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Method for comprehensively evaluating electrical life of circuit breaker

A comprehensive evaluation, circuit breaker technology, applied in instrumentation, electrical digital data processing, design optimization/simulation, etc., to save time and cost, shorten time to market, and improve engineering practicability and operability

Pending Publication Date: 2022-06-14
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for comprehensively evaluating the electrical life of a circuit breaker, which solves the problem of how to improve the accuracy of electrical life evaluation while saving costs in evaluating the electrical life parameters of circuit breaker products

Method used

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  • Method for comprehensively evaluating electrical life of circuit breaker
  • Method for comprehensively evaluating electrical life of circuit breaker
  • Method for comprehensively evaluating electrical life of circuit breaker

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Embodiment

[0038] The present invention is a method of comprehensively evaluating the electrical life of the circuit breaker, for a DC molded case circuit breaker product, an arc magnetic fluid simulation model of the circuit breaker is established, and the arc temperature distribution is calculated, such as Figure 3 As shown, the arc voltage and arc current curves are as follows Figure 4 and Figure 5 as shown. According to this arc voltage and arc current curve, combined with the contact ablation calculation model to obtain the electrical life of this circuit breaker is 2000 times, according to the experimental results of 2006 times, the results are basically consistent, but also verified the correctness and effectiveness of the method of comprehensive evaluation of the electrical life of the circuit breaker of the present invention.

[0039] The method of comprehensive evaluation of the electrical life of the circuit breaker of the present invention, theoretically not only evaluates the el...

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Abstract

The invention discloses a method for comprehensively evaluating the electrical life of a circuit breaker, and the method specifically comprises the following steps: 1, building a magnetohydrodynamic simulation model according to a designed arc extinguish chamber structure of the circuit breaker; 2, obtaining time-space evolution characteristics, arc current, arc voltage and allowable energy of the arc under different voltages and different currents through simulation calculation, and establishing a database of simulation results of the circuit breaker; and step 3, calculating the electrical life of a new circuit breaker product: calculating the residual electrical life of the circuit breaker in on-line operation. Therefore, comprehensive evaluation of the electrical life of different circuit breakers is realized. According to the method, the electrical life parameter of a new circuit breaker product is evaluated theoretically, the number of residual electrical life times can be evaluated according to the real-time state of the circuit breaker, and the accuracy of electrical life evaluation is improved while the cost is saved. The method can be applied to a low-voltage circuit breaker and can also be applied to a high-voltage gas circuit breaker.

Description

Technical field [0001] The present invention belongs to the field of gas circuit breaker arc extinguishing and arc electrical contact technology, specifically relates to a method of comprehensively evaluating the electrical life of the circuit breaker. Background [0002] Environmental pollution has become an urgent problem to be solved in the world, and it is an important measure to strictly control carbon emissions and achieve power generation based on clean energy. It proposes to build a new power system with new energy as the main body, which pushes the application of new energy to a new level. At the same time, it has brought development opportunities and challenges to the development of wind power generation, photovoltaic power generation and energy storage. In the construction of a new power system, the development of the distribution network has also become an important part, especially the distributed photovoltaic can be directly connected to the distribution network, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14
Inventor 尹健宁郎霄剑汪倩段建东李兴文
Owner XIAN UNIV OF TECH
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