Abstract
Noncontact monitoring technique of mechanical and electrical states is increasingly attractive for the overhead transmission system. This paper proposes a new technique to detect the tower inclination and transmission line sag, and measure transmission current simultaneously. The key of this technique is to use the ground magnetoresistive (MR) sensor to measure the magnetic flux density along the center line from the three-phase transmission lines. Moreover, the magnetic field (MF) calculation formulas for a tilted tower are given in this paper. Finally, with MF calculation formulas, an algorithm based on artificial immune system (AIS) is applied to estimate the transmission line sag and tower tilt angles, and reconstruct currents. Model simulations of an overhead transmission system are carried out to verify the idea. The simulation results validate the feasibility of this noncontact approach to estimate mechanical parameters and reconstruct electrical parameters for overhead transmission system.
| Original language | English |
|---|---|
| Article number | 8694963 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 55 |
| Issue number | 7 |
| Online published | 22 Apr 2019 |
| DOIs | |
| Publication status | Published - Jul 2019 |
Funding
ACKNOWLEDGMENT This work was supported in part by the Seed Funding Program for Basic Research, Seed Funding Program for Applied Research, and Small Project Funding Program from the University of Hong Kong, ITF Tier 3 Funding under Grant ITS/203/14, Grant ITS/104/13, and Grant ITS/214/14, in part by RGC-GRF under Grant HKU 17210014 and Grant HKU 17204617, and in part by the University Grants Committee of Hong Kong under Contact AoE/P-04/08.
Research Keywords
- Current reconstruction
- magnetic field (MF) sensing
- overhead transmission system
- sagging
- tower inclination