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Current and short-term reliability assessment method of high-voltage transformer

A high-voltage transformer and reliability technology, applied in the direction of instruments, data processing applications, information technology support systems, etc., can solve the problems of human factors interfering with too many equipment maintenance tasks and personnel

Inactive Publication Date: 2013-07-24
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
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Problems solved by technology

Especially for domestic power grid enterprises, the power grid is developing rapidly, and it is necessary to pursue an efficient equipment management model to ensure the safety of power grid production, and to solve the increasingly prominent contradictions between excessive human intervention and equipment maintenance tasks and personnel in the equipment management process

Method used

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  • Current and short-term reliability assessment method of high-voltage transformer
  • Current and short-term reliability assessment method of high-voltage transformer
  • Current and short-term reliability assessment method of high-voltage transformer

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Embodiment Construction

[0026] See figure 1 , figure 2 , table 1, a kind of current and short-term reliability evaluation method of high voltage transformer, the feature of the present invention is, its method step is:

[0027] (1) Build a transformer fault tree

[0028] Divide the power transformer into nine major systems, namely body, winding, iron core, on-load tap-changer, non-electrical protection, cooling system, bushing, oil conservator and off-excitation tap-changer; Body failure A1, winding failure A2, iron core failure A3, on-load tap-changer failure A4, non-power protection failure A5, cooling system failure A6, bushing failure A7, oil conservator A8, off-excitation tap-changer failure A9 class; where T is the top event of the fault tree, Aj where j=1,2,,9, Ek where k=4.1,4.2,...,6.5 is the middle event of the fault tree, and Xi where i=1.1,1.2 ,...,9.7 is the bottom event of the fault tree; apply the principle of fault tree to subdivide various faults and establish a fault tree accord...

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Abstract

The invention provides a current and short-term reliability assessment method of a high-voltage transformer. According to the method, precise and quantized assessment is carried out on the current and short-term reliability of the high-voltage transformer by means of a fault tree and a fault mode assessment model through data obtained through all detection means of a current transformer, wherein the data include routine tour, special tour and preventive test data, diagnosis test data, foundation standing book information of equipment, past-year equipment defect and fault records and other data. After assessment, a mode that each maintainable component of the transformer can possibly have a fault and the fault generation probability can be obtained, and maintenance measures to reduce or prevent the fault mode can be formulated under guidance according to the correspondent relationship between the fault mode and inspection methods. A development trend of the short-term reliability can be predicted through an aging model of the equipment. The method can assess reliability of the high-voltage transformer, and has the advantages of being concise, easy to understand, precise, visual, quantized and the like.

Description

technical field [0001] The invention belongs to the category of state evaluation of electrical equipment, and is suitable for current and short-term state evaluation of equipment of 500kV, 220kV and 110kV high-voltage transformers. Background technique [0002] Modern grid electrical equipment has greater complexity and stronger system, so better ideas are needed to realize the modern management of electrical equipment. Especially for domestic power grid enterprises, the power grid is developing rapidly, and it is necessary to pursue an efficient equipment management model to ensure the safety of power grid production, and to solve the increasingly prominent contradictions between excessive human intervention and equipment maintenance tasks and personnel in the equipment management process . Therefore, it is necessary to establish a repair and maintenance strategy for electrical equipment based on equipment status and reliability, clarify the weak points of electrical equip...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
CPCY04S10/54Y04S10/50
Inventor 黄绪勇孙鹏姜虹云于虹赵现平
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST
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