A Remotely Central Dimming System for a Large-Scale LED Lighting Network Providing High Quality Voltage and Current

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

8 Scopus Citations
View graph of relations

Author(s)

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number8744412
Pages (from-to)5455-5465
Journal / PublicationIEEE Transactions on Industry Applications
Volume55
Issue number5
Online published23 Jun 2019
Publication statusPublished - Sep 2019

Abstract

Standard TRIAC-based dimmers introduce power quality issues especially for a large-scale lighting network. Other existing dimming protocols involve additional wiring systems and/or additional controllers to light emitting diode (LED) drivers. This paper proposes a central dimming system for a large penetration of LED lamps. The dimming system is remotely controlled through a webpage or a desktop application. Dimming is achieved while maintaining high voltage and current quality waveforms, which results in a high power factor and a low input current harmonic distortion. The system does not require additional wiring or specific adjustments to commercial dimmable LED drivers. The system allows scheduling a dimming profile to endorse energy saving. In the proposed dimming system, dimming function is achieved by connecting a voltage source converter (VSC) between the grid and the LED lamps. An advanced feature is added to the VSC dimmer to remotely send/receive messages between the system and the user through a graphical user interface. Thus, the user can communicate with the VSC dimmer by sending commands and receiving feedback information. The influence of communication delay on system stability is analyzed by using small signal models. A VSC dimmer prototype (500 VA/120 V) has been built with a communication module to provide remote control. Experimental results and comparisons between utilizing the TRIAC-based dimmer and the VSC dimmer for dimming function are discussed in the paper.

Research Area(s)

  • Dimmer, LED, power quality, remote dimming, TRIAC, VSC

Citation Format(s)

A Remotely Central Dimming System for a Large-Scale LED Lighting Network Providing High Quality Voltage and Current. / Abdalaal, Radwa Mohamed; Ho, Carl Ngai Man; Leung, Carson K.; Chung, Henry Shu-Hung.

In: IEEE Transactions on Industry Applications, Vol. 55, No. 5, 8744412, 09.2019, p. 5455-5465.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review