630 MW氢冷发电机氢气纯度下降的原因分析及处理  

Cause Analysis and Treatment on Hydrogen Purity Drop in the 630 MW Hydrogen-Cooled Generator

作　　者：徐峰 XU Feng(Zhangjiagang Shazhou Electric Power Co.,Ltd.,215600)

机构地区：[1]张家港沙洲电力有限公司,215600

出　　处：《电机技术》2024年第6期44-47,共4页Electrical Machinery Technology

摘　　要：文章介绍了双流环密封油系统的工作原理,并针对沙洲电厂630 MW发电机氢气纯度异常下降的情况,分析了双流环系统发电机氢气纯度下降的原因,并制定了相应检查方案。经排查确认氢气纯度下降是由密封油压力调整不当,致使发电机密封瓦处空侧油大量窜至氢侧,氢侧密封油中的空气析出进入发电机内导致的。The paper introduces the working principle of the double-f low ring sealing oil system,analyzes the cause of hydrogen purity drop in the double-flow ring system and formulates corresponding inspection plans,based on the abnormal drop in hydrogen purity in a 630MW generator at Shazhou Power Plant.After investigation,it is confirmed that the drop of hydrogen purity is caused by improper adjustment of the sealing oil pressure,leading to a large amount of air-side oil leak from the generator's sealing bushing to the hydrogen side,making the air from the hydrogen-side sealing oil enter into inside of the generator.

关 键 词：氢冷发电机 氢气纯度 补氢 提纯 

分 类 号：TM307[电气工程—电机]