Research and Application of Key Technologies of Smart Energy for Rail Transit DC Lighting Microgrid

This paper takes Suzhou Rail Transit Line 5 as an example to illustrate the research and application of smart energy in rail transit DC lighting microgrid. Suzhou rail transit Line 5 is the first line to use DC lighting systems for all stations in China, and it is the first in the world’s rail transit construction. DC lighting breaks the way that AC directly distributes power to LED lamps, which greatly increases the overall life of LED lamps and improves the safety of electricity use. The ground station introduces a photovoltaic new energy microgrid DC lighting system to realize the stable operation of the system under the access of new energy.