC is cascaded to a conventional boost converter (CBC). By operating the switches located in the IQBC stage with a duty ratio of 0.5 and 180° phase‐shift, the source current ripples are nullified. Besides drawing a smooth and ripple‐free current from the input, the converter's voltage gain is adjusted by varying the duty ratio of the switch employed in the CBC stage. Results The proposed gain extension concept is practically validated by conducting experiments on 18‐380 V, 150 W prototype converter. Under practical conditions, the proposed converter operates at full‐load efficiency of 94.7%. Moreover, due to the proposed gain enhancing technique, the two switches employed in the IQBC stage are subjected to low voltage stress levels which are 18.95% of the output voltage. By employing a simple closed‐loop control technique, the output voltage is regulated to remain constant at 380 V despite variations in line voltage and load current magnitudes. Conclusion The proposed UHGC possesses some advantageous features like (i) high voltage gain capability, (ii) ability to draw smooth and continuous (ripple‐free) current from the input, (iii) flexible structure which provides the required high voltage gain while drawing smooth current from the source and (iv) ability to quickly regulate the output voltage using simple closed‐loop control. Thus, the proposed UHGC is an appropriate choice for integrating the input PV source to a common DC bus or microgrid.

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High step‐up DC‐DC converter with reduced voltage stress on devices

Cited by 30 publications

References 30 publications

A New Multilevel Inverter Topology With Reduced Power Components for Domestic Solar PV Applications

A New Multilevel Inverter Topology With Reduced Power Components for Domestic Solar PV Applications

A DC–DC boost converter with high voltage gain integrating three‐winding coupled inductor with low input current ripple

Ultra‐high gain DC‐DC converter based on interleaved quadratic boost converter with ripple‐free input current

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