地铁地下车站集中冷站供配电设计探讨

Discussion on Design of Power Supply and Distribution for Centralized Cold Station in Underground Subway Stations

通常情况下地铁地下车站空调制冷系统的冷水机组、配套的辅机以及位于风亭的冷却塔等设备按三级负荷配电。冷水机组由降压变电所三级负荷母线提供一路电源,辅机由环控电控室三级母线配电,当只有一路电源失电或变压器故障时必须切除。根据地铁供配电相关规范,结合实际地铁工程设计,讨论地铁车站内的集中冷站在不同工况下供配电方案,以充分提高设备的运行效率。

Water chillers and auxiliary equipment of subway station, cooling towers in air pavilion and other air conditioning equipment are normally provided with third order load power supply. Water chillers are provided with power by third order load bus bar in step down transformer substation, auxiliaries are provided with power by bus bar of third order load of motor control center system, they must be shut down when power supply fail or in case of transformer fault. According to Code for Metro Design with the actual designs of subway projects, the author discusses different conditions of power supply and distribution options of centralized cold station in subway stations in order to maximize equipment efficiency.