Segmented modeling method of fuse for direct current networking system based on arc resistance characteristic
By performing short-circuit tests on the fuse, collecting data to construct the arc resistance curve and performing segmented fitting, the problem of insufficient fuse modeling accuracy in the existing technology is solved, higher-precision simulation and better adaptability to working conditions are achieved, and the safety and reliability of the common DC bus system are improved.
CN120745535AActive Publication Date: 2025-10-03澄瑞电力科技(上海)股份公司
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Patent Information
- Application Number
- CN202511254737.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-04
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2045-09-04
AI Technical Summary
Technical Problem
Existing fuse modeling methods cannot accurately fit the arc resistance characteristics, resulting in insufficient protection performance during short-circuit faults, affecting the safety and reliability of the common DC bus system.
Method used
By performing a short-circuit test on the fuse, collecting short-circuit voltage and current data, constructing an arc resistance curve, and fitting the arc resistance curve equation in sections, a simulation model of controlled resistance is established, which simplifies the modeling process and improves the simulation accuracy.
Benefits of technology
It achieves higher-precision fuse simulation, can better adapt to different working conditions, reduces the number of iterations, and improves the safety and reliability of the system.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides an arc resistance characteristic-based segmented modeling method of a fuse for a direct current networking system, and relates to the technical field of common direct current bus system design, and the method comprises the steps: calculating the real-time arc resistance data of the fuse according to the continuously collected short-circuit voltage and short-circuit current at the two sides of the fuse in a short-circuit test process, and forming an arc resistance curve; intercepting an arc resistance curve from the peak moment of the short-circuit current to the slope descending moment of the arc resistance curve to obtain an arc starting stage arc resistance curve, and intercepting an arc resistance curve from the slope descending moment to the moment when the short-circuit current is zero to obtain an arc burning stage arc resistance curve; respectively carrying out data fitting according to the arc starting stage arc resistance curve and the arcing stage arc resistance curve to obtain a sectional arc resistance curve equation; and taking the arc resistance curve equation as a control signal to build and obtain a fuse simulation model based on the controlled resistor. The method has the advantages that the arc resistance curve is divided into two sections, the corresponding arc resistance curve equation is designed, the simulation precision is higher, and the method can be better suitable for different working conditions.
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