Content
Abstract:
Light emitting diode (LED) luminaires are widely used in street, road, and tunnel illumination. It is necessary to detect their negative effects on power grid, especially in terms of power quality distortions. In addition, because of the limited energy sources, they have to be operated in most efficient way. This paper proposed an adaptive illumination system that can be used in highway tunnels. In this context, an experimental system that consist of LED luminaires with various power values that are possible to be used in tunnel illumination was implemented. Scenarios have been created for the designed system in accordance with possible tunnel illumination scheme. Siemens S7–1200 PLC was used to control these scenarios. FFT analysis of the measurements obtained with adaptive illumination scenarios was performed and power quality distortions were determined for different harmonic levels. Similar analysis was repeated for the non-adaptive system, and a detailed comparison was proposed. In addition, both systems were compared in terms of energy consumption. Operational characteristics of adaptive illumination systems were discussed by using the obtained data. Results show that total harmonic distortion (THD) for all luminaires are active situation is quite lower than adaptive illumination scenarios, where the values of current THD are 149.7 %, 119.9 %, and 85.8 % that scenario 1, scenario 2, and all luminaires are in active situation, respectively. On the other hand, as advantage, a power saving of 73.4 % and 60.3 % can be achieved compared to different adaptive illumination scenarios according to all luminaires are active.
References:
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