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雷电流是描述闪电放电最重要的物理量,对于雷电防护相关研究意义重大,因此,雷电流测量一直是雷电研究领域的基础性工作。为了获得自然雷电流全波波形,在南京第一高楼紫峰大厦(约450 m)楼顶的避雷针处安装了一套雷电流全波测量系统,用于长期检测雷击建筑物回击电流和建筑物上行先导电流。该系统包含两套子系统,分别由雷电流传感器、数据传输系统、数据采集系统、远程控制系统构成,能够同时测量回击电流和建筑物上行先导电流,对国内特别是华东地区高塔自然雷电流研究具有重大意义。首先对所安装的雷电流测量系统进行了介绍,对测得的两组上行先导电流波形进行了全面分析,得出高建筑物上行先导电流波形的相关特征。
The lightning current is the most important physical quantity to describe the lightning discharge, which is of great significance to the research of lightning protection. Therefore, the lightning current measurement has been the basic work in the field of lightning research. In order to obtain the full-wave waveform of natural lightning current, a lightning current full-wave measurement system was installed at the lightning rod on the roof of the Zifeng Building (about 450 m), the tallest building in Nanjing, which is used for long-term detection of lightning striking back currents and building up Pilot current. The system consists of two sets of sub-systems, which are respectively composed of lightning current sensor, data transmission system, data acquisition system and remote control system. The system can measure the back-arc current and the upstream leading current of buildings at the same time. has great significance. Firstly, the lightning current measurement system installed was introduced, and the two groups of upstream pilot current waveforms were analyzed comprehensively to get the correlation characteristics of the upward lead waveform in high buildings.