Abstract：This study focuses on the selection of high-voltage power distribution facilities for electric heavy-duty truck charging stations. Taking a charging station in Guizhou Province as a case study, it analyzes the configuration of cables and transformers to balance operational safety and life-cycle economic benefits. The results indicate that, considering both safety and economic efficiency, ZC-YJV22-8.7/10 kV high-voltage cables are recommended for heavy-duty truck charging stations, with their cross-section determined by three verifications: ampacity, voltage drop, and thermal stability. Given the characteristics of large load fluctuations and prominent peak demands, parallel operation of multiple transformers can improve load adaptability; dividing economic operation intervals and shutting down some transformers can effectively reduce no-load losses. In the typical 800 kV∙A+2 000 kV∙A configuration, deactivating the smaller transformer during peak periods reduces costs by up to 12.39% by eliminating losses associated with no-load operation. Multi-scheme comparisons show that capacity splitting should meet the constraints of parallel operation, and the configuration of “large-capacity main transformer+remaining capacity to make up” yields superior life-cycle economic performance. The selection principles and economic operation strategies proposed in this study can provide references for the design of high-voltage power distribution systems in heavy-duty truck charging stations, and are of great significance for improving the operational economy and power supply stability of such stations.
袁贵涛, 宁霞. 重卡充电站高压侧电缆-变压器配套选型研究[J]. 电气技术, 2026, 27(7): 24-30.
YUAN Guitao, NING Xia. Research on matching selection of high-voltage side cables and transformers for heavy-duty truck charging stations. Electrical Engineering, 2026, 27(7): 24-30.
2026, Vol. 27 
