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1966年以来,我国采用高压充油电缆引出的水电站已有13座,拥有高压充油电缆49回,总长26355m。按电缆的电压等级区分:110kV的有10回,总长5052m;220kV的有34回,总长17703m;330kV的有5回,总长3600m。从20多年的运行情况看,电缆及其终端头的性能基本上是良好的;但由于制造、施工和运行经验不足,以及管理等原因,电缆在运行中出现过铅包漏油、护层绝缘降低、电缆油介质损失角正切(tgδ)值增大和失压进气等问题。
Since 1966, China has adopted 13 high-voltage oil-filled cable hydropower stations, with 49 high-voltage oil-filled cables, a total length of 26355m. Divided by the voltage level of the cable: 10kV 110kV, total length 5052m; 220kV has 34 times, the total length of 17,703m; 330kV has 5 times, the total length of 3600m. From over 20 years of operation, the performance of the cable and its terminal head is basically good; however, due to manufacturing, construction and operation experience, management and other reasons, the cable has oil leakage during operation, insulation of the sheath Reduce the cable dielectric loss tangent (tgδ) value increases and loss of pressure intake and other issues.