摘要
高压变电站接地网腐蚀会增加高压输供电设备的跳闸风险,导致大面积停电。针对高压变电站接地网腐蚀与服役安全问题,对接地网材料选型、防腐蚀措施以及腐蚀诊断和无损监测技术进行了综述。介绍了目前我国接地网面临的腐蚀情况和存在的主要问题,讨论了影响输变电站接地网腐蚀的主要因素、腐蚀类型和防腐蚀措施,并对各种防腐蚀措施的优劣进行了对比分析。最后总结了目前接地网腐蚀常用的无损监检测方法,并对接地网防腐蚀对策和腐蚀状态的快速诊断技术提出了展望。
Grounding grid of high voltage transformer substation often suffer from severe soil corrosion, leading to increasing risk of tripping for power supply equipment and resulting in large-scale blackouts. In this paper, we reviewed the research progress on service safety and anti-corrosion of the underground steel grid of high-voltage transformer substation, including the material selection of groundinggrid, anti-corrosion methods and non-destructive corrosion monitoring techniques. In addition, the types of corrosion and the main influence factors relevant to the grounding grid, as well as the advantages and disadvantages of different corrosion inhibition methods are also concerned. As an efficient evaluation measurement, several methods of defect diagnosis and corrosion monitoring techniques used in grounding grid are also reviewed. Finally, we prospect for the development about the health diagnosis methods of grounding grids, as well as the anti-corrosion strategy.
引文
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