户外高压隔离开关触头材料的腐蚀与防护分析
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摘要
根据《广东电网110 kV～500 kV隔离开关质量分析报告(2009—2013)》中的故障统计,因隔离开关触头过热引起的热缺陷占其总缺陷的41.2%,严重威胁到电网的稳定运行和人民的生命安全。引起热缺陷的主要原因是触头的腐蚀,为此综述影响户外高压隔离开关触头材料腐蚀的有关因素,着重分析高压隔离开关触头因电流、电场对触头材料腐蚀的影响,并提出关于触头材料改进的相关建议以及对新触头材料的展望。最后,对户外高压隔离开关使用过程中相关运维工作进行了概括,为高压隔离开关的研发、使用、改进、检修以及监控提供参考。
According to fault statistics in the quality analysis report of 110 kV～500 kV disconnector in Guangdong Power Grid(2009-2013), 41.2% of total defects are thermal defects caused by overheating of the disconnector contact, which seriously threatens stable operation of the power grid and safety of people. The main reason causing thermal defects is corrosion of the contact, therefore, this paper summarizes concerned factors affecting corrosion of contact materials of the outdoors high voltage diconnectors, analyzes influence on material corrosion caused by current and electric field, and proposes suggestions for improving contact materials and makes prospects for new contact materials. Finally, it generalizes operation and maintenance in the process of using the high voltage disconnector, which provides references for developing, using, improving, repairing and monitoring the high disconnector.
According to fault statistics in the quality analysis report of 110 kV～500 kV disconnector in Guangdong Power Grid(2009-2013), 41.2% of total defects are thermal defects caused by overheating of the disconnector contact, which seriously threatens stable operation of the power grid and safety of people. The main reason causing thermal defects is corrosion of the contact, therefore, this paper summarizes concerned factors affecting corrosion of contact materials of the outdoors high voltage diconnectors, analyzes influence on material corrosion caused by current and electric field, and proposes suggestions for improving contact materials and makes prospects for new contact materials. Finally, it generalizes operation and maintenance in the process of using the high voltage disconnector, which provides references for developing, using, improving, repairing and monitoring the high disconnector.
引文
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