Elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines

A technology of transmission line and corona inception voltage, which is applied in the direction of testing dielectric strength, etc.

Active Publication Date: 2014-06-25
STATE GRID ELECTRIC POWER RES INST
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  • Abstract
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In the field of corona inception voltage altitude correction method for fittings, there is no literature disclosing this technology

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  • Elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines
  • Elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines
  • Elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The altitude correction method for the corona inception voltage of the fittings of the high-altitude transmission line provided by the present invention is a correction method based on the corona discharge characteristics test data of the fittings under the simulated altitude carried out in the environmental climate laboratory of the UHV AC test base, and adopts an exponential fitting correction method , which can be used for altitude correction calculations in the design and optimization studies of high-altitude 330kV AC transmission lines.

[0022] The method is based on a large amount of simulated test data under high-altitude conditions, and is obtained through exponential curve fitting.

[0023] Visible corona tests were carried out in the environmental climate laboratory of the UHV AC test base, and five different types of 330kV AC transmis...

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Abstract

The invention provides an elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines. The elevation correction method is based on data of corona discharge characteristic of hardware fittings at simulated elevation in tests carried out in an ultra-high-voltage alternating-current test base environment and climate laboratory, and the correction method realizes exponential-form fitting, and can be applied to elevation correction calculation for design and optimal research for the high-elevation 330-kV alternating-current transmission lines. The elevation correction method has the advantages that calculation for elevation correction factors for the hardware fittings of the 330-kV alternating-current transmission lines in high-elevation areas is provided, equipment size and design basis meeting actual running requirements are provided, and simultaneously, fundamental data and reference for optimization and improvement operation of the hardware fittings are provided.

Description

technical field [0001] The invention relates to a method for correcting the corona inception voltage of metal fittings at an altitude, which belongs to the high-voltage technical field of transmission lines, and in particular to a corona discharge characteristic test of fittings under simulated altitude carried out in an environmental climate laboratory of an UHV AC test base, using an exponential form The fitting correction method can be used for correction calculation in the design and optimization research of high-altitude 330kV AC transmission lines. Background technique [0002] There are many factors that affect the initial corona voltage of high-voltage transmission line fittings, such as the shape of the electrode, its surface smoothness, and the degree of contamination. The above are internal factors. Before carrying out the corona test of fittings, these effects can be minimized by human factors . In addition, the corona discharge will be affected by the surroundi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 曹晶张勤谷莉莉谢梁代静
Owner STATE GRID ELECTRIC POWER RES INST
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