在建的香港大屿山机场铁路与典型的集运系统相比有一些独具的特点,有如:牵引功率极大的列车;由于车站/隧道的经营性用电多,早、晚高峰期长,和牵引变电站间隔远等原因电力需求量极高;1500V的直流架空线系统设计供列车以135公里的时速运行;还有站台屏蔽门等。本文简要地介绍了这些特点及对供电设计的影响。 There are some unique features of the LHD flight under construction in Hong Kong compared with the typical shipping system, such as trains with very high traction power; long service hours due to stations / tunnels, long and short peak periods and traction Substation distance and other reasons, the power demand is extremely high; 1500V DC overhead line system designed for the train to run at 135 kilometers per hour; there are platform screen doors and so on. This article briefly describes these features and their impact on power supply design.