Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value
The main drawback of the Cascaded-H Bridge converter based on three-phase/single-phase current-source inverters is the large DC inductors needed to limit the variation of the DC current caused by the single-phase inverter oscillating power. If the oscillating power is somehow compensated, then the D...
| Main Authors: | , , , |
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| 格式: | Article |
| 語言: | English |
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MDPI AG
2022-01-01
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| 叢編: | Energies |
| 主題: | |
| 在線閱讀: | https://www.mdpi.com/1996-1073/15/1/324 |
| _version_ | 1827668469885173760 |
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| author | Pedro E. Melín Carlos R. Baier Eduardo E. Espinosa José R. Espinoza |
| author_facet | Pedro E. Melín Carlos R. Baier Eduardo E. Espinosa José R. Espinoza |
| author_sort | Pedro E. Melín |
| collection | DOAJ |
| description | The main drawback of the Cascaded-H Bridge converter based on three-phase/single-phase current-source inverters is the large DC inductors needed to limit the variation of the DC current caused by the single-phase inverter oscillating power. If the oscillating power is somehow compensated, then the DC inductor can be designed just as a function of the semiconductors’ switching frequency, reducing its value. This work explores the use of three-phase/single-phase cells magnetically coupled through their DC links to compensate for the oscillating power among them and, therefore, reduce the DC inductor value. At the same time, front ends controlled by a non-linear control strategy equalize the DC currents among coupled cells to avoid saturating the magnetic core. The effectiveness of the proposal is demonstrated using mathematical analysis and corroborated by computational simulation for a 110 kVA load per phase and experimental tests in a 2 kVA laboratory prototype. The outcomes show that for the tested cases, coupling the DC links by a 1:1 ratio transformer allows reducing the DC inductor value below 20% of the original DC inductor required. The above leads to reducing by 50% the amount of magnetic energy required in the DC link compared to the original topology without oscillating power compensation, keeping the quality of the cell input currents and the load voltage. |
| first_indexed | 2024-03-10T03:42:17Z |
| format | Article |
| id | doaj.art-34e9789340a941e6a59f3ef39b51a371 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T03:42:17Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-34e9789340a941e6a59f3ef39b51a3712023-11-23T11:28:56ZengMDPI AGEnergies1996-10732022-01-0115132410.3390/en15010324Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors ValuePedro E. Melín0Carlos R. Baier1Eduardo E. Espinosa2José R. Espinoza3Department of Electrical and Electronic Engineering, Universidad del Bío-Bío, Concepción 4051381, ChileDepartment of Electrical Engineering, Universidad de Talca, Curicó 3340000, ChileDepartment of Electrical Engineering, Faculty of Engineering, Universidad Católica de la Santísima Concepción, Concepción 4090541, ChileDepartment of Electrical Engineering, Universidad de Concepción, Concepción 4070386, ChileThe main drawback of the Cascaded-H Bridge converter based on three-phase/single-phase current-source inverters is the large DC inductors needed to limit the variation of the DC current caused by the single-phase inverter oscillating power. If the oscillating power is somehow compensated, then the DC inductor can be designed just as a function of the semiconductors’ switching frequency, reducing its value. This work explores the use of three-phase/single-phase cells magnetically coupled through their DC links to compensate for the oscillating power among them and, therefore, reduce the DC inductor value. At the same time, front ends controlled by a non-linear control strategy equalize the DC currents among coupled cells to avoid saturating the magnetic core. The effectiveness of the proposal is demonstrated using mathematical analysis and corroborated by computational simulation for a 110 kVA load per phase and experimental tests in a 2 kVA laboratory prototype. The outcomes show that for the tested cases, coupling the DC links by a 1:1 ratio transformer allows reducing the DC inductor value below 20% of the original DC inductor required. The above leads to reducing by 50% the amount of magnetic energy required in the DC link compared to the original topology without oscillating power compensation, keeping the quality of the cell input currents and the load voltage.https://www.mdpi.com/1996-1073/15/1/324cascaded H-Bridgecurrent-source inverternon-linear controloscillating power compensation |
| spellingShingle | Pedro E. Melín Carlos R. Baier Eduardo E. Espinosa José R. Espinoza Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value Energies cascaded H-Bridge current-source inverter non-linear control oscillating power compensation |
| title | Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value |
| title_full | Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value |
| title_fullStr | Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value |
| title_full_unstemmed | Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value |
| title_short | Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value |
| title_sort | cascaded h bridge converter based on current source inverter with dc links magnetically coupled to reduce the dc inductors value |
| topic | cascaded H-Bridge current-source inverter non-linear control oscillating power compensation |
| url | https://www.mdpi.com/1996-1073/15/1/324 |
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