研究目的
Analyzing and interpreting the effects of LEDs on the grid by conducting power quality measurements of 4 different commercial LED luminaires.
研究成果
The study concluded that while LED luminaires have acceptable power factor values when fully on, dimming leads to decreased power factor and increased current harmonics beyond standard limits. All luminaires met flicker boundaries. The findings suggest that the effects of dimmable LED equipment on power quality warrant further detailed analysis, especially considering their increasing use in the lighting industry.
研究不足
The study focused on a limited number of LED luminaires (4 different types). The effects of dimmable equipment on power quality were highlighted as an area requiring more detailed analysis.
1：Experimental Design and Method Selection:
Power quality measurements of 4 different commercial LED luminaires were conducted using a FLUKE 435-II quality analyzer. The measurements included voltage, current, power, power factor changes, harmonic values, and flicker levels recorded at 3 s intervals.
2：Sample Selection and Data Sources:
Four different commercially available LED indoor lighting luminaires were selected for the study. Photometric and electrical measurements were carried out in Yildiz Technical University Lighting Laboratory.
3：List of Experimental Equipment and Materials:
FLUKE 435-II quality analyzer, goniophotometer, Ulbricht sphere for photometric measurements.
4：Experimental Procedures and Operational Workflow:
The luminaires were tested without seasoning. Photometric measurements were initiated after the luminaires became stable. The temperature and humidity of the laboratory were maintained at 25 ± 1 °C and 65%, respectively.
5：Data Analysis Methods:
The results were examined in a comparative manner and interpreted in the light of standards, focusing on power factor, harmonic and flicker measurements.
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