CN109029582A - A kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition - Google Patents
A kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition Download PDFInfo
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention provides a kind of Power Transformer Faults on-line detecting systems based on many kinds of parameters acquisition, and the transformer fault on-line detecting system includes transformer, signal acquisition module, signal processing conversion module, signal DCM diagnostic control module and alarm module；The transformer fault on-line detecting system acquires electric current, voltage, temperature, humidity and the operation sound of the transformer by the signal acquisition module, it is handled using the signal processing conversion module and transports to the signal DCM diagnostic control module, judge whether the variable-pressure operation state is normal by analysis, and storage is carried out to operation information and is shown, for failure then by the alarm module alert, the signal DCM diagnostic control module controls whether the transformer works on if it exists.The present invention provides a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition, can be realized, in real time detection more accurate to Operation Condition of Power Transformers.
Description
Technical field
The invention belongs to electric device maintenance technical field, in particular to a kind of power transformer based on many kinds of parameters acquisition
Device line detection system for failure.
Background technique
Transformer is one of capital equipment of electric system, its operation conditions will be directly related to the safety of electric system
Economical operation.The failure of large-scale power transformer is mainly shown as shelf depreciation based on insulation fault.Transformer fault detection
Technology refers to through monitoring running state of transformer and whether detects converting station electric power transformer still in normal work, if
It breaks down, can accomplish and alarm, facilitate staff to carry out Measuring error to it, to prevent major accident, together
When can also predict working condition in transformer following a period of time.Traditional transformer fault detection method is all by people
What work was completed, including repair based on condition of component, periodic inspection etc., these methods are required to relevant staff and periodically grasp at the scene
To make, technical level and working experience to staff all require, but traditional detection method not only lacks timeliness, and
And there is certain security risk.It is following with industrial development, scientific and technological progress, continuous improvement of people's living standards
Be power demand increase substantially, power grid scale it is increasing, traditional detection means has been unable to satisfy the demand increasingly changed, this
When, along with the progress of computer and electronic technology, online fault detection technique also grows up therewith in real time.
Whether real-time detection transformer, which occurs shelf depreciation, can effectively reflect the insulation status of transformer, and then send out in time
The insulation defect of existing inside transformer, convenient for safeguarding and maintenance.During shelf depreciation, invariably accompany transformer sound
It generates, the degree and type of these sound and shelf depreciation have certain corresponding relationship.Staff can be with when normal operation
By the operation sound for the transformer heard, judge whether transformer has occurred failure.How human auditory system root is simulated
Judge running state of transformer and then to detect whether to break down according to sound, in conjunction with traditional transformer fault detection method,
It can be realized, in real time detection more accurate to running state of transformer.
Summary of the invention
The present invention provides a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition, can be realized pair
Operation Condition of Power Transformers is more accurate, detection in real time, finds the insulation defect of inside transformer in time, it is convenient for safeguarding and
Maintenance.
The present invention is specially a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition, the transformation
Device line detection system for failure include transformer, signal acquisition module, signal processing conversion module, signal DCM diagnostic control module and
Alarm module, the transformer, the signal acquisition module, the signal processing conversion module, the signal diagnosis control mould
Block and the alarm module are linked in sequence, and the signal DCM diagnostic control module is also connect with the transformer；The transformer event
Barrier on-line detecting system acquires electric current, voltage, temperature, humidity and the operation sound of the transformer by the signal acquisition module
Sound carries out processing and transports to the signal with digital signal to diagnose using signal of the signal processing conversion module to acquisition
Control module judges whether the variable-pressure operation state is normal by analysis, and carries out storage to operation information and show, if it exists
For failure then by the alarm module alert, the signal DCM diagnostic control module controls whether the transformer continues
Work, and then prevent the transformer fault operation from causing other accident.
The signal acquisition module includes current transformer, voltage transformer, temperature sensor, humidity sensor and sound
Sensor acquires electric current, voltage, temperature, humidity and the operation voice signal of the transformer respectively.
The signal processing conversion module carries out the electric current of input, voltage, temperature, humidity and operation voice signal
Processing, and it is converted into corresponding digital signal output.
The signal processing conversion module include Sound Processor Unit, using single-chip microcontroller to the operation voice signal at
Reason, processing method are as follows:
Step 1: the operation voice signal is divided into multiple approximate stable voiced frames in short-term, then windowing process is carried out,
The operation voice signal is expressed as x after carrying out framing windowing processω(n)=x (n) * ω (n), the x (n) are the operation
Voice signal, the ω (n) are window function, are expressed as
Step 2: carrying out Short Time Fourier Transform to the voiced frame in short-term, amplitude-frequency characteristic, the Fourier transformation are obtained
Function is
Step 3: the frequency after the Fourier transformation of voiced frame in short-term is divided into L by block according to the amplitude-frequency characteristic
A sub-band；
Step 4: energy corresponding to each frequency point in the sub-band is added, each sub-band energy E is acquiredi
With the energy and E of all sub-bandsj, and the characteristic parameter as representing said sound, and then obtain representing said sound
One group of proper phasor (E of signal1,E2…Ei,Ej)；Dimension-reduction treatment is carried out to described eigenvector, finally obtains and represents the sound
The special data of sound signal.
The signal DCM diagnostic control module includes central processing unit, audio database, memory module, display module and key
Input module, the central processing unit respectively with the audio database, the memory module, the display module, institute
Keyboard input module is stated to be connected with the transformer；The keyboard input module shares six press keys, respectively acknowledgement key, take
Disappear delete key, upturning key, downturning key, key is turned on a left side, key is turned on the right side, the upturning key and the downturning key can also realize parameter setting
When add-minus function；The keyboard input module and the central processing unit, the memory module, the display module are jointly complete
The setting of each operating parameter protection value when being operated normally at the transformer, so as to the central processing unit to the information of input into
Row comparative analysis；The keyboard input module can also realize historical data in conjunction with the memory module and the display module
Consult the access with historical failure data.
The central processing unit joins the electric current of input, voltage, temperature and humidity signal and the normal operation of setting
Number compares and analyzes, and the information in the special data of the operation voice signal of input and the audio database is compared
Analysis, and then judge the operating status of the transformer, and information storage is carried out by the memory module, by the display module
It displays data, if it exists failure, which kind of failure the central processing unit is judged as and judges whether the transformer can be with
It works on, alarm signal is issued by the alarm module, the working condition of the transformer is controlled by relay.
The audio database is the acoustic feature for the transformer working condition established on the basis of testing at the scene
Database, acoustic feature data when including transformer normal work and different faults occur.
The alarm module uses combined aural and visual alarm.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition of the present invention
Figure.
Specific embodiment
The Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition a kind of to the present invention with reference to the accompanying drawing
Specific embodiment elaborate.
As shown in Figure 1, the transformer fault on-line detecting system of the invention include transformer, signal acquisition module,
Signal processing conversion module, signal DCM diagnostic control module and alarm module, it is the transformer, the signal acquisition module, described
Signal processing conversion module, the signal DCM diagnostic control module and the alarm module are linked in sequence, the signal diagnosis control
Module is also connect with the transformer；The transformer fault on-line detecting system passes through described in signal acquisition module acquisition
Electric current, voltage, temperature, humidity and the operation sound of transformer, using the signal processing conversion module to the signal of acquisition
Handle and the signal DCM diagnostic control module is transported to digital signal, whether judges the variable-pressure operation state by analysis
Normally, it and carries out storage to operation information to show, failure then passes through the alarm module alert, the letter if it exists
Number DCM diagnostic control module controls whether the transformer works on, and then prevents the transformer fault operation from causing other things
Therefore occur.
The signal acquisition module includes current transformer, voltage transformer, temperature sensor, humidity sensor and sound
Sensor acquires electric current, voltage, temperature, humidity and the operation voice signal of the transformer respectively.
The signal processing conversion module carries out the electric current of input, voltage, temperature, humidity and operation voice signal
Processing, and it is converted into corresponding digital signal output.
The signal processing conversion module include Sound Processor Unit, using single-chip microcontroller to the operation voice signal at
Reason, processing method are as follows:
Step 1: the operation voice signal is divided into multiple approximate stable voiced frames in short-term, then windowing process is carried out,
The operation voice signal is expressed as x after carrying out framing windowing processω(n)=x (n) * ω (n), the x (n) are the operation
Voice signal, the ω (n) are window function, are expressed as
Step 2: carrying out Short Time Fourier Transform to the voiced frame in short-term, amplitude-frequency characteristic, the Fourier transformation are obtained
Function is
Step 3: the frequency after the Fourier transformation of voiced frame in short-term is divided into L by block according to the amplitude-frequency characteristic
A sub-band；
Step 4: energy corresponding to each frequency point in the sub-band is added, each sub-band energy E is acquiredi
With the energy and E of all sub-bandsj, and the characteristic parameter as representing said sound, and then obtain representing said sound
One group of proper phasor (E of signal1,E2…Ei,Ej)；Dimension-reduction treatment is carried out to described eigenvector, finally obtains and represents the sound
The special data of sound signal.
The signal DCM diagnostic control module includes central processing unit, audio database, memory module, display module and key
Input module, the central processing unit respectively with the audio database, the memory module, the display module, institute
Keyboard input module is stated to be connected with the transformer；The keyboard input module shares six press keys, respectively acknowledgement key, take
Disappear delete key, upturning key, downturning key, key is turned on a left side, key is turned on the right side, the upturning key and the downturning key can also realize parameter setting
When add-minus function；The keyboard input module and the central processing unit, the memory module, the display module are jointly complete
The setting of each operating parameter protection value when being operated normally at the transformer, so as to the central processing unit to the information of input into
Row comparative analysis；The keyboard input module can also realize historical data in conjunction with the memory module and the display module
Consult the access with historical failure data.
The central processing unit joins the electric current of input, voltage, temperature and humidity signal and the normal operation of setting
Number compares and analyzes, and the information in the special data of the operation voice signal of input and the audio database is compared
Analysis, and then judge the operating status of the transformer, and information storage is carried out by the memory module, by the display module
It displays data, if it exists failure, which kind of failure the central processing unit is judged as and judges whether the transformer can be with
It works on, alarm signal is issued by the alarm module, the working condition of the transformer is controlled by relay.
The audio database is the acoustic feature for the transformer working condition established on the basis of testing at the scene
Database, acoustic feature data when including transformer normal work and different faults occur.
The alarm module uses combined aural and visual alarm.
Finally it should be noted that only illustrating technical solution of the present invention rather than its limitations in conjunction with above-described embodiment.Institute
The those of ordinary skill in category field is it is to be understood that those skilled in the art can repair a specific embodiment of the invention
Change or equivalent replacement, but these modifications or change are being applied among pending claims.
Claims (8)
1. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition, which is characterized in that the transformer
Line detection system for failure includes transformer, signal acquisition module, signal processing conversion module, signal DCM diagnostic control module and report
Alert module, the transformer, the signal acquisition module, the signal processing conversion module, the signal DCM diagnostic control module
It is successively linked in sequence with the alarm module, the signal DCM diagnostic control module is also connect with the transformer；The transformer
Line detection system for failure acquires electric current, voltage, temperature, humidity and the operation of the transformer by the signal acquisition module
Sound handle and transport to the signal with digital signal examining using signal of the signal processing conversion module to acquisition
Disconnected control module, judges whether the variable-pressure operation state is normal, and carry out storage to operation information and show, if depositing by analysis
In failure then by the alarm module alert, the signal DCM diagnostic control module control the transformer whether after
Continuous work, and then prevent the transformer fault operation from causing other accident.
2. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition according to claim 1,
It is characterized in that, the signal acquisition module includes current transformer, voltage transformer, temperature sensor, humidity sensor harmony
Sound sensor acquires electric current, voltage, temperature, humidity and the operation voice signal of the transformer respectively.
3. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition according to claim 1,
Be characterized in that, the signal processing conversion module to the electric current of input, voltage, temperature, humidity and operation voice signal into
Row processing, and it is converted into corresponding digital signal output.
4. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition according to claim 1 or 3,
It is characterized in that, the signal processing conversion module include Sound Processor Unit, using single-chip microcontroller to the operation voice signal into
Row processing, processing method are as follows:
Step 1: the operation voice signal is divided into multiple approximate stable voiced frames in short-term, then windowing process is carried out, it is described
Operation voice signal is expressed as x after carrying out framing windowing processω(n)=x (n) * ω (n), the x (n) are the operation sound
Signal, the ω (n) are window function, are expressed as
Step 2: carrying out Short Time Fourier Transform to the voiced frame in short-term, amplitude-frequency characteristic, the Fourier transform function are obtained
For
Step 3: the frequency after the Fourier transformation of voiced frame in short-term is divided into L son by block according to the amplitude-frequency characteristic
Frequency band；
Step 4: energy corresponding to each frequency point in the sub-band is added, each sub-band energy E is acquirediWith it is all
The energy and E of the sub-bandj, and the characteristic parameter as representing said sound, and then obtain representing said sound signal
One group of proper phasor (E1,E2…Ei,Ej)；Dimension-reduction treatment is carried out to described eigenvector, finally obtains representing said sound signal
Special data.
5. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition according to claim 1,
Be characterized in that, the signal DCM diagnostic control module include central processing unit, audio database, memory module, display module and by
Key input module, the central processing unit respectively with the audio database, the memory module, the display module,
The keyboard input module is connected with the transformer；The keyboard input module shares six press keys, respectively acknowledgement key,
Unerase key, upturning key, downturning key, key is turned on a left side and key is turned on the right side, the upturning key and the downturning key can also realize parameter
Add-minus function when setting；The keyboard input module and the central processing unit, the memory module, the display module are total
With the setting for completing each operating parameter protection value when the transformer operates normally, so that the central processing unit is to the letter of input
Breath compares and analyzes；The keyboard input module can also realize history number in conjunction with the memory module and the display module
According to access and historical failure data access.
6. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition according to claim 5,
It is characterized in that, the central processing unit joins the electric current of input, voltage, temperature and humidity signal and the normal operation of setting
Number compares and analyzes, and the information in the special data of the operation voice signal of input and the audio database is compared
Analysis, and then judge the operating status of the transformer, and information storage is carried out by the memory module, by the display module
It displays data, if it exists failure, which kind of failure the central processing unit is judged as and judges whether the transformer can be with
It works on, alarm signal is issued by the alarm module, the working condition of the transformer is controlled by relay.
7. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition according to claim 6,
It is characterized in that, the audio database is the acoustic feature for the transformer working condition established on the basis of testing at the scene
Database, acoustic feature data when including transformer normal work and different faults occur.
8. a kind of Power Transformer Faults on-line detecting system based on many kinds of parameters acquisition according to claim 1,
It is characterized in that, the alarm module uses combined aural and visual alarm.
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Cited By (13)
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| CN110531736A (en) * | 2019-08-13 | 2019-12-03 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of high power motor controller failure monitoring circuit and its method |
| CN110595609A (en) * | 2019-09-29 | 2019-12-20 | 国网河南省电力公司南召县供电公司 | Diagnosis device for rapidly judging fault of power transformation equipment through sound abnormity |
| CN110707708A (en) * | 2019-10-16 | 2020-01-17 | 合肥学院 | Virtual synchronous machine control system and method based on power electronic transformer |
| CN110988547A (en) * | 2019-12-17 | 2020-04-10 | 国网江苏省电力有限公司检修分公司 | Power grid phase modulator state monitoring system |
| CN111337773A (en) * | 2020-03-18 | 2020-06-26 | 江苏和光智能电气有限公司 | Transformer fault remote monitoring system and monitoring method |
| CN111336100A (en) * | 2020-04-10 | 2020-06-26 | 中国恩菲工程技术有限公司 | Water pump fault diagnosis system |
| CN112305462A (en) * | 2020-11-09 | 2021-02-02 | 北京中拓新源科技有限公司 | System for recognizing typical faults of transformer based on transformer sound |
| CN112345979A (en) * | 2020-10-29 | 2021-02-09 | 国网江苏省电力有限公司盐城供电分公司 | Transformer fault detection system |
| CN113053412A (en) * | 2021-02-04 | 2021-06-29 | 国网江苏省电力有限公司检修分公司 | Sound-based transformer fault identification method |
| CN113124929A (en) * | 2021-04-13 | 2021-07-16 | 国网陕西省电力公司铜川供电公司 | Transformer substation multi-parameter signal acquisition comprehensive analysis system and method |
| CN114091532A (en) * | 2021-11-14 | 2022-02-25 | 广东电网有限责任公司江门供电局 | Distribution transformer operation sound signal acquisition method based on crowd sensing |
| CN114212496A (en) * | 2021-11-30 | 2022-03-22 | 国网江苏省电力有限公司盐城供电分公司 | Transmission mechanism for transfer transformer |
| CN114325155A (en) * | 2021-11-19 | 2022-04-12 | 国网湖南省电力有限公司 | Fault detection system for transformer |
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| CN110988547A (en) * | 2019-12-17 | 2020-04-10 | 国网江苏省电力有限公司检修分公司 | Power grid phase modulator state monitoring system |
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| CN114091532A (en) * | 2021-11-14 | 2022-02-25 | 广东电网有限责任公司江门供电局 | Distribution transformer operation sound signal acquisition method based on crowd sensing |
| CN114091532B (en) * | 2021-11-14 | 2024-08-23 | 广东电网有限责任公司江门供电局 | Distribution transformer operation sound signal acquisition method based on crowd sensing |
| CN114325155A (en) * | 2021-11-19 | 2022-04-12 | 国网湖南省电力有限公司 | Fault detection system for transformer |
| CN114212496A (en) * | 2021-11-30 | 2022-03-22 | 国网江苏省电力有限公司盐城供电分公司 | Transmission mechanism for transfer transformer |
| CN114212496B (en) * | 2021-11-30 | 2023-08-22 | 国网江苏省电力有限公司盐城供电分公司 | Transmission mechanism for transfer transformer |
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