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Oil-immersed transformer online oil change device and system

An oil-immersed transformer and oil system technology, applied in the field of electric power, can solve problems such as poor oil change effect, no solution proposed, loss of meaning of oil change, etc., and achieve the effect of avoiding oxidation

Inactive Publication Date: 2017-12-29
JUANCHENG POWER SUPPLY CO STATE GRID SHANDONG ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of the above scheme is that during the oil change process, new oil and old oil will be mixed, and the concentration of impurities such as fibers, acids and carbon particles contained in the old oil is higher than that of the new oil, which will spontaneously carry out a diffusion movement, causing the new oil to Contaminated by old oil, it loses the meaning of changing oil
[0004] Aiming at the problem of poor oil change effect in the current online oil change technology, no effective solution has been proposed yet

Method used

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  • Oil-immersed transformer online oil change device and system
  • Oil-immersed transformer online oil change device and system
  • Oil-immersed transformer online oil change device and system

Examples

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Effect test

Embodiment 1

[0031] Embodiment 1 of the present invention provides an oil-immersed transformer online oil change device, which performs oil change operations on running transformers, see figure 1 The schematic diagram of the structure of the oil-immersed transformer on-line oil change device shown, the on-line oil change device includes: a first vacuum pump 101, a second vacuum pump 102, a new oil tank 103, a waste oil tank 104, an inert gas tank 105, and a four-way connector 106 and tee joint 107.

[0032] Among them, the new oil tank 103 is used to store new transformer oil, preferably airtight storage, to keep the transformer oil from being oxidized by the air; the waste oil tank 104 is used to store the waste oil flowing out of the transformer in the oil change operation; the inert gas tank 105 is used for Store inert gas. Considering that the gas used as the medium before and after oil change may pollute the air, the inert gas tank 105 includes an independent first air chamber 108 an...

Embodiment 2

[0040] Embodiment 2 provides an online oil change system for an oil-immersed transformer, including the online oil change device provided in Embodiment 1 above, and the online oil change device is connected to an oil-immersed transformer requiring oil change.

[0041] see figure 2 The schematic diagram of the external structure of the oil-immersed transformer is shown, wherein the oil-immersed transformer includes a transformer main body 201 and an oil conservator 110 communicating with it, an exhaust pipe 114 and an oil discharge pipe 118, and the oil conservator 110 is also provided with an oil injection pipe.

[0042] see image 3 The shown schematic cross-sectional structure of the oil-immersed transformer shows that an iron core 301 is provided in the main body 201 of the transformer. In this embodiment, an axial double-split winding is used as an example. The actual transformer may be of other types. The iron core 301 includes three iron core columns, and each iron cor...

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Abstract

The invention provides an online oil-changing apparatus and system for an oil-immersed transformer, and relates to the electric power technical field. The online oil-changing apparatus comprises a first vacuum pump, a second vacuum pump, a new oil tank, a used oil tank, an inert gas tank, a four-way connector and a tee-joint connector, wherein the tee-joint connector is connected with an exhausting pipe, a second air chamber and the second vacuum pump of the oil-immersed transformer separately through a pipeline; a third air valve is arranged between the second vacuum pump and the tee-joint connector; a fourth air valve is arranged between the second air chamber and the tee-joint connector; a fifth air valve is arranged between the air exhausting pipe and the tee-joint connector; and the used oil tank is connected with an oil exhausting pipe of the oil-immersed transformer. By adoption of the online oil-changing apparatus and system, physical isolation of new oil and used oil can be realized; and it is ensured that the assembly and the newly-added transformer oil in the transformer oil tank are not in contact with air during online oil-changing of the oil-immersed transformer, so that oxidization to the internal assembly and the transformer oil of the transformer is avoided.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an online oil change device and system for an oil-immersed transformer. Background technique [0002] Oil-immersed transformer is a structural type of transformer. Its coils are soaked in insulating oil. The insulating oil has the characteristics of high dielectric strength, large specific heat and good thermal conductivity, which can play a good role in insulation, heat dissipation and arc suppression. . Due to the long running time of the transformer, the transformer oil will gradually age and deteriorate under the action of long-term working voltage, operating overvoltage and lightning overvoltage, and the oil needs to be changed after the equipment is overhauled. [0003] The online oil change scheme in the prior art is to use an oil change car to change the oil of the transformer in operation, wherein the oil change car is connected to the lower end of the transform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/14
CPCH01F27/14
Inventor 李银果孙文彦赵凯华刘兰玉苏兆霞王瑾瑾张伟杨哲
Owner JUANCHENG POWER SUPPLY CO STATE GRID SHANDONG ELECTRIC POWER CO
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