Abstract
Progress in the development of LED technologies has reached a state which justifies the replacement of lighting with traditional light sources, not only in new buildings but also in existing, older ones. One of such replacements was used as an example of a lighting flicker study presented in this paper. The results of initial measurements indicated that Rapid Voltage Changes (RVCs) are the cause of light flicker. The procedure was introduced and described in this paper to provide the necessary actions to mitigate the light flicker in LED lighting. In order to fulfil this task, the source of locally induced voltage fluctuations has to be identified. A method of identification was developed and a multi-function office printer was identified as the source of RVCs. Using a less sensitive LED driver, changing the connection point of the interfering device, and improving the electrical installation were considered as a set of possible solutions. Laboratory measurements have shown significant sensitivity of the LED driver to RVCs. The identified source of voltage disturbances was confirmed by a simulation of supply voltage variation in the presence of such device in Matlab Simulink with the use of digital flickermeter.
Highlights
The development of LED lighting technologies has reached the stage of maturity
While voltage fluctuations are limited by power quality Standards, Rapid Voltage Changes (RVCs) can be induced locally by devices that pass the IEC compatibility procedures [11], as is evident from the analysis presented in this paper
Faulty poorly designed drivers or RVCs were were considered as possible sourcessources of light flicker
Summary
The development of LED lighting technologies has reached the stage of maturity. The gap in luminous efficacy between LED and traditional light sources at the same or better lighting quality parameters justifies the replacement of traditional lighting on a large scale. Replacement of lighting installations usually takes place in older buildings, where important changes in the planned working process were established, and at least some kind of building adaptation was made. In such cases, the electrical installation is often left in its original condition, and rarely completely adapted to new conditions or changes in technologies of electrical devices in use. The electrical installation is often left in its original condition, and rarely completely adapted to new conditions or changes in technologies of electrical devices in use One of such configurations was used as an example of the lighting flicker study presented in this paper. After fluorescent lighting was replaced by an LED lighting installation in a part of the office building, complaints were noted about annoying light flicker in some offices
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
