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A Method for Optimizing the Interrupting Performance of Low-Voltage Circuit Breakers Based on Grid Voltage Test

A low-voltage circuit breaker, voltage testing technology, applied in multi-objective optimization, design optimization/simulation, special data processing applications, etc., can solve problems such as high cost, blindness, low efficiency, etc. low cost effect

Active Publication Date: 2022-06-21
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the blindness, low efficiency, high cost and other problems of traditional methods based on engineering experience and experimental verification, the present invention proposes a method for optimizing the breaking performance of low-voltage circuit breakers based on grid voltage testing, so as to reduce the research and development costs of circuit breakers, shorten R & D cycle, improve switch performance

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  • A Method for Optimizing the Interrupting Performance of Low-Voltage Circuit Breakers Based on Grid Voltage Test
  • A Method for Optimizing the Interrupting Performance of Low-Voltage Circuit Breakers Based on Grid Voltage Test

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Embodiment 1

[0041] The basic flow chart of the method for optimizing the breaking performance of low-voltage circuit breakers based on grid voltage testing in this embodiment is as follows figure 1 shown, including the following steps:

[0042] Step 1, experimentally measure the data of arc voltage, grid voltage and arc current in the process of opening and closing the arc of the low-voltage circuit breaker;

[0043] attached figure 2 The arc voltage and grid voltage waveform measured by the circuit breaker prototype under the expected short-circuit current RMS value of 10kA in the embodiment, the circuit breaker prototype has a total of 12 grid plates, and the grid plate serial numbers are from bottom to top. Sorting, the closest to the static contact is the 1st piece, the farthest is the 12th piece, the serial number in the figure corresponds to the grid piece serial number.

[0044] Step 2: Evaluate the spatiotemporal distribution of the arc in the arc extinguishing chamber during t...

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Abstract

The invention relates to a method for optimizing the breaking performance of a low-voltage circuit breaker based on the grid voltage test. By analyzing the time and space characteristics of the arc in the arc extinguishing chamber during the breaking process of the circuit breaker, and the arc burning of the entire arc extinguishing chamber and each grid area , Current zero-crossing, analysis of energy dissipation and dielectric recovery characteristics in the after-arc stage, determine the weak area and improvement direction of the arc extinguishing chamber design, with strong pertinence, low cost, and high efficiency, and can accurately evaluate the weak area of ​​the arc extinguishing chamber, It can be used to guide the design and optimization of the arc extinguishing system of low-voltage circuit breakers.

Description

technical field [0001] The invention relates to a method for optimizing the breaking performance of a low-voltage circuit breaker, in particular to a method for optimizing the breaking performance of a low-voltage circuit breaker based on grid voltage testing. Background technique [0002] At present, most low-voltage circuit breakers use metal grid arc extinguishing technology. For the near-pole voltage drop, quickly increase and maintain the arc voltage, and complete the current limiting and breaking tasks. It is of great significance to grasp the dynamic process of the metal grid cutting arc, and combine this process to optimize the design or development of circuit breakers. However, the physical process of metal grid cutting arc is very complex, and it is difficult to quantitatively and directly obtain the effect and dynamic performance of grid cutting arc by using high-speed camera, fiber array and other testing technologies in the past. [0003] The optimization desi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F2111/06G06F30/20
Inventor 赵虎李兴文
Owner NORTHWESTERN POLYTECHNICAL UNIV