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Modeling Method for Acoustic Transmission of GIL Telescoping Joints

A modeling method and a technology of expansion joints, which are applied in the directions of instruments, design optimization/simulation, electrical digital data processing, etc., can solve problems such as differences in sensor sensitivity, and achieve the effects of reducing test costs, strong algorithm versatility, and strong pertinence

Active Publication Date: 2022-04-15
武汉朗德电气有限公司 +1
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Problems solved by technology

However, the numerical simulation results are ideal results. The actual GIL ultrasonic fault location online monitoring system is often disturbed by on-site noise, and the sensitivity of the sensors used is also different.

Method used

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  • Modeling Method for Acoustic Transmission of GIL Telescoping Joints
  • Modeling Method for Acoustic Transmission of GIL Telescoping Joints
  • Modeling Method for Acoustic Transmission of GIL Telescoping Joints

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Embodiment

[0034] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0035] like figure 1 As shown, the present invention provides a GIL expansion joint sound wave transmission modeling method, comprising the following steps:

[0036] Step 1: If figure 2 As shown in Fig. 1, the sound transmission characteristic test of GIL expansion joint unit is carried out on a section of GIL containing expansion joints, including the following steps:

[0037] Step 1-1: The standard percussion sound source is generated by striking the GIL shell with a piezoelectric impact hammer. Considering that the material of the GIL shell is aluminum alloy and the texture is relatively soft, the impact hammer uses a rubber hammer head and passes The signal conditioner is connected to the oscilloscope to output the excitation force signal;

[0038] Step 1-2: Output the acoustic vibration time-domain waveform signal through the sensor of...

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Abstract

The invention relates to a sound wave transmission modeling method, which belongs to the technical field of electric power monitoring, in particular to a GIL expansion joint sound wave transmission modeling method. This method combines test and numerical simulation methods, can consider the influence of noise interference and sensor sensitivity on the results of GIL ultrasonic fault location online monitoring system, and calculate the attenuation and time delay of sound waves passing through different types of GIL expansion joints. Strong, with a wider range of engineering application prospects.

Description

technical field [0001] The invention relates to a sound wave transmission modeling method, which belongs to the technical field of electric power monitoring, in particular to a GIL expansion joint sound wave transmission modeling method. Background technique [0002] GIL is a transmission line with large transmission capacity, high reliability, and little interaction with the environment. Its overall length is generally long, and it is usually installed in a segmented and modular manner. When an insulation fault occurs, how to quickly and accurately locate the fault location, and then replace the damaged pipe section in time without dismantling other pipe sections has become a hot topic in GIL operation and maintenance. [0003] When there is an expansion joint structure between the sensor and the fault point, the existing GIL ultrasonic fault location on-line monitoring method has problems such as low positioning result accuracy and poor system reliability, because there ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/14
Inventor 陈勇黄文雄郝乾王永君杜志叶郝兆扬熊志云袁攀张磊刘静
Owner 武汉朗德电气有限公司
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