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A test method for characteristic gas release of transformer oil

A technology for transformer oil and characteristic gas is applied in the field of testing the characteristic gas release of transformer oil, which can solve the problems of complex dissolved gas analysis and substandard material quality.

Active Publication Date: 2022-05-10
江苏万标检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to factors such as thermal stress, some new oils have produced a large amount of gas due to quality reasons, especially hydrogen gas. In addition, some materials (iron core and winding materials, etc.) Conditions that can cause oils containing certain types of contaminants to produce some characteristic gases
These complicate the analysis of dissolved gases
Therefore, simply performing DGA analysis on oil in operation to carry out fault diagnosis has certain limitations

Method used

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  • A test method for characteristic gas release of transformer oil
  • A test method for characteristic gas release of transformer oil
  • A test method for characteristic gas release of transformer oil

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] 1. The main instruments and auxiliary materials of the test

[0018] (1) Instrument

[0019] ZF-301 Plus A gas chromatograph (Henan Zhongfen Instrument Co., Ltd.), fully automatic multi-function oscillator (Shandong Zhonghui Instrument Co., Ltd.), FDQ2501 explosion-proof oven (Changsha Fulande Experimental Analysis Instrument Co., Ltd.)

[0020] (1.1) Test gas

[0021] High-purity nitrogen (99.999%), GH-300 high-purity hydrogen generator (Beijing Zhongxing Huili Technology Development Co., Ltd.), GA-2000A low-noise air pump (Beijing Zhongxing Huili Technology Development Co., Ltd.), standard mixed gas (Nanjing Tianze Gas Co., Ltd.)

[0022] (2) Experimental method

[0023] (2.2) Exploration of the thermal stability of new oil itself

[0024] Sampling according to GB4756 sampling method.

[0025] For the sample taken, divide it into two parts in parallel and put them in clean and dry brown glass bottles respectively, and record them as A1 and B1 (about 1L each). The...

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Abstract

The invention discloses a method for testing the characteristic gas release of transformer oil, which simulates the use environment of transformer oil, that is, adopts two methods of direct temperature rise and temperature rise after immersing in materials for the insulating oil not added to the transformer, for a period of time Afterwards, by comparing the dissolved gas content in the insulating oil before and after the test, the thermal stability of the transformer oil itself and the influence of the material are judged, which broadens the thinking for transformer fault diagnosis.

Description

technical field [0001] The invention relates to the field of oil-filled transformers, in particular to a method for testing the characteristic gas release of transformer oil. Background technique [0002] For oil-immersed transformers, transformer oil is an insulating liquid filled between the transformer core and the shell, filling the gaps between various parts of the transformer, so that there is no air in the transformer shell, and the inter-layer and inter-turn contact of the transformer winding is strengthened. Dielectric strength plays a moisture-proof role in the insulation of transformer windings. In addition, the normal operating temperature of the transformer is 40°C, the highest temperature point is the upper oil temperature, and the iron core and winding of the transformer are suspended in the center of the oil tank. The temperature of the oil surface on the upper layer of the transformer in operation should not exceed 85°C and not exceed 95°C for a long time, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/28G01N30/02
CPCG01N33/2805G01N30/02
Inventor 常军朱建红孙栋
Owner 江苏万标检测有限公司