A reduced-rating hybrid filter to suppress neutral current harmonics in three-phase four-wire systems

This letter proposes a reduced-rating hybrid filter to suppress neutral current harmonics in three-phase four-wire systems. Under unbalanced loading, the proposed filter eliminates only harmonics in the neutral current while it does not affect the fundamental. The VA rating of the inverter is signif...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2004-08, Vol.51 (4), p.927-930
Main Authors: Sewan Choi, Jang, M.
Format: Article
Language:English
Subjects:
Active filters
Circuits
Conductors
Harmonics
Impedance
Industrial electronics
Inverters
Magnetic separation
Neutral currents
Power harmonic filters
Power system harmonics
Pulse width modulation inverters
Ratings
Switches
Uninterruptible power systems
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Description
Summary:This letter proposes a reduced-rating hybrid filter to suppress neutral current harmonics in three-phase four-wire systems. Under unbalanced loading, the proposed filter eliminates only harmonics in the neutral current while it does not affect the fundamental. The VA rating of the inverter is significantly reduced compared to the conventional one since only fundamental current due to unbalanced loading could flow through the inverter switch.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2004.831765