CN104297431A - Online SF6 gas micro-water monitoring device, system and method of high-voltage electrical equipment - Google Patents
Online SF6 gas micro-water monitoring device, system and method of high-voltage electrical equipment Download PDFInfo
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- CN104297431A CN104297431A CN201410562502.3A CN201410562502A CN104297431A CN 104297431 A CN104297431 A CN 104297431A CN 201410562502 A CN201410562502 A CN 201410562502A CN 104297431 A CN104297431 A CN 104297431A
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Abstract
The invention discloses an online SF6 gas micro-water monitoring device, method and system of high-voltage electrical equipment. The device comprises a computer data processing system, a gas circulation mechanism and a micro-water detector which is used for detecting gas in the gas circulation mechanism, wherein the gas circulation mechanism comprises a gas cylinder, a piston and a driving device which can drive the piston to move back and forth in the gas cylinder; a circulation ventilating opening communicated with an SF6 gas storage chamber in the high-voltage electrical equipment in a sealing manner is arranged on the gas cylinder; and the gas circulation mechanism is arranged in a sealed cavity. According to the SF6 gas monitoring device, method and system, gas in the SF6 gas storage chamber in the high-voltage electrical equipment is circulated into the gas cylinder outside the high-voltage electrical equipment by virtue of the sealed gas circulation mechanism, so that the humidity at sampling points inside and outside the SF6 gas storage chamber can be rapidly balanced; and then the accurate measurement is carried out by the micro-water detector, so that a large amount of SF6 gas does not need to be discharged, the detection result is accurate and the performance safety of the device and the system are ensured.
Description
Technical field
The present invention relates to technical field of electric power, be specifically related to the micro-water on-Line Monitor Device of a kind of high voltage electric equipment SF6 gas, system and method.
Background technology
At present, SF
6(sulfur hexafluoride) electrical equipment has been widely used in power department, industrial and mining enterprises, facilitates the fast development of power industry.In recent years, along with rapid economic development, China's electric system capacity sharply expands, SF
6electrical equipment consumption gets more and more.SF
6the effect of gas in high voltage electric equipment is arc extinguishing and insulation, SF in high voltage electric equipment
6if the micro-water content of gas exceeds standard and density reduces and will have a strong impact on SF
6the safe operation of high voltage electric equipment: 1) in the presence of some metal objects, SF
6gas high temperature more than 200 DEG C temperature can with water generation hydrolysis reaction, generate active HF and SOF
2, etching insulative part and metalwork, and produce amount of heat, air chamber pressure is raised.2) when temperature reduces, too much moisture content may form condensation water, and insulating part surface insulation intensity is significantly reduced, and even flashover, causes serious harm.3) SF
6gas density is reduced to and to a certain degree will causes the forfeiture of insulation and arc extinction performance.Therefore grid operation codes mandatory provision, before putting equipment in service and run in all must to SF
6the bulk density and water content of gas carries out periodic detection.In order to ensure the reliability service of SF6 electrical equipment, improving the continuous reliability service ability of electric system, presence being realized to its performance and detects, monitor and failure prediction, becoming important research direction in the application of SF6 electrical equipment.Along with unattended operation transformer station is to the requirement of remote control, remote measurement, SF6 gas density value and the micro-water content of on-line monitoring SF6 electrical equipment have very important practical significance.
Be used at present monitoring SF
6gas density generally adopts a kind of SF of machinery
6gas density relay monitors SF
6gas density, namely works as SF
6when electric product occurs to leak gas, this relay can be reported to the police and locking, simultaneously can also displaying scene density value.SF is monitored with density monitor
6, there is following defect in gas density: 1) SF
6when gas leakage occurs electric product, only have when its gaseous tension drops to alarming value, just send alerting signal, and now SF
6gas have leaked a lot.Such as rated pressure is the SF of 0.6Mpa
6electrical equipment generally adopts alarm pressure to be the density monitor of 0.52Mpa, locking pressure 0.50Mpa.A lot of transformer station is all unattended operation transformer station now, like this for this SF
6electrical equipment, if leaked gas, when its gas drops to alarm pressure 0.52Mpa from rated pressure 0.6Mpa, operator on duty has just found, just notifies that maintainer removes site disposal leakage accident, and now SF
6gas have leaked a lot.2) this density monitor contact generally adopts hairspring type magnetic to help formula electric contact.During its closing of contact, its closing force is very little, and contact is closed firm not.And the most important thing is when being oxidized or pollute, the normal phenomenon that electric contact loose contact occurs, causes inefficacy, produces serious consequence.
For micro-water monitoring, main employing generally adopts off-line method to measure micro-water content at present at present: mainly adopt portable dew point hygrometer to carry out Site Detection, it exists following defect: 1) non real-time.Current power department adopts for general one year 2 times dew point hygrometer to detect SF
6the SF of electrical equipment
6gas micro water content, this is a kind of non real-time detection method, and it can not reflect the variation tendency that equipment runs, also cannot to SF
6the variation tendency of gas micro water content is predicted, the operation conditions of electrical equipment cannot be grasped, can not prevent in time and get rid of potential safety hazard, cannot by intelligent equipment repair based on condition of component standard, accurate evaluation, judgment device situation, be difficult to the repair based on condition of component realizing electrical equipment.2) measurement limits by environment temperature.The operating ambient temperature of dew point hygrometer is-10 DEG C ~+50 DEG C.Meanwhile, different environment temperatures, its measurement range is different, the winter in the north and southern summer discomfort be fit to do on-the-spot SF
6gas micro water content is tested.Owing to being subject to the impact of weather and environment temperature, the data of detection only can reference.3) time-consuming, bothersome, take gas.Adopt during dew point hygrometer test and need discharge SF for a long time
6gas, this is that before during measurement, 3-5 minute needs dry up sampling line because sampling line is containing wetly; In order to the SF of SF6 inside electric appliance can be tested
6gas micro water content, just need a certain amount of SF6 gas discharging out, the test of a usual complete and accurate about needs about 10 ~ 15 minutes.By standard sample gas flow, namely 30 ~ 40L/h calculates, and once test needs to discharge SF
6gas about 8 liters.So, after completing test several times, supplementary SF is just needed
6gas.In addition, also there is potential safety hazard in testing staff's operation lack of standardization.4) high testing cost.Electric company has been the SF that testing need be equipped with reviewer, equipment, vehicle and high value
6gas.Rough calculation, the testing cost of sharing every year of each transformer station about tens thousand of to about tens0000 yuan.5) field personnel is endangered healthy, atmosphere pollution.SF
6gas certainly as nontoxic gas, but can generate some toxic and harmfuls after pyroreaction, has great harm to the person.And SF
6gas is a kind of greenhouse gases, and international regulations directly can not enter air.
Along with unattended operation transformer station is constantly strengthened, so to SF to networking, digitizing future development and the requirement to remote control, remote measurement
6the on-line monitoring of the micro-water content state of electrical equipment has important practical significance.But carrying out micro-water on-line measurement to high voltage electric equipment air chamber is a difficult problem always.Due to the system that high voltage electric equipment air chamber is a sealing; diffusion of moisture in its stationary gas is individual slowly process; in addition main gas tank can produce different water translocations from the temperature contrast of sampled point; two kinds of factors can make humidity be difficult to reach balance, finally cause the moisture difference of main gas tank and sampled point very large.So there is the humidity measured and forbidden and can not reflect truly main gas tank in traditional micro-water on-line measurement.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of SF of high voltage electric equipment
6gas controlling device, method and system, for solving for SF
6when inside electric appliance micro-water content state is monitored, the inaccurate problem of Monitoring Data of existing monitoring device.
The invention provides the micro-water on-Line Monitor Device of a kind of high voltage electric equipment SF6 gas, this micro-water on-Line Monitor Device comprises: gas circulation mechanism and the micro-water gauge detected the gas in described gas circulation mechanism, wherein said gas circulation mechanism comprises cylinder, piston and the drive unit that piston can be made to move back and forth in cylinder, described piston is arranged at the inside of described cylinder and can moves back and forth inside described cylinder under the effect of described drive unit, described cylinder is provided with for sealing with sulfur hexafluoride air storage chamber in high voltage electric equipment the circulation ventilating mouth be communicated with.
Further, described gas circulation mechanism is arranged in a seal chamber.
Further, described gas circulation mechanism also comprises connecting pipe, and described circulation ventilating mouth is sealed with described sulfur hexafluoride air storage chamber by described connecting pipe and is communicated with, and described connecting pipe is provided with valve.
Further, described gas circulation mechanism also comprises housing, and described gas circulation mechanism and described micro-water gauge are all arranged in described housing.
Further, described piston is embedded with at least one O-ring seal.
Further, described drive unit is made up of adjuster bar, motor, speed reduction unit, one end of described adjuster bar is connected on described piston, the other end of described adjuster bar is connected on described speed reduction unit, described speed reduction unit is fixed on described motor, and described adjuster bar can drive described piston to move back and forth in described cylinder under the effect of described motor.
Further, described drive unit also comprises travel control switch, and described travel control switch is fixed on described adjuster bar.
Further, described drive unit is electromagnetic mechanism, and described electromagnetic mechanism is arranged at the inside of piston, and piston can be driven to move back and forth.
Further, described connecting pipe is provided with three-way connection, and described sulfur hexafluoride air storage chamber is communicated with the second port with first port of described cylinder by described three-way connection, and the 3rd port of described three-way connection is as gas supplementing opening.
Further, the micro-water on-Line Monitor Device of described high voltage electric equipment SF6 gas also comprises computer data processing system, described computer data processing system comprises switch, controller, environment temperature sensor, Based Intelligent Control element and pressure transducer, described environment temperature sensor, micro-water gauge, pressure transducer and described controller are connected with described Based Intelligent Control element, and described switch, controller, Based Intelligent Control element and pressure transducer are all arranged at the inside of described housing.
The SF of high voltage electric equipment provided by the invention
6the micro-water on-line monitoring method of gas, described method is applied to SF of the present invention
6the micro-water on-Line Monitor Device of gas, described method comprises step one: the disposal system of on-Line Monitor Device sends gas recursion instruction, and described drive unit drives described piston to move to the direction away from described circulation ventilating mouth, exits; Step 2: after venting completes, described drive unit drives described piston to move near the direction of described circulation ventilating mouth, carries out air inlet, exits after air inlet completes according to the method described in step one again, so carry out one or more circulation; Step 3: after the one or more circulation in step 2 terminates balance, use described micro-water gauge to carry out measuring micro-water number of the gas in described gas circulation mechanism, and this micro-water number is saved, as the SF in current high voltage electric equipment
6micro-water number of gas.
Further, when the gaseous tension in described cylinder is stablized, determine the gas stable circulation in described cylinder, use described micro-water gauge to detect micro-water number of the gas in described gas circulation mechanism.
The SF of high voltage electric equipment provided by the invention
6gas on-line monitoring system, this system comprises two or more high voltage electric equipments being provided with sulfur hexafluoride air storage chamber and a micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas, micro-water gauge that described high voltage electric equipment SF6 gas micro-water on-Line Monitor Device comprises gas circulation mechanism and detects the gas in described gas circulation mechanism, wherein said gas circulation mechanism comprises cylinder, piston and the drive unit that piston can be made to move back and forth in cylinder, described piston is arranged at the inside of described cylinder and can moves back and forth inside described cylinder under the effect of described drive unit, described cylinder is provided with for sealing with sulfur hexafluoride air storage chamber in high voltage electric equipment the circulation ventilating mouth be communicated with, described circulation ventilating mouth to be sealed with sulfur hexafluoride air storage chamber described in each by connecting pipe and is communicated with, described connecting pipe is provided with two or more operation valve and each described operation valve is corresponding with a described sulfur hexafluoride air storage chamber, each described operation valve is connected with multiple-pass joint by described connecting pipe, described multiple-pass joint is directly or indirectly connected on described cylinder.
Further, described gas circulation mechanism is arranged in a seal chamber.
Further, the SF of described high voltage electric equipment
6gas on-line monitoring system also comprises computer data processing system and housing, described computer data processing system comprises switch, controller, environment temperature sensor, Based Intelligent Control element and pressure transducer, described environment temperature sensor, described pressure transducer, micro-water gauge, controller are connected with described Based Intelligent Control element, and described switch, controller, Based Intelligent Control element and pressure transducer are all arranged at the inside of described housing.
Further, be provided with at least one O-ring seal between described cylinder and drive unit, described O-ring seal does not move along with drive unit motion, but maintains static.
Adopt the SF that the invention provides a kind of high voltage electric equipment
6gas controlling device, method and system, can by the gas circulation mechanism of sealing, the gas of sulfur hexafluoride air storage chamber inside in high voltage electric equipment is circulated to the gas-holder of high voltage electric equipment outside, make sulfur hexafluoride air storage chamber humidity (moisture) that is inner and external sampling point can reach balance fast, accurately measured by micro-water gauge again, do not need to discharge a large amount of SF6 gas in air, testing result is accurate, performance safety.Sulfur hexafluoride gas circulating device of the present invention to accomplish highly reliable sealing simultaneously, that is the sealing problem that gas circulation is got up is solved, the present invention simultaneously controls cost to greatest extent, save space, reduce cost widely, can carry out large-scale promotion, the contribution of great novelty is made in the intellectuality for electrical network.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings:
Fig. 1 is the structural representation of the micro-water on-Line Monitor Device of SF6 gas that the high-voltage electrical apparatus of the embodiment of the present invention one is established;
Fig. 2 is the SF of the high voltage electric equipment of the embodiment of the present invention one
6the circuit diagram of the computer data processing system of the micro-water on-Line Monitor Device of gas;
Fig. 3 is the SF of the high voltage electric equipment of the embodiment of the present invention two
6the structural representation of the micro-water on-Line Monitor Device of gas;
Fig. 4 is the SF of the high voltage electric equipment of the embodiment of the present invention three
6the structural representation of the micro-water on-Line Monitor Device of gas;
Fig. 5 is the SF of the high voltage electric equipment of the embodiment of the present invention four
6the structural representation of the micro-water on-Line Monitor Device of gas;
Fig. 6 is the SF of high voltage electric equipment of the present invention
6the schematic flow sheet of the micro-water on-line monitoring method of gas;
Fig. 7 is the SF of high voltage electric equipment of the present invention
6the structural representation of the micro-water on-line monitoring system of gas.
Embodiment:
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the structural representation of the micro-water on-Line Monitor Device of SF6 gas of the high voltage electric equipment of embodiments of the invention one, as shown in Figure 1, and the SF of the high voltage electric equipment that the embodiment of the present invention one provides
6the micro-water on-Line Monitor Device of gas comprises computer data processing system 3, gas circulation mechanism 1 and micro-water gauge 7 that the gas in described gas circulation mechanism 1 is detected, wherein said gas circulation mechanism 1 comprises cylinder 11, piston 13 and the drive unit that piston 13 can be made to move back and forth in cylinder 11, described piston 13 sealing is arranged at the inside of described cylinder 11 and can moves back and forth inside described cylinder 11 under the effect of described drive unit, described piston 13 is embedded with at least one O-ring seal 14, O-ring seal 14 can be used for improving the sealing property of described cylinder 11, described cylinder 11 is provided with for sealing with sulfur hexafluoride air storage chamber in high voltage electric equipment the circulation ventilating mouth 12 be communicated with, described gas circulation mechanism 1 is arranged in a seal chamber 40, like this sulfur hexafluoride gas circulating device to accomplish highly reliable sealing, that is the sealing problem that gas circulation is got up is solved.
As shown in Figure 2, be the SF of the high voltage electric equipment of embodiments of the invention one
6the circuit diagram of the computer data processing system of the micro-water on-Line Monitor Device of gas, as shown in FIG., described computer data processing system 3 comprises switch 32, controller 33, environment temperature sensor 35, Based Intelligent Control element 36 and pressure transducer 37, described environment temperature sensor 35 and described pressure transducer 37 are connected with described Based Intelligent Control element 36, described Based Intelligent Control element 36 is connected with described micro-water gauge 7, described Based Intelligent Control element 36 is connected with described controller 33, described monitoring device also comprises housing 5, described switch 32, controller 33, Based Intelligent Control element 36 and pressure transducer 37, described gas circulation mechanism 1 and described micro-water gauge 7 are all arranged in described housing 5, described environment temperature sensor is arranged at the outside of described housing 5, thus can outdoor temperature be measured, described gas circulation mechanism 1 also comprises connecting pipe 2, described circulation ventilating mouth 12 is sealed with described sulfur hexafluoride air storage chamber by described connecting pipe 2 and is communicated with, described connecting pipe 2 is provided with valve 6, one end of connecting pipe 2 is sealedly connected on the upper of high voltage electric equipment, the other end is connected on the gas outlet of valve 6, the air intake opening of valve 6 is connected on the circulation ventilating mouth 12 of cylinder 11, thus, high voltage electric equipment can connect together with described gas circulation mechanism 1 by described connecting pipe 2.Described micro-water gauge 7 is also arranged on described connecting pipe 2, and micro-water gauge 7 is arranged at described valve 6 side simultaneously.Described micro-water gauge 7, for micro-water gaging, in order to detect micro-water number of gas in sulfur hexafluoride gas circulating device, is provided with pressure transducer 37 above described micro-water gauge 7, and this pressure transducer 37 is used for measuring the gaseous tension in monitoring device.One end of described connecting pipe 2 is directly or indirectly sealedly connected on high voltage electric equipment, and the other end is directly or indirectly connected on the circulation ventilating mouth 12 of cylinder 11, connecting pipe 2 is provided with three-way connection 4, this three-way connection 4 has the first port 401, second port 402 and the 3rd port 403, described sulfur hexafluoride air storage chamber is connected with the second port 402 with first port 401 of described cylinder 11 by described three-way connection 4, and the 3rd port 403 of described three-way connection 4 uses as gas supplementing opening.Namely high voltage electric equipment sulfur hexafluoride air storage chamber is connected with cylinder 11 by three-way connection 4, connecting pipe 2.
In this embodiment, described drive unit is by adjuster bar 15, motor 17, speed reduction unit 18 forms, one end of described adjuster bar 15 is connected on described piston 13, the other end of described adjuster bar 15 is connected on described speed reduction unit 18, described adjuster bar 15 can drive described piston 13 to move back and forth in described cylinder 11 under the effect of described motor 17, described speed reduction unit 18 is fixed on described motor 17, this drive unit also comprises Stroke Control plate 16 and travel control switch 19, the trip control panel 16 and travel control switch 19 are used for the displacement size of control piston, described Stroke Control plate 16 is fixed on described adjuster bar 15, and the moving displacement of piston 13 can well be grasped, described adjuster bar 15 can drive for 17 times described piston 13 to move back and forth in cylinder 11 at described motor.
As shown in Figure 3, be the SF of the high voltage electric equipment of the embodiment of the present invention two
6the structural representation of the micro-water on-Line Monitor Device of gas, as shown in FIG., the difference of this embodiment and embodiment one is, described connecting pipe 2 directly connects described valve 6 and described 3rd port 403, micro-water gauge 7 is arranged on three-way connection 4, described micro-water gauge 7 can be made more near high voltage electric equipment by such design, so the convenient SF6 gas to high voltage electric equipment carries out micro-water on-line monitoring.
The SF of the embodiment of the present invention one and embodiment two
6gas micro-water on-Line Monitor Device principle of work is as follows: the disposal system of on-Line Monitor Device sends instruction, send pressure and regulate (gas circulation) instruction, during beginning, such as piston 13 " above ", and near the direction of described circulation ventilating mouth 12, so motor 17 startup drives speed reduction unit 18 that piston 13 is moved to " below ", and arrive below away from direction (being equivalent to " venting ") → piston 13 of described circulation ventilating mouth 12, by the effect of Stroke Control plate 16 and travel control switch 19, motor 17 stops starting reversion, above piston 13 is shifted onto after (being equivalent to " air inlet ") → piston 13 to " above ", so motor 17 just stops, then main story, (being equivalent to " venting ") → " air inlet " → " venting " below speed reduction unit 18 moves to piston 13, after so several circulations terminate balance, micro-water gauge 7 is used to start to measure micro-water and density immediately, obtaining micro-water number is H1, this micro-water number H1 is saved, as current micro-water number.After measurement terminates, piston 13 is adjusted to " air inlet " position, namely piston " above ".Before next gas circulation, system thinks that current micro-water number is H1 all the time.After some skies (can set arbitrarily), system sends instruction, then does the cyclic process that SF6 gas is cycled to repeat " venting ", " air inlet ".After such process, micro-water number H1 in this moment is replaced original micro-water H1, equally before the circulation of next gas, system thinks that current micro-water number is H1 all the time.Such rule is gone down.Monitoring device has simultaneously: motor 17 defencive function, prevents from burning out, and the prompt facility that governor motion has been broken.Motor can adopt general motor, implements the adjustment of piston in conjunction with speed reduction unit, and stepper motor and gear train also can be adopted to implement the adjustment of piston.When can certainly start, such as piston 13 " below ", and away from the direction of described circulation ventilating mouth 12, so motor 17 startup drives speed reduction unit 18 that piston 13 is moved to " above ", and arrive above near direction (being equivalent to " air inlet ") → piston 13 of described circulation ventilating mouth 12, by the effect of Stroke Control plate 16 and travel control switch 19, motor 17 stops starting to reverse, below piston 13 is shifted onto after (being equivalent to " venting ") → piston 13 to " above ", so motor 17 just stops, then main story, (being equivalent to " air inlet ") → " venting " → " air inlet " above speed reduction unit 18 moves to piston 13, after so several circulations terminate balance, micro-water gauge 7 is used to start to measure micro-water and density immediately, obtaining micro-water number is H1, this micro-water number H1 is saved, as current micro-water number.
Through above-mentioned several circulations, the sulfur hexafluoride gas in the intrinsic SF6 gas of high voltage electric equipment and cylinder 1 fully will circulate each other, exchange, then arrive equilibrium state.In equilibrium state, test micro-water number and density value, and this micro-water number is saved, as current micro-water number, namely can test the moisture of the intrinsic sulfur hexafluoride of high voltage electric equipment, true micro-water number can be recorded.Because the change of micro-water is a process slowly, the accidents such as severe leakage occur under extreme case can Timeliness coverage by density monitor, does not therefore need continuous working to measure, can be set time and the cycle of micro-water gaging by disposal system.The dew point signal combination container inner pressure value of micro-water sensor or transmitter output simultaneously and scene temperature value, gas in container water cut PPM value, the corresponding dew point of 20 degree can also be calculated, thus the present invention can to solve on-line measurement inaccurate and be difficult to reflect the problem of main gas tank's humidity (micro-water content).Pass through gas-circulating system, make the humidity of main gas tank and sampled point (moisture) balance can be reached fast, accurately measured by excellent micro-water sensor or transmitter again, sulfur hexafluoride gas circulating device of the present invention to accomplish highly reliable sealing simultaneously, that is solves sealing problem when gas circulation is got up.
As shown in Figure 4, be the SF of the high voltage electric equipment of the embodiment of the present invention three
6the structural representation of the micro-water on-Line Monitor Device of gas, in this embodiment, described drive unit is electromagnetic mechanism (electromagnet) 42, described electromagnetic mechanism 42 is arranged at the inside of piston 13, and piston 13 can be driven to move back and forth, electromagnetic mechanism (electromagnet) 42 can drive piston 13 to move around by control system instruction, so piston 13 can accomplish sealing property more reliably, say in theory and can not leak gas, and the serviceable life of piston 13 more can lengthen.The SF of the high voltage electric equipment of embodiment three
6the principle of work of gas micro-water on-Line Monitor Device and embodiment one and embodiment 2 similar, therefore here do not repeating.
As shown in Figure 5, be the SF of the high voltage electric equipment of the embodiment of the present invention four
6the structural representation of the micro-water on-Line Monitor Device of gas, in this embodiment, some O-ring seals 60 are set up between adjuster bar 15 and cylinder 1, be characterized in that O-ring seal 60 does not move along with adjuster bar 15 and moves, namely O-ring seal 60 is motionless in fixed position, such its sealing property of further raising.Further in addition, drive unit is made up of adjuster bar 15, motor 17, speed reduction unit 18, one end of described adjuster bar 15 is connected on described piston 13, the other end of described adjuster bar 15 is connected on the runner 181 (can be eccentric wheel) of described speed reduction unit 18 by universal joint and connecting rod, realize circular motion and be transformed into rectilinear motion, described adjuster bar 15 can drive described piston 13 to move back and forth in described cylinder 11 under the effect of described motor 17, speed reduction unit 18 and runner 181.The maximum feature of present case is between adjuster bar 15 and cylinder 1, set up some O-ring seals 60, and O-ring seal 60 does not move along with adjuster bar 15 and moves, and namely O-ring seal 60 is motionless in fixed position, such its sealing property of further raising.The method being transformed into rectilinear motion as circular motion can have multiple, here repeats no longer one by one.In addition, can be circular motion between adjuster bar 15 and cylinder 1, also can realize piston 13 and move back and forth in described cylinder 11, its method be various, is not here also repeating.
Fig. 6 is the SF of high voltage electric equipment of the present invention
6the schematic flow sheet of the micro-water on-line monitoring method of gas, as shown in FIG., described method is applied to the SF shown in embodiment one to embodiment four
6gas controlling device, described SF
6gas monitoring method comprises:
The disposal system of step S1, on-Line Monitor Device sends gas recursion instruction, and described drive unit drives described piston to move to the direction away from described circulation ventilating mouth, carries out air-breathing;
Step S2, after venting completes, described drive unit drives described piston to move near the direction of described circulation ventilating mouth, carries out air inlet, exits after air inlet completes according to the method described in step one again, so carry out one or more circulation;
Step S3, after venting completes, described drive unit drives described piston to move near the direction of described circulation ventilating mouth, carries out air inlet, exits after air inlet completes according to the method described in step one again, so carry out one or more circulation.
According to said method, when the gaseous tension in described cylinder 11 is stablized, determine the gas stable circulation in described cylinder 11, use described micro-water gauge 7 to detect gas in described gas circulation mechanism 1.
Fig. 7 is the SF of high voltage electric equipment of the present invention
6the structural representation of the micro-water on-line monitoring system of gas, as shown in Figure 7, the invention provides a kind of SF of high voltage electric equipment
6gas monitoring system comprises: some high voltage electric equipment and micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas being provided with sulfur hexafluoride air storage chamber, the micro-water on-Line Monitor Device of described high voltage electric equipment SF6 gas comprises computer data processing system 3, gas circulation mechanism 1 and micro-water gauge 7 that the gas in described gas circulation mechanism is detected, wherein said gas circulation mechanism 1 comprises cylinder 11, piston 13 and the drive unit that piston 13 can be made to move back and forth in cylinder 11, described cylinder 11 is provided with for sealing with sulfur hexafluoride air storage chamber in high voltage electric equipment the circulation ventilating mouth 12 be communicated with, described gas circulation mechanism 1 is arranged in a seal chamber 40, described computer data processing system 3 comprises switch 32, controller 33, environment temperature sensor 35, Based Intelligent Control element 36, pressure transducer 37, described circulation ventilating mouth 12 is sealed with sulfur hexafluoride air storage chamber described in each by connecting pipe 21 ~ 2N and is communicated with, described connecting pipe 2 is provided with some operation valve 101 ~ 10N, and each described operation valve 101 ~ 10N is corresponding with a described sulfur hexafluoride air storage chamber, some described operation valve 101 ~ 10N are connected with multiple-pass joint 41 ~ 4N by described connecting pipe 21 ~ 2N, described multiple-pass joint is directly or indirectly connected on described cylinder, described some operation valve 101 ~ 10N are sealed in some housing 121 ~ 12N, some operation valve 101 ~ 10N are connected with multiple-pass joint 301, multiple-pass joint 301 is directly or indirectly connected with micro-water gauge 7 again, described multiple-pass joint 301 is directly or indirectly connected on described cylinder 1.
The principle of work of the on-line monitoring system of the present embodiment is as follows, when measuring the micro-water of SF6 gas of high voltage electric equipment 1#SF6 gas air chamber, the disposal system of on-Line Monitor Device sends instruction, open solenoid valve 101 " venting " in sulfur hexafluoride cylinder 11, now all the other solenoid valves (102 ~ 10N) are cut out, after the pressure P measured is stable, the disposal system of on-Line Monitor Device sends instruction, send pressure and regulate (gas circulation) instruction, during beginning, such as piston 13 " above ", so motor 17 start drive driving mechanism piston 13 is moved to below (being equivalent to " venting ") → piston 13 arrive below, motor 17 stops starting reversion, above piston 13 is shifted onto after (being equivalent to " air inlet ") → piston 13 to " above ", so motor 17 just stops, then main story, (being equivalent to " venting ") → " air inlet " → " venting " below driving mechanism moves to piston 13, after so several circulations terminate balance, start the micro-water of SF6 gas and the density of measuring high voltage electric equipment 1#SF6 gas air chamber immediately.This micro-water number H1 is saved.As the micro-water number H1 of SF6 gas of current high voltage electric equipment 1#SF6 gas air chamber.After measurement terminates, piston 13 is adjusted to " air inlet " position, namely piston 13 " above ", simultaneously shut electromagnetic valve 101.Before next gas circulation, system thinks that the micro-water number of SF6 gas of current high voltage electric equipment 1#SF6 gas air chamber is H1 all the time.When wanting the micro-water of SF6 gas of testing high voltage electrical equipment N#SF6 gas air chamber, its method is with above-mentioned.
Through above-mentioned several circulations, the sulfur hexafluoride gas in the intrinsic SF6 gas of high voltage electric equipment and cylinder 1 fully will circulate each other, exchange, then arrive equilibrium state.In equilibrium state, test micro-water number and density value, and this micro-water number is saved, as current micro-water number, namely can test the moisture of the sulfur hexafluoride of high voltage electric equipment body interior, real inner micro-water number can be recorded.Because the change of micro-water is a process slowly, the accidents such as severe leakage occur under extreme case can Timeliness coverage by density monitor, does not therefore need continuous working to measure, can be set time and the cycle of micro-water gaging by disposal system.The simultaneously dew point signal combination container inner pressure value that exports of micro-water sensor or transmitter and scene temperature value, can also calculate gas in container water cut PPM value, the corresponding dew point of 20 degree.So the present invention can solve the problem that on-line measurement is forbidden and is difficult to reflect main gas tank's humidity (micro-water content).By gas-circulating system, make the humidity of main gas tank and sampled point (moisture) balance can be reached fast, more accurately measured by excellent micro-water sensor or transmitter.Sulfur hexafluoride gas circulating device of the present invention to accomplish highly reliable sealing simultaneously, that is sealing problem when gas circulation is got up is solved, this is also the maximum innovative point of the present invention, present case is controlled cost to greatest extent simultaneously, save space, reduce cost widely, can carry out large-scale promotion, the contribution of great novelty is made in the intellectuality for electrical network.Because current micro-water gauge 7 price is high, by such innovative design, control cost to greatest extent, save space, reduce cost widely, can carry out large-scale promotion, the contribution of great novelty is made in the intellectuality for electrical network.In order to more cost-saving and raise the efficiency, the micro-water on-Line Monitor Device of described high voltage electric equipment SF6 gas can be two or more.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (16)
1. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas, it is characterized in that, comprise: gas circulation mechanism and micro-water gauge that the gas in described gas circulation mechanism is detected, wherein said gas circulation mechanism comprises cylinder, piston and the drive unit that piston can be made to move back and forth in cylinder, described piston is arranged at the inside of described cylinder and can moves back and forth inside described cylinder under the effect of described drive unit, described cylinder is provided with for sealing with sulfur hexafluoride air storage chamber in high voltage electric equipment the circulation ventilating mouth be communicated with.
2. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 1, it is characterized in that, described gas circulation mechanism is arranged in a seal chamber.
3. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 1, it is characterized in that, described gas circulation mechanism also comprises connecting pipe, and described circulation ventilating mouth is sealed with described sulfur hexafluoride air storage chamber by described connecting pipe and is communicated with, and described connecting pipe is provided with valve.
4. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 3, is characterized in that, also comprise housing, and described gas circulation mechanism and described micro-water gauge are all arranged in described housing.
5. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 1, is characterized in that, described piston is embedded with at least one O-ring seal.
6. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 1, it is characterized in that, described drive unit is made up of adjuster bar, motor, speed reduction unit, one end of described adjuster bar is connected on described piston, the other end of described adjuster bar is connected on described speed reduction unit, described speed reduction unit is fixed on described motor, and described adjuster bar can drive described piston to move back and forth in described cylinder under the effect of described motor.
7. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 6, it is characterized in that, described drive unit also comprises travel control switch, and described travel control switch is fixed on described adjuster bar.
8. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 1, it is characterized in that, described drive unit is electromagnetic mechanism, and described electromagnetic mechanism is arranged at the inside of piston, and piston can be driven to move back and forth.
9. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 7 or 8, it is characterized in that, described connecting pipe is provided with three-way connection, described sulfur hexafluoride air storage chamber is communicated with the second port with first port of described cylinder by described three-way connection, and the 3rd port of described three-way connection is as gas supplementing opening.
10. the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas according to claim 1, it is characterized in that, also comprise computer data processing system, described computer data processing system comprises switch, controller, environment temperature sensor, Based Intelligent Control element and pressure transducer, described environment temperature sensor, micro-water gauge, pressure transducer and described controller are connected with described Based Intelligent Control element, and described switch, controller, Based Intelligent Control element and pressure transducer are all arranged at the inside of described housing.
The SF of 11. 1 kinds of high voltage electric equipments
6the micro-water on-line monitoring method of gas, it is characterized in that, described method is applied to the SF according to any one of claim 1-10
6the micro-water on-Line Monitor Device of gas, described method comprises:
Step one: the disposal system of on-Line Monitor Device sends gas recursion instruction, described drive unit drives described piston to move to the direction away from described circulation ventilating mouth, exits;
Step 2: after venting completes, described drive unit drives described piston to move near the direction of described circulation ventilating mouth, carries out air inlet, exits after air inlet completes according to the method described in step one again, so carry out one or more circulation;
Step 3: after the one or more circulation in step 2 terminates balance, use described micro-water gauge to carry out measuring micro-water number of the gas in described gas circulation mechanism, and this micro-water number is saved, as the SF in current high voltage electric equipment
6micro-water number of gas.
The SF of 12. high voltage electric equipments according to claim 11
6the micro-water on-line monitoring method of gas, is characterized in that, when the gaseous tension in described cylinder is stablized, determines the gas stable circulation in described cylinder, uses described micro-water gauge to detect micro-water number of the gas in described gas circulation mechanism.
The SF of 13. 1 kinds of high voltage electric equipments
6the micro-water on-line monitoring system of gas, it is characterized in that, comprise: two or more are provided with high voltage electric equipment and the micro-water on-Line Monitor Device of high voltage electric equipment SF6 gas of sulfur hexafluoride air storage chamber, micro-water gauge that described high voltage electric equipment SF6 gas micro-water on-Line Monitor Device comprises gas circulation mechanism and detects the gas in described gas circulation mechanism, wherein said gas circulation mechanism comprises cylinder, piston and the drive unit that piston can be made to move back and forth in cylinder, described piston is arranged at the inside of described cylinder and can moves back and forth inside described cylinder under the effect of described drive unit, described cylinder is provided with for sealing with sulfur hexafluoride air storage chamber in high voltage electric equipment the circulation ventilating mouth be communicated with, described circulation ventilating mouth to be sealed with sulfur hexafluoride air storage chamber described in each by connecting pipe and is communicated with, described connecting pipe is provided with two or more operation valve and each described operation valve is corresponding with a described sulfur hexafluoride air storage chamber, each described operation valve is connected with multiple-pass joint by described connecting pipe, described multiple-pass joint is directly or indirectly connected on described cylinder.
The SF of 14. high voltage electric equipments according to claim 13
6the micro-water on-line monitoring system of gas, is characterized in that, described gas circulation mechanism is arranged in a seal chamber.
The SF of 15. high voltage electric equipments according to claim 14
6the micro-water on-line monitoring system of gas, it is characterized in that, also comprise computer data processing system and housing, described computer data processing system comprises switch, controller, environment temperature sensor, Based Intelligent Control element and pressure transducer, described environment temperature sensor, described pressure transducer, micro-water gauge, controller are connected with described Based Intelligent Control element, and described switch, controller, Based Intelligent Control element and pressure transducer are all arranged at the inside of described housing.
The SF of 16. high voltage electric equipments according to claim 13
6the micro-water on-line monitoring system of gas, is characterized in that, be provided with at least one O-ring seal between described cylinder and drive unit, and described O-ring seal does not move along with drive unit motion, but maintains static.
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| CN201410562502.3A CN104297431A (en) | 2014-10-21 | 2014-10-21 | Online SF6 gas micro-water monitoring device, system and method of high-voltage electrical equipment |
| CN201510639741.9A CN105203711B (en) | 2014-10-21 | 2015-09-30 | A kind of high voltage electric equipment SF6The micro- water on-Line Monitor Device of gas, system and method |
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| CN201410562502.3A CN104297431A (en) | 2014-10-21 | 2014-10-21 | Online SF6 gas micro-water monitoring device, system and method of high-voltage electrical equipment |
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