城市轨道交通消防供电时间完整性研究

Study on the Time Integrity of Fire Fighting Power Supply in Urban Rail Transit

在全国城市轨道交通快速发展,各地消防供电设计存在差异的现状下,提供一个完整的城市轨道交通消防供电设计基准方案作为参考。城市轨道交通的消防配电完整链路是从低压开关柜起始,经敷设的电缆输送电能至消防设备。针对电源、线路、消防负荷3个要素,通过对大量规范、标准及文献的研究,深入分析各专业用电设备在火灾时的持续供电时间需求,规范对消防线路的设计要求,确定消防配电线路需要达到的不同持续供电时间。在此基础上,结合国内耐火电缆的分级及试验标准现状,进行合理的电缆选型、敷设方式选择,得到一个满足规范且合理的消防供电设计基准方案。为存在差异的各地轨道交通消防供电设计提供基准参考,对保障其消防配电可靠性及合理性具有重要的参考和指导意义。

Given the rapid development of urban rail transit across the country and the differences in fire power supply design among different regions,a complete urban rail transit fire fighting power supply design benchmark scheme is provided as a reference.The complete fire fighting power distribution chain of urban rail transit stations starts from the low-voltage switchgear,and through the laid cables,electrical energy is transmitted to the fire fighting equipment.Focusing on the three elements of power supply,circuit,and fire load,through the study of a large number of specifications,standards,and literature,the continuous power supply time requirements of various professional electrical equipment in case of fire is deeply analyzed,the design requirements for fire protection lines are standardized and the different continuous power supply times that fire protection distribution lines need to achieve are determined.On this basis,combined with the current classification and testing standards of domestic fire-resistant cables,reasonable cable selection and laying method selection are carried out to obtain a standardized and reasonable fire fighting power supply design benchmark scheme.Benchmark reference is provided for the design of fire fighting power supply for a variety of rail transit in different regions,it has important reference and guiding significance for ensuring the reliability and rationality of fire power distribution.