Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability
Abstract Grid‐connected inverters with an inductor–capacitor–inductor (LCL) filter usually require the implementation of damping in the filter to suppress the resonance associated with the filter and hence ensure internal stability. The value for the damping resistor is commonly chosen as one‐third...
Main Authors: | , , , |
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Format: | Article |
Language: | English |
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Wiley
2024-03-01
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Series: | IET Power Electronics |
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Online Access: | https://doi.org/10.1049/pel2.12666 |
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author | Ramy Ali Hamed Heydari‐doostabad Shahab Sajedi Terence O'Donnell |
author_facet | Ramy Ali Hamed Heydari‐doostabad Shahab Sajedi Terence O'Donnell |
author_sort | Ramy Ali |
collection | DOAJ |
description | Abstract Grid‐connected inverters with an inductor–capacitor–inductor (LCL) filter usually require the implementation of damping in the filter to suppress the resonance associated with the filter and hence ensure internal stability. The value for the damping resistor is commonly chosen as one‐third of the capacitive reactance at the resonance frequency of the LCL filter. However, this commonly‐used principle does not take into account the external stability of the inverter, i.e. the potential for an interaction between the inverter output impedance and the grid impedance. This work discusses a new design for the damping resistor to assure the external stability of the voltage source inverter as well as its internal stability. The analysis shows that the proposed design can ensure the external stability of the voltage source inverter with different grid impedances as well as robustness against the variations of the filter parameters while maintaining low power losses and an acceptable attenuation rate for high‐frequency harmonics. To validate the theoretical analysis, a 1 kW, 110 V laboratory prototype is implemented. The obtained results confirm the applicability of the proposed design approach. |
first_indexed | 2024-04-25T00:39:49Z |
format | Article |
id | doaj.art-96e1b58d86cd44e3956a277be817a905 |
institution | Directory Open Access Journal |
issn | 1755-4535 1755-4543 |
language | English |
last_indexed | 2024-04-25T00:39:49Z |
publishDate | 2024-03-01 |
publisher | Wiley |
record_format | Article |
series | IET Power Electronics |
spelling | doaj.art-96e1b58d86cd44e3956a277be817a9052024-03-12T11:30:28ZengWileyIET Power Electronics1755-45351755-45432024-03-0117451152310.1049/pel2.12666Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stabilityRamy Ali0Hamed Heydari‐doostabad1Shahab Sajedi2Terence O'Donnell3School of Electrical and Electronic Engineering University College Dublin Dublin IrelandSchool of Electrical and Electronic Engineering University College Dublin Dublin IrelandSchool of Electrical and Electronic Engineering University College Dublin Dublin IrelandSchool of Electrical and Electronic Engineering University College Dublin Dublin IrelandAbstract Grid‐connected inverters with an inductor–capacitor–inductor (LCL) filter usually require the implementation of damping in the filter to suppress the resonance associated with the filter and hence ensure internal stability. The value for the damping resistor is commonly chosen as one‐third of the capacitive reactance at the resonance frequency of the LCL filter. However, this commonly‐used principle does not take into account the external stability of the inverter, i.e. the potential for an interaction between the inverter output impedance and the grid impedance. This work discusses a new design for the damping resistor to assure the external stability of the voltage source inverter as well as its internal stability. The analysis shows that the proposed design can ensure the external stability of the voltage source inverter with different grid impedances as well as robustness against the variations of the filter parameters while maintaining low power losses and an acceptable attenuation rate for high‐frequency harmonics. To validate the theoretical analysis, a 1 kW, 110 V laboratory prototype is implemented. The obtained results confirm the applicability of the proposed design approach.https://doi.org/10.1049/pel2.12666frequency‐domain analysisharmonicspower convertorsresonancevoltage‐source convertors |
spellingShingle | Ramy Ali Hamed Heydari‐doostabad Shahab Sajedi Terence O'Donnell Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability IET Power Electronics frequency‐domain analysis harmonics power convertors resonance voltage‐source convertors |
title | Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability |
title_full | Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability |
title_fullStr | Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability |
title_full_unstemmed | Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability |
title_short | Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability |
title_sort | improved design of passive damping for single phase grid connected lcl filtered inverter considering impedance stability |
topic | frequency‐domain analysis harmonics power convertors resonance voltage‐source convertors |
url | https://doi.org/10.1049/pel2.12666 |
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