The power supply No. 2 switch box of the Xinfengnan distribution station and the 55# and 71# box-type substation equipment rectification project on the Baoxi Line, undertaken by Shaanxi Yuanda Electric Power Engineering Co., Ltd. (Yuanda Electric), has been fully completed, passed commissioning and final acceptance, and the equipment is now in normal operation.The project was contracted by the Xi'an Power Supply Section of China Railway Xi'an Group Co., Ltd. and is a rectification project for existing railway distribution equipment, with the focus on restoring and improving the operating condition of the equipment rather than building new railways or new complete distribution stations.
Project positioning: systematic rectification of existing railway distribution equipment
The full name of this project is "Rectification of the Power Supply No. 2 Switch Box of the Xinfengnan Distribution Station and the 55# and 71# Box-Type Substation Equipment on the Baoxi Line." The employer is the Xi'an Power Supply Section of China Railway Xi'an Group Co., Ltd., and the contractor is Shaanxi Yuanda Electric Power Engineering Co., Ltd.Judging from the project name and construction scope, the project targets the switch boxes in the existing distribution station and the box-type substation equipment along the Baoxi Line, with construction centered on the disassembly, modification, repair, replacement, and commissioning of the equipment itself.After long-term operation of railway distribution equipment, conditions may change in areas such as cabinets, switch gas compartments, operating mechanisms, cabinet door interlocks, and secondary circuits, requiring targeted rectification to restore equipment function and operational reliability.This project was organized and implemented precisely to meet this need. Its construction content is clearly different from that of new construction projects, with emphasis on the inspection, repair, and rectification of existing equipment.
- Employer: Xi'an Power Supply Section of China Railway Xi'an Group Co., Ltd.
- Contractor: Shaanxi Yuanda Electric Power Engineering Co., Ltd.
- Targets for rectification: the No. 2 power switch box of the Xinfeng South Power Distribution Station, and the 55# and 71# box-type substations on the Baoxi Line
Scope of construction: comprehensive rectification of primary equipment and secondary circuits
According to the project content, the construction covers the disassembly and modification of railway box-type substation cabinets, SF6 switch gas chamber inflation rectification, operating mechanism repair, cabinet door and interlock switch replacement, secondary circuit rectification, as well as auxiliary operations such as equipment commissioning and on-site equipment handling.These processes involve both the inspection and restoration of primary equipment and the troubleshooting and rectification of secondary circuits. The processes are closely interconnected, placing high demands on on-site organization, work sequence, and coordination.The disassembly and modification of cabinets must be carried out without affecting the overall state of existing equipment. The SF6 switch gas chamber inflation rectification and operating mechanism repair are related to the reliability of switch operation, while the replacement of cabinet doors and interlock switches and the rectification of secondary circuits further improve the safety protection and signal control functions of the equipment.Although auxiliary operations such as on-site equipment handling do not directly constitute modifications to the equipment itself, they are likewise essential links for ensuring the smooth progress of construction.
- Disassembly and modification of box-type substation cabinets and repair of operating mechanisms
- SF6 switchgear gas chamber inflation rectification
- Replacement of cabinet doors and interlock switches, rectification of secondary circuits
- Equipment commissioning and auxiliary operations such as on-site equipment handling
Implementation results: commissioning passed and completion acceptance was finished
After the project was fully completed, the equipment passed commissioning, completion acceptance was finished, and it is now in normal operation.All stages from construction to acceptance were carried out in accordance with the relevant requirements for railway power supply equipment rectification, and the construction content covered the rectification scope stipulated in the contract.The normal operation of the equipment indicates that the rectified switch boxes and box-type substation equipment are ready to be put into operation, and the project has achieved the expected rectification goals.For Yuanda Electric, this project demonstrates the company's engineering execution capability in the maintenance and rectification of railway power distribution equipment, and has also accumulated on-site organization and commissioning experience for subsequent similar existing equipment rectification projects.
- All construction content completed
- Commissioning passed, completion acceptance finished
- Equipment put into normal operation
Follow-up arrangements
Yuanda Electric will continue to focus on the needs of railway power distribution equipment rectification and operation and maintenance, ensure the quality of equipment commissioning through standardized construction organization and commissioning processes, and provide support for the safe and stable operation of railway power supply.