On-line monitoring device and method for opening and closing time of circuit breaker

A monitoring device, opening and closing technology, which is applied in the direction of circuit breaker testing, measuring devices, instruments, etc., can solve problems such as failure to isolate faulty sections, leapfrog tripping, and excessive opening and closing time performance, so as to avoid malfunction or The effect of leapfrog tripping and monitoring time is accurate and reliable

Active Publication Date: 2020-06-05
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 leapfr

Method used

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  • On-line monitoring device and method for opening and closing time of circuit breaker
  • On-line monitoring device and method for opening and closing time of circuit breaker
  • On-line monitoring device and method for opening and closing time of circuit breaker

Examples

Experimental program
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Example Embodiment

[0058] Example 1

[0059] Such as figure 1 As shown, the on-line real-time monitoring device for the opening and closing time of the high-voltage circuit breaker pole switch 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, and a central The processing unit 5, the state quantity acquisition unit 6, the display unit 7, the operation unit 8, and the communication unit 9, etc.; the three-phase current sensor 1 and the 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 preprocesses and preprocesses the input signal data Calculate and send its signal to...

Example Embodiment

[0065] Example 2

[0066] Such as figure 1 with figure 2 As shown, the on-line real-time monitoring device for the opening and closing time of the high-voltage circuit breaker pole switch 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, and a central The processing unit 5, the state quantity acquisition unit 6, the display unit 7, the operation unit 8, and the communication unit 9, etc.; the three-phase current sensor 1 and the 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 preprocesses and preprocesses the input signal data And send the sign...

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PUM

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Abstract

The invention provides an on-line monitoring device and method for opening and closing time of a circuit breaker. The device comprises 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 and a communication unit. The three-phase current sensor and the three-phase voltage sensor are connected with the analog quantity acquisition unit, the analog quantity acquisition unit is connected with the signal processing and storage unit, the signal processing and storage unit is connected with the central processing unit, and the state quantity acquisition unit, the display unit, the operation unit and the communication unitare connected with the central processing unit. According to the invention, online monitoring can be carried out through the monitoring device; the influence of inrush current, power transmission, abrupt change of large load, instantaneous single-phase earth faults, opening and closing of other circuit breakers and the like can be eliminated, meanwhile, the on-line monitoring device and method are not influenced by low voltage, overvoltage and load, and 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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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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