Corona generating and measuring device of high-voltage DC wire

Abstract

The invention discloses a corona generating and measuring device of a high-voltage DC wire. The corona generating and measuring device comprises a base and a corona cage, wherein the base is a U-shaped base, the corona cage is placed in the middle of the U-shaped base, and the corona cage is of a hollow cylinder structure; the middle of the corona cage is a measurement segment, the two sides of the corona cage are protection segments, and the measurement segment and the protection segments are all connected to ground potential; the middle of the corona cage is provided with the wire, and the wire and the corona cage form a coaxial electrode system; the two ends of the wire are provided with voltage-sharing devices, one voltage-sharing device is connected with a high-voltage DC source, the two ends of the high-voltage DC source are connected to a voltmeter in parallel, and the measurement segment is connected to an ampere meter. According to the corona generating and measuring device of the high-voltage DC wire, the corresponding current change of a positive corona and the corresponding current change of a negative corona of the copper wire can be measured, and therefore the influences on corona volt-ampere characteristics by the surface roughness of different wires under the condition of different voltage polarities can be measured.

Description

technical field [0001] The invention relates to a measuring device for electric power equipment, in particular to a measuring device for measuring high-voltage direct-current wire corona generation and measurement. Background technique [0002] The volt-ampere characteristic of corona is an important indicator for studying DC conductors. At present, the full-space corona field model can be used to measure the corona volt-ampere characteristics of high-voltage conductors, but in the full-space corona field model, the values ​​of many parameters There is a lot of controversy. It is generally believed that the inception field strength of the wire surface has nothing to do with the electrode material, and the roughness of the wire surface has a certain impact on the inception field strength, but the full-space corona field model cannot measure this effect. Contents of the invention [0003] In view of the above defects, the present invention provides a corona generation and me...

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Problems solved by technology

[0002] The volt-ampere characteristic of corona is an important indicator for studying DC conductors. At present, the full-space corona field model can be used to measure the corona volt-ampere characteristics of high-voltage conductors, but in the full-space corona field model, the values ​​of many parameters There is a lot of controversy. It is generally believed that the inception field strength of the wire surface has nothing to do with the electrode material, and the roughness of the wire surface has a certain impact on the inception field strength, but the full-space corona field model cannot measure this effect.

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