Title :
A new three-phase harmonic-free rectification scheme based on zero-sequence current injection
Author :
Choi, Se-Wan ; Won, Chung-Yeun ; Kim, Gyu-Sik
Author_Institution :
Dept. of Control & Instrum. Eng., Seoul Nat. Univ., South Korea
Abstract :
This paper proposes a new three-phase harmonic-free rectification scheme based on a zero-sequence injection technique. The proposed scheme incorporates two half-bridge inverters and two single-phase transformers to actively and individually shape the positive and negative DC rail currents of the rectifier. The shaped zero-sequence harmonic currents are then circulated through the AC side of the rectifier via a zigzag transformer, resulting in pure sinusoidal input currents in the three-phase diode rectifier. A design example along with component ratings calculation is detailed. Experimental results on a 1.5 kVA prototype are provided to validate the proposed technique.
Keywords :
bridge circuits; invertors; rectification; rectifying circuits; transformers; 1.5 kVA; 220 V; component ratings calculation; half-bridge inverters; negative DC rail currents; positive DC rail currents; pure sinusoidal input currents; rectifier; shaped zero-sequence harmonic currents; single-phase transformers; three-phase diode rectifier; three-phase harmonic-free rectification scheme; zero-sequence current injection; zigzag transformer; Costs; Diodes; Load flow; Phase transformers; Power harmonic filters; Power system harmonics; Pulse width modulation inverters; Rails; Rectifiers; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE
Conference_Location :
Miami Beach, FL, USA
Print_ISBN :
0-7803-7768-0
DOI :
10.1109/APEC.2003.1179209