DC bus voltage EMI mitigation in three-phase active rectifiers using a virtual neutral filter

Parker, S, Segaran, D, Holmes, G and McGrath, B 2014, 'DC bus voltage EMI mitigation in three-phase active rectifiers using a virtual neutral filter', in Proceedings of the 2014 IEEE International Power Electronics Conference (IPEC-Hiroshima 2014 ECCE-ASIA), Hiroshima, Japan, 18-21 May 2014, pp. 2372-2379.


Document type: Conference Paper
Collection: Conference Papers

Title DC bus voltage EMI mitigation in three-phase active rectifiers using a virtual neutral filter
Author(s) Parker, S
Segaran, D
Holmes, G
McGrath, B
Year 2014
Conference name IPEC-Hiroshima 2014 - ECCE-ASIA
Conference location Hiroshima, Japan
Conference dates 18-21 May 2014
Proceedings title Proceedings of the 2014 IEEE International Power Electronics Conference (IPEC-Hiroshima 2014 ECCE-ASIA)
Publisher IEEE
Place of publication United States
Start page 2372
End page 2379
Total pages 8
Abstract Grid connected PWM inverters/rectifiers inevitably produce a high frequency switched common mode voltage on their DC bus, which can cause substantial EMI problems. The mitigation strategy proposed in this paper is to couple the Y point of the LCL filter capacitors to the DC bus mid-point to connect a virtual neutral to the DC bus, which significantly reduces the high frequency common mode voltages on the bus. However, additional common mode inductances and capacitances are required for this filter, to limit high frequency circulating currents and define the EMI filter breakpoint. Also, the converter current regulator must be split into differential and common mode sections, to eliminate phase coupling between the phase leg active damping current regulators, and to support damping of the common mode EMI filter resonance. The concept is verified by simulations and experimental results.
Subjects Industrial Electronics
Power and Energy Systems Engineering (excl. Renewable Power)
Keyword(s) Active Rectifier
Common Mode
EMI
Virtual Neutral
DOI - identifier 10.1109/IPEC.2014.6869921
Copyright notice Copyright © 2014 IEEE
ISBN 9781479927067
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