马   越 潘   妍（中铁第六勘察设计院集团有限公司，天津市 300308）

Comparison and Selection of the Medium‑voltage Power Supply Scheme for a Large Industrial Building

MA Yue PAN Yan（China Railway Liuyuan Group Co.,Ltd.,Tianjin 300308，China）

Abstract：Large industrial buildings usually have a large floor area and power consumption,which exceed the power supply capacity of a single municipal 10 kV circuit. For such projects,one municipal 35 kV incoming line or multiple 10 kV circuits may be used as power supply. The 35 kV incoming line can supply power to the end equipments through secondary step‑down or primary step‑down. The advantages and disadvantages of the secondary step‑down scheme for 35 kV incoming line,the primary step‑down scheme for 35 kV incoming line,and the scheme for multiple 10 kV circuits are compared from technical and economic perspectives, in order to provide the optimal medium‑voltage power supply scheme for large industrial buildings.

Key words：large industrial building; secondary step‑down;primary step‑down;10 / 0.4 kV substation;35 / 0.4 kV substation;technical and economic comparison;multi‑circuit power supply;35 kV switchyard

摘　要：大型工业建筑的建筑面积和用电量都很大，超出单路市政10 kV回路供电容量，此类项目考虑市政35 kV进线供电或多路10 kV回路供电。35 kV进线可采用二级降压或者一级降压给末端设备供电。从技术和经济两方面比较35 kV进线二级降压、35 kV进线一级降压供电方案和多路10 kV回路供电方案的优缺点，为大型工业建筑工程提出最优中压供电方案。

关键词：大型工业建筑；二级降压；一级降压；10 / 0.4 kV变电所；35 / 0.4 kV变电所；技术经济比较；多回路供电；35 kV开关站

中图分类号：TU852                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.02.004