ประเภท: Transportation | Kehua By Sangchai

Urban rail traffic station contains multiple weak current equipment systems, such as communication, signal, integrated supervision, environmental monitoring, office automation, access control, automatic fare collection, automatic fire alarm, shield gate, emergency lighting, integrated automation of transformer substation, etc. These systems shoulder the responsibility of environmental monitoring of passenger transport, information transfer, passenger guidance, and others, which are the critical first-order load, High-reliable power supply system is required to guarantee the quality and continuity of power supply.

Because the rail traffic grows apace, energy conservation attracts more attentions. Data show that the electricity consumption of rail traffic accounts for 40 percent of the overall operating cost of the subway, and train traction power supply system accounts for 50% of the total energy consumption of the rail traffic system.

PSCADA is provided with layered and distributed system structure in distributed arrangement and centralized management

The functions of the center and stations can be realized by this software and the functions of PSCADA subsystem can be realized by the close integration of line, software and the platform. Through this, layered, distributed, remote and real-time monitoring and control on operating conditions of electrical equipment including main power supply units for transformer substations, overhead line system (contact rail), etc. can be completed, and various abnormal accidents and alarm events of power supply system can be dealt with. Meanwhile, power supply system schedule, automaticity of management and maintenance, and power supply quality will be greatly improved to ensure safe and reliable system operation.

Monitoring objects include incoming power line, load switch, feeder line, transformer switch, DC breaker, low-voltage circuit breaker, traction rectifier unit, electric drainage cabinet (including stray current monitoring device), distribution transformer, AC/DC screen, rail potential limiter, braking energy consumption device, and other equipment. Application fields include subways, light rails and electrified railways.

For the BAS in subways, electromechanical equipment including air conditioning ventilation system, water supply and drainage, lighting, elevator, escalator, guiding sign, etc. in the subway station and running tunnel are fully managed and controlled in operation by the distributed computer supervision and control system. During the fire or train jam, running mode against disasters will be rapidly and timely on. According to fire information sent by the fire alarm system or block information sent by the automatic train control system, air supply and exhaust will be automatically adjusted for ventilation and smoke discharge and personnel evacuation

For the systematic design of rail transit line under construction, electric system, electromechanical equipment, fire alarm, shield gate, passenger broadcast, passenger information, CCTV, tickets of selling and checking and other subsystems and devices will be deeply integrated and controlled by the ISCS (Integrated Supervision Control System) to provide operators on duty with integrative operating functions and improve the safety, efficiency, and reliability of operation and management Through ISCS in the sites to be monitored, such as the center and stations, monitoring contents by division of power and means and tools to control all subsystems and devices will be provided for operators at all levels.