In this paper, the influence to electromagnetic environment was evaluated on the outside of buildings where power line communication (PLC) systems were installed to a three‐wire three‐phase power distribution line. The electric field strength was measured at 140 points in five factories, in two office buildings, and in one stadium. Since many radio waves existed in the environment, the electric field strength when PLC system was operated and was not operated was measured. The influence was evaluated by the cumulated occurrence probability because the frequency characteristics of the electric filed strength changed by the measurement points. The results showed that the occurrence probability was not changed when the PLC system was operated and was not operated. The electric field strength was calculated by the common mode current obtained from the test result, and this indicated that the occurrence probability was lower than the measured occurrence probability of electric field strength.

中文翻译：

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使用三线三相电力线的PLC系统评估对建筑物外部电磁环境的影响

在本文中，评估了在三线三相配电线上安装了电力线通信（PLC）系统的建筑物外部对电磁环境的影响。在五个工厂，两座办公楼和一个体育馆中测量了140点的电场强度。由于环境中存在许多无线电波，因此测量了运行和不运行PLC系统时的电场强度。通过累积发生概率来评估影响，因为电场强度的频率特性因测量点而改变。结果表明，当PLC系统运行和不运行时，发生概率都没有改变。