某核电主泵变频器冷却系统高温异常处置分析  

Analysis of Abnormal High Temperature Treatment of a Frequency Inverter Cooling System of Main Pump in Nuclear Power Plant

作　　者：史磊 刘竞婷 Shi Lei;Liu Jingting(School of Mechanical Engineering,Shandong University,Jinan 250061,China;Shandong Nuclear Power Co.,Ltd.,Yantai,Shandong 264000,China;Key Laboratory of High Efficiency and Clean Mechanical Manufacture,Ministry of Education,Shandong University,Jinan 250061,China)

机构地区：[1]山东大学机械工程学院,济南250061 [2]山东核电有限公司,山东烟台264000 [3]高效洁净机械制造教育部重点实验室(山东大学),济南250061

出　　处：《机电工程技术》2024年第1期10-13,共4页Mechanical & Electrical Engineering Technology

摘　　要：某AP1000核电厂主泵变频器冷却系统出现出口温度异常高的情况,影响了主泵变频器内隔离变压器和功率单元的冷却效果,可能导致变频器故障,进而造成主泵停运和核电机组跳堆风险,对核电机组的安全稳定运行造成严重挑战。通过对变频器冷却系统内特有的温度调节阀进行结构和动作原理的分析,同时对比了其他3台主泵变频器的参数变化,准确确定了主泵变频器冷却系统出口温度异常高的原因是温度调节阀故障,并成功处理了该故障。通过总结经验,为后续AP1000核电厂主泵变频器出现类似缺陷时的处理提供了借鉴。The outlet temperature of a frequency inverter cooling system of the main pump in an AP1000 nuclear power plant is abnormally high,and affects the cooling effect of the transformer cabinet and cell cabinet in the inverter,which may cause inverter failure,main pump outage,and even nuclear power unit tripping,these risks pose serious challenges to the safe and stable operation of nuclear power units.By analyzing the structure and action principle of the special temperature regulator valve in the inverter cooling system,and comparing the parameter changes of the other three rows of main pump inverters,the reason for the abnormally high outlet temperature of the main pump inverter cooling system is turned out to be the temperature regulator valve fault,which is resolved successfully.The experience summary in this paper provides a reference for subsequent handling of similar defects in the main pump inverter of the AP1000 nuclear power plant.

关 键 词：主泵变频器 AP1000 温度 异常处置 

分 类 号：TM623[电气工程—电力系统及自动化] TM921.51