摘要详情

ID / 提交时间

127 / 2024-04-14 12:49:30

标题

Research on Lightweighting of Secondary Cables in Instrumentation Room of Segmented Isolation Cabinet

关键字

Intelligent miniaturization, sectional isolation cabinet, lightweighting of secondary cables

主题及专题

6)Digital design technologies (CAE) in switchgears

状态

全文被拒

作者

Jing Zhao / Xiamen University of Technology

Xu Wang / Xiamen University of Technology

Dongyun Dai / Xiamen University of Technology

Yimin You / Xiamen University of Technology；Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control;School of Electrical Engineering and Automation

Ning Cai / Xiamen University of Technology

Di Tu / Xiamen University of Technology

摘要

Abstract: With the popularization and application of smart switchgear, the number of Intelligent Electronic Devices (IEDs) installed on the back of the door in switchgear instrumentation room has been increasing, meanwhile, the miniaturization of equipment makes the width of switchgear cabinets narrower and the volume of instrumentation room smaller, which leads to the complexity of the secondary cable routes both inside/outside the instrumentation room, the difficulty of troubleshooting, the problem of poorly opening and closing of the instrumentation door and etc.

This paper takes the secondary electrical schematic diagram of 650mm intelligent miniaturized longitudinal rotary/removable sectional isolation cabinet instrument room indoor/outdoor as the object of study, and analyzes terminal connection method, the signal category, the signal flow direction of indoor/outdoor between IED like relay protection device, switch status indication device, electric isolation/earthing switch control device, transfer switch, five-prevention interlocking, etc. and indoor/outdoor control, remote measurement, remote signaling and other wiring terminals of instrument. Based on the function of the original electrical schematic diagram and meeting the secondary cable wiring regulations, the optimized design of the secondary cable in the instrumentation room of the switchgear cabinet is completed by adjusting the spatial arrangement of the IEDs and terminals, optimizing the redundancy junction, and integrating the design of the parts and components, and by other technical means.

The research shows that the optimization design result of the secondary cable quantity in the instrument room of the sectional isolation cabinet is obvious, such as the control signal is reduced from 33 to 20 before optimization; the telecommunication signal is reduced from 30 to 16 before optimization; and the telemetry signal is reduced from 78 to 40 before optimization. The overall number of crossing cables was reduced from 193 to 109 before optimization, and the overall optimization rate reached 43.5%.

The research results of this thesis can provide guidance and reference for the research on lightweighting of secondary cables in intelligent miniaturized switchgear, which has a certain value of engineering application.

Keyword: Intelligent miniaturization, sectional isolation cabinet, lightweighting of secondary cables