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A buried oil cooling system for an oil-immersed transformer

An oil-immersed transformer and oil-cooling system technology, applied in the field of transformer cooling, can solve the problems of difficult cleaning, affecting production, reducing equipment life, etc., and achieving the effect of avoiding excessive temperature rise

Active Publication Date: 2017-12-22
上海丰蓓生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The cooling system of existing transformers is often located on the bottom surface, which is greatly affected by the ambient temperature. Especially in the north where the temperature difference between day and night is large and the temperature difference between seasons is also large, the outdoor cooling system often requires more people to take care of it. It also needs to invest a lot of manpower and material resources. In addition, due to the large temperature difference, the service life of the equipment is seriously reduced, and the maintenance cost is increased.

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  • A buried oil cooling system for an oil-immersed transformer

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specific Embodiment 1

[0036] like figure 1 As shown, the buried oil cooling system of an oil-immersed transformer of the present invention includes a transformer 1 located on the ground and an underground cooling system, the cooling system is located at least one meter below the ground, and the cooling system includes oil cooling Circulation system, water cooling circulation system and air cooling circulation system;

[0037] The oil cooling circulation system includes a cooling oil pipe 13 and an oil pump. The oil pipe communicates with the transformer 1 through the oil pump to form a circulating oil cooling passage; the inlet and outlet of the oil cooling system communicate with the oil inlet 12 and the oil outlet 11 of the transformer 1 respectively. The transformer 1 Both the oil inlet 12 and the oil outlet 11 are located at the bottom or the lower side wall of the transformer 1. The cooling oil pipe 13 is formed to include several cooling branch pipes forming a network. The two ends of the coo...

Embodiment 1

[0045] The installation method of the buried oil cooling system of a kind of oil-immersed transformer in embodiment 1:

[0046] (1) Excavate a deep pit with a length, width and height of 13m*15m*3.5m, fill and compact the bottom of the pit;

[0047] (2), set up a basement on one side of the deep pit, and set up a water tower in the basement;

[0048] (3) Lay a first powder layer with a particle size of less than 10 mesh and a thickness of 3-3.5cm at the bottom of the deep pit, and use a steel pipe with an inner diameter of 3-5cm to build an S-shaped return water above the first powder layer channel, and then lay a second powder layer with a particle size of less than 10 mesh and a thickness of 4-4.5cm above the return channel; spread the second powder layer and use a rammed earth device with a pressure of 100-150kpa to place the second powder layer compaction;

[0049] (4) On the top of the second powder layer, use fine stones with an outer diameter of 1-2.5cm to lay a 15-20...

specific Embodiment 3

[0058] The starting method of the buried oil cooling system of a kind of oil-immersed transformer in embodiment 1 or embodiment 2:

[0059] (1) Start some fans to circulate cold air in the return air passage, air intake passage and basement;

[0060] (2) Start the oil pump to circulate the transformer oil in the cooling oil pipe and transformer;

[0061] (3) When the step-up voltage of the transformer is half of the normal use, wait for the temperature of the transformer oil to rise to its normal use temperature value, and start all the fans;

[0062] (4) When the transformer continues to adjust the gear and boost the voltage to three quarters of the normal use, start some water pumps to make the cooling water circulate among the water inlet channel, return water channel and water tower;

[0063] (5) Adjust the voltage of the transformer to the voltage value for normal use, observe the value of the oil temperature of the transformer; start or close part or all of the water pu...

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Abstract

The invention relates to the field of transformer cooling, in particular to a buried oil cooling system of an oil immersed transformer. The buried oil cooling system comprises a transformer arranged on the ground and a cooling system arranged under the ground, wherein the cooling system comprises an oil cooling circulation system, a water cooling circulation system and a wind cooling circulation system, the oil cooling circulation system comprises a cooling oil pipe and an oil pump, the oil pipe and the transformer are communicated through the oil pump to form a circulated oil cooling channel, the wind cooling circulation system comprises a circulation cooling channel formed by a fan, an air inlet channel, an air return channel and a basement, and the water cooling circulation system comprises a circulation cooling channel formed by a water pump, a water tower, a water inlet channel and a water return channel. In the buried oil cooling system, the characteristics of low temperature and temperature constancy of the earth are effectively utilized, the influence by day and night temperature difference is less than 10%, and the influence by seasons is low; the earth is fully and effectively utilized as a cooling source for cooling; and a vegetable layer serves as a thermal insulation layer, and through reasonable matching, the problem of too high raised temperature of a surface layer is effectively prevented.

Description

technical field [0001] The invention relates to the field of transformer cooling, in particular to an underground oil cooling system of an oil-immersed transformer. Background technique [0002] Oil-immersed transformer: also known as oil-type transformer. It is a structural type of transformer, that is, the coil of the transformer is immersed in oil. Due to the need for fire protection, oil-immersed transformers are generally installed in a separate transformer room or outdoors. The fully oil-filled sealing type is used, and the corrugated oil tank shell can adapt to the expansion of oil with its own elasticity. It has the characteristics of large volume, low cost, environmental protection, energy saving, durability, simple maintenance, good heat dissipation, strong overload capacity and wide adaptability to the environment. Oil-immersed transformers rely on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air-cooled, oil-immersed water-cooled a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/12H01F27/08
Inventor 肖勇
Owner 上海丰蓓生物科技有限公司
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