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

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...

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Bibliographic Details
Published in:Physics of plasmas 2016-03, Vol.23 (3)
Main Authors: Li, Xuebao, Cui, Xiang, Lu, Tiebing, Ma, Wenzuo, Bian, Xingming, Wang, Donglai, Hiziroglu, Huseyin
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
Cages
COMPARATIVE EVALUATIONS
Computer simulation
Conductors
CORONA DISCHARGES
CORRELATIONS
Current pulses
Design factors
DIRECT CURRENT
DISTANCE
Electric corona
ELECTRIC FIELDS
ELECTRIC POTENTIAL
Electric power transmission
High voltages
NOISE
Plasma physics
Pressure pulses
Pulse rate
PULSES
Sound pressure
SOUND WAVES
Stellar coronas
Stochastic models
STOCHASTIC PROCESSES
SURFACES
Time domain analysis
Transmission lines
WEIGHT
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Summary: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-generated sound 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.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4942941