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Breakdown Process on Rod-Rod Air Gap under Oscillating Lightning Impulse Voltage
High Voltage ( IF 4.4 ) Pub Date : 2020-06-01 , DOI: 10.1049/hve.2019.0281
Akif Gürlek 1
Affiliation  

This study presents the discharge process on rod–rod electrodes under oscillating lightning impulse voltage. For this purpose, a measurement system has been developed to record the discharge currents at both rod electrodes simultaneously and to photograph the spatial propagation of the discharges. The measurement results of the discharge process are shown for an air gap of s = 150 cm and for a superimposed frequency of f = 200 kHz . Like the standardised lightning impulse voltage, three consecutive phases of discharge have been identified before a breakdown occurs. These are streamer discharge phase, channel transition phase and channel formation phase. The three phases are described, interpreted and their correlation is shown. On the basis of the oscillations, the discharge processes recur periodically if the momentary voltage is higher than the mean curve of the oscillating lightning impulse voltage. The streamer discharge emerges foremost at the positive rod electrode and propagates toward the grounded rod electrode. Its propagation depends on the voltage crest value. Arriving at the grounded rod electrode, the channel transition phase begins. There the discharge moves back to the positive rod electrode due to recombination and generation. Then the discharge constricts to the positive rod electrode, which forms a channel. Simultaneously, at the grounded rod electrode, a channel is also emerging. In each period, the channel will build up stepwise. The channel leads to the main discharge of the oscillating lightning impulse voltage.

中文翻译:

振荡雷电冲击电压下杆-杆气隙的击穿过程

这项研究提出了在振荡的雷电冲击电压下棒-棒电极上的放电过程。为此目的,已经开发了一种测量系统,以同时记录两个杆电极上的放电电流并拍摄放电的空间传播。示出了对于s = 150cm的气隙和对于f = 200kHz的叠加频率的放电过程的测量结果。像标准的雷电冲击电压一样,在击穿发生之前已经确定了三个连续的放电阶段。这些是流光放电阶段,通道过渡阶段和通道形成阶段。描述,解释了三个阶段,并显示了它们的相关性。根据振荡,如果瞬时电压高于振荡雷电冲击电压的平均曲线,则放电过程会周期性地重复进行。流光放电首先出现在正极杆电极上,并向接地的杆电极传播。它的传播取决于电压峰值。到达接地的棒状电极后,通道过渡阶段开始。在那里,由于复合和生成,放电移回到正极棒电极。然后,放电收缩至形成通道的正极棒电极。同时,在接地的棒状电极上,也出现了一个通道。在每个时期,渠道都会逐步建立。该通道导致振荡的雷电冲击电压的主放电。流光放电首先出现在正极杆电极上,并向接地的杆电极传播。它的传播取决于电压峰值。到达接地的棒状电极后,通道过渡阶段开始。在那里,由于复合和生成,放电移回到正极棒电极。然后,放电收缩至形成通道的正极棒电极。同时,在接地的棒状电极上,也出现了一个通道。在每个时期,渠道都会逐步建立。该通道导致振荡的雷电冲击电压的主放电。流光放电首先出现在正极杆电极上,并向接地的杆电极传播。它的传播取决于电压峰值。到达接地的棒状电极后,通道过渡阶段开始。在那里,由于复合和生成,放电移回到正极棒电极。然后,放电收缩至形成通道的正极棒电极。同时,在接地的棒状电极上,也出现了一个通道。在每个时期,渠道都会逐步建立。该通道导致振荡的雷电冲击电压的主放电。通道过渡阶段开始。在那里,由于复合和生成,放电移回到正极棒电极。然后,放电收缩至形成通道的正极棒电极。同时,在接地的棒状电极上,也出现了一个通道。在每个时期,渠道都会逐步建立。该通道导致振荡的雷电冲击电压的主放电。通道过渡阶段开始。在那里,由于复合和生成,放电移回到正极棒电极。然后,放电收缩至形成通道的正极棒电极。同时,在接地的棒状电极上,也出现了一个通道。在每个时期,渠道都会逐步建立。该通道导致振荡的雷电冲击电压的主放电。
更新日期:2020-06-01
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