CN105334456B - Double tap-changing windings power transformer load tap changer testers and fault detection method - Google Patents
Double tap-changing windings power transformer load tap changer testers and fault detection method Download PDFInfo
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- CN105334456B CN105334456B CN201510747288.3A CN201510747288A CN105334456B CN 105334456 B CN105334456 B CN 105334456B CN 201510747288 A CN201510747288 A CN 201510747288A CN 105334456 B CN105334456 B CN 105334456B
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- 238000004804 winding Methods 0.000 title claims abstract description 53
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 52
- 238000005259 measurement Methods 0.000 claims abstract description 44
- 238000004891 communication Methods 0.000 claims description 33
- 230000003750 conditioning effect Effects 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000013024 troubleshooting Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
A kind of double tap-changing windings power transformer load tap changer testers, it is characterised in that：The tester includes：DC power supplier, measurement module and processing module；DC power supplier connects processing module with measurement module.Compared to the prior art, double tap-changing windings power transformer load tap changer testers of the present invention can carry out fault detection to the load ratio bridging switch containing double tap-changing windings, convenience is provided for power transformer load tap changer maintenance, provides reference frame for troubleshooting.
Description
Technical field
The present invention relates to one kind to be used for double tap-changing windings transformer on-load tap changer testers and its fault detection method,
Belong to the field of test technology.
Background technique
Power transformer load tap changer is power system stability load voltage, adjustment trend, improves without the distribution of work
Important equipment, reliability service are significant to transformer and safe operation of power system.
Traditional load ratio bridging switch detection method is examined mainly for the failure of single tap-changing windings load ratio bridging switch
It surveys, and there are also the load ratio bridging switches of a certain number of double tap-changing windings in power grid, such as high voltage DC power transmission converter station transformer.
Double tap-changing windings load ratio bridging switches include two tap-changing windings, parallel running.Traditional on-load tap changer tester needle
Fault detection is carried out to single tap-changing windings load ratio bridging switch, can not identify each item pressure winding parallel branch specific works state,
Thus there is limitation.
In view of the foregoing, it is necessary to which a kind of detection side that can identify double tap-changing windings load ratio bridging switch failures is provided
Method, to solve the above problems.
Summary of the invention
Goal of the invention：
The present invention provides a kind of double tap-changing windings power transformer load tap changer testers and fault detection method,
Purpose be solve it is the problems of previous.
Technical solution：
A kind of double tap-changing windings power transformer load tap changer testers, it is characterised in that：The tester includes：Directly
Galvanic electricity source module, measurement module and processing module；DC power supplier connects processing module with measurement module.
DC power supplier includes communication unit, current control unit, controllable current unit and power supply, the communication unit
Member connection current control unit and processing module, realize the communication between current control unit and processing module, current control list
Member connection controllable current unit, power supply provide required electric energy for DC power supplier.
The measurement module includes voltage signal conditioning unit, current signal conditioning unit, measurement processing unit, communication
Unit and power supply, voltage signal conditioning unit, current signal conditioning unit, communication unit and power supply connect with measurement processing unit
It connects.
The processing module includes analysis and processing unit, input unit, display unit, communication unit and power supply, input
Unit, display unit, communication unit and power supply are connect with analysis and processing unit.
The display unit is liquid crystal display.
The input unit is touch screen, keyboard and mouse.
The fault detection method implemented using above-mentioned double tap-changing windings power transformer load tap changer testers,
It is characterized in that：This method comprises the following steps：
(1)：Test pattern, i.e. service mode or overhaul mode are selected in tester display unit mode setting interface；
The tap for selecting the DC current values of DC power supply output in tester display unit parameter setting interface and currently testing is opened
Close gear；
(2)：Start DC power supplier and measurement module；
(3)：Acquire tap-changing windings voltage V and electric current I, I01,I02；
(4)：Wavelet analysis is carried out to voltage signal, according to wavelet transformation detail coefficients identification switch action moment and each rank
The section duration；
[A, D]=dwt (V, ' db3 ')；
Wherein, dwt is wavelet transform, and A is wavelet transform approximation coefficient, and B is wavelet transform details system
Number, V are voltage signal time sequential value, and db3 is wavelet basis function；
(5)：According to test pattern, voltage, current signal calculate entire tap switch transition resistance value R or two pressure regulation
The respective transition resistance value R of winding tap switch1And R2；
R=V/I；R1=V/I01；R2=V/I02
Wherein, V is tap-changing windings voltage, and I is tap-changing windings total current, I01And I02Respectively first branch DC current
With second branch DC current.
(6)：According to characteristic values such as each phase duration of switch motion and transition resistance values, using matrix distance algorithm into
Row fault type recognition.Specific algorithm is：
Calculate measurement eigenmatrix XmWith N number of typical fault eigenmatrix XtDistance：Di=Dist (Xm,Xt,i)；
Calculate minimum range：D=min (Di)；
If D=Dk, then determine tap switch for kth class failure.
Wherein, i=1,2 ... ..., N；Dist is matrix Euclidean distance；Min is minimum value function.
Advantage and effect
The present invention provides a kind of double tap-changing windings power transformer load tap changer testers and its fault detection method,
To realize the fault detection to double tap-changing windings load ratio bridging switches.
The beneficial effects of the invention are as follows：Compared to the prior art, double tap-changing windings power transformers of the present invention have
On-load shunting switch tester can carry out fault detection to the load ratio bridging switch containing double tap-changing windings, have load for power transformer
Tap switch maintenance provides convenience, provides reference frame for troubleshooting.
Detailed description of the invention
Fig. 1 is the module diagram of the double tap-changing windings power transformer load tap changer testers of the present invention；
Fig. 2 is the structural schematic diagram of DC power supplier；
Fig. 3 is the structural schematic diagram of measurement module；
Fig. 4 is the schematic diagram of processing module
Fig. 5 is double tap-changing windings power transformer load tap changer fault detection method flow charts.
Each list of reference numerals is in Fig. 1：100, double tap-changing windings power transformer load tap changer testers, 10, direct current
Power module, 20, measurement module, 30, processing module, I, total DC current sensor, V, voltage signal measurement point, L01, transformation
The first source side winding of device, L02, the second source side winding of transformer, L11, the first tap-changing windings of transformer, L12, the second pressure regulation of transformer
Winding, I01, the first tap-changing windings DC current sensor, I02, the second tap-changing windings DC current sensor.
Each list of reference numerals is in Fig. 3：V, voltage signal, I, total DC current, I01, first branch DC current, I02,
Two branch DC currents.
Specific embodiment
Following further describes the present invention with reference to the drawings：
As shown, the invention proposes a kind of double tap-changing windings power transformer load tap changer testers, the survey
Trying instrument includes：DC power supplier, measurement module and processing module；DC power supplier connects processing module with measurement module.
DC power supplier, for generating the DC current signal of injection tap-changing windings；Measurement module, for measuring the electricity of tap-changing windings
Pressure, electric current；Processing module carries out the working condition of load ratio bridging switch for handling voltage, the current signal data of measurement
It identifies and judges, and stored as the result is shown with data, parameter setting and control are carried out to test process.
The DC power supplier includes communication unit, current control unit, controllable current unit and power supply, described
Communication unit connects current control unit and processing module, realizes the communication between current control unit and processing module, receives
Current setting value, the current control unit connect controllable current unit, control controllable current unit according to current setting value,
It issues and provides required electric energy with the consistent DC current of current setting value, the power supply for DC power supplier.
The measurement module includes voltage signal conditioning unit, current signal conditioning unit, measurement processing unit, communication
Unit and power supply, voltage signal conditioning unit, current signal conditioning unit, communication unit and power supply connect with measurement processing unit
It connects.Voltage signal conditioning unit filtered voltage signal, is amplified and is converted to the acceptable signal of measurement processing unit, electric current letter
Number conditioning unit filtered current signal, is amplified and is converted to the acceptable signal of measurement processing unit, measurement processing unit into
Voltage, current signal are converted to digital signal and are acquired by row analog-to-digital conversion, communication unit realize measurement processing unit with
Communication, upload acquisition data between processing module, power supply provide required electric energy for measurement module.
The processing module includes analysis and processing unit, input unit, display unit, communication unit and power supply, input
Unit, display unit, communication unit and power supply are connect with analysis and processing unit.
Analysis and processing unit is used to realize the calculating and fault identification of tap switch movement relevant parameter, and input unit is used to
Realize parameter setting, test operation, display unit is used to realize test result, and communication unit is used to realize and DC power supplier
With the communication of measurement module, power supply provides required electric energy for processing module.
Display unit is liquid crystal display.Input unit is touch screen, keyboard and mouse.
The fault detection method implemented using above-mentioned double tap-changing windings power transformer load tap changer testers,
It is characterized in that：This method comprises the following steps：
((1)：Test pattern, i.e. service mode or overhaul mode are selected in tester display unit mode setting interface；
The tap for selecting the DC current values of DC power supply output in tester display unit parameter setting interface and currently testing is opened
Close gear；
(2)：Start DC power supplier and measurement module；
(3)：Acquire tap-changing windings voltage V and electric current I, I01,I02；
(4)：Wavelet analysis is carried out to voltage signal, according to wavelet transformation detail coefficients identification switch action moment and each rank
The section duration；
[A, D]=dwt (V, ' db3 ')；
Wherein, dwt is wavelet transform, and A is wavelet transform approximation coefficient, and B is wavelet transform details system
Number, V are voltage signal time sequential value, and db3 is wavelet basis function；
(5)：According to test pattern, voltage, current signal calculate entire tap switch transition resistance value R or two pressure regulation
The respective transition resistance value R of winding tap switch1And R2；
R=V/I；R1=V/I01；R2=V/I02
Wherein, V is tap-changing windings voltage, and I is tap-changing windings total current, I01And I02Respectively first branch DC current
With second branch DC current.
(6)：According to characteristic values such as each phase duration of switch motion and transition resistance values, using matrix distance algorithm into
Row fault type recognition.Specific algorithm is：
Calculate measurement eigenmatrix XmWith N number of typical fault eigenmatrix XtDistance：Di=Dist (Xm,Xt,i)；
Calculate minimum range：D=min (Di)；
If D=Dk, then determine tap switch for kth class failure.
Wherein, i=1,2 ... ..., N；Dist is matrix Euclidean distance；Min is minimum value function.
The application is described in further detail with reference to the accompanying drawing：
Refering to Figure 1, double tap-changing windings power transformer load tap changer testers 100 include：It is used to
Generate the DC power supplier 10 for injecting tap-changing windings DC current signal, the measurement for measuring tap-changing windings voltage, electric current
Module 20 and the processing module 30 for carrying out information processing and detection control.Fig. 1 gives tester 100 and device to be detected
Wiring signal, voltage signal acquisition using direct wiring by the way of, current signal acquisition through DC current transformer access survey
Try instrument.
It please refers to shown in Fig. 2, the DC power supplier includes the current control list controlled output DC current
Member 11 carries out the communication unit 12 of communications reception current setting value with processing module, exports the controllable current source list of DC current
Member 13 and the power supply 14 powered for the DC power supplier.The communication unit 12 passes through RS232 agreement and processing module
It is communicated.
It please refers to shown in Fig. 3, the measurement module includes the voltage signal conditioning unit handled voltage signal V
21, to current signal I, I01And I02The current signal conditioning unit 22 that is handled carries out analog-to-digital conversion to conditioned signal and adopts
Collect, to the communication unit 24 for communicating the measurement processing unit 23 being managed, being communicated with processing module, uploading acquisition data
And the power supply 25 for measurement module power supply.The communication unit 23 is communicated by CAN protocol with processing module.Institute
Stating measurement processing unit 23 and controlling chip is digital signal processor (DSP) and field programmable gate array (FPGA).
Please refer to shown in Fig. 4, the processing module include to measurement module upload data analyzed, parameter calculate, therefore
Barrier is identified and inputted, shown and the analysis and processing unit 31 of communication control, for realizing parameter setting, test operation
Input unit 32, for carrying out display unit 33 as the result is shown, for being communicated with DC power supplier and measurement module
Communication unit 34 and for the processing module power supply power supply 35.The communication unit 34 passes through RS232 agreement and direct current
Power module is communicated by CAN protocol with measurement module.The input unit 32 is touch screen, keyboard and mouse.It is described
Display unit 33 is liquid crystal display.It is risc microcontroller (ARM chip) or x86 that the analysis and processing unit 31, which controls chip,
Processor.
When using double tap-changing windings power transformer load tap changer testers 100 of the present invention, join first
The current output line that DC power supplier 10 is connected is connected to shown position according to Fig. 1, is secondly connected measurement module 20
Voltage measurement line and DC current sensor are connected to shown position, carry out parameter again by the input unit 32 of processing module 30
Setting and test operation, finally obtain test result from the display module 33 of processing module 30.Compared to the prior art, this hair
Bright double tap-changing windings power transformer load tap changer testers 100 can have load point to containing double tap-changing windings
Connect switch carry out fault detection, for power transformer load tap changer maintenance convenience is provided, for troubleshooting provide reference according to
According to.
The present invention also provides a kind of corresponding double tap-changing windings power transformer load tap changer fault detection methods, roots
Method can carry out fault detection to double tap-changing windings power transformer load tap changers accordingly, be conducive to staff's progress
Maintenance and maintenance.
Claims (5)
1. the fault detection method implemented using double tap-changing windings power transformer load tap changer testers, feature are existed
In：The detection method is implemented by following tester, which includes：DC power supplier, measurement module and processing module；Directly
Galvanic electricity source module connects processing module with measurement module；
The processing module includes analysis and processing unit, input unit, display unit, communication unit and power supply, input unit,
Display unit, communication unit and power supply are connect with analysis and processing unit；
The detection method includes the following steps：
(1)：Test pattern, i.e. service mode or overhaul mode are selected in tester display unit mode setting interface；It is surveying
The DC current values of selection DC power supply output and the tap switch shelves currently tested in examination instrument display unit parameter setting interface
Position；
(2)：Start DC power supplier and measurement module；
(3)：Acquire tap-changing windings voltage V and electric current I, I01,I02；
(4)：Wavelet analysis is carried out to voltage signal, is held according to wavelet transformation detail coefficients identification switch action moment and each stage
The continuous time；
[A, D]=dwt (V, ' db3 ')；
Wherein, dwt is wavelet transform, and A is wavelet transform approximation coefficient, and D is wavelet transform detail coefficients, V
For voltage signal time sequential value, db3 is wavelet basis function；
(5)：The transition resistance value R or two tap-changing windings of entire tap switch are calculated according to test pattern, voltage, current signal
The respective transition resistance value R of tap switch1And R2；
R=V/I；R1=V/I01；R2=V/I02
Wherein, V is tap-changing windings voltage, and I is tap-changing windings total current, I01And I02Respectively first branch DC current and second
Branch DC current；
(6)：According to each phase duration of switch motion and transition resistance value characteristic value, failure is carried out using matrix distance algorithm
Type identification；Specific algorithm is：
Calculate measurement eigenmatrix XmWith N number of typical fault eigenmatrix XtDistance：Di=Dist (Xm,Xt,i)；
Calculate minimum range：D=min (Di)；
If D=Dk, then determine tap switch for kth class failure；
Wherein, i=1,2 ... ..., N；Dist is matrix Euclidean distance；Min is minimum value function.
2. fault detection method according to claim 1, it is characterised in that：DC power supplier includes communication unit, electric current
Control unit, controllable current unit and power supply, the communication unit connection current control unit and processing module, realize electric current
Communication between control unit and processing module, current control unit connect controllable current unit, and power supply is DC power supplier
Electric energy needed for providing.
3. fault detection method according to claim 1, it is characterised in that：The measurement module includes voltage signal conditioning
Unit, current signal conditioning unit, measurement processing unit, communication unit and power supply, voltage signal conditioning unit, current signal tune
Reason unit, communication unit and power supply are connect with measurement processing unit.
4. fault detection method according to claim 1, it is characterised in that：The display unit is liquid crystal display.
5. fault detection method according to claim 1, it is characterised in that：The input unit is touch screen, keyboard and mouse
Mark.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510747288.3A CN105334456B (en) | 2015-11-06 | 2015-11-06 | Double tap-changing windings power transformer load tap changer testers and fault detection method |
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| CN201510747288.3A CN105334456B (en) | 2015-11-06 | 2015-11-06 | Double tap-changing windings power transformer load tap changer testers and fault detection method |
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| CN105334456A CN105334456A (en) | 2016-02-17 |
| CN105334456B true CN105334456B (en) | 2018-11-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759200B (en) * | 2016-02-18 | 2019-03-15 | 中国农业大学 | A kind of load ratio bridging switch working condition on-line monitoring and method for early warning |
| CN107085183A (en) * | 2017-04-27 | 2017-08-22 | 中国南方电网有限责任公司 | A kind of breaker anomalous discrimination method based on wavelet package transforms and normal distribution law |
| CN107228913B (en) * | 2017-06-09 | 2023-08-08 | 广西电网有限责任公司电力科学研究院 | State diagnosis system for fault type of transformer |
| CN109900465B (en) * | 2019-03-12 | 2020-07-28 | 西安交通大学 | On-load tap-changer fault diagnosis method based on sound signals |
| CN114089183A (en) * | 2021-11-29 | 2022-02-25 | 国网冀北电力有限公司承德供电公司 | Fault detection method and fault detection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2279615Y (en) * | 1996-09-13 | 1998-04-22 | 张正平 | Comprehensive testing instrument for on-load tap changer of power transformer |
| DE102006061601A1 (en) * | 2006-12-27 | 2008-04-24 | Areva Energietechnik Gmbh | Transition contacts burn up determining method for electrical on-load tap changer of step transformer, involves computing actual burn-up of transition contacts depending on current flowing over transition contacts |
| CN103364754A (en) * | 2013-07-16 | 2013-10-23 | 杭州西湖电子研究所 | Method for automatically measuring direct-current resistor, short-circuit impedance, on-load switch and non-load voltage ratio of transformer |
| CN103884915A (en) * | 2014-02-27 | 2014-06-25 | 国家电网公司 | Device and method for automatically measuring direct-current resistance of windings of power transformers |
-
2015
- 2015-11-06 CN CN201510747288.3A patent/CN105334456B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2279615Y (en) * | 1996-09-13 | 1998-04-22 | 张正平 | Comprehensive testing instrument for on-load tap changer of power transformer |
| DE102006061601A1 (en) * | 2006-12-27 | 2008-04-24 | Areva Energietechnik Gmbh | Transition contacts burn up determining method for electrical on-load tap changer of step transformer, involves computing actual burn-up of transition contacts depending on current flowing over transition contacts |
| CN103364754A (en) * | 2013-07-16 | 2013-10-23 | 杭州西湖电子研究所 | Method for automatically measuring direct-current resistor, short-circuit impedance, on-load switch and non-load voltage ratio of transformer |
| CN103884915A (en) * | 2014-02-27 | 2014-06-25 | 国家电网公司 | Device and method for automatically measuring direct-current resistance of windings of power transformers |
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