Kong Xu, Xing Wen-Qi, Xie Yan-Zhao, Zheng Zhou, Sun Zhen-Dong
College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.
Pinggao Group Co., Ltd., Pingdingshan, Henan 467000, China.
Rev Sci Instrum. 2022 Jan 1;93(1):014701. doi: 10.1063/5.0068965.
A novel nanosecond transient electric field (E-field) measurement system is developed in this paper to measure the E-field pulse caused by the operation of the high-voltage switch (switching E-field pulse) in the substation. An electrically small rod antenna is used as the receiving antenna and is matched by the operational amplifier with high input impedance to achieve broadband frequency response and stable working performance. A broadband analog optical fiber transmission system is further designed based on the high-frequency circuit model of the electronic components. Unlike the traditional frequency domain E-field measurement methods, the developed measurement system can directly output the time domain waveform of the switching E-field pulse. It also has the advantages of adjustable sensitivity, portability, and anti-electromagnetic interference. The calibrated measurement bandwidth ranges from 200 Hz to 680 MHz. Furthermore, the switching E-field pulse in an ultra-high voltage substation is measured and analyzed to verify the effectiveness of the fabricated measurement system.
本文开发了一种新型纳秒级瞬态电场（E 场）测量系统，用于测量变电站中高压开关操作所产生的电场脉冲（开关电场脉冲）。使用电小尺寸棒状天线作为接收天线，并通过高输入阻抗运算放大器进行匹配，以实现宽带频率响应和稳定的工作性能。基于电子元件的高频电路模型进一步设计了宽带模拟光纤传输系统。与传统的频域电场测量方法不同，所开发的测量系统能够直接输出开关电场脉冲的时域波形。它还具有灵敏度可调、便携以及抗电磁干扰等优点。校准后的测量带宽范围为 200 Hz 至 680 MHz。此外，对特高压变电站中的开关电场脉冲进行了测量和分析，以验证所制作测量系统的有效性。
