CN202974976U - System for detecting accuracy of SF6 on-line monitoring device - Google Patents
System for detecting accuracy of SF6 on-line monitoring device Download PDFInfo
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- CN202974976U CN202974976U CN 201220551391 CN201220551391U CN202974976U CN 202974976 U CN202974976 U CN 202974976U CN 201220551391 CN201220551391 CN 201220551391 CN 201220551391 U CN201220551391 U CN 201220551391U CN 202974976 U CN202974976 U CN 202974976U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 94
- 238000012544 monitoring process Methods 0.000 description 15
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- 238000005259 measurement Methods 0.000 description 8
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- 231100000252 nontoxic Toxicity 0.000 description 1
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Abstract
The utility model provides a system for detecting the accuracy of an SF6 on-line monitoring device. The system comprises a gas generation device, a gas container, a temperature control cabinet, an off-line SF6 precision measuring instrument and an SF6 gas recovery device. The system is characterized in that the gas generation device is a gas dew-point generator or a standard gas generator, the gas generation device is connected to the gas container; the gas container is provided with a thermometer, a pressure gauge and a density monitoring device and is connected with the SF6 on-line monitoring device and the off-line SF6 precision measuring instrument; the off-line SF6 precision measuring instrument comprises a chilled-mirror SF6 dew-point instrument and an SF6 decomposition product test instrument; and the SF6 gas recovery device is used for recovering detected SF6 gas. The system disclosed by the utility model can realize the detection of the accuracy of the SF6 on-line monitoring device, achieve the traceability and the high reliability of a detection result, greatly enhance the action of the SF6 on-line monitoring device on an electric system and enhance the safety of the electric system.
Description
Technical field
The utility model relates to the detection system of a kind of on-Line Monitor Device for power transmission and transforming equipment in electric system-SF6 on-Line Monitor Device accuracy, utilize gas container simulation SF6 power transmission and transforming equipment, utilize the SF6 parameter measuring apparatus of the higher off-line of class of accuracy, accuracy of measurement to the SF6 on-Line Monitor Device detects, and belongs to electrotechnical measurement and detection technique field.
Background technology
Power transmission and transforming equipment is very important equipment in electric system, and its running status directly affects Security of the system.In electric system, traditional " scheduled overhaul " ignored the actual operating state of equipment, and tool bears the character of much blindness and be mandatory, has larger defective.In order in time to find the early defect of electrical equipment, prevent the generation of burst accident, reduce simultaneously unnecessary interruption maintenance, the massive losses of avoiding traditional experiment that power transmission and transforming equipment is caused due to " excessively maintenance ", the serviceable life of effective extension device, overhaul of the equipments is reached distribute rationally, need to carry out real-time on-line monitoring or online detection regularly to the power transmission and transforming equipment running status.Use on-line monitoring in the high-tension apparatus of operation, detect and diagnostic techniques online, make Predictive Maintenance replace tradition and the correction maintenance and the preventive maintenance that fall behind are historical certainty.Power transmission and transforming equipment is carried out on-line monitoring, can further realize the power transmission and transforming equipment operation conditions is carried out inline diagnosis, the electric system maintenance is developed from " prophylactic repair " to " repair based on condition of component ".
SF6 gas is a kind of good insulating medium and arc-extinguishing medium, it have nontoxic, non-combustible, dielectric strength is high and the arc extinguishing ability considerably beyond general dielectric characteristics, the dielectric strength of SF6 gas is 2.5 times of left and right of the identical air of air pressure in uniform electric field, and the arc extinguishing ability of SF6 gas is the decades of times of air simultaneously.Along with the concern that people are received in continuous growth and the environmental protection of power demand day by day, SF6 gas also more and more is applied in high-voltage electrical equipment.In recent decades, the SF6 air insulating device has become the direction of power transmission and transforming equipment development, and the technical parameter of various SF6 air insulating devices has reached very high level.The appearance of SF6 gas makes the power transmission and transforming equipment insulation become possibility without oiling, its good arc extinguishing ability make primary cut-out obtain larger cut-off capacity in structure compacter, maintenance workload reduces, especially expedited the emergence of SF6 gas insulated combined electrical equipment (GIS) and derivative electric equipment thereof, made High-Voltage Electrical Appliances that qualitative leap occur.
But, the SF6 power transmission and transforming equipment is in operational process, inevitably can run into the problem of the water cut of Leakage Gas and gas, the reliability that these problems can have influence on SF6 equipment when moving in system, so, in order to guarantee the safe operation of this kind equipment, must carry out on-line monitoring to the state of the SF6 in equipment.for the SF6 high-tension apparatus, guarantee the safe operation of equipment, the state parameter that can be used for online monitoring mainly contains the density of SF6, decomposition product after micro-water content and discharge, the on-Line Monitor Device for SF6 that many manufacturers of Current Domestic develop all is based on this state parameter, but very different due to manufacturer, do not have corresponding national standard to put into effect and do not have relevant testing agency that the quality of on-Line Monitor Device is checked on, can't examine the accuracy of SF6 on-Line Monitor Device institute monitoring variable indicating value, cause transformer station can't trust the data that on-Line Monitor Device monitors fully, can only use as reference, can't estimate operating status of equipment, make on-Line Monitor Device be far from reaching the effect that it can play in electric system, be unfavorable for that also system overhaul develops from " prophylactic repair " to " repair based on condition of component ".
It is the SF6 on-Line Monitor Device of density and micro-water content for monitoring variable, pressure, relative humidity and the temperature of the inner SF6 gas of measuring equipment during operation, then by suitable modification method, and the micro-water content (dew point value) the when force value in the time of 20 ℃ that the final value that shows is SF6 in equipment and 20 ℃.Because in engineering reality, the gas density monitoring of SF6 is not easy to realize, usually be converted into the monitoring to pressure, but during density constant, the pressure of SF6 can change along with the variation of temperature, for the variation of reaction pressure exactly produces due to gas leakage rather than temperature produces, just needs by suitable modification method, normal pressure when making the SF6 actual pressure be modified to 20 ℃, and will be worth the density value that equivalence is SF6 in air chamber; And for micro-water content, because temperature and pressure is all influential to the micro-water content of gas, so, the relative humidity of the simple SF6 that surveys by humidity sensor can't represent the micro-water content of SF6 gas, because the data of relative humidity are subjected to the pressure and temperature effect of gas, not having can be with reference to property, thus the implementation data that records need to by formula calculate and table look-up draw SF6 gas 20 ℃ the time water cut (the μ L/L of unit) and dew point value (unit ℃) as with reference to amount.
Being the SF6 on-Line Monitor Device of decomposition product after SF6 discharge for monitoring variable, is mainly that the content that decomposes the gases such as the SO2, the H2S that produce and CO by producing SF6 after discharge in measuring equipment is realized the monitoring of SF6 power transmission and transformation equipment state.
Chinese invention patent " the integrated on-line device that is used for SF6 gas density and little water " (application number: 201010505637.8 applyings date: 2010-10-13) proposed a kind of integrated on-line device for SF6 gas density and little water, comprise air path part, comprise air intake opening, gas outlet and sensor installation port; Circuit part is installed on described air path part, and comprises sensor and data processing module, wherein, adopts inlet non return check valve to realize being connected of gas circuit between described air intake opening and described gas outlet.This invention helps to promote the accuracy of on-line monitoring.Yet this invention technical scheme is more single, can't systematically address the above problem.
In view of this, the utility model provides a kind of SF6 on-Line Monitor Device accuracy detection system, to address the above problem.
Summary of the invention
The purpose of this utility model is in order to solve the problem that can't detect for the accuracy of SF6 on-Line Monitor Device of mentioning in background technology, the detection system of a kind of SF6 on-Line Monitor Device accuracy is disclosed, set up SF6 on-Line Monitor Device accuracy detection system, utilize the SF6 parameter measuring apparatus of the higher off-line of class of accuracy, the accuracy of measurement of density, micro-water content and the decomposition product that the SF6 on-Line Monitor Device is monitored detects.
The technical solution of the utility model is: a kind of SF6 on-Line Monitor Device accuracy detection system, described system comprises: gas generating unit, gas container, temperature-controlled cabinet, off-line type SF6 fine measuring instrument and SF6 gas concentration unit, it is characterized in that: gas generating unit is gas dew point generator or calibrating gas, and gas generating unit is connected to gas container; Gas container is with thermometer, tensimeter and density monitoring device, and is connected with SF6 on-Line Monitor Device and off-line type SF6 fine measuring instrument; Off-line type SF6 fine measuring instrument comprises chilled-mirror type SF6 dew point hygrometer and SF6 decomposition product tester; The SF6 gas concentration unit is used for reclaiming the SF6 gas after having detected.
SF6 on-Line Monitor Device accuracy detection system as above, it is characterized in that: described gas container is equipment for customizing, with the apparatus installation interface, is used for the SF6 on-Line Monitor Device is installed on interface according to normal operating conditions.
SF6 on-Line Monitor Device accuracy detection system as above is characterized in that: described gas container connects the interface of gas generating unit and off-line type SF6 fine measuring instrument with controlled valve, is used for controlling the break-make of gas.
SF6 on-Line Monitor Device accuracy detection system as above is characterized in that: after detection was completed, SF6 gas recycled by the SF6 gas concentration unit, can not impact environment.
SF6 on-Line Monitor Device accuracy detection system as above is characterized in that: described thermometer, tensimeter and off-line type SF6 fine measuring instrument are the surveying instrument that can trace to the source, make the accuracy of SF6 on-Line Monitor Device to measure and trace to the source.
The beneficial effects of the utility model are: the utility model SF6 on-Line Monitor Device accuracy detection system can realize the detection of SF6 on-Line Monitor Device accuracy, testing result has tractability, reliability is high, can greatly improve the effect of SF6 on-Line Monitor Device in electric system, improve the security of electric system.
Description of drawings
Fig. 1 is that system of the present utility model consists of schematic diagram.
Fig. 2 is the schematic diagram of the utility model embodiment.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
As shown in Figure 1, a kind of SF6 on-Line Monitor Device accuracy detection system that the utility model provides, system comprises 5 parts, gas generating unit, gas container, temperature-controlled cabinet, off-line type SF6 fine measuring instrument and SF6 gas concentration unit.Its characteristics are as follows:
1. gas generating unit is gas dew point generator or calibrating gas.Dew point can occur the gas dew point generator is the SF6 gas of-60 ℃～-20 ℃, has the advantages that precision is high, scope is wide, is the matured product of present stage.
2. gas container is with temperature, pressure and density monitoring device, can connect gas generating unit, SF6 on-Line Monitor Device and off-line type SF6 fine measuring instrument, connect the interface of gas generator and off-line type SF6 fine measuring instrument with controlled valve, can control the break-make of gas.
3. off-line type SF6 fine measuring instrument comprises chilled-mirror type SF6 dew point hygrometer and SF6 decomposition product tester.These two kinds of equipment are matured product, and measuring accuracy is higher than the SF6 on-Line Monitor Device.
4. gas container be with temperature, pressure and density monitoring device, off-line type SF6 fine measuring instrument etc. the surveying instrument that can trace to the source.
In Fig. 1, gas container is placed in temperature-controlled cabinet, gas container has interface can connect gas generating unit, SF6 on-Line Monitor Device and off-line type SF6 fine measuring instrument with thermometer, tensimeter and density monitoring device, connects the SF6 retracting device after the off-line type surveying instrument.At first, gas is produced by gas generating unit, be filled with in gas container, being filled with gas humidity and the amount of being filled with is controlled by gas generating unit, in gas container, gas temperature is controlled by temperature-controlled cabinet, and pressure, temperature and the density of the tensimeter of gas container and density monitor and thermometer measure gas in container are after gas temperature is stablized in gas container, use the SF6 on-Line Monitor Device to measure, draw the demonstration result that SF6 supervises the side device online after revising by calculating; Then, open the valve that gas container connects the off-line type surveying instrument, use off-line type SF6 fine measuring instrument to measure, in measuring process, SF6 gas enters the SF6 gas concentration unit through after surveying instrument, and the demonstration result of measurement result and SF6 on-Line Monitor Device compares, calculate the error of SF6 on-Line Monitor Device, complete the detection of SF6 on-Line Monitor Device accuracy; Afterwards, the gas in gas container is reclaimed by the SF6 gas concentration unit by off-line type testing tool interface.
The detection method that the SF6 on-Line Monitor Device accuracy detection system that adopts the utility model to provide is carried out the accuracy of SF6 on-Line Monitor Device, its step is as follows: tested SF6 on-Line Monitor Device is arranged on the gas container of customization, the parameter of measurement gas gas in container; According to the performance requirement of SF6 on-Line Monitor Device, the gas of different parameters occuring by gas generating unit, is filled with in gas container; The working temperature that the simulation of serviceability temperature control box is different, use the parameter of off-line type SF6 fine measuring instrument measurement gas gas in container, compare with the measured result of tested SF6 on-Line Monitor Device, calculate both errors, thereby detect the accuracy of SF6 on-Line Monitor Device.
As shown in Figure 2, detect schematic diagram for the accuracy of SF6 on-Line Monitor Device.
The testing process of the accuracy when being SF6 density for SF6 on-Line Monitor Device monitoring variable is: under same temperature, be filled with the SF6 calibrating gas of different amounts in gas container, each standing 2 as a child read the reading of the density monitor of connecting container afterwards, and the reading of on-Line Monitor Device, calculate both errors; To being filled with a certain amount of SF6 calibrating gas in gas container, change the temperature of gas container external temperature control box, each standing 2 as a child read the reading of the density monitor of connecting container afterwards, and the reading of on-Line Monitor Device, calculated both errors.
The SF6 micro-water content of accuracy testing process when being to(for) SF6 on-Line Monitor Device monitoring variable is: under same temperature, be filled with SF6 or the N2 of different micro-water contents in gas container by the dew point generator, standingly read reading to the on-Line Monitor Device stable reading, open afterwards the interface towards surveying instrument, this moment, surveying instrument was chilled-mirror type dew point instrument, use dew point hygrometer measurement gas dew point, calculate both errors; In the constant situation of gas humidity in gas container, change the temperature of gas container external temperature control box, standingly read reading to the on-Line Monitor Device stable reading, open afterwards the interface towards surveying instrument, use dew point hygrometer measurement gas dew point, calculate both errors.
The SF6 decomposition product of accuracy testing process when being to(for) SF6 on-Line Monitor Device monitoring variable is: be filled with a certain amount of pure gas (SO2, H2S or CO) in gas container, standingly read reading to the on-Line Monitor Device stable reading, open afterwards the interface towards tester, use SF6 decomposition product tester measurement gas content, calculate both errors.
The content that is not described in detail in this instructions belongs to the known prior art of this area professional and technical personnel.
Claims (5)
1. SF6 on-Line Monitor Device accuracy detection system, described system comprises: gas generating unit, gas container, temperature-controlled cabinet, off-line type SF6 fine measuring instrument and SF6 gas concentration unit, it is characterized in that: gas generating unit is gas dew point generator or calibrating gas, and gas generating unit is connected to gas container; Gas container is with thermometer, tensimeter and density monitoring device, and is connected with SF6 on-Line Monitor Device and off-line type SF6 fine measuring instrument; Off-line type SF6 fine measuring instrument comprises chilled-mirror type SF6 dew point hygrometer and SF6 decomposition product tester; The SF6 gas concentration unit is used for reclaiming the SF6 gas after having detected.
2. SF6 on-Line Monitor Device accuracy detection system according to claim 1, it is characterized in that: described gas container is equipment for customizing, with the apparatus installation interface, is used for the SF6 on-Line Monitor Device is installed on interface according to normal operating conditions.
3. SF6 on-Line Monitor Device accuracy detection system according to claim 1 is characterized in that: described gas container connects the interface of gas generating unit and off-line type SF6 fine measuring instrument with controlled valve, is used for controlling the break-make of gas.
4. SF6 on-Line Monitor Device accuracy detection system according to claim 1 is characterized in that: detect complete after, SF6 gas recycles by the SF6 gas concentration unit, can not impact environment.
5. SF6 on-Line Monitor Device accuracy detection system according to claim 1, it is characterized in that: described thermometer, tensimeter and off-line type SF6 fine measuring instrument are the surveying instrument that can trace to the source, make the accuracy of SF6 on-Line Monitor Device to measure and trace to the source.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102944645A (en) * | 2012-10-26 | 2013-02-27 | 中国电力科学研究院 | SF6 online monitoring apparatus accuracy detection system and method thereof |
| CN103558346A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Device for checking sulfur hexafluoride leakage alarm apparatus |
| CN104820175A (en) * | 2015-05-07 | 2015-08-05 | 国网安徽省电力公司 | Device and experimental method for researching insulating property of micro water containing SF6 gas |
| CN105444805A (en) * | 2015-10-21 | 2016-03-30 | 国家电网公司 | Integrated wireless sensor for density and humidity monitoring of SF6 gas |
| CN105954468A (en) * | 2016-05-18 | 2016-09-21 | 韩少茹 | SF6 gas online monitoring system |
| CN106018689A (en) * | 2016-05-18 | 2016-10-12 | 韩少茹 | SF6 monitoring method for power transmission and transformation equipment |
| CN106053723A (en) * | 2016-05-25 | 2016-10-26 | 韩少茹 | Detecting device for power system gas insulated switchgear |
| CN106706163A (en) * | 2016-12-15 | 2017-05-24 | 深圳供电局有限公司 | Insulating gas temperature measuring device in sulfur hexafluoride electrical equipment |
| CN107064433A (en) * | 2017-05-23 | 2017-08-18 | 中国电力科学研究院 | A kind of SF6 On-Line Monitor Device of Gas degree of accuracy detecting system and method |
| CN109297958A (en) * | 2018-11-13 | 2019-02-01 | 国网四川省电力公司成都供电公司 | It is a kind of for monitoring the colour developing prior-warning device of SF6 Electric Power Equipment Insulation gas decomposition product in real time |
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- 2012-10-26 CN CN 201220551391 patent/CN202974976U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102944645A (en) * | 2012-10-26 | 2013-02-27 | 中国电力科学研究院 | SF6 online monitoring apparatus accuracy detection system and method thereof |
| CN103558346A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Device for checking sulfur hexafluoride leakage alarm apparatus |
| CN104820175B (en) * | 2015-05-07 | 2018-04-13 | 国网安徽省电力公司 | One kind research contains micro- water SF6The device and experimental method of gas-insulated characteristic |
| CN104820175A (en) * | 2015-05-07 | 2015-08-05 | 国网安徽省电力公司 | Device and experimental method for researching insulating property of micro water containing SF6 gas |
| CN105444805A (en) * | 2015-10-21 | 2016-03-30 | 国家电网公司 | Integrated wireless sensor for density and humidity monitoring of SF6 gas |
| CN105954468A (en) * | 2016-05-18 | 2016-09-21 | 韩少茹 | SF6 gas online monitoring system |
| CN106018689A (en) * | 2016-05-18 | 2016-10-12 | 韩少茹 | SF6 monitoring method for power transmission and transformation equipment |
| CN105954468B (en) * | 2016-05-18 | 2018-06-08 | 刘澄 | A kind of power switchgear on-line monitoring system |
| CN106018689B (en) * | 2016-05-18 | 2018-05-18 | 地和工业技术（上海）有限公司 | A kind of electric power power transmission and transforming equipment SF6 gas monitoring methods |
| CN106053723A (en) * | 2016-05-25 | 2016-10-26 | 韩少茹 | Detecting device for power system gas insulated switchgear |
| CN106053723B (en) * | 2016-05-25 | 2018-03-27 | 武汉华源铸诚电力股份有限公司 | Power system gas-insulated switchgear detection means |
| CN106706163A (en) * | 2016-12-15 | 2017-05-24 | 深圳供电局有限公司 | Insulating gas temperature measuring device in sulfur hexafluoride electrical equipment |
| CN107064433A (en) * | 2017-05-23 | 2017-08-18 | 中国电力科学研究院 | A kind of SF6 On-Line Monitor Device of Gas degree of accuracy detecting system and method |
| CN109297958A (en) * | 2018-11-13 | 2019-02-01 | 国网四川省电力公司成都供电公司 | It is a kind of for monitoring the colour developing prior-warning device of SF6 Electric Power Equipment Insulation gas decomposition product in real time |
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