Onset voltage of positive glow corona in rod-plane gaps as influenced by temperature

Abdel‐Salam, M.; Allen, N.L.

doi:10.1049/ip-smt:20045024

Cited by 27 publications

(17 citation statements)

References 8 publications

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“…The self sustained condition of corona is that the number of positive ions N 2 generated from secondary electron avalanches is not fewer than that from the primary electron avalanche [1]. That is,…”

Section: The Photoionization Model Of Corona Inceptionmentioning

confidence: 99%

“…Suppose positive space charges distribute spherically, space charge field strength at the point of r from the center of the sphere is [1] …”

Section: The Photoionization Model Of Corona Inceptionmentioning

confidence: 99%

“…As for the coaxial electrode, space charges only affect the amplitude of electric field and do not change its direction [1].…”

Section: The Photoionization Model Of Corona Inceptionmentioning

confidence: 99%

“…Parameters of gas discharge, such as a, , and m, can be expressed as the weighted sums of corresponding parameters of dry air and vapor [1]. For example, a can be expressed by…”

Section: Determination Of Parameters In Calculatingmentioning

confidence: 99%

“…Besides air pressure, air humidity is also an important atmospheric parameter that affects corona discharge performances. However, researchers have not reached an agreement on the rule of air humidity's effect on corona discharge performances [1][2][3]. Although some corona discharge models in view of the effect of air pressure and air humidity have been proposed [4][5][6][7], corona inception voltages calculated by these models do not correspond with actual measured results under high humidity conditions [8].…”

Section: Introductionmentioning

confidence: 99%

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Influence of air pressure and humidity on positive direct current corona discharge performances of the conductor in a corona cage

Shu

Jiang

et al. 2013

Int. Trans. Electr. Energ. Syst.

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SUMMARYWith the implementation of West-to-East Power Transmission Project in China, transmission lines will inevitably pass through high altitude regions with complex atmospheric conditions. The effects of such atmospheric parameters as pressure and humidity on the corona discharge performances of conductors are complicated. Especially as to the effect of air humidity on corona inception voltage, researchers have not reached an agreement. Therefore, by adjusting air pressure and air humidity in a corona cage, the positive direct current corona discharge performances of a smooth steel tube are tested. Results indicate that corona inception voltage increases significantly with the increase of air pressure, and the calculated results by discharge model are in accordance with measured results. Yet, with the increase of absolute humidity, corona inception voltage increases slowly. Under high humidity condition, corona inception voltage decreases because of the condensation on conductor surface, which distorts the surface electric field. In view of the condensation, the calculating model is improved, whose calculated results are in line with measured results. Moreover, it is found that inception discharge is easier to turn into glow discharge under low pressure and low humidity condition. The average pulse amplitude decreases with the increase of humidity, but with the increase of pressure, it decreases first and then increases. The rising time of the discharge pulse presents increasing trend with the increase of both air pressure and air humidity. All the test results are analyzed from microscopic mechanism.

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Section: The Photoionization Model Of Corona Inceptionmentioning

confidence: 99%

“…Suppose positive space charges distribute spherically, space charge field strength at the point of r from the center of the sphere is [1] …”

Section: The Photoionization Model Of Corona Inceptionmentioning

confidence: 99%

“…As for the coaxial electrode, space charges only affect the amplitude of electric field and do not change its direction [1].…”

Section: The Photoionization Model Of Corona Inceptionmentioning

confidence: 99%

“…Parameters of gas discharge, such as a, , and m, can be expressed as the weighted sums of corresponding parameters of dry air and vapor [1]. For example, a can be expressed by…”

Section: Determination Of Parameters In Calculatingmentioning

confidence: 99%