The effect of signal measurement and processing delay on the compensation of harmonics by PWM converters

Author

Le Roux, Wiehan ; Van Wyk, Jacobus Daniel

Author_Institution

Ind. Electron. Technol. Res. Group, Rand Afrikaans Univ., Johannesburg, South Africa

Volume

47

Issue

2

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

297

Lastpage

304

Abstract

The effect of the delay time on the reference signal for compensation due to the data acquisition and digital signal processing is examined. The time delay will cause incorrect compensation and unwanted remaining nonactive power after compensation. A theoretical evaluation is done on the negative effect on compensation due to a single frequency distortion. This evaluation is expanded to handle multiple harmonic distortion to calculate the total theoretical ineffectivity of compensation for a specific load due to a specific time delay. This provides a method of calculating the ineffectivity caused by any delay in compensation, whatever the cause. Finally, the theoretical evaluations are validated by means of experimental results

Keywords

PWM power convertors; compensation; delays; harmonic distortion; harmonics suppression; power conversion harmonics; signal processing; PWM power converters; delay time; harmonics compensation; multiple harmonic distortion; processing delay; reactive power; signal measurement; single frequency distortion; specific load; Delay effects; Digital signal processing; Jacobian matrices; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Sampling methods; Signal processing; Signal sampling; Voltage;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.836345

Filename

836345