Method and detector for identifying insulator flashover

Details Method and detector for identifying insulator flashover Method and detector for identifying insulator flashover

1990-01-29

1992-08-04

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324551, G01R 3102

Patent

active

051362481

ABSTRACT:
A method and detector for monitoring electrical strikes along a power transmission distribution system are described. The method and detector identify the location within the transmission system where an insulator flashover event has occurred. The method includes sensing the magnetic field about the live transmission line(s) upstream and downstream from each transmission tower and providing signals representative of the upstream and downstream magnetic fields. These signals are then compared and a flashover event signal is provided whenever the signals representative of the magnetic fields differ about a tower. The event signal identifies the tower within the system on which the insulator flashover occurred. A detector corresponding to the method is also provided.

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J. G. Anderson, EPRI Transmission Line Reference Book, 345 KV and Above, Chapter 12 "Lightning Performance of Transmission Lines", pp. 545-557, 1987.
M. P. Perry, J. M. Houston, "Fault Location in SF6 Insulated Conductors Using Direct Fluxgate Magnetometry", IEEE Transactions on Power Apparatus & Systems, vol. PAS-102, No. 2, Feb. 1983, pp. 312-314.

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