SF6 breaker remaining life assessment method

A life assessment and circuit breaker technology, applied in the direction of instruments, data processing applications, calculations, etc., can solve problems such as single function and lack of methods for evaluating the remaining life of circuit breakers

Active Publication Date: 2014-04-09
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID +1
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Problems solved by technology

[0003] In recent years, there are relatively few studies on the remaining life of circuit breakers. The reason is that there are many random factors that affect the life of circuit breakers. Electrical wear, even the same product has different test results in different test stations
According to the current domestic and foreign SF 6 Research work on circuit breaker life assessment, although there are SF 6 There are certain relevant research results on circuit breaker life evaluation, but most of them belong to a single function or can only evaluate electrical life, lacking systematic and comprehensive SF 6 Estimation Method of Remaining Life of Circuit Breaker

Method used

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Embodiment Construction

[0017] The concrete steps of method of the present invention are as follows:

[0018] 1) Divide the circuit breaker state evaluation model into three levels, and pass the first-level life evaluation result HI 1 , secondary life assessment results HI 2 , Three-level life assessment results HI 3 Get the final health index HI of the circuit breaker, and further get the remaining life L and failure probability P.

[0019] 2) The calculation formula of the circuit breaker health index is introduced in the evaluation model, and the relationship between the health level of the circuit breaker life and the aging time can be expressed as:

[0020] HI 0 —Initial health index of equipment, HI—final health index of equipment, B—aging coefficient, T 1 — with brand new equipment HI 0 The corresponding year is generally the year when the equipment was put into operation, T 2 —The year corresponding to the HI to be calculated can be the current year or the future year.

[0021] 3) De...

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Abstract

The invention discloses an SF6 breaker remaining life assessment method and belongs to the technical field of breakers. The SF6 breaker remaining life assessment method comprises the steps of confirming the information amount for breaker remaining life assessment by analyzing factors influencing the breaker life assessment, dividing state quantities into basic parameters, operating parameters and defect management parameters according to established project models, using a analytic hierarchy process to confirm weight allocation of the state quantities, establishing a breaker three-layer parallel life assessment model based on a health index formula, and using the established formula to analyze and calculate the health level index, the remaining life and the fault probability of a breaker. The method is used for judging the life of a high-voltage breaker in an incomplete life test and is especially suitable for a product with a long life cycle. Possibility is provided for operation cost saving of a power system and improvement of operation safety of the power system.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers and relates to a SF 6 Circuit breaker residual life assessment method. Background technique [0002] Circuit breakers are extremely important equipment in the entire power system, and their safe operation is crucial. Due to many reasons such as circuit breaker design, manufacturing, material quality, and operation, equipment failures occur from time to time, which seriously affects the safety and stability of the power grid. run. Relevant statistics show that a large part of the maintenance cost of the substation is spent on the repair and routine maintenance of the circuit breaker. It is still a controversial issue as to which parts of the circuit breaker need to be replaced and how long they need to be replaced. In fact, in the current relatively conservative planned maintenance, it often happens that many parts still perform well when they are updated after many years of operation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
Inventor 张晗钱海王奇邓军常安宋云海李晋伟王有元周湶李剑杜林梁韵孙鹏鲍连伟
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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