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Online oil filtering device with intelligent frequency conversion function for main transformer load switch and method

An oil filtering device and a functional technology, which is applied in the field of online oil filtering device of main transformer on-load switch, can solve the problems of on-load switch burning and tripping of main transformer, heavy-watt action of Buchholz relay, and inability to automatically control operation, etc. The effect of running time, reducing the number of power outages, and reducing the maintenance workload

Active Publication Date: 2014-04-23
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The on-load switch contact is installed in an oil storage tank with oil inlet and outlet pipes and filled with transformer oil. When the switch is live, the high-temperature arc caused by the on-load switch contact will rapidly heat the transformer oil around the contact and cause it to decompose. Free carbon particles, these solid particles are suspended in the oil, if not removed in time, it may cause serious accidents such as on-load switch burning and main transformer tripping
The traditional on-line oil filter device with on-load switch cannot automatically control the operation according to the presence of free carbon or other impurity particles in the oil. The motor is easily damaged, and the oil pump runs at high speed for a long time. Even if a small leakage occurs in the oil flow system, air bubbles may be generated, which may cause serious consequences such as tripping of the main transformer due to the heavy tile action of the on-load switch gas relay.

Method used

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  • Online oil filtering device with intelligent frequency conversion function for main transformer load switch and method
  • Online oil filtering device with intelligent frequency conversion function for main transformer load switch and method
  • Online oil filtering device with intelligent frequency conversion function for main transformer load switch and method

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Embodiment Construction

[0026] Such as Figure 1~11 As shown, a main transformer on-load switch oil filter device with intelligent frequency conversion function includes an oil pump driven by a frequency conversion motor and a particle density detector for detecting the transformer oil in the oil storage tank. The frequency conversion motor is composed of A frequency converter is connected with a motor, the oil inlet of the oil pump is connected with an oil inlet pipe that goes deep into the oil storage barrel, the oil inlet pipe is provided with an oil inlet valve, and the oil outlet of the oil pump is connected with a The oil outlet pipe of the oil drum, the oil outlet pipe is provided with an oil outlet valve, a filter tank and an electric contact pressure gauge, and the electric contact pressure gauge is connected to a frequency conversion motor and a pressure alarm, and the frequency converter of the frequency conversion motor and the particle density The detector is electrically connected to th...

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Abstract

The invention relates to an online oil filtering device with an intelligent frequency conversion function for a main transformer load switch and a method. The device comprises an oil pump driven by using a variable-frequency motor, and a particle density detector for detecting transformer oil in an oil storage bucket, wherein the oil inlet of the oil pump is connected with an oil inlet pipe which goes deep into the oil storage bucket; the oil inlet pipe is provided with an oil inlet valve; the oil outlet of the oil pump is connected with an oil outlet pipe leading to the oil storage bucket; the oil outlet pipe is provided with an oil outlet valve, a filtering tank and an electric contact pressure gauge; the electric contact pressure gauge is connected to the variable-frequency motor and a pressure alarm; a frequency converter of the variable-frequency motor and the particle density detector are electrically connected to a control module. By adopting the online oil filtering device, the rotating speed and running time of the oil pump of the load switch online oil filtering device can be lowered and shortened greatly, the working efficiency is increased, and the maintenance workload is lowered. In particular, the times of power failures caused by overhauling of failure of the load switch online oil filtering device in the main transformer can be reduced greatly.

Description

technical field [0001] The invention relates to the field of on-line oil filtering control of an on-load switch, in particular to an on-line oil filtering device and method for an on-load switch of a main transformer with an intelligent frequency conversion function. Background technique [0002] During the operation of the main transformer, when the load changes to a certain range, it is necessary to use the on-load switch to switch the secondary winding taps of the main transformer without power failure to adapt to the change of the load. The on-load switch contact is installed in an oil storage tank with oil inlet and outlet pipes and filled with transformer oil. When the switch is live, the high-temperature arc caused by the on-load switch contact will rapidly heat the transformer oil around the contact and cause it to decompose. Free carbon particles, these solid particles are suspended in the oil, if not removed in time, it may lead to serious accidents such as burning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/14G08B13/20H01F29/04B01D35/02
Inventor 林晓铭林舒妍宋仕江郑孝章
Owner STATE GRID CORP OF CHINA
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