工频电场测量仪支架材质对空间电场影响研究

Study on Influence of Stent Material of Power Frequency Electric Field Tester on Space Electric Field

摘要:

工频电场测试仪是测量电力设备运行电压对地表 1． 5 m 高度处电场强度的设备。为保证电场测试仪测量结 果的准确性，需要尽量减小测试仪及其附件对空间电场分布的影响; 但是由于电场测试仪及其附件的介电常数与空 气不同，实际测试时电场测试仪改变了周围电场，尤其是探头所在区域的电场，因此有必要对电场测试仪支架材质对 空间电场的影响进行深入研究。基于有限元法，利用 ANSYS MAXWELL 建立电场测试仪支架材质对空气电场影响的 分析模型，通过对不同材质支撑杆对空间电场分布的影响进行分析，为电场测试仪及其附件的材质选取、优化设计制 造提供参考。

关键词:电场强度; 有限元法; ANSYS MAXWELL; 介电常数

Abstract:

The power frequency electric field tester is a device to measure the electric field strength of the power equipment running at the height of 1． 5 m． Accurate measurement of the electric field strength requires minimizing the impact of the test equipment itself． However，the space electric field should be studied，especially the electric field in the area where the probe is located，so it is necessary to study the influence of the stent material on the space electric field． Based on the finite element method，ANSYS MAXWELL is used to establish the analysis model for the effect of the electric field tester on the space electric field． By comparing the influence of different materials on the distribution of electric field in the space，it provides a reference for the material selection and optimization of the electric field tester and its accessories．

Key words:electric field intensity; finite element method; ANSYS MAXWELL; dielectric constant