直流单点电晕放电无线电干扰和可听噪声时域关联特性分析  

Time-domain Correlation Between Audible Noise and Radio Interference Caused by Single Positive Corona Source on the Conductor

作　　者：程露莹 李学宝 马浩 李隐飞 卢铁兵 刘元庆 CHENG Luying;LI Xuebao;MA Hao;LI Yingfei;LU Tiebing;LIU Yuanqing(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]新能源电力系统国家重点实验室,华北电力大学,北京102206 [2]中国电力科学研究院有限公司,北京100192

出　　处：《高电压技术》2019年第12期4088-4095,共8页High Voltage Engineering

基　　金：国家自然科学基金(51707066);重点研发计划(2016YFB0900800);国家电网公司科技项目(GYB17201400124)~~

摘　　要：当导线周围发生电晕放电时,会伴随空间电荷的运动,进而产生无线电干扰和可听噪声等电晕放电效应。本文基于实验室搭建的可听噪声和无线电干扰时域测量平台,实现了对正极性单点电晕放电产生的可听噪声和无线电干扰时域波形的同时采集;然后借助可听噪声和无线电干扰脉冲在时域上的一一对应关系,对测量信号的背景干扰进行剔除;最后对去噪后的可听噪声及无线电干扰时域波形参数进行了分析,获得了可听噪声和无线电干扰脉冲峰值及持续时间的关联关系。分析结果表明:提出的可听噪声脉冲波形模拟方法可以只测量无线电干扰波形就得到可听噪声脉冲波形。对比模拟波形与测量波形,得到的总声压级误差小于3dB(A),验证了方法的有效性。研究结果为电晕放电可听噪声的测试和预测提供了一种新的思路。When corona discharge occurs on the surface of the conductors,it will be accompanied by the drift of the corona-generated space charges which can generate many corona effects such as radio interference(RI)and audible noise(AN).Based on the time-domain measurement platform,the time-domain waveforms of AN and RI from single DC positive corona source were obtained and analyzed.The one-to-one relationship between RI pulses and sound pressure pulses was used to remove the interferences from background noise.After the interferences are removed,the relationships between AN and RI pulse amplitudes were obtained through statistical analysis.The analysis results show that the proposed simulation method of AN pulse waveforms can gain AN pulse waveforms by measuring only RI waveforms.Compared the simulated waveform with the measured waveform,the SPL error is less than 3 dB(A),which verifies the effectiveness of the method proposed in this paper.The results can provide a new way of testing and forecasting AN.

关 键 词：直流电晕放电 无线电干扰 可听噪声 时域特性 脉冲波形模拟. 

分 类 号：TN9[电子电信—信息与通信工程]