Title :
Analysis and Control of a Single-Phase-Inverter–Zigzag-Transformer Hybrid Neutral-Current Suppressor in Three-Phase Four-Wire Systems
Author :
Choi, Sewan ; Jang, Minsoo
Author_Institution :
Seoul Nat. Univ. of Technol., Seoul
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.
Keywords :
invertors; power capacitors; power harmonic filters; power transformers; rectifying circuits; voltage control; apparent power 50 kVA; harmonic current-source loads; harmonic voltage-source loads; hybrid filter; neutral harmonic currents; single-phase-inverter-zigzag-transformer hybrid neutral-current suppressor; three-phase four-wire systems; Conductors; Control system analysis; Control systems; Harmonic analysis; Impedance; Power harmonic filters; Power system harmonics; Pulse width modulation inverters; Rectifiers; Voltage control; Active filter; neutral current; three-phase four-wire; zero-sequence; zigzag transformer;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2007.899831
