CN102788918B - Method for applying gas to detect and diagnose internal fault of sulfur hexafluoride electrical equipment - Google Patents
Method for applying gas to detect and diagnose internal fault of sulfur hexafluoride electrical equipment Download PDFInfo
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- CN102788918B CN102788918B CN201210241575.3A CN201210241575A CN102788918B CN 102788918 B CN102788918 B CN 102788918B CN 201210241575 A CN201210241575 A CN 201210241575A CN 102788918 B CN102788918 B CN 102788918B
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Abstract
The invention discloses a method for applying a gas to detect and diagnose an internal fault of sulfur hexafluoride electrical equipment, which comprises the steps of analyzing normal devices and fault devices to form a corresponding relation between the fault device and decomposed components, and utilizing the relation to detect the to-be-measured device, so as to realize utilization of the gas to detect the internal fault of the sulfur hexafluoride electrical equipment. The method is simple; and software can be formed according to the method to be applied to a system, which can realize automation and intelligence of the detecting device. The method has an excellent utility value.
Description
Technical field
The present invention relates to a kind of method applying gas detect diagnosis sulfur hexafluoride electrical equipment internal fault.
Background technology
Due to SF
6gas has good chemical stability, excellent insulating property and lonely performance of going out, from last century the eighties be widely used in high-tension transformation equipment, last century Mo is with SF
6the hermetic seal electrical equipment doing to insulate is used in a large number, SF
6electrical equipment has become the main converting equipment of electric system.Safety and economic operation for electrical production plays good effect.But because equipment exists some uncertain factors in design, material, technique and maintenance, make device interior may there are some defects, and current test method is difficult to detect minor insulation hidden danger.After equipment investment runs, under heat and electric effect, defect constantly expands, and insulation constantly declines, until break down, affects the safety of electrical production.Therefore how the analyte of the apparatus insulated state of reflection, purity and water content detection project are carried out comprehensive descision, detect hidden danger in time, for Current Maintenance of Equipments provides scientific basis to be improve the important means of SF6 electrical equipment safety and economic operation.
Summary of the invention
In view of this, the invention provides a kind of method applying gas detect diagnosis sulfur hexafluoride electrical equipment internal fault, it is characterized in that:
Step S101: the predominating insulation by SF6 inside electric appliance: SF6 gas, epoxy resin, polyester nylon, teflon, polyester ethene and the insulating paper main decomposition thing that cracking produces under 100 DEG C ~ 700 DEG C temperature sections is tested, and then finds out the component of decomposition temperature and corresponding cracking;
Step S102: by the equipment Inspection of N platform, finds out the range of normal value of the described component that various kinds of equipment is decomposed, wherein N be greater than 5000 natural number;
Step S103: detect the component concentration that M platform drafts faulty equipment cracking, wherein M is greater than 100, and is less than the natural number of 250;
Step S104: normal value in the component concentration of step S103 detection and step S102 is compared, must be out of order and the corresponding relation of super normal value component, and store, compare in order to the follow-up component treating checkout equipment cracking, judge the fault of this equipment to be detected.
In an embodiment of the present invention, also comprise and be stored in the storer of a checkout equipment by the corresponding relation of described fault and super normal value component, the numerical value detected by this checkout equipment is mated with described corresponding relation, must be out of order.
In an embodiment of the present invention, described must being out of order is pointed out by text importing, and this prompting comprises fault title, fault seriousness and expert advice.
The present invention is by the analysis to normal device and faulty equipment, form the corresponding relation of faulty equipment and cracking component, utilize the detection of this relation device under test, application gas detect diagnosis sulfur hexafluoride electrical equipment internal fault can be realized, not only method is simple, and be applied to system by the corresponding software that the method is formed, the automatic, intelligent of checkout equipment can be realized.There is good practical value.
Accompanying drawing explanation
Fig. 1 is method flow schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
As shown in Figure 1, the present embodiment provides a kind of method applying gas detect diagnosis sulfur hexafluoride electrical equipment internal fault, it is characterized in that:
Step S101: the predominating insulation by SF6 inside electric appliance: SF6 gas, epoxy resin, polyester nylon, teflon, polyester ethene and the insulating paper main decomposition thing that cracking produces under 100 DEG C ~ 700 DEG C temperature sections is tested, and then finds out the component of decomposition temperature and corresponding cracking;
Step S102: by the equipment Inspection of N platform, finds out the range of normal value of the described component that various kinds of equipment is decomposed, wherein N be greater than 5000 natural number;
Step S103: detect the component concentration that M platform drafts faulty equipment cracking, wherein M is greater than 100, and is less than the natural number of 250;
Step S104: normal value in the component concentration of step S103 detection and step S102 is compared, must be out of order and the corresponding relation of super normal value component, and store, compare in order to the follow-up component treating checkout equipment cracking, judge the fault of this equipment to be detected; In the present embodiment, after judging fault, bonding apparatus state comprehensively can also analyze with other correlation test data, propose handling suggestion.
Concrete, here with 10,000 equipment, the normal value by 98% is added up, and finds out the range of normal value of the described component that various kinds of equipment is decomposed.Then 136 faulty equipment situations are drafted to the analyte content range of all kinds of fault, find out the apparatus insulated defect of reflection and the relation between the electrical test of overheating defect and analyte, as insulation resistance, dielectric loss, leakage current, relation between shelf depreciation and apparatus insulated defect; The relation of direct current resistance (or contact resistance) and apparatus overheat; Finally this relation is stored, building database.Be noted that database that the present invention sets up can be applicable to during field apparatus detects, that is, the numerical value detected and described database be compared, comprehensive analyze draw fault character, energy and possible position.In the present embodiment, this fault diagnosis drawn is pointed out by text importing, and this prompting comprises fault title, fault seriousness and expert advice.Such as: the SO2 in a certain isolating switch is 5.8uL/L, H2S be 0.0uL/L, CO be 23.6uL/L, HF is 0.2uL/L.Determining step: 1. contrast range of normal value, learns that its SO2 content is higher; 2. be trace because H2S is zero, HF, CO is not high, and within normal value, therefore fault does not relate to solid insulating material and decomposes; If 3. normal in conjunction with electrical test, being then illustrated as pure SF6 gas and decomposing, is floating potential discharge fault.Last diagnostic is judged as " SO2 is higher for this equipment, but does not relate to solid insulation decomposition, and inside may exist floating potential discharge fault, asks supervision, advises repetition measurement in month ".
Above-described embodiment is used for illustrative purposes only, those skilled in the art, without departing from the spirit and scope of the present invention, can also make various conversion or change, but all equivalent technical schemes also should belong to category of the present invention, are limited by each claim.
Claims (1)
1. apply a method for gas detect diagnosis sulfur hexafluoride electrical equipment internal fault, it is characterized in that:
Step S101: by SF
6the predominating insulation of inside electric appliance: SF
6gas, epoxy resin, polyester nylon, teflon, polyester ethene and the insulating paper main decomposition thing that cracking produces under 100 DEG C ~ 700 DEG C temperature sections is tested, and described analyte is sulphuric dioxide, sulfuretted hydrogen, carbon monoxide and hydrogen fluoride; And then find out component and the content thereof of decomposition temperature and corresponding cracking;
Step S102: by the equipment Inspection of N platform, finds out the range of normal value of the described component that various kinds of equipment is decomposed, wherein N be greater than 5000 natural number;
Step S103: detect the component concentration that M platform drafts faulty equipment cracking, wherein M is greater than 100, and is less than the natural number of 250;
Step S104: normal value in the component concentration of step S103 detection and step S102 is compared, must be out of order and the corresponding relation of super normal value component, and store, compare in order to the follow-up component treating checkout equipment cracking, judge the fault of this equipment to be detected;
Also comprise and be stored in the storer of a checkout equipment by the corresponding relation of described fault and super normal value component, the numerical value detected by this checkout equipment is mated with described corresponding relation, must be out of order;
Described being out of order is pointed out by text importing, and this prompting comprises fault title, fault seriousness and expert advice.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210241575.3A CN102788918B (en) | 2012-07-12 | 2012-07-12 | Method for applying gas to detect and diagnose internal fault of sulfur hexafluoride electrical equipment |
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| CN201210241575.3A CN102788918B (en) | 2012-07-12 | 2012-07-12 | Method for applying gas to detect and diagnose internal fault of sulfur hexafluoride electrical equipment |
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| CN102788918A CN102788918A (en) | 2012-11-21 |
| CN102788918B true CN102788918B (en) | 2015-04-22 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105067979A (en) * | 2015-08-10 | 2015-11-18 | 厦门加华电力科技有限公司 | SF6 electrical equipment partial discharge decomposition product comprehensive detector and control method thereof |
| CN111239573A (en) * | 2020-03-27 | 2020-06-05 | 广东电网有限责任公司电力科学研究院 | Online diagnosis method and device for internal fault of sulfur hexafluoride electrical equipment |
| CN113588538A (en) * | 2021-08-31 | 2021-11-02 | 国网陕西省电力公司电力科学研究院 | SF (sulfur hexafluoride)6Thermal corrosion evaluation method of polytetrafluoroethylene under atmosphere |
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| CN101782614A (en) * | 2010-02-20 | 2010-07-21 | 中国科学院电工研究所 | Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment |
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| CN201984116U (en) * | 2010-12-24 | 2011-09-21 | 河南省电力公司商丘供电公司 | Comprehensive evaluating device of sulfur hexafluoride electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04158271A (en) * | 1990-10-22 | 1992-06-01 | Mitsubishi Electric Corp | Apparatus for detecting internal failure of gas insulated electric device |
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| CN201594073U (en) * | 2010-01-14 | 2010-09-29 | 厦门加华电力科技有限公司 | Decomposition product on-line monitoring device of sulfur hexafluoride electrical equipment |
| CN101782614A (en) * | 2010-02-20 | 2010-07-21 | 中国科学院电工研究所 | Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment |
| CN201662555U (en) * | 2010-03-19 | 2010-12-01 | 重庆电力科学试验研究院 | Failure monitoring device for sulfur hexafluoride electric equipment |
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