Study of electric field distorted by space charges under positive lightning impulse voltage
Study of electric field distorted by space charges under positive lightning impulse voltage
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DOI：
10.1016/j.rinp.2018.01.037
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发表时间：
2018-03
影响因子：
5.3
通讯作者：
Zezhong Wang;Y. Geng
中科院分区：
文献类型：
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作者：
Zezhong Wang;Y. Geng
实际上，许多绝缘问题都与电场有关。而电场测量是高压工程的一个重要研究课题。特别是空间电荷引起的电场畸变是流光理论的基础，因此定量测量空间电荷引起的泊松电场对研究气隙放电机理具有重要意义。在本文中，我们使用光电集成传感器测量了正雷击电压下1 m棒面间隙内的电场分布。为了验证这种定量测量的可靠性，我们将测量结果与数值模拟的计算结果进行了比较。用不同电极测量了空间电荷区外1 m棒平面轴线上的电场时域波形。将空间电荷产生的泊松电场与外加电压产生的拉普拉斯电场分离，测量了不同外加电压和不同位置下泊松电场的幅值和变化。该工作也为高压下强电场的直接测量提供了可行的依据。
Actually, many insulation problems are related to electric fields. And measuring electric fields is an important research topic of high-voltage engineering. In particular, the electric field distortion caused by space charge is the basis of streamer theory, and thus quantitatively measuring the Poisson electric field caused by space charge is significant to researching the mechanism of air gap discharge. In this paper, we used our photoelectric integrated sensor to measure the electric field distribution in a 1-m rod-plane gap under positive lightning impulse voltage. To verify the reliability of this quantitative measurement, we compared the measured results with calculated results from a numerical simulation. The electric-field time domain waveforms on the axis of the 1-m rod-plane out of the space charge zone were measured with various electrodes. The Poisson electric fields generated by space charge were separated from the Laplace electric field generated by applied voltages, and the amplitudes and variations were measured for various applied voltages and at various locations. This work also supplies the feasible basis for directly measuring strong electric field under high voltage.