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Method for slowing down aging of solid insulation of oil-paper insulating transformer

A technology of solid insulation and oil-paper insulation, applied in the direction of transformer/inductor coil/winding/connection, instrument, non-electric variable control, etc., can solve the problem of rough and simple control principle, lack of monitoring and reflection of transformer winding hot spot temperature, and uncontrollable Accelerated Aging of Transformer Solid Insulation and Other Problems

Active Publication Date: 2014-02-19
甘景福
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  • Application Information

AI Technical Summary

Problems solved by technology

These control principles are relatively rough and simple, and only consider the influence of transformer oil temperature on the aging of transformer solid insulation during transformer operation, but lack of monitoring and reflection of transformer winding hot spot temperature, so that it is impossible to control the dynamic movement of water between oil and paper. Accelerated Aging of Solid Insulation

Method used

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  • Method for slowing down aging of solid insulation of oil-paper insulating transformer
  • Method for slowing down aging of solid insulation of oil-paper insulating transformer
  • Method for slowing down aging of solid insulation of oil-paper insulating transformer

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Embodiment Construction

[0049] Hereinafter, the present invention will be further described through embodiments in conjunction with the drawings.

[0050] Use the actual operating transformer to establish a transformer winding hot spot temperature measurement, calculation and cooling control system. figure 1 Shown. In this system, the control method proposed by the present invention operates in the following steps:

[0051] The first step is to use the actual operating transformer to establish a transformer winding hot spot temperature measurement, calculation and cooling control system, as attached figure 1 Shown; the transformer cooling system control device 5, using the temperature measurement module 7 to obtain the top oil temperature sensor 3 provided by the transformer top oil, the temperature is used to calculate the transformer winding temperature; using the tap position of the voltage regulating device and the fan status acquisition module 6 to obtain the transformer On-load voltage regulating de...

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Abstract

The invention relates to a method for slowing down the aging of solid insulation of an oil-paper insulating transformer, which is used for slowing down the aging of solid insulation of the transformer and belongs to the technical field of insulation of power transformer. The method comprises the following steps of: (1) setting a control target value T + delta T of a constant value of winding hot spot temperature of the transformer; (2) measuring the winding hot spot temperature in the transformer operation; (3) according to the winding hot spot temperature of the transformer obtained through measurement, calculating the changing rate D / Dt of the winding hot spot temperature; and (4) comparing the winding hot spot temperature of the transformer obtained through measurement with the preset control target value T + delta T of the constant value of the winding hot spot temperature of the transformer, combining with the changing rate D / Dt of the winding hot spot temperature of the transformer obtained through calculation, and determining a cooling control system to input or output a cooling fan. The method controls a heat-removal system of the transformer and pursues the approximate constancy of the winding hot spot temperature of the transformer to reduce the relative motion of moisture between the oil-paper insulation of the transformer, so that the aging speed of the solid insulation of the transformer can be effectively slowed down.

Description

Technical field [0001] The invention relates to a method for slowing down the solid insulation aging of an oil-paper insulated transformer, which is used for slowing down the solid insulation aging of the transformer and belongs to the technical field of power transformer insulation. Background technique [0002] According to various studies and statistics at home and abroad, insulation failure in oil-immersed transformers is an important cause of transformer damage. The insulation system in oil-immersed transformers generally uses oil-paper insulation. The service life of oil-paper insulated transformer is basically determined by the insulation system, which consists of transformer oil and insulation paper. Among them, even if the insulating oil is used for 30 years, the insulation breakdown performance will only decrease by about 10%. Moreover, during the operation of the transformer, maintenance personnel can also improve the insulation performance of the oil by purifying or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/20H01F27/32
Inventor 甘景福
Owner 甘景福
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