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Content measurement method for trace amount of alcohol or ketone substance in transformer insulation oil

A technology for transformer insulating oil and substance content, which is applied to the determination of ketone substance content and the field of trace alcohols in transformer insulating oil to achieve the effects of optimizing test conditions, expanding the measurement range, and improving measurement accuracy

Active Publication Date: 2019-08-02
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

[0006] In view of this, the present invention aims at the present situation of aging evaluation of cellulose insulating materials in existing transformers, and proposes a set of trace alcohols and ketones content in transformer insulating oil with better repeatability and stability, which can be used in engineering applications. assay method designed to address the existing

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  • Content measurement method for trace amount of alcohol or ketone substance in transformer insulation oil
  • Content measurement method for trace amount of alcohol or ketone substance in transformer insulation oil
  • Content measurement method for trace amount of alcohol or ketone substance in transformer insulation oil

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[0047] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0048] refer to figure 1 , the present invention proposes a method for measuring the content of trace alcohols and ketones in insulating oil, comprising:

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Abstract

The invention provides a content measurement method for a trace amount of alcohol or ketone substance in transformer insulation oil. The content measurement method comprises the steps of adding a standard addition liquid of a to-be-detected alcohol and / or ketone substance into to-be-measured transformer insulation oil by a standard addition method, and preparing a series of standard samples with different addition concentrations; performing separation detection by a headspace sampling method and by a gas chromatography-FID detection method or a gas chromatography-mass spectrum combination method, and acquiring chromatogram peak area of a corresponding to-be-measured alcohol and / or ketone substance in the samples; and building a standard curve according to the chromatogram peak area and theaddition concentration of the standard samples, performing fitting to obtain a linear equation, and calculating the content of the to-be-measured alcohol and / or ketone substance in a substrate solution according to the linear equation. By the measurement method, test of various types of alcohol or ketone substances can be achieved by sampling in one time, the content measurement method is good inrepeatability and stability, the measurement accuracy is improved, and the measurement range is expanded.

Description

technical field [0001] The invention relates to the technical field of high-voltage insulation, in particular to a method for determining the content of trace alcohols and ketones in transformer insulating oil. Background technique [0002] Aging assessment of cellulosic insulation in transformers is usually carried out by indirect measurement of chemical markers in the insulating oil. Furan compounds were first identified as indicators of paper aging in the early 1980s. Among them, 2-furyl aldehyde (2-FAL) is widely used because of its higher concentration in oil and better stability. However, the detection of furan compounds, that is, furfural, also has many defects, such as absorption by insulating paper, chemical instability and so on. [0003] Compared with furan compounds, methanol has a relatively short history of being proposed as an indicator of paper aging. Methanol was first proposed as an indicator of paper aging around 2007. Jalbert et al. used headspace gas...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N30/06
CPCG01N30/88G01N30/06
Inventor 王健一陆家榆周远翔张书琦程涣超李金忠张灵张云霄白松王帅陈雷汪可刘雪丽遇心如孙建涛赵志刚汤浩赵晓宇赵晓林王琳王兆伟黄欣
Owner CHINA ELECTRIC POWER RES INST
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