Ultrahigh-frequency sensor evaluation method by utilizing GTEM cell

A UHF sensor and frequency point technology, applied in instruments, measuring devices, measuring electricity and other directions, can solve the problems of test result error, weak energy, etc., to achieve stable detection, strong repeatability, and avoid randomness.

Inactive Publication Date: 2017-05-17
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

But there are also the following disadvantages: the energy of the decomposition frequency of the pulse signal is very weak in the range above 1000MHz, resulting in large errors in test results

Method used

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  • Ultrahigh-frequency sensor evaluation method by utilizing GTEM cell
  • Ultrahigh-frequency sensor evaluation method by utilizing GTEM cell
  • Ultrahigh-frequency sensor evaluation method by utilizing GTEM cell

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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] An embodiment of a method for evaluating a UHF sensor using a GTEM cell provided by the present invention is as follows: figure 1 As shown, specifically:

[0040] 1. Connect the signal generator to the GTEM cell, and determine the test area of ​​the UHF sensor in the GTEM cell.

[0041] 1. GTEM small room

[0042] The working principle of the GTEM cell: the signal generator generates a radio frequency signal with a certain amplitude and adjustable frequency, such as a sinusoidal signal with a field strength of 10V / m and ...

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Abstract

The invention provides an ultrahigh-frequency sensor evaluation method by utilizing a GTEM cell. The method comprises the following steps that 1) a test area of an ultrahigh-frequency sensor in the GTEM cell is determined; 2) a signal output curve of a signal generator is set; 3) the ultrahigh-frequency sensor is placed in the test area, the signal generator is controlled to carry out output according to a signal output curve, and the voltage peak of an output signal of the ultrahigh-frequency sensor in each frequency point of the signal output curve is recorded; and 4) the equivalent height of each frequency point is calculated according to the field intensity of the test area and the voltage peak. Compared with the prior art, the method of the invention can test the equivalent height of the ultrahigh frequency sensor effectively, and the average equivalent height in a preset frequency range is calculated and serves as an index for evaluating the sensor performance.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation equipment, in particular to a method for evaluating UHF sensors using a GTEM cell. Background technique [0002] The existing methods for evaluating UHF sensors are mainly qualitative evaluations of their detection effectiveness. For example, a partial discharge model is set inside the transformer or GIS, and the apparent discharge monitoring discharge model of the traditional pulse current method is used synchronously under the condition of applying high voltage to evaluate the detection of the sensor by whether the discharge can be detected or the intensity of the discharge can be detected ability. However, the method of setting the fault model on the physical model and conducting the high-voltage test has great contingency and randomness. If the high-voltage discharge of the same discharge model has large differences, it is difficult to conduct a highly consistent...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 杨圆阎春雨毕建刚吴立远常文治弓艳朋袁帅是艳杰邓彦国孟楠
Owner CHINA ELECTRIC POWER RES INST
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