A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop
This paper investigates the problem of fluctuation of the neutral-point potential (NPP) in a three-level NPC inverter with a capacitor-voltage loop. The phase pulse width duty cycle disturbance PWM method is proposed to suppress the NPP fluctuation efficiently. Based on the basic carrier-based Phase...
| Main Authors: | , , , , , |
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| Format: | Article |
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IEEE
2017
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| Online Access: | https://eprints.nottingham.ac.uk/39381/ |
| _version_ | 1848795824418455552 |
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| author | Zhang, Yun Li, Jing Li, Xinmin Cao, Yanfei Sumner, Mark Xia, Changliang |
| author_facet | Zhang, Yun Li, Jing Li, Xinmin Cao, Yanfei Sumner, Mark Xia, Changliang |
| author_sort | Zhang, Yun |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This paper investigates the problem of fluctuation of the neutral-point potential (NPP) in a three-level NPC inverter with a capacitor-voltage loop. The phase pulse width duty cycle disturbance PWM method is proposed to suppress the NPP fluctuation efficiently. Based on the basic carrier-based Phase Disposition (PD) PWM method, the average pulse neutral-point current model is established. Then the frequency, amplitude and equivalent initial phase of the NPP fluctuation are analyzed based on the current model. According to the alternating error of the DC-link capacitor voltages, a capacitor-voltage loop with a quasi PR (proportional resonant) controller is presented. The control variable, which varies with the modulation index, phase current, load power factor, etc, can be obtained from the quasi PR controller. Finally, an experimental three-level NPC inverter is described and the validity and feasibility of the proposed method are verified by experimental results. |
| first_indexed | 2025-11-14T19:38:13Z |
| format | Article |
| id | nottingham-39381 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:38:13Z |
| publishDate | 2017 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-393812020-05-04T18:23:19Z https://eprints.nottingham.ac.uk/39381/ A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop Zhang, Yun Li, Jing Li, Xinmin Cao, Yanfei Sumner, Mark Xia, Changliang This paper investigates the problem of fluctuation of the neutral-point potential (NPP) in a three-level NPC inverter with a capacitor-voltage loop. The phase pulse width duty cycle disturbance PWM method is proposed to suppress the NPP fluctuation efficiently. Based on the basic carrier-based Phase Disposition (PD) PWM method, the average pulse neutral-point current model is established. Then the frequency, amplitude and equivalent initial phase of the NPP fluctuation are analyzed based on the current model. According to the alternating error of the DC-link capacitor voltages, a capacitor-voltage loop with a quasi PR (proportional resonant) controller is presented. The control variable, which varies with the modulation index, phase current, load power factor, etc, can be obtained from the quasi PR controller. Finally, an experimental three-level NPC inverter is described and the validity and feasibility of the proposed method are verified by experimental results. IEEE 2017-01-01 Article PeerReviewed Zhang, Yun, Li, Jing, Li, Xinmin, Cao, Yanfei, Sumner, Mark and Xia, Changliang (2017) A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop. IEEE Transactions on Power Electronics, 32 (1). pp. 825-836. ISSN 0885-8993 Three-level NPC inverter neutral-point potential capacitor-voltage loop fluctuation-suppression. http://ieeexplore.ieee.org/document/7422833/ doi:10.1109/TPEL.2016.2536176 doi:10.1109/TPEL.2016.2536176 |
| spellingShingle | Three-level NPC inverter neutral-point potential capacitor-voltage loop fluctuation-suppression. Zhang, Yun Li, Jing Li, Xinmin Cao, Yanfei Sumner, Mark Xia, Changliang A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop |
| title | A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop |
| title_full | A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop |
| title_fullStr | A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop |
| title_full_unstemmed | A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop |
| title_short | A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop |
| title_sort | method for the suppression of fluctuations in the neutral-point potential of a three-level npc inverter with a capacitor-voltage loop |
| topic | Three-level NPC inverter neutral-point potential capacitor-voltage loop fluctuation-suppression. |
| url | https://eprints.nottingham.ac.uk/39381/ https://eprints.nottingham.ac.uk/39381/ https://eprints.nottingham.ac.uk/39381/ |