A method for reducing harmonics in output voltages of a double-connected inverter

Author

Masukawa, Shigeo ; Iida, Shoji

Author_Institution

Dept. of Electr. Eng., Tokyo Denki Univ., Japan

Volume

9

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

543

Lastpage

550

Abstract

A new method for reducing the harmonics involved in the output voltages of a double-connected inverter is proposed. By adding four auxiliary switching devices and an interphase transformer with a secondary winding to the conventional 12-step inverter, output voltages of the proposed circuit can produce almost the same waveforms as a conventional 36-step inverter. In this paper, circuit performances and output voltage waveforms are discussed, and optimum parameters are derived. The effects on harmonic reductions are then clarified by theoretical and experimental results, and the ratings of system components are investigated

Keywords

invertors; power system harmonics; power transformers; pulse width modulation; switching circuits; transformer windings; 12-step inverter; auxiliary switching devices; circuit performance; double-connected inverter; harmonics; interphase transformer; optimum parameters; output voltages; ratings; secondary winding; voltage source invertors; waveforms; Bridge circuits; Pulse width modulation; Pulse width modulation inverters; Static VAr compensators; Switching circuits; Thyristors; Topology; Uninterruptible power systems; Velocity control; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.321039

Filename

321039