摘要
为研究智能用电9～500kHz PLC频段内信道噪声随频率和地点的变化特性,讨论了窄带噪声测量方案和噪声功率谱分析方法,并对4个地区的低压电力线信道噪声进行测量和分析。分析结果表明在9～500kHz频段内的噪声幅度从十几db到上百db之间变化,总体上随频率的增加呈下降趋势;9～250kHz之间背景噪声比较严重;同一地点A相、B相、C相的信道背景噪声相对一致,脉冲噪声不同。
In order to study the noise characteristics of variation with frequency,location within the frequency band from 9 kHz to 500kHz PLC,the method to measure channel noise and noise power spectral analysis method are discussed.The low-voltage power line channel noise data of four regions is measured and analyzed.The analysis results show that within frequency band from 9 kHz to 500 kHz noise varies from more than 10 db to a hundred db and in general it decreases with the increment of frequency.The background noise between 9 kHz and 250 kHz is more serious.In the same location A phase,B phase,C phase background noise is accordance while impulse noise is different.
出处
《电子测量技术》
2012年第3期95-99,共5页
Electronic Measurement Technology
关键词
低压电力线通信
噪声测量
噪声特性分析
low-voltage powerline communication
noise measurement
noise characteristics analysis
