A fully digital hysteresis current controller for an active power filter

Title

A fully digital hysteresis current controller for an active power filter

Subject

active filtering

power electronics

field programmable gate array

hysteresis current control

Creator

David M. E. Ingram

Simon D. Round

Source

International Journal of Electronics. Vol. 86, No. 10, pp. 1217-1232

Publisher

Taylor and Francis

Date

1999-10

Relation

ISSN 0020-7217, 1362-3060

Format

application/pdf

Language

en

Type

Peer-reviewed Article

info:eu-repo/semantics/article

info:eu-repo/semantics/acceptedVersion

Identifier

10.1080/002072199132761

Abstract

An active power filter is used to eliminate current harmonics produced by nonlinear loads. This paper discusses a fully digital method of controlling a power inverter used to inject the active filter compensating currents into the power system. A digital signal processor performs the harmonic isolation and generates a digital reference current. A hysteresis current controller has been implemented in a field programmable gate array that generates the inverter switching signals using this reference. This reduces the analogue circuitry and enhances the system’s immunity to electromagnetic interference. The performance of a small-scale inverter under completely digital control is presented and discussed.