李炳华（CCDI集团，北京市 100013）

Discussion on Issues Concerning DC Power Supply and Distribution System of Civil Building

LI Binghua（CCDI Group，Beijing 100013，China）

    Abstract：In accordance with the status quo of electrical load and the development process of power supply，it is proposed that the DC power supply and distribution system in the civil building may only be used as the supplement to the AC power supply and distribution system，which shall be adopted in the certain local system，local area and particular situation. The standard DC voltage is preferred and it is suggested that in the DC supply and distribution system of civil building，there shall be no more than two classes of high voltage and no more than three classes of low voltage. The DC system shall be adopted for the civil building pursuant to the load characteristics and conditions of distributed energy sources and the DC - AC hybrid system is a practical option in the current.

    Key words：civil building；DC；AC；load characteristics；voltage classes；distributed energy sources；system structure；reliability

  摘 要：根据用电负荷现状和电源的发展情况，提出民用建筑中直流供配电系统只能作为交流供配电系统的补充，在某些局部系统、局部区域、特定条件下应用直流供配电系统。优先采用标准的直流电压，建议民用建筑中压直流供配电系统的电压等级不多于两级，低压直流配电系统不多于三级。民用建筑中直流系统结构应根据负荷特性、分布式能源情况合理采用直流系统，交直流混合系统是当前的务实应用。

  关键词：民用建筑；直流；交流；负荷特性；电压等级；分布式能源；系统结构；可靠性

     中图分类号：TU852                文献标识码：A

     doi：10. 3969 / j. issn. 1003 - 8493. 2019. 07. 001