CN204302440U - Can to multiple stage SF 6insulation of electrical installation state and moisture carry out the device of on-line monitoring - Google Patents
Can to multiple stage SF 6insulation of electrical installation state and moisture carry out the device of on-line monitoring Download PDFInfo
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- CN204302440U CN204302440U CN201420785093.9U CN201420785093U CN204302440U CN 204302440 U CN204302440 U CN 204302440U CN 201420785093 U CN201420785093 U CN 201420785093U CN 204302440 U CN204302440 U CN 204302440U
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Abstract
The utility model discloses one can to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, and it comprises the SF of more than two
6electrical equipment, at every platform SF
6the interface valve of electrical equipment is connected to circulation three way, circulation three way has been interconnected gas circulatory monitoring pipe, gas circulatory monitoring pipe is connected with control solenoid valve, shared SF
6purity on-Line Monitor Device, vacuum extractor and return-air control device, at SF
6independently SO is connected by take-off pipe after purity on-Line Monitor Device
2content detection device is serially connected with shared buffer air chamber on gas circulatory monitoring pipe, and buffer air chamber is connected with the second pressure transducer and micro-water sensor.The utility model achieves separate unit on-Line Monitor Device simultaneously to multiple stage SF
6insulation electrical equipment carries out SO
2content and SF
6the Real-Time Monitoring of purity, ensures that the detected gas of multiple devices does not mix mutually, considerably reduces cost, is beneficial to and implements generally to apply in the transformer station of voltage levels or booster stations.
Description
Technical field
The utility model relates to one can to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, belong to electrical net detect technical field.
Background technology
SF6 electric insulation equipment because of structure simple, the advantages such as maintenance is few, are widely used in high voltage field.But, along with the increase running the age, there is many problems.In recent years, once repeatedly there is the large area blackout (part) that the SF6 current transformer internal discharge fault of 500kV voltage device grade causes in Southern Power Grid Company and State Grid Corporation of China.In addition, also there is the line outage accident (part) that a lot of internal discharge fault causes in isolating switch.The electric discharge decomposition product SO2 that SF6 gas produces when discharging all is detected in the electrical equipment of these fault phases.Research shows, latency discharge fault also can produce a small amount of SO2, be the effective means judging operational outfit internal state by detecting SO2 component and content in SF6 insulation electrical equipment, on-line monitoring solves the key issue of monitoring a small amount of SO2 content and rate of rise.In addition, SF6 insulation electrical equipment ubiquity because of design, manufacture, install and the problem such as operation maintenance is improper, and cause the slow leakage of high voltage electric equipment SF6 gas.On the one hand, the leakage of SF6 gas can reduce the insulating property of equipment, affects the safe operation of equipment, even can cause equipment failure.On the other hand, SF6 gas has strong greenhouse effect, and be 23900 times of CO2, its leakage will cause severe contamination to atmospheric environment.Mainly adopt off-line type to the detection means that SF6 electrical equipment leaks at present, on-line monitoring can solve the problem that monitoring SF6 in real time slowly leaks.
Guizhou Power Test Institute successfully develops separate unit on-Line Monitor Device and carries out state on_line monitoring to single-phase SF6 current transformer or isolating switch, its notification number is CN202854298U, and patent name is sulfur hexafluoride inflatable-type isolating switch insulation state on-line monitoring device.But in use find, separate unit is relatively high to single-phase on-line monitoring cost, is unfavorable for that popularity is applied.
Simultaneously in the parameters of SF6 electrical equipment blanket gas SF6, moisture is wherein very important index.For this reason standard GB/T/T8905 " in SF6 electrical equipment gas delivery and detect directive/guide ", regulation has been done to the moisture of gas, in the normal SF6 electrical equipment run, the content of moisture is very low.In gas, the impact of micro-moisture on SF6 electrical equipment is very large, is mainly manifested in: the exceed standard insulation of electrical installation performance brought of moisture reduces, and causes high-voltage breakdown.Near two end electrodes, produce shelf depreciation because insulating capacity declines, the time has been grown and has caused connectivity flashover, directly affects the break performance of SF6 electrical equipment.This be due to SF6 decomposed by electric arc after form SF+4, SF+2, SF+5 and negative ion F-2, F-, SF-, the existence of moisture plays inhibition to the recovery of dielectric strength between the compound of analyte and fracture.Electric arc analyte and SF6 produce HF and H2SO4 through hydrolysis, can produce corrosive attack, affect the serviceable life of SF6 electrical equipment to some metal object and insulating part.To this, the moisture in gas in the use procedure of SF6 electrical equipment, regularly and irregularly must be detected.The basic mode of current employing is that the use producer of switch engages metrological service or self utilizes portable micro-water calibrating installation to detect moisture in gas.Its detection method is fixed on the gas filling mouth of SF6 electrical equipment by this device, release SF6 gas.Because the moisture in the external world is higher than measurement of moisture content of gas in SF6 electrical equipment tens times, therefore need release just can reach test balance at least about 10 min.Release gas cannot reclaim, and cause serious waste to blanket gas in tank body, the SF6 gas of discharge causes certain pollution to air, and therefore how rationally the moisture detected in SF6 electrical equipment is the problem needing to solve.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of low cost, can to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, can overcome the deficiencies in the prior art
The technical solution of the utility model is: can to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, and it comprises the SF of more than two
6electrical equipment, at every platform SF
6the interface valve of electrical equipment is connected to circulation three way, circulation three way has been interconnected gas circulatory monitoring pipe, gas circulatory monitoring pipe is connected with control solenoid valve, shared SF
6purity on-Line Monitor Device, vacuum extractor and return-air control device, at SF
6independently SO is connected by take-off pipe after purity on-Line Monitor Device
2content detection device, SO
2the quantity of content detection device and SF
6the quantity of electrical equipment is identical; Gas circulatory monitoring pipe is serially connected with shared buffer air chamber, buffer air chamber is connected with the second pressure transducer and micro-water sensor.
Described SF
6purity on-Line Monitor Device comprises the reduction valve be serially connected on pipeline, demarcates air inlet threeway, first-class gauge and SF
6purity infrared sensor, at SF
6purity infrared sensor is connected with the first pressure transducer.
Described SO
2content detection device is by SO
2electrochemical sensor and the solenoid valve be connected in its import and outlet are formed.
Gas circulatory monitoring pipe is serially connected with shared buffer air chamber, buffer air chamber is connected with the second pressure transducer.
Gas circulatory monitoring pipe is connected with environment temperature sensor and environment SF
6leak infrared sensor.
Compared with the prior art, the utility model is optimized on the basis of single SF6 insulation electrical equipment at existing single monitoring equipment, have devised separate unit on-Line Monitor Device carries out SO2 content and SF6 purity simultaneously Real-Time Monitoring to multiple stage SF6 insulation electrical equipment, ensure that the gas that multiple devices are detected does not mix mutually, and the accuracy of analyte SO2 content detection is high, precision reaches 1 μ L/L.With single, the on-line monitoring system of list is compared, considerably reduce cost, be beneficial to and implement generally to apply in the transformer station of voltage levels or booster stations.For realizing list to many technological means, gas circulatory monitoring pipe being connected with a large amount of control solenoid valves, being the reliability ensureing solenoid valve, taking following measures: 1 chooses the little solenoid valve of wire resistor when volume is determined.2. do not carry out energising for a long time to solenoid valve to run, avoid electromagnetic valve coil to generate heat hot as far as possible.At measurement air chamber, pressure transducer is housed, buffer air chamber is also equipped with pressure transducer, monitor these two pressure transducers value can failure judgement relay probably at which position, thus reduce investigation scope.Environment temperature sensor, testing environment temperature, carries out temperature compensation to surveyed data;-environment SF6 leaks infrared sensor, the impermeability of monitoring gas circuit, alarm in Leakage Gas to environment.Adopt independently SO2 content detection device, and solenoid valve is set in import and outlet, SO2 electrochemical sensor can be avoided like this to affect precision after evacuation.
The buffer air chamber of this cover system connects micro-water sensor, and micro-like this water sensor just can to SF
6moisture in electrical equipment detects, and after detecting, gas can also return original SF
6electrical equipment, can well solve produced problem in background technology.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Wherein: 1-SF
6electrical equipment, 2-circulation three way, 3-gas circulatory monitoring pipe; 4-filtrator, 5-threeway, 6-four-way; 7-vacuum pump, 8-vacuumizes with ball valve, 9-electrically controlled 4-way transfer valve (this transfer valve can any two logical, threeway, four-way or totally-enclosed); 10-vacuum pressed pump, 11-second pressure transducer, 12-ten No. two solenoid valves, 13-ten No. three solenoid valves, 14-ten No. four solenoid valves, 15-ten No. five solenoid valves, 16-buffer air chamber, 17-ten No. seven solenoid valves, 18-demarcates threeway of giving vent to anger, 19-ten No. nine solenoid valves, 20 second gauge, 21-reduction valve, 22-demarcates air inlet threeway, controls hand valve be connected with demarcation; 23, first-class gauge, 24-SF
6purity infrared sensor, 25-first pressure transducer, 26-20 No. six solenoid valves; 27-20 No. seven solenoid valves, 28-the 2nd SO
2electrochemical sensor, 29-20 No. nine solenoid valves, 30-tri-No. ten solenoid valves, 31-the one SO
2electrochemical sensor, 32 30 No. two solenoid valves, 33-30 No. three solenoid valves, 34-Three S's O
2electrochemical sensor, the micro-water sensor of 35-.
Embodiment
embodiment 1:the present embodiment is with three SF
6be described based on electrical equipment,
as shown in Figure 1: at three SF
6the interface valve of electrical equipment 1 connects respectively filtrator 4 and circulation three way 2, the gas circulatory monitoring pipe 3 that can realize gas circuit and be interconnected is built by circulation three way 2, what will realize because of this device is that a pick-up unit is simultaneously to the detection of three equipment, namely need to realize detecting one by one, measuring one by one, gas and vapor permeation need be prevented, and the gas surveyed in measuring process all need push back equipment under test; Simultaneously because of SO
2electrochemical sensor needs to avoid vacuumizing in use, therefore when building gas circulatory monitoring pipe 3, gas circulatory monitoring pipe 3 is connected with the solenoid valve of numerous control gas flows, threeway 5 and four-way 6; It comprises control three SF
6ten No. three solenoid valves, 13, ten No. four solenoid valves, 14, ten No. five solenoid valves 15 that electrical equipment is given vent to anger; Control ten No. seven solenoid valves, 17, ten No. nine solenoid valves 19 of gas flow, this covering device shared device is mainly shared SF
6purity on-Line Monitor Device, vacuum extractor and return-air control device; Because of SO
2electrochemical sensor can not vacuumize, at SF
6independently SO is connected with by take-off pipe (four-way) after purity on-Line Monitor Device
2content detection device, SO
2the quantity of content detection device and SF
6the quantity of electrical equipment 1 is identical.SF
6purity on-Line Monitor Device comprises the reduction valve 21 be serially connected on pipeline, demarcates air inlet threeway 22, first-class gauge 23 and SF
6purity infrared sensor 24, at SF
6purity infrared sensor 24 is connected with the first pressure transducer 25, the port demarcating air inlet threeway 22 is used for logical marked gas.SO
2content detection device is by SO
2electrochemical sensor and the solenoid valve be connected in its import and outlet are formed, three SO in figure
2electrochemical sensor is respectively a SO
2electrochemical sensor 31, the 2nd SO
2electrochemical sensor 28, Three S's O
2electrochemical sensor 34 represents, a SO
2the solenoid valve at electrochemical sensor 31 two ends is respectively three No. ten solenoid valves 30 and 30 No. two solenoid valves 32; 2nd SO
2the solenoid valve at electrochemical sensor 28 two ends is respectively 20 No. seven solenoid valves 27 and 20 No. nine solenoid valves 29; Three S's O
2the solenoid valve at electrochemical sensor 34 two ends is respectively 30 No. three solenoid valves 33 and 20 No. six solenoid valves 26; Gas circulatory monitoring pipe 3 is serially connected with shared buffer air chamber 16 second gauge 20 and demarcation to give vent to anger threeway 18, buffer air chamber 16 is connected with the second pressure transducer 11 and the micro-water sensor 35 for detecting moisture; On gas circulatory monitoring pipe 3, be connected with environment temperature sensor and environment SF simultaneously
6leak infrared sensor.
Need to carry out entirety after equipment installation to vacuumize, following 3 steps of experience:
1, transducer calibration, sensor comprises SF6 purity infrared sensor 24 and SO2 electrochemical sensor, gas is from demarcation air intake opening to calibrating gas port, after transducer calibration completes, in calibration process dotted line frame, gas does not vacuumize, and the residual gas entered in buffer air chamber 16 solves finally by when vacuumizing.
2, with the gas in pure SF6 gas displacement dotted line frame, in replacement process dotted line frame, gas does not vacuumize, and replaces substantially identical with timing signal operating process.
3, vacuum pumping is carried out, the road of opening ten No. three solenoid valves, 13, ten No. four solenoid valves, 14, ten No. five solenoid valves, 15, ten No. seven solenoid valves, 17, ten No. nine solenoid valves, 19, ten No. two solenoid valves 12 and electrically controlled 4-way transfer valve 9(tetra-all communicates), adjust flux valve makes gas flow be stabilized in maximum flow, open and vacuumize with ball valve 8, at vacuum orifice access vacuum pump 7, start to vacuumize, until 2 tensimeters reach vacuum instruction, close all solenoid valves, electrically controlled 4-way transfer valve 9 and vacuumize with ball valve 8.
Equipment just can start after completing and vacuumizing to measure, and measures following 3 steps of experience:
1, ten No. three solenoid valves, 13, ten No. seven solenoid valves, 17, three No. ten solenoid valves, 30,30 No. two solenoid valves 32 are opened.The gas of left side First SF6 electrical equipment 1 is adjusted to after 2 atmospheric pressure through reduction valve, measuring unit is entered with 200mL/min, because buffer air chamber 16 is vacuum, all gas flows enter buffer air chamber 16 after measuring air chamber, until stable rear closedown ten No. three solenoid valves, 13, three No. ten solenoid valves of measurement data 30,30 No. two solenoid valves 32.
2, vacuum pressed pump 10 is opened and residual gas in gas circuit and buffer air chamber 16 is all drawn back First SF6 electrical equipment 1 body.
3, after the measurement completing left side SF6 electrical equipment, vacuumize, the gasmetry in middle SF6 electrical equipment 1 and the SF6 electrical equipment 1 on the right repeats the step on the left side.
The utility model can realize the detection of separate unit on-Line Monitor Device to SO2 content and SF6 purity in 3 SF6 electrical equipments, but is not limited only to the detection to SO2 content and SF6 purity in 3 SF6 electrical equipments.
Claims (4)
1. an energy is to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, and it comprises the SF of more than two
6electrical equipment (1), is characterized in that: at every platform SF
6the interface valve of electrical equipment (1) is connected to circulation three way (2), circulation three way (2) has been interconnected gas circulatory monitoring pipe (3), gas circulatory monitoring pipe (3) is connected with control solenoid valve, shared SF
6purity on-Line Monitor Device, vacuum extractor and return-air control device, at SF
6independently SO is connected by take-off pipe after purity on-Line Monitor Device
2content detection device, SO
2the quantity of content detection device and SF
6the quantity of electrical equipment (1) is identical; Gas circulatory monitoring pipe (3) is serially connected with shared buffer air chamber (16), buffer air chamber (16) is connected with the second pressure transducer (11) and micro-water sensor (35).
2. according to claim 1 can to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, it is characterized in that; Described SF
6purity on-Line Monitor Device comprises the reduction valve (21) be serially connected on pipeline, demarcates air inlet threeway (22), first-class gauge (23) and SF
6purity infrared sensor (24), at SF
6purity infrared sensor (24) is connected with the first pressure transducer (25).
3. according to claim 1 can to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, it is characterized in that; SO
2content detection device is by SO
2electrochemical sensor and the solenoid valve be connected in its import and outlet are formed.
4. according to claim 1 can to multiple stage SF
6insulation of electrical installation state and moisture carry out the device of on-line monitoring, it is characterized in that; Gas circulatory monitoring pipe (3) is connected with environment temperature sensor and environment SF
6leak infrared sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420785093.9U CN204302440U (en) | 2014-12-15 | 2014-12-15 | Can to multiple stage SF 6insulation of electrical installation state and moisture carry out the device of on-line monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420785093.9U CN204302440U (en) | 2014-12-15 | 2014-12-15 | Can to multiple stage SF 6insulation of electrical installation state and moisture carry out the device of on-line monitoring |
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| Publication Number | Publication Date |
|---|---|
| CN204302440U true CN204302440U (en) | 2015-04-29 |
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ID=53107971
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|---|---|---|---|
| CN201420785093.9U Active CN204302440U (en) | 2014-12-15 | 2014-12-15 | Can to multiple stage SF 6insulation of electrical installation state and moisture carry out the device of on-line monitoring |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387549A (en) * | 2018-04-17 | 2018-08-10 | 国网电力科学研究院武汉南瑞有限责任公司 | One kind being based on the fine middle micro-water content detection method of optical detection perfluor isobutyl |
| CN108693132A (en) * | 2018-05-21 | 2018-10-23 | 郑州力创光电技术有限公司 | A kind of integrated gas analyzer and its application method based on photoelectric sensing principle |
| CN109470766A (en) * | 2018-12-21 | 2019-03-15 | 国网内蒙古东部电力有限公司电力科学研究院 | More electrical equipment SF6On-line checking gas circuit |
| CN110187066A (en) * | 2019-06-21 | 2019-08-30 | 至砾机电设备（上海）有限公司 | A kind of water oxygen grading analysis detection system and its detection method |
| CN110187067A (en) * | 2019-06-21 | 2019-08-30 | 至砾机电设备（上海）有限公司 | A kind of water oxygen particle automatic analysis system and its analysis method |
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2014
- 2014-12-15 CN CN201420785093.9U patent/CN204302440U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387549A (en) * | 2018-04-17 | 2018-08-10 | 国网电力科学研究院武汉南瑞有限责任公司 | One kind being based on the fine middle micro-water content detection method of optical detection perfluor isobutyl |
| CN108693132A (en) * | 2018-05-21 | 2018-10-23 | 郑州力创光电技术有限公司 | A kind of integrated gas analyzer and its application method based on photoelectric sensing principle |
| CN109470766A (en) * | 2018-12-21 | 2019-03-15 | 国网内蒙古东部电力有限公司电力科学研究院 | More electrical equipment SF6On-line checking gas circuit |
| CN110187066A (en) * | 2019-06-21 | 2019-08-30 | 至砾机电设备（上海）有限公司 | A kind of water oxygen grading analysis detection system and its detection method |
| CN110187067A (en) * | 2019-06-21 | 2019-08-30 | 至砾机电设备（上海）有限公司 | A kind of water oxygen particle automatic analysis system and its analysis method |
| CN110187066B (en) * | 2019-06-21 | 2024-03-19 | 上海至纯系统集成有限公司 | Water-oxygen particle analysis and detection system and detection method thereof |
| CN110187067B (en) * | 2019-06-21 | 2024-03-22 | 上海至纯系统集成有限公司 | Water-oxygen particle automatic analysis system and analysis method thereof |
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| GR01 | Patent grant |