A Novel Method of Load Compensation Under Unbalanced and Distorted Voltages

Author

Mishra, Mahesh K. ; Ghosh, Arindam ; Joshi, Avinash ; Suryawanshi, Hiralal M.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai

Volume

22

Issue

1

fYear

2007

Firstpage

288

Lastpage

295

Abstract

In this paper, load compensation techniques under unbalanced and distorted voltages have been discussed. Two kinds of compensation methods are considered. In the first category, synchronous detection and modified equal current strategies are used under the unbalanced but sinusoidal source voltages. In the second method, load compensation based on instantaneous symmetrical component theory with positive sequence extraction is proposed and is shown to work under unbalanced and the non-sinusoidal source voltages. To support the proposed method, a 440 V (L-L) three-phase, four-wire distribution system is considered. The compensator is realized using a three-phase voltage source inverter (VSI) operated in the current control mode. Detailed digital simulation and experimental results are presented to validate the approach

Keywords

compensation; distribution networks; invertors; load (electric); 400 V; current control mode; distorted voltage; instantaneous symmetrical component theory; load compensation; modified equal current strategy; nonsinusoidal source voltages; positive sequence extraction; synchronous detection; three-phase four-wire distribution system; three-phase voltage source inverter; unbalanced voltage; Current control; Digital simulation; Fourier transforms; Inverters; Load management; Low pass filters; Nonlinear distortion; Phase detection; Reactive power; Voltage; Load compensation; unbalanced and distorted voltages; voltage source inverter;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2006.881579

Filename

4039453