CN106992497A - A kind of intelligent protection device of main transformer internal discharge failure and guard method - Google Patents
A kind of intelligent protection device of main transformer internal discharge failure and guard method Download PDFInfo
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- CN106992497A CN106992497A CN201710391439.5A CN201710391439A CN106992497A CN 106992497 A CN106992497 A CN 106992497A CN 201710391439 A CN201710391439 A CN 201710391439A CN 106992497 A CN106992497 A CN 106992497A
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- main transformer
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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
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention provides intelligent protection device and the guard method of a kind of main transformer internal discharge failure, the device it include N number of high definition multiple dot array and insulate camera, AD converter, D/A converter, display, protection location and control module；N number of high definition multiple dot array insulation camera, N number of high definition multiple dot array insulation camera is arranged on inside main transformer and just to main transformer winding；The output end of high definition multiple dot array insulation camera is electrically connected with AD converter input, display respectively；The input of the output end of the AD converter and a control module is electrically connected with；The output end of the control module and the input of D/A converter are electrically connected with；The output end of the D/A converter and the input of a protection location are electrically connected with.Compared by high definition multiple dot array insulation camera captured in real-time and image, so as to judge whether power high voltage equipment occurs discharge fault, and fault degree, and the grade that needs are protected in the very first time.
Description
Technical field
The present invention relates to a kind of protection device of main transformer discharge fault and guard method, particularly a kind of main transformer internal discharge
The intelligent protection device of failure and guard method.
Background technology
Main transformer internal discharge failure is mainly entered by characteristic gas chromatography in oil and supersonic test in now running
There is problems with row detection, both approaches：
1）Characteristic gas chromatography is cleverer in the detection of certain rate of rise to chronic discharge fault and discharge fault in oil
It is quick, but in time linear, happen suddenly pernicious discharge fault due to around discharge fault point oil pyrolysis gas back dissolving is in oil and expands
Being dissipated to sample tap needs the long period, therefore often delayed, need to wait until that longer period of time occurs for discharge fault, could be tried by chromatogram
Detection is tested to find.
2）Supersonic test is then too many due to disturbing factor, and ambient noise etc. is often in itself covered discharge fault.
The content of the invention
It is an object of the present invention to provide a kind of intelligent protection device of main transformer internal discharge failure and guard method.
The present invention is realized using following technical scheme：A kind of intelligent protection device of main transformer internal discharge failure, its feature
It is：Including N number of high definition multiple dot array insulation camera, AD converter, D/A converter, display, protection location and control module；
N number of high definition multiple dot array insulation camera, N number of high definition multiple dot array insulation camera is arranged on inside main transformer and just to main transformer winding；
The output end of high definition multiple dot array insulation camera is electrically connected with AD converter input, display respectively；The AD converter
The input of output end and a control module be electrically connected with；The output end of the control module and the input electricity of D/A converter
Property connection；The output end of the D/A converter and the input of a protection location are electrically connected with；In main transformer internal discharge phenomenon hair
When raw, the high definition multiple dot array insulation camera inside main transformer grasps electric discharge image, and is schemed electric discharge by insulating optical fiber
As the display and AD converter outside electric signal transmission to main transformer, display shows electric discharge video image in real time, for operations staff
Check, analyze；The AD converter electric image signal that will discharge is changed into after data signal and is sent to control module；Control module control is protected
Protect unit action.
In an embodiment of the present invention, the protection location includes alarm and main transformer breaker open operation coil.
In an embodiment of the present invention, N number of high definition multiple dot array insulation camera keeps voltage security distance with live part.
In an embodiment of the present invention, the control module can be PLC.
In an embodiment of the present invention, N is 2.
The present invention also provides a kind of intelligent protection method of main transformer internal discharge failure, it is characterised in that including following step
Suddenly：Comprise the following steps：S1：When occurring discharge fault inside main transformer, the high definition multiple dot array insulation inside main transformer is taken the photograph
As head:Capture electric discharge image, and electric image signal of discharging is transmitted separately to outside main transformer by insulating optical fiber display and
AD converter；S2：Display shows electric discharge video image in real time, and electric discharge electric image signal is changed into data signal by AD converter
After be sent to control module；Control module is by pre-setting the various main transformer discharge fault series standard images of storage and receive
The image that discharges carries out contrast comparison；S3：When the electric discharge image received reaches the alarm degree data signal of respective standard image
During value, control module transmits alarm number signal to D/A converter, and the data signal received is converted into electricity by D/A converter
Signal is sent to protection location, and protection location is according to the electric discharge image converted electrical number value pre-set, control alarm difference
Send and slightly climb electricity, moderate spark discharge or arc discharge alarm signal, remind operations staff to take measures as early as possible；Burst is disliked
Property discharge fault, protection location according to the pernicious discharge fault electric image signal value of the burst pre-set, automatically control main transformer break
Road device switching winding action, makes moving contact of breaker depart from static contact, cuts off the electricity supply.
In an embodiment of the present invention, the discharge fault electric image signal that D/A converter output end is changed out is voltage, electricity
Stream, increased resistance value or capacitance variations value.
The directly perceived of power equipment second protection can be carried out according to main transformer internal discharge phenomenon in operation there is presently no a kind of
Method, traditional discharge fault is all will in electric discharge, the variable quantity such as electricity, magnetic, heat, the ripple that produce judges according to power equipment
And action, this is often difficult to promptly and accurately find discharge fault under current technical conditions, there is serious delayed, disturbing factor
It is many, or the shortcomings of judge inaccurate.The present invention is that the various electric discharge collection of illustrative plates in main transformer are configured into storage, formulates Comparison of standards
Compare serial, when live main transformer inside generation discharge fault, by high definition multiple dot array insulation camera by electric discharge image and originally
The standard diagram set carries out contrast comparison, so as to judge whether power high voltage equipment occurs electric discharge event in the very first time
Barrier, and fault degree, and the grade that needs are protected.
Brief description of the drawings
Fundamental diagram when the intelligent protection device main transformer of Fig. 1 main transformer internal discharge failures is normally run.
The intelligent protection device of Fig. 2 main transformer internal discharge failures occurs slightly climbing discharge of electricity failure alarm device in main transformer
Alert operation schematic diagram.
There is operation principle during spark discharge failure inside main transformer in the intelligent protection device of Fig. 3 main transformer internal discharge failures
Figure.
There is operation principle during Arcing fault inside main transformer in the intelligent protection device of Fig. 4 main transformer internal discharge failures
Figure
Working during the pernicious Arcing fault of burst occurs inside main transformer in the intelligent protection device of Fig. 5 main transformer internal discharge failures
Schematic diagram.
Operation principle when the intelligent protection device main transformer breaker open operation coil of Fig. 6 main transformer internal discharge failures is failure to actuate
Figure.
The intelligent protection device of Fig. 7 main transformer internal discharge failures main transformer breaker open operation line when happening suddenly pernicious discharge fault
Act fundamental diagram.
【Label declaration】
1- high definitions multiple dot array insulation camera；2- optical fiber；3-AD converters；4- displays；5- control modules；6- warning devices；
7- main transformers；8- sleeve of main transformer；9- main transformer windings；10- high pressure inlet wires；11- high-voltage terminals；12- main transformer breakers；13- breakers
Static contact；14- moving contact of breaker；15- high-voltage connections；16- breaker open operation coils；17-DA converters.
Embodiment
Explanation is further explained to the present invention with reference to the accompanying drawings and detailed description.
The present invention provides a kind of intelligent protection device of main transformer internal discharge failure, and it includes N number of high definition multiple dot array insulation
Camera, AD converter, D/A converter, display, protection location and control module；N number of high definition multiple dot array insulation camera, N
Individual high definition multiple dot array insulation camera is arranged on inside main transformer and just to main transformer winding；The output of high definition multiple dot array insulation camera
End is electrically connected with AD converter input, display respectively；The input of the output end of the AD converter and a control module
End is electrically connected with；The output end of the control module and the input of D/A converter are electrically connected with；The output of the D/A converter
End and the input of a protection location are electrically connected with；When main transformer internal discharge phenomenon occurs, the high definition inside main transformer
Multiple dot array insulation camera grasps electric discharge image, and electric discharge electric image signal is transmitted into the display to outside main transformer by insulating optical fiber
Device and AD converter, display show electric discharge video image in real time, check, analyze for operations staff；AD converter, which will discharge, schemes
Control module is sent to as electric signal is changed into after data signal；Control module control and protection unit is acted.
In an embodiment of the present invention, the protection location includes alarm and main transformer breaker open operation coil.
In an embodiment of the present invention, N number of high definition multiple dot array insulation camera keeps voltage security distance with live part.
In an embodiment of the present invention, the control module can be PLC.
In an embodiment of the present invention, N is 2.
The present invention also provides a kind of intelligent protection method of main transformer internal discharge failure, and it comprises the following steps：Including with
Lower step：S1：When occurring discharge fault inside main transformer, the high definition multiple dot array insulation camera inside main transformer:Catch
To electric discharge image, and the display and AD converter that electric image signal of discharging is transmitted separately to outside main transformer by insulating optical fiber；
S2：Display shows electric discharge video image in real time, and the AD converter electric image signal that will discharge is changed into after data signal and is sent to control
Molding block；Control module is by the various main transformer discharge fault series standard images for pre-setting storage and the electric discharge image received
Carry out contrast comparison；S3：When the electric discharge image received reaches the alarm degree digital signal value of respective standard image, control
Module transmits alarm number signal to D/A converter, and the data signal received is converted into electric signal and is sent to by D/A converter
Protection location, protection location is according to the electric discharge image converted electrical number value pre-set, and control alarm is sent respectively slightly climbs
Electricity, moderate spark discharge or arc discharge alarm signal, remind operations staff to take measures as early as possible；To the pernicious electric discharge event that happens suddenly
Barrier, protection location automatically controls main transformer breaker open operation according to the pernicious discharge fault electric image signal value of the burst pre-set
Coil motion, makes moving contact of breaker depart from static contact, cuts off the electricity supply.
In an embodiment of the present invention, the discharge fault electric image signal that D/A converter output end is changed out is voltage, electricity
Stream, increased resistance value or capacitance variations value.
Referring to Fig. 1-7, in a specific embodiment of the invention, a kind of intelligent protection device of main transformer internal discharge failure and
Guard method, its guard method is specific as follows：
1）Set and be programmed with control module 5 in advance：The digital standard electric discharge image of various main transformer discharge faults, be respectively：
Slightly climb electric digital standard image program, moderate spark discharge digital standard image program and it is serious when arc discharge numeral mark
Quasi- image and the pernicious electric arc arc discharge digital standard image program that happens suddenly.
2）Separating brake is set to act value of electrical signals in the switching winding 16 of main transformer breaker 12 of protection location in advance.
3）When main transformer 7 is normally run, intelligent protection device is put into operation, and no generation electric discharge phenomena, control module 5 is not bristled with anger
Order.
4）When the inside of main transformer 7 occurs slightly to climb electric fault, photographed by high definition multiple dot array insulation camera 1 and slightly climb electricity
Video image, and this video image electric signal is respectively sent to AD converter 3 and display 4 by optical fiber 2.
5）Electric video image is climbed in display to display 4 in real time, for operations staff's observation analysis.
6）AD converter 3, which slight will climb TV frequency electric image signal and be converted into after data signal, to be transmitted to control module 5.
7）Slightly climbing TV frequency image digital signal and pre-setting the slight of programming for receiving is climbed electricity by control module 5
Digital standard image program is contrasted, when reach it is set slight climb electric standard scope be set when, control module 5 refers to control
Order is sent to D/A converter 17.
8）The slight electric control instruction data signal of climbing sent by control module 5 is converted to electric signal by D/A converter 17,
It is sent to the warning device 6 of protection location.
9）Warning device 6 sends slight soft discharge fault alarm, reminds operations staff to take treatment measures.
10）When the moderate discharge fault of the inside flashing electric discharge of main transformer 7, pass through high definition multiple dot array insulation camera 1
Spark discharge video image is photographed, and this video image electric signal is respectively sent to AD converter 3 and display by optical fiber 2
4。
11）Display 4 shows spark discharge video image in real time, for operations staff's observation analysis.
12）Spark discharge video image electric signal is converted into after data signal and transmitted to control module 5 by AD converter 3.
13）Control module 5 puts the spark discharge video image data signal received with pre-setting the spark of programming
Electric digital standard image program is contrasted, and when reaching that set spark discharge standard sets scope, control module 5 will be controlled
Instruction is sent to D/A converter 17.
14）The spark discharge control instruction data signal sent by control module 5 is converted to electric signal by D/A converter 17,
It is sent to the warning device 6 of protection location.
15）Warning device 6 sends ear-piercing discharge fault alarm, and with flash glint warning, reminds operations staff to use up
Treatment measures are taken soon.
16）When Arcing fault occurs for the inside of main transformer 7, electric arc is photographed by high definition multiple dot array insulation camera 1 and put
Electric video image, and this video image electric signal is respectively sent to AD converter 3 and display 4 by optical fiber 2.
17）Display 4 shows arc discharge video image in real time, for operations staff's observation analysis.
18）Arc discharge video image electric signal is converted into after data signal and transmitted to control module 5 by AD converter 3.
19）Control module 5 puts the arc discharge video image data signal received with pre-setting the electric arc of programming
Electric digital standard image program is contrasted, and when reaching that set arc discharge standard sets scope, control module 5 will be controlled
Instruction is sent to D/A converter 17.
20）The arc discharge control instruction data signal sent by control module 5 is converted to electric signal by D/A converter 17,
It is sent to the warning device 6 of protection location.
21）Warning device 6 sends the urgent shrillness alarm of Arcing fault, while accompanied by intense flicker flash of light police
Show, remind operations staff to take power failure treatment measures immediately.
22）When pernicious electric arc arc discharge failure occurs to happen suddenly for the inside of main transformer 7, pass through high definition multiple dot array insulation camera
1 photographs the pernicious electric arc arc discharge video image of burst, and this video image electric signal is respectively sent into AD turns by optical fiber 2
Parallel operation 3 and display 4.
23）The pernicious electric arc arc discharge video image of the display burst in real time of display 4, for operations staff's observation analysis.
24）The pernicious electric arc arc discharge video image electric signal of burst is converted into transmission after data signal by AD converter 3
To control module 5.
25）Control module 5 is by the pernicious electric arc arc discharge video image data signal of the burst received with pre-setting
The pernicious electric arc arc discharge digital standard image program of burst of programming is contrasted, when reaching the set pernicious electric arc arc of burst
When light electric discharge standard sets scope, control instruction is sent to D/A converter 17 by control module 5.
26）D/A converter 17 is by the pernicious electric arc arc discharge control instruction data signal of the burst sent by control module 5
Electric signal is converted to, protection location is sent to, protection location automatically controls the switching winding 16 of main transformer breaker 12 and acted, and makes breaker
Moving contact 14 departs from static contact 13, cuts off the electricity supply, prevents fault spread, while warning device 6 sends the pernicious electric arc arc light of burst
The urgent ear-piercing antiaircraft alarm of discharge fault, while with dazzling intense flashes flash-caution.
The foregoing is only presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, should all belong to the covering scope of the present invention.
Claims (7)
1. a kind of intelligent protection device of main transformer internal discharge failure, it is characterised in that：Insulate and image including N number of high definition multiple dot array
Head, AD converter, D/A converter, display, protection location and control module；
N number of high definition multiple dot array insulate camera, N number of high definition multiple dot array insulation camera be arranged on inside main transformer and just to main transformer around
Group；The output end of high definition multiple dot array insulation camera is electrically connected with AD converter input, display respectively；The AD conversion
The input of the output end of device and a control module is electrically connected with；The output end of the control module and the input of D/A converter
It is electrically connected with；The output end of the D/A converter and the input of a protection location are electrically connected with；In main transformer internal discharge phenomenon
During generation, the high definition multiple dot array insulation camera inside main transformer grasps electric discharge image, and will be discharged by insulating optical fiber
Electric image signal transmits display and AD converter to outside main transformer, and display shows electric discharge video image in real time, for operation people
Member checks, analyzed；The AD converter electric image signal that will discharge is changed into after data signal and is sent to control module；Control module is controlled
Protection location is acted.
2. the intelligent protection device of main transformer internal discharge failure according to claim 1, it is characterised in that：The protection is single
Member includes alarm and main transformer breaker open operation coil.
3. the intelligent protection device of main transformer internal discharge failure according to claim 1, it is characterised in that：N number of high definition is more
Dot matrix insulation camera keeps voltage security distance with live part.
4. the intelligent protection device of main transformer internal discharge failure according to claim 1, it is characterised in that：The control mould
Block can be PLC.
5. the intelligent protection device of main transformer internal discharge failure according to claim 1, it is characterised in that：N is 2.
6. a kind of intelligent protection method of main transformer internal discharge failure, it is characterised in that comprise the following steps：Including following step
Suddenly：
S1：When occurring discharge fault inside main transformer, the high definition multiple dot array insulation camera inside main transformer:Capture and put
Electrical image, and the display and AD converter that electric image signal of discharging is transmitted separately to outside main transformer by insulating optical fiber；
S2：Display shows electric discharge video image in real time, and electric discharge electric image signal is changed into hair after data signal by AD converter
Toward control module；Control module is by the various main transformer discharge fault series standard images for pre-setting storage and the electric discharge received
Image carries out contrast comparison；
S3：When the electric discharge image received reaches the alarm degree digital signal value of respective standard image, control module will be reported
The data signal received is converted into electric signal and is sent to protection list by alert digital data transmission to D/A converter, D/A converter
Member, protection location is according to the electric discharge image converted electrical number value pre-set, and control alarm is sent respectively slightly climbs electricity, moderate
Spark discharge or arc discharge alarm signal, remind operations staff to take measures as early as possible；To the pernicious discharge fault that happens suddenly, protection is single
Member automatically controls main transformer breaker open operation coil motion according to the pernicious discharge fault electric image signal value of burst pre-set,
Moving contact of breaker is departed from static contact, cut off the electricity supply.
7. the intelligent protection method of main transformer internal discharge failure according to claim 6, it is characterised in that：D/A converter is defeated
It is voltage, electric current, increased resistance value or capacitance variations value to go out the discharge fault electric image signal changed out at end.
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| CN106992497B (en) | 2018-08-17 |
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