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Gas taking method for transformer gas protection action and detection device thereof

A gas protection and detection device technology, applied in the field of transformers, can solve problems such as unfavorable power grid safe operation, long discrimination time, transformer power outage, etc., and achieve the effect of reducing the risk of gas intake and avoiding the impact of gas protection

Active Publication Date: 2022-05-03
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, to sample the gas, it is often necessary to completely cut off the power of the transformer, and the gas needs to be sent to a professional team for test analysis. Therefore, it takes a long time to judge the operation of the gas protection, and it is necessary to cut off the power of the transformer for a long time, which is not conducive to the protection of the power grid. safe operation

Method used

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  • Gas taking method for transformer gas protection action and detection device thereof

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Effect test

Embodiment 1

[0044] The present embodiment provides a gas extraction method for transformer gas protection action, which specifically includes the following gas extraction steps:

[0045] S1: When the transformer is in normal operation and the Buchholz relay 1 does not act, adjust the inlet valve 10 on the gas collection container 4 for collecting the generated gas and the oil inlet valve 9 on the oil collection container 2 for collecting oil to be In the closed state, set the gas collection container 4 and the oil collection container 2 to a vacuum state;

[0046] It should be noted that setting the gas collecting container 4 and the oil collecting container 2 to a vacuum state is convenient for automatically collecting and producing gas and oil through the pressure difference, even if the pressure inside the transformer is not enough to discharge all the gas, with the help of the oil collecting container 2, In the vacuum state inside the gas collecting container 4, all the generated gas ...

Embodiment 2

[0072] like figure 1 As shown, the present invention also provides a transformer gas protection action detection device, which adopts the gas extraction method in Embodiment 1 for detection and use, and the detection device includes a gas relay 1, an oil collecting container 2, a gas collecting container 4 and a control device;

[0073] The gas relay 1 is installed on the connecting pipe 8 between the top of the transformer and the oil pillow, and the oil collecting container 2 is installed on the bottom surface of the transformer. The gas relay 1 and the oil collecting container 2 are connected through the connecting pipe 8. There is an upwardly inclined angle between the connecting pipe 8, and the gas collecting container 4 is communicated with the branch pipe 13;

[0074] The gas collection container 4 is provided with an exhaust hole 5 and a gas detection interface 7, and the gas detection interface 7 is communicated with the gas detector 12; the oil collection container 2...

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Abstract

The invention relates to the technical field of transformers, in particular to a gas taking method for transformer gas protection action and a detection device.The gas taking method comprises the following gas taking steps that when a gas relay does not act, a gas inlet valve and an oil inlet valve are closed, and a gas collecting container and an oil collecting container are set to be in a vacuum state; setting margin time from closing to opening of the air inlet valve and the oil inlet valve; after the gas relay acts, a set margin time is started, and generated gas and oil enter a gas collecting container and an oil collecting container respectively; closing the gas inlet valve and the oil inlet valve after the collection of the generated gas and oil is completed; opening a gas detection interface to detect the generated gas, and judging the fault condition; an exhaust hole and an oil discharge hole are opened, and gas and oil are discharged; the vacuum states of the gas collecting container and the oil collecting container are reset, and operation is recovered; according to the invention, the problems of long detection time and long power failure time of the existing gas protection action are solved, and the detection efficiency and the judgment accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of transformers, and more particularly, to a gas taking method and a detection device for the gas protection action of a transformer. Background technique [0002] Gas protection is a protection method that reflects the electrical fault inside the transformer. When an electrical fault occurs inside the transformer, the oil will be decomposed to generate gas. When the gas converges on the top of the gas relay, a certain pressure will be generated, which will trigger the light gas protection action. It will also cause the oil flow to surge rapidly, impact the action of the gas relay, turn on the control loop, and cause heavy gas protection. [0003] After the gas protection action of the transformer occurs, no matter the heavy gas protection or the light gas protection, gas will be generated, so the staff can judge the authenticity of the fault by observing whether there is gas in the gas relay and sampling an...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01R31/00G01N33/00
CPCG01N1/2202G01N33/0004G01R31/00
Inventor 刘志勇严司玮
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID