CN108181202B - Novel SF for GIS 6 Density on-line monitoring device and system - Google Patents
Novel SF for GIS 6 Density on-line monitoring device and system Download PDFInfo
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- CN108181202B CN108181202B CN201810190443.XA CN201810190443A CN108181202B CN 108181202 B CN108181202 B CN 108181202B CN 201810190443 A CN201810190443 A CN 201810190443A CN 108181202 B CN108181202 B CN 108181202B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 25
- 238000012544 monitoring process Methods 0.000 claims description 14
- 230000000007 visual effect Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 5
- 229910018503 SF6 Inorganic materials 0.000 claims description 4
- 230000003449 preventive effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 48
- 238000005259 measurement Methods 0.000 description 8
- 230000000875 corresponding effect Effects 0.000 description 5
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- 230000002159 abnormal effect Effects 0.000 description 2
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- 150000001247 metal acetylides Chemical class 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 108700012359 toxins Proteins 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
Abstract
The invention discloses a novel SF for GIS 6 The utility model provides a density on-line monitoring device and system, relates to GIS equipment, including characteristic gas distinguishing pipeline and dynamic detection pipeline, supercharging device drive gas pipeline and the self-cleaning pipeline of system, GIS equipment links to each other with the solenoid valve V1 of characteristic gas distinguishing pipeline, the solenoid valve V3 other end is connected between solenoid valve V1, solenoid valve V2, supercharging device drive gas pipeline links to each other with supercharging device' S drive gas interface, the manual valve S1 one end of the self-cleaning pipeline of system is connected in SF 6 The other end of the miniature vacuum pump is communicated with the outside of the room between the filter and the electromagnetic valve V3. The device can detect SO in the air chamber 2 、H 2 S、HF、CO、CF 4 And C 3 F 8 The content of the characteristic gas can be used for rapidly diagnosing the early internal faults of the equipment and avoiding accidents. The system of the invention can be used for SF in the air chamber of GIS equipment 6 And the density, the pressure and the decomposition products are dynamically monitored and controlled, so that data is provided for fault trend prediction.
Description
Technical Field
The invention relates to the technical field of substation monitoring, in particular to a novel SF for GIS 6 An on-line density monitoring device and system.
Background
GIS is the very big core of quantity once high voltage equipment in the transformer substation, carries out effective on-line monitoring to it, provides data and holds GIS's running state and stability effect huge for accident prevention or trouble judgement.
At present, SF of GIS air chamber 6 The gas state monitoring is usually carried out by adopting a mechanical mode matched with a digital remote transmission density relay, so that the functions of on-site density, pressure and temperature signal display, alarm and locking contact signal output and data real-time remote transmission are realized. But during the detection process, due to fixed point sampling and SF 6 The gas measurement area has no gas flowing to form a static dead zone, so that the gas pressure or density in the GIS can not be accurately measured (the density data is converted from pressure and temperature values).
When GIS product has fault, SF of fault area 6 The gas and solid insulating material are thermally and electrically cracked to produce sulfides, fluorides and carbides (sulfides are mainly SO) 2 、H 2 S、SOF 2 、SF 4 And SO 2 F 2 Fluorine, fluorineThe compound mainly comprises HF, CF 4 And metal fluorides, carbides mainly consisting of CO and CO 2 And low molecular hydrocarbons). SO is removed from the decomposed product 2 、H 2 S, CO and CF 4 Besides low toxicity, other toxic substances are serious toxins, the content in the equipment is very small and very unstable, if the real-time dynamic detection cannot be implemented, the toxic substances can be quickly absorbed by the adsorbent arranged in the GIS, and the fault gas cannot be effectively acquired for further analysis. Wherein SOF 2 、SF 4 And then further hydrolyze to produce SO 2 (concentration is the sum of direct decomposition and hydrolysis) and HF. A number of fault instance analyses indicate H 2 S is a characteristic component of thermosetting epoxy resin cracking and CO, CF 4 、C 3 F 8 The gas can be used as characteristic gas for GIS equipment running state evaluation and electrified detection. Thus, the SO in the gas cell is detected 2 、H 2 S、HF、CO、CF 4 And C 3 F 8 The content of the characteristic gas can be used for rapidly diagnosing the early internal faults of the equipment and avoiding accidents.
Therefore, it is necessary to design a novel SF for GIS 6 Density on-line monitoring system for implementing SF inside air chamber 6 And the density, the pressure and the decomposition products are dynamically monitored and controlled, so that data is provided for fault trend prediction.
Disclosure of Invention
The technical problem to be solved by the invention is that the prior art can not rapidly diagnose the defect of early internal failure of equipment, and provides a novel SF for GIS 6 An on-line density monitoring device and system.
The invention is realized by the following technical scheme: novel SF for GIS 6 The on-line density monitoring device comprises an electromagnetic valve V1, an electromagnetic valve V2, a flow limiting device, a pressure gauge P1, a one-way valve, a supercharging device, a safety valve, an electromagnetic valve V4, a pressure display reducing valve, a precision filter, an air compressor, an air filter, an electromagnetic valve V3 and SF 6 Filter, characteristic gas early warning module and SF 6 The device comprises a density relay, a voltage and current stabilizing device, a pressure gauge P2, a manual valve S1, a vacuum gauge, an inflation electromagnetic valve V5 and a miniature vacuum pump;
the electromagnetic valve V1, the electromagnetic valve V2, the flow limiting device, the pressure gauge P1, the one-way valve, the supercharging device, the pressure gauge P2, the pressure stabilizing and flow stabilizing device and the SF 6 Density relay, characteristic gas early warning module and SF 6 The filter and the electromagnetic valve V3 are sequentially connected in series to form a characteristic gas distinguishing pipeline and a dynamic detection pipeline;
the air filter, the air compressor, the precision filter, the pressure display reducing valve with pressure, the electromagnetic valve V4 and the safety valve are sequentially connected in series and connected with a driving air interface of the supercharging device to form a supercharging device driving air pipeline;
the manual valve S1, the vacuum gauge, the inflation electromagnetic valve V5 and the micro vacuum pump are sequentially connected in series to form a self-cleaning pipeline of the system;
the GIS equipment is connected with the electromagnetic valve V1, the other end of the electromagnetic valve V3 is connected between the electromagnetic valve V1 and the electromagnetic valve V2, and one end of the manual valve S1 is connected with the SF 6 The other end of the miniature vacuum pump is communicated with the outside of the room between the filter and the electromagnetic valve V3.
As one of the preferable modes of the invention, the air compressor is an oil-free air compressor and is used for driving an air source by a supercharging device, the supercharging device is an oil-free supercharging mechanism, and the output air pressure is continuously regulated by the pressure of the driving air source and is driven by a pipeline.
As one preferable mode of the invention, the characteristic gas early-warning module comprises a measurement SF 6 Micro water, H of gas 2 S、SO 2 、HF、CO、CF 4 And C 3 F 8 Sensor of content, the SF 6 Density relay measurement SF 6 Pressure, temperature and density data of the gas.
As one of the preferable modes of the invention, the invention also comprises a solenoid valve Vn and a solenoid valve Vn+1, a plurality of GIS devices are provided, and each corresponding GIS device is respectively connected with the solenoid valves V3 and SF through the solenoid valves Vn and the solenoid valve Vn+1 6 Filter and solenoid valves V2 and V3.
As one preferable mode of the invention, the flow limiting device is a pressure reducing valve or a flow controller, and the pressure stabilizing and flow stabilizing device is a buffer tank body with flow control.
The invention also discloses a novel SF for GIS 6 The density on-line monitoring system comprises an upper computer, a PLC and an SF 6 Density relay, characteristic gas early warning module, SF 6 The density relay and the characteristic gas early warning module are connected with the PLC control, the upper computer is connected with the PLC through RS485 of the wireless transmission module, the upper computer is connected with the air compressor, the vacuum pump and each electromagnetic valve control, the upper computer collects pressure contact signals of the pressure gauge P1 and the pressure gauge P2, and the upper computer collects SF 6 Density signal of density relay.
As one of preferable modes of the present invention, the SF 6 GIS air chamber SF collected by density relay 6 Temperature, pressure, density data.
As one of the preferable modes of the invention, the characteristic gas early-warning module collects SF of the GIS gas chamber 6 Micro water, H of gas 2 S、SO 2 、HF、CO、CF 4 And C 3 F 8 Content data.
As one of the preferable modes of the invention, the invention also comprises an audible and visual alarm, wherein the upper computer and the SF 6 The density relay and the characteristic gas early warning module are provided with audible and visual alarms.
As one of the preferable modes of the invention, the upper computer is connected with the wireless transmission module in a GPRS wireless mode, the upper computer is provided with threshold parameters, and when the upper computer receives information fed back by the PLC and the failure trend prediction is established through analysis, the audible and visual alarm is started and the personnel on duty are informed to take preventive measures.
Compared with the prior art, the invention has the advantages that: the device can detect SO in the air chamber 2 、H 2 S、HF、CO、CF 4 And C 3 F 8 The content of the characteristic gas can be used for rapidly diagnosing the early internal faults of the equipment and avoiding accidents. The system of the invention can be used for SF in the air chamber of GIS equipment 6 And the density, the pressure and the decomposition products are dynamically monitored and controlled, so that data is provided for fault trend prediction.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
fig. 2 is a system block diagram of the present invention.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
As in fig. 1: novel SF for GIS 6 The on-line density monitoring device relates to GIS equipment and comprises an electromagnetic valve V1 (1), an electromagnetic valve V2 (2), a flow limiting device (3), a pressure gauge P1 (15), a one-way valve (4), a supercharging device (5), a safety valve (14), an electromagnetic valve V4 (13), a pressure display reducing valve (12), a precision filter (11), an air compressor (10), an air filter (9), an electromagnetic valve V3 (8) and SF (sulfur hexafluoride) 6 Filter (7), characteristic gas early warning module (6), SF 6 The device comprises a density relay (23), a pressure stabilizing and flow stabilizing device (24), a pressure gauge P2 (16), a manual valve S1 (17), a vacuum gauge (18), an inflation electromagnetic valve V5 (19) and a miniature vacuum pump (20);
the electromagnetic valve V1 (1), the electromagnetic valve V2 (2), the flow limiting device (3), the pressure gauge P1 (15), the one-way valve (4), the supercharging device (5), the pressure gauge P2 (16), the pressure and current stabilizing device (24) and the SF 6 Density relay (23), characteristic gas early warning module (6), SF 6 The filter (7) and the electromagnetic valve V3 (8) are sequentially connected in series to form a characteristic gas distinguishing pipeline and a dynamic detection pipeline;
the air filter (9), the air compressor (10), the precision filter (11), the pressure display reducing valve (12), the electromagnetic valve V4 (13) and the safety valve (14) are sequentially connected in series and connected with a driving air interface of the supercharging device to form a supercharging device driving air pipeline;
the manual valve S1 (17), the vacuum gauge (18), the inflation electromagnetic valve V5 (19) and the micro vacuum pump (20) are sequentially connected in series to form a system self-cleaning pipeline;
the GIS equipment is connected with the electromagnetic valve V1 (4), the other end of the electromagnetic valve V3 (8) is connected between the electromagnetic valve V1 (1) and the electromagnetic valve V2 (2), and one end of the manual valve S1 (17) is connected with the SF 6 Filter (7)) And the other end of the micro vacuum pump (20) is communicated with the outside of the room between the micro vacuum pump and the electromagnetic valve V3 (8). .
As one of the preferable modes of the invention, the air compressor (10) is an oil-free air compressor and is used for driving an air source by the pressurizing device (5), the pressurizing device (5) is an oil-free pressurizing mechanism, and the output air pressure is continuously regulated by the pressure of the driving air source and is driven by a pipeline.
As one preferable mode of the invention, the characteristic gas early warning module (6) contains a measurement SF 6 Micro water, H of gas 2 S、SO 2 、HF、CO、CF 4 And C 3 F 8 Sensor of content, the SF 6 Density relay (23) measures SF 6 Pressure, temperature and density data of the gas.
The invention also comprises a plurality of solenoid valves Vn (21) and a plurality of solenoid valves Vn+1 (22), wherein each corresponding GIS device is respectively connected with the solenoid valve V3 (8) and SF through the solenoid valve Vn (21) and the solenoid valve Vn+1 (22) 6 Between the filters (7) and between the solenoid valves V2 (2) and V3 (8).
As one preferable mode of the invention, the flow limiting device (3) is a pressure reducing valve or a flow controller, and the pressure stabilizing and flow stabilizing device (24) is a buffer tank body with flow control.
The following is a description of the functions and operation methods of the device:
the original states of the manual valve S1, the solenoid valves V1, V2, V3, V4, vn, vn+1, and the inflation solenoid valve V5 are all closed states.
Self-cleaning a pipeline: and connecting the 25GIS air chamber interfaces 1 and 26GIS air chamber interfaces n into corresponding GIS air chambers, opening the 1 electromagnetic valve V1, the 2 electromagnetic valve V2, the 8 electromagnetic valve V3, the 21 electromagnetic valve Vn, the 22 electromagnetic valve Vn+1, the 19 inflation electromagnetic valve V5 and the 20 vacuum pumps, and opening the 17 manual valve S1 to start vacuumizing and self-cleaning the system pipeline. When the vacuum is 133Pa, the 17 manual valve S1, the 19 inflation electromagnetic valve V5, the 20 vacuum pump, the 1 electromagnetic valve V1, the 2 electromagnetic valve V2, the 8 electromagnetic valve V3, the 21 electromagnetic valve Vn and the 22 electromagnetic valve Vn+1 are sequentially closed.
Density on-line monitoring
(1) GIS-1 air chamber dynamic monitoring:the system starts the 1 electromagnetic valve V1 and the 2 electromagnetic valve V2, starts the 10 air compressor, adjusts the 12 pressure reducing valve to be 0.6MPa, and the output pressure of the rear end of the 5 pressure increasing device is 1.2MPa (observed by the 16 pressure gauge 2), and then passes through the 24 pressure stabilizing and flow stabilizing device and the 23SF 6 Density relay, then 7SF 6 And filtering by a filter, then opening an 8 electromagnetic valve V3, and reversely filling high-pressure gas to a GIS-1 interface to form circulation disturbance to realize on-line dynamic data acquisition due to the blocking of the 3 current limiting device. The disturbance time should be stepwise, such as 2 h/time in summer and 1 h/time in winter. During the disturbance, through 23SF 6 The density relay was sampled 5 times for equal time and the average value of the pressure was taken as a measurement value. After 10min, the electromagnetic valve V2 is closed, and when the 15 pressure gauge 1 is 0MPa, the 10 air compressor is closed. Stabilizing for 5min, and passing through 23SF 6 And taking 3 samples at equal time of the density relay, taking the average value of the pressure as a measured value, and then sequentially closing the 8 electromagnetic valve V3 and the 1 electromagnetic valve V1.
(2) GIS-n air chamber dynamic monitoring: the system starts a 22 electromagnetic valve Vn+1 and a 2 electromagnetic valve V2, starts a 10 air compressor, adjusts a 12 pressure reducing valve to display 0.6MPa, and at the moment, the output pressure of the rear end of a 5 pressure increasing device is 1.2MPa (observed through a 16 pressure gauge 2), and then the output pressure is regulated by a 24 pressure stabilizing and flow stabilizing device and 23SF 6 Density relay, then 7SF 6 And filtering by a filter, then opening 21 the electromagnetic valve Vn, and reversely filling high-pressure gas to the GIS-n interface to form circulation disturbance to realize on-line dynamic data acquisition due to the blocking of the 3 current limiting device. The disturbance time should be stepwise, such as 2 h/time in summer and 1 h/time in winter. During the disturbance, through 23SF 6 The density relay was sampled 5 times for equal time and the average value of the pressure was taken as a measurement value. After 10min, the 22 electromagnetic valve Vn+1 is closed, and when the 15 pressure gauge 1 is 0MPa, the 10 air compressor is closed. Stabilizing for 5min, and passing through 23SF 6 The density relay was sampled 3 times for equal time and the average value of the pressure was taken as a measurement value, and then the 21 solenoid valve Vn was closed.
Characteristic gas discrimination
(1) GIS-1 air chamber monitoring: the system starts the 1 electromagnetic valve V1, 2 electromagnetic valve V2, starts the 10 air compressor, adjusts the 12 pressure reducing valve to display 0.6MPa, the output pressure of the rear end of the 5 pressure increasing device is 1.2MPa (observed by the 16 pressure gauge 2), and then the 24 pressure stabilizing and stabilizing device and the 6 characteristics are adoptedGas early warning module, 7SF 6 And filtering by a filter, then opening an 8 electromagnetic valve V3, and reversely filling high-pressure gas to a GIS-1 interface to form circulation disturbance to realize online dynamic characteristic gas data acquisition due to the blocking of the 3 current limiting device. The disturbance time should be staged, such as 4 h/time in summer and 2 h/time in winter. In the disturbance process, 3 samples are taken at equal time through a 6-feature gas early warning module, and the average value of the pressure is taken as a measured value. After 10min, the electromagnetic valve V2 is closed, and when the 15 pressure gauge 1 is 0MPa, the 10 air compressor is closed. And 5 times of sampling are carried out through the 6-characteristic gas early warning module for equal time after the stabilization is carried out for 5 minutes, the average value of the pressure is taken as a measured value, and then the 8 electromagnetic valve V3 and the 1 electromagnetic valve V1 are sequentially closed.
(2) GIS-n air chamber monitoring: the system starts 22 solenoid valve Vn+1, 2 solenoid valve V2, starts 10 air compressor, adjusts 12 relief pressure valve to show 0.6MPa, and 5 supercharging device rear end output pressure is 1.2MPa (observe through 16 manometer 2) this moment, and then through 24 steady voltage current stabilizer, 6 characteristic gas early warning module, and then through 7SF 6 And filtering by a filter, then opening 21 the electromagnetic valve Vn, and reversely filling high-pressure gas to the GIS-n interface to form circulation disturbance to realize online dynamic characteristic gas data acquisition due to the blocking of the 3 current limiting device. The disturbance time should be staged, such as 4 h/time in summer and 2 h/time in winter. In the disturbance process, 3 samples are taken at equal time through a 6-feature gas early warning module, and the average value of the pressure is taken as a measured value. After 10min, the 22 electromagnetic valve Vn+1 is closed, and when the 15 pressure gauge 1 is 0MPa, the 10 air compressor is closed. Stabilizing for 5min, and passing through 23SF 6 The density relay was sampled 5 times for equal time and the average value of the pressure was taken as a measurement value, and then the 21 solenoid valve Vn was closed.
As in fig. 2: the invention also discloses a novel SF for GIS 6 The density on-line monitoring system comprises an upper computer, a PLC and an SF 6 Density relay, characteristic gas early warning module, SF 6 The density relay and the characteristic gas early warning module are connected with the PLC control, the upper computer is connected with the PLC through RS485 of the wireless transmission module, the upper computer is connected with the air compressor, the vacuum pump and each electromagnetic valve control, the upper computer collects pressure contact signals of the pressure gauge P1 and the pressure gauge P2, and the upper computer collects SF 6 Density relayA density signal of the appliance.
As one of preferable modes of the present invention, the SF 6 GIS air chamber SF collected by density relay 6 Temperature, pressure, density data.
As one of the preferable modes of the invention, the characteristic gas early-warning module collects SF of the GIS gas chamber 6 Micro water, H of gas 2 S、SO 2 、HF、CO、CF 4 And C 3 F 8 Content data.
As one of the preferable modes of the invention, the invention also comprises an audible and visual alarm, wherein the upper computer and the SF 6 The density relay and the characteristic gas early warning module are provided with audible and visual alarms.
As one of the preferable modes of the invention, the upper computer is connected with the wireless transmission module in a GPRS wireless mode, the upper computer is provided with threshold parameters, and when the upper computer receives information fed back by the PLC and the failure trend prediction is established through analysis, the audible and visual alarm is started and the personnel on duty are informed to take preventive measures.
The following is a description of the system functional principles of the present invention:
the system adopts an upper computer and PLC control mode, and after the system is started, corresponding parameter setting is carried out on upper computer software, and an instruction is sent out to carry out data acquisition and corresponding actions are executed according to a program. After the fault trend prediction condition program is met, the system immediately gives an audible and visual alarm and informs an operator on duty to take preventive measures so as to avoid accidents.
And (3) controlling the input and output of the PLC switching value: output solenoid valves V1, V2, V3, V4, V5, vn, vn+1, a vacuum pump and an air compressor. P1 and P2 pressure and density signals are input.
SF 6 Density relay: the collected data are GIS air chambers SF respectively 6 Temperature, pressure and density, data are communicated with a wireless communication module RS485 through a PLC, then are remotely transmitted to an upper computer in a wireless mode to be subjected to real-time monitoring and storage and fault trend prediction, a threshold value is set in the module, and an audible and visual alarm set by abnormal output is immediately started, so that the fault position can be locked conveniently and rapidly.
Characteristic gas early warning module: the collected data are GIS gases respectivelyChamber SF 6 Micro water, H 2 S、SO 2 、HF、CO、CF 4 And C 3 F 8 The content, data are communicated with a wireless communication module RS485 through a PLC, then the data are remotely transmitted to an upper computer in a wireless way to monitor and store in real time and predict fault trend, a threshold value is set in the module, and an audible and visual alarm set by abnormal output is immediately started, so that the fault position can be locked conveniently and rapidly.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. Novel SF for GIS 6 The density on-line monitoring device relates to GIS equipment and is characterized by comprising an electromagnetic valve V1 (1), an electromagnetic valve V2 (2), a flow limiting device (3), a pressure gauge P1 (15), a one-way valve (4), a supercharging device (5), a safety valve (14), an electromagnetic valve V4 (13), a pressure display pressure reducing valve (12), a precision filter (11), an air compressor (10), an air filter (9), an electromagnetic valve V3 (8) and SF (sulfur hexafluoride) 6 Filter (7), characteristic gas early warning module (6), SF 6 The device comprises a density relay (23), a pressure stabilizing and flow stabilizing device (24), a pressure gauge P2 (16), a manual valve S1 (17), a vacuum gauge (18), an inflation electromagnetic valve V5 (19) and a miniature vacuum pump (20);
the electromagnetic valve V1 (1), the electromagnetic valve V2 (2), the flow limiting device (3), the pressure gauge P1 (15), the one-way valve (4), the supercharging device (5), the pressure gauge P2 (16), the pressure and current stabilizing device (24) and the SF 6 Density relay (23), characteristic gas early warning module (6), SF 6 The filter (7) and the electromagnetic valve V3 (8) are sequentially connected in series to form a characteristic gas distinguishing pipeline and a dynamic detection pipeline;
the air filter (9), the air compressor (10), the precision filter (11), the pressure display reducing valve (12), the electromagnetic valve V4 (13) and the safety valve (14) are sequentially connected in series and connected with a driving air interface of the supercharging device to form a supercharging device driving air pipeline;
the manual valve S1 (17), the vacuum gauge (18), the inflation electromagnetic valve V5 (19) and the micro vacuum pump (20) are sequentially connected in series to form a system self-cleaning pipeline;
the GIS equipment is connected with the electromagnetic valve V1 (1), the other end of the electromagnetic valve V3 (8) is connected between the electromagnetic valve V1 (1) and the electromagnetic valve V2 (2), and one end of the manual valve S1 (17) is connected with the SF 6 The other end of the micro vacuum pump (20) is communicated with the outside of the room between the filter (7) and the electromagnetic valve V3 (8);
SF for GIS using the novel system 6 The monitoring method of the density on-line monitoring device comprises the following steps:
step one: the GIS air chamber interface (25) is connected into a GIS air chamber, the electromagnetic valve V1 (1), the electromagnetic valve V2 (2), the electromagnetic valve V3 (8), the inflation electromagnetic valve V5 (19) and the vacuum pump (20) are opened, the manual valve S1 (17) is opened to start vacuumizing and self-cleaning on a system pipeline, and when the vacuum gauge (18) displays a certain pressure value, the manual valve S1 (17), the inflation electromagnetic valve V5 (19), the vacuum pump (20), the electromagnetic valve V1 (1), the electromagnetic valve V2 (2) and the electromagnetic valve V3 (8) are sequentially closed;
step two: the system opens the electromagnetic valve V1 (1) and the electromagnetic valve V2 (2), opens the air compressor (10), adjusts the pressure display reducing valve (12) with pressure, observes the pressure gauge P2 (16), and then passes through the voltage and current stabilizing device (24) and the SF 6 A density relay (23), a characteristic gas early warning module (6) and SF 6 The filter (7) filters, then the electromagnetic valve V3 (8) is opened, and high-pressure gas reversely fills to the GIS air chamber interface (25) to form circulation disturbance to realize on-line dynamic data acquisition due to the obstruction of the flow limiting device (3), and SF is adopted in the disturbance process 6 The density relay (23) takes multiple samples at equal time and takes the average value of the pressure as a measured value, and the characteristic gas early warning module (6) takes multiple samples at equal time and takes the average value of the pressure as the measured value, so that SF inside the GIS gas chamber is realized 6 Dynamic monitoring of density, pressure and decomposition products.
2. The SF for a novel GIS according to claim 1 6 The on-line density monitoring device is characterized in that the air compressor (10) is an oil-free air compressor and is used for driving an air source by the pressurizing device (5), the pressurizing device (5) is an oil-free pressurizing mechanism, and the output air pressure is continuously regulated by the pressure of the driving air source and is driven by a pipeline.
3. The SF for a novel GIS according to claim 1 6 The density on-line monitoring device is characterized in that the characteristic gas early warning module (6) comprises a SF measuring module 6 Micro water, H of gas 2 S、SO 2 、HF、CO、CF 4 And C 3 F 8 Sensor of content, the SF 6 Density relay (23) measures SF 6 Pressure, temperature and density data of the gas.
4. The SF for a novel GIS according to claim 1 6 The density on-line monitoring device is characterized by further comprising electromagnetic valves Vn (21) and electromagnetic valves Vn+1 (22), wherein the number of GIS devices is several, and each corresponding GIS device is respectively connected with the electromagnetic valve V3 (8) and SF (sulfur hexafluoride) through the electromagnetic valves Vn (21) and the electromagnetic valves Vn+1 (22) 6 Between the filters (7) and between the solenoid valves V2 (2) and V3 (8).
5. The SF for a novel GIS according to claim 1 6 The density on-line monitoring device is characterized in that the flow limiting device (3) is a pressure reducing valve or a flow controller, and the pressure stabilizing and flow stabilizing device (24) is a buffer tank body with flow control.
6. A novel SF for GIS according to any one of claims 1-5 6 The system of the density on-line monitoring device is characterized by comprising an upper computer, a PLC and an SF 6 Density relay, characteristic gas early warning module, SF 6 The density relay and the characteristic gas early warning module are connected with the PLC control, the upper computer is connected with the PLC through RS485 of the wireless transmission module, the upper computer is connected with the air compressor, the vacuum pump and each electromagnetic valve control, the upper computer collects pressure contact signals of the pressure gauge P1 and the pressure gauge P2, and the upper computer collects SF 6 Density signal of density relay.
7. The SF for a novel GIS according to claim 6 6 The system of the density on-line monitoring device is characterized in that the SF 6 Density relayCollecting GIS air chamber SF 6 Temperature, pressure, density data.
8. The SF for a novel GIS according to claim 6 6 The system of the density on-line monitoring device is characterized in that the characteristic gas early warning module collects SF of the GIS air chamber 6 Micro water, H of gas 2 S、SO 2 、HF、CO、CF 4 And C 3 F 8 Content data.
9. The SF for a novel GIS according to claim 6 6 The system of the density on-line monitoring device is characterized by further comprising an audible and visual alarm, wherein the upper computer and the SF (sulfur hexafluoride) are connected with each other through the system 6 The density relay and the characteristic gas early warning module are provided with audible and visual alarms.
10. The SF for a novel GIS according to claim 6 6 The system of the density on-line monitoring device is characterized in that the upper computer is connected with the wireless transmission module in a GPRS wireless mode, threshold parameters are set on the upper computer, and when the upper computer receives information fed back by the PLC, the system starts audible and visual alarm and informs operators on duty to take preventive measures when the analysis is that the fault trend prediction is established.
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| CN110411894B (en) * | 2019-09-04 | 2022-02-25 | 上海乐研电气有限公司 | Gas density monitoring system |
| CN112462217A (en) * | 2020-11-11 | 2021-03-09 | 上海电器科学研究所（集团）有限公司 | High-pressure gas tolerance test device and test method |
| CN112578245A (en) * | 2020-12-09 | 2021-03-30 | 广西电网有限责任公司电力科学研究院 | GIS disconnecting link air chamber fault diagnosis method and device based on optical technology |
| CN113933467B (en) * | 2021-10-26 | 2024-02-13 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride decomposition product air pressure monitoring device based on gas in-situ detection |
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