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On-load tap-changer inherent frequency calculation method based on fluid-solid coupling

A technology of on-load tapping and natural frequency, applied in calculation, design optimization/simulation, instrument, etc., can solve problems such as complex cycle, no practical significance, and low precision

Active Publication Date: 2019-04-19
JIANGSU ELECTRIC POWER CO +2
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  • Description
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  • Application Information

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Problems solved by technology

Among them, HHT can avoid complex mathematical calculations to achieve the purpose of fast calculations, but from the perspective of mathematics and physics, this method has no practical significance, and the accuracy is not high, and the cycle is too complicated
Wavelet analysis has the characteristics of multi-resolution, and can observe absorption signals from coarse to fine, but this method is not suitable for nonlinear signals

Method used

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  • On-load tap-changer inherent frequency calculation method based on fluid-solid coupling
  • On-load tap-changer inherent frequency calculation method based on fluid-solid coupling
  • On-load tap-changer inherent frequency calculation method based on fluid-solid coupling

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Embodiment Construction

[0020] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] A method for calculating the natural frequency of on-load tap-changers based on fluid-solid coupling wet mode method, the specific flow chart is as follows figure 1 As shown, the method includes the following steps:

[0022] Step 1: Measure the size of the on-load tap-changer.

[0023] Accurately measure the outer dimensions of the barrel cover of the on-load tap-changer, the size of the air valve, the inner diameter and height of the switch barrel, the height of the rotating shaft, and the distance from the static contact to the rotating shaft.

[0024] Step 2: Based on the dimensions measured in Step 1 and based on the theory of fluid-structure interaction, a geometric model of the on-load tap-changer is established.

[0025] The overall appearance model established according to the dimensions measured in step 1 is as follows f...

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Abstract

The invention discloses an on-load tap-changer inherent frequency calculation method based on fluid-solid coupling. The method mainly comprises the steps that firstly, measuring the size of an on-loadtap-changer; 2, establishing an on-load tap-changer geometric model based on a fluid-solid coupling theory according to the size measured in the step 1; Step 3, according to the model established inthe step 2, calculating a first-order mode, namely an internal inherent frequency, in the on-load tap-changer by adopting a wet mode method; And 4, verifying the correctness of the inherent frequencyof the on-load tap-changer calculated in the step 3, and correcting the inherent frequency of the on-load tap-changer. Through comparison with experimental data, the correctness of the inherent frequency obtained by the calculation method is verified, and the calculation method can be used as a characteristic quantity of subsequent fault research and a basis for comparison and optimization of measurement points during transient analysis.

Description

technical field [0001] The invention relates to a method for calculating the natural frequency of an on-load tap-changer, in particular to a method for calculating the natural frequency of the internal contact collision of the on-load tap-changer analyzed by the wet mode method, which belongs to the fault monitoring and fault detection of the on-load tap-changer vibration field. Background technique [0002] With the rapid development of the power industry, the volume of power equipment and the scale of the power network are also increasing day by day. The possible failure of power equipment will cause huge economic losses and adverse social impacts, which puts forward higher requirements and unprecedented requirements for power supply quality. challenge. Therefore, effective measures must be taken to improve the power supply quality of the power system and ensure the safe, reliable, economical and stable operation of power equipment and systems. Condition-based maintenanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G01H17/00
CPCG01H17/00G06F30/20Y02E60/00
Inventor 王梁陈冰冰司小庆马宏忠张勇严岩曹宇高沁陈明徐礼浩
Owner JIANGSU ELECTRIC POWER CO