Lighting Control and Its Power Management in Railway Passenger Station

Lighting control in a large railway passenger station is one important topic to be addressed, considering that the energy expenses are substantial and solutions to optimize the use of energy are required. This paper presents an integrated solution for lighting control and its power management using distributed computer control system and configuration control software. The system adopts hierarchical distributed structure, in which the bottom unit is PLC which collects real-time data and turns lamps on or off, and industrial control computer is the central unit which acts human-computer interface to display important information and manage the whole control system. These two units are linked by RS485 bus which accomplishes two-way data transmission. Additionally, a software application is designed so all bottom units could be controlled and monitored remotely and the power status could be monitored and analyzed.