舟山直流输电海缆铠装电腐蚀故障分析

从舟山直流输电海缆钱装电腐蚀产生的两次故障，分析了直流杂散地电流对地下设备的严重危害性，并对提高直流输电海缆的运行可靠性、减轻海缆铠装的直流电腐蚀，提出了运行管理和技术措施上的改进意见。

This paper analpe two accidents that breaking off the armoured cable for Zhoushan HVDC pro-ject.Tbe seriousness of DC electrical corrosion is explained, consequently, the necessity of establishing DCground electrode and the attensbo contents for design of the DC electnde are pointed out for the concerned de-partments.