一种高压输电线路故障的单端测距定位方法
By using the Prony algorithm and positive sequence current iteration method in high-voltage transmission line fault location, combined with the symmetrical component method, the ranging error problem of single-end ranging method in ground fault is solved, and high-precision fault location is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WEIHAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
- Filing Date
- 2024-01-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing single-end ranging methods for high-voltage transmission lines have large ranging errors when facing ground faults, especially when the transition resistance is large. Furthermore, conventional methods are not very responsive to such faults, which affects the ranging accuracy.
The Prony algorithm is used to collect power frequency electrical quantities, calculate the system impedance at both ends, and construct an iterative formula for fault distance using the positive sequence current iteration method. Combined with the symmetrical component method, single-phase and two-phase grounding faults are analyzed to improve the distance measurement accuracy.
By accurately extracting the characteristics of transient fault signals, the error caused by transition resistance is overcome, the accuracy of single-end ranging is improved, and the fault point can be located quickly and accurately.
Smart Images
Figure CN117849532B_ABST