低压电力线窄带载波通信信道的衰减测量及分析

低压电力线作为通信线路，其信道特性对通信质量具有重要影响，对信道测量技术的研究非常必要。文章对传统载波衰减测量方法进行了改进，并选取典型台区，对窄带（50～500kHz）低压电力线信道的衰减进行了测量和研究。通过分析测量数据，得出在城市及城乡结合部配电台区。线缆长度不是影响窄带低压电力线载波衰减的主要因素，相对线路长度而言，线缆走势、电网节点情况、谐振效应等会对载波信号的衰减产生更大的影响。

Measurement and Analysis of The Low-voltage Power Line Narrow-band Carrier Communication Channel Attenuation

As one of communication lines, the channel characteristics of the low-voltage power line has a great impact on communication quality. Thus, it is necessary to study the channel measurement technology. This paper proposes an improved carrier attenuation measurement approach, which selects typical station areas and uses rigorous methods to test the attenuation characteristics of the narrow-band （50-500 kHz） low-voltage power line channel. By analyzing the measuring data, this paper concludes that in the city and the urban-rural integration area, the cable length is not the main factor influencing the carrier attenuation of the narrowband low voltage power line, further cable movements, grid node distribution and resonance have greater impact on the carrier signal attenuation than the cable length.