Analysis of Spectrum Characteristics of Audible Noise Generated by AC Corona Discharge
The audible noise (AN) generated by alternative current (AC) corona discharge is mainly composed of wide frequency band and pure tones at harmonics of power frequency. In order to understand the distinct spectrum characteristics of AN, the time-domain waveforms of AN occurring on the surface of cond...
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State Grid Energy Research Institute
2021-05-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202007078 |
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| author | Mingxiang HUANG Zhibin GUO Lizhi PAN Xuebao LI |
| author_facet | Mingxiang HUANG Zhibin GUO Lizhi PAN Xuebao LI |
| author_sort | Mingxiang HUANG |
| collection | DOAJ |
| description | The audible noise (AN) generated by alternative current (AC) corona discharge is mainly composed of wide frequency band and pure tones at harmonics of power frequency. In order to understand the distinct spectrum characteristics of AN, the time-domain waveforms of AN occurring on the surface of conductor are measured using the time-domain test platform for AC corona-generated audible noise. Based on the analysis of its time and frequency characteristics, the AN is divided into three components: impulsive noise, ion-migration noise and background noise, and a wavelet-transform based noise extraction method is proposed to separate them. The impact mechanism of the AC voltage modulation and space ion-migration on conductor pure tones as well as the variation characteristics of pure tones are obtained. The result shows that under the effect of AC voltage modulation, the periodic pulse cluster noise and the reciprocating migration noise of space ions constitute the pure tones, while the ion migration has larger effects than the voltage modulation. The pure tones become prominent with the increase of voltage and share more proportion of the total sound pressure level. Finally, the motion characteristics of space ions in the process of corona discharge are presented to give a qualitative explanations for the spectrum characteristics of AN. |
| format | Article |
| id | doaj-art-e45020254d55431cbfd7b7e8410cd82b |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2021-05-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-e45020254d55431cbfd7b7e8410cd82b2025-08-20T02:53:03ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492021-05-0154511112010.11930/j.issn.1004-9649.202007078zgdl-54-5-huangmingxiangAnalysis of Spectrum Characteristics of Audible Noise Generated by AC Corona DischargeMingxiang HUANG0Zhibin GUO1Lizhi PAN2Xuebao LI3State Grid Fujian Electric Power Co., Ltd. Construction Branch, Fuzhou 350012, ChinaState Grid Fujian Electric Power Co., Ltd. Construction Branch, Fuzhou 350012, ChinaState Grid Fujian Electric Power Co., Ltd. Construction Branch, Fuzhou 350012, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaThe audible noise (AN) generated by alternative current (AC) corona discharge is mainly composed of wide frequency band and pure tones at harmonics of power frequency. In order to understand the distinct spectrum characteristics of AN, the time-domain waveforms of AN occurring on the surface of conductor are measured using the time-domain test platform for AC corona-generated audible noise. Based on the analysis of its time and frequency characteristics, the AN is divided into three components: impulsive noise, ion-migration noise and background noise, and a wavelet-transform based noise extraction method is proposed to separate them. The impact mechanism of the AC voltage modulation and space ion-migration on conductor pure tones as well as the variation characteristics of pure tones are obtained. The result shows that under the effect of AC voltage modulation, the periodic pulse cluster noise and the reciprocating migration noise of space ions constitute the pure tones, while the ion migration has larger effects than the voltage modulation. The pure tones become prominent with the increase of voltage and share more proportion of the total sound pressure level. Finally, the motion characteristics of space ions in the process of corona discharge are presented to give a qualitative explanations for the spectrum characteristics of AN.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202007078ac corona dischargeaudible noisepure tonesspectrum characteristics |
| spellingShingle | Mingxiang HUANG Zhibin GUO Lizhi PAN Xuebao LI Analysis of Spectrum Characteristics of Audible Noise Generated by AC Corona Discharge Zhongguo dianli ac corona discharge audible noise pure tones spectrum characteristics |
| title | Analysis of Spectrum Characteristics of Audible Noise Generated by AC Corona Discharge |
| title_full | Analysis of Spectrum Characteristics of Audible Noise Generated by AC Corona Discharge |
| title_fullStr | Analysis of Spectrum Characteristics of Audible Noise Generated by AC Corona Discharge |
| title_full_unstemmed | Analysis of Spectrum Characteristics of Audible Noise Generated by AC Corona Discharge |
| title_short | Analysis of Spectrum Characteristics of Audible Noise Generated by AC Corona Discharge |
| title_sort | analysis of spectrum characteristics of audible noise generated by ac corona discharge |
| topic | ac corona discharge audible noise pure tones spectrum characteristics |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202007078 |
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