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Apparatus and method for cooling power transformers

A technology of power transformers and transformers, applied in the field of transformers, can solve problems such as temperature rise of transformers, damage to transformers, insufficient cooling of oil, etc., and achieve the effect of large power capacity

Inactive Publication Date: 2003-01-08
TREXCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the outside conditions are very warm and humid, the temperature of the oil sump may rise, so the oil cannot be cooled sufficiently, while the temperature inside the transformer continues to rise until it damages the working parts of the transformer

Method used

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  • Apparatus and method for cooling power transformers
  • Apparatus and method for cooling power transformers
  • Apparatus and method for cooling power transformers

Examples

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Embodiment Construction

[0029] Detailed description of the preferred embodiment

[0030] To facilitate an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings, and specific language will be used to describe the foregoing embodiments. However, it should be understood that no limitation of the scope of the invention is thereby intended. The invention includes any modifications and adaptations in the described apparatus and described methods, and other applications of the principles of the invention which would normally occur to those skilled in the art to which the invention pertains. For example, while the described embodiment is a retrofit to an existing system, the cooling system of the present invention may be incorporated into the design of a newly constructed power transformer bank.

[0031] now refer to figure 2 , where selected portions of one embodiment of the transformer cooling system 27 of the present invention are sch...

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PUM

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Abstract

A system (27) for reducing the temperature of cooling oil for a power transformer (12) includes a heat exchanger (44) interposed in the cooling oil system. The heat exchanger (44) relies upon a liquid-to-liquid exchange of heat from the heated oil to a coolant flowing through the heat exchanger. In one embodiment, the coolant provided to the heat exchanger is obtained from an absorption chiller (65). Heat energy is provided to the chiller (65) from a heat storage device (80). In a specific embodiment, the heat storage source (80) can be a phase change material device. In a preferred cooling system, a programmable controller (55) determines the activation and operation of the system. The controller (55) can sense transformer or cooling oil temperature to trigger activation. In a preferred embodiment, the controller (55) compares a current temperature history against a temperature profile to anticipate increased cooling requirements. In certain embodiment, excess, off-peak or waste heat from the transformer (12) itself is provided to the heat storage device (80) or to the phase change heat exchanger.

Description

Background of the invention [0001] The present invention relates to transformers, and more particularly to an apparatus and method for cooling power transformers during use. [0002] Power transformers are used in power supply systems to transform, transmit and distribute electricity for consumption by end users. Transformers are specified by the operating voltage on the high and low sides and are sized according to the volts and ampacity delivered. For example, large transformers are used as transmission transformers, stepping up the voltage along the supply lines, and as distribution transformers, stepping down the voltage for distribution. [0003] A disadvantage of existing transformers is that they are susceptible to operational problems related to high operating temperatures both externally and internally of the transformer. Generally, in order to maintain the rated capacity and ensure the service life of the transformer and its components, the maximum temperature insi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/16F25B15/00F25B25/00H01F27/10H01F27/12
CPCH01F27/12Y02B30/62F25B2400/24H01F27/10F25B25/005F25B2333/007F25B15/00Y02A30/27
Inventor 罗伯特·L·朗加德纳小安东尼·M·威斯尼斯基
Owner TREXCO
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