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Method for accurately obtaining temperature rise by calculating winding resistance value through phase difference method for low-frequency heating

A technology of low-frequency heating and phase difference method, which is applied in calculation, computer-aided design, and thermometers using electric/magnetic elements that are directly sensitive to heat, etc. It can solve the problems of damaging the life of insulating materials, insufficient drying of low-temperature windings, and inability to realize winding Precise temperature control and other issues to achieve guaranteed results and avoid high energy consumption

Active Publication Date: 2022-06-24
沈阳中科瑞达科技有限公司 +1
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  • Application Information

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Problems solved by technology

Therefore, it is impossible to achieve precise control of the temperature of each winding. There may be insufficient drying of low-temperature windings and excessive drying of high-temperature windings. This will damage the life of the insulating material, and the drying effect still needs to be improved.

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  • Method for accurately obtaining temperature rise by calculating winding resistance value through phase difference method for low-frequency heating
  • Method for accurately obtaining temperature rise by calculating winding resistance value through phase difference method for low-frequency heating
  • Method for accurately obtaining temperature rise by calculating winding resistance value through phase difference method for low-frequency heating

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the implementations. example. Based on the embodiments in the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] A method for accurately obtaining temperature rise by calculating a winding resistance value by a phase difference method for low-frequency heating, the steps of which include:

[0032] Step 1), initial state: do not change the short circuit of the low-voltage winding, add a low-frequency AC voltage to the high-voltage side winding, ignore the leakage reactance of the transformer, and measure the phase differenc...

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Abstract

The invention discloses a low-frequency heating method for calculating winding resistance value and accurately obtaining temperature rise through a phase difference method, and belongs to the field of environmental protection and energy conservation. According to the method, a circuit is firstly simplified and equivalently processed, then a low-voltage side winding and a high-voltage side winding are obtained through formula calculation, then the average temperature of all the windings is calculated through a metal material resistance and temperature relation formula, temperature rise feedback is provided for a low-frequency heating device, and therefore the drying degree of the transformer winding is accurately controlled. The technical problems that in the prior art, the temperature cannot be accurately measured, and the temperature of each winding cannot be accurately controlled are solved.

Description

technical field [0001] The invention belongs to the field of environmental protection and energy saving, and particularly relates to a method for accurately obtaining temperature rise by calculating the winding resistance value by using the phase difference method for low-frequency heating. Background technique [0002] Transformer is an important power transmission and transformation equipment, and good insulation is an important factor to ensure its safe operation. The transformer body is mainly composed of transformer winding coils, iron cores, insulating materials and clips. The insulating material is distributed on the iron core and the coil, which is used to improve the insulation level of the transformer, and improve the insulation withstand voltage and resistance to electrical breakdown. The general structure of the transformer body and the distribution of insulating materials used are as follows: the iron core is in the innermost layer, and the low-voltage windings...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/00G06F30/20G06F119/08
CPCG01K7/00G06F30/20G06F2119/08
Inventor 吕博张欣刘帅高健张晓东马晓婷董超刘洋李伟章海庭马云飞孙丽曲通
Owner 沈阳中科瑞达科技有限公司
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