Analysis and Control of a Single-Phase-Inverter–Zigzag-Transformer Hybrid Neutral-Current Suppressor in Three-Phase Four-Wire Systems
Sewan Choi
Minsoo Jang
Seoul Nat. Univ. of Technol., Seoul;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug. 2007
Volume: 54,
Issue: 4
On page(s): 2201-2208
ISSN: 0278-0046
INSPEC Accession Number: 9608224
Digital Object Identifier: 10.1109/TIE.2007.899831
Current Version Published: 2007-07-23
Abstract
This paper presents analysis and control of a hybrid filter that can suppress neutral harmonic currents in three-phase four-wire systems not only with harmonic voltage-source loads but also with harmonic current-source loads. The filter voltampere rating is significantly reduced compared to the conventional neutral-current-suppressing methods. The rectifier part of the neutral harmonic suppressor has been removed by controlling the dc capacitor voltage. The experimental results on a 50-kVA prototype validate the proposed control approach.
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