Fault Cause Analysis and Hidden Danger Management of Main Circulating Pump for Valve Cooling System in a Flexible DC Converter Station

doi:10.3969/j.issn.1008-0198.2025.03.013

Abstract

Abstract: Taking the failure of the main circulating pump in the valve cooling system of a ±500 kV converter station as an example, this paper introduces the failure handling measures, analyzes the failure causes, and concludes that the use of unqualified spring washers for the main circulating pump leads to the failure of the pump shaft fastening connection pair (loosening of the lock nut). Meanwhile, potential hazard inspections are carried out on other in-service main circulating pumps in this station, providing references for the safe operation of main circulating pumps in other in-service converter stations and the selection of main circulating pumps for newly-built converter stations.

Key words: valve cooling system, main circulating pump, single pump operation, fastening components

CLC Number:

TM721.1

ZHAO Zhanming, GAO Hongda, TENG Mengfeng, ZHANG Qingyuan, LiU Yang. Fault Cause Analysis and Hidden Danger Management of Main Circulating Pump for Valve Cooling System in a Flexible DC Converter Station[J]. Hunan Electric Power, 2025, 45(3): 89-94.

References

[1] 安海清,李振动,金海望,等. 张北柔直电网直流分压器二次电压测量异常引起误闭锁机理分析及改进措施[J]. 电力自动化设备,2021,41(8):156-160,168.
[2] 闫克非,李国庆,张儒峰,等. 风电场和多端柔性直流输电协同参与的受端电网分阶段调频控制策略[J]. 电力自动化设备,2025,45(4):28-36.
[3] 李云丰,孔明,曹一家,等. 柔性直流输电系统高频振荡有源和无源协调抑制策略[J]. 中国电机工程学报,2025,45(5):1874-1891.
[4] 朱思睿,王灿林,章德,等. 基于固定时间滑模控制构网型柔性直流输电系统振荡抑制[J]. 湖南电力,2024,44(4):84-92.
[5] 刘淑豪,李朝霞,荆刘攀,等. 柔性直流输电系统高频振荡分析与抑制策略综述[J]. 电工技术,2024(7):117-120,123.
[6] 李湃,王伟胜,刘纯,等. 张北柔性直流电网工程新能源与抽蓄电站配置方案运行经济性评估[J]. 中国电机工程学报,2018,38(24):7206-7214,7447.
[7] 柔性直流电网工程技术丛书编委会.柔直换流站水冷系统运检技术[M]. 北京:中国电力出版社,2024.
[8] 张增明,赵栋,陈学良,等. 换流阀外冷系统金属软管在线更换技术分析与改造[J]. 湖南电力,2021,41(6):80-84.
[9] 张增明,金海望,赵栋,等. 多功能控制阀在换流阀外水冷原水预处理系统中的设计与应用[J]. 东北电力技术,2022,43(8):45-49.
[10] 刘官,杨勇,高仕龙,等. 柔直换流阀冷却系统动设备故障诊断图形化规则推理系统研究与开发[J]. 高压电器,2024,60(10):191-197.
[11] 董熙,刘东川,江楠,等. 换流阀冷却系统数字化技术应用研究[J]. 电气技术,2024,25(12):73-79.
[12] 赵伟杰,罗薇,陈文,等. 换流阀冷却系统模块超差等异常报警信号故障处理及原因分析[J]. 电气技术,2021,22(3):69-73.
[13] 郑登升,陈宇曦,赵盛国,等. 换流阀冷却系统主循环泵的运行特性研究[J]. 机械设计与制造工程,2023,52(11):96-100.
[14] 董熙,江楠,张国华,等. 换流阀冷却系统异步电动机高阻故障识别与定位[J]. 电气技术,2024,25(11):15-21.
[15] 王翔宇. 换流站换流阀冷却系统设备运行维护策略[D]. 广州:华南理工大学,2021.
[16] 刘钊,李昊. 换流站阀冷主循环泵可靠性分析[J]. 宁夏电力,2019(6):41-45.
[17] 成功. 基于深度学习的换流站阀冷系统主循环泵的故障诊断研究[D]. 太原:太原理工大学,2022.
[18] 李钧甫,何军,朱苓. 某燃油直通管接头65Mn钢弹簧垫圈锈蚀原因[J]. 理化检验-物理分册,2022,58(1):23-27.
[19] 沙明. 弹簧垫圈叉口拉长失效分析与改善对策[J]. 科技传播,2012,4(5):107-108.