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A Method for Evaluating the Efficiency of Oil-immersed Power Transformer Cooler

A technology for power transformers and transformers, applied in the fields of transformer/inductor cooling, instruments, electrical digital data processing, etc., can solve problems such as insufficient efficiency of transformer coolers, and achieve the effect of easy control and solving of insufficient efficiency.

Active Publication Date: 2017-09-26
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the above-mentioned problems of the prior art, to provide a transformer capable of realizing cooler efficiency calculation to grasp the load capacity of the transformer to solve the problem of insufficient efficiency of the transformer cooler, suitable for installing a cooler transformer, And it can also provide a basis for evaluating the efficiency of oil-immersed power transformer coolers for estimating the temperature rise of the transformer top layer

Method used

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  • A Method for Evaluating the Efficiency of Oil-immersed Power Transformer Cooler
  • A Method for Evaluating the Efficiency of Oil-immersed Power Transformer Cooler
  • A Method for Evaluating the Efficiency of Oil-immersed Power Transformer Cooler

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Embodiment Construction

[0031] Such as figure 1 As shown, the steps of the method for evaluating the efficiency of the oil-immersed power transformer cooler in this embodiment include:

[0032] 1) Calculate the average load loss of the transformer to be evaluated during the specified time period In this embodiment, the time period starting at time 0 and ending at time r is used as the designated time period;

[0033] 2) The average load loss Add the nameplate no-load loss of the transformer to be evaluated p 0 , Get the average total power loss of the transformer to be evaluated in the specified time period (which is );

[0034] 3) Calculate the average remaining power of the transformer to be evaluated during the specified time period

[0035] 4) Assuming the cooler efficiency η of the transformer to be evaluated, calculate the average cooling power of the cooler of the transformer to be evaluated in the specified time period according to the assumed cooler efficiency η

[0036] 5) According to the av...

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Abstract

The invention discloses a method for evaluating the efficiency of an oil-immersed power transformer cooler. The steps include: calculating the average load loss of the transformer to be evaluated in a specified time period, and adding the average load loss to the nameplate no-load loss to obtain the average total power loss; Calculate the average residual power of the transformer to be evaluated in the specified time period; assuming the efficiency of the cooler of the transformer to be evaluated, calculate the average cooling power of the cooler of the transformer to be evaluated in the specified time period, and subtract the average cooling power from the average total loss power Equal to the energy balance relationship of the average residual power, subtract the average residual power from the average total power loss and divide it by the average cooling power to calculate and reverse the cooler efficiency of the transformer to be evaluated. The invention can realize the calculation of the efficiency of the cooler to grasp the load capacity of the transformer to solve the problem of insufficient efficiency of the transformer cooler, is suitable for the transformer installed with the cooler, and can also provide a basis for estimating the temperature rise of the transformer top layer oil.

Description

Technical field [0001] The invention relates to an efficiency optimization technology of an oil-immersed power transformer, in particular to a method for evaluating the efficiency of an oil-immersed power transformer cooler. Background technique [0002] The transformer manufacturer uses the factory calculation method to calculate the loss, oil temperature rise, and winding temperature rise of oil-immersed power transformers. Based on the calculation results, a cooling system with a certain capacity is configured to meet the cooling needs of oil-immersed power transformers. However, the oil-immersed power transformer in the power grid will inevitably cause a decrease in the efficiency of the cooling system due to factors such as pollution and dust after operating for a period of time. If cleaning or maintenance is not performed in time, it may cause oil immersion. The temperature rise of the top oil of the power transformer exceeds the allowable value, which affects the load capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00H01F27/08
Inventor 刘赟刘兴文叶会生万勋段建家
Owner STATE GRID CORP OF CHINA
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