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Pole tower impact wave impedance detecting method and device based on tower top reflected wave

An impedance detection and shock wave technology, applied in the high-voltage field, can solve the problems of inability to accurately reflect the shock wave impedance of the tower, and the voltage and current are not changing synchronously, and achieve the effect of small error, simple and easy implementation, and simple operation.

Inactive Publication Date: 2019-03-22
TSINGHUA UNIV +3
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Problems solved by technology

[0004] However, most of the traditional tower shock wave impedance measurement methods use a simple voltage-current ratio measurement method, but usually the voltage and current do not change synchronously, so using the voltage-current ratio at the same time cannot accurately reflect the tower shock wave impedance

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  • Pole tower impact wave impedance detecting method and device based on tower top reflected wave
  • Pole tower impact wave impedance detecting method and device based on tower top reflected wave
  • Pole tower impact wave impedance detecting method and device based on tower top reflected wave

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Embodiment Construction

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0039] The following describes the tower shock wave impedance detection method and device based on tower top reflected waves according to the embodiments of the present invention with reference to the accompanying drawings. First, the tower shock wave impedance detection method based on tower top reflected waves according to the embodiments of the present invention will be described with reference to the drawings .

[0040] figure 1 It is a flowchart of a tower shock wave impedance detection method based on tower top reflected w...

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Abstract

The invention discloses a pole tower impact wave impedance detecting method and device based on a tower top reflected wave. The method comprises the following steps: enabling one end of a current leadto be connected with a positive electrode of an impact generator, and enabling the other end of the current lead to be connected with the top of a pole tower, wherein a negative electrode of the impact generator is connected to the ground; enabling one end of a voltage measuring probe to be connected with the current lead connected to the top of the pole tower, and enabling the output end of thevoltage measuring probe to be connected with an oscilloscope, wherein the other end of the voltage measuring probe is connected to the ground; acquiring an impact step wave according to the impact generator, thereby acquiring a voltage waveform of the tower top according to the impact step wave, wherein the voltage waveform comprises an incident voltage wave and a reflected voltage wave; and according to an amplitude value of the incident voltage wave, an amplitude value of the reflected voltage wave and wave impedance of the current lead, acquiring impact wave impedance of the pole tower. Themethod is capable of measuring the impact wave impedance of the pole tower, effectively improving accuracy and reliability of detection, small in error, and simple and easy to implement.

Description

technical field [0001] The invention relates to the field of high voltage technology, in particular to a tower shock wave impedance detection method and device based on tower top reflected waves. Background technique [0002] Lightning protection of transmission lines has always been a problem that plagues line operation. For a long time, a large number of protective measures have been adopted at home and abroad, such as reducing the impact grounding resistance of tower grounding devices, using differentiated insulation, installing shielded wires, and installing lightning arresters, etc. According to the classification statistics of power grid faults, in areas with a high trip rate in my country, the number of accidents due to lightning strikes accounts for about 40% to 70% of the total number of trips in high-voltage line operation. Especially in mountainous areas with frequent thunderstorms, high soil resistivity, and complex terrain, the accident rate caused by lightning ...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R27/18
CPCG01R27/18G01R31/1263
Inventor 张波再木然·乌斯曼黄海鲲谢文炳王森李志忠康鹏何金良曾嵘余占清胡军庄池杰
Owner TSINGHUA UNIV
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