Statistical analysis of audible noise generated by AC corona discharge from single corona sources. Issue 3 (1st September 2018)

• Record Type: Journal Article
• Authors: Li, Xuebao; Wang, Jing; Lu, Tiebing; Cui, Xiang
• Is Part Of: High voltage. Volume 3:Issue 3(2018)
• Page Start: 207
• Page End: 216
• Publication Date: 2018-09-01
• Subjects: corona -- statistical analysis -- acoustic noise -- statistical distributions -- stochastic processes -- numerical analysis -- time‐domain analysis -- frequency‐domain analysis; statistical analysis -- audible noise -- AC corona discharge -- single corona sources -- time‐domain waveforms -- sound pressure pulses -- alternate current corona discharge -- pulse amplitude -- negative half cycle analysis -- positive half cycle analysis -- instantaneous voltages -- statistical distributions -- numerical fitting method -- frequency‐domain -- A‐weighted sound pressure level -- SPL -- stochastic simulation method -- AC voltage modulation -- tones emission; High voltages -- Periodicals; 621.3191
• DOI: 10.1049/hve.2017.0159
• Languages: English
• ISSNs: 2397-7264

Abstract

Abstract : Time‐domain waveforms of sound pressure pulses generated by alternate current (AC) corona discharge from single corona sources are measured. The pulse amplitude and time interval of sound pressure pulses in positive and negative half cycles are analysed separately due to large differences of the sound pressure pulses in positive and negative half cycles. The influences of instantaneous voltages on the pulse amplitude and time interval are obtained, and statistical distributions of pulse amplitude and time interval are also obtained. Besides, empirical formulas of the pulse amplitude and time interval are derived by numerical fitting method. Based on the statistical results, stochastic simulation of the sound pressure pulses is conducted, and the validity of the simulated results is given by comparing the frequency‐domain results and A‐weighted sound pressure level (SPL) with the measured ones. Finally, the stochastic simulation method is used to discuss modulating influence of AC voltage on the tones emission from AC corona discharge. Besides, the influence of the measurement time on the resultant SPL is also discussed on the basis of the stochastic model. In order to insure the SPL independent of the measurement time, the measurement time should be larger than 0.2 s.