Method for predicting service life of transformer based on fiber grating temperature measurement system

A fiber grating and life prediction technology, applied in transformer testing, measuring electrical variables, instruments, etc., can solve problems such as large amount of information

Inactive Publication Date: 2013-10-23
TAIYUAN POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER +2
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  • Abstract
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Problems solved by technology

[0017] (a) Large amount of information

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  • Method for predicting service life of transformer based on fiber grating temperature measurement system

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Embodiment Construction

[0040] In order to better understand the present invention, the content of the present invention will be further clarified below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments. Those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms are also within the scope of the claims listed in this application.

[0041] Explanation of symbols in the drawings: 1-transformer body, 2-terminal PC, 3-wavelength demodulator, 4-fiber grating sensor, 5-broadband light source, 6-3dB coupler, 7-optical switch, 8-FP Filter, 9-photoelectric conversion module, 10-sawtooth wave generator, 11-fiber.

[0042] The present invention uses a fiber grating temperature measurement system to describe the internal temperature of the transformer in a quasi-distributed manner, to determine the hottest location inside the transformer, and to correct it according to "GB 1094.7-2008 Po...

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Abstract

The invention relates to a method for predicting the service life of a transformer based on a fiber grating temperature measurement system. The method comprises the following steps: performing quasi-distributed description on the internal temperature of the transformer by utilizing the fiber grating temperature measurement system; determining the position of a hottest point in the transformer; performing service life assessment on a local area in the transformer; and performing scientific and reasonable transformer service life prediction by combining the insulating properties of the transformer and the influence of the service life of the part on the overall service life of the transformer according to the service life loss of each position of the transformer. By the method disclosed by the invention, the loss of the insulation life in the transformer and the change rate of the insulation life can be calculated and assessed by utilizing the fiber grating temperature measurement system so as to guide an operation and maintenance department to improve the operation and maintenance strategy scientifically, safely and reliably.

Description

Technical field [0001] The invention belongs to the field of on-line monitoring of transformers in power transmission and transformation equipment. To be precise, it is a temperature measurement system using fiber grating to detect the actual temperature inside the transformer, and evaluate and predict the insulation life of the transformer according to the insulation characteristics of the transformer. Background technique [0002] The internal temperature of a power transformer is an important parameter to characterize the thermal characteristics of the transformer, and it is also a determining factor for the insulation life of the transformer. According to "GB 1094.7-2008 Power Transformer Part 7: Load Guidelines for Oil-immersed Power Transformers", the loss of transformer insulation life can be known It directly depends on the temperature of the hottest spot during the operation of the transformer and its duration. Due to the high voltage and strong electromagnetic field env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01K11/32G01K11/3206
CPCG01K11/3206G01K2003/145G01R31/62G01N25/72G01R31/1227
Inventor 张军六周国华熊莉娟高欣许强任建功王珊珊梁嗣元
Owner TAIYUAN POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER
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