高エネルギー雷撃を模擬した直流アークによる高張力・高耐食OPGWの素線溶断特性

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  • Melting and Breaking Characteristics of Strands of High-strength and High-corrosion-resistant OPGW due to DC Arc Discharge Simulating High-energy Lightning Strike
  • コウエネルギー ライゲキ オ モギ シタ チョクリュウ アーク ニ ヨル コウチョウリョク ・ コウタイショク OPGW ノ ソ センヨウダントクセイ

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<p>Metal strands of composite fiber-optic ground wire (OPGW) are sometimes melted and broken by high-energy lightning strikes. Direct current (DC) arc tests simulating the lightning strikes have thus been performed to obtain the melting and breaking characteristics of OPGW strands. J-Power Transmission Network Co., Ltd. has developed high-strength and high-corrosion-resistant OPGW for long-span 500kV overhead transmission lines crossing straits. This paper describes the melting and breaking characteristics of the OPGW strands due to DC arc discharge simulating high-energy lightning strike. In this research, the tests were performed using two kinds of arc, one was the arc supposing summer lightning whose polarity was negative with a relatively short duration, and the other was the arc supposing winter lightning whose polarity was positive with a relatively long duration. Furthermore, the calculations regarding the melting and breaking of OPGW strands were carried out, and the calculation results showed a tendency similar to the test results.</p>

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