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Circuit breaker opening and closing time online monitoring device and method

A monitoring device, opening and closing technology, which is used in circuit breaker testing, measuring devices, instruments, etc., can solve the problems of failure to isolate fault sections, leapfrog tripping, and exceeding the performance of opening and closing time, so as to avoid malfunction or failure. Accurate and reliable effect of leapfrog tripping and monitoring time

Active Publication Date: 2021-12-03
MINGXING ELECTRIC SICHUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the opening time of the upper-level circuit breaker is shorter than the opening time of the lower-level circuit breaker, the upper-level circuit breaker in the faulty line will trip first than the lower-level circuit breaker, resulting in a leapfrog trip and failure to isolate the faulty section
[0004] 2. There is no way to consider whether the opening and closing time performance exceeds the standard during actual operation, so it is impossible to evaluate the service life of the circuit breaker

Method used

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  • Circuit breaker opening and closing time online monitoring device and method
  • Circuit breaker opening and closing time online monitoring device and method
  • Circuit breaker opening and closing time online monitoring device and method

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Effect test

Embodiment 1

[0059] Such as figure 1 As shown, the on-line real-time monitoring device for the opening and closing time of the switch on the pole of the high-voltage circuit breaker provided by the present invention includes a three-phase current sensor 1, a three-phase voltage sensor 2, an analog quantity acquisition unit 3, a signal processing and storage unit 4, a central Processing unit 5, state quantity acquisition unit 6, display unit 7, operation unit 8, communication unit 9, etc.; the three-phase current sensor 1 and three-phase voltage sensor 2 respectively transmit the current and voltage signals detected online to the analog Quantity acquisition unit 3; The analog quantity acquisition unit 3 respectively converts the current analog signal into a digital signal and transmits it to the signal processing and storage unit 4; The signal processing and storage unit 4 performs preprocessing and preprocessing on the input signal data Computing, and its signal is sent to central processi...

Embodiment 2

[0066] Such as figure 1 and figure 2 As shown, the on-line real-time monitoring device for the opening and closing time of the switch on the pole of the high-voltage circuit breaker provided by the present invention includes a three-phase current sensor 1, a three-phase voltage sensor 2, an analog quantity acquisition unit 3, a signal processing and storage unit 4, a central Processing unit 5, state quantity acquisition unit 6, display unit 7, operation unit 8, communication unit 9, etc.; the three-phase current sensor 1 and three-phase voltage sensor 2 respectively transmit the current and voltage signals detected online to the analog Quantity acquisition unit 3; The analog quantity acquisition unit 3 respectively converts the current analog signal into a digital signal and transmits it to the signal processing and storage unit 4; The signal processing and storage unit 4 performs preprocessing and preprocessing on the input signal data Operation, and its signal is sent to c...

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Abstract

The invention provides an on-line monitoring device and method for the opening and closing time of a circuit breaker. The device includes a three-phase current sensor, a three-phase voltage sensor, an analog quantity acquisition unit, a state quantity acquisition unit, a signal processing and storage unit, a central processing unit, a display unit, an operation unit, a communication unit; a three-phase current sensor and a three-phase The voltage sensors are respectively connected to the analog quantity acquisition unit, the analog quantity acquisition unit is connected to the signal processing and storage unit, the signal processing and storage unit is connected to the central processing unit, the state quantity acquisition unit, the display unit, the operation unit and the communication unit are connected to the central processing unit connect. The method can be monitored online by the above-mentioned monitoring device. The online monitoring device and method of the present invention can eliminate the influence of inrush current, power transmission, sudden large load, instantaneous single-phase ground fault and other circuit breaker opening and closing, and is not affected by low voltage, overvoltage and load size , The monitoring time is accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of power equipment testing, and relates to an on-line monitoring device and method for opening and closing time of a circuit breaker. Background technique [0002] As the operating voltage level of the power system continues to increase, the capacity and number of high-voltage circuit breakers continue to increase. Therefore, it is very important to judge its operating reliability. The opening and closing operation of the high-voltage circuit breaker is completed by the sequential movement of each component controlled by the operating mechanism, and determines whether it can successfully open and close the circuit. In addition to the key role of the operating mechanism, the opening and closing time of the circuit breaker is also an important indicator for considering the characteristics of the circuit breaker. The shorter the opening and closing time, the smaller the impact on the transmission and distributi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 杨波吴海涛刘东郑天龙黄媛
Owner MINGXING ELECTRIC SICHUAN
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