近地面电晕电流组网观测与数据分析

利用强电场环境中金属尖端会产生电晕放电的原理,结合无线数据传输技术,研制开发了电晕电流测量仪及其无线组网观测系统。外场试验结果表明,该套系统能够实现一定区域范围内电晕电流的组网观测。通过对电晕电流和环境电场同步观测数据的分析,得到了正、负环境电场下产生电晕电流的电场阈值以及正、负电晕电流与正、负环境电场的关系式。分析表明,利用电晕电流的测量,能够比较真实、准确地对环境电场强度进行反演。

Networking Observation and Data Analysis of Corona Current near Ground

Based on the theory that the intense electric field beneath a thunderstorm can produce corona discharge at the tip of a grounded metal point,a corona current measuring instrument was developed. Using wireless data transmission technology,the multi-station wireless networking observation of corona current was conducted.The results of field experiments show that the corona current network observation system can operate normally in a certain region.The records of the corona current and synchronous environmental electric field were also analyzed in detail.The threshold values of the positive/negative environmental electric field for initiation of corona current were obtained,and the relation between corona current and environmental electric field were determined.The analysis results indicate that the intensity of the environmental electric field can be retrieved factually and accurately from corona current measurements.