Relay contact performance detection device applied to relay protection device

A relay protection device and relay contact technology, which is applied in circuit breaker testing, measuring devices, instruments, etc., can solve the problem that the performance of relay contacts is not perfected in testing methods, and achieve the effect of ensuring the action time sequence.

Active Publication Date: 2018-12-18
NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There is no perfect test method for the performance assessment of the relay contacts used in the relay protection device in the power system. Therefore, in order to provide a relay contact performance detection device for the power system industry, it is a subject that must be studied in the current power system industry.

Method used

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  • Relay contact performance detection device applied to relay protection device
  • Relay contact performance detection device applied to relay protection device
  • Relay contact performance detection device applied to relay protection device

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, a relay contact performance detection device for a relay protection device includes a main circuit 15 , a control circuit 16 and a host computer 14 . The DC 220V voltage is connected to one end of the relay contact 2 through the first control switch 1, and the other end of the relay contact 2 is connected to the 30W circuit 4 and the 1000W circuit 5, in which the 30W circuit 4 is directly connected to the relay contact 2, and the 1000W circuit 5 is connected to the relay contact 2 through the second control switch 3, and the action and shutdown of the relay contact 2 are determined by whether the relay protection device 7 operates, and the fault current is connected to the relay protection device 7 through the third control switch 6 superior. When the third control switch 6 is closed, the relay protection device 7 receives a fault cu...

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Abstract

The invention discloses a relay contact performance detection device applied to a relay protection device. A 220V direct current voltage is connected to one end of a relay contact through a first control switch, the other end of the relay contact is connected to a 30W circuit and a 1000W circuit, the 1000W circuit is connected to the relay contact through a second control switch, the operations and on-off of the relay contact are controlled by the relay protection device; a direct current voltage transmitter is used for acquiring the voltage of the relay contact; an Event (EV) manager conditions the circuit output through Pulse Width Modulation (PWM) waves to drive the control switches; a voltage acquisition circuit makes output to an Analog to Digital Converter (ADC) module; the states ofthe control switches are fed back to an Input/Output (IO) interface of a Digital Signal Processing (DSP) controller through a digital circuit; a communication module of the DSP controller communicates with a host computer through an Ethernet circuit. The invention is used for judging whether the relay has been damaged, and counting the number of operations of the relay, thus facilitating detection of the relay contact applied to relay protection.

Description

technical field [0001] The invention relates to a relay contact performance detection device for a relay protection device, belonging to the technical field of relay performance detection. Background technique [0002] At present, with the continuous development of smart grids, relay protection devices are becoming more and more intelligent, and relay protection devices provide technical support for the reliable operation of power systems. The relay protection device quickly finds the fault point by collecting the voltage and current status, and realizes the protection tripping and closing function. Whether the tripping and closing can be performed normally is related to the safety of the power grid system, so the reliability of the tripping and closing exit circuit of the device is also very important. Especially important, the existing power system basically uses relay contacts as the trip outlet, so the performance of relay contacts has become an indispensable part of eva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3278
Inventor 牟晋力史志伟岳峰董金才吴凯王鹤群
Owner NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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