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

A solid insulation, oil-paper insulation technology, applied in the direction of transformer/inductor coil/winding/connection, instrument, non-electrical variable control, etc., can solve the rough and simple control principle, the lack of monitoring and reflection of the hot spot temperature of the transformer winding, and the uncontrollable Problems such as accelerated aging of transformer solid insulation

Active Publication Date: 2012-10-10
甘景福
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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] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0050] Using the transformer in actual operation, establish a transformer winding hot spot temperature measurement, calculation and cooling control system as attached figure 1 shown. In this system, the control method proposed by the present invention operates according to 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 shown in the attached figure 1 As shown; the transformer cooling system control device 5 uses the temperature measurement module 7 to obtain the top oil of the transformer provided by the top oil temperature sensor 3, and the temperature is used to calculate the temperature of the transformer winding; the tap position of the voltage regulating device and the fan state acquisition...

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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 aging of the solid insulation of an oil-paper insulation transformer, which is used for slowing down the aging of the solid insulation of the transformer and belongs to the technical field of power transformer insulation. Background technique [0002] According to various researches and statistical data 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 an oil-paper insulated transformer basically depends on the insulation system, which consists of transformer oil and insulating paper. Among them, even if the insulating oil has been used for 30 years, the decline in insulation breakdown performance is only about 10%. Moreover, during the operation of the transformer, maintenance personnel can also improve the insulation performan...

Claims

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Application Information

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IPC IPC(8): G05D23/20H01F27/32
Inventor 甘景福
Owner 甘景福
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