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. 2023 Jan 6;13(1):264.
doi: 10.1038/s41598-022-26660-7.

A new extended single-switch high gain DC-DC boost converter for renewable energy applications

Arafa S Mansour  1 , Mohamed S Zaky  2
Affiliations

A new extended single-switch high gain DC-DC boost converter for renewable energy applications

Arafa S Mansour et al. Sci Rep. .

Abstract

High-gain DC/DC converters are considered one of the most important components of green energy systems. Large numbers of these converters are used for increasing the voltage gain by using an extreme duty cycle. However, it increases losses and the cost, degrades the system performance, and hence obtains a low efficiency. In this article, a new design of a high-gain DC/DC boost converter is proposed. This converter has the potential to be used in low input voltage applications that need a high voltage gain such as systems powered by solar photovoltaic panels and fuel cells. The new topology is characterized by its simplicity of operation, high voltage gain, better efficiency, continuity of the input current, reduced number of inductors and capacitors, and can be extended to get higher gains. The converter structure, principle of operation, and design consideration of inductors and capacitors are presented in detail. Derivation of power losses and efficiency is presented. A laboratory prototype is implemented, and various experimental tests are given. The achievement of the suggested design is confirmed and compared with other recent high-gain converters.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
The multi-cells proposed DC-DC boost converter.
Figure 2
Figure 2
The two cells proposed DC-DC boost converter.
Figure 3
Figure 3
Operating modes of proposed converter.
Figure 4
Figure 4
Equivalent circuit of Mode 1: (a) active and inactive elements, and (b) equivalent electrical circuit.
Figure 5
Figure 5
Equivalent circuit of Mode 2: (a) active and inactive elements, and (b) equivalent electrical circuit.
Figure 6
Figure 6
Voltage gain of the proposed boost converter at different number of cells (n = 1, 2 and 3) and the conventional one.
Figure 7
Figure 7
Equivalent model for the proposed circuit with parasitic elements.
Figure 8
Figure 8
The experimental setup system.
Figure 9
Figure 9
The schematic drawing for the test system.
Figure 10
Figure 10
Experimental waveforms of (a) gate-emitter voltage, (b) input and output voltage, (c) input current, (d) capacitor C1 voltage, and (e) capacitor C2 voltage.
Figure 11
Figure 11
Experimental waveforms of (a) inductor L1 voltage and current, (b) inductor L2 voltage and current, and (c) SW voltage.
Figure 12
Figure 12
Experimental waveforms of (a) diode D1 voltage, (b) diode D2 voltage, (c) diode D3 voltage, and (d) diode Do voltage.
Figure 13
Figure 13
Voltage gain versus duty cycle: derived and experimentally.
Figure 14
Figure 14
Converter efficiency versus output power at different values of the input voltage and D = 0.4.
Figure 15
Figure 15
(a) Power loss distribution, and (b) the efficiency pie chart at a duty cycle of 40%, Vin = 24 V and Po= 52 W for converter components.
Figure 16
Figure 16
A schematic diagram of closed loop control circuit.
Figure 17
Figure 17
Output voltage with changing the reference voltage (Vref) at Vin = 24 V.
Figure 18
Figure 18
Output voltage response with changing the input voltage (Vin) at Vref = 140 V.
Figure 19
Figure 19
Output voltage response with changing the load value at Vref = 115 V.
Figure 20
Figure 20
Voltage gain versus duty cycle.
Figure 21
Figure 21
Normalized switch voltage stress with voltage gain variation.
Figure 22
Figure 22
Normalized output diode voltage stress with voltage gain variation.
See this image and copyright information in PMC

References

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