Lightning arrester resistive current on-line monitoring method based on wireless synchronous sampling technology

A technology of synchronous sampling and resistive current, which is applied in the direction of measuring current/voltage, instruments, measuring electricity, etc., can solve the problems of inability to reduce the workload of arrester resistive current test and low work efficiency, and achieve accurate and stable real-time monitoring, Easy installation and accurate measurement results

Inactive Publication Date: 2018-01-09
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing test system cannot reduce the test workload brought by the arrester resistive current live detection to the inspectors. At the same time, the PT may be operated multiple times, the work efficiency is low, and there are many major safety hazards

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  • Lightning arrester resistive current on-line monitoring method based on wireless synchronous sampling technology

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Embodiment Construction

[0042] The invention is an online monitoring method for the resistive current of the arrester based on wireless synchronous sampling technology, which can be used for the online monitoring of the resistive current of the arrester of the whole station. Such as figure 1 As shown, figure 1 It is a schematic diagram of the working principle of the present invention. The present invention includes a current signal acquisition device 1, a voltage signal acquisition device 2, a handheld device terminal 3, a data acquisition device 4, an RS485 bus 5, and a comprehensive state monitoring unit 6. By installing the current signal acquisition device 1 on the end of the arrester body, the leakage current value of the arrester is obtained. The current signal acquisition device 1 collects, calculates, processes, stores and displays the current signal on the spot, and uses 2.4G wireless communication technology and data The acquisition device 4 communicates; the voltage signal acquisition de...

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Abstract

The invention belongs to the lightning arrester on-line monitoring technology field, and especially relates to a lightning arrester resistive current on-line monitoring method based on a wireless synchronous sampling technology. To be specific, the method is an on-line monitoring method used for detecting the electrical performance of a metal oxide lightning arrester. Tools employed by the methodinclude current signal collection devices, a voltage signal collection device, a handheld device terminal, a data collection device, an RS485 bus, and a comprehensive state monitoring unit. The handheld device terminal is equipped with an operating keyboard, a display screen and a communication interface, so operation, observation, data and waveform uploading or the like are convenient for testers. Storage data display and query functions can be realized, and the method accords with Interface Specifications for Condition Monitoring System of Smart Substation. The anti-interference capability of all the devices is improved, a reliable surge protection circuit is provided, over-voltage protection circuit designs are conducted for interfaces of a voltage and current signal collection measuring circuit, a power supply circuit, a communication circuit or the like, and the reliability of the devices is improved effectively.

Description

Technical field [0001] The invention belongs to the technical field of lightning arrester online monitoring, and in particular relates to an online monitoring method for the resistive current of a lightning arrester based on wireless synchronous sampling technology, in particular to an online monitoring method for detecting the electrical performance of a metal oxide arrester. Background technique [0002] Lightning arrester is an important overvoltage protection device and a powerful guarantee for the safe operation of the power system. Among them, metal oxide arresters are widely used in power grids due to their excellent nonlinearity and large current capacity. If a gapless metal oxide arrester fails, the problem will be more serious than a valve arrester with a series gap. Therefore, the work of measuring the resistive current of gapless metal oxide arresters during operation is more and more important. [0003] At present, all lightning arresters in substations are equipped w...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R31/00G08C17/02
Inventor 高强刘齐原峰代继成李在林潘丰厚张云华郭占男潘加玉李晓明韩月赵东旭陈瑞国
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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