CN208188242U - A kind of shorted-turn fault positioning system - Google Patents
A kind of shorted-turn fault positioning system Download PDFInfo
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- CN208188242U CN208188242U CN201820862256.7U CN201820862256U CN208188242U CN 208188242 U CN208188242 U CN 208188242U CN 201820862256 U CN201820862256 U CN 201820862256U CN 208188242 U CN208188242 U CN 208188242U
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Abstract
The utility model discloses a kind of shorted-turn fault positioning systems; including impulse generating unit, data acquisition unit, protection location, breakdown judge and positioning unit, data storage cell and display unit; the output end of impulse generating unit is connected with the both ends of rotor coil; the input terminal of data acquisition unit is connected by protection location with the both ends of rotor coil; the output end of data acquisition unit is connected with the input terminal of breakdown judge and positioning unit, and data storage cell, display unit are connected with breakdown judge and positioning unit respectively.The utility model structure is simple, reliable, small in size, light-weight, and is protected by protection location to data acquisition unit, can prevent over-voltage or overcurrent from damaging to system；And tested coil fault judgement and fault location are realized by similarity calculation, coil fault location efficiency is improved, while but also diagnostic result is relatively reliable.
Description
Technical field
The utility model belongs to coil turn-to-turn short circuit fault diagnosis technology field, is related to a kind of shorted-turn fault positioning system
System.
Background technique
The power part most crucial as electric system, is responsible for main power generation task, its operational reliability is straight
Connect the safe operation for influencing power grid.It is right with the rapid development of power industry and the continuous increase of power plant single machine installed capacity
Reliability requirement when operation is higher and higher.Once break down especially pernicious failure, then it will affect entire electric system
It runs well, brings massive losses to national economy.Have investigation to show: in the large-scale groups run, coil turn-to-turn is short
One of the typical fault that road is, and occupy larger proportion in failure sum.Therefore, the turn-to-turn insulation of coil windings is found as early as possible
Problem is extremely important for the safe operation of guarantee, and Accurate Diagnosis and set winding shorted-turn fault position have important meaning
Justice.
Repetition pulse method is a kind of simple and effective turn-to-turn short circuit lossless detection method, and testing principle is analysis injection line
The back wave of the pulse signal of winding and the response characteristic curve of refracted wave are enclosed, turn-to-turn short circuit is judged according to the feature of indicatrix
Abort situation.
Patent No. CN105277835A discloses the localization method and device of Short Circuit Between Generator Rotor Windings failure, the hair
It is bright that rotor windings signature waveform is obtained using repetition pulse method, by being searched therewith in pre-set signature waveform database
The signature waveform to match obtains the corresponding fault location information of this feature waveform to position rotor inter-turn short circuit abort situation.
The invention focuses on to describe how the data-base recording of the signature waveform to match using the response difference waveform obtained with detection
Information determines the shorted-turn fault position of rotor, since data collection terminal needs to connect with coil, but without mentioning
And corresponding safeguard measure is taken to data acquisition unit, cause fault locator to be easy to cause damage.
Summary of the invention
The utility model in view of the deficiencies of the prior art, proposes that one kind can prevent over-voltage or overcurrent from damaging to system
Shorted-turn fault positioning system.
To achieve the goals above, the utility model uses following technical scheme:
A kind of shorted-turn fault positioning system, including impulse generating unit, data acquisition unit, protection location, failure
Judgement and positioning unit, data storage cell and display unit；The two of the output end of the impulse generating unit and rotor coil
End is connected；The input terminal of the data acquisition unit is connected by protection location with the both ends of rotor coil；The data
The output end of acquisition unit is connected with the input terminal of breakdown judge and positioning unit；The data storage cell, display are single
Member is connected with the breakdown judge and positioning unit respectively.
As further technological improvement, the impulse generating unit includes shell I and is arranged in shell I
Pulse signal generation circuit and miniature transformer I；The shell I is equipped with pulse output end mouth and switch I；The pulse
Output port and switch I are integrated on pulse signal generation circuit respectively；Pulse is connected on the pulse output end mouth
Output line is equipped with connection plug I on the other end of pulse output line；The connection plug I is mounted on rotor coil；Institute
Power supply line I is connected on the miniature transformer I stated；The pulse signal generation circuit is electrically connected with miniature transformer I.
As further technological improvement, the data acquisition unit includes shell II and is mounted in shell II
Pulse signal acquisition card and miniature transformer II；It is defeated that the shell II is equipped with pulse input port, switch II and data
Exit port；Pulse input port, switch II and the data-out port is integrated in respectively on pulse signal acquisition card；It is described
Pulse input port on be connected with pulse input, connection plug II is installed on the other end of pulse input；It is described
Data-out port on be connected with DOL Data Output Line, connection plug III is installed on the other end of DOL Data Output Line；It is described
Miniature transformer II on be connected with power supply line II；The pulse signal acquisition card is electrically connected with miniature transformer II.
As further technological improvement, the protection location is mounted in shell II, protection location and miniature transformation
Device II is electrically connected；The protection location is mainly made of two groups of protection circuits；The protection circuit includes fuse M, capacitor
C, voltage follower N, diode D1 and Zener diode D2；One end of the fuse M and one end of rotor coil connect, and melt
Silk M the other end connect with one end of capacitor C, the other end of capacitor C is connected with the first pin of voltage follower N, voltage with
It is connect with the third pin of device N with one end of Zener diode D2, DC power cathode, the other end and electricity of Zener diode D2
Follower N, DC power anode connection are pressed, the 4th pin of voltage follower N is connect with one end of diode D1, diode D1
The other end connect with the second pin of voltage follower N, connection plug II.
As further technological improvement, the breakdown judge and positioning unit include pulse signal processing unit；Institute
The display unit stated includes display；The data storage cell is memory；The pulse signal processing unit includes
Shell III and it is mounted on the intracorporal pulse signal processing circuit of shell and miniature transformer III；The shell III is equipped with number
According to input port and switch III；Data-in port, switch III and the memory is integrated in pulse signal processing circuit
On；The display, pulse signal processing circuit are electrically connected with miniature transformer III respectively；On the miniature transformer III
It is connected with power supply line III；The display is connected with pulse signal processing circuit；The connection plug III with connect insert
First III is connected.
As further technological improvement, the pulse signal processing circuit is mainly by ZYNQ7020 expansion platform group
At being integrated with arm processor on ZYNQ7020 expansion platform.
Data acquisition unit sample rate is 100Ms/s.
Data storage cell: eMMC memory, memory capacity 4G, for storing rotor coil turn-to-turn repetition pulse are selected
Method signature waveform；Including unfaulty conditions unit and malfunction unit, it is respectively used under storage rotor coil fault-free and deposits
Repetition pulse method signature waveform in shorted-turn fault.
Display unit: liquid crystal display, display resolution 800*480, for showing the spy of measured rotor coil are selected
It levies waveform and whether there is failure.
Breakdown judge and positioning unit: the expansible platform of ZYNQ7020 is selected, similarity analysis program is written
In ZYNQ7020.
Similarity Algorithm is described as follows:
Using correlation coefficient process to the feature in the rotor coil difference response wave shape and failure-free data library of real-time testing
Waveform carries out similarity analysis, similar value calculation are as follows:
Wherein N is phase window number, and x is positive axis discharge capacity mean value in phase window, and y is negative semiaxis discharge capacity in phase window
Mean value.
Whether the difference response wave shape and fault-free signature waveform for judging real-time testing match, specific judgment method
Are as follows:
If ρxy> 0.5: test difference response wave shape matches with signature waveform in failure-free data library；
If ρxy< 0.5: signature waveform mismatches in test difference response wave shape and failure-free data library.
If testing difference response wave shape and database fault-free signature waveform mismatching, feature in Mishap Database is utilized
Waveform carries out similarity analysis to test difference response wave shape, and it is similar to fault signature waveform to obtain test difference response wave shape
Value ρxy；
It is found according to the similar value of calculating and tests the higher fault signature waveform of difference response wave shape matching degree, similar value
Closer to 1, similarity is higher.Its finding method are as follows:
0.8<ρxy≤ 1: height is similar；
0.5≤ρxy≤ 0.8: significant similar；
ρxy< 0.5: uncorrelated.
Working principle of the utility model is:
Impulse generating unit exports the identical repetition pulse of two-way to rotor coil both ends, data acquisition unit acquisition
The back wave and refracted wave of rotor coil two sides；Protection location can prevent excessive voltage or electric current from making to data acquisition unit
At damage；Then repetition pulse signature waveform is sent to breakdown judge by communication bus by data acquisition unit and positioning is single
Member, breakdown judge and positioning unit are according to built-in Similarity Algorithm in the signature waveform and data storage cell of test acquisition
Fault signature waveform carry out similarity calculation, according to similar value screen the higher signature waveform of similarity, judge by test coil
Whether break down, and according to the shorted-turn fault acquisition of information failure turn-to-turn position of the waveform, simultaneous faults judges and determines
Bit location can be shown on the display module by signature waveform and with the presence or absence of information such as failures.
Compared with prior art, the utility model have the utility model has the advantages that
1. the utility model structure is simple, reliable, small in size, light-weight, it is suitble to participate in detection under various applications
Coil turn-to-turn short circuit failure.
2. the utility model calls signature waveform and the comparison of tested winding waveform in data storage cell, pass through similarity
It calculates and realizes that tested coil fault judgement and fault location, analytic process avoid the positioning for fault-free signature waveform point
Analysis, improves coil fault location efficiency, while but also diagnostic result is relatively reliable.
3. the utility model protects data acquisition unit by protection location, can prevent data acquisition because
System is damaged for over-voltage or overcurrent.
Detailed description of the invention
Fig. 1 is the systematic schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of impulse generating unit in the utility model.
Fig. 3 is the structural schematic diagram of data acquisition unit in the utility model.
Fig. 4 is the structural schematic diagram of pulse signal processing apparatus in the utility model.
Fig. 5 is the circuit diagram that circuit is protected in the utility model.
Fig. 6 is similarity algorithm flow chart in the utility model.
Appended drawing reference: 1- connection plug I, 2- pulse output line, 3- shell I, 4- pulse output end mouth, 5- power supply line I, 6-
Switch I, 7- connection plug II, 8- pulse input, 9- shell II, 10- pulse input port, 11- DOL Data Output Line, 12- are opened
Pass II, 13- power supply line II, 14- data-in port, 15- switch III, 16- shell III, 17- display, 18- power supply line III,
19- connection plug III, 20- data-out port.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Embodiment 1:
A kind of shorted-turn fault positioning system, including impulse generating unit, data acquisition unit, protection location, failure
Judgement and positioning unit, data storage cell and display unit；The two of the output end of the impulse generating unit and rotor coil
End is connected；The input terminal of the data acquisition unit is connected by protection location with the both ends of rotor coil；The data
The output end of acquisition unit is connected with the input terminal of breakdown judge and positioning unit；The data storage cell, display are single
Member is connected with the breakdown judge and positioning unit respectively.
The impulse generating unit includes shell I 3 and the pulse signal generation circuit being arranged in shell I 3 and micro-
Type transformer I；The shell I 3 is equipped with pulse output end mouth 4 and switch I 6；The pulse output end mouth 4 and switch I 6
It is integrated on pulse signal generation circuit respectively；It is connected with pulse output line 2 on the pulse output end mouth 4, pulse is defeated
Connection plug I 1 is installed on the other end of outlet 2；The connection plug I 1 is mounted on rotor coil；The miniature change
Power supply line I 5 is connected on depressor I；The pulse signal generation circuit is electrically connected with miniature transformer I.
The data acquisition unit includes shell II 9 and the pulse signal acquisition card being mounted in shell II 9 and micro-
Type transformer II；The shell II 9 is equipped with pulse input port 10, switch II 12 and data-out port 20；Described
Pulse input port 10, switch II 12 and data-out port 20 are integrated in respectively on pulse signal acquisition card；The pulse
It is connected with pulse input 8 on input port 10, connection plug II 7 is installed on the other end of pulse input 8；Described
It is connected with DOL Data Output Line 11 on data-out port 20, connection plug III is installed on the other end of DOL Data Output Line 11
19；Power supply line II 13 is connected on the miniature transformer II；The pulse signal acquisition card and miniature transformer II
It is electrically connected.
The protection location is mounted in shell II 9, and protection location is electrically connected with miniature transformer II；The protection
Unit is mainly made of two groups of protection circuits；The protection circuit includes fuse M, capacitor C, voltage follower N, diode D1
With Zener diode D2；One end of the fuse M and one end of rotor coil connect, the other end of fuse M and the one of capacitor C
End connection, the other end of capacitor C are connected with the first pin of voltage follower N, the third pin and Zener two of voltage follower N
One end of pole pipe D2, DC power cathode connection, the other end and voltage follower N, DC power anode of Zener diode D2
Connection, the 4th pin of voltage follower N are connect with one end of diode D1, the other end and voltage follower N of diode D1
Second pin, connection plug II 7 connect.
The breakdown judge and positioning unit includes pulse signal processing unit；The display unit includes display
17；The data storage cell is memory；The pulse signal processing unit includes shell III 16 and is mounted on shell
Intracorporal pulse signal processing circuit and miniature transformer III；The shell III 16 is equipped with data-in port 14 and switch
Ⅲ15；Data-in port 14, switch III 15 and the memory is integrated on pulse signal processing circuit；Described is aobvious
Show that device 17, pulse signal processing circuit are electrically connected with miniature transformer III respectively；It is connected on the miniature transformer III
Power supply line III 18；The display 17 is connected with pulse signal processing circuit；The connection plug III 19 and connection plug
III 19 are connected.
The pulse signal processing circuit is mainly made of ZYNQ7020 expansion platform, is collected on ZYNQ7020 expansion platform
At there is arm processor.
The working principle of the embodiment:
Impulse generating unit exports the identical repetition pulse of two-way to rotor coil both ends, data acquisition unit acquisition
The back wave and refracted wave of rotor coil two sides；Protection location can prevent excessive voltage or electric current from making to data acquisition unit
At damage；Then repetition pulse signature waveform is sent to breakdown judge by communication bus by data acquisition unit and positioning is single
Member, breakdown judge and positioning unit are according to built-in Similarity Algorithm in the signature waveform and data storage cell of test acquisition
Fault signature waveform carry out similarity calculation, according to similar value screen the higher signature waveform of similarity, judge by test coil
Whether break down, and according to the shorted-turn fault acquisition of information failure turn-to-turn position of the waveform, simultaneous faults judges and determines
Bit location can be shown on the display module by signature waveform and with the presence or absence of information such as failures.
Claims (6)
1. a kind of shorted-turn fault positioning system, it is characterised in that: including impulse generating unit, data acquisition unit, protection
Unit, breakdown judge and positioning unit, data storage cell and display unit；The output end and rotor of the impulse generating unit
The both ends of coil are connected；The input terminal of the data acquisition unit is connected by protection location with the both ends of rotor coil；
The output end of the data acquisition unit is connected with the input terminal of breakdown judge and positioning unit；The data store single
Member, display unit are connected with the breakdown judge and positioning unit respectively.
2. a kind of shorted-turn fault positioning system according to claim 1, it is characterised in that: the pulse generation list
Member includes the pulse signal generation circuit and miniature transformer I of shell I (3) and setting in shell I (3)；The shell
I (3) are equipped with pulse output end mouth (4) and switch I (6)；The pulse output end mouth (4) and switch I (6) are integrated in respectively
On pulse signal generation circuit；It is connected with pulse output line (2) on the pulse output end mouth (4), pulse output line (2)
The other end on connection plug I (1) is installed；The connection plug I (1) is mounted on rotor coil；The miniature change
Power supply line I (5) is connected on depressor I；The pulse signal generation circuit is electrically connected with miniature transformer I.
3. a kind of shorted-turn fault positioning system according to claim 1, it is characterised in that: the data acquire single
Member includes shell II (9) and the pulse signal acquisition card and miniature transformer II that are mounted in shell II (9)；The shell
Body II (9) is equipped with pulse input port (10), switch II (12) and data-out port (20)；The pulse input port
(10), switch II (12) and data-out port (20) are integrated in respectively on pulse signal acquisition card；The pulse input end
It is connected with pulse input (8) on mouth (10), connection plug II (7) is installed on the other end of pulse input (8)；It is described
Data-out port (20) on be connected with DOL Data Output Line (11), connection is installed on the other end of DOL Data Output Line (11)
Plug III (19)；Power supply line II (13) is connected on the miniature transformer II；The pulse signal acquisition card with it is micro-
Type transformer II is electrically connected.
4. a kind of shorted-turn fault positioning system according to claim 3, it is characterised in that: the protection location peace
In shell II (9), protection location is electrically connected with miniature transformer II；The protection location is mainly by two groups of protection circuits
Composition；The protection circuit includes fuse M, capacitor C, voltage follower N, diode D1 and Zener diode D2；Described
One end of fuse M and one end of rotor coil connect, and the other end of fuse M is connect with one end of capacitor C, the other end of capacitor C
It is connected with the first pin of voltage follower N, the third pin of voltage follower N and one end, the direct current of Zener diode D2
The connection of source cathode, the other end of Zener diode D2 connect with voltage follower N, DC power anode, and the of voltage follower N
Four pins are connect with one end of diode D1, the other end of diode D1 and second pin, the connection plug II of voltage follower N
(7) it connects.
5. a kind of shorted-turn fault positioning system according to claim 4, it is characterised in that: the breakdown judge and
Positioning unit includes pulse signal processing unit；The display unit includes display (17)；The data storage cell
For memory；The pulse signal processing unit includes shell III (16) and is mounted on shell intracorporal pulse signal processing
Circuit and miniature transformer III；The shell III (16) is equipped with data-in port (14) and switch III (15)；Described
Data-in port (14), switch III (15) and memory are integrated on pulse signal processing circuit；The display
(17), pulse signal processing circuit is electrically connected with miniature transformer III respectively；Electricity is connected on the miniature transformer III
Source line III (18)；The display (17) is connected with pulse signal processing circuit；The connection plug III (19) with connect
Plug III (19) is connected.
6. a kind of shorted-turn fault positioning system according to claim 5, it is characterised in that: at the pulse signal
Reason circuit is mainly made of ZYNQ7020 expansion platform, is integrated with arm processor on ZYNQ7020 expansion platform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820862256.7U CN208188242U (en) | 2018-06-05 | 2018-06-05 | A kind of shorted-turn fault positioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820862256.7U CN208188242U (en) | 2018-06-05 | 2018-06-05 | A kind of shorted-turn fault positioning system |
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| CN208188242U true CN208188242U (en) | 2018-12-04 |
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| CN201820862256.7U Active CN208188242U (en) | 2018-06-05 | 2018-06-05 | A kind of shorted-turn fault positioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142963A (en) * | 2018-06-05 | 2019-01-04 | 广西电网有限责任公司桂林供电局 | A kind of shorted-turn fault positioning system and method |
-
2018
- 2018-06-05 CN CN201820862256.7U patent/CN208188242U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142963A (en) * | 2018-06-05 | 2019-01-04 | 广西电网有限责任公司桂林供电局 | A kind of shorted-turn fault positioning system and method |
| CN109142963B (en) * | 2018-06-05 | 2020-09-29 | 广西电网有限责任公司桂林供电局 | Interturn short circuit fault positioning system and method |
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