Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection
The cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) has a limited negative-sequence current injection capability compared to a conventional CHB StatCom, due to the comparatively larger oscillations on the capacitor voltages. Placing limits on the ability to provide negative-s...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/172735 |
| _version_ | 1824453988686233600 |
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| author | Ramos, Ezequiel Rodriguez Leyva, Ramon Farivar, Glen G. Townsend, Christopher D. Pou, Josep |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Ramos, Ezequiel Rodriguez Leyva, Ramon Farivar, Glen G. Townsend, Christopher D. Pou, Josep |
| author_sort | Ramos, Ezequiel Rodriguez |
| collection | NTU |
| description | The cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) has a limited negative-sequence current injection capability compared to a conventional CHB StatCom, due to the comparatively larger oscillations on the capacitor voltages. Placing limits on the ability to provide negative-sequence current to the grid for a given capacitor size is required to prevent overmodulation. This article shows that these limits can be maximized by injecting an optimal third-harmonic circulating current. The effects of injecting the third-harmonic current on the capacitor voltages, both in balanced and unbalanced grid voltage conditions, are analyzed. Specifically, the procedure allows the knowledge of the potential capability of the LC-StatCom when injecting negative-sequence currents. The procedure is based on a linear programming approach. Although the procedure is applicable to any CHB StatCom, regardless of the submodule capacitor size, it is particularly important in LC-StatComs. To corroborate the proposed analysis, simulation and experimental results under balanced and unbalanced grid voltage conditions are presented. |
| first_indexed | 2025-02-19T03:15:10Z |
| format | Journal Article |
| id | ntu-10356/172735 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:15:10Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1727352023-12-18T06:44:05Z Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection Ramos, Ezequiel Rodriguez Leyva, Ramon Farivar, Glen G. Townsend, Christopher D. Pou, Josep School of Electrical and Electronic Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Electrical and electronic engineering Circulating Current Injection Multilevel Converter The cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) has a limited negative-sequence current injection capability compared to a conventional CHB StatCom, due to the comparatively larger oscillations on the capacitor voltages. Placing limits on the ability to provide negative-sequence current to the grid for a given capacitor size is required to prevent overmodulation. This article shows that these limits can be maximized by injecting an optimal third-harmonic circulating current. The effects of injecting the third-harmonic current on the capacitor voltages, both in balanced and unbalanced grid voltage conditions, are analyzed. Specifically, the procedure allows the knowledge of the potential capability of the LC-StatCom when injecting negative-sequence currents. The procedure is based on a linear programming approach. Although the procedure is applicable to any CHB StatCom, regardless of the submodule capacitor size, it is particularly important in LC-StatComs. To corroborate the proposed analysis, simulation and experimental results under balanced and unbalanced grid voltage conditions are presented. This work was supported by the Office of Naval Research U.S. under DUNS Code: 595886219. 2023-12-18T06:44:05Z 2023-12-18T06:44:05Z 2023 Journal Article Ramos, E. R., Leyva, R., Farivar, G. G., Townsend, C. D. & Pou, J. (2023). Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection. IEEE Transactions On Power Electronics, 38(4), 4544-4558. https://dx.doi.org/10.1109/TPEL.2022.3233033 0885-8993 https://hdl.handle.net/10356/172735 10.1109/TPEL.2022.3233033 2-s2.0-85146226890 4 38 4544 4558 en IEEE Transactions on Power Electronics © 2022 IEEE. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Circulating Current Injection Multilevel Converter Ramos, Ezequiel Rodriguez Leyva, Ramon Farivar, Glen G. Townsend, Christopher D. Pou, Josep Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection |
| title | Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection |
| title_full | Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection |
| title_fullStr | Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection |
| title_full_unstemmed | Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection |
| title_short | Negative-sequence current capability in low-capacitance cascaded H-bridge static compensators with optimal third-harmonic circulating current injection |
| title_sort | negative sequence current capability in low capacitance cascaded h bridge static compensators with optimal third harmonic circulating current injection |
| topic | Engineering::Electrical and electronic engineering Circulating Current Injection Multilevel Converter |
| url | https://hdl.handle.net/10356/172735 |
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