study of electric field distorted by space charges under positive lightning impulse voltage
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ID: 181024
2018
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Abstract
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. Keywords: Streamer, Space charge, Laplace electric field, Poisson electric field, Space charge model
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wang2018resultsstudy
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| Authors | ;Zezhong Wang;Yinan Geng |
| Journal | international journal of aerospace engineering |
| Year | 2018 |
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