Lightning arrester device for monitoring whether fault occurs in real time

A technology for real-time monitoring of faults, applied in the field of lightning arresters, can solve the problems of threatening the personal safety of detection personnel and low detection efficiency, and achieve the effects of reducing workload, improving reliability, reducing economic losses and potential safety hazards

Pending Publication Date: 2020-12-18
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the traditional manual method is used to detect the arrester, the following problems will occur: 1. The high voltage of the transmission line will threaten the personal safety of the inspector; 2. The detection efficiency is not high

Method used

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  • Lightning arrester device for monitoring whether fault occurs in real time
  • Lightning arrester device for monitoring whether fault occurs in real time
  • Lightning arrester device for monitoring whether fault occurs in real time

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Experimental program
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Effect test

Embodiment 1

[0028] Such as Figure 1 to Figure 4 As shown, the present invention aims to design a lightning arrester, which can add an independent detection function to the original lightning protection function, and can detect whether the lightning arrester is working normally when the transmission line is not powered off.

[0029] Specifically, this embodiment discloses a lightning arrester device that monitors itself in real time for failure, mainly including a lightning arrester, a detection device for detecting whether the lightning arrester is in a normal operating state, and a communication device for remote alarming. One end of the arrester is connected to the fire wire, and the other end is connected to one end of the detection device. The other end of the detection device is grounded. The communication device is connected with the detection device and sends the abnormal data to the remote server.

[0030] The detection device mainly includes three structures, namely a first de...

Embodiment 2

[0039] This embodiment discloses a detection principle and implementation method of a lightning arrester device that monitors itself in real time for failure:

[0040] full current method (such as figure 2 Shown): It is a special AC mA meter connected in series with the ground terminal of the arrester. This device can not only measure the full current flowing through the zinc oxide arrester, but also calculate the discharge times of the arrester. We know that the total leakage current flowing through the arrester is composed of resistive component and capacitive component, no matter whether the arrester fails or not, its capacitive current component is almost unchanged. When a serious accident occurs to the zinc oxide arrester, the resistive current of the arrester will change, so the health of the arrester can be judged by detecting whether the resistive current changes by the full current method. The full current method is easy to operate and is suitable for occasions where...

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Abstract

The invention discloses a lightning arrester device for monitoring whether a fault occurs or not in real time. The lightning arrester device mainly comprises a lightning arrester, a detection device and a communication device. When the outer porcelain sleeve of the lightning arrester is polluted and is influenced by rainwater and moisture in the long-term operation process, potential imbalance andconductivity change occur in the operation process, so that the total leakage current flowing through the lightning arrester is suddenly changed, and the resistive current component of the lightningarrester is suddenly increased; when a zinc oxide valve plate is affected with damp, the resistive fundamental current flowing through the lightning arrester is greatly increased, but the increase ofmultiple harmonic components of the zinc oxide valve plate is not very obvious; when the zinc oxide is in an aging state, the resistive multiple harmonic current of the zinc oxide valve plate can be obviously increased, and relatively, the increase of the resistive fundamental current of the zinc oxide valve plate is not very obvious. Therefore, whether the lightning arrester breaks down or not can be judged by monitoring the total current, the resistive current, the resistive fundamental current and the multiple harmonic current flowing through the zinc oxide valve plate.

Description

technical field [0001] The invention relates to the field of lightning arresters, in particular to a lightning arrester device capable of monitoring itself in real time for failure. Background technique [0002] At present, there are many kinds of surge arresters on the market, and the common ones are tubular arresters, valve arresters and zinc oxide arresters. Among them, tubular arresters have an outer gap, are greatly affected by the environment, have a steeper volt-second characteristic curve, and have a large discharge dispersion. Disadvantages, it is not easy to achieve reasonable insulation coordination with the protected equipment; there is a continuous flow phenomenon in the valve-type arrester, and the follow-up current problem must be considered when it is applied to a high-current AC circuit; the leakage current of the zinc oxide arrester may cause the device to age in advance. However, from all aspects, it has the advantages of large flow capacity, no gap, no fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/52G01R19/00G01R15/18
CPCG01R31/00G01R31/52G01R19/0092G01R15/183
Inventor 安昱明张学习程健明梁士流
Owner GUANGDONG UNIV OF TECH
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