柔性直流换流阀厅全模型电场多极子边界元分析

doi:10.11930/j.issn.1004-9649.202003075

摘要/Abstract

摘要： 柔性直流换流阀厅内设备众多、结构复杂、多种介质共存且环境封闭，造成阀厅全模型电场强度数值计算建模难度大、计算规模大、采用传统方法计算效率低。对称多极子曲面边界元法计算速度快、内存占用少，适合于求解大规模问题。分别对2种不同结构的±160 kV柔性直流换流阀厅建模，应用对称多极子曲面边界元法计算阀厅全模型电场，计算中节点达到133万个。综合分析了阀塔屏蔽系统结构、桥臂电气连接方式以及阀厅布置方式对金具表面电场影响规律；掌握了阀厅空间内电场分布规律，为设备布置提供参考。所提方法为全面掌握柔性直流换流阀厅内电场分布提供有效手段，对设计过程中设备的绝缘配合具有重要意义。

关键词: 柔性直流, 换流阀厅, 全模型, 电场分布, 对称多极子曲面边界元

Abstract: The flexible HVDC converter valve hall has numerous equipment, complex structures and enclosed environment with coexistence of multiple medium, which makes the full-model electric field intensity analysis of the valve hall difficult in model building, large in calculation scale, and poor in efficiency with traditional methods. The symmetry fast multipole curved boundary element method (SFMCBEM) has the advantages of fast calculation speed and less memory consumption, and is suitable for solving large-scale problems. Two different structures of a ±160 kV flexible HVDC converter valve hall were modeled respectively and the SFMCBEM was used to calculate their full-model electric field with the number of nodes in calculation reaching up to 1.33 million. The influences of valve tower shielding system structure, bridge electric connection mode and valve hall arrangement on the surface electric field of fittings were analyzed, and the distribution characteristics of electric field in the valve hall were understood, which can provide a reference for equipment layout. The proposed method provides an effective means for understanding the electric field distribution in the flexible HVDC converter valve hall, and is of great significance for equipment insulation coordination design.

Key words: flexible HVDC, converter valve hall, full model, electric field distribution, SFMCBEM

石雨鑫, 王泽忠, 赵九才. 柔性直流换流阀厅全模型电场多极子边界元分析[J]. 中国电力, 2021, 54(8): 60-67.

SHI Yuxin, WANG Zezhong, ZHAO Jiucai. Full-Model Electric Field Analysis of Flexible HVDC Converter Valve Hall with Fast Multipole Boundary Element Method[J]. Electric Power, 2021, 54(8): 60-67.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202003075

https://www.electricpower.com.cn/CN/Y2021/V54/I8/60

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