换流站冷却水管泄漏分析  

Leak Analysis of Cooling Pipe in Converter Station

作　　者：叶建锋[1] 田泽[1] 张莹[1] 姚其新[2] 熊宇 

机构地区：[1]国网湖北省电力公司电力科学研究院,湖北武汉430077 [2]国网湖北省电力公司检修公司,湖北武汉430050 [3]湖北方源东力电力科学研究有限公司,湖北武汉430077

出　　处：《湖北电力》2017年第3期32-34,38,共4页Hubei Electric Power

摘　　要：针对某500 kV换流站换流阀冷却水管发生泄漏问题,通过垢样分析、化学成分分析、射线检测、渗透检测、金相分析等手段进行分析和检测,结果表明:泄漏是由于冷却水管存在铸造缺陷,在生产后的存放、运输等过程中,腐蚀性离子因为毛细现象在缺陷内聚集,并对缺陷处的材料产生腐蚀,从而导致穿孔泄漏。In view of the cooling water pipe leakage in converter valve of a 500 kV converter station,the problem is analyzed and detected by means of scale sample analysis,chemical composition analysis,RT,PT,metallographic analysis.the results show that the leakage is due to the casting defects in the cooling pipe,then corrosive ions gather in the casting defects during storage after production,transportation process.As the material near the defects is corroded,leakage happens.

关 键 词：换流站 铸造缺陷 毛细现象 腐蚀 

分 类 号：TG146.21[一般工业技术—材料科学与工程]