阅读说明：本技术 输电杆塔绝缘子带电检测方法 (Live detection method for insulator of transmission tower ) 是由 王克强 唐晓宁 袁红斌 郑玉山 梁晓龙 田翼飞 刘铸 张灿煜 刘刚 金峰 宁力 于 2020-12-26 设计创作，主要内容包括：本发明公开了一种输电杆塔绝缘子带电检测方法,其采集模块采集输电杆塔泄漏电流数据,精密电阻采样模块将电流信号转化为电压信号,并对信号进行电压放大、滤波处理,消除干扰信号,通过信号隔离器将信号中的高压端和低压端进行隔离保护；A/D转换模块将接收的滤波后的电压信号转换成数字信号输出给数据处理模块；数据处理模块将接收的电压波形数字信号绘制成对应杆塔位置的当前冲击响应曲线；判断模块比较当前冲击响应曲线和历史冲击响应曲线之间的数值,当前冲击响应曲线的数值若超过设定阈值,则输出报警信号至移动终端。本发明可精准判别杆塔绝缘子状态,保障电力系统安全、可靠的运行。(The invention discloses a live detection method for an insulator of a transmission tower.A collection module collects leakage current data of the transmission tower, a precision resistance sampling module converts a current signal into a voltage signal, performs voltage amplification and filtering processing on the signal to eliminate an interference signal, and performs isolation protection on a high-voltage end and a low-voltage end in the signal through a signal isolator; the A/D conversion module converts the received filtered voltage signal into a digital signal and outputs the digital signal to the data processing module; the data processing module draws the received voltage waveform digital signal into a current impact response curve corresponding to the position of the tower; and the judging module compares the numerical value between the current impact response curve and the historical impact response curve, and outputs an alarm signal to the mobile terminal if the numerical value of the current impact response curve exceeds a set threshold value. The invention can accurately judge the state of the insulator of the tower and ensure the safe and reliable operation of the power system.)

1. A live detection method for an insulator of a transmission tower is characterized by comprising the following steps:

the acquisition module acquires leakage current data of the transmission tower and outputs the acquired leakage current data to the precision resistance sampling module, the precision resistance sampling module converts a current signal into a voltage signal, performs voltage amplification and filtering processing on the signal to eliminate an interference signal, and performs isolation protection on a high-voltage end and a low-voltage end in the signal through a signal isolator; the A/D conversion module converts the received filtered voltage signal into a digital signal and outputs the digital signal to the data processing module; the data processing module draws the received voltage waveform digital signals of each transmission tower into a current impact response curve corresponding to the position of the tower; the data storage module stores current impact response curves and historical impact response curves of all towers; the judging module compares the numerical values between the current impact response curve and the historical impact response curve of each tower, and if the numerical value of the current impact response curve exceeds a set threshold, an alarm signal corresponding to the position of the tower is output to the mobile terminal; and the mobile terminal receives the alarm signal sent by the judging module and displays the position of the tower.

2. The live-line detection method for the insulator of the transmission tower as recited in claim 1, wherein the collection module is connected to the tower, the insulator string, the lead and the hardware.

3. The live detection method for the insulator of the transmission tower as claimed in claim 1, wherein the acquisition module comprises a GPS module for acquiring GPS information.

4. The live-line detection method for the insulators of the transmission towers as recited in claim 1, wherein the collection module adopts a leakage current sensor transmitter, and the rated current of the leakage current sensor transmitter is set to be 5mA-1000 mA.

5. The live detection method for the insulators of the transmission tower as claimed in claim 1, wherein the judgment module includes a waveform analysis module, and is configured to calculate whether the amplitude of the filtered digital signal exceeds a set threshold of the transmission tower.

6. The live-line detection method for the insulator of the transmission tower as recited in claim 1, wherein the mobile terminal comprises a human-computer interaction module for inquiring and deleting various human-computer interaction operation instructions.

Technical Field

The invention relates to the technical field of transmission tower detection, in particular to a live-line detection method for an insulator of a transmission tower.

Background

The insulator is exposed in the environment for a long time, the insulating property of the insulator can be continuously reduced along with the lengthening of the operation time, and the insulator of the transmission tower can be subjected to the phenomena of degradation or zero value irregularly. Therefore, in order to ensure the operation safety of the insulator of the transmission tower, insulator detection is required to be carried out periodically.

In the prior art, the insulator live-line detection method generally comprises an observation method, an ultrasonic detection method, an infrared imaging method and the like, wherein the observation method can not be found due to an unsatisfactory observation angle or dirty coverage, and the internal insulation defect can be missed due to no obvious appearance characteristic, so that the observation method is simple and convenient but unreliable; the ultrasonic detection method has the advantages of high sensitivity, high speed, low cost, simple operation, safety, reliability and the like, can accurately detect the insulator with the crack, but does not work on the insulator without the crack, and can only detect the insulator one by one on site due to the coupling, attenuation and performance problems of the ultrasonic transducer of the ultrasonic wave; the infrared imaging method has high instrument cost, and the temperature measurement is easily influenced by the factors of sunlight, strong wind, moisture, environment temperature, abrupt change of the surface temperature of the insulator and the like.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a live-line detection method for an insulator of a transmission tower, and solves the problems of high cost and large limitation in the prior art for judging the state of the insulator of the tower.

In order to achieve the purpose, the invention provides the following technical scheme:

a live detection method for an insulator of a transmission tower comprises the following steps:

the acquisition module acquires leakage current data of the transmission tower and outputs the acquired leakage current data to the precision resistance sampling module, the precision resistance sampling module converts a current signal into a voltage signal, performs voltage amplification and filtering processing on the signal to eliminate an interference signal, and performs isolation protection on a high-voltage end and a low-voltage end in the signal through a signal isolator; the A/D conversion module converts the received filtered voltage signal into a digital signal and outputs the digital signal to the data processing module; the data processing module draws the received voltage waveform digital signals of each transmission tower into a current impact response curve corresponding to the position of the tower; the data storage module stores current impact response curves and historical impact response curves of all towers; the judging module compares the numerical values between the current impact response curve and the historical impact response curve of each tower, and if the numerical value of the current impact response curve exceeds a set threshold, an alarm signal corresponding to the position of the tower is output to the mobile terminal; and the mobile terminal receives the alarm signal sent by the judging module and displays the position of the tower.

The collecting module is connected with the pole tower, the insulator string, the conducting wire and the hardware fitting.

The acquisition module comprises a GPS module and is used for acquiring GPS information.

The acquisition module adopts a leakage current sensor transmitter, and the rated current of the acquisition module is set to be 5mA-1000 mA.

The judging module comprises a waveform analyzing module used for calculating whether the amplitude of the filtered digital signal exceeds the set threshold of the transmission tower.

The mobile terminal comprises a man-machine interaction module for realizing inquiry and deletion of various man-machine interaction operation instructions.

The invention has the technical effects and advantages that:

the invention realizes the collection of various tiny alternating currents without power failure, converts the tiny current signals into voltage signals through the precise resistance sampling device, eliminates interference after amplification and filtering, stabilizes the low-voltage end and the high-voltage end of the voltage through the signal isolator, carries out isolation protection on the voltage signals, correspondingly converts the voltage signals into displayable digital signals, transmits the digital signals to the data processing module, finally judges the state of the insulator through the judging module, is visual and accurate, reduces the influence of various factors on information data, has extremely small error and extremely high precision, and ensures the safe and reliable operation of an electric power system.

Drawings

FIG. 1 is a block diagram showing the structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

The transmission towers (tower 1-tower n) are distributed at intervals, the overhead ground wires (lightning wires) of the transmission towers are erected in parallel with the transmission lines of the transmission towers, mutual inductance exists between the overhead ground wires, induced electromotive force can be generated on the overhead ground wires, and the overhead ground wires and the towers between the two towers are grounded to form a loop, so that loop current is formed.

A live detection method for an insulator of a transmission tower comprises the following steps:

the acquisition module acquires leakage current data of the transmission tower and outputs the acquired leakage current data to the precision resistance sampling module, the precision resistance sampling module converts a current signal into a voltage signal, performs voltage amplification and filtering processing on the signal to eliminate an interference signal, and performs isolation protection on a high-voltage end and a low-voltage end in the signal through a signal isolator; the A/D conversion module converts the received filtered voltage signal into a digital signal and outputs the digital signal to the data processing module; the data processing module draws the received voltage waveform digital signals of each transmission tower into a current impact response curve corresponding to the position of the tower; the data storage module stores current impact response curves and historical impact response curves of all towers; the judging module compares the numerical values between the current impact response curve and the historical impact response curve of each tower, and if the numerical value of the current impact response curve exceeds a set threshold, an alarm signal corresponding to the position of the tower is output to the mobile terminal; and the mobile terminal receives the alarm signal sent by the judging module and displays the position of the tower.

The collecting module is connected with the pole tower, the insulator string, the conducting wire and the hardware fitting.

The acquisition module comprises a GPS module and is used for acquiring GPS information.

The acquisition module adopts a leakage current sensor transmitter, and the rated current of the acquisition module is set to be 5mA-1000 mA.

The judging module comprises a waveform analyzing module used for calculating whether the amplitude of the filtered digital signal exceeds the set threshold of the transmission tower.

The mobile terminal comprises a man-machine interaction module for realizing inquiry and deletion of various man-machine interaction operation instructions.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.