CN1725015A - High-tension switch electrical equipment SF6 gas water content on-line monitoring device - Google Patents
High-tension switch electrical equipment SF6 gas water content on-line monitoring device Download PDFInfo
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- CN1725015A CN1725015A CN 200510085675 CN200510085675A CN1725015A CN 1725015 A CN1725015 A CN 1725015A CN 200510085675 CN200510085675 CN 200510085675 CN 200510085675 A CN200510085675 A CN 200510085675A CN 1725015 A CN1725015 A CN 1725015A
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Abstract
The invention is a device for on-line monitoring the water content of the SF6 gas of high voltage switching electrical appliance, characterized in mainly comprising power supply module, three signal process amplifying circuits, multi-channel switch, MCU, communication switching circuit, and three temperature sensors, three pressure transducers and three humidity sensors for measuring for three SF6 gas rooms in A-B-C three-phase separately-acting high voltage switch, etc. The device has the following advantages: 1. it can realize on-line and remote monitoring; 2. every sensor has good output linearity and the humidity accuracy is above twice higher than the national standard; 3. it is applied to high frequency electric field and outdoor environments; 4. it largely reduce the effluence of SF6 gas, thus assuring the health of operating personnel and reducing environmental pollution, and having completely important significance.
Description
Technical field
The present invention relates to high-tension switch electrical equipment on-line condition monitoring device, especially to the SF in the equipment containers such as primary cut-out, GIS
6The on-line monitoring of gas water content belongs to the power equipment field of measuring technique.
Background technology
SF
6Gas is a kind of inert gas, has good insulation performance and arc extinction performance, and its advantage is approved by people that more and more recent two decades is extensively applied in the equipment such as primary cut-out, GIS.Because SF
6Gas in the high voltage power transmission and transforming transmission course, SF
6When the water content of gas acquires a certain degree, isolating switch deciliter the action and usual charging operation process in, SF
6Gas is under the effect of electric charge, and its analyte has produced some toxic gases by hydrolysis reaction; While SF
6Gas is the main gas that produces greenhouse effect; Equipment such as a large amount of primary cut-outs and GIS mostly are to work out of doors, because there is SF in the air pressure of electric equipment gas container
6Little leakage of gas is unavoidable, so just also have moisture content to enter SF
6In the gas, make SF
6The insulation and the arc extinction performance of gas reduce greatly.And the SF under arcing
6Gas can decomposition reaction the toxigenicity thing, thereby cause equipment corrosion, the safe operation and the health of human body of electrical network constituted serious threat, therefore power department has just strictly been worked out SF specially both at home and abroad
6The regulation of gas vapor content.In order to measure SF
6The micro-water content of gas mainly is the dew point method of condensing with Cold Mirrors at present, has produced dew point hygrometer specially, regularly or aperiodically to each SF
6The micro-water content of air chamber carries out the preventative detection of off-line, and having exceeds standard method such as just changes.Dew point hygrometer is to have adopted optical system to measure the variation that the light rate is returned on the Cold Mirrors surface, convert out the micro-water content of measured gas in conjunction with dewpoint temperature, with PPm is unit, in-site measurement extremely bothers, must go to measure one by one to the high-voltage electrical equipment scene with the dew point hygrometer of going up specialty, the data that at every turn measure are less stable all, measures simultaneously and will discharge SF
6Gas, complicated operation, response time are grown, can not be used for continuous coverage.The problem of monitoring device existence at present has following problem haply:
1) want regular area dew point hygrometer to in-site measurement, each measurement must be carried out one by one, and the in-site measurement personnel will carry out manual record, statistics, contrast, can't onlinely carry out, and also just can't realize remote monitoring.
2) each measurement all must be from the SF of discharging some in the high-tension switch electrical equipment gas container
6Gas, environmental pollution and personnel's health has constituted serious threat.
3) the in-site measurement personnel need go each measurement data of measuring one by one unstable with equipment such as dew point hygrometers to the High-Voltage Electrical Appliances scene, and perhaps several changing values were just arranged in one day.Therefore measure inaccurate, low precision.
Summary of the invention
The objective of the invention is shortcoming, a kind of high-voltage switch gear electrical equipment SF that can be embodied in line measurement and remote monitoring is provided at the prior art existence
6Gas water content on-line monitoring device.
The present invention seeks to realize like this: a kind of high-tension switch electrical equipment SF
6Gas water content on-line monitoring device is characterized in that it mainly comprises modular power source, three kinds of signal Processing amplifying circuits, multicircuit switch, A/D converter, single-chip microcomputer, communication change-over circuit and can be to three SF in A, B, the C three-phase transfer high-voltage switch gear
6Three temperature sensors that air chamber is measured simultaneously, three pressure units, three humidity sensors etc.; Wherein, connection between them: A phase pressure transmitter 1 and A phase pressure signal Processing amplifying circuit 10 join, A phase temperature sensor 2 and A processes temperature signal amplifying circuit 11 mutually join, A phase humidity sensor 3 and moisture signal amplification treatment circuit 12 join, B phase pressure transmitter 4 and B phase pressure signal Processing amplifying circuit 13 join, B phase temperature sensor 5 and B temperature signal amplification treatment circuit 14 mutually join, B phase humidity sensor 6 and B moisture signal amplification treatment circuit 15 mutually join, C phase pressure transmitter 7 and C phase pressure signal processing circuit 16 join, C phase temperature sensor 8 and C processes temperature signal amplifying circuit 17 mutually join, and C phase humidity sensor 9 and C moisture signal mutually handle amplifying circuit 18 and join; A phase pressure signal Processing amplifying circuit 10, A phase processes temperature signal amplifying circuit 11, A phase moisture signal handle amplifying circuit 12, B phase pressure signal Processing amplifying circuit 13, B phase processes temperature signal amplifying circuit 14, B phase moisture signal handle amplifying circuit 15, C phase pressure signal Processing amplifying circuit 16, C phase processes temperature signal amplifying circuit 17, C phase moisture signal handle amplifying circuit 18 respectively with multicircuit switch circuit 19 input ends mutually and connect; Multicircuit switch circuit 19 output terminals and A/D change-over circuit 20 input ends join; A/D change-over circuit 20 output terminals and singlechip CPU circuit 21 input ends 2 join; Single-chip microcomputer 21 output terminals 1 and Rs485 communication change-over circuit 22 join; Module power supply circuit 25 input termination DC/AC 220V or DC/AC 110V power supplys, output end voltage are respectively+5V ,-5V ,+12V ,-12V four tunnel respectively and each interlock circuit power input join.
Described a kind of high-tension switch electrical equipment SF
6Gas water content on-line monitoring device is characterized in that also comprising that single-chip microcomputer 21 output terminals 2 in the above-mentioned real-time process and demonstration and warning circuit 23 join, and singlechip CPU circuit 21 input ends 2,3 and address encoding circuit 24 join.
The present invention and SF of the prior art
6The little water on-line monitoring of gas is compared, and has following advantage:
(1) realizes real time on-line monitoring and remote monitoring
Whole measuring system mainly is made up of collection in worksite measuring unit and mainframe computer system, hanging wire operation for a long time.Gather measuring unit monitoring real time data is sent to principal computer (host computer) by its Rs485 interface circuit, upper computer software can compare by predefined alarm threshold, provides warning message and signal.Change methods such as electrolysis in the past, condensation and want the monitoring mode of regular area instrument to in-site measurement inconvenience, inaccurate and operational hazards, thus realization on-line monitoring and remote monitoring.
(2) high precision, high reliability
SF
6The little water on-line measurement of gas device all adopts the various sensors of import and large scale integrated circuit to form, and mainly comprises pressure transducer, temperature sensor, humidity sensor, signal amplification circuit, multicircuit switch, 12 compositions such as A/D change-over circuit, Inter80C196C, CPU, Rs485 interface circuit.Each survey sensor is through inner each the circuit modifications compensation of transmitter, and the output linearity is good, and its overall measurement precision is: the humidity precision is higher than national standard more than one times; Density accuracy more is much higher than density monitor.The three-in-one transmitter of monitor structurally partly combines together with processing of circuit, has reduced the interference under the high-frequency electric field environment, has improved the reliability of circuit working.
(3) structure uniqueness, modern design, and be applicable to high-frequency electric field environment and outdoor environment
Sensor, collecting unit, power supply, data processing and analysis circuit, Rs485 circuit and CPU etc. are installed in the same casing; And the sampled measurements unit adopts the cast aluminium alloy structure, has characteristics such as waterproof, antivibration, resistant to rust, anti-strong magnetic interference; And this monitoring device adopts totally-enclosed design; Therefore good looking appearance, easy for installation not only, and be applicable to high-frequency electric field environment and outdoor environment.
(4) data are accurate, read convenient and practical
The data of host computer can realize that the mis system of teletransmission and power consumer is connected by Modell, broadband or other form, and the arbitrary computing machine in electric system all can read relevant data at any time, analyzes SF
6(as real-time data, the change curve etc.) for information about of gas density, temperature, pressure, and the corresponding gas humidity can calculate 20 ℃ the time.Therefore this monitoring device has the convenient and measurement data of reading of data advantage accurately, has solved dew point hygrometer off-line type SF
6The test data shakiness, the response time is long, shortcomings such as measuring operation complexity.
(5) has environment protection significance
SF
6Gas can not only destroy earth's ozone layer as a kind of fluoride, and is one of harmful gas that produces greenhouse effect, under arcing, is a kind of extremely chemicals of poison (minute quantities just consequently people desperately) after the reaction of it and water; SF
6Gas can decomposite multiple harmful substances after charged deciliter of isolating switch operated a switch, directly influence on-the-spot testing staff's physical and mental health; Traditional in addition SF
6Detection method also require certain SF
6Gaseous emission; Utilize this online pick-up unit just can change traditional SF
6Detection method has significantly reduced SF
6The gas purging amount, this is to the healthy of safeguard work personnel and alleviate environmental pollution, and very important meaning is arranged.
In sum, adopt the online measurement of real time implementation SF
6The device of the little water of gas has high practical value and realistic meaning in the reality utilization.
Description of drawings
Below in conjunction with relevant drawings and Examples concrete condition of the present invention is further described in detail.
Fig. 1 is high-tension switch electrical equipment SF of the present invention
6The electric theory diagram of gas water content on-line monitoring device.
Fig. 2 and Fig. 3 are high-tension switch electrical equipment SF of the present invention
6The circuit diagram of gas water content on-line monitoring device.
In the block diagram: 1, A phase pressure transmitter; 2, A phase temperature sensor; 3, A phase humidity sensor; 4, B phase pressure transmitter; 5, B phase temperature sensor; 6, B phase humidity sensor; 7, C phase pressure transmitter; 8, C phase temperature sensor; 9, C phase humidity sensor; 10, A phase pressure signal Processing amplifying circuit; 11, A phase processes temperature signal amplifying circuit; 12, A phase moisture signal is handled amplifying circuit; 13, B phase pressure signal Processing amplifying circuit; 14, B phase processes temperature signal amplifying circuit; 15, B phase moisture signal is handled amplifying circuit; 16, C phase pressure signal Processing amplifying circuit; 17, C phase processes temperature signal amplifying circuit; 18, C phase moisture signal is handled amplifying circuit; 19, multicircuit switch circuit; 20, A/D change-over circuit; 21, singlechip CPU circuit; 22, Rs485 communication change-over circuit; 23, demonstration and warning circuit; 24, address encoding circuit; 25, module power supply circuit.
Embodiment
As shown in Figure 1, its circuit is connected to: A phase pressure transmitter 1 and A phase pressure signal Processing amplifying circuit 10 join; A phase temperature sensor 2 and A processes temperature signal amplifying circuit 11 mutually join; A phase humidity sensor 3 and moisture signal amplification treatment circuit 12 join; B phase pressure transmitter 4 and B phase pressure signal Processing amplifying circuit 13 join; B phase temperature sensor 5 and B temperature signal amplification treatment circuit 14 mutually join; B phase humidity sensor 6 and B moisture signal amplification treatment circuit 15 mutually join; C phase pressure transmitter 7 and C phase pressure signal processing circuit 16 join; C phase temperature sensor 8 and C temperature sensor 17 mutually join; C phase humidity sensor 9 and C moisture signal mutually handle amplifying circuit 18 and join; A phase pressure signal Processing amplifying circuit 10, A phase processes temperature signal amplifying circuit 11, A phase moisture signal handle amplifying circuit 12, B phase pressure signal Processing amplifying circuit 13, B phase processes temperature signal amplifying circuit 14, B phase moisture signal handle amplifying circuit 15, C phase pressure signal Processing amplifying circuit 16, C phase processes temperature signal amplifying circuit 17 and C mutually moisture signal handle amplifying circuit 18 respectively with multicircuit switch circuit 19 input ends mutually and connect; Multicircuit switch circuit 19 output terminals and A/D change-over circuit 20 output terminals join; A/D change-over circuit 20 output terminals and singlechip CPU circuit 21 input ends 2 join; Singlechip CPU circuit 21 output terminals 1 and Rs485 communication change-over circuit 22 join; Singlechip CPU circuit 21 output terminals 2 and demonstration and warning circuit 23 join, and singlechip CPU circuit 21 input ends 2,3 and address encoding circuit 24 join; Module power supply circuit 25 input termination AC/DC220V or AC/DC110V power supplys; Output end voltage is respectively+5V ,-5V ,+12V ,-12V four road and each interlock circuit (1-24) power input join.
A, B, pressure in the C three-phase container, temperature, humidity is amplified by separately signal Processing amplifying circuit respectively by the resultant relevant measurement output valve of 9 sensors of three-phase or transmitter respectively, obtain the amplitude of being correlated with after the processing, after behind multicircuit switch circuit 19 gatings, deliver to A/D change-over circuit 20 and carry out the A/D conversion, digital signal after A/D conversion again, deliver to singlechip CPU circuit 21 input ends, cpu circuit 21 (being single-chip microcomputer) calculates each relevant numerical value, CPU compares each numerical value and former all setting values, relevant data content and alarm condition are come out by liquid crystal display, and host computer is delivered in all addresses and data by Rs485 communicating circuit 22, compare in real time when singlechip CPU is all states and data simultaneously, and giving display alarm by showing with warning circuit 23, the user is informed at the scene.
Fig. 2 and Fig. 3 are high-tension switch electrical equipment SF of the present invention
6The circuit diagram of gas water content on-line monitoring device.
High-voltage electrical equipment A, B, C three-phase SF will be placed respectively
6Three pressure units, 1,4,7 signal output parts of gas container interior A, B, C three-phase are handled amplifying circuit 10,13,16 input ends with the pressure signal of correspondence respectively and are joined; A, B, the input of C three-phase pressure signal is respectively YLA, YLB, YLC represents that (YL is first letter of Chinese pressure, A, B, C represents the phase content of three-phase), that is: YLA becomes feed signals 1 for the A phase pressure, YLB becomes feed signals 4 for the B phase pressure, YLC becomes feed signals 7 for the C phase pressure, pressure signal is handled amplifying circuit 10,13,16 respectively with pressure unit 1,4, the current signal that 7 measured pressure are exported converts voltage signal (its three pressure units 1 of 0--2V to, 4,7 output signal standard electric rheology feed signals 4--20mA, precision is 0.25 grade, range is: 0-1Mpa, it is relevant with hickey that pressure unit adopts requirement to have only, and it is best adopting M15); A, B, C three-phase SF will be placed respectively
6The output terminal of three temperature sensors 2,5,8 in the gas container joins with processes temperature signal circuit 11,14,17 input ends respectively; A, B, the input of C three-phase temperature are respectively WDA, WDB, WDC represents (first letter that WD represents Chinese temperature); Processes temperature signal circuit 11,14,17 respectively 2,5, the 8 measured temperature signals of the temperature sensor in three containers are converted to 0--2V voltage signal (its temperature sensor model be KD590, KD591, SP08 etc. preferably adopt KD590, SOP the encapsulation, measurement range is-40 ℃～+ 120 ℃, precision ± 0.5 ℃); A, B, C three-phase SF will be placed respectively
6The output terminal of the low humidity sensor 3,6,9 in the gas container joins with moisture signal treatment circuit 12,15,18 input ends respectively, and A, B, the input of C three-phase humidity are respectively SDA, SDB, SDC represents (first letter that SD represents Chinese humidity); Moisture signal is handled the voltage signal that amplifying circuit 12,15,18 converts A, B, C three- phase humidity sensor 3,6,9 measured three-phase moisture signals to 0--2V respectively, and (model that its humidity sensor adopts U.S. Humirel company to produce is a HM1520 low humidity sensor, and the moisture measurement scope is 10PPm～5000PPm); In order accurately to measure A, B, temperature in the C three-phase, pressure, the signal of humidity, with A, B, the pressure signal of C three-phase is handled amplifying circuit 10,13,16 output terminal, A, B, the processes temperature signal amplifying circuit 11 of C three-phase, 14,17 output terminal, A, B, the C moisture signal is handled amplifying circuit 12,15,18 output terminal is delivered to the input end of multicircuit switch circuit 19 respectively, and (the multicircuit switch circuit is that the model that U.S. AD company produces is AD7506, be only quick 16 to select 1 switch, input end is the 11st pin, the 19th pin to the 26 pin), output terminal the 28th pin of multicircuit switch circuit 19 is imported through U12D the 12nd pin, the 14th pin output terminal and A/D change-over circuit 20 input ends are 13 pin join (12 bit A/D converters that A/D change-over circuit 20 adopts MC companies to produce, model is MC1674).Input end P3 mouth (the 53rd to 60 pin) mutually and connect in A/D change-over circuit output terminal the 16th pin to 27 pin and the singlechip CPU, singlechip CPU circuit 21 input end P0 mouths be the 4th pin to 11 pin connect eight plucking number sign switch SW, on draw exclusion RPI mutually and connect, SW other end ground connection, another termination of RPI 5V power supply; Singlechip CPU circuit 21 output terminal P2.0 and P2.1 mouth and Rs485 communication change-over circuit input end 22 join, the 18th pin of cpu circuit 21 and the 4th pin of interface circuit 22 joins, the 1st pin of the 17th pin and interface circuit 22 joins; The 2nd, 3 pin of cpu circuit 21 the 28th pin and interface circuit 22 join (Rs485 communication change-over circuit is MAX485 or the 65BC184 that MAX company produces); Interface circuit 22 with Rs485 output end of main (5,6 pin) by communication converter and host computer join, its 8th pin meets 5V, the 5th pin ground connection; The output terminal 2 of singlechip CPU circuit 21 and demonstration and warning circuit 23 join; The output terminal 2 of cpu circuit 21 is the P3 mouth of CPU, and the P3 mouth is that serial mode and demonstration and warning circuit 23 join (show and adopt 240128 lattice lcd screen, the wide temperature range type of selecting for use smart electric company in Hong Kong or Taiwan Tai Wei company to produce with warning circuit); Singlechip CPU circuit 21 input ends 2 and address encoding circuit 24 join, and (coding adopts binary-coded decimal, be that eight toggle switchs are to determine the numbering of this measurement mechanism), it is consistent with the address code that host computer sets to make single-chip microcomputer (computing machine) can effectively discern the measured content of this device; Module power supply circuit 25 is working powers that this device provides, the input end of working power joins by DC/AC220V in connection terminal and the electric substation or DC/AC110V, output terminal joins with each circuit and sensor respectively, output end voltage is respectively+5V ,-5V ,+12V ,-output of 12V four loops, amounting to power is (the module model of selecting for use Xing Yuanjia safe company in Beijing to produce is XR15-4) about 15W.SF of the measurement that total system can be real-time in a word
6SF in three containers of high-voltage electrical equipment A, B, C three-phase
6The real-time pressure of gas, humidity, temperature, and can calculate relative density by real-time measured value, pressure in the time of 20 ℃, humidity etc., system can also set thresholding, exceed the thresholding setting value if any the numerical value of measuring and promptly can send warning, device also sends to host computer by the RS485 communication, and the arbitrary computing machine in transformer station and electric power LAN (Local Area Network) all can be consulted.
The model that the present invention has adopted U.S. Humirel company to produce is a HM1520 low humidity sensor, and the moisture measurement scope is that 10PPm～5000PPm) has satisfied the SF in the High-Voltage Electrical Appliances container especially
6The low humidity characteristic test of gas.Past HM1520 is low, and wet sensor applies to the high precision moisture measurement always, and the difficult control of the linearity etc. are never at High-Voltage Electrical Appliances SF
6Use in the gasmetry.So high-tension switch electrical equipment SF of the present invention
6Gas water content on-line monitoring device uses the low wet sensor of MH1520 to SF
6The moisture measurement of gas has substantive meaning.Adopt the combination of pressure unit, temperature sensor and humidity sensor simultaneously, make the internal relation between temperature, pressure, the humidity obtain real-time measurement and statistics, be SF
6The gaseous state on-line measurement provides technique guarantee.
Claims (3)
1, a kind of high-tension switch electrical equipment SF
6Gas water content on-line monitoring device is characterized in that it mainly comprises modular power source, three kinds of signal Processing amplifying circuits, multicircuit switch, A/D converter, single-chip microcomputer, communication change-over circuit and can be to three SF in A, B, the C three-phase transfer high-voltage switch gear
6Three temperature sensors that air chamber is measured simultaneously, three pressure units, three humidity sensors etc.; Wherein, the connection between them; A phase pressure transmitter (1) and A phase pressure signal Processing amplifying circuit (10) join, A phase temperature sensor (2) and A processes temperature signal amplifying circuit (11) mutually join, A phase humidity sensor (3) and moisture signal amplification treatment circuit (12) join, B phase pressure transmitter (4) and B phase pressure signal Processing amplifying circuit (13) join, B phase temperature sensor (5) and B temperature signal amplification treatment circuit (14) mutually join, B phase humidity sensor (6) and B moisture signal amplification treatment circuit (15) mutually join, C phase pressure transmitter (7) and C phase pressure signal processing circuit (16) join, C phase temperature sensor (8) and C processes temperature signal amplifying circuit (17) mutually join, and C phase humidity sensor (9) and C moisture signal mutually handle amplifying circuit (18) and join; A phase pressure signal Processing amplifying circuit (10), A phase processes temperature signal amplifying circuit (11), A phase moisture signal is handled amplifying circuit (12), B phase pressure signal Processing amplifying circuit (13), B phase processes temperature signal amplifying circuit (14), B phase moisture signal is handled amplifying circuit (15), C phase pressure signal Processing amplifying circuit (16), C phase processes temperature signal amplifying circuit (17), C phase moisture signal handle amplifying circuit (18) respectively with multicircuit switch circuit (19) input end mutually and connect; Multicircuit switch circuit (19) output terminal and A/D change-over circuit (20) input end join; A/D change-over circuit (20) output terminal and singlechip CPU circuit (21) input end 2 join; Singlechip CPU circuit (21) output terminal (1) and Rs485 communication change-over circuit (22) join; Module power supply circuit (25) input termination DC/AC 220V or DC/AC 110V power supply, output end voltage be respectively+5V ,-5V ,+12V ,-12V four road and each interlock circuit power input join.
2, a kind of high-tension switch electrical equipment SF according to claim 1
6Gas water content on-line monitoring device is characterized in that also comprising that singlechip CPU circuit (21) output terminal 2 and demonstration and warning circuit (23) join, and singlechip CPU circuit (21) input end 2,3 and address encoding circuit (24) join.
3. a kind of high-tension switch electrical equipment SF according to claim 1 and 2
6Gas water content on-line monitoring device is characterized in that A, B, C phase humidity sensor (3), (6), (9) are that the model that adopts U.S. Humirel company to produce is a HM1520 low humidity sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510085675 CN1725015A (en) | 2004-10-10 | 2005-07-26 | High-tension switch electrical equipment SF6 gas water content on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200410067121 | 2004-10-10 | ||
| CN200410067121.4 | 2004-10-10 | ||
| CN 200510085675 CN1725015A (en) | 2004-10-10 | 2005-07-26 | High-tension switch electrical equipment SF6 gas water content on-line monitoring device |
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| CN1725015A true CN1725015A (en) | 2006-01-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498754B (en) * | 2008-02-02 | 2011-08-10 | 陕西电力科学研究院 | Method and device for judging SF6 electrical equipment malfunction by utilizing SF6 pressure fluctuation |
| CN102508467A (en) * | 2011-10-18 | 2012-06-20 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102508074A (en) * | 2011-11-03 | 2012-06-20 | 四川电力科学研究院 | Internal overheat fault monitoring method of metal sealed gas-insulated switchgear |
| CN104076127A (en) * | 2014-07-15 | 2014-10-01 | 国家电网公司 | Device for testing accuracy of sulfur hexafluoride humidity sensor |
| CN105806901A (en) * | 2016-05-09 | 2016-07-27 | 武汉天富海科技发展有限公司 | Device for testing humidity of high-voltage switch component |
-
2005
- 2005-07-26 CN CN 200510085675 patent/CN1725015A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498754B (en) * | 2008-02-02 | 2011-08-10 | 陕西电力科学研究院 | Method and device for judging SF6 electrical equipment malfunction by utilizing SF6 pressure fluctuation |
| CN102508467A (en) * | 2011-10-18 | 2012-06-20 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102508467B (en) * | 2011-10-18 | 2014-03-12 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102508074A (en) * | 2011-11-03 | 2012-06-20 | 四川电力科学研究院 | Internal overheat fault monitoring method of metal sealed gas-insulated switchgear |
| CN102508074B (en) * | 2011-11-03 | 2013-10-16 | 四川电力科学研究院 | Internal overheat fault monitoring method of metal sealed gas-insulated switchgear |
| CN104076127A (en) * | 2014-07-15 | 2014-10-01 | 国家电网公司 | Device for testing accuracy of sulfur hexafluoride humidity sensor |
| CN104076127B (en) * | 2014-07-15 | 2015-09-30 | 国家电网公司 | A kind of sulfur hexafluoride humidity sensor accuracy pick-up unit |
| CN105806901A (en) * | 2016-05-09 | 2016-07-27 | 武汉天富海科技发展有限公司 | Device for testing humidity of high-voltage switch component |
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Effective date of registration: 20051216 Address after: No. 25, pioneering Road, Cangnan County, Zhejiang Province Applicant after: Chen Hu Address before: Zhejiang province Cangnan County Lingxi Town Gate Street No. 20 Applicant before: Chen Shuxin |
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Open date: 20060125 |