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A method for determining the seismic reliability of electrical equipment made of electrical ceramic materials

A technology for electrical equipment and determination methods, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as weak seismic fortification capabilities of power facilities, inability to evaluate equipment safety, and inability to ensure seismic capability requirements, etc., to achieve Good practicality and economical effect

Active Publication Date: 2015-09-02
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The theoretical basis of the allowable stress method and the safety factor method is that the strength of porcelain materials obeys the normal distribution, but no specific explanation or explanation is given, which makes the seismic calculation method have great uncertainty and blindness, and cannot ensure the seismic resistance that meets the fortification standards. Capability requirements, and it is impossible to evaluate the safety of equipment under different ground motion responses
The earthquake damage to power facilities in Wenchuan and Ya'an earthquakes shows that the anti-seismic fortification capabilities of various power facilities in my country are still relatively weak

Method used

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  • A method for determining the seismic reliability of electrical equipment made of electrical ceramic materials
  • A method for determining the seismic reliability of electrical equipment made of electrical ceramic materials
  • A method for determining the seismic reliability of electrical equipment made of electrical ceramic materials

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Embodiment 1

[0052] Such as figure 1 Shown, the inventive method of this example comprises the following steps:

[0053] (1) Determine the distribution function of the bending strength of the electric porcelain material;

[0054] The bending strength x distribution function of the electric porcelain material is:

[0055] F ( x ) = 1 - exp [ - x θ ] m - - - ( 1 )

[0056] Wherein, F(x) is the cumulative probability of failure, m is the Weibull coefficient of Weber, the larger the value, the better the uniformity and reliability of the electric porcelain material, and θ is the scale factor, which is the strength value when the failure probability is 0.6321;

[0057] Since the elec...

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Abstract

The invention relates to an electric ceramic material electrical device seismic reliability determining method. The method includes the steps of determining the distribution function of the bending strength of an electric ceramic material; correcting the distribution function of the bending strength of the electric ceramic material; determining the seismic capacity of an electrical device; determining the reliability of the electrical device; drawing a vulnerability curve chart of the electrical device. Compared with a traditional electrical device seismic reliability calculation method, the electric ceramic material electrical device seismic reliability determining method is more practical, more reasonable and capable of providing technical support for relief work, such as disaster prediction, damage assessment and contingency plan developing.

Description

Technical field: [0001] The invention relates to a method for determining the reliability, and more particularly relates to a method for determining the anti-seismic reliability of electrical equipment made of electric porcelain materials. Background technique: [0002] Due to the structure and electrical performance requirements of electrical equipment, porcelain materials are widely used. The electrical equipment of pillar porcelain materials in the substation mainly includes lightning arresters, transformers, circuit breakers, pillar insulators, disconnectors, etc. This type of equipment has a high center of gravity, natural frequency distribution within 1-10Hz, and small damping ratio, which is prone to resonance-like phenomena in earthquakes and causes large inertial forces; in addition, the key structure of this type of equipment is the electric porcelain sleeve. It is a brittle material with low strength, poor deformation and energy storage capacity, and is prone to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 刘振林代泽兵卢智成
Owner STATE GRID CORP OF CHINA
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