CN102455408A - Gas relay calibration detection device and method - Google Patents
Gas relay calibration detection device and method Download PDFInfo
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- CN102455408A CN102455408A CN2010105214244A CN201010521424A CN102455408A CN 102455408 A CN102455408 A CN 102455408A CN 2010105214244 A CN2010105214244 A CN 2010105214244A CN 201010521424 A CN201010521424 A CN 201010521424A CN 102455408 A CN102455408 A CN 102455408A
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Abstract
The invention provides a gas relay calibration detection device, which comprises a gas storage tank for storing a compressed gas and a gas pipe communicated with the gas storage tank, wherein the gas pipe is provided with a pressure sensor and a flow sensor; the pressure sensor is used for measuring the pressure of the gas flow output by the gas pipe during gas relay calibration detection; and the flow sensor is used for measuring the flow rate of the gas flow output by the gas pipe during gas relay calibration detection. In addition, the invention also provides a gas relay calibration detection method. According to the gas relay calibration detection device and the gas relay calibration detection method, the device is environment-friendly and small in volume, can be used for field detection of operation characteristics of relays and is short in detection period, convenient, fast, accurate, reliable and high in work efficiency.
Description
[technical field]
The present invention relates to the transformer security protection technology field of electric system, especially relate to a kind of Buchholz relay calibration detection apparatus and method.
[background technology]
In electric system and electricity supplying and using system, transformer is a kind of and important power equipment, and the safe and stable operation of protection transformer also just becomes the important process of power supply department.Generally adopt oil-filled transformer in China's electric system at present, Buchholz relay is the important technique measure of protection oil-filled transformer safe operation, has advantages such as highly sensitive, that installation connection is simple.
At present; Buchholz relay calibration detection method mainly is that Buchholz relay to be detected is positioned over the Buchholz relay checking table in the laboratory; Through the Buchholz relay checking table at the laboratory simulation actual operating mode; Through the big or small baffle plate action that promotes Buchholz relay of the flow of electric pump control medium oil, promptly carry out the flow working value of Buchholz relay and demarcate, thereby to Buchholz relay calibration detection.Though this kind method is feasible, it is because use electric pump and medium oil, the bigger and easy contaminated environment of its volume; In addition, this method need be carried out under laboratory environment, for the scene of common electric power apparatus examination; This detection calibration steps can't carry out field calibration; Its calibration cycle is longer, and work efficiency is lower, is unfavorable for the judgement of substation equipment maintenance and repair and field failure.
[summary of the invention]
The technical matters that the present invention will solve is; Buchholz relay calibration detection apparatus and method sense cycle to prior art are longer; The low defective that is unfavorable for that substation equipment maintenance and repair and field failure are judged of work efficiency provides on-the-spot Buchholz relay calibration detection apparatus and the method for being applied to that a kind of sense cycle is short, work efficiency is higher.
In order to solve the problems of the technologies described above; The present invention provides a kind of Buchholz relay calibration detection apparatus; Comprise: one stores the gas-holder of pressure gas and connects the gas piping that is connected with said gas-holder; Said gas piping is provided with a pressure transducer and flow sensor, and said pressure transducer is used for measuring when the Buchholz relay calibration detects the pressure of said gas piping output gas flow, and said flow sensor is used for measuring when the Buchholz relay calibration detects the flow of said gas piping output gas flow.
Further, in above-mentioned Buchholz relay calibration detection apparatus, the end away from said gas-holder of said gas piping is provided with the nozzle of a taper.
Further, in above-mentioned Buchholz relay calibration detection apparatus, also be provided with an electrically operated valve on the said gas piping, the flow of the nozzle output gas flow of the aperture may command gas piping through said electrically operated valve.
Further, in above-mentioned Buchholz relay calibration detection apparatus, said electrically operated valve is an electromagnetic valve.
Further, in above-mentioned Buchholz relay calibration detection apparatus, said device comprises that also one is used for said gas-holder is carried out the air pump of precompressed gas storage.
The present invention also provides a kind of Buchholz relay calibration detection method, may further comprise the steps:
Set up the mathematical model of the gas flow and the oily flow corresponding relation of Buchholz relay;
The jet gas of control Buchholz relay calibration detection apparatus promotes Buchholz relay action baffle plate;
Flow, pressure and the transformation period of said jet gas during through pressure transducer and the action of flow sensor record trigger relay contact; Draw the corresponding oily flow value of gas stream value of jet flow through the mathematical model of said gas flow and oily flow corresponding relation, thereby the acting characteristic of relay is carried out the scene detection.
Further, in above-mentioned Buchholz relay calibration detection method, the step of the mathematical model of the said gas flow of setting up Buchholz relay and oily flow corresponding relation specifically comprises:
Under pervasive situation, the Buchholz relay operating point is tested gas flow when moving and oily data on flows, the pairing oily flow value of gas with various flow when drawing the Buchholz relay action according to Buchholz relay.
Further, in above-mentioned Buchholz relay calibration detection method, the flow value measurement range of said gas is 2m/s～20m/s, and corresponding oily flow value is 0.2m/s～2m/s.
Further; In above-mentioned Buchholz relay calibration detection method; The step that the jet gas of said control Buchholz relay calibration detection apparatus promotes Buchholz relay action baffle plate specifically comprises: through the aperture of control electromagnetic valve door; The output gradual change increases the jet gas of flow, to promote Buchholz relay action baffle plate.
Further, in above-mentioned Buchholz relay calibration detection method, said method also is included in checks that the gas storage of Buchholz relay calibration detection apparatus is denied capacity before calibration detects, and then inflates through air pump as in shortage.
Buchholz relay calibration detection apparatus of the present invention and method environmental protection, advantages of small volume can be carried out the scene to the acting characteristic of relay and detected, and sense cycle is short, and be convenient and swift and accurately and reliably, high efficiency.
[description of drawings]
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the structural representation of Buchholz relay calibration detection apparatus of the present invention preferred embodiment;
Fig. 2 is the principle of work synoptic diagram of Buchholz relay calibration detection apparatus of the present invention;
Fig. 3 is the schematic flow sheet of Buchholz relay calibration detection method of the present invention.
[embodiment]
See also Fig. 1, Fig. 1 is the structural representation of Buchholz relay calibration detection apparatus of the present invention preferred embodiment.Buchholz relay calibration detection apparatus 1 of the present invention comprises gas-holder 10 and the gas piping 20 that is connected with gas-holder 10 perforations, and said gas piping 20 extend in the Buchholz relay 2 to be measured, and said Buchholz relay 2 comprises an action baffle plate 201.
Gas-holder described in the present embodiment 10 is a cylindrical shape air container, and its storage inside has a large amount of pressure gass; The nozzle 30 that the end away from gas-holder 10 of gas piping 20 is provided with a taper ejects high velocity air to Buchholz relay 2 when being used for detecting.In addition, also be provided with an electrically operated valve 40 on the gas piping 20, the flow of aperture may command nozzle 30 output gas flows through electrically operated valve 40, electrically operated valve 40 is a solenoid valve in the present embodiment; Simultaneously, also be provided with a pressure transducer 50 and flow sensor 60 on the gas piping 20, the pressure and the flow of gaging nozzle 30 output gas flows when being respectively applied for Buchholz relay calibration detection.Buchholz relay calibration detection apparatus of the present invention also comprises an air pump (figure does not show), is used for gas-holder 10 is carried out precompressed gas storage.
Please consult Fig. 1 and Fig. 2 simultaneously, Fig. 2 is the principle of work synoptic diagram of Buchholz relay calibration detection apparatus of the present invention.When using Buchholz relay calibration detection apparatus 1 of the present invention, whether the gas-holder 10 of at first checking Buchholz relay calibration detection apparatus 1 capacity, if find the gas storage deficiency then need carry out precompressed gas storage to gas-holder 10 through air pump; Then the nozzle 30 of the gas piping 20 of Buchholz relay calibration detection apparatus 1 is aimed at and extend in the Buchholz relay 2 to be measured; Open electrically operated valve 40; And the control of the aperture through electrically operated valve 40 is ejected into the flow of the air-flow in the Buchholz relay 2, for example can adopt the mode of ascending gradual change.Simultaneously, pressure transducer 50 and 60 pairs of said air-flows of flow sensor of being provided with on the gas piping 20 are measured.When the gas of the nozzle of gas piping 20 30 outputs promotes action baffle plate 201 actions of Buchholz relay 2; Gas atmosphere and transformation period during through pressure transducer 60 record Buchholz relays 2 action connection points, gas flow and transformation period during simultaneously also through flow sensor 60 record Buchholz relays 2 action connection points.The relation of the gas flow during according to the Buchholz relay that obtains of test 2 actions in advance and corresponding oily flow; The pairing oily flow of gas flow in the time of can obtaining Buchholz relay 2 actions; Thereby can judge the duty that comprises oily flow, air pressure and the transformation period etc. that arrive operating point of Buchholz relay 2 at the scene, realize the calibration of Buchholz relay 2 is detected.
The present invention also provides a kind of Buchholz relay calibration detection method, sees also Fig. 3, and Fig. 3 is the schematic flow sheet of Buchholz relay calibration detection method of the present invention preferred embodiment.
Buchholz relay calibration detection method of the present invention may further comprise the steps:
Step S1: the mathematical model of setting up the gas flow and the oily flow corresponding relation of Buchholz relay.
This step S1 specifically comprises: under pervasive situation, the Buchholz relay operating point is tested gas flow when moving according to Buchholz relay and oily data on flows, the pairing oily flow value of gas with various flow when drawing the Buchholz relay action.The flow value measurement range of gas described in this enforcement is 2m/s～20m/s, and corresponding oily flow value is 0.2m/s～2m/s.
Step S2: the jet gas of control Buchholz relay calibration detection apparatus promotes Buchholz relay action baffle plate.
In the present embodiment, step S2 specifically comprises: through the aperture of control electromagnetic valve door, the output gradual change increases the jet gas of flow, to promote Buchholz relay action baffle plate.Wherein, the flow value measurement range 2m/s～20m/s of said jet gas.Special, for the Buchholz relay of QJ-25 type, its gas piping caliber is 25mm, the flow of said jet gas is 1.0m/s; For the Buchholz relay of QJ-50 type, its gas piping caliber is 50mm, and the flow range of said jet gas is 0.6～1.2m/s; For the Buchholz relay of QJ-80 type, its gas piping caliber is 80mm, and the flow range of said jet gas is 0.7～1.5m/s.
Said step S2 also is included in and checks that the gas storage of Buchholz relay calibration detection apparatus is denied capacity before calibration detects, and then inflates through air pump as in shortage.
Step S3: flow, pressure and the transformation period of said jet gas during through pressure transducer and the action of flow sensor record trigger relay contact; Draw the corresponding oily flow value of gas stream value of jet flow through the mathematical model of said gas flow and oily flow corresponding relation, thereby the acting characteristic of relay is carried out the scene detection.
Than prior art, Buchholz relay calibration detection apparatus of the present invention and method detect through the calibration that gas medium carries out Buchholz relay, do not need working medium oil to detect environmental protection; The advantages of small volume of Buchholz relay calibration detection apparatus of the present invention can be carried out the scene to the acting characteristic of relay and detected, and sense cycle is short, and is convenient and swift and accurately and reliably, high efficiency.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (10)
1. Buchholz relay calibration detection apparatus; It is characterized in that; Said device comprises that one stores the gas-holder of pressure gas and connects the gas piping that is connected with said gas-holder; Said gas piping is provided with a pressure transducer and flow sensor, and said pressure transducer is used for measuring when the Buchholz relay calibration detects the pressure of said gas piping output gas flow, and said flow sensor is used for measuring when the Buchholz relay calibration detects the flow of said gas piping output gas flow.
2. Buchholz relay calibration detection apparatus according to claim 1 is characterized in that: the end away from said gas-holder of said gas piping is provided with the nozzle of a taper.
3. Buchholz relay calibration detection apparatus according to claim 2 is characterized in that: also be provided with an electrically operated valve on the said gas piping, the flow of the nozzle output gas flow of the aperture may command gas piping through said electrically operated valve.
4. Buchholz relay calibration detection apparatus according to claim 3 is characterized in that: said electrically operated valve is an electromagnetic valve.
5. according to each Buchholz relay calibration detection apparatus of claim 1-4, it is characterized in that: said device comprises that also one is used for said gas-holder is carried out the air pump of precompressed gas storage.
6. a Buchholz relay calibration detection method is characterized in that, said method comprising the steps of:
Set up the mathematical model of the gas flow and the oily flow corresponding relation of Buchholz relay;
The jet gas of control Buchholz relay calibration detection apparatus promotes Buchholz relay action baffle plate;
Flow, pressure and the transformation period of said jet gas during through pressure transducer and the action of flow sensor record trigger relay contact; Draw the corresponding oily flow value of gas stream value of jet flow through the mathematical model of said gas flow and oily flow corresponding relation, thereby the acting characteristic of relay is carried out the scene detection.
7. Buchholz relay according to claim 6 calibration detection method is characterized in that: the step of the mathematical model of the said gas flow of setting up Buchholz relay and oily flow corresponding relation specifically comprises:
Under pervasive situation, the Buchholz relay operating point is tested gas flow when moving and oily data on flows, the pairing oily flow value of gas with various flow when drawing the Buchholz relay action according to Buchholz relay.
8. Buchholz relay calibration detection method according to claim 7, it is characterized in that: the flow value measurement range of said gas is 2m/s～20m/s, corresponding oily flow value is 0.2m/s～2m/s.
9. Buchholz relay calibration detection method according to claim 6; It is characterized in that: the step that the jet gas of said control Buchholz relay calibration detection apparatus promotes Buchholz relay action baffle plate specifically comprises: through the aperture of control electromagnetic valve door; The output gradual change increases the jet gas of flow, to promote Buchholz relay action baffle plate.
10. Buchholz relay calibration detection method according to claim 6 is characterized in that: said method also is included in checks that the gas storage of Buchholz relay calibration detection apparatus is denied capacity before calibration detects, and then inflates through air pump as in shortage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105214244A CN102455408A (en) | 2010-10-27 | 2010-10-27 | Gas relay calibration detection device and method |
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| CN2010105214244A CN102455408A (en) | 2010-10-27 | 2010-10-27 | Gas relay calibration detection device and method |
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| CN102455408A true CN102455408A (en) | 2012-05-16 |
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Cited By (8)
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| CN102879737A (en) * | 2012-10-23 | 2013-01-16 | 上海市电力公司 | Field calibration method for gas relay |
| CN102998616A (en) * | 2012-10-23 | 2013-03-27 | 上海市电力公司 | Online calibrating method for transformer sudden-change pressure relay |
| CN103048614A (en) * | 2012-12-11 | 2013-04-17 | 上海市电力公司 | Portable type gas relay scene calibrator |
| CN106094898A (en) * | 2016-07-06 | 2016-11-09 | 国家电网公司 | A kind of gas relay flow velocity value coarse adjustment mechanism |
| CN106680707A (en) * | 2017-03-06 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | System, device and method for heavy gas action setting value of double-float gas relay |
| CN109520699A (en) * | 2018-12-20 | 2019-03-26 | 中国航天空气动力技术研究院 | A kind of shock tunnel jet flow response speed and stagnation pressure test macro and test method |
| CN111207878A (en) * | 2020-04-16 | 2020-05-29 | 广东电网有限责任公司佛山供电局 | Air pressure critical value test system and method for heavy gas protection action |
| CN114740345A (en) * | 2022-05-12 | 2022-07-12 | 北京中瑞和电气有限公司 | External capacitive digital gas relay and online monitoring system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN102879737B (en) * | 2012-10-23 | 2015-11-18 | 上海市电力公司 | A kind of pressure transducer field calibration method of Buchholz relay |
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| CN103048614A (en) * | 2012-12-11 | 2013-04-17 | 上海市电力公司 | Portable type gas relay scene calibrator |
| CN106094898B (en) * | 2016-07-06 | 2019-09-10 | 国家电网公司 | A kind of gas relay flow velocity value coarse adjustment mechanism |
| CN106094898A (en) * | 2016-07-06 | 2016-11-09 | 国家电网公司 | A kind of gas relay flow velocity value coarse adjustment mechanism |
| CN106680707A (en) * | 2017-03-06 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | System, device and method for heavy gas action setting value of double-float gas relay |
| CN106680707B (en) * | 2017-03-06 | 2023-10-17 | 云南电网有限责任公司电力科学研究院 | Method, device and system for checking heavy gas action setting value of double-float gas relay |
| CN109520699A (en) * | 2018-12-20 | 2019-03-26 | 中国航天空气动力技术研究院 | A kind of shock tunnel jet flow response speed and stagnation pressure test macro and test method |
| CN109520699B (en) * | 2018-12-20 | 2024-05-03 | 中国航天空气动力技术研究院 | Shock tunnel jet response speed and total pressure testing system and testing method |
| CN111207878A (en) * | 2020-04-16 | 2020-05-29 | 广东电网有限责任公司佛山供电局 | Air pressure critical value test system and method for heavy gas protection action |
| CN114740345A (en) * | 2022-05-12 | 2022-07-12 | 北京中瑞和电气有限公司 | External capacitive digital gas relay and online monitoring system |
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Application publication date: 20120516 |