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Substation undervoltage relay verification device, system and method

A technology for undervoltage relays and calibration devices, which is applied to measuring devices, circuit breaker tests, instruments, etc., can solve problems affecting the reliability of calibration, affecting the normal operation of substations, lack of calibration devices for undervoltage relays, etc., to achieve Avoid inaccurate calibration and improve the reliability of calibration

Pending Publication Date: 2022-01-28
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a problem with the undervoltage relay of the substation, it may affect the normal operation of the substation. Therefore, it is necessary to check the undervoltage relay of the substation
[0003] At present, the existing substation undervoltage relays usually operate when the access voltage is lower than the set action value. For example, when the bus voltage is lower than the set action value, the undervoltage relay is triggered to operate, but the undervoltage relay lacks a dedicated For the calibration device, it is necessary to manually judge whether the undervoltage relay is abnormal, which will affect the reliability of the calibration

Method used

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  • Substation undervoltage relay verification device, system and method
  • Substation undervoltage relay verification device, system and method

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Embodiment 1

[0036] figure 1 It is a structural block diagram of a substation undervoltage relay verification device provided in Embodiment 1 of the present invention. This embodiment is applicable to situations such as the verification of substation undervoltage relays. The substation undervoltage relay verification device includes: a rectifier 10, Sliding rheostat 20 , inverter 30 , signal collector 40 and controller 50 .

[0037] Among them, the rectifier 10 is used to access the mains and convert the mains into direct current; the sliding rheostat 20 is electrically connected to the rectifier for adjusting the voltage of the direct current; the inverter 30 is electrically connected to the sliding rheostat 20 and the substation undervoltage relay 60 , used to convert the regulated direct current into alternating current, and output the alternating current to the substation undervoltage relay 60; the signal collector 40 is electrically connected to the substation undervoltage relay 60, a...

Embodiment 2

[0053] Figure 6 It is a flow chart of a substation undervoltage relay verification method provided by Embodiment 2 of the present invention, refer to Figure 6 The substation undervoltage relay verification method is executed by the controller in the substation undervoltage relay verification device as described in any embodiment of the present invention, and the substation undervoltage relay verification method specifically includes the following steps:

[0054] Step 110, receiving an action signal of the substation undervoltage relay.

[0055] Among them, the signal collector in the substation undervoltage relay verification device is electrically connected to the controller, the signal collector collects the action signal of the substation undervoltage relay, and transmits the collected action signal to the controller, so that the controller receives the signal from the signal collector The transmitted action signal.

[0056] Step 120: Determine the state of the substati...

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Abstract

The embodiment of the invention discloses a substation undervoltage relay verification device, system and method. The transformer station undervoltage relay verification device comprises a rectifier used for accessing commercial power and converting the commercial power into direct current, a slide rheostat electrically connected with the rectifier and used for adjusting the voltage of the direct current, an inverter electrically connected with the slide rheostat and the substation undervoltage relay, and used for converting the voltage-regulated direct current into alternating current and outputting the alternating current to the substation under-voltage relay, a signal collector electrically connected with the substation undervoltage relay and used for collecting an action signal of the substation undervoltage relay, and a controller electrically connected with the rectifier, the slide rheostat, the inverter and the signal collector, and used for controlling the working states of the rectifier, the slide rheostat and the inverter and determining the state of the substation under-voltage relay according to the action signal. According to the technical scheme provided by the embodiment of the invention, the verification reliability of the undervoltage relay of the transformer substation can be improved.

Description

technical field [0001] The embodiment of the present invention relates to substation safety detection technology, in particular to a substation undervoltage relay verification device, system and method. Background technique [0002] In the power system, the substation is an essential part as a place for electric energy conversion. The undervoltage relay in the substation is used as a protection device to judge whether the busbar of the substation is out of voltage. When the substation bus loses voltage, it acts to protect the line. If there is a problem with the undervoltage relay of the substation, it may affect the normal operation of the substation. Therefore, it is necessary to verify the undervoltage relay of the substation. [0003] At present, the existing substation undervoltage relays usually operate when the access voltage is lower than the set action value. For example, when the bus voltage is lower than the set action value, the undervoltage relay is triggered t...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3278
Inventor 林夙姗温振兴朱雨婷陈洪胜
Owner GUANGDONG POWER GRID CO LTD
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