高压直流放电噪声频谱特性研究与测试分析  

Research and Measurement Analysis of Audible Noise Spectrum Characteristics for High Voltage Direct Current

作　　者：唐重樾 吕玉祥[1] 

机构地区：[1]太原理工大学,物理与光电工程学院,山西太原030024

出　　处：《电力电子技术》2017年第4期111-113,117,共4页Power Electronics

摘　　要：为监测高压直流输电线路电气连接点的健康状况,从实验出发,分析在高压直流放电平台下不同放电状况的可听噪声频谱。通过对实验频谱的分析,选取7~9 kHz频段来表征直流放电的放电状态,并研究在不同尖-板电极放电距离、放电电压下的可听噪声频谱。结果表明,当放电距离恒定时,7~9 kHz的声压级随放电电压的增大而增大;当放电电压恒定时,特征频段的声压级随放电距离的增大而增大。最后,在分析结果基础上,设计了基于1/3倍频程频谱分析的高压输电线路无线监测系统,并通过实验验证了系统的可行性和有效性。For monitoring the health of electrical connection points in high voltage direct current transmission circuit, the audible noise spectrum under different discharge conditions from the experiment of high voltage discharge platform are analyzed.7-9 kHz frequency band is selected to characterize the status of direct current discharge based on the experimental spectrum.Audible noise spectrum at different discharge distance of needle-plane electrode and different discharge voltage are also researched.The results show that the sound pressure level of 7-9 kHz increases with the increase of the discharge voltage at a constant discharge distance.When the discharge voltage is constant,the sound pressure level of the characteristic frequency band increases with the discharge distance.Finally, a high voltage transmission circuit of 1/3 octave bands spectrum wireless monitoring system is designed which is proved practicable and effective through experiment.

关 键 词：噪声频谱 尖-板电极 特征频率 

分 类 号：TB526[理学—物理]