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Device and method for detecting arc current of high-voltage circuit breaker under simulated defects

A high-voltage circuit breaker, arc current technology, applied in the direction of circuit breaker testing, measuring devices, instruments, etc., to achieve the effect of ensuring breaking, easy disassembly and replacement, and ensuring the safety of personal equipment

Pending Publication Date: 2017-07-07
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] At present, there is no arc current detection device based on the simulated defect of the high-voltage circuit breaker in China, and the research on the rel

Method used

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  • Device and method for detecting arc current of high-voltage circuit breaker under simulated defects

Examples

Experimental program
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Example Embodiment

[0040] Example 1:

[0041] A specific embodiment of the present invention adopts figure 1 In the structure shown, the circuit breaker action control system 1 adopts a self-developed control system. The system adopts a delayer and a relay. The delay time of the delayer is preset, and the delay time resolution can reach 1ms. Generate relay signals to be transmitted to the action auxiliary contacts of the circuit breaker; the sample circuit breaker 2 adopts a commercially available circuit breaker. The components or materials for simulating defects are developed by ourselves, which can simulate various types of defects of the circuit breaker, such as the insulation drop of the arc extinguishing chamber, The opening speed of the mechanism is slow and the arc contact is severely burned; the auxiliary circuit breaker 3 adopts a commercial circuit breaker, and the auxiliary circuit breaker is switched from closing to opening to protect the test circuit breaker; the closing circuit break...

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Abstract

The invention discloses a device and method for detecting arc current under simulated defects of a high-voltage circuit breaker. A circuit breaker action control system that controls the circuit breaker and the closing circuit breaker; the circuit breaker of the test product is provided with defective components for simulating the defect of the high voltage circuit breaker. The circuit breaker action control system triggers the action of each circuit breaker to realize a complete opening process; the arc current signal during the opening process of the high-voltage circuit breaker is collected through the oscilloscope and the detection impedance. The invention can effectively simulate various defects that are likely to occur in the high-voltage circuit breaker body and mechanism during the operation process of the actual high-voltage circuit breaker, and detect the arc current during the opening process of the circuit breaker under the simulated defects.

Description

technical field [0001] The invention belongs to the field of fault detection of high-voltage circuit breakers, in particular to a device and method for detecting arc current under simulated defects of high-voltage circuit breakers. Background technique [0002] High-voltage circuit breakers are the most important control and protection equipment to ensure the safe and stable operation of the power grid. There are a large number of them in the power grid and their structures are extremely complex. During the long-term operation of high-voltage circuit breakers, affected by environmental factors or the aging factors of components themselves, various defects will appear in the body and mechanism. For example, the arc generated during the process of breaking the fault current may cause the contacts of the circuit breaker to burn out The arc chamber SF6 gas insulation performance decline, the circuit breaker opening speed is slow and other defects, and these defects may cause the...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 范敏黄海波毛文奇袁培黄福勇段肖力吴水锋李欣李婷由凯
Owner STATE GRID CORP OF CHINA
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