Analysis and design of a new active power filter to cancel neutral current harmonics in three phase four wire electric distribution systems

Author

Enjeti, P. ; Shireen, W. ; Packebush, P. ; Pitel, I.

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

fYear

1993

fDate

2-8 Oct 1993

Firstpage

939

Abstract

An active power filter for cancelling harmonic currents in the neutral of a three-phase four-wire system is proposed. This approach employs a star/delta transformer along with a two-switch PWM (pulse-width-modulated) controlled active filter. The closed-loop control of the active power filter guarantees cancellation of neutral current harmonics under varying load conditions. The proposed system greatly improves the overall system performance and virtually eliminates transformer overheating due to harmonics. Experimental results from a prototype active power filter confirm the suitability of the proposed approach

Keywords

active filters; closed loop systems; distribution networks; load (electric); power system control; power system harmonics; power transformers; pulse width modulation; PWM; active power filter; cancellation; closed-loop control; design; load; network analysis; neutral current harmonics; overheating; performance; star/delta transformer; three phase four wire electric distribution systems; Active filters; Circuit faults; Conductors; Electronic ballasts; Harmonic analysis; Phase transformers; Power harmonic filters; Power system harmonics; Wire; Wiring;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-1462-X

Type

conf

DOI

10.1109/IAS.1993.299011

Filename

299011