三相3線電力線を使用したPLC通信システムが建物外の電磁環境に与える影響の評価

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  • Evaluation of Influence to Electromagnetic Environment on Outside of Building by PLC System using Three-wire Three-phase Power Line
  • サンソウ 3セン デンリョクセン オ シヨウ シタ PLC ツウシン システム ガ タテモノ ガイ ノ デンジ カンキョウ ニ アタエル エイキョウ ノ ヒョウカ

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<p>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.</p>

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