摘要
接地网是涉及电网安全的重要隐蔽设施,2006年湖北电网对已经投入使用15年及以上的20个220 kV变电站进行了接地网开挖检查,对土壤环境、材质、接地网腐蚀散流特性等多方面进行了研究和综合分析,发现了引起接地网腐蚀的主要原因与土壤的酸碱性和土壤中含有的侵蚀性离子(Cl-+SO42-)总量密切相关,预估了还可以安全运行的年限,提出了保证安全运行的技术对策。
The ground grid is a concealed and important equipment to be involved with the safety of power grid. In 2006,in the twenty 220 kV substations,which have been running for 15 years or more, their ground grids were excavated and inspected. Their soil incumstance, material quality, ground grid corrosion and looseness characteristic, were studied and comprehensively analyzed with multi-aspects. It was found that the main cause which leads the ground grid corrosion is intimately related to the acid-base of the soil and the total quantity of corrosive ion （ Cl4 - ＋ SO^2- ） in the soil. The safe operation term of years was also predicted. The technical countermeasure to guarantee the safe operation was proposed.
出处
《湖北电力》
2007年第4期5-7,共3页
Hubei Electric Power
