Device and method for detecting on-off reliability of contact of direct current contactor of direct current system

A DC contactor and DC system technology, applied in the direction of circuit breaker testing, etc., can solve the problems of affecting the dielectric properties of the contact system, numerous testing steps, and high labor costs, and achieve low production costs, reduced cumbersomeness, and system functions. The effect of low consumption

Pending Publication Date: 2022-05-10
国网河北省电力有限公司雄安新区供电公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects in the above-mentioned prior art, the present invention provides a contact on-off reliability detection device for a DC contactor in a DC system, which can solve the problem that the voltage sensor is directly connected to the contact and affects the dielectric properties of the contact system
Difficult to apply problems in nonlinear loads
The manual method has many detection steps, takes a long time and is inefficient, and the problem of high labor cost

Method used

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  • Device and method for detecting on-off reliability of contact of direct current contactor of direct current system
  • Device and method for detecting on-off reliability of contact of direct current contactor of direct current system
  • Device and method for detecting on-off reliability of contact of direct current contactor of direct current system

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0048] Such as figure 1 As shown, the on-off reliability detection device of the DC contactor contact of the DC system mainly detects the number of on-off contacts of the DC contactor. Detect the number of on-off contacts of the DC contactor reflected by the mechanical structure.

[0049] It includes a digital Hall element, a single-chip microcomputer unit, a relay drive unit and a keyboard display unit. The single-chip microcomputer unit includes an external interrupt interface, a first common I / O interface and a second common I / O interface. The relay drive unit includes a triode and Omron relays, the keyboard display unit includes a keyboard array and a display screen.

[0050] Such as figure 2 As shown, the platform where the Hall element is located and the supporting structure of the platform are described, such as image 3 As shown, the mounting permanent magnet position is described.

[0051] Measuring unit:

[0052] The model of the digital Hall element is A3144, ...

specific Embodiment approach 2

[0063] Such as Figure 4 As shown, through the keyboard display unit, set the parameters for detecting the DC contactor test, including the number of times the contactor is turned on and off, the interval between the on and off of the DC contactor, etc.;

[0064] The start of the test is confirmed through the keyboard display unit, and the display part in the keyboard display unit will synchronously display the real-time test results after the test is started;

[0065] The single-chip unit controls the relay drive unit through the ordinary I / O interface to complete the command to turn on and off the DC contactor coil. At this time, the DC contactor will pull in when the coil is powered on, and disconnect when the coil is powered off;

[0066] When the DC contactor is closed, the permanent magnet on the mechanical structure of the contactor contact will be far away from the digital Hall element in the measurement unit, and the measurement unit outputs a low level; when the DC c...

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Abstract

The invention discloses a direct-current system direct-current contactor contact on-off reliability detection device and method, relates to the field of detection devices, and aims to solve the problems that a voltage sensor is directly connected with a contact, the dielectric property of a contact system is affected, and the voltage sensor is difficult to apply in a nonlinear load. In order to solve the problem that a laser displacement sensor or an acceleration sensor has high requirements on installation occasion environments, the device comprises a digital Hall element, a single-chip microcomputer unit, a relay driving unit and a keyboard display unit, and the single-chip microcomputer unit comprises an external interrupt interface, a first common I / O interface and a second common I / O interface. The relay driving unit comprises a triode and a relay, and the keyboard display unit comprises a keyboard array and a display screen. Under the condition that the performance of the contact medium is not changed, the reliability of the on-off test of the direct current contactor is improved. The problem that the dielectric property of a contact system is affected due to the fact that a voltage sensor is directly connected with a contact is solved.

Description

technical field [0001] The invention relates to the field of detection devices, in particular to a device and method for detecting the on-off reliability of a DC contactor contact in a DC system. Background technique [0002] With the rapid development of the power network, compared with the AC system, the DC power supply system has gradually been widely used due to its significant advantages such as good system stability, good load characteristics, and simple control. As one of the basic components in the electrical control system, the DC contactor plays a vital role in the safety and reliability of the DC power supply system. [0003] DC contactor refers to a contactor whose iron core is controlled by DC, and its load can be DC or AC. The iron core of the DC contactor is different from the AC contactor. It has no eddy current, and the attracting coil of the DC contactor can pass through DC, so there is no impact starting current, and there will be no violent impact on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 侯磊贾永会蔡毅常征张闯陈月
Owner 国网河北省电力有限公司雄安新区供电公司
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