A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source Converters
<inline-formula><tex-math notation="LaTeX">$AC$</tex-math></inline-formula> power filters play an important role in limiting the high-frequency current harmonics injected by grid-tied voltage source converters (VSCs). Amongst the various types of filters, <inline...
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2024-01-01
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| author | Srinivas Gulur Vishnu Mahadeva Iyer Subhashish Bhattacharya |
| author_facet | Srinivas Gulur Vishnu Mahadeva Iyer Subhashish Bhattacharya |
| author_sort | Srinivas Gulur |
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| description | <inline-formula><tex-math notation="LaTeX">$AC$</tex-math></inline-formula> power filters play an important role in limiting the high-frequency current harmonics injected by grid-tied voltage source converters (VSCs). Amongst the various types of filters, <inline-formula><tex-math notation="LaTeX">$LCL$</tex-math></inline-formula> filters with integrated <inline-formula><tex-math notation="LaTeX">$LC$</tex-math></inline-formula> traps have become popular due to their ability to achieve a size reduction of the grid side inductor while demonstrating a similar current harmonic mitigation performance as a traditional <inline-formula><tex-math notation="LaTeX">$LCL$</tex-math></inline-formula> filter. In this article, a passively damped filter network with a partially rated <inline-formula><tex-math notation="LaTeX">$LC$</tex-math></inline-formula> trap (also referred to as the <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter) is proposed and delineated. The proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter provides a <inline-formula><tex-math notation="LaTeX">$-60\;\text{dB/dec}$</tex-math></inline-formula> roll-off characteristics at frequencies greater than switching frequency. Additionally, it is also demonstrated that this proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter has smaller voltage ratings for two of its shunt-connected capacitor components due to the specific placement of the damping resistor. A systematic analysis of the proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter is elucidated to design and select the component parameters. Steady-state and transient experimental results captured from a grid-tied 2-Level, 3<inline-formula><tex-math notation="LaTeX">$\phi$</tex-math></inline-formula> VSC prototype are provided to validate the grid current harmonic filtering capability, reduced voltage ratings of the two shunt capacitors and passive damping performance of the proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter. The proposed approach can achieve 19% and 36% filter shunt branch volume reduction for low voltage (208 V, 60 Hz) and medium voltage (4.16 kV, 60 Hz) grid-tied inverter systems, respectively, compared to state-of-the-art <inline-formula><tex-math notation="LaTeX">$LCL$</tex-math></inline-formula> filters with integrated <inline-formula><tex-math notation="LaTeX">$LC$</tex-math></inline-formula> traps. |
| format | Article |
| id | doaj-art-0176e5846aae41ee9f76786d12b438b3 |
| institution | DOAJ |
| issn | 2644-1314 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
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| series | IEEE Open Journal of Power Electronics |
| spelling | doaj-art-0176e5846aae41ee9f76786d12b438b32025-08-20T03:21:30ZengIEEEIEEE Open Journal of Power Electronics2644-13142024-01-01585286310.1109/OJPEL.2024.340827210545602A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source ConvertersSrinivas Gulur0https://orcid.org/0000-0002-1315-5322Vishnu Mahadeva Iyer1https://orcid.org/0000-0002-8820-0896Subhashish Bhattacharya2https://orcid.org/0000-0001-9311-5744Archer Aviation, San Jose, CA, USADepartment of Electrical Engineering, Indian Institute of Science, Bangalore, IndiaDepartment of Electrical and Computer Engineering, NC State University, Raleigh, USA<inline-formula><tex-math notation="LaTeX">$AC$</tex-math></inline-formula> power filters play an important role in limiting the high-frequency current harmonics injected by grid-tied voltage source converters (VSCs). Amongst the various types of filters, <inline-formula><tex-math notation="LaTeX">$LCL$</tex-math></inline-formula> filters with integrated <inline-formula><tex-math notation="LaTeX">$LC$</tex-math></inline-formula> traps have become popular due to their ability to achieve a size reduction of the grid side inductor while demonstrating a similar current harmonic mitigation performance as a traditional <inline-formula><tex-math notation="LaTeX">$LCL$</tex-math></inline-formula> filter. In this article, a passively damped filter network with a partially rated <inline-formula><tex-math notation="LaTeX">$LC$</tex-math></inline-formula> trap (also referred to as the <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter) is proposed and delineated. The proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter provides a <inline-formula><tex-math notation="LaTeX">$-60\;\text{dB/dec}$</tex-math></inline-formula> roll-off characteristics at frequencies greater than switching frequency. Additionally, it is also demonstrated that this proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter has smaller voltage ratings for two of its shunt-connected capacitor components due to the specific placement of the damping resistor. A systematic analysis of the proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter is elucidated to design and select the component parameters. Steady-state and transient experimental results captured from a grid-tied 2-Level, 3<inline-formula><tex-math notation="LaTeX">$\phi$</tex-math></inline-formula> VSC prototype are provided to validate the grid current harmonic filtering capability, reduced voltage ratings of the two shunt capacitors and passive damping performance of the proposed <inline-formula><tex-math notation="LaTeX">$L\text{-}PT\text{-}L$</tex-math></inline-formula> filter. The proposed approach can achieve 19% and 36% filter shunt branch volume reduction for low voltage (208 V, 60 Hz) and medium voltage (4.16 kV, 60 Hz) grid-tied inverter systems, respectively, compared to state-of-the-art <inline-formula><tex-math notation="LaTeX">$LCL$</tex-math></inline-formula> filters with integrated <inline-formula><tex-math notation="LaTeX">$LC$</tex-math></inline-formula> traps.https://ieeexplore.ieee.org/document/10545602/Differential mode (DM) filter<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">${LCL}$</tex-math> </inline-formula> </named-content> filter<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$L\text{-}C\text{-}TL$</tex-math> </inline-formula> </named-content> filter<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LC$</tex-math> </inline-formula> </named-content> trap filter<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LLCL$</tex-math> </inline-formula> </named-content> filter<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LT\text{-}C\text{-}L$</tex-math> </inline-formula> </named-content> filter |
| spellingShingle | Srinivas Gulur Vishnu Mahadeva Iyer Subhashish Bhattacharya A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source Converters IEEE Open Journal of Power Electronics Differential mode (DM) filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">${LCL}$</tex-math> </inline-formula> </named-content> filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$L\text{-}C\text{-}TL$</tex-math> </inline-formula> </named-content> filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LC$</tex-math> </inline-formula> </named-content> trap filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LLCL$</tex-math> </inline-formula> </named-content> filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LT\text{-}C\text{-}L$</tex-math> </inline-formula> </named-content> filter |
| title | A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source Converters |
| title_full | A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source Converters |
| title_fullStr | A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source Converters |
| title_full_unstemmed | A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source Converters |
| title_short | A Partially Rated LC Trap Type AC Filter for Grid-Tied Voltage Source Converters |
| title_sort | partially rated lc trap type ac filter for grid tied voltage source converters |
| topic | Differential mode (DM) filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">${LCL}$</tex-math> </inline-formula> </named-content> filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$L\text{-}C\text{-}TL$</tex-math> </inline-formula> </named-content> filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LC$</tex-math> </inline-formula> </named-content> trap filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LLCL$</tex-math> </inline-formula> </named-content> filter <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX">$LT\text{-}C\text{-}L$</tex-math> </inline-formula> </named-content> filter |
| url | https://ieeexplore.ieee.org/document/10545602/ |
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