CN107356869A - A kind of on-load tap-changer of transformer fault diagnosis system - Google Patents
A kind of on-load tap-changer of transformer fault diagnosis system Download PDFInfo
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- CN107356869A CN107356869A CN201710642703.8A CN201710642703A CN107356869A CN 107356869 A CN107356869 A CN 107356869A CN 201710642703 A CN201710642703 A CN 201710642703A CN 107356869 A CN107356869 A CN 107356869A
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 19
- 238000004458 analytical method Methods 0.000 claims abstract description 39
- 230000001133 acceleration Effects 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 7
- 230000005284 excitation Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000010358 mechanical oscillation Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 206010020718 hyperplasia Diseases 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
This application discloses a kind of on-load tap-changer of transformer fault diagnosis system, the system includes：Acceleration transducer, acceleration transducer are arranged on the casing of transformer, for detecting the vibration signal in on-load voltage regulating switch action process；Current sensor, the signal detection end of current sensor is stuck on any phase power line of the motor of driving on-load voltage regulating switch action, for detecting the current signal of motor；Interference signal filtering module, interference signal filtering module is connected respectively with current sensor and acceleration transducer, for filtering interference signal；Main frame, main frame include envelope detection module, analysis module and display module；Envelope detection module and analysis module are connected with interference signal filtering module respectively, envelope detection module and analysis module are connected with display module respectively, the application is by the way that the vibration signal after filtering and current signal input envelope detection module and analysis module are analyzed, with the failure of accurate judgement on-load voltage regulating switch.
Description
Technical field
The application is related to transformer technology field, more particularly to a kind of on-load tap-changer of transformer fault diagnosis system.
Background technology
Handover operation of on-load tap-changer of transformer (abbreviation OLTC) includes a series of action event, such as spring
Load accumulation of energy, selecting switch action, change-over switch switching, switch contact collision etc..These action events include abundant machine
Tool vibration information, and need to meet that certain sequential just can guarantee that the normal switching action of OLTC.Mechanical oscillation signal passes to transformation
Vibration on device shell is the response of internal a variety of exciting phenomenas, these excitations include tap changer handover operation, electric power or
Electrostatic force, shelf depreciation and other operations etc..Therefore, cause to carry interference signal in mechanical oscillation signal, when adopting
Caused by the mechanical oscillation signal analysis OLTC operations during status information of each action event, cause on-load voltage regulating switch failure
(such as switch switches asynchronous, brake fade, switch slide piece, lack of lubrication or bite) judges inaccurate.
The content of the invention
The embodiment of the present application provides a kind of on-load tap-changer of transformer fault diagnosis system, for solving in the prior art
Can not Accurate Analysis on-load tap-changer of transformer operation caused by each action event status information, cause on-load voltage regulating switch
The problem of breakdown judge inaccuracy.
The embodiment of the present application uses following technical proposals：
This application provides a kind of on-load tap-changer of transformer fault diagnosis system, the system includes：
Acceleration transducer, the acceleration transducer are arranged on the casing of transformer, are opened for detecting on-load voltage regulation
Close the vibration signal in action process；
Current sensor, the signal detection end of the current sensor are stuck in the driving electricity of driving on-load voltage regulating switch action
On any phase power line of machine, for detecting the current signal of the motor；
Interference signal filtering module, the interference signal filtering module and the current sensor and the acceleration sensing
Device connects respectively, for filtering interference signal；
Main frame, the main frame include envelope detection module, analysis module and display module；The envelope detection module and institute
Analysis module is stated to be connected with the interference signal filtering module respectively, the envelope detection module and the analysis module respectively with
The display module connection.
Further, the analysis module includes：
Energy spectrometer unit, for identifying and analyzing the frequency of low-and high-frequency energy；
Similarity analysis unit, for the collection of illustrative plates measured twice to be carried out into similarity analysis and calculates coincidence angle value；
Statement analysis unit, for calculating the parameter of collection of illustrative plates and generating form.
Further, the system also includes：
Energy-storage battery, the energy-storage battery are located on the main frame, and the energy-storage battery filters with the interference signal
Module, the envelope detection module, the analysis module connect with the display module.
Further, the system also includes：
Portable casing, the portable casing are provided with the interference signal filtering module and the main frame.
Further, the system also includes：
Base, the base are connected with the acceleration transducer, and are connected with the casing of the transformer.
Further, the base is located on the casing of the transformer perpendicular with on-load voltage regulating switch；
The casing of the base and the transformer is detachably connected.
Further, the current sensor is jaw type current sensor, and the clamp of the jaw type current sensor is stuck in
On any phase power line of the motor；
Wherein, the motor is monophase machine or three phase electric machine.
Further, the quantity of the current sensor is one, and the quantity of the acceleration transducer is three；Accordingly
,
The main frame be provided with current channels consistent with the current sensor quantity and with the acceleration transducer
The consistent acceleration channel of quantity.
Further, the measurement range of the current sensor is 0.1~24A or 0.5~240A, accordingly, output electricity
It is respectively 100mV/A or 10mV/A to flow voltage ratio；
The frequency range of the current sensor is 40~40kHz.
Further, the sensitivity of the acceleration transducer is 100mV/g, and measurement range is +/- 50g, frequency range
For 1~20kHz, excitation voltage is 18~30VDC, and exciting current is 2~20mA.
Above-mentioned at least one technical scheme that the embodiment of the present application uses can reach following beneficial effect：
The embodiment of the present application is by setting interference signal filtering module, by interference signal filtering module and acceleration transducer
Connect with current sensor, believed with the electric current of the vibration signal of filtered acceleration sensor detection and current sensor detection respectively
The interference signal carried in number；Again by the way that the vibration signal after filtering and current signal are inputted into envelope detection module and analysis mould
Block is analyzed, with the failure of accurate judgement on-load voltage regulating switch.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, forms the part of the application, this Shen
Schematic description and description please is used to explain the application, does not form the improper restriction to the application.In the accompanying drawings：
A kind of on-load tap-changer of transformer fault diagnosis system that Fig. 1 provides for the embodiment of the present application realizes that structure is shown
It is intended to；
Fig. 2 is vibration signal and electricity in a kind of on-load tap-changer of transformer fault diagnosis system that application embodiment provides
Flow the collection of illustrative plates of signal；
Fig. 3 is vibration signal and electricity in a kind of on-load tap-changer of transformer fault diagnosis system that application embodiment provides
Flow the envelope of signal；
Fig. 4 is that a kind of on-load tap-changer of transformer fault diagnosis system that the embodiment of the present application provides detects on-load voltage regulation
Energy spectrum during switch regular event；
Fig. 5 is that a kind of on-load tap-changer of transformer fault diagnosis system center base connection that the embodiment of the present application provides adds
Velocity sensor and casing realize structural representation.
Embodiment
To make the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described corresponding accompanying drawing.Obviously, described embodiment is only the application one
Section Example, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Go out under the premise of creative work the every other embodiment obtained, belong to the scope of the application protection.
A kind of on-load tap-changer of transformer fault diagnosis system that Fig. 1 provides for the embodiment of the present application realizes that structure is shown
It is intended to.The on-load tap-changer of transformer fault diagnosis system that the embodiment of the present application provides is applied to 35kV~500kV voltages etc.
The all types on-load voltage regulating switch fault diagnosis of level.As shown in figure 1, the system 100 includes：Acceleration transducer 10, electric current
Sensor 20, interference signal filtering module 30 and main frame 40.Individually below to acceleration transducer 10, current sensor 20, dry
Disturb the work relationship between signal filtering module 30 and main frame 40 and annexation is described, it is specific as follows:
Acceleration transducer 10 is arranged on the casing 11 of transformer 1, for detecting in on-load voltage regulating switch action process
Vibration signal (as shown in Figure 2).The vibration signal is the response as caused by a variety of excitations in the inside of 1 casing of transformer 11, these
Excitation can include on-load voltage regulating switch handover operation, electric power or electrostatic force, shelf depreciation and other operation etc..
When it is implemented, it can be 100mV/g that the acceleration transducer 10, which can use sensitivity, measurement range can be +/- 50g,
Frequency range can be 1~20kHz, and excitation voltage can be 18~30VDC, and exciting current can be 2~20mA acceleration
Sensor 10.
Current sensor 20 uses Hall Coil Detector principle, and the signal detection end of current sensor 20, which is stuck in driving, load
On any phase power line of the motor 12 of tap changer action, for detecting the current signal of motor 12 (such as Fig. 2 institutes
Show).Due to the influence of harmonic wave and electromagnetic radiation to network system 100, make to carry interference signal in the current signal.The electric current passes
Sensor 20 can be jaw type current sensor 20, and the clamp of the jaw type current sensor 20 is stuck in any phase electricity of motor 12
On the line of source.If the motor 12 is monophase machine, the clamp of the jaw type current sensor 20 is stuck in the single-phase of monophase machine
On power line；If the motor 12 is three phase electric machine, the clamp of the jaw type current sensor 20 is stuck in the three of three phase electric machine
In any phase of phase power line.In the specific implementation, the current sensor 20 can use measurement range can for 0.1~
24A or 0.5~240A, accordingly, output current voltage ratio can be respectively 100mV/A or 10mV/A.Current sensor 20
Frequency range can be 40~40kHz.
Interference signal filtering module 30 is connected respectively with current sensor 20 and acceleration transducer 10, is disturbed for filtering
Signal.The interference signal filtering module 30 can use the electric appliance unit that can realize signal filtration function in the prior art, example
Such as, interference signal filtering circuit or interference signal filter.
The main frame 40, which can use resolution ratio, to be more than 16bit, and precision can be +/- 1mV, signal to noise ratio can be-
103dB, the voltage range of current channel can be +/- 10V, and the acceleration-type of acceleration passage can be ICP (IEPE), adopt
Sample rate can be 100kHz, and the sampling time can be 10 μ s main frame 40.The main frame 40 can include envelope detection module 41, divide
Analyse module 42 and display module 43.Envelope detection module 41 and analysis module 42 are connected with interference signal filtering module 30 respectively,
Envelope detection module 41 and analysis module 42 are connected with display module 43 respectively.Wherein, envelope detection module 41 is used for one section
The peak point line of the high-frequency signal (such as vibration signal and current signal) of time span, to obtain envelope (above i.e. (just
) line and lower section (negative) line, this two lines is envelope).Envelope is used to reflect that high frequency signal amplitude becomes
The curve of change.As shown in figure 3, when envelope detection module 41 is to vibration signal collection of illustrative plates envelope after filtering, high frequency is produced respectively
Envelope a and lower-frequency envelope line b, by carrying out low-and high-frequency superposition to envelope, registration is calculated, odd even gear is analyzed, longitudinal direction
Trend analysis, the collection of illustrative plates that can be formed to vibration signal and current signal carries out appropriate analysis, so as to which accurate judgement has load to adjust
Compress switch the failures such as asynchronous switching, brake fade, switch slide piece, lack of lubrication or bite.
When occurring due to the on-load voltage regulating switch failure of transformer 1, it will usually cause vibration signal frequency to change, mainly
Cash as the new frequency content of hyperplasia and the growth of original frequency amplitude so that the collection of illustrative plates that vibration signal and current signal are formed occurs
Change.Therefore, in the present embodiment, the analysis module 42 by analyze collection of illustrative plates parameter and on-load voltage regulating switch switching when
Entrained energy, to judge the failure of on-load voltage regulating switch.When it is implemented, the analysis module 42 can include energy spectrometer
Unit, similarity analysis unit and statement analysis unit.
Wherein, energy spectrometer unit is used to identify and analyze the frequency of low-and high-frequency energy.Fig. 4 is that on-load voltage regulating switch is normal
Energy spectrum during action.The energy of on-load voltage regulating switch normal operation is concentrated mainly on low frequency energy, high frequency as can be seen from Figure 4
Energy is less shared by energy.In general, during on-load voltage regulating switch normal operation, low frequency energy accounts for gross energy more than 70%, and
High-frequency energy accounts for gross energy below 30%.Similarity analysis unit by by the collection of illustrative plates measured twice carry out similarity analysis and based on
Calculate and overlap angle value.Statement analysis unit is used to calculate the parameter of collection of illustrative plates and generates form.Parameter in the form can include electricity
Flow maximum, current average, electric current shake degree, time delay, braking time, vibration low frequency maximum, vibration high frequency maximum
Value, vibration signal registration etc..Operating personnel can be with the parameter in analytical statement, the convenient running status to on-load voltage regulating switch
Evaluation is made, is provided convenience for the accident analysis of on-load voltage regulating switch.
Further, the on-load voltage regulating switch fault diagnosis system 100 of transformer 1 described in above-described embodiment can also wrap
Include：Energy-storage battery 50.Energy-storage battery 50 is located on main frame 40, and energy-storage battery 50 is examined with interference signal filtering module 30, envelope
Ripple module 41, analysis module 42 and display module 43 connect.The cruising time of the energy-storage battery 50 is at least 5 hours.This Shen
Please be in embodiment by setting energy-storage battery 50, it can be ensured that in the case of without external power supply, it is ensured that the on-load voltage regulation of transformer 1
The normal power supply of switch fault diagnostic system 100, it ensure that the normal of the on-load voltage regulating switch fault diagnosis system 100 of transformer 1
Work, practicality are stronger.
Further, the on-load voltage regulating switch fault diagnosis system 100 of transformer 1 described in above-described embodiment can also wrap
Include：Portable casing 44.Portable casing 44 is provided with interference signal filtering module 30 and main frame 40.The portable casing 44
Size meets the portable size of operating personnel.Therefore, the embodiment of the present application, can be with easy to operation by setting portable casing 44
Personnel carry, and simple in construction, practicality is stronger.
Further, as shown in figure 5, the on-load voltage regulating switch fault diagnosis system of transformer 1 described in above-described embodiment
100 can also include：Base 60.Base 60 is connected with acceleration transducer 10, and is connected with the casing 11 of transformer 1.The bottom
Seat 60 is used for the casing 11 that acceleration transducer 10 is fixed on to transformer 1.Detected for the ease of acceleration transducer 10
The higher vibration signal of intensity, it is preferred that base 60 is located on the casing 11 of the transformer 1 perpendicular with on-load voltage regulating switch.
Replaced for the ease of acceleration transducer 10 or be easy to repair, it is preferred that the casing 11 of base 60 and transformer 1 detachably connects
Connect.
Further, the quantity of the current sensor 20 described in above-described embodiment is one, acceleration transducer 10
Quantity is three；Accordingly, main frame 40 is provided with the current channels and and acceleration sensing consistent with the quantity of current sensor 20
The consistent acceleration channel of the quantity of device 10, it is easy to the electricity of motor of the comprehensive acquisition on-load voltage regulating switch when switching gear
The vibration signal of signal and on-load voltage regulating switch is flowed, comprehensive signal Analysis is provided for the breakdown judge of on-load voltage regulating switch,
So that analysis result is more accurate.
Embodiments herein is these are only, is not limited to the application.To those skilled in the art,
The application can have various modifications and variations.All any modifications made within spirit herein and principle, equivalent substitution,
Improve etc., it should be included within the scope of claims hereof.
Claims (10)
- A kind of 1. on-load tap-changer of transformer fault diagnosis system, it is characterised in that including：Acceleration transducer, the acceleration transducer are arranged on the casing of transformer, are moved for detecting on-load voltage regulating switch Vibration signal during work；Current sensor, the signal detection end of the current sensor are stuck in the motor of driving on-load voltage regulating switch action On any phase power line, the current signal of the motor for detecting transformer；Interference signal filtering module, the interference signal filtering module and the current sensor and the acceleration transducer point Do not connect, for filtering interference signal；Main frame, the main frame include envelope detection module, analysis module and display module；The envelope detection module and described point Analysis module is connected with the interference signal filtering module respectively, the envelope detection module and the analysis module respectively with it is described Display module connects.
- 2. system according to claim 1, it is characterised in that the analysis module includes：Energy spectrometer unit, for identifying and analyzing the frequency of low-and high-frequency energy；Similarity analysis unit, for the collection of illustrative plates measured twice to be carried out into similarity analysis and calculates coincidence angle value；Statement analysis unit, for calculating the parameter of collection of illustrative plates and generating form.
- 3. system according to claim 1, it is characterised in that the system also includes：Energy-storage battery, the energy-storage battery are located on the main frame, and the energy-storage battery and the interference signal filtering module, The envelope detection module, the analysis module connect with the display module.
- 4. system according to claim 3, it is characterised in that the system also includes：Portable casing, the portable casing are provided with the interference signal filtering module and the main frame.
- 5. system according to claim 1, it is characterised in that the system also includes：Base, the base are connected with the acceleration transducer, and are connected with the casing of the transformer.
- 6. system according to claim 5, it is characterised in that the base is located at the institute perpendicular with on-load voltage regulating switch State on the casing of transformer；The casing of the base and the transformer is detachably connected.
- 7. system according to claim 1, it is characterised in that the current sensor is jaw type current sensor, described The clamp of jaw type current sensor is stuck on any phase power line of the motor；Wherein, the motor is monophase machine or three phase electric machine.
- 8. system according to claim 1, it is characterised in that the quantity of the current sensor is one, the acceleration The quantity for spending sensor is three；Accordingly,The main frame be provided with current channels consistent with the current sensor quantity and with the acceleration transducer quantity Consistent acceleration channel.
- 9. system according to claim 1, it is characterised in thatThe measurement range of the current sensor is 0.1~24A or 0.5~240A, and accordingly, output current voltage ratio is respectively 100mV/A or 10mV/A；The frequency range of the current sensor is 40~40kHz.
- 10. system according to claim 1, it is characterised in thatThe sensitivity of the acceleration transducer is 100mV/g, and measurement range is +/- 50g, and frequency range is 1~20kHz, is encouraged Magnetoelectricity pressure is 18~30VDC, and exciting current is 2~20mA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710642703.8A CN107356869A (en) | 2017-07-31 | 2017-07-31 | A kind of on-load tap-changer of transformer fault diagnosis system |
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| CN201710642703.8A CN107356869A (en) | 2017-07-31 | 2017-07-31 | A kind of on-load tap-changer of transformer fault diagnosis system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907320A (en) * | 2017-12-01 | 2018-04-13 | 国网重庆市电力公司电力科学研究院 | The diagnostic method and device of the machine performance feature of on-load tap changers of transformers |
| CN108427040A (en) * | 2017-12-11 | 2018-08-21 | 海南电网有限责任公司琼海供电局 | For the lightning detection method and device of power supply area |
| WO2019170554A1 (en) * | 2018-03-06 | 2019-09-12 | Maschinenfabrik Reinhausen Gmbh | System, method and computer programme product for detecting physical variables of at least one component of a tap-changing transformer and for monitoring the components of a tap-changing transformer |
| CN111948528A (en) * | 2019-05-16 | 2020-11-17 | 株式会社日立制作所 | Diagnostic method and device for opening and closing device |
| CN113390591A (en) * | 2021-05-31 | 2021-09-14 | 广西电网有限责任公司电力科学研究院 | On-load tap-changer mechanical vibration detection system and method based on 5G network |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907320A (en) * | 2017-12-01 | 2018-04-13 | 国网重庆市电力公司电力科学研究院 | The diagnostic method and device of the machine performance feature of on-load tap changers of transformers |
| CN108427040A (en) * | 2017-12-11 | 2018-08-21 | 海南电网有限责任公司琼海供电局 | For the lightning detection method and device of power supply area |
| WO2019170554A1 (en) * | 2018-03-06 | 2019-09-12 | Maschinenfabrik Reinhausen Gmbh | System, method and computer programme product for detecting physical variables of at least one component of a tap-changing transformer and for monitoring the components of a tap-changing transformer |
| CN111948528A (en) * | 2019-05-16 | 2020-11-17 | 株式会社日立制作所 | Diagnostic method and device for opening and closing device |
| CN111948528B (en) * | 2019-05-16 | 2023-04-18 | 株式会社日立制作所 | Diagnostic method and device for opening and closing device |
| CN113390591A (en) * | 2021-05-31 | 2021-09-14 | 广西电网有限责任公司电力科学研究院 | On-load tap-changer mechanical vibration detection system and method based on 5G network |
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Application publication date: 20171117 |