均压电极垢层电沉积模型分析与应用

doi:10.11930/j.issn.1004-9649.201805086

中国电力 ›› 2019, Vol. 52 ›› Issue (9): 86-92.DOI: 10.11930/j.issn.1004-9649.201805086

均压电极垢层电沉积模型分析与应用

程一杰¹, 贺婷婷², 宋小宁¹, 冯礼奎¹, 于志勇¹, 高兵², 杨帆², 杨旗²

1. 国网浙江省电力公司电力科学研究院, 浙江杭州 310000;
2. 重庆大学输配电装备及系统安全与新技术国家重点实验室, 重庆 400044

收稿日期:2018-05-16 修回日期:2018-11-25 出版日期:2019-09-05 发布日期:2019-09-19
通讯作者: 贺婷婷(1995-),女,通信作者,硕士研究生,从事阀冷系统腐蚀与结垢的数值计算研究,E-mail:hetingting@cqu.edu.cn
作者简介:程一杰(1989-),男,工程师,从事电力化学环保专业工作,E-mail:364149941@qq.com;宋小宁(1980-),男,高级工程师,从事电力化学环保专业工作,E-mail:40528234@qq.com;冯礼奎(1977-),男,高级工程师,从事电力行业水处理、腐蚀与防护研究,E-mail:33460887@qq.com;于志勇(1976-),男,高级工程师,从事电力化学环保专业工作,E-mail:xinmiyzy@163.com;高兵(1988-),男,博士后,讲师,从事电气设备多物理场计算及状态评估研究,E-mail:gbcqu425@cqu.edu.cn
基金资助:
中国博士后科学基金资助项目（2017M620411）；重庆市研究生科研项目（CYS18008）；2017年国网浙江省电力有限公司科技项目（5211DS160023）。

Analysis and Application of Grading Electrodes Deposition Model

CHENG Yijie¹, HE Tingting², SONG Xiaoning¹, FENG Likui¹, YU Zhiyong¹, GAO Bing², YANG Fan², YANG Qi²

1. State Grid Zhejiang Electric Power Corporation Research Institute, Hangzhou 310000, China;
2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing 400044, China

Received:2018-05-16 Revised:2018-11-25 Online:2019-09-05 Published:2019-09-19
Supported by:
This work is supported by China Postdoctoral Science Foundation Project (No.2017M620411), Graduate Research and Innovation Foundation of Chongqing,China (No.CYS18008) and Science and Technology Project of State Grid Zhejiang Electric Power Co., Ltd. (No.5211DS160023).

摘要/Abstract

摘要： 换流阀是高压直流输电系统中的核心设备，阀冷系统用于阀体组件的散热，而阀冷系统散热器腐蚀和均压电极结垢将导致换流阀运行故障，因此研究阀冷系统的腐蚀和结垢特性，对保障换流站安全可靠运行尤其重要。基于散热器腐蚀和垢层的沉积机理，应用有限元方法，建立了考虑电极表面沉积反应、物质传递过程的均压电极垢层沉积模型，所建模型能够模拟垢层生长过程、分析电极表面附近电场以及腐蚀离子浓度分布。基于该模型分析了电极表面垢层的沉积行为特性、电极表面的垢层分布，讨论了不同电压等级对垢层厚度的影响，得到垢层主要分布在高电位电极、电极尖端垢层量远大于电极平行位置以及电压等级升高，垢层厚度明显增大的仿真结果。结合实际换流站阀冷系统的运行数据和电极结垢形貌，验证了垢层沉积模型的有效性。

关键词: 高压直流输电, 换流阀, 均压电极, 垢层, 沉积模型

Abstract: The converter valve is one of the core equipment in high voltage direct current (HVDC) system, and the water cooling system is often used for heat dissipation. However, the corrosion of radiator in the cooling system and the sediment on the grading electrode will lead to fault of converter valve. It's therefore essential to study the characteristics of corrosion and deposition in the water cooling system. Based on the mechanism of radiator corrosion and sediment deposition, this paper uses the finite element method to establish a grading electrodes deposition model considering the electrode surface deposition reaction and material transfer process. The built model can investigate the growth process of the sediment, and analyze the electric field near the surface of electrodes and the distribution of the corrosion ion concentration. The deposition behavior of sediment and the distribution of sediment on grading electrodes is studied based on the proposed model, and the effect of voltage level on the thickness of sediment is discussed. The results indicated that the thickness of sediments is proportional to the voltage level, the sediment is mainly concentrated on the high-potential electrode, and the amount of sediment on the electrode tip is much larger than that on the parallel position of the electrode. In addition, the proposed model is verified by the measurement results of actual converter valve's cooling system and the sediment on the electrode.

Key words: HVDC transmission, converter valve, grading electrode, sediment, deposition model

中图分类号:

TM84

程一杰, 贺婷婷, 宋小宁, 冯礼奎, 于志勇, 高兵, 杨帆, 杨旗. 均压电极垢层电沉积模型分析与应用[J]. 中国电力, 2019, 52(9): 86-92.

CHENG Yijie, HE Tingting, SONG Xiaoning, FENG Likui, YU Zhiyong, GAO Bing, YANG Fan, YANG Qi. Analysis and Application of Grading Electrodes Deposition Model[J]. Electric Power, 2019, 52(9): 86-92.

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均压电极垢层电沉积模型分析与应用

Analysis and Application of Grading Electrodes Deposition Model

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Analysis and Application of Grading Electrodes Deposition Model

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