直流柔性照明在建筑中的应用研究

Application of Flexible Lighting for Direct Current (DC) Powered Buildings

普及柔性直流建筑是实现碳中和的潜在方法与途径。为探索直流建筑中柔性照明对建筑节能的影响,针对直流照明柔性调节的可行性、输入电压及用电负荷与室内照度的关系、直流照明的柔性区间、直流柔性调节所能带来的“削峰”与节能效果进行了研究。深圳市某办公建筑开敞办公区域内的实际照明情况及我国现行照明标准被用来制定实验方案。一套集“光储直柔”于一体的全直流可调电压实验台被用以完成相关实验。分析实验结果发现:(1)电压调节是一种可行的用以调节室内照度的方法;(2)文中所采用的直流照明设备的柔性电压范围为25.5~36.0 V,对应的室内照度柔性范围为300.0~608.0 lx;(3)通过柔性控制可在用电峰值时段里为电网减少66.59%照明用电负荷;(4)对于某办公建筑在其每天运行8.5 h的情况下,通过柔性控制可节约39.16%的照明用能。研究成果可被视为实现建筑“光储直柔”过程中对直流电器“柔性控制的可行性”及其“柔性特征”的初步探索,并为后续相关研究积累经验。

The utilization of flexible direct current(DC) buildings is a potential approach to achieve carbon neutrality. In order to investigate the impact of flexible lighting on energy saving in direct current powered buildings, the feasibility of flexible adjustment of direct current lighting equipment in buildings, the relationship between input voltage/electrical load and indoor illuminance, the flexible level of direct current lighting, and the “peak-shaving” and energy-saving effects brought by flexible direct current lighting are studied. In further detail, an experimental plan was proposed based on the lighting conditions of an open working area(of an office building located in Pingshan District, Shenzhen, Guangdong, China) and current Chinese lighting standards. On the other hand, a fully direct current container building that integrates “Photovoltaic, Storage, Direct-current, and Flexibility(PSDF)” with voltage adjustment function had been built as a test bench for conducing the direct current lighting flexibility experiments. According to the experimental results, it has been found that:(1)voltage adjustment is a feasible solution to adjust indoor illuminance;(2) the flexible voltage range of the DC lighting equipment used in this study is 25.5~36.0 V, and the corresponding indoor illuminance flexibility range is 300.0~608.0 lx;(3) through flexible control, 66.59% of power load used for lighting can be reduced during the peak period;(4) in the case of an office building running eight and half hours of lighting equipment a day, flexible control can save 39.16% of lighting energy consumption. The results can be regarded as a preliminary exploration of the “feasibility of flexible control” and “flexibility characteristics” of DC electrical appliances in the process of realizing SEDF of buildings, and accumulate relevant experience for subsequent related research.