长间隙中雷电冲击电场测量的研究

Research on the Measurement of Lightning Impulse Electric Field in Large Air Gaps

简介了自由电位式二维暂态电场传感器和传感器的标定实验，设计了在长空气间隙中当施加雷电冲击电压时用该传感器进行电场测量的实验，定量测量了有流往出现时间隙中电场的时空变化．通过对间隙中暂态电场的测量，定性得出了流注的变化特性．测量结果与文献中的有关理论相符．

The potential-free sensor for the measurement of two-dimensional transient electric field and the experiment of its calibration have been introduced. With the sensor, the experiment of mcasurement of electric field has been designed when the large air gap dischargcs occur with lightuing impulse vo1tages. The temporal and spatial change of the impulse electric field has been tCsted quantitatively when a streamer occurs in the gap. The characteristic of strcamcrs has been obtained qualitatively by the measurement of the transient e1ectric field. The tested results are inagreement with the theory in literature.