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Abstract
This paper presents a midpoint voltage balancer (MVB) which provides neutral point voltage stabilization to three-phase four-wire converters. The MVB consists of dual switching legs, two neutral inductors, and two split capacitors. A sensorless approach with open-loop control is adopted. It removes current/voltage sensors and alleviates computational demand. It is a cost effective and robust alternative to the closed-loop MVB. Due to the zero-crossing of the neutral inductor current, all switches of the MVB operates in zero-voltage switching mode when neutral current is smaller than the nominal phase current of the three-phase four-wire converter. Interleaving operation of the MVB minimizes the high-frequency current circulation in the split capacitors. In addition, the two neutral inductors are magnetically coupled to decrease the inductor current ripple. As a result, the size of passive components of the MVB is reduced. The proposed sensorless approach is verified by a 20 kVA prototype.
Original language | English |
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Title of host publication | 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe) |
Publisher | Institute of Electrical and Electronics Engineers |
Number of pages | 10 |
ISBN (Electronic) | 978-9-0758-1536-8 |
DOIs | |
Publication status | Published - Sep 2020 |
Event | 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe - https://epe-ecce-conferences.com/epe2020/, Lyon, France Duration: 7 Sep 2020 → 11 Sep 2020 https://epe-ecce-conferences.com/epe2020 |
Conference
Conference | 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe |
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Abbreviated title | EPE'20 ECCE Europe |
Country/Territory | France |
City | Lyon |
Period | 7/09/20 → 11/09/20 |
Internet address |
Keywords
- Converter circuit
- Interleaved converters
- Midpoint voltage balancer
- Sensorless control
- Three-phase system
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Dive into the research topics of 'Sensorless Neutral Point Voltage Stabilization in Three-Phase Four-Wire Converters'. Together they form a unique fingerprint.Projects
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HiPERFORM
Duarte, J. L., Lomonova, E. A., Thirion, W. P. F., van der Hagen, D., Xu, X. & Tibola, G.
1/05/18 → 30/10/21
Project: Research direct