High altitude 35kV and below line insulator overvoltage characteristic determination method

A line insulation and determination method technology, applied in the direction of measuring electricity, measuring electrical variables, testing dielectric strength, etc., can solve problems such as increased difficulty of operation, difficulty in finding discharge curves, increased operating distance, etc., to improve safety and promote development Effect

Active Publication Date: 2018-09-21
云南电网有限责任公司输电分公司 +1
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Problems solved by technology

[0002] In terms of live work, domestic electric power supply enterprises or relevant research institutes have not conducted systematic tests on the impact of overvoltage on insulators in high-altitude areas of 35kV and below, and have not found the safety margin required for operations using relevant test data and risk rate calculation analysis, as well as the safety technical requirements required for carrying out 35kV and below live line work in high altitude areas
Only the conventional altitude correction coefficient is used to directly correct the numbe

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  • High altitude 35kV and below line insulator overvoltage characteristic determination method
  • High altitude 35kV and below line insulator overvoltage characteristic determination method
  • High altitude 35kV and below line insulator overvoltage characteristic determination method

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[0026] The present invention provides a method for determining the overvoltage characteristics of 35kV and below line insulators in high altitude areas. The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0027] The experimental research of the present invention was carried out at the test sites of Kunming, Diqing, and Kunming Electrical Apparatus Research Institute. The average altitudes of Kunming and Diqing are 1900m and 3200m, respectively. The simulated climate room of Kunming Electrical Apparatus Research Institute can simulate 1900m to 4000m. The altitude. Through the comparative test of the flashover characteristics of 35...

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Abstract

The invention belongs to the technical field of live operation maintenance, and particularly relates to a high altitude 35kV and below line insulator overvoltage characteristic determination method comprising the following steps that (1) the altitude condition is determined; (2) the test equipment is determined; (3) the insulator overvoltage test is performed; (4) the breakdown discharge characteristic is determined; and (5) safety margin and risk analysis is performed. The 35kV and below line insulator overvoltage test is performed in the high altitude region to determine the insulator overvoltage discharge characteristic. When live operation is performed in the high altitude region, the key parameter of the number of the 35kV and below line live operation insulators of the high altituderegion is finally determined by searching the discharge curve, the number of good insulators required for live operation is determined, the problem of error in comparison with the actual condition canbe solved, the basis can be provided for the safety of 35kV and below line live operation in the high altitude region, and the method plays an active role for promoting the development of 35kV and below line live operation in the high altitude region.

Description

technical field [0001] The invention belongs to the technical field of live work maintenance, and in particular relates to a method for determining the overvoltage characteristics of line insulators at high altitudes of 35kV and below. Background technique [0002] In terms of live work, domestic electric power supply enterprises or relevant research institutes have not conducted systematic tests on the impact of overvoltage on insulators in high-altitude areas of 35kV and below, and have not found the safety margin required for operations using relevant test data and risk rate calculation and analysis, as well as the safety technical requirements for carrying out 35kV and below live line work in high altitude areas. Only the conventional altitude correction coefficient is used to directly correct the number of insulators required for live work, without first correcting the corresponding voltage, and then checking the discharge curve to obtain the corresponding number of ins...

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1245
Inventor 肖庆初庞峰杨亮龚明义郑瑞东李志林吝明强蔡澍雨宋琪
Owner 云南电网有限责任公司输电分公司
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