A novel active line conditioner for a three-phase system

Author

Bhavaraju, V.B. ; Enjeti, P.

Author_Institution

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

fYear

1993

fDate

2-8 Oct 1993

Firstpage

979

Abstract

A novel configuration for an active line conditioner is proposed for correcting voltage unbalances in a three-phase AC power system. The proposed system injects a correction voltage V_inj with proper magnitude and phase in one phase to guarantee balanced voltages at the load terminals. The negative voltage components in the input supply are effectively nullified by the injected voltage. The kVA requirement of the proposed active line conditioner is small, typically 3% for a 10% unbalance in the input supply. The dynamic cancellation of the negative sequence voltage component by the proposed scheme drastically improves the performance of induction-motor-type loads connected to a weak AC system. A thorough analysis of the scheme along with suitable design guides is presented. Selected experimental results on a laboratory prototype active line conditioner are detailed

Keywords

invertors; load (electric); power system control; voltage control; active line conditioner; correction voltage; design; dynamic cancellation; induction motors; invertors; load terminals; loads; negative sequence voltage component; performance; three-phase AC power system; voltage control; Active filters; Couplings; Electrical capacitance tomography; Induction motors; Laboratories; Power electronics; Power system analysis computing; Prototypes; Variable speed drives; Voltage control;

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.1993.299017

Filename

299017