Analisys on the feasibility to modulate lighting systems load: the case study of Palermo

The feasibility to shift and/or modulating the loads that characterize buildings can be useful to improve the performance of smart grids. As known, it is not possible to shift in the time the operating time of the lighting system, but it is possible to modulate the needed electric power. In this paper, the first set of data and a preliminary analysis conducted in the Solarlab of the University of Palermo are presented. The innovative lighting system was designed, sized and installed with the aim of evaluating the consumption of an island user that can be controlled by the DSO or an aggregator. In order to do this, the lighting system load was modulated by applying different strategies: varying the Correlated Colour Temperature (CCT), varying the luminous flux, and applying a daylight-linked control system (DLCs). The measurements were taken and also provided useful data to evaluate the real performance of the lighting system and the DLCs. Furthermore, the study focused the attention on the visual comfort parameters. First measurements analysis shows that the strategies applied are useful to modulate the absorbed power and, consequently to be managed and controlled by an aggregator. A variation of absorbed power of the 30% can be achieved by varying the CCT from 3000K to 6000K.