Source voltage sensorless estimation scheme for PWM rectifiers under unbalanced conditions

被引：53

作者：

Song, HS ^{[1
]}

Joo, IW

Nam, K

机构：

[1] Pohang Univ Sci & Technol, Div Elect & Comp Engn, Pohang 790784, South Korea

[2] Elect & Telecommun Res Inst, Taejon 305350, South Korea

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2003年 / 50卷 / 06期

关键词：

sensorless pulsewidth-modulation (PWM) rectifier; state estimator;

D O I：

10.1109/TIE.2003.819685

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A source voltage sensorless estimation scheme is proposed for a pulsewidth-modulation (PWM) rectifier in unbalanced circumstances. The negative sequence is accompanied by the unbalance among phases, and acts as an ac disturbance to a normal-mode estimator and controller. Hence, without considering voltage unbalance, a PWM rectifier yields a voltage ripple in the dc-link voltage and large reactive currents. With the proposed sensorless scheme, both positive and negative components are estimated separately by using a full- (or reduced-) order estimator. The feasibility of the proposed sensorless scheme is confirmed through computer simulation and experiment.

引用

页码：1238 / 1245

页数：8

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