电-流-传质场作用下的换流阀冷却系统均压电极垢层动态沉积特性研究

doi:10.19595/j.cnki.1000-6753.tces.181252

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摘要换流阀冷却系统是特高压换流站关键设备的散热保障,也是换流阀的主要薄弱环节之一。统计结果表明超过66%的阀冷系统故障及阀冷系统腐蚀和结垢相关。不同于其他工业换热器因介质溶解度饱和产生结垢,换流阀冷却系统结垢是由均压电极发生电化学反应导致,受到电场、流场和传质场的共同作用。因此本文建立电-流-传质场作用下的换流阀冷却系统均压电极动态结垢模型,综合考虑湍流场、传质场和垢层生长特性对均压电极结垢行为的作用。首先基于换流阀垢层X射线衍射（XRD）和扫描电镜（SEM）测量结果对换流阀结垢机理进行分析;其次,构建阀段冷却系统电-流-传质场耦合模型,结合任意拉格朗日-欧拉（ALE）方法分析垢层沉积过程—耦合场双向作用的影响,并利用现场试验数据验证该模型的有效性。结果表明本文模型与试验结果吻合度较好,能够有效表征换流阀冷却系统结垢规律。此外,均压电极结垢不仅导致反应电流减小,而且会破坏冷却系统均压能力导致其失衡,电位畸变幅值达到110V。

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关键词 ：换流阀, 水冷系统, 电-流-传质场, 动态结垢, 电极反应

Abstract：The water cooling system is essential to the heat dissipation of ultra-high voltage converter station devices, and it is also one of the weak components of converter valve. Statistics show that more than 66% failures of water cooling system are associated with sediment deposition. Different from other industries heat exchanger systems that are mainly caused by solubility saturation of electrolyte, the sediment deposition on the grading electrode of converter valve is contributed by electrochemical reaction, which is affected by electrical field, turbulence field and mass transfer field. Therefore, in this paper, the dynamic deposition behavior on grading electrode is investigated under electro-turbulence-mass transfer coupling field. Additionally, the influence of turbulence, species diffusion and sediment deformation growth process is considered. Firstly, the deposition mechanism of grading electrode is discussed based on XRD and SEM measurement results, and then the mathematical model coupling electrochemical reaction-electrolyte concentration-turbulence field is proposed. In addition, the arbitrary Lagrangian-Eulerian (ALE) deformation model is proposed to describe the sediment deposition process and its influence on the coupling fields. The proposed method is verified by the measurement results, which indicates the dynamic sediment deposition behavior agrees well with the experimental results. Besides, the deposited sediment decreases the reaction current and aggravate the voltage balance ability, and the distorted voltage is over 110V.

Key words： Converter valve water cooling system electro-velocity-mass transfer fields dynamic deposition electrode reaction

收稿日期: 2018-07-23 出版日期: 2019-07-29

PACS:

TM46

基金资助:国家重点研发计划项目（2017YFB0902703）、重庆市博士后科研项目特等资助（Xm2017195）、重庆市研究生科研项目（CYS18008）资助

通讯作者: 高兵男,1987年生,博士,讲师,研究方向电气设备多物理计算及状态评估。E-mail:gaobing.cqu@gmail.com

作者简介: 贺婷婷女,1995年生,硕士研究生,研究方向为阀冷系统腐蚀与结垢的数值计算。E-mail:hetingting@cqu.edu.cn

引用本文:

贺婷婷, 高兵, 杨帆, 宋小宁, 程一杰, 刘朝. 电-流-传质场作用下的换流阀冷却系统均压电极垢层动态沉积特性研究[J]. 电工技术学报, 2019, 34(14): 2863-2873. He Tingting, Gao Bing, Yang Fan, Song Xiaoning, Cheng Yijie, Liu Chao. The Dynamic Deposition Behavior of Grading Electrode in Converter Valve Cooling System Considering Electro-Velocity-Mass Transfer Field. Transactions of China Electrotechnical Society, 2019, 34(14): 2863-2873.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.181252 https://dgjsxb.ces-transaction.com/CN/Y2019/V34/I14/2863

[1] Neubert Dr, Holweg. Siemens investigation report of scaling phenomenon on grading electrodes in thyristor valve cooling circuit[C]//Siemens Technical Note, Erlangen, 2007: 2-7.
[2] 黄伟, 冯维, 王海峰. 单元模块蒸发冷却系统的仿真分析与试验[J]. 电工技术学报, 2017, 32(2): 264-270.
Huang Wei, Feng Wei, Wang Haifeng.Simulation and experimental study on the evaporative cooling system of HVDC valve unit[J]. Transactions of China Electrochemical Society, 2017, 32(2): 264-270.
[3] 杨光亮, 邰能灵, 郑晓冬. 换流站阀水冷系统导致直流停运隐患分析[J]. 电力系统保护与控制, 2010, 38(18): 199-203.
Yang Guangliang, Tai Nengling, Zheng Xiaodong.Analysis of potential dangers leading to HVDC outage in valve cooling system[J]. Power System Protection and Control, 2010, 38(18): 199-203.
[4] Jackspm P O, Abrahamssom B, Gustavsson D.Corrosion in HVDC valve cooling systems[J]. IEEE Transactions on Power Delivery, 1997, 12(2): 1049-1052
[5] 王远游, 郝志杰, 林睿. 天广直流工程换流阀冷却系统腐蚀与沉积[J]. 高电压技术, 2006, 32(9): 80-83.
Wang Yuanyou, Hao Zhijie, Lin Rui.Primary analysis on corrosion and deposit in valve cooling system of Tian-Guang HVDC project[J]. High Voltage Engineering, 2006, 32(9): 80-83.
[6] Wang Chenxing, Liu Xuezhong, Wang Xianrong, et al.The distributing characteristics of sediment deposited on pin-type grading electrodes in inner cooling circuit of HV converter valve[C]//2015 IEEE Electrical Insulation Conference, Seattle, 2015, 10. 1109/ICACACT.2014.7223592 .
[7] 张广泰, 李杨, 吴继平, 等. 柔直换流阀散热器腐蚀数值计算研究[J]. 中国科技论文在线, 2016, 11(62): 1-8.
Zhang Guangtai, Li Yang, Wu Jiping, et al.The numerical calculation study on radiator corrosion of HVDC converter valve[J]. Science Paper Online, 2016, 11(62): 1-8.
[8] 赵文亮. 高压直流输电换流阀晶闸管铝散热器腐蚀问题研究[J]. 清洗世界, 2015, 31(12): 1-3.
Zhao Wenliang.Researching of converter valve thyristor aluminum heat sink corrosion problem of HVDC[J]. Cleaning Word, 2015, 31(12): 1-3.
[9] 卢斌先, 葛东阳, 周建辉, 等. 换流阀水路冷却系统电极反应的等效电路建模[J]. 高电压技术, 2016, 42(7): 2199-2206.
Lu Binxian, Ge Dongyang, Zhou Jianhui, et al.Equivalent electric circuit modeling for electrode reaction in valve cooling water system[J]. High Voltage Engineering, 2016, 42(7): 2199-2206.
[10] Wang Xianrong, Liu Xuezhong, Wang Chenxing, et al.Numerical calculation of current through grading electrodes in inner cooling circuit of HV converter valve[C]//IEEE Electrical Insulation and Dielectric Phenomena, Ann Arbor, 2015: 411-414.
[11] Arsalanloo A, Abbasalizadeh M.Numerical study on deposition of particles in a 90° bend in the presence of swirling flow using Eulerian-Lagrangian method[J]. Powder Technology, 2017, 320: 285-294.
[12] Sun W, Liu G, Wang L, et al.A mathematical model for modeling the formation of calcareous deposits on cathodically protected steel in seawater[J]. Electro- chimica Acta, 2012, 78(9): 597-608.
[13] 葛东阳. 换流阀冷却系统腐蚀与沉积分析模型与影响因素研究[D]. 北京: 华北电力大学, 2016.
[14] 杨丽君, 张将, 陆云才, 等. 电场对变压器绕组油纸绝缘油硫腐蚀的影响及机理研究[J]. 电工技术学报, 2018, 33(7): 1616-1625.
Yang Lijun, Zhang Jiang, Lu Yuncai, et al.Study on influence and mechanismof oil sulfur corrosion in oil-paper insulation of transformer winding under the electric field[J]. Transactions of China Electro- technical Society, 2018, 33(7): 1616-1625.
[15] 齐波, 魏振, 李成榕, 等. 交直流复合电场中油纸绝缘沿面放电现象及特征[J]. 电工技术学报, 2016, 31(10): 59-67.
Qi Bo, Wei Zhen, Li Chengrong, et al.The phenomena and characteristics of oil-paper insulation surface discharge under AC and DC voltage[J]. Transactions of China Electrotechnical Society, 2016, 31(10): 59-67.
[16] Zahraei M, Saidi M S, Sani M.Numerical simulation of electro-deposition process influenced by force convection and migration of ions[J]. Journal of Electroanalytical Chemistry, 2016, 782: 117-124.
[17] Weber I, Mallick B, Schild M, et al.Behavior of highly diluted electrolytes in strong electric fields- prevention of alumina deposition on grading electrodes in HVDC transmission modules by CO₂- induced PH-control[J]. Chemistry, 2014, 20(38): 12091-12103.
[18] Yin L, Jin Y, Leygraf C, et al.A FEM model for investigation of micro-galvanic corrosion of Al alloys and effects of deposition of corrosion products[J]. Electrochimica Acta, 2016, 192: 310-318.
[19] 冷雪, 刘晓明, 韩颖, 等. 高压SF₆断路器湍动冷气流混沌性行为[J]. 电工技术学报, 2016, 31(2): 64-69
Leng Xue, Liu Xiaoming, Han Ying, et al.The chaos behavior of the turbulent cold gas flow in the high voltage SF₆ circuit breaker[J]. TranDC3sactions of China Electrotechnical Society, 2016, 31(2): 64-69.
[20] Taleb A, Chaussé A, Dymitrowska M, et al.Simulations of corrosion and passivation phenomena: diffusion feedback on the corrosion rate[J]. Journal of Physical Chemistry B, 2004, 108: 952-958.