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Transformer performance evaluation method

A transformer and performance technology, applied in the field of transformer performance evaluation, can solve the problems of lack of objective theoretical basis and unconvincing results.

Active Publication Date: 2019-11-26
XIAN UNIV OF TECH
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Problems solved by technology

[0004] However, there are also shortcomings in AHP. AHP analyzes problems based on the subjective factors of decision makers, lacks objective theoretical basis, and makes the results unconvincing.

Method used

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Embodiment

[0138] In order to verify the practicability and accuracy of the present invention, take a 110kV main transformer of a certain substation in Tianjin as an example. The transformer model is SFSZ7-50000 / 110. In a preventive test, the main body, bushing and iron core The relevant indexes and their measured values ​​are given in Table 5.

[0139] Table 5 Measured value of transformer body index

[0140] index Measurements index Measurements Insulation resistance (MΩ)1180 Acetylene (μL / L)1.30 Absorption ratio1.32 Total hydrocarbons (μL / L)18.60 Polarization index1.3 CO(μL / L)294.60 Cardboard polymerization degree960 Relative CO gas production rate (mL / d)23.073 Winding dielectric loss (%)0.31CO 2 (μL / L)

901.4 Hydrogen (μL / L)54.51CO 2 Relative gas production rate (mL / d)

25.43 Methane (μL / L)13.80 Water content in oil (mg / L)15.6 Ethane (μL / L)1.30 Oil dielectric loss (%)0.65 Ethylene (μL / L)2.20 Oil breakdown voltage (kV)40 Insulation resistance of last screen (MΩ)2300 Acetylene...

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Abstract

The invention discloses a transformer performance evaluation method, and solves the problem that subjective factors are taken as a basis to analyze problems and an objective theoretical basis is lacked in the prior art. Firstly, a transformer performance evaluation key index system is constructed, then weights of indexes are obtained through an analytic hierarchy process, finally, a quantitative correction scoring function is introduced to obtain scores of all the indexes and the overall performance of the transformer, the fault condition is analyzed according to the scores, the performance level of the transformer is divided, and the maintenance level is recommended. According to the transformer performance evaluation method, all parts and parameter sources of the transformer are comprehensively considered, the transformer performance scoring function is reasonably given, certain practicability is achieved, and the technical problems that in a transformer performance evaluation system, the number of indexes is large, and the indexes are connected and influenced mutually are solved.

Description

Technical field [0001] The invention belongs to the technical field of performance failure evaluation, and specifically relates to a transformer performance evaluation method. Background technique [0002] Transformers are the core electrical equipment for power transmission in the power grid. With the development of the power grid, the performance requirements of transformers are getting higher and higher. For the safe and stable operation of the power grid, it is very necessary to perform transformer performance evaluation. With the development of transformer monitoring technology, there are many measured indexes that characterize the performance of transformers, and there is a relationship between indexes and between indexes and performance, which makes the performance evaluation index system very complicated. How to correctly analyze and process the obtained data and apply it to the transformer performance evaluation method is a hot issue currently studied. [0003] At presen...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06G01R31/02
CPCG06Q10/0639G06Q50/06
Inventor 党建魏慧贾嵘
Owner XIAN UNIV OF TECH
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