CN106772044A - A kind of generator windings coil deterioration point diagnostic system - Google Patents
A kind of generator windings coil deterioration point diagnostic system Download PDFInfo
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- CN106772044A CN106772044A CN201611244165.9A CN201611244165A CN106772044A CN 106772044 A CN106772044 A CN 106772044A CN 201611244165 A CN201611244165 A CN 201611244165A CN 106772044 A CN106772044 A CN 106772044A
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- signal
- generator windings
- diagnostic system
- deterioration
- windings coil
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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
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention relates to technical field of electric power, the deterioration point diagnostic system of more particularly to a kind of generator windings coil.The present invention includes：Signal receiving part point, signal processing and result storage part；Wherein signal receiving part point connects signal processing, and signal processing is connected with diagnostic result storage part split-phase.Generator windings coil deterioration point diagnostic system of the invention, the electric discharge defect or failure that can be caused due to insulation degradation with effective detection generator windings coil provides a kind of effective detection means for strick precaution failure betides possible trouble.
Description
Technical field
The present invention relates to technical field of electric power, the deterioration point diagnostic system of more particularly to a kind of generator windings coil.
Background technology
In power system, the shelf depreciation of generator windings coil or spark discharge are that insulating materials is aging, failure is produced
Raw omen.Therefore, in order to find the aging position of insulating materials early, it is to avoid insulation fault is, it is necessary to the position of deterioration point of discharge
Put and effectively searched.
The content of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of deterioration point diagnosis of generator windings coil
System, can be conducive to the early stage detection that generator windings coil insulation is deteriorated, and prevent failure from betiding possible trouble.
For achieving the above object, the present invention is achieved by the following technical solutions：
A kind of deterioration point diagnostic system of generator windings coil, including：Signal receiving part point, signal processing and
Result stores part；Wherein signal receiving part point connects signal processing, and signal processing stores part with diagnostic result
It is connected.
The signal receiving part is divided to including two electromagnetic sensors and two signal amplifiers compositions.
Described two electromagnetic sensors are used to receive the electromagnetic wave signal that deterioration electric discharge is produced；Two electromagnetic sensors
The input by the coaxial cable of equal length respectively with two signal amplifiers is connected respectively.
The electromagnetic sensor constitutes array by two electromagnetic sensors.
The signal processing is used to read the electromagnetic wave signal Wave data, and electricity is calculated using signal phase relation
Direction of the magnetostatic wave signal relative to the signal receiving device.
The signal processing include signal processing apparatus, signal processing apparatus be by analog-digital converter, trigger and
Computer is constituted.
The trigger threshold value of the signal processing apparatus is determined by motor three-phase voltage.
The computer part of the signal processing apparatus mainly by the phase relation between signal, connects according to two sensors
The electromagnetic wave that the deterioration electric discharge for receiving is produced, analyzes the time difference that signal reaches sensor, and then calculate by signal phase
Go out to deteriorate direction of the point of discharge relative to the signal receiving device.
The diagnostic result storage part is mainly used in storing the electromagnetic wave signal relative to the signal receiving device
Direction, the direction diagnostic result for deteriorating point of discharge is stored in computer or data storage device.
A kind of deterioration point diagnostic system of described generator windings coil, comprises the following steps：
S1, receives generator windings coil and deteriorates the electric discharge electromagnetic wave for causing letter respectively by two electromagnetic sensors
Number；
S2, electromagnetic wave signal is transmitted by equal length coaxial cable；
S3, electromagnetic wave signal is transmitted to amplifier by equal length coaxial cable；
Analog-digital converter is set as reception state by S4, trigger according to three-phase voltage given threshold；
S5, converts a signal into data signal；
S6, the data signal that will be transmitted solves time difference and the direction between signal by phase relation：
x1(t)=s (t)+n1(t),
x2(t)=s (t+D)+n2(t),
To receive signal, s is to deteriorate the electromagnetic wave signal that point of discharge is produced to x, and n is noise, and D is the time difference, and t is the time；
The cross-correlation function R between signal is obtained using Fourier transformation12, by after the phase relation for obtaining above formula, i.e.,
Above formula solution is maximized the value for drawing time difference D, outgoing direction is then calculated with the position relationship of deterioration point according to sensor, for example
Following formula：
Wherein, d is the citing between sensor, and θ is that the direction of discharge source, c is the biography of battery ripple relative to sensor group
Defeated speed.
Generator windings coil deterioration point diagnostic system of the invention, can be with effective detection generator windings coil due to exhausted
Electric discharge defect or failure that edge deterioration causes, a kind of effective detection means is provided for strick precaution failure betides possible trouble.
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is further detailed explanation, but is not implemented by the present invention
Example is limited.
Brief description of the drawings
Fig. 1 is generator windings coil of the present invention deterioration point diagnostic system schematic diagram.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 is the generator windings coil deterioration point diagnostic system schematic diagram of an embodiment；As shown in figure 1, a kind of generate electricity
Machine winding coil deterioration point diagnostic system, including：Signal receiving part point, signal processing and result storage part；Wherein
Signal receiving part point connection signal processing, signal processing is connected with diagnostic result storage part split-phase.
The signal receiving part is divided to including two electromagnetic sensors and two signal amplifiers compositions, two of which electromagnetism
Wave sensor is used to receive the electromagnetic wave signal that deterioration electric discharge is produced；Two electromagnetic sensors are respectively by the coaxial of equal length
Input of the cable respectively with two signal amplifiers is connected.The electromagnetic sensor is by two electromagnetic sensor groups
Into array.
The signal processing is used to read the electromagnetic wave signal Wave data, and electricity is calculated using signal phase relation
Direction of the magnetostatic wave signal relative to the signal receiving device.Signal processing includes signal processing apparatus, signal processing device
Put and be made up of analog-digital converter, trigger and computer, mainly completed by calculation procedure in computer.The signal processing device
The trigger threshold value put is determined by motor three-phase voltage.The computer part of the signal processing apparatus is mainly by between signal
Phase relation, the electromagnetic wave that the deterioration electric discharge received according to two sensors is produced, analyzes signal and arrives by signal phase
Up to the time difference of sensor, and then calculate direction of the deterioration point of discharge relative to the signal receiving device.
The diagnostic result storage part is mainly used in storing the electromagnetic wave signal relative to the signal receiving device
Direction, the direction diagnostic result for deteriorating point of discharge is stored in computer or data storage device.
The embodiment that the present invention is provided includes generator windings coil deterioration point diagnostic system embodiment.Carry out individually below
Describe in detail.
The generator windings coil deterioration point diagnostic system of the present embodiment comprises the following steps that details are as follows for each step：
S1, receives generator windings coil and deteriorates the electric discharge electromagnetic wave for causing letter respectively by two electromagnetic sensors
Number；
S2, electromagnetic wave signal is transmitted by equal length coaxial cable；
S3, electromagnetic wave signal is transmitted to amplifier by equal length coaxial cable；
Analog-digital converter is set as reception state by S4, trigger according to three-phase voltage given threshold；
S5, converts a signal into data signal；
S6, the data signal that will be transmitted solves time difference and the direction between signal by phase relation：
x1(t)=s (t)+n1(t),
x2(t)=s (t+D)+n2(t),
To receive signal, s is to deteriorate the electromagnetic wave signal that point of discharge is produced to x, and n is noise, and D is the time difference, and t is the time.
The cross-correlation function R between signal is obtained using Fourier transformation12, by after the phase relation for obtaining above formula, i.e.,
Above formula solution is maximized the value for drawing time difference D, outgoing direction is then calculated with the position relationship of deterioration point according to sensor, for example
Following formula：
Wherein, d is the citing between sensor, and θ is that the direction of discharge source, c is the biography of battery ripple relative to sensor group
Defeated speed.
Claims (10)
1. the deterioration point diagnostic system of a kind of generator windings coil, it is characterised in that including：At signal receiving part point, signal
Reason part and result storage part；Wherein signal receiving part point connects signal processing, and signal processing is tied with diagnosis
Fruit storage part split-phase is connected.
2. a kind of deterioration point diagnostic system of generator windings coil according to claim 1, it is characterised in that the letter
Number receiving portion includes two electromagnetic sensors and two signal amplifiers compositions.
3. the deterioration point diagnostic system of a kind of generator windings coil according to claim 2, it is characterised in that described two
Individual electromagnetic sensor is used to receive the electromagnetic wave signal that deterioration electric discharge is produced；Two electromagnetic sensors pass through equal length respectively
Input of the coaxial cable respectively with two signal amplifiers be connected.
4. a kind of deterioration point diagnostic system of generator windings coil according to claim 2, it is characterised in that the electricity
Magnetic wave sensor constitutes array by two electromagnetic sensors.
5. a kind of deterioration point diagnostic system of generator windings coil according to claim 1, it is characterised in that the letter
Number process part is used to read the electromagnetic wave signal Wave data, using signal phase relation calculate electromagnetic wave signal relative to
The direction of the signal receiving device.
6. a kind of deterioration point diagnostic system of generator windings coil according to claim 1, it is characterised in that the letter
Number process part includes signal processing apparatus, and signal processing apparatus are made up of analog-digital converter, trigger and computer.
7. a kind of deterioration point diagnostic system of generator windings coil according to claim 6, it is characterised in that the letter
The trigger threshold value of number processing unit is determined by motor three-phase voltage.
8. a kind of deterioration point diagnostic system of generator windings coil according to claim 6, it is characterised in that the letter
The computer part of number processing unit mainly by the phase relation between signal, according to the deterioration electric discharge that two sensors are received
The electromagnetic wave of generation, analyzes signal and reaches the time difference of sensor, and then calculate deterioration point of discharge phase by signal phase
For the direction of the signal receiving device.
9. the deterioration point diagnostic system of a kind of generator windings coil according to claim 1, it is characterised in that described to examine
Disconnected result storage part is mainly used in storing direction of the electromagnetic wave signal relative to the signal receiving device, and deterioration is put
The direction diagnostic result of electricity point is stored in computer or data storage device.
10. the deterioration point diagnostic system of a kind of generator windings coil according to claim 1, it is characterised in that including
Following steps：
S1, receives generator windings coil and deteriorates the electric discharge electromagnetic wave signal for causing respectively by two electromagnetic sensors；
S2, electromagnetic wave signal is transmitted by equal length coaxial cable；
S3, electromagnetic wave signal is transmitted to amplifier by equal length coaxial cable；
Analog-digital converter is set as reception state by S4, trigger according to three-phase voltage given threshold；
S5, converts a signal into data signal；
S6, the data signal that will be transmitted solves time difference and the direction between signal by phase relation：
x1(t)=s (t)+n1(t),
x2(t)=s (t+D)+n2(t),
To receive signal, s is to deteriorate the electromagnetic wave signal that point of discharge is produced to x, and n is noise, and D is the time difference, and t is the time；
The cross-correlation function R between signal is obtained using Fourier transformation12, by after the phase relation for obtaining above formula, even if on
Formula solution is maximized and draws the value of time difference D, then calculates outgoing direction with the position relationship of deterioration point according to sensor, for example under
Formula：
Wherein, d is the citing between sensor, and θ is that the direction of discharge source, c is the transmission speed of battery ripple relative to sensor group
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244165.9A CN106772044A (en) | 2016-12-29 | 2016-12-29 | A kind of generator windings coil deterioration point diagnostic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244165.9A CN106772044A (en) | 2016-12-29 | 2016-12-29 | A kind of generator windings coil deterioration point diagnostic system |
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| CN106772044A true CN106772044A (en) | 2017-05-31 |
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Citations (7)
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|---|---|---|---|---|
| CN201425617Y (en) * | 2009-05-25 | 2010-03-17 | 贵阳新光电气有限公司 | On-line insulation monitoring and grounding positioning device for generator rotors |
| CN102135593A (en) * | 2010-12-28 | 2011-07-27 | 太原理工大学 | On-line diagnosis and evaluation method of insulation state of large electric machine |
| CN103913683A (en) * | 2014-04-02 | 2014-07-09 | 国家电网公司 | Method for rapidly positioning local discharging source based on two UHF sensors |
| CN204044296U (en) * | 2014-08-06 | 2014-12-24 | 国家电网公司 | A kind of partial discharge detecting system |
| CN104797949A (en) * | 2012-11-29 | 2015-07-22 | 三菱电机株式会社 | Insulation inspection device for motors and insulation inspection method for motors |
| CN105223480A (en) * | 2015-10-22 | 2016-01-06 | 西安交通大学 | The Positioning Error Simulation method of aerial array time difference method location transformer station Partial Discharge Sources |
| JP2016014611A (en) * | 2014-07-02 | 2016-01-28 | 株式会社東芝 | Partial discharge position locating method and partial discharge position locating apparatus |
-
2016
- 2016-12-29 CN CN201611244165.9A patent/CN106772044A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201425617Y (en) * | 2009-05-25 | 2010-03-17 | 贵阳新光电气有限公司 | On-line insulation monitoring and grounding positioning device for generator rotors |
| CN102135593A (en) * | 2010-12-28 | 2011-07-27 | 太原理工大学 | On-line diagnosis and evaluation method of insulation state of large electric machine |
| CN104797949A (en) * | 2012-11-29 | 2015-07-22 | 三菱电机株式会社 | Insulation inspection device for motors and insulation inspection method for motors |
| CN103913683A (en) * | 2014-04-02 | 2014-07-09 | 国家电网公司 | Method for rapidly positioning local discharging source based on two UHF sensors |
| JP2016014611A (en) * | 2014-07-02 | 2016-01-28 | 株式会社東芝 | Partial discharge position locating method and partial discharge position locating apparatus |
| CN204044296U (en) * | 2014-08-06 | 2014-12-24 | 国家电网公司 | A kind of partial discharge detecting system |
| CN105223480A (en) * | 2015-10-22 | 2016-01-06 | 西安交通大学 | The Positioning Error Simulation method of aerial array time difference method location transformer station Partial Discharge Sources |
Non-Patent Citations (1)
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| 唐志国等: "基于辐射电磁波检测的电力变压器局部放电定位研究", 《中国电机工程学报》 * |
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Application publication date: 20170531 |