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A method and system for real-time detection of the switching and withdrawing state of the outlet pressure plate of a power protection device

An export pressure plate and real-time detection technology, which is applied in the direction of using electrical devices, measuring devices, and electromagnetic means, can solve problems such as difficult installation, missed casting, and error-prone detection, and achieve improved safety, wide application range, and high detection efficiency. Effect

Active Publication Date: 2018-09-07
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, in the existing relay protection devices, it is generally possible to realize real-time detection of the switching status of the functional pressure plate, but there is no detection measure for the outlet pressure plate. Although some of the latest outlet pressure plates in the power system adopt pressure plate automatic collection However, due to its unreasonable design, there are problems such as difficult installation and error-prone detection, it is difficult to effectively detect the installed outlet platen in real time
[0003] On the other hand, because the installation position of the outlet pressure plate is generally low and the arrangement is dense, the throwing and withdrawing of the outlet pressing plate must be completed manually, which makes the correct state of the exit pressing plate completely dependent on the actual technical level of the inspection personnel and sense of responsibility, it is easy to make mistakes such as missed casting and miscasting
With the continuous improvement of the automation level of the power grid, it is even more difficult to detect missed and wrong switching errors in time. In actual operation, relay protection malfunctions and refusal to operate due to improper switching of the outlet pressure plate occur from time to time, which seriously affects the power system. The safe operation of the system leaves a great potential safety hazard

Method used

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  • A method and system for real-time detection of the switching and withdrawing state of the outlet pressure plate of a power protection device
  • A method and system for real-time detection of the switching and withdrawing state of the outlet pressure plate of a power protection device
  • A method and system for real-time detection of the switching and withdrawing state of the outlet pressure plate of a power protection device

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Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the steps of the real-time detection method for the status of the outlet pressure plate of the power protection device in this embodiment include:

[0039]1) Arrange the stroke induction sensor between the fixed component of the outlet pressure plate and the switching movable component of the switch, and calibrate the output signal amplitude range of the stroke induction sensor when the outlet pressure plate is in the input state, the virtual connection state and the exit state;

[0040] 2) Collect the output signal of the stroke induction sensor;

[0041] 3) Match the output signal with the output signal amplitude range of the stroke induction sensor when the outlet pressure plate is in the input state. If it matches, it will determine that the outlet pressure plate is in the input state and exit. If it does not match, skip to the next step;

[0042] 4) Match the output signal with the output signal amplitude range of the stroke induction se...

Embodiment 2

[0053] This embodiment is basically the same as the first embodiment, and the main difference is that the structure of the detected outlet pressure plate 2 is different.

[0054] In this embodiment, the outlet pressing plate 2 is a spring type outlet pressing plate. Such as Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the fixed assembly 21 of the spring-type outlet pressure plate includes a crimping seat 216 with a positioning hole 215, the bottom of the positioning hole 215 is provided with a second electrical terminal 217, and the switching movable assembly 22 includes two ends. The pressing plate connecting piece 226 of the crimping head 225, the middle part of the pressing plate connecting piece 226 is provided with a rotating column 227, and the rotating column 227 is embedded in the crimping seat 216 so that the throwing and withdrawing switching movable assembly 22 can rotate the column 227 as the axis on the crimping seat 216 automatically rotate in t...

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Abstract

The invention discloses a power protection device outlet pressing plate commissioning and ceasing state real-time detection method and a power protection device outlet pressing plate commissioning and ceasing state real-time detection system. The method comprises steps: a stroke induction sensor is arranged, and output signal amplitude ranges in a commissioning state, a virtual connection state and a ceasing state are calibrated; output signals of the stroke induction sensor are acquired; the output signals and the output signal amplitude ranges in the commissioning state, the virtual connection state and the ceasing state of the outlet pressing plate of the stroke induction sensor are matched, and if a certain output signal amplitude range is matched, the state corresponding to the output signal amplitude range is decided. The system comprises a detection signal acquisition unit and the outlet pressing plate, wherein the outlet pressing plate comprises a fixing assembly and a commissioning and ceasing switching mobile assembly connected in a mobile mode; and the stroke induction sensor of the detection signal acquisition unit is arranged between the fixing assembly and the commissioning and ceasing switching mobile assembly of the outlet pressing plate. The commissioning and ceasing state of the arranged outlet pressing plate can be detected in real time, implementation is easy, the operation is convenient, and the detection accuracy is high.

Description

technical field [0001] The invention relates to the technical field of detection of relay protection equipment, in particular to a method and system for real-time detection of the switching and withdrawal status of an outlet pressure plate of a power protection device. Background technique [0002] At present, a large number of protective pressure plates are installed on the secondary system circuit of relay protection, including functional pressure plates and outlet pressure plates. Functional pressure plates are used to realize the functions of relay protection devices, such as main protection, remote backup protection, etc. Back function; the outlet pressure plate is used for circuit breaker tripping or the start of other function pressure plate. On the one hand, in the existing relay protection devices, it is generally possible to realize real-time detection of the switching status of the functional pressure plate, but there is no detection measure for the outlet pressur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/00
Inventor 欧阳帆杨俊武陈宏陈浩曾方刘海峰许立强敖非李辉梁文武沈杨臧欣
Owner STATE GRID CORP OF CHINA