AN ASSESSMENT OF THE HARMONIC POLLUTION DUE TO LINE CORONA

Abstract

This work deals with the phenomenon of corona on high voltage overhead transmission lines as a possible source of harmonic pollution. Starting with a validated method for simulating corona by means of distributed nonlinear shunt resistors, the distorted current waveforms for different locations on a long line could be determined. The location-dependent frequency spectrum of the line longitudinal current could be obtained through numerical Fourier analysis. It is shown, that under some operating and weather conditions, the harmonic content of the line current can attain technically unacceptable values.

KEY WORDS:

• Power Network Harmonics
• High Voltage Lines
• Corona