Calculation method for positioning flashover path of multi-cavity structure

A technology of structural positioning and calculation method, applied in the field of electric power, can solve the problems of inability to set air gaps more reasonably, lack of judgment basis, etc., and achieve the effect of good application prospects, reduction of line faults, and wide application significance.

Active Publication Date: 2021-10-22
云南电网有限责任公司德宏供电局 +1
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Problems solved by technology

[0004] However, at present, the equivalent calculation of the multi-chamber arc extinguishing device and the external series air gap has not yet been carried out. There is a lack of certain basis for judgment, and the length of the air gap cannot be set more reasonably to protect the insulator from arc burns and damage. fast quenching arc

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  • Calculation method for positioning flashover path of multi-cavity structure
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  • Calculation method for positioning flashover path of multi-cavity structure

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[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] The present invention provides a calculation method for positioning a flashover path with a multi-chamber structure. The method is based on a test platform. The test platform includes: an impulse current generator 1, a voltage divider 3, a Rogowski coil 4, an oscilloscope 5, and a camera Apparatus 6, computer 7 and test sample 8 of multi-chamber structure.

[0033] Such as figure 1 As shown, the negative electrode of the impulse current ...

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Abstract

The invention discloses a calculation method for calculating a positioning flashover path of a multi-cavity structure. The calculation method for positioning the flashover path of the multi-cavity structure comprises the following steps: acquiring an equivalent air gap distance according to a breakdown voltage in combination with a relation curve of a rod-rod electrode U50% and a gap distance; according to the number of the cavities and the equivalent air gap distance, performing data fitting and drawing a fitting curve; and according to the established fitting curve, fitting a relation formula between the number of the cavities and the air gap distance. According to the invention, the external series air gap distance can be set, the flashover path can be positioned, and the installation of the multi-cavity structure and the external series air gap can be guided. Thus, the flashover path is restrained in the cavity, the insulator string is prevented from flashover to damage the insulator, safe and reliable operation of the line is guaranteed, and the device has important significance in practical application.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a calculation method for locating a flashover path in a multi-chamber structure. Background technique [0002] As my country's demand for electric energy continues to increase, more stringent requirements are put forward for the safety and stability of the line, and frequent lightning activities often pose a serious threat to the safety of the line. Distribution lines are more prone to flashover due to low lightning withstand level and insulation level. General induced lightning overvoltage and direct lightning overvoltage may cause flashover of insulators, resulting in power supply interruption or short circuit, which seriously threatens the safety of power grid operation. [0003] The main component of the multi-chamber arc extinguishing device is a multi-chamber system, which consists of a considerable number of steel ball electrodes covered by insulating materials suc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/12Y02E60/00
Inventor 浦仕遵李宏梅彭庆军刘平林陈永梅杨建伟陈朝毅范庆前陶乃泽刘招帅
Owner 云南电网有限责任公司德宏供电局
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