High Step-Up Three-Level Soft Switching DC-DC Converter for Photovoltaic Generation Systems
Abstract
:1. Introduction
2. Circuit Structure and Its Characteristics
3. Consideration of Operating Modes
4. Small Signal Modelling
5. Design Considerations
5.1. Design of Input Filter Inductors L1, L2
5.2. Design of Output Capacitors Co1, Co2
5.3. Design of Series Inductors L7, L8
5.4. Design of Inductors L3, L4
5.5. Design of Capacitors C1, C2
5.6. Design of Switches M1 and M2
5.7. Design of Output Diodes D3, D4
5.8. Design of Input Diodes D1, D2
5.9. Design of Resonant Elements C3, C4, L5, L6
6. Control of the Proposed DC-DC Converter
7. Simulation and Experimental Results
8. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Parameter | Value | Type | Number |
---|---|---|---|
Input Voltage | 48 V | -- | -- |
Output Voltage | 700 V | -- | -- |
Switching Frequency | 50 kHz | -- | -- |
Output Power | 250 W | -- | -- |
Inductors L1, L2, L3, L4 | 300 µH | -- | 4 |
Resonant Inductors L5, L6 | 20 µH | -- | 2 |
Series Inductors L7, L8 | 15 µH | -- | 2 |
Capacitors C1, C2 | 200 µF | Electrolytic | 2 |
Resonant Capacitors C3, C4 | 1 µF | Electrolytic | 2 |
Output Capacitors CO1, CO2 | 80 µF | Electrolytic | 2 |
Power Switches M1, M2 | -- | IRFP242 | 2 |
Output Diodes D3, D4 | -- | MUR840 | 2 |
Power Diodes D1, D2 | -- | BYV27-200 | 2 |
Ref. | Voltage Gain | Switch Voltage Stress | Diode Voltage Stress | Soft Switching | Efficiency | Switching Frequency | No. of Active Elements | |||
---|---|---|---|---|---|---|---|---|---|---|
S | D | L | C | |||||||
[18] | Yes | 94% | 100 kHz | 3 | 4 | 3 | 8 | |||
[14] | Load Dependent | Yes | 95.7% | 20 kHz | 4 | 7 | 1 | 4 | ||
[15] | No | 91.1% | 25 kHz | 2 | 4 | 2 | 2 | |||
[16] | No | 90.3% | 11.5 kHz | 4 | 8 | 2 | 4 | |||
[17] | -- | No | 98% | 50 kHz | 4 | 0 | 1 | 2 | ||
[22] | No | 94.14% | 20 kHz | 2 | 3 | 2 | 3 | |||
[23] | No | 90.53% | 20 kHz | 1 | 3 | 1 | 3 | |||
[24] | No | 95.66% | 10 kHz | 3 | 4 | 2 | 4 | |||
[25] | No | 93.1% | 20 kHz | 2 | 5 | 1 | 4 | |||
Proposed | Yes | 96.2% | 50 kHz | 2 | 4 | 8 | 6 |
Type of Loss | Formula | Proposed Converter |
---|---|---|
Switching Loss in Switches | (0.5 × 48 × 0.36 × (100 + 100) × 10−9 + 48 × (0.36 + 0.1) × 100 × 10−9) × 50 × 103 | |
Parasitic Capacitance Loss in Switches | 0.5 × 20 × 10−6 × 442 × 50 × 103 | |
Conduction Loss in Switches | 0.18 × (50 × 103 × 24.6 × 2 × 10−5)0.5 | |
Conduction Loss in the Input Diodes (D1 and D2) | 4.64 × 0.5 | |
Conduction Loss in the Output Diodes (D3 and D4) | 0.24 × 0.5 | |
The Loss of Inductors | 4.55 | |
The Loss of Capacitors | 0.75 | |
Total Losses | - | PLoss = 9.2 W |
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Taghavi, S.S.; Rezvanyvardom, M.; Mirzaei, A.; A. Gorji, S. High Step-Up Three-Level Soft Switching DC-DC Converter for Photovoltaic Generation Systems. Energies 2023, 16, 41. https://doi.org/10.3390/en16010041
Taghavi SS, Rezvanyvardom M, Mirzaei A, A. Gorji S. High Step-Up Three-Level Soft Switching DC-DC Converter for Photovoltaic Generation Systems. Energies. 2023; 16(1):41. https://doi.org/10.3390/en16010041
Chicago/Turabian StyleTaghavi, Seyed Shahriyar, Mahdi Rezvanyvardom, Amin Mirzaei, and Saman A. Gorji. 2023. "High Step-Up Three-Level Soft Switching DC-DC Converter for Photovoltaic Generation Systems" Energies 16, no. 1: 41. https://doi.org/10.3390/en16010041