配电网载波通信的衰耗分析

从讨论配网载波可靠性的角度对载波通信的通道衰耗进行了系统的分析，在现场试验的基础上建立了配电网数字网络载波通信的通道衰耗计算公式，分析了通道衰耗的构成及各衰耗环节的大小，并在对配电网自动化载波通信进行现场试验的基础上，定量地对配电网载波通道进行了计算，其结果与现场试验数据相符。结论是：变电站的介入衰耗是配电网载波信号的主要衰耗；而线路衰耗很小，可以忽略；配电变压器的泄漏衰耗、分支线路的分支衰耗及折射衰耗与其数量有关，通过相应公式可以估算。

ATTENUATION ANALYSIS OF DISTRIBUTION LINE CARRIER CHANNELS IN DISTRIBUTION NETWORK

The paper systematically analyzes the attenuation of distribution line carrier (DLC) channels set forth by thereliability discussion of the DLC.' The equations to calculate the attenuation of DLC channels, including both constitution andmagnitude of attenuation, are derived based on the field-testing in middle voltage power network. The results quantitativelygiven by the calculation equations of the attenuation of the DLC channels are conformed to the field--testing results. Theconclusions are listed as following: OThe attenuation of substation is the main part of the whole DLC signals attenuation:@The attenuation in power line is small enough to be ignored: @The attenuation in distribution transformers and in branchpower lines, the attenuation of power line's refraction can be estimated through the proposed equations.