CN107834512A - A kind of electric power SF6 main transformer non-charges protection device and guard method - Google Patents
A kind of electric power SF6 main transformer non-charges protection device and guard method Download PDFInfo
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- CN107834512A CN107834512A CN201711307430.8A CN201711307430A CN107834512A CN 107834512 A CN107834512 A CN 107834512A CN 201711307430 A CN201711307430 A CN 201711307430A CN 107834512 A CN107834512 A CN 107834512A
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- main transformer
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- transformer device
- microprocessor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/045—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a thermal radiation sensor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Protection Of Transformers (AREA)
Abstract
The present invention relates to a kind of electric power SF6Main transformer non-charge protection device and guard method.Including SF6Main transformer device body, primary cut-out, thermal imaging temperature-sensitive unit, microprocessor, D/A converter, a/d converter, image display, the SF6Main transformer device body includes main transformer winding, iron core and SF6The SF of filling in main transformer device body6Gas；The primary cut-out is installed on SF6The sub-high pressure incoming call side of main transformer device body, including moving contact, static contact and circuit breaker trip wire loop, primary cut-out are contacted and departed from by the insertion of moving contact, static contact and separated, and realization is switched on or switched off SF6The primary power source of main transformer device body；The thermal imaging temperature-sensitive unit includes being installed on SF6The external sensor of main transformer device sheet, stretch into SF6Main transformer device body is interior and is arranged on SF6Some infrared thermal imaging temperature-sensing probes, optical fiber in main transformer device inner body wall.The present invention had both protected the safety of staff and main transformer, protected the safe operation of bulk power grid again.
Description
Technical field
The present invention relates to a kind of electric power SF6Main transformer non-charge protection device and guard method.
Background technology
Traditional main transformer in operation, carries out electrical measurement and protection, by setting in advance by the change of electricity, the quantity of magnetism mostly
Electricity, magnetic protection seting value program are put, when being broken down in main transformer operation, its electricity, the quantity of magnetism can change, when change reaches
During the setting valve pre-set, these electric quantity protectives play main transformer protection effect, prevent fault spread, and protection staff equipment
Safety, the transformer oil that traditional main transformer is yet filled using temperature probe to main transformer inside, or SF6Gas measures, to estimate
Calculation main transformer winding true temperature, and a kind of non electrical quantity auxiliary protection mode carried out.It is exactly above existing main transformer electricity and non-electrical
The protected mode of amount, its existing deficiency and shortcoming are as follows：
Traditional electric quantity protective mode：Either the change of these electricity such as electric current, voltage, impedance, capacitive reactance, induction reactance is in normal operation
Or electric quantity change scope in misoperation be present, but for some such as loose contacts, joint looseness or oxidation these draw
The defects of playing heating, is to need power failure to get off, could be found by measuring contact resistance etc., this is to survey in charging operation
Amount, traditional electric quantity protective mode is often difficult to find above heating defect to the main transformer in charging operation.
Traditional non-ionizing energy loss mode：Because carrying high-tension electricity in main transformer operation, traditional main transformer temperature probe can not be direct
Touch main transformer winding to measure, the transformer oil that temperature probe can only be used to fill main transformer inside, or SF6Gas is carried out
Measurement, to estimate main transformer winding true temperature, there is serious hysteresis and inaccuracy in this.
The content of the invention
It is an object of the invention to provide a kind of electric power SF6Main transformer non-charge protection device and guard method, were both protected
Staff and the safety of main transformer, protect the safe operation of bulk power grid again.
To achieve the above object, the technical scheme is that：A kind of electric power SF6Main transformer non-charge protection device, including
SF6Main transformer device body, primary cut-out, thermal imaging temperature-sensitive unit, microprocessor, D/A converter, a/d converter, image are shown
Device, the SF6Main transformer device body includes main transformer winding, iron core and SF6The SF of filling in main transformer device body6Gas；The high pressure
Breaker is installed on SF6The sub-high pressure incoming call side of main transformer device body, including moving contact, static contact and circuit breaker trip coil return
Road, primary cut-out are contacted and departed from by the insertion of moving contact, static contact and separated, and realization is switched on or switched off SF6Main transformer device sheet
The primary power source of body；The thermal imaging temperature-sensitive unit includes being installed on SF6The external sensor of main transformer device sheet, stretch into SF6Main transformer device
Body is interior and is arranged on SF6Some infrared thermal imaging temperature-sensing probes, optical fiber in main transformer device inner body wall；Infrared thermal imaging temperature-sensitive
Probe can carry out non-contacting thermal imaging thermometric to main transformer winding, and temperature measurement signal is transmitted through the fiber into sensor and installation
Image display in the control room of a distant place, sensor are transmitted to a/d converter, AD conversion after thermal imaging temperature signal is amplified
Device will be transmitted after the thermal imaging thermometric electric signal come is converted to data signal, be resent to microprocessor, and microprocessor is by numeral
Transmitted after signal transacting to D/A converter, D/A converter can by by microprocessor transmission Lai data signal be converted to and breaker
The electric signal that trip(ping) circuit matches, and circuit breaker trip wire loop is conveyed to, perform the instruction that microprocessor is sent；Image
Display can observe SF at any time6Main transformer inner heat thermal imaging situation, in order to which operations staff observes at any time.
In an embodiment of the present invention, the microprocessor can be according to SF6The main transformer winding of main transformer device body is being endangered
And safe operation serious heating defect when, automatically control SF6Main transformer device body incoming call side circuit breaker trip coil motion, cut-out
Incoming call power supply, avoids SF6Main transformer device body further damages, or even burns the danger of blast, also prevent power grid accident expansion
Major accident；Microprocessor is previously provided with trip temperature protection seting value, and microprocessor is also preset with according to infrared-ray
Penetrating SF6Gas and the program that different reflectivity and decay are modified between air is penetrated, and different main transformers are run
To the correction-compensation program of trip temperature at a temperature of load, varying environment, to reach to SF6The main transformer winding of main transformer device body
Accurate temperature-sensitive, it is ensured that precision maneuver, both avoided the degree of heat not up to jeopardize SF6Mistrip during main transformer device body is moved
Make, more prevented jeopardizing SF6During the serious heating defect of main transformer device body and electric power netting safe running, it is impossible to rapid control
The safety of the serious accident of circuit breaker trip, strong guarantee staff and grid equipment.
Present invention also offers one kind to be based on electric power SF described above6The guard method of main transformer non-charge protection device, bag
Include following steps,
1）SF6Due to electric current and magnetic fields in live line work, winding can generate heat main transformer device body inside it, need to be by it
The SF of portion's filling6Gas cools down, to ensure safe for operation；
2）According to SF6Main transformer device body running situation, programming trip temperature protection seting value is set in microprocessor in advance, it is micro-
Processor should also penetrate SF according to infrared ray6Gas medium and penetrate different reflectivity and decay between air dielectric and repaiied
Positive program, and to different SF6The correction-compensation of trip temperature is programmed at a temperature of main transformer operating load, varying environment
Program；
3）In SF6Before main transformer device body puts into operation, the electric power SF is first opened6Main transformer non-charge protection device；
4）Infrared thermal imaging temperature-sensing probe is to SF6The effective range of main transformer winding carries out that on-line continuous is infrared sweeps in main transformer device body
Retouch temperature-sensitive；
5）SF6Main transformer device body normal operation, its winding temperature value are micro- not less than the trip temperature protection seting value pre-set
Processor does not send instruction；
6）Work as SF6Serious heating defect occurs for main transformer winding in main transformer device body, and its temperature reaches the trip temperature pre-set
During protection seting value, microprocessor sends trip command signal, controls circuit breaker trip coil motion, its moving contact is taken off rapidly
From static contact, SF is cut off6Main transformer device body incoming call side power supply, by the SF of this serious heating accident6Main transformer device body by force with power network
Keep apart, the safety of staff and main transformer can either be protected, and can enough protects the safe operation of bulk power grid.
Compared to prior art, the invention has the advantages that：The present invention is to be based on SF6No matter is winding inside main transformer
It is which kind of failure occurs, the principle for being higher than warming temperature under normal operational condition can all occurs on its trouble point, pass through non-electrical
The non-contacting infrared temperature-sensitive of amount, accurate SF6 main transformers winding failure point temperature variations can be captured in time online, due to infrared sense
Temperature probe keeps non-contacting safe distance with the winding with high-tension electricity, core portion in main transformer, and because infrared-ray exists
SF6There is the decay of good penetrance and very little in gas medium, therefore launched by infrared temperature-sensing probe and receive infrared sense
Warm signal, it can just complete continuous accurately temperature-sensitive work, while the application is previously provided with trip temperature protection seting value, design
Microprocessor be also programmed with penetrating SF according to infrared-ray6Gas and penetrate different reflectivity and decay between air and carry out
The program of amendment, and at a temperature of different main transformer operating loads, varying environment to correction-compensation program of trip temperature etc., when
SF6When main transformer inner heat temperature exceedes trip protection setting valve, microprocessor sends instruction, automatically controls SF6Main transformer incoming call side
The peace of high-voltage circuit breaker lock coil motion, circuit breaker trip, cut-out incoming call side power supply, the powerful guarantee power network person and equipment
Entirely.
Brief description of the drawings
Fig. 1 is the electric power SF of the embodiment of the present invention6The non-electricity protecting device normal operation work of heating in winding inside main transformer
Make schematic diagram.
Fig. 2 is the electric power SF of the embodiment of the present invention6When serious heating accident occurs for winding inside main transformer, non-ionizing energy loss dress
Accurate cut-out incoming call side breaker power supply is put, carries out protection fundamental diagram.
Fig. 3 is the SF of the embodiment of the present invention6Main transformer inner heat Faulty Temperature is not up to protection seting value, and microprocessor is not
Execute instruction, DJ1 are not closed, breaking coil circuit wiring diagram when breaking coil is failure to actuate.
Fig. 4 is the SF of the embodiment of the present invention6Serious heating accident occurs inside main transformer, temperature exceedes protection seting value, micro-
Processor sends execute instruction, DJ1 closures, breaking coil circuit wiring diagram during breaking coil trip operation.
Fig. 5 is the electric power SF of the embodiment of the present invention6Main transformer non-charge protection device second protection circuit theory block diagram.
In figure：1- infrared thermal imaging temperature-sensing probes；2- optical fiber；3-AD converters；4- image displays；5- microprocessors；
6-DA converters；7-SF6Main transformer device body；8- sleeve of main transformer；9- main transformer windings；10- high pressure inlet wires；11- high-voltage terminals；12-
Main transformer incoming call side breaker；13- circuit breaker static contacts；14- moving contact of breaker；15- bushing leads；16- breakers are jumped
Brake cable circle；17-SF6Gas.
Embodiment
1-5 below in conjunction with the accompanying drawings, technical scheme is specifically described.
A kind of electric power SF of the present invention6Main transformer non-charge protection device, including SF6Main transformer device body, primary cut-out, heat
It is imaged temperature-sensitive unit, microprocessor, D/A converter, a/d converter, image display, the SF6Main transformer device body includes main transformer
Winding, iron core and SF6The SF of filling in main transformer device body6Gas；The primary cut-out is installed on SF6Main transformer device body
One sub-high pressure is sent a telegram here side, including moving contact, static contact and circuit breaker trip wire loop, and primary cut-out passes through moving contact, quiet
The insertion contact and disengaging of contact separate, and realization is switched on or switched off SF6The primary power source of main transformer device body；The thermal imaging temperature-sensitive
Unit includes being installed on SF6The external sensor of main transformer device sheet, stretch into SF6Main transformer device body is interior and is arranged on SF6Main transformer device body
Some infrared thermal imaging temperature-sensing probes, optical fiber on inwall；Infrared thermal imaging temperature-sensing probe can carry out non-contact to main transformer winding
Thermal imaging thermometric, and temperature measurement signal is transmitted through the fiber to sensor and the image that is installed in the control room of a distant place is shown
Device, sensor, which is transmitted after thermal imaging temperature signal is amplified to a/d converter, a/d converter, to transmit the thermal imaging thermometric electricity come
After signal is converted to data signal, microprocessor is resent to, microprocessor will transmit to D/A converter after Digital Signal Processing,
D/A converter can by by microprocessor transmission Lai data signal be converted to the electric signal to match with circuit breaker trip loop, and
Circuit breaker trip wire loop is conveyed to, performs the instruction that microprocessor is sent；Image display can observe SF at any time6In main transformer
Portion's heating thermal imaging situation, in order to which operations staff observes at any time.The microprocessor can be according to SF6The main transformer of main transformer device body
Winding automatically controls SF when jeopardizing the serious heating defect of safe operation6Main transformer device body incoming call side circuit breaker trip
Coil motion, cut-out incoming call power supply, avoids SF6Main transformer device body further damages, or even burns the danger of blast, also prevent
The major accident that power grid accident expands；Microprocessor is previously provided with trip temperature protection seting value, and microprocessor is also preset with
SF is being penetrated according to infrared-ray6Gas and the program that different reflectivity and decay are modified between air is penetrated, and it is right
To the correction-compensation program of trip temperature at a temperature of different main transformer operating loads, varying environment, to reach to SF6Main transformer device sheet
The accurate temperature-sensitive of the main transformer winding of body, it is ensured that precision maneuver, both avoided the degree of heat and not up to jeopardized SF6During main transformer device body
Mistrip action, more prevented jeopardizing SF6During the serious heating defect of main transformer device body and electric power netting safe running, no
The safety of the serious accident of circuit breaker trip, strong guarantee staff and grid equipment can be controlled rapidly.
Present invention also offers one kind to be based on electric power SF described above6The guard method of main transformer non-charge protection device, bag
Include following steps,
1）SF6Due to electric current and magnetic fields in live line work, winding can generate heat main transformer device body inside it, need to be by it
The SF of portion's filling6Gas cools down, to ensure safe for operation；
2）According to SF6Main transformer device body running situation, programming trip temperature protection seting value is set in microprocessor in advance, it is micro-
Processor should also penetrate SF according to infrared ray6Gas medium and penetrate different reflectivity and decay between air dielectric and repaiied
Positive program, and to different SF6The correction-compensation of trip temperature is programmed at a temperature of main transformer operating load, varying environment
Program；
4）In SF6Before main transformer device body puts into operation, the electric power SF is first opened6Main transformer non-charge protection device；
4）Infrared thermal imaging temperature-sensing probe is to SF6The effective range of main transformer winding carries out that on-line continuous is infrared sweeps in main transformer device body
Retouch temperature-sensitive；
5）SF6Main transformer device body normal operation, its winding temperature value are micro- not less than the trip temperature protection seting value pre-set
Processor does not send instruction；
6）Work as SF6Serious heating defect occurs for main transformer winding in main transformer device body, and its temperature reaches the trip temperature pre-set
During protection seting value, microprocessor sends trip command signal, controls circuit breaker trip coil motion, its moving contact is taken off rapidly
From static contact, SF is cut off6Main transformer device body incoming call side power supply, by the SF of this serious heating accident6Main transformer device body by force with power network
Keep apart, the safety of staff and main transformer can either be protected, and can enough protects the safe operation of bulk power grid.
It is below the specific embodiment of the present invention.
Electric power SF6Main transformer non-charge protection device, including：SF6Main transformer device body, primary cut-out, SF6Filled in main transformer device body
The SF of note6Gas, SF6Winding and iron core in main transformer device body, in addition to thermal imaging temperature-sensitive system, microprocessor, and be installed on remote
The Real-time image display device on square control room backstage etc..SF6Because electric current and magnetic fields can generate heat, electric current is got over for winding in main transformer
Greatly, magnetic flux is stronger, heating it is more serious, when occur overload, overvoltage, or internal part contact it is bad when, can all produce different
Normal heating defect, when serious overheating defect occurs, such as can not rapid cut-off breaker, cut off the electricity supply, will seriously damage SF6It is main
Become, or even cause the danger burnt, exploded, SF6The SF of filling in main transformer device body6Gas plays insulation and cooling effect.Due to master
Becoming internal and high voltage be present, the temperature probe typically directly contacted is difficult to directly directly contact carry out thermometric with winding and iron core,
Traditional main transformer winding, iron core thermometric can only be by indirect thermometrics, as measured the oil temperature filled in main transformer device body and SF6Gas temperature
To estimate winding temperature, all there is serious hysteresis and inaccuracy in these, and infrared thermal imaging temperature-sensing probe in main transformer with carrying
Winding, the core portion of high-tension electricity keep certain safe distance, by non-contacting infrared thermal imaging temperature-sensitive, can just complete
The accurate thermal imaging thermometric of line, and because infrared ray can be in SF6There is the decay of good penetrance and very little in gas medium, but
Then not all right to oil-filled main transformer, infrared ray penetrance in the liquid medium of oil-filled main transformer internal transformer oil is poor, and decay is big, therefore
The application uses the non-ionizing energy loss mode of infrared temperature-sensitive, may be only available for filling SF6The main transformer of gas medium, and it is inapplicable oil-filled
The main transformer of medium.
Primary cut-out, primary cut-out are arranged on SF6The sub-high pressure incoming call side of main transformer, including moving contact, static contact
And breaking coil, primary cut-out are contacted and departed from by the insertion of dynamic and static contact and separated, realization is switched on or switched off SF6Main transformer
Primary power source, primary cut-out in addition to it can be cut-off by normal operating procedure, occur seriously jeopardize SF6The heating of main transformer
During failure, by microprocessor control breaking coil action, the dynamic and static contact for making originally to close a floodgate, which departs from rapidly, to be separated, and breaker is jumped
Lock, cut off the electricity supply, the SF of serious heating defect will occur6Main transformer is isolated from beyond powered power network, it is therefore prevented that accident it is further
Expand.
Thermal imaging temperature-sensitive system, thermal imaging temperature-sensitive system include being arranged on SF6Sensor outside main transformer device body, stretch into master
Change device body inside and some Minitype infrared thermal imaging temperature-sensing probes on main transformer device body inwall, and transmission signal
Optical fiber, AD signal adapters, DA signal adapters and Real-time image display device etc..Minitype infrared thermal imaging temperature-sensing probe can be right
SF6Winding inside main transformer carries out non-contacting accurate thermal imaging thermometric, and temperature measurement on-line signal is transmitted through the fiber into peace
Loaded on the sensor outside main transformer device body and the Real-time image display device that is installed in the control room of a distant place, sensor is by thermal imaging temperature
Transmitted after signal amplification to AD signal adapters, AD signal adapters are converted to numeral by next thermal imaging thermometric electric signal is transmitted
After signal, microprocessor is resent to, microprocessor believes the digital data transmission after programmed process to DA signal adapters, DA
Number converter can by by microprocessor transmission Lai data signal be converted to the electric signal to match with circuit breaker trip loop, and
Circuit breaker trip wire loop is conveyed to, performs the instruction that microprocessor is sent.The realtime graphic being installed in the control room of a distant place
Display can observe SF6 main transformer inner heat thermal imaging situations at any time, in order to which operations staff observes at any time.Minitype infrared temperature-sensitive
The output end of probe is electrically connected at the input of sensor and the input of Real-time image display device, the output end electricity of sensor
Property is connected to the input of a/d converter, and the output end of a/d converter is electrically connected at the input of microprocessor, microprocessor
Output end be electrically connected at the input of D/A converter, the output end of D/A converter is electrically connected at primary cut-out and tripped back
Road.
Microprocessor, microprocessor can according to SF6 main transformers winding when jeopardizing the serious heating defect of safe operation,
SF6 main transformers incoming call side circuit breaker trip coil motion is automatically controlled, cut-out incoming call power supply, avoids SF6 main transformers from further damaging, very
To the danger for burning blast, the major accident of power grid accident expansion also prevent.Microprocessor is previously provided with trip temperature guarantor
Setting valve is protected, microprocessor is also programmed with penetrating SF according to infrared-ray6Gas and penetrate between air different reflectivity and
Decay the program that is modified, and at a temperature of different main transformer operating loads, varying environment to the correction-compensation of trip temperature
Program etc., to reach to SF6The accurate temperature-sensitive of main transformer winding, it is ensured that precision maneuver, both avoided the degree of heat and not up to endangered
And mistrip action during SF6 main transformers, more prevent jeopardizing the serious heating defect of SF6 main transformers and electric power netting safe running
When, it is impossible to the safety of the serious accident of rapid control circuit breaker trip, strong guarantee staff and grid equipment.
The control method of said apparatus is as follows：
1）SF6Due to electric current and magnetic fields in live line work, winding 9 can generate heat main transformer 7 inside it, need to be by being filled inside it
The SF of note6Gas 17 cools down, to ensure safe for operation；
2）According to SF6The running situation of main transformer 7, programming trip temperature protection seting value, microprocessor are set in microprocessor 5 in advance
Device should also penetrate SF according to infrared ray6The medium of gas 17 and penetrate different reflectivity and decay between air dielectric and be modified
Program, and to different SF6The correction-compensation of trip temperature is programmed at a temperature of the operating load of main transformer 7, varying environment
Program etc.；
3）In SF6Before main transformer 17 puts into operation, first turns on power SF6Main transformer non-charge protection device；
4）Minitype infrared thermal imaging temperature-sensing probe 1 is to SF6The effective range of the inside winding 9 of main transformer 7 carries out that on-line continuous is infrared to sweep
Retouch temperature-sensitive；
5）SF6The normal operation of main transformer 7, its temperature value of winding 9 is not less than the trip temperature protection seting value pre-set, microprocessor
Device 5 does not send instruction；
6）Work as SF6Serious heating defect occurs for the inside winding 9 of main transformer 7, and it is whole that its temperature reaches the trip temperature protection pre-set
During definite value, microprocessor 5 sends trip command signal, and the control breaking coil 16 of breaker 12 acts, and makes its moving contact 14 rapid
Depart from static contact 13, cut off SF6The incoming call side power supply of main transformer 7, by the SF of this serious heating accident6Main transformer 7 is isolated with power network by force
Open, both protected the safety of staff and main transformer, protect the safe operation of bulk power grid again.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, caused function are made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (3)
- A kind of 1. electric power SF6Main transformer non-charge protection device, it is characterised in that：Including SF6Main transformer device body, primary cut-out, heat It is imaged temperature-sensitive unit, microprocessor, D/A converter, a/d converter, image display, the SF6Main transformer device body includes main transformer Winding, iron core and SF6The SF of filling in main transformer device body6Gas；The primary cut-out is installed on SF6Main transformer device body One sub-high pressure is sent a telegram here side, including moving contact, static contact and circuit breaker trip wire loop, and primary cut-out passes through moving contact, quiet The insertion contact and disengaging of contact separate, and realization is switched on or switched off SF6The primary power source of main transformer device body；The thermal imaging temperature-sensitive Unit includes being installed on SF6The external sensor of main transformer device sheet, stretch into SF6Main transformer device body is interior and is arranged on SF6Main transformer device body Some infrared thermal imaging temperature-sensing probes, optical fiber on inwall；Infrared thermal imaging temperature-sensing probe can carry out non-contact to main transformer winding Thermal imaging thermometric, and temperature measurement signal is transmitted through the fiber to sensor and the image that is installed in the control room of a distant place is shown Device, sensor, which is transmitted after thermal imaging temperature signal is amplified to a/d converter, a/d converter, to transmit the thermal imaging thermometric electricity come After signal is converted to data signal, microprocessor is resent to, microprocessor will transmit to D/A converter after Digital Signal Processing, D/A converter can by by microprocessor transmission Lai data signal be converted to the electric signal to match with circuit breaker trip loop, and Circuit breaker trip wire loop is conveyed to, performs the instruction that microprocessor is sent；Image display can observe SF at any time6In main transformer Portion's heating thermal imaging situation, in order to which operations staff observes at any time.
- A kind of 2. electric power SF according to claim 16Main transformer non-charge protection device, it is characterised in that：The microprocessor Can be according to SF6The main transformer winding of main transformer device body automatically controls SF when jeopardizing the serious heating defect of safe operation6It is main Become device body incoming call side circuit breaker trip coil motion, cut-out incoming call power supply, avoid SF6Main transformer device body further damages, very To the danger for burning blast, the major accident of power grid accident expansion also prevent；Microprocessor is previously provided with trip temperature guarantor Setting valve is protected, microprocessor is also preset with is penetrating SF according to infrared-ray6Gas and penetrate between air different reflectivity and Decay the program that is modified, and at a temperature of different main transformer operating loads, varying environment to the correction-compensation of trip temperature Program, to reach to SF6The accurate temperature-sensitive of the main transformer winding of main transformer device body, it is ensured that precision maneuver, both avoided heating journey Degree not up to jeopardizes SF6Mistrip action during main transformer device body, has more prevented jeopardizing SF6Main transformer device body and power network During the serious heating defect of safe operation, it is impossible to the serious accident of rapid control circuit breaker trip, strong guarantee staff and The safety of grid equipment.
- 3. one kind is based on the electric power SF of claim 1 or 26The guard method of main transformer non-charge protection device, it is characterised in that： Comprise the following steps,1）SF6Due to electric current and magnetic fields in live line work, winding can generate heat main transformer device body inside it, need to be by it The SF of portion's filling6Gas cools down, to ensure safe for operation；2）According to SF6Main transformer device body running situation, programming trip temperature protection seting value is set in microprocessor in advance, it is micro- Processor should also penetrate SF according to infrared ray6Gas medium and penetrate different reflectivity and decay between air dielectric and repaiied Positive program, and to different SF6The correction-compensation of trip temperature is programmed at a temperature of main transformer operating load, varying environment Program；In SF6Before main transformer device body puts into operation, the electric power SF is first opened6Main transformer non-charge protection device；4）Infrared thermal imaging temperature-sensing probe is to SF6The effective range of main transformer winding carries out that on-line continuous is infrared sweeps in main transformer device body Retouch temperature-sensitive；5）SF6Main transformer device body normal operation, its winding temperature value are micro- not less than the trip temperature protection seting value pre-set Processor does not send instruction；6）Work as SF6Serious heating defect occurs for main transformer winding in main transformer device body, and its temperature reaches the trip temperature pre-set and protected When protecting setting valve, microprocessor sends trip command signal, controls circuit breaker trip coil motion, its moving contact is departed from rapidly Static contact, cut off SF6Main transformer device body incoming call side power supply, by the SF of this serious heating accident6Main transformer device body by force with power network every Leave, the safety of staff and main transformer can either be protected, and can enough protects the safe operation of bulk power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307430.8A CN107834512B (en) | 2017-12-11 | 2017-12-11 | Power SF6 main transformer non-electric quantity protection device and protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307430.8A CN107834512B (en) | 2017-12-11 | 2017-12-11 | Power SF6 main transformer non-electric quantity protection device and protection method |
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| CN107834512A true CN107834512A (en) | 2018-03-23 |
| CN107834512B CN107834512B (en) | 2023-09-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116878741A (en) * | 2023-09-06 | 2023-10-13 | 江苏炎启自动化有限公司 | Detection device for GIS indoor gas leakage and application method thereof |
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| CN116878741B (en) * | 2023-09-06 | 2023-12-01 | 江苏炎启自动化有限公司 | Detection device for GIS indoor gas leakage and application method thereof |
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