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In recent years, the phenomenon of electrolytic corrosion on porcelain insulators’ iron caps has occurred in many HVDC transmission lines in China such as the Yunguang, Xiangshang, Tianguang, Gaozhao and Xingan HVDC lines. The validity of using U-shaped zinc rings to restrain iron caps’ electrolytic corrosion is tested and verified in this paper. In order to research the influence of U-shaped zinc...
In recent years, hardware corrosion phenomenon occurred on several HVDC transmission lines in China, such as ±800kV Yunguang and Xiangshang UHVDC transmission lines, ±500kV Xingan, Gaozhao and Tianguang lines. The iron cap corrosion problem occurred on the negative polarity and pin corrosion emerged on the positive polarity of the transmission lines. The corrosion condition of iron cap on negative...
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