Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters
This paper introduces magnetic integrated high-order trap–trap–inductor (<i>TTL</i>) and inductor–trap–trap (<i>LTT</i>) filters featuring two <i>LC</i>-traps designed for grid-tied inverters, aimed at reducing the size of output-power multi-trap filters. The prop...
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| Format: | Article |
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2025-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/2/423 |
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| author | Maged Al-Barashi Aicheng Zou Yongjun Wang Wei Luo Nan Shao Zeyu Tang Bing Lu |
| author_facet | Maged Al-Barashi Aicheng Zou Yongjun Wang Wei Luo Nan Shao Zeyu Tang Bing Lu |
| author_sort | Maged Al-Barashi |
| collection | DOAJ |
| description | This paper introduces magnetic integrated high-order trap–trap–inductor (<i>TTL</i>) and inductor–trap–trap (<i>LTT</i>) filters featuring two <i>LC</i>-traps designed for grid-tied inverters, aimed at reducing the size of output-power multi-trap filters. The proposed filters exhibit excellent harmonic absorption capabilities alongside a compact design. Building on the conventional integrated inductor–capacitor–inductor (<i>LCL</i>) filter, the approach involves connecting a small capacitor in parallel with either the inverter-side or grid-side inductors to create an <i>LC</i> trap. Additionally, a second <i>LC</i> trap can be achieved by integrating the filter capacitor in series with the equivalent trap inductance, established by the magnetic coupling between the grid-side inductor and inverter-side one. This paper thoroughly analyzes the characteristics of the proposed filters. Moreover, a design method is presented to further minimize the size of the output filter components. Finally, validation through simulations and hardware-in-the-loop (HIL) experiments confirms the proposed approach’s effectiveness and feasibility. The integrated designs achieve a size reduction of 35.4% in comparison with the discrete windings. Moreover, these designed filters comply with IEEE standards, maintaining a grid-side current total harmonic distortion (THD) of less than 0.9%, with all current harmonics below 0.3% of the fundamental current. |
| format | Article |
| id | doaj-art-ac5a08ce332140e18db532200cdfc16b |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-ac5a08ce332140e18db532200cdfc16b2025-01-24T13:31:26ZengMDPI AGEnergies1996-10732025-01-0118242310.3390/en18020423Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics ConvertersMaged Al-Barashi0Aicheng Zou1Yongjun Wang2Wei Luo3Nan Shao4Zeyu Tang5Bing Lu6School of Aeronautics and Astronautics, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Aeronautics and Astronautics, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Aeronautics and Astronautics, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Aeronautics and Astronautics, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Aeronautics and Astronautics, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Aeronautics and Astronautics, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Electrical Engineering, Southwest Jiaotong University, Chengdu 611700, ChinaThis paper introduces magnetic integrated high-order trap–trap–inductor (<i>TTL</i>) and inductor–trap–trap (<i>LTT</i>) filters featuring two <i>LC</i>-traps designed for grid-tied inverters, aimed at reducing the size of output-power multi-trap filters. The proposed filters exhibit excellent harmonic absorption capabilities alongside a compact design. Building on the conventional integrated inductor–capacitor–inductor (<i>LCL</i>) filter, the approach involves connecting a small capacitor in parallel with either the inverter-side or grid-side inductors to create an <i>LC</i> trap. Additionally, a second <i>LC</i> trap can be achieved by integrating the filter capacitor in series with the equivalent trap inductance, established by the magnetic coupling between the grid-side inductor and inverter-side one. This paper thoroughly analyzes the characteristics of the proposed filters. Moreover, a design method is presented to further minimize the size of the output filter components. Finally, validation through simulations and hardware-in-the-loop (HIL) experiments confirms the proposed approach’s effectiveness and feasibility. The integrated designs achieve a size reduction of 35.4% in comparison with the discrete windings. Moreover, these designed filters comply with IEEE standards, maintaining a grid-side current total harmonic distortion (THD) of less than 0.9%, with all current harmonics below 0.3% of the fundamental current.https://www.mdpi.com/1996-1073/18/2/423harmonic distortion<i>LC</i>-trap passive filtersmagnetic integrationmulti-trap filtersswitching harmonics |
| spellingShingle | Maged Al-Barashi Aicheng Zou Yongjun Wang Wei Luo Nan Shao Zeyu Tang Bing Lu Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters Energies harmonic distortion <i>LC</i>-trap passive filters magnetic integration multi-trap filters switching harmonics |
| title | Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters |
| title_full | Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters |
| title_fullStr | Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters |
| title_full_unstemmed | Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters |
| title_short | Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters |
| title_sort | magnetic integrated multi trap filters using mutual inductance to mitigate current harmonics in grid connected power electronics converters |
| topic | harmonic distortion <i>LC</i>-trap passive filters magnetic integration multi-trap filters switching harmonics |
| url | https://www.mdpi.com/1996-1073/18/2/423 |
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