Method for cooling large oil immersed type rectifier transformer under abnormal heated condition

A rectifier transformer, abnormal heating technology, applied in the direction of transformer/inductor cooling, temperature control by electric method, etc., can solve problems such as overload temperature rise, and achieve the effect of ensuring safe operation, convenient application and low investment

Inactive Publication Date: 2015-07-22
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a method for realizing abnormal heating and cooling of large oil-immersed rectifier transformers, so as to solve the problems of frequent overload and excessive temperature rise of large oil-immersed rectifier transformers in the prior art

Method used

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  • Method for cooling large oil immersed type rectifier transformer under abnormal heated condition
  • Method for cooling large oil immersed type rectifier transformer under abnormal heated condition
  • Method for cooling large oil immersed type rectifier transformer under abnormal heated condition

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Embodiment 1

[0035] Embodiment 1 provided by the present invention is an embodiment of an implementation device for a method for realizing abnormal heating and cooling of a large oil-immersed rectifier transformer provided by the present invention.

[0036] Such as figure 1 , figure 2 and image 3 Shown are respectively the top view, the front view and the left view of the large oil-immersed rectifier transformer provided by the present invention provided with an air cooling device, figure 2 and image 3 The front and left views in the figure 1 The A-direction and B-direction views in the top view of , by figure 1 , figure 2 and image 3 It can be seen that the air cooling device provided by the present invention includes a fan installed on the radiator of the transformer and a control circuit for a motor of the fan.

[0037] The number of fans can be set according to the actual operating conditions and parameters of the large oil-immersed rectifier transformer. Each fan is conne...

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Abstract

The invention belongs to the field of industrial and civil large oil immersed type rectifier transformers and provides a method for cooling a large oil immersed type rectifier transformer under the abnormal heated condition. A fan is installed on a radiator of the transformer, and the fan can be started manually or automatically. When the fan is started manually, a motor of the fan is powered on to enable the fan to work. When the fan is started automatically, the temperature value of a signal thermometer arranged inside the transformer and the load value of a current relay in a user control cabinet are measured in real time. When the measured temperature value of the signal thermometer arranged inside the transformer and the measured load current value of the current relay in the user control cabinet exceed set values, the motor of the fan is controlled to be powered on so that the fan can work to ventilate and cool the transformer. By installing the fan on the radiator of the transformer, automatic starting and manual starting can be selected, circuit structure is simple and convenient to use, investment is low, adjustment is easy, and using is convenient.

Description

technical field [0001] The invention belongs to the field of industrial and civil large-scale oil-immersed rectifier transformers, and in particular relates to a method for realizing abnormal heating and cooling of large-scale oil-immersed rectifier transformers. Background technique [0002] The load of the large oil-immersed rectifier transformer is a large-capacity frequency conversion rectifier + large motor. The load is generally a periodic shock load. Since the frequency conversion rectifier is a non-sinusoidal power receiving device for the grid, even if the grid supply voltage is an ideal sine wave, due to the one-way conduction of the rectifier tube on and off, the current drawn by the rectifier from the grid is also a non-sinusoidal current waveform . This kind of harmonic current flows through various impedance components in the system including motors, transmission lines and transformers, which will inevitably produce non-sinusoidal voltage drops, which will po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/08G05D23/19
Inventor 陈敬成蔡璇包静张华
Owner WISDRI ENG & RES INC LTD
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