平行极板式空间电场校准装置电场均匀域的计算分析

为了实现对直流输电线路下方空间电场的精确测量,采用有限元方法分析了平行极板的直径和间隙距离对空间电场校准装置中电场均匀域的影响,仿真得到了不同极板间隙和极板直径下的均匀域的变化情况,提出了最佳校准位置随极板直径和间隙的计算公式,同时计算分析了探头引入均匀域内后的探头周围的电场畸变情况.结果 表明,均匀域随间隙距离d与高...

Calculation of Electric Field Uniform Area of Calibration Apparatus with Parallel Plate

In order to achieve accurate measurement of the total field under the DC transmission line, the finite element method is used to analyze the impact of the diameter and gap distance of the parallel plates on the uniform area of the electric field in the space electric field calibration device. The changes of the uniform area are simulated under the different size of the parallel plates. The calculation formula of the best position of the calibration device with the different diameter and gap distance is proposed. And then the distortion of the electric field around the probe is calculated after the probe is introduced into the uniform domain. The results show that the uniform domain increases as the ratio of the gap distance d to the radius R of the high-voltage electrode plate decreases. When d/R<0.6, the centerline of the entire gap can meet the calibration requirements. When d/R>0.6, the height of the best calibration point increases with the increase of d/R. The electric field distortion coefficient caused by the probe basically remains unchanged with the change of the gap, but increases with the increase of the probe size. The research results can provide a reference for the design of the calibration device of the space electric field measuring instrument.