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High voltage pole lightning conductor lightning impact current monitoring system

A technology for lightning impact and current monitoring, applied in signal transmission systems, digital measurement technology for measurement, instruments, etc., can solve the problems of high cost, inconvenient installation and measurement, etc., to reduce electromagnetic interference, facilitate the number of detection equipment, and facilitate The effect of installation

Inactive Publication Date: 2016-06-08
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Rogowski coils can detect lightning current amplitude and time characteristics very well, but for microsecond-level lightning currents, Rogowski coils need to be specially manufactured, and the cost is relatively high
Moreover, the Rogowski coil needs to be placed on the line to be measured to measure the current well, and it is relatively inconvenient to install and measure.

Method used

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  • High voltage pole lightning conductor lightning impact current monitoring system
  • High voltage pole lightning conductor lightning impact current monitoring system
  • High voltage pole lightning conductor lightning impact current monitoring system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0031] According to the experimental test, in the normal operation environment of the transmission line without lightning current, there are three types of magnetic fields: 1. The magnetic field generated by the alternating current in the transmission line; 2. The fixed geomagnetic field generated by the earth's magnetic poles; 3. Mobile communication equipment Generated high frequency magnetic field. These three types of magnetic fields must be filtered out in the process of detecting the magnetic field generated by the lightning current.

[0032] 1. In the environment of high-voltage transmission lines, there is a 50Hz AC magnetic field generated by a 50Hz sinusoidal AC current on the line, and a harmonic current that is a multiple of 50Hz to generate a magnetic field. The larger harmonic frequency compared with the amplitude is about 50Hz rated frequency Thirty times. Therefore, the frequency of the magnetic field generated on the transmission line can reach up to 4kHz, an...

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Abstract

The invention relates to a high voltage pole lightning conductor lightning impact monitoring system. The system comprises a lightning current detection device and a monitoring center, wherein the lightning current detection device and the monitoring center are connected through a GPRS mobile network, the lightning current detection device comprises a three-dimensional magnetic field detection sensor, the three-dimensional magnetic field detection sensor is connected with a primary amplification circuit, the primary amplification circuit is connected with a DC component removal circuit, the DC component removal circuit is connected with a secondary amplification circuit, the secondary amplification circuit is connected with a band-pass filtering circuit, the band-pass filtering circuit is connected with a data acquisition module, and the data acquisition module is connected with a GPRS data transmission module. The system employs the X, Yand Z triaxial magnetic field sensor, and lightning waveform change can be monitored in the monitoring center through the data.

Description

technical field [0001] The invention relates to a lightning impulse current monitoring system for a lightning protection line of a high-voltage pole tower, which relates to the field of lightning protection of transmission iron towers. Background technique [0002] UHV transmission lines are erected at a high height and cover a wide area. The terrain they pass is complex and vulnerable to lightning strikes. It is imminent to do a good job in lightning protection for UHV lines. Lightning monitoring is the focus of UHV line lightning protection work, the main content includes the detection of lightning current amplitude when the line is struck by lightning and the identification of line lightning fault types. The distribution law of the lightning current amplitude of the lightning strike line can be obtained through the measurement of the lightning current amplitude, and the lightning current impact velocity of the lightning strike line can be obtained through the measurement ...

Claims

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Application Information

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IPC IPC(8): G01R19/25G08C17/02
Inventor 佘瑾杜鹏飞肖遥扈诗扬
Owner CHINA THREE GORGES UNIV
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