直流换流站阀厅金具表面电场强度数值模拟分析  

Numerical simulation analysis of surface electric field strength of valve hall fittings in DC converter station

作　　者：宋铁创 徐健涛 杨国华 李学宝 许爱斌 SONG Tiechuang;XU Jiantao;YANG Guohua;LI Xuebao;XU Aibin(PingGao Group Co.,Ltd,Henan,Pingdingshan 467000,China;School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 100096,China;Beijing Internet Based Engineering Application Co.,Ltd,Beijing 100192,China)

机构地区：[1]平高集团有限公司,河南平顶山467000 [2]华北电力大学电气与电子工程学院,北京100096 [3]北京云道智研科技有限公司,北京100192

出　　处：《自动化与仪器仪表》2022年第11期64-68,共5页Automation & Instrumentation

基　　金：国家自然科学基金资助项目(52077073)。

摘　　要：金具表面受到探测设备影响,产生大量感应电荷,无法精准测量电场强度。为了解决这个问题,提出了直流换流站阀厅金具表面电场强度数值模拟分析方法。构建阀厅金具表面电场分布三维模型,分析阀厅金具表面的电场分布情况。结合三维自适应有限元并行模拟方式,创建网格对象,构建层次网络结构。在该结构上设置单元误差指标,判断数值模拟精度是否达到标准要求。调整网格分布,确保网格层负载。确定静电场和恒定电场的不同介质交界面边界条件,获取介电常数和电导率电气参数。以此为依据,构建金具表面电场强度数值模型,并判断金具表面电场强度是否达到起晕场临界值,完成数值模拟分析。由数值求解结果可知,选择的D侧管母金具电场强度未在起晕场强数值范围内,不会出现电晕危险,符合直流换流站阀厅电场控制标准。研究结果为直流换流站阀厅金具的设计提供可靠技术支持,具有借鉴价值。The surface of the instrument is affected by the detection equipment, resulting in a large amount of inductive charge, so the electric field intensity cannot be accurately measured. In order to solve this problem, a numerical simulation method of electric field intensity on the surface of valve hall fittings of DC converter station is presented. A three-dimensional model of electric field distribution on the surface of valve hall fittings was established to analyze the electric field distribution on the surface of valve hall fittings. Combined with 3 d adaptive finite element parallel simulation, grid object is created and hierarchical network structure is constructed. The element error index is set on the structure to judge whether the numerical simulation accuracy meets the standard requirements. Adjust grid distribution to ensure grid layer load. The boundary conditions of different dielectric interfaces of static and constant electric fields were determined, and the electrical parameters of permittivity and conductivity were obtained. Based on this, a numerical model of the electric field intensity on the surface of the metalware was constructed, and the numerical simulation analysis was completed to judge whether the electric field intensity on the surface of the metalware reached the critical value of the starting field. It can be seen from the numerical solution results that the electric field intensity of the selected d-side tube mother metal is not within the range of the intensity of the starting field, and there is no corona danger, which meets the electric field control standard of the valve hall of the DC converter station. The research results provide reliable technical support for the design of valve hall fittings of DC converter station and have reference value.

关 键 词：直流换流站阀厅 金具表面 电场强度 数值模拟 

分 类 号：TM151.2[电气工程—电工理论与新技术]