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Hexafluoride sulphur circuit breaker on-line monitoring instrument

A sulfur hexafluoride and circuit breaker technology, applied in the field of sulfur hexafluoride circuit breaker on-line monitoring instrument, can solve the problems of labor, economic losses of substations, and increase maintenance costs, so as to improve work efficiency and safety, and improve maintenance targets. the effect of reducing the incidence of failures

Inactive Publication Date: 2008-09-17
王世有
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Failure to know the working status of the high-voltage circuit breaker in time may cause a failure before the maintenance time, which affects the normal operation of the current transformer, brings economic losses to the substation, and lacks safety guarantees;
[0004] 2. After a failure occurs, the defective parts cannot be found in time to achieve "targeted" maintenance. Instead, it needs to be completely disassembled for overhaul, which is not only time-consuming and laborious, but also increases the maintenance cost. At the same time, disassembly and reassembly will bring many new problems. Defects;
[0005] 3. Power outage maintenance is required. For a high-voltage circuit breaker that is completely normal (without potential failure), it not only reduces its work efficiency but also wastes maintenance costs;
[0006] 4. The number of high-voltage circuit breakers is large, the amount of maintenance is large, and the cost is high. More than 50% of the maintenance cost of the substation is used for the maintenance of high-voltage circuit breakers

Method used

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  • Hexafluoride sulphur circuit breaker on-line monitoring instrument
  • Hexafluoride sulphur circuit breaker on-line monitoring instrument
  • Hexafluoride sulphur circuit breaker on-line monitoring instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0038] On the basis of Embodiment 1, a pressure sensor is added, and the pressure sensor is connected to the single-chip microcomputer IC through the signal processing circuit B.

[0039] While monitoring the vibration frequency, the pressure sensor converts the monitored closing spring pressure value into an electrical signal, which is amplified and band-pass filtered by the signal processing circuit B. By comparing with the standard data stored in the computer, the spring compression is judged. status, if any abnormal situation is found, report to the police in time.

Embodiment 3

[0041] On the basis of Embodiment 2, a compensation type current sensor is added, and the compensation type current sensor is connected to the single-chip microcomputer IC through the signal processing circuit C.

[0042] While measuring the vibration frequency and the pressure value of the closing spring, the compensation current sensor monitors the closing and opening coil current of the circuit breaker. High-voltage circuit breakers generally use a DC electromagnet as the first-level control element to operate. When the current passes through the electromagnet coil, a magnetic flux is generated inside the electromagnet, and the moving iron core is attracted by the magnetic force to open or close the circuit breaker. The compensated current sensor monitors the current signal, and the obtained current signal is amplified and band-pass filtered by the signal processing circuit C, and the fault symptom is judged by storing the standard time interval of opening or closing in the ...

Embodiment 4

[0044] On the basis of Embodiment 3, an ultrasonic sensor is added, and the ultrasonic sensor is connected to the single-chip IC through the signal processing circuit D.

[0045] The ultrasonic sensor can detect whether the electric spark is generated when the contact of the circuit breaker is closed. When the electric spark is generated when the contact is closed, the ultrasonic sensor can convert the detected ultrasonic wave into an electrical signal, which is amplified and band-passed by the signal processing circuit D. Processing such as filtering and transmission to the single-chip IC, when the standard value stored in the single-chip IC is exceeded, an alarm is realized.

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Abstract

The invention discloses an on-line monitoring device of the sulphur hexafluoride circuit breaker for knowing the operating state of the breaker and the rejected region in time, reducing the fault incidence rate, increasing the work efficiency of the breaker and safety, increasing the repair pertinence and reducing the maintenance cost. The monitoring device is provided with a vibration frequency sensor and the vibration frequency sensor is connected with a singlechip microcomputer IC by a signal processing circuit A and a display circuit and an alarm circuit are connected with the singlechip microcomputer IC.

Description

Technical field: [0001] The invention relates to a tester for a sulfur hexafluoride circuit breaker, in particular to a tester that can know the working state and defective parts of the circuit breaker in time, reduce the failure rate, improve the working efficiency and safety of the circuit breaker, and improve the pertinence of maintenance And online monitors for sulfur hexafluoride circuit breakers that reduce maintenance costs. Background technique: [0002] Sulfur hexafluoride circuit breakers have been widely used in the power industry and are necessary high-voltage breaking products for large substations. The structure of the existing sulfur hexafluoride circuit breaker is that there is an insulating and sealed casing. In the insulating and sealing casing, there are upper insulating rods and lower insulating rods connected to the terminals of the current transformer. The front ends of the upper insulating rods and the lower insulating rods are respectively Equipped w...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 王世有
Owner 王世有
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