Statistical analysis of audible noise generated by AC corona discharge from single corona sources  

作　　者：Xuebao Li Jing Wang Tiebing Lu Xiang Cui 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,102206 Beijing,People's Republic of China [2]Beijing Key Laboratory of High Voltage and EMC,North China Electric Power University,Beijing 102206,People's Republic of China

出　　处：《High Voltage》2018年第3期207-216,共10页高电压（英文）

基　　金：National Natural Science Foundation of China(grant no.51707066);the Fundamental Research Funds for the Central Universities(grant no.2017MS004).

摘　　要：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.

关 键 词：STOCHASTIC SOUND SOURCES 

分 类 号：TN2[电子电信—物理电子学]