Method for calculating running electrical equipment partial discharge quantity through SF6 decomposition product content

A technology of partial discharge and decomposition products, applied in the direction of testing dielectric strength, etc., can solve the problem of inability to measure partial discharge of electrical equipment

Active Publication Date: 2015-07-01
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a kind of SF according to the deficiencies in the prior art 6 The method of estimating the partial discharge of electrical equipme

Method used

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  • Method for calculating running electrical equipment partial discharge quantity through SF6 decomposition product content
  • Method for calculating running electrical equipment partial discharge quantity through SF6 decomposition product content
  • Method for calculating running electrical equipment partial discharge quantity through SF6 decomposition product content

Examples

Experimental program
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Effect test

Embodiment 1

[0081] A suspected faulty 220kV voltage level GIS main air chamber, the absolute pressure of the air chamber is 6MPa, and the volume of the air chamber is 100L. The PD electrification detects continuous PD signals, and the average discharge times per hour is obtained through continuous monitoring by the UHF PD detector. About 2×10 9 times, only SOF was detected in the detection of SF6 gas decomposition products 2 and SO 2 , obtained by continuous monitoring of SOF 2 and SO 2 The hourly increment is about 0.1μL / L, and the moisture detection does not exceed the standard.

[0082] According to the formula:

[0083] Q = E ip × Σ ( X ib - X ia ) + ...

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Abstract

The invention provides a method for calculating running electric equipment partial discharge quantity through SF6 decomposition product content. The method includes: S1, recording the content of decomposition products at the time of a; S2, recording the content of the decomposition products at the time of b; S3, recording total degree Nt of partial discharge occurring in the time of t; S4, calculating average discharge quantity Q of the partial discharge, occurring in the time of t, of equipment. Partial discharge level in the equipment is calculated through SF6 gas decomposition product content, the problem that the partial discharge quantity in the equipment cannot be quantitatively detected when the partial discharge occurs under the running condition of existing sulfur hexafluoride gas-insulated equipment is solved, and very important data support can be provided for the running state or fault degree evaluation of the sulfur hexafluoride gas-insulated equipment.

Description

technical field [0001] The invention belongs to a kind of SF in reckoning operation 6 The method of measuring the partial discharge in gas-insulated electrical equipment, especially involving the use of SF in the equipment for on-site live detection 6 The content of decomposition products is used to estimate the partial discharge in operating electrical equipment. Background technique [0002] Most of the common electrical fault characteristics of equipment are accompanied by partial discharge effect, which is caused by various defects inside the equipment that cause the electric field distortion inside the equipment, resulting in uneven distribution of electric field in some parts, resulting in partial discharge. Partial discharge is the main cause of insulation degradation. The current commonly used equipment fault diagnosis method is mainly to detect and monitor the partial discharge process inside the equipment. In general, the existence of insulation defects in some eq...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 蔡萱
Owner STATE GRID CORP OF CHINA
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