A novel digital hysteresis current controller for an active power filter

Title

A novel digital hysteresis current controller for an active power filter

Subject

Inverters

Active filters

Control systems

Digital control

Digital signal processors

Field programmable analog arrays

Hysteresis

Power harmonic filters

Power system harmonics

Signal generators

Creator

David M. E. Ingram

Simon D. Round

Source

Proceedings of Second International Conference on Power Electronics and Drive Systems. Vol. 2, pp. 744-749 vol.2

Publisher

IEEE

Date

1997-05-26

Relation

ISBN 0-7803-3773-5

Format

application/pdf

Language

en

Type

Peer-reviewed Article

info:eu-repo/semantics/conferencePaper

info:eu-repo/semantics/acceptedVersion

Identifier

10.1109/PEDS.1997.627463

Coverage

Singapore

Abstract

An active power filter is used to eliminate current harmonics produced by nonlinear loads. This paper discusses a novel method of controlling a power inverter used to inject 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 and generates the switching signals from this reference. This reduces the analogue circuitry and enhances the system's immunity to noise. This paper presents the results and discusses the performance of a small scale inverter under completely digital control.