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Method and device for judging insulating oil fire hazard risk of oil-less equipment of transformer substation

A judging method and technology of judging device, which are applied in the direction of material electrochemical variables, material thermal development, material resistance, etc., can solve the problem that there is no fire hazard associated with aging, it is difficult to monitor insulating oil in substations, and no quantitative method is given. and other problems, to achieve the effect of facilitating qualitative and quantitative analysis, accurate fire hazard judgment, and improving the accuracy of judgment

Pending Publication Date: 2022-05-27
ANHUI XINLT POWER TECH CONSULTING +3
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of fire hazard, the most important source of danger for combustibles such as insulating oil, the current scientific research has only made some conclusions on the combustion characteristics of transformer oil. The literature "Effect of Initial Oil Temperature on Combustion Characteristics of Transformer Oil" published by the School of Emergency Management and Safety Engineering of China University of Mining and Technology (Beijing) and the Institute of Public Security of Tsinghua University does not link fire hazards with aging, nor does it give Accurate quantitative method to determine, especially the quantitative method for judging the fire hazard of insulating oil
The conventional quantitative method for judging the fire hazard needs to be supported by a large number of experiments and complex demonstrations, and it is difficult to apply to large-scale insulating oil monitoring in substations

Method used

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  • Method and device for judging insulating oil fire hazard risk of oil-less equipment of transformer substation
  • Method and device for judging insulating oil fire hazard risk of oil-less equipment of transformer substation
  • Method and device for judging insulating oil fire hazard risk of oil-less equipment of transformer substation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] like figure 1 As shown, a method for judging the fire risk of insulating oil of low-oil equipment in a substation, the method includes:

[0049] Step 1: Routine inspection and test of insulating oil in substations to obtain oil samples;

[0050] Step 2: carry out a routine aging test on the oil sample to obtain the volume resistivity ρv;

[0051] Step 3: Obtain the correlation critical value between the volume resistivity ρv and the fire hazard judgment index obtained from the previous experiment; the specific process is:

[0052] 1) A series of insulating oils with different aging degrees collected in substations were selected for relevant electrochemical performance tests, including various parameters and media required for routine tests of insulating oils in the standard "Test Procedures for Condition Maintenance of Power Transmission and Transformation Equipment" Dissipation factor, volume resistivity, acid value, breakdown voltage, etc.

[0053] 2) Conduct a con...

Embodiment 2

[0076] Based on Embodiment 1, Embodiment 2 of the present invention further provides a device for judging the fire risk of insulating oil for low-oil equipment in a substation, the device comprising:

[0077] The oil sample acquisition module is used to obtain oil samples for routine inspection and test of insulating oil in substations;

[0078] The volume resistivity acquisition module is used to carry out the routine aging test of the oil sample to obtain the volume resistivity ρv;

[0079] The associated critical value acquisition module is used to obtain the associated critical value between the volume resistivity ρv and the fire hazard judgment index obtained from the previous experiments;

[0080] The fire hazard judgment module is used to compare the volume resistivity value with the associated critical value to judge the fire hazard of insulating oil.

[0081] Specifically, the associated critical value obtaining module is further used for:

[0082] Select a series o...

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Abstract

The invention discloses a method and a device for judging the fire risk of insulating oil of oil-less equipment of a transformer substation. The method comprises the following steps: step 1, carrying out a routine inspection test on the insulating oil of the transformer substation to obtain an oil sample; 2, performing an aging routine test on the oil sample to obtain volume resistivity rho v; 3, obtaining a correlation critical value between the volume resistivity rho v and a fire hazard risk judgment index obtained by an early-stage experiment; 4, comparing the volume resistivity value with the correlation critical value, and judging the fire risk of the insulating oil; the method has the advantages that the method is easy to implement, can be applied to daily inspection, facilitates qualitative and quantitative analysis of fire safety of the oil-less equipment of the transformer substation, and provides guidance for safety design of the transformer substation.

Description

technical field [0001] The invention relates to the technical field of electrical fire prevention and control engineering, and more particularly to a method and a device for judging the fire risk of insulating oil of oil-less equipment in a substation. Background technique [0002] In recent years, with the development of energy technology, green new energy power has gradually replaced traditional fossil energy. With the increasing demand for electricity, the requirements for power grids have increased, and the scale of substations has gradually increased. The target development of large-capacity power transmission, and the transformer is the core equipment of the substation. The transformer oil in it is very large, and there is a great fire hazard. During the operation of the substation, the insulating oil is prone to aging. If an accident occurs, the transformer will be damaged. Major failures, especially fire accidents, can easily lead to paralysis of the power grid in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/06G01N27/26G01N25/20
CPCG01N27/06G01N27/26G01N25/20
Inventor 杨娴汪书苹伦志宜周勇张和平王海超祝现礼李昌豪
Owner ANHUI XINLT POWER TECH CONSULTING
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