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Method and system for detecting just-off point of circuit breaker based on opening pressure curve

A technology of pressure curve and detection method is applied in the field of detecting the just breaking point of the circuit breaker based on the opening pressure curve, which can solve the problems of inaccurate detection of the breaking point of the circuit breaker.

Active Publication Date: 2020-02-11
HENAN SENYUAN ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for detecting the just-off point of a circuit breaker based on the opening pressure curve, which is used to solve the problem of inaccurate detection of the just-off point of a circuit breaker due to data analysis simply based on a curve

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  • Method and system for detecting just-off point of circuit breaker based on opening pressure curve
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  • Method and system for detecting just-off point of circuit breaker based on opening pressure curve

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Embodiment Construction

[0039] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] figure 1 The status monitoring system for vacuum circuit breakers is shown, which can realize on-line or off-line monitoring. The system includes a circuit breaker, a vacuum circuit breaker online status monitoring device, a communication unit, a display unit, a storage unit, and an alarm unit. The circuit breaker includes a Hall sensor, a pressure sensor, a displacement sensor and a wireless temperature measurement module for collecting signals. The analog signal collected by the sensor is converted into a digital signal through the A / D conversion circuit, processed by the monitoring device, the collected data is displayed, stored and calculated, and the calculated characteristic value is compared with the stored historical data. An alarm will be issued if there is an abnormal value.

[0041] The basic method steps of this technica...

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Abstract

The invention relates to a breaker rigid opening point detecting method and system based on an opening pressure curve. The method comprises that 1) a pressure-time curve and a displacement-time curve in the opening process are obtained; 2) a minimum value of the pressure-time curve is calculated, and a moment tm corresponding to the position of the minimum value is recorded; and 3) the displacement-time curve is searched for a point Sm according to the corresponding moment tm, data {Sk-Sm} is processed, Sk serves as the initial value of the data, the speed corresponding to the data is calculated, and the position Sc where the speed is maximal serves as a practical rigid opening point. The method is scientific and effective, a calculation result is accurate, and the working state of a breaker can be monitored in real time.

Description

technical field [0001] The invention relates to the field of circuit breaker monitoring, in particular to a method and system for detecting the just-off point of a circuit breaker based on the opening pressure curve. Background technique [0002] The circuit breaker is the key equipment to realize the effective control of the power system. Once a failure occurs, it will bring serious consequences. In the past, there was a lot of blindness in the maintenance of the circuit breaker, and frequent disassembly may reduce the reliability of the circuit breaker. Effective use of the circuit breaker It is of great significance to protect the security and stability of the power grid. Therefore, keep abreast of the working status of the circuit breaker, find out the problematic parts early, improve the pertinence of maintenance, and avoid unnecessary power failure losses. The key to effective monitoring of mechanical characteristic parameters lies in the determination of the just-min...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 杨昭刘洋王卓马晓娟魏凯李金辉范冠鹏
Owner HENAN SENYUAN ELECTRIC CO LTD
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