Statistical characteristic in time-domain of direct current corona-generated audible noise from conductor in corona cage

Document Type

Article

Publication Date

3-4-2016

Publication Title

Physics of Plasmas

Abstract

The corona-generated audible noise (AN) has become one of decisive factors in the design of high voltage direct current (HVDC) transmission lines. The AN from transmission lines can be attributed to sound pressure pulses which are generated by the multiple corona sources formed on the conductor, i.e., transmission lines. In this paper, a detailed time-domain characteristics of the sound pressure pulses, which are generated by the DC corona discharges formed over the surfaces of a stranded conductors, are investigated systematically in a laboratory settings using a corona cage structure. The amplitude of sound pressure pulse and its time intervals are extracted by observing a direct correlation between corona current pulses and corona-generatedsound pressure pulses. Based on the statistical characteristics, a stochastic model is presented for simulating the sound pressure pulses due to DC corona discharges occurring on conductors. The proposed stochastic model is validated by comparing the calculated and measured A-weighted sound pressure level (SPL). The proposed model is then used to analyze the influence of the pulse amplitudes and pulse rate on the SPL. Furthermore, a mathematical relationship is found between the SPL and conductor diameter, electric field, and radial distance.

Volume

23

Issue

3

DOI

https://doi.org/10.1063/1.4942941

ISSN

1070-664X

Comments

ESSN: 1089-7674

Rights

This is a RoMEO green journal - Must link to publisher version

© 2016 AIP Publishing LLC.

Link to Full Text

Share

COinS