Contact ablation degree judgment method based on circuit breaker radiation electromagnetic wave signal detection

A technology of electromagnetic wave signal and determination method, which is applied in the direction of using microwave flaw detection, etc., can solve problems such as complex detection methods, difficult power outages, failure to meet the requirements of power system safety, stability, and economic development, and achieve the effect of rapid diagnosis

Inactive Publication Date: 2020-07-31
STATE GRID CORP OF CHINA +1
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Problems solved by technology

Existing detection and diagnosis methods are unable to meet the requirements of safe, stable and economical development of the power system in terms

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  • Contact ablation degree judgment method based on circuit breaker radiation electromagnetic wave signal detection

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Embodiment Construction

[0010] see figure 1 , a method for judging the degree of contact ablation based on the detection of the radiated electromagnetic wave signal of the circuit breaker, which is to receive the radiated electromagnetic wave generated during the opening process of the circuit breaker through the antenna, and use an ordinary oscilloscope to monitor the waveform, and analyze the individual electromagnetic wave pulses per unit time The number of pulses is used to determine the degree of ablation of the circuit breaker contacts; if a large number of pulses is found, it can be determined that the ablation of the contacts is serious.

[0011] The acquisition of radiated electromagnetic waves is mainly done through antenna reception, and then the number of pulses of its waveform is analyzed on an ordinary oscilloscope. See figure 1 , which shows the schematic diagram of radiated electromagnetic waves in three ablation situations of circuit breaker contacts. in, figure 1 (a), (b), and (c...

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Abstract

The invention discloses a contact ablation degree judgment method based on circuit breaker radiation electromagnetic wave signal detection. The method achieves the quick diagnosis of the ablation degree of a circuit breaker contact through employing the means of electrical measurement and waveform observation. Radiation electromagnetic waves generated in the opening process of the circuit breakerare received through an antenna, waveform monitoring is conducted through a common oscilloscope, the number of electromagnetic wave pulses in unit time is analyzed, and thus the ablation degree of thecontact of the circuit breaker is judged. If the number of pulses is large, it can be judged that the contact is ablated seriously. According to the method, the ablation degree of the contact of thecircuit breaker is quickly judged mainly through an electrical detection means, and the method has the remarkable advantages of intuition, conciseness, quickness, high efficiency and the like.

Description

technical field [0001] The invention belongs to the field of defect detection of electrical equipment in a power system, in particular to a method for judging the ablation degree of contacts based on the detection of circuit breaker radiation electromagnetic wave signals. It is suitable for detecting internal defects of circuit breakers. Background technique [0002] In the prior art, the circuit breaker is mainly used in the power system to automatically cut off the circuit when serious overload, short circuit, undervoltage and other faults occur, so as to control the stability of the power system voltage. Under long-term working conditions, the contacts of the circuit breaker will be ablated due to the high temperature and high pressure environment during the opening process, and the ablated contacts will affect the opening performance of the circuit breaker, resulting in inflexible operation, Faults such as failure to open the gate seriously threaten the safety and stabl...

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Application Information

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IPC IPC(8): G01N22/02
CPCG01N22/02
Inventor 满晓平刘楠苏新刘帅杨立伟赵炳然蒋进王楚桥
Owner STATE GRID CORP OF CHINA
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