Emerging smart grid technologies aim to renovate
traditional power grid by integrating intelligent devices and their
communications for monitoring and automation of the power grid
to enable efficient demand-side energy management. In this paper,
energy management in smart dc building grid powered dc electrical
appliances like lighting is investigated, in particular energy
savings from proposed personal lighting management strategy.
Unlike conventional fluorescent lamps powered mainly by ac grid,
LED luminaires are dc in nature, thus results in significant power
conversion losses, if operate on traditional ac powered system,
are analyzed with proposed dc distribution building grid for LED
lighting. This paper continues to explore the use of smart wireless
sensors for personal control of the dc grid powered networked
LED lighting. Experimental results show that the proposed smart
LED lighting system with an energy saving mechanism incorporated
is able to achieve similar lighting performance as the
conventional lighting condition, while at the same time, able to
attain about 44% energy saving as compared to the original ac
fluorescent system. For a low voltage dc grid being implemented,
the maximum power loss and voltage drop of the developed dc
distribution building grid are 2.25% and 3% respectively.