CN102033214A - Method for judging insulation waxing of current transformer - Google Patents
Method for judging insulation waxing of current transformer Download PDFInfo
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- CN102033214A CN102033214A CN 201010514374 CN201010514374A CN102033214A CN 102033214 A CN102033214 A CN 102033214A CN 201010514374 CN201010514374 CN 201010514374 CN 201010514374 A CN201010514374 A CN 201010514374A CN 102033214 A CN102033214 A CN 102033214A
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Abstract
The invention provides a method for judging the insulation waxing of a current transformer, belonging to the technical field of chemical mechanical polishing methods and equipment of silicon wafers. The method comprises the following steps of: carrying out oil chromatographic analysis on the current transformer, analyzing and comparing the content of two characteristic gases, namely hydrogen gas and methane in the oil chromatographic analysis according to the current transformer insulation waxing degree judgment standard so as to judge the insulation waxing degree of the current transformer. The method provided by the invention is simple, feasible and convenient to operate, not only can accurately judge the insulation waxing degree of the current transformer, but also can accurately judge, monitor and repair the operating state of the current transformer in time so as to ensure the normal and safe operation of the current transformer. Thus, the working efficiency and the working quality of the current transformer are improved. The method is especially applicable to the judgment of the insulation waxing degree of current transformers of 110 KV and higher voltage class.
Description
Technical field
The present invention relates to the determination methods technical field of electrical equipment dielectric loss size, particularly a kind of decision method that is applied to the current transformer insulating wax degree of electric system judgement electric pressure.
Background technology
At present, domestic electric system diagnosis current transformer makes moist, shelf depreciation, dielectric loss defective such as overheated all adopt high-voltage test and oil colours spectrum analysis method.And the current transformer insulating waxization is not had clear and definite determination methods.Therefore the supervision and the maintenance of current transformer running status can not only be accurately and timely judged and be carried out in the judgement of insulating waxization, guarantee the normal safe operation of current transformer, have improved the work quality and the work efficiency of current transformer.This becomes a problem anxious to be solved in the actual production.
Summary of the invention
The purpose of this invention is to provide a kind of current transformer insulating wax decision method, this method is simple, easy to operate, can not only judge current transformer insulating wax degree more exactly, and can judge and carry out the supervision and the maintenance of current transformer running status timely and accurately, guarantee the normal safe operation of current transformer, help improving the work efficiency and the work quality of current transformer.Particularly suitable is used for the judgement of the current transformer insulating wax degree of 110kV and above electric pressure.
One of the present invention is achieved in that a kind of current transformer insulating wax decision method, it is characterized in that current transformer is carried out the oil chromatography analysis, the content size of two kinds of characteristic gas in the oil chromatography analysis is analyzed comparison with current transformer insulating wax degree criterion value, thereby judge the insulating wax degree of current transformer.
Described current transformer insulating wax decision method is characterized in that described two kinds of characteristic gas are hydrogen and methane.
Described content size with two kinds of characteristic gas in the oil chromatography analysis is analyzed relatively with current transformer insulating wax degree criterion value and is meant: when content value during greater than a certain setting, wax length is less than 100mm, think that promptly there is slight waxization in current transformer, should strengthen operating supervision; When content value during greater than another setting, wax length less than 900mm, thinks promptly that there is moderate waxization in current transformer greater than 100mm, should or, should adopt an effective measure and strengthen operating supervision, should actively carry out the equipment spare unit and prepare the replacing of selecting a good opportunity; When content value during greater than another setting again, wax length thinks promptly that greater than 900mm there is severe waxization in current transformer, should be out of service immediately, change.
The a certain setting of described criterion is meant: when hydrogen content is 1000-5000 μ L/L and methane 100-300 μ L/L, there is slight waxization in current transformer, should strengthen operating supervision; When hydrogen content is 5001-10000 μ L/L and methane 301-500 μ L/L, there is moderate waxization in current transformer, should adopt an effective measure and strengthen operating supervision, the replacing of selecting a good opportunity; When hydrogen content surpasses 10000 μ L/L and methane surpasses 500 μ L/L, there is severe waxization in current transformer, should be out of service immediately.
Described current transformer insulating wax degree criterion also can according to circumstances be subdivided into a plurality of grades.
The present invention has outstanding beneficial effect: it has solved for a long time that exist always and unsolved always problem in the prior art well, the inventive method is simple, easy to operate, not only can judge current transformer insulating wax degree more exactly, and can judge and carry out the supervision and the maintenance of current transformer running status timely and accurately, guarantee the normal safe operation of current transformer, help improving the work efficiency and the work quality of current transformer.The size of hydrogen, two kinds of characteristic gas content of methane can be judged current transformer insulating wax degree more exactly with clear and definite numerical quantization during the present invention analyzed by oil chromatography first in that setting scope.Particularly suitable is used for the judgement of the current transformer insulating wax degree of 110kV and above electric pressure.
Below in conjunction with one preferably embodiment be described further explanation, but not as a limitation of the invention.
Embodiment
This current transformer insulating wax decision method, be that current transformer is carried out the oil chromatography analysis, the content size of two kinds of characteristic gas in the oil chromatography analysis is analyzed comparison with current transformer insulating wax degree criterion value, thereby judge the insulating wax degree of current transformer.Two kinds of characteristic gas are hydrogen and methane.Described criterion is: when hydrogen content is 1000-5000 μ L/L and methane 100-300 μ L/L, there is slight waxization in current transformer, should strengthen operating supervision; When hydrogen content is 5001-10000 μ L/L and methane 301-500 μ L/L, there is moderate waxization in current transformer, should adopt an effective measure and strengthen operating supervision, the replacing of selecting a good opportunity; When hydrogen content surpasses 10000 μ L/L and methane surpasses 500 μ L/L, there is severe waxization in current transformer, should be out of service immediately.
Be example with three current transformers of electrical network below, carry out the explanation that current transformer insulating wax degree is judged by oil chromatography characteristic gas content size.
The insulating wax deciding degree is according to two kinds of characteristic gas content numerical values recited in the current transformer oil chromatography analysis data, judges the insulating wax degree.Two kinds of characteristic gas contain the size of numerical quantity in the oil chromatography analysis, have reflected current transformer insulating wax degree, are judged as slight, moderate and three kinds of states of severe, to take the corresponding countermeasure and the precautionary measures.
Embodiment 1:
A certain 220kV current transformer, move after 2 years, carry out the oil chromatography analysis, find that hydrogen, two kinds of gas contents of methane occur unusual, content is respectively hydrogen 3629 μ L/L, and methane 286 μ L/L are according to the criterion of current transformer insulating wax, there is slight waxization in this current transformer, should strengthen operating supervision.
Checking: winding of this current transformer is through drawing a core inspection, and end screen, zero screen lead-in wire contact are good, and once, the secondary termination contact is good, P1 side zero screen has less than the cured shape thing of the slight shape of 100mm between main #1 screen.
Embodiment 2:
A certain 220kV current transformer, move after 2 years, carry out the oil chromatography analysis, it is unusual to find that hydrogen, two kinds of gas contents of methane occur, and content is respectively hydrogen 8923 μ L/L, methane 412 μ L/L, according to the criterion of current transformer insulating wax, there is moderate waxization in this current transformer, should adopt an effective measure and strengthen operating supervision, the replacing of selecting a good opportunity.
Checking: winding of this current transformer is through drawing the core inspection, end screen, zero screen lead-in wire contact are good, and once, the secondary termination contact is good, P1 side zero screen obvious cured shape thing occurs between main #3 screen, the about 400mm of scope start point distance sweep, the cured shape thing of the about 600mm of length.
Embodiment 3:
A certain 220kV current transformer, move after 5 years, carry out the oil chromatography analysis, find that hydrogen, two kinds of gas contents of methane occur unusual, content is respectively hydrogen 13629 μ L/L, and methane 786 μ L/L are according to the criterion of current transformer insulating wax, there is severe waxization in this current transformer, should be out of service immediately.
Checking: winding of this current transformer is through drawing a core inspection, and end screen, zero screen lead-in wire contact are good, and once, the secondary termination contact is good, zero screen has the cured shape thing in many places to 960mm scope between main 2 screens; There is a small amount of wax on the P1 limit; There is more wax on the L1 limit between main 1～4 screen, the about 500mm of scope start point distance sweep, and length is about the cured shape thing of 1100mm.
Claims (3)
1. current transformer insulating wax decision method, it is characterized in that current transformer is carried out the oil chromatography analysis, the content size of two kinds of characteristic gas hydrogen in the oil chromatography analysis and methane is analyzed comparison with current transformer insulating wax degree criterion value, thereby judge the insulating wax degree of current transformer.
2. current transformer insulating wax decision method according to claim 1, it is characterized in that described content size with two kinds of characteristic gas in the oil chromatography analysis is analyzed relatively with current transformer insulating wax degree criterion value is meant: when content value during greater than a certain setting, wax length is less than 100mm, think that promptly there is slight waxization in current transformer, should strengthen operating supervision; When content value during greater than another setting, wax length less than 900mm, thinks promptly that there is moderate waxization in current transformer greater than 100mm, should or, should adopt an effective measure and strengthen operating supervision, should actively carry out the equipment spare unit and prepare the replacing of selecting a good opportunity; When content value during greater than another setting again, wax length thinks promptly that greater than 900mm there is severe waxization in current transformer, should be out of service immediately, change.
3. current transformer insulating wax decision method according to claim 2, the a certain setting that it is characterized in that described criterion is meant: when hydrogen content is 1000-5000 μ L/L and methane 100-300 μ L/L, there is slight waxization in current transformer, should strengthen operating supervision; When hydrogen content is 5001-10000 μ L/L and methane 301-500 μ L/L, there is moderate waxization in current transformer, should adopt an effective measure and strengthen operating supervision, the replacing of selecting a good opportunity; When hydrogen content surpasses 10000 μ L/L and methane surpasses 500 μ L/L, there is severe waxization in current transformer, should be out of service immediately.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010514374 CN102033214A (en) | 2010-10-21 | 2010-10-21 | Method for judging insulation waxing of current transformer |
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| CN 201010514374 CN102033214A (en) | 2010-10-21 | 2010-10-21 | Method for judging insulation waxing of current transformer |
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| CN102033214A true CN102033214A (en) | 2011-04-27 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614775A (en) * | 2009-07-15 | 2009-12-30 | 河北科技大学 | Transformer State Assessment system and appraisal procedure thereof based on Multi-source Information Fusion |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614775A (en) * | 2009-07-15 | 2009-12-30 | 河北科技大学 | Transformer State Assessment system and appraisal procedure thereof based on Multi-source Information Fusion |
Non-Patent Citations (3)
| Title |
|---|
| 《河北电力技术》 20021231 阎春雨等 少油设备中单氢含量高的故障原因分析 , 第05期 * |
| 《河北电力技术》 20060831 刘海峰等 油浸式电流互感器缺陷分析与状态诊断 第25卷, 第04期 * |
| 《河北电力技术》 20080229 李明星等 220kV电流互感器油色谱气体含量超标分析及防范措施 第27卷, 第01期 * |
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Free format text: CORRECT: ADDRESS; FROM: 050021 SHIJIAZHUANG, HEBEI PROVINCE TO: 050091 SHIJIAZHUANG, HEBEI PROVINCE |
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Effective date of registration: 20130105 Address after: 050091 Hebei high tech District of Shijiazhuang City Xinshi North Road, No. 86 Applicant after: Hebei Electric Power Construction & Adjustment Research Institute Applicant after: State Grid Corporation of China Applicant after: Electric Power Research Institute of Hebei Electric Power Corporation Address before: 050021 No. 238 South Sports street, Hebei, Shijiazhuang Applicant before: Hebei Electric Power Construction & Adjustment Research Institute |
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Application publication date: 20110427 |