Measuring device and method of roughness coefficient of high-voltage conducting wire

Abstract

The invention belongs to the technical field of measurement of high pressure gas discharge electromagnetism, and discloses a measuring device and method of roughness coefficient of a high-voltage conducting wire. The measuring device is characterized in that: a cylindrical electrode is horizontally placed on a bracket, and is electrically grounded; the to-be-tested high-voltage conducting wire is horizontally fixed on support rods, and is coaxial with the cylindrical electrode; the probe of a direct-current electric field measuring device is placed in a circular hole in the cylindrical electrode, and is parallel and level with the inner surface of the cylindrical electrode; the to-be-tested high-voltage conducting wire is connected with the output end of a high-voltage direct current power supply, a synthesis electric field is formed between the inner surface of the cylindrical electrode and the to-be-tested high-voltage conducting wire, and ion current is generated; one end of a sample resistance is connected with a metal thin film, and the other end of the sample resistance is grounded; a voltmeter is connected with the two ends of the sample resistance in parallel; the output voltage of the high-voltage direct current power supply is adjusted, so as to obtain the synthesis electric field intensity at the cylindrical electrode, the ion current density and the synthesis electric field intensity of the surface of the be-tested high-voltage conducting wire; the roughness coefficient of the to-be-tested high-voltage conducting wire is obtained according to the Peek formula. According to the measuring device and method of roughness coefficient of the high-voltage conducting wire, accurate measurement of the roughness coefficient of the to-be-tested high-voltage conducting wire can be achieved.

Description

technical field [0001] The invention belongs to the technical field of high-voltage gas discharge electromagnetic measurement, and in particular relates to a measuring device and method for the roughness coefficient of a high-voltage wire. Background technique [0002] UHV DC transmission technology has become the core technology of my country's west-to-east power transmission strategy, shouldering the important mission of ensuring economic development and energy supply, reducing atmospheric smog and improving the environment. my country has successively built and put into operation a number of UHV DC transmission projects. The electromagnetic environment of UHVDC transmission lines is an important parameter in line design and operation. When the transmission line is in normal operation, due to the occurrence of the wire corona phenomenon, the air molecules around the line are ionized to generate positive and negative ions, forming space charges. Ions move directionally un...

AI Technical Summary

Problems solved by technology

[0004] However, due to the randomness of the corona phenomenon, the non-conductive point of the obtained relationship between a certain physical quantity and the voltage is often not obvious, and there is a large error in the corona onset voltage, resulting in inaccurate roughness coefficients obtained

Images