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Analysis and Control of a Single-Phase-Inverter–Zigzag-Transformer Hybrid Neutral-Current Suppressor in Three-Phase Four-Wire Systems

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2 Author(s)
Sewan Choi ; Seoul Nat. Univ. of Technol., Seoul ; Minsoo Jang

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.

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:54 ,  Issue: 4 )

Date of Publication:

Aug. 2007

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