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Intermediate relay coil soft fault detection method

An intermediate relay and detection method technology, which is applied in circuit breaker testing, instruments, measuring devices, etc., can solve the problems of ineffective detection of soft faults and complex detection methods of relay coils, and achieve the effect of large use value and improved accuracy

Active Publication Date: 2020-04-03
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems that existing relay coil detection methods are complex and cannot effectively detect soft faults, the present invention provides a method for detecting soft faults of intermediate relay coils

Method used

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  • Intermediate relay coil soft fault detection method
  • Intermediate relay coil soft fault detection method
  • Intermediate relay coil soft fault detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] The following will take the MY 2NJ intermediate relay with a rated voltage of 12V as an example to illustrate the actual fault detection process and the effectiveness of the detection.

[0045] Restricted by the conditions, six MY 2NJ intermediate relays with a rated voltage of 12V were used to construct an initial control sample. The sample frequencies obtained by direct measurement were grouped into one group, and the frequencies collected after man-made soft faults were grouped into two groups. The results are as follows Table 1 shows.

[0046] Table 1 Initial control sample data (unit / MHz)

[0047]

[0048] The data in Table 1 is divided into two categories using a unique clustering method for cluster analysis, and the results are as follows: figure 2 As shown, 1.1 to 1.6 are 6 intermediate relays in the normal group, and 2.1 to 2.6 are 6 intermediate relays with soft faults.

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Abstract

The invention discloses an intermediate relay coil soft fault detection method, solves the problems that an existing relay coil detection method is complex and cannot effectively detect soft faults, and belongs to the field of relay fault detection. The method comprises the steps that S1, two groups of data samples which comprises a group A and a group B are established, the group A is a normal scattering parameter of an intermediate relay coil, and the group B is a scattering parameter obtained after a soft fault of the intermediate relay coil occurs; S2, acquiring scattering parameters of anintermediate relay coil to be measured, S2, respectively adding the scattering parameters into the group A and the group B established in the step S1, clustering, if the scattering parameters of theintermediate relay to be tested are the same as those of the group A, determining that the intermediate relay to be tested is normal, if the scattering parameters of the intermediate relay to be tested are the same as those of the group B, determining that the intermediate relay to be tested has a soft fault; wherein the scattering parameter comprises a frequency corresponding to a phase angle ofzero in the phase-frequency characteristic.

Description

technical field [0001] The invention relates to a method for soft faults of relays, in particular to a method for detecting soft faults of intermediate relay coils. Background technique [0002] With the advancement of social science and technology and the development of social productivity, the electrification of society is further improved, and social production and life are increasingly inseparable from electrical equipment. Intermediate relays are widely used in relay protection and automatic control systems due to their good electrical characteristics. , transfer intermediate signals in the control circuit, and increase the number and capacity of contacts. Therefore, the safety of the intermediate relay will be related to the safety of the entire electrical equipment and even the entire electrical system. The safety of the intermediate relay is very important. Every year, the failure of the electrical equipment caused by the failure of the intermediate relay will cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R31/12G01R27/28G06K9/62
CPCG01R31/327G01R31/12G01R27/28G06F18/2321Y04S10/52
Inventor 张刚何鑫景海涛吕超张临志朱瑞环
Owner HARBIN INST OF TECH
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