This refers to the noise, hum, and power loss caused by corona discharges on power transmission lines. When the voltage of a power transmission line becomes high and there are sharp points on the conductor surface or on the metal fittings of insulators, the electric field becomes stronger and corona discharges occur. Corona discharges are particularly likely to occur in rainy weather, when drops of water form and fall, creating many sharp points. The same is true when the surface of insulators is soiled by salty winds near the coast. Discharges are generally accompanied by sound, resulting in audible noise. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
送電線のコロナ放電によって生ずる雑音,騒音,電力損失などをいう。送電線の電圧が高くなり,導体表面や碍子(がいし)の金具などにとがった部分があると電界が強くなってコロナ放電が発生する。とくに雨天時にはしずくがついたり落ちたりするので尖端が多数生じたことになってコロナ放電が発生しやすい。海岸近くで塩分を含んだ風によって碍子の表面が汚損される場合も同様である。放電は一般に音を伴うので,可聴ノイズを生ずる。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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