CN104482859B - A kind of hydraulic generator stator core displacement on-line monitoring system - Google Patents
A kind of hydraulic generator stator core displacement on-line monitoring system Download PDFInfo
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- CN104482859B CN104482859B CN201410634893.5A CN201410634893A CN104482859B CN 104482859 B CN104482859 B CN 104482859B CN 201410634893 A CN201410634893 A CN 201410634893A CN 104482859 B CN104482859 B CN 104482859B
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Abstract
The present invention relates to hydrogenerator monitoring running state technical field, more particularly to a kind of hydraulic generator stator core displacement on-line monitoring system.Sensor fibre is laid in stator core groove portion by the present invention, by the monitoring to sensor fibre luminous power, is realized the monitoring to stator core displacement indirectly, is found stator core failure in time and carry out fault location.
Description
Technical field
The present invention relates to hydrogenerator monitoring running state technical field, more particularly to a kind of hydraulic generator stator
Iron core displacement on-line monitoring system.
Background technology
Turbine-generator units are hydroelectric power plant's nucleus equipments, are made up of the hydraulic turbine and generator two parts.The hydraulic turbine is power
Equipment, it is the power resources of power plant, is the equipment that the potential energy of water and kinetic energy are converted into mechanical energy；Generator is by hydraulic turbine machine
Tool can be converted into the equipment of electric energy, drive lower generator amature to rotate by hydraulic turbine turbine rotor, stator coil and rotor shape
Into cutting magnetic line, rotor mechanical energy is converted into electric energy, realizes and generates electricity.Hydrogenerator is by rotor, stator, frame, thrust
The critical pieces such as bearing, main shaft, cooling device form.Stator is mainly made up of parts such as support, iron core and three-phase windings.It is large-scale
Hydraulic generator stator core is built up with cold-reduced silicon sheet, stator core groove portion hookup wire circle winding, large-sized water turbine generator around
Group is using insulation bar.
In the process of running, Stator Slots silicon steel sheet is broken hydroelectric power plant's hydrogenerator, in generator field pulling force effect
Under, the silicon steel sheet of fracture cuts through the insulating barrier of stator coil, generator stator ground, is happened occasionally by the accident of forced-stopping machine, makes
Into huge economic loss.
Generator stator core silicon steel sheet is producing metal fatigue under by temperature creep stress and unit vibration synergy
Fracture, the iron core silicon-steel sheet of fracture have broken away from that pressure unshakable in one's determination refers to and the limitation of fixing bolt, pulling force and unit in operation magnetic field shake
It is subjected to displacement in the presence of the torques such as power.Be broken silicon steel sheet or direct cutting stator bar insulation son, or be inhaled into stator and
Gap between rotor, is adsorbed on rotor magnetic pole, to the whole stator of generator circumferentially on formed it is whole circle cut, cause insulation lose
Effect, occurs Stator ground fault, and the hydraulic turbine is shut down.
Hydrogenerator is arranged in closed Dynamo Room, and generator unit stator maintenance need to dismantle generator upper spider, turn
It could be overhauled after the large components such as son, therefore periodic inspection is usually taken in hydrogenerator, or in alternator failure
Shutdown maintenance afterwards.In periodic inspection interval, the deterioration that electricity generator stator core occurs can not be found in time, until generator is sent out
Raw failure operation personnel could perceive, and now serious failure has occurred for generator, causes heavy economic losses.
To find hydraulic turbine stator core failure in time, iron core failure is found in time in failure early period of origination, avoids water wheels
Machine interruption of service occurs, it is necessary to a kind of hydraulic generator stator core displacement on-line monitoring system is researched and developed, to realize to large-scale
Water wheels are found and on-line monitoring is realized in stator core displacement, find the influence unit safety operation of outlet in hydraulic turbine operation in time
Hidden danger, investigation, in time maintenance, avoid failure propagation in time, realize automatic monitoring, automatic alarm, fault location, are the hydraulic turbine
Operation provides reliable guarantee and support.
In consideration of it, the defects of overcoming present in the prior art is the art urgent problem to be solved.
The content of the invention
It is real the technical problem to be solved in the present invention is to provide a kind of hydraulic generator stator core displacement on-line monitoring system
When monitor stator core displacement, in time find stator core failure.
The present invention adopts the following technical scheme that：
A kind of hydraulic generator stator core displacement on-line monitoring system, it is characterised in that including：
The sensor fibre of stator core groove portion is laid in, the sensor fibre includes the first optical fibre core for being set up in parallel and the
Two optical fibre cores, the sensor fibre also include optical fiber jacket, and the optical fiber jacket is by the first optical fibre core and the second fiber cores
Line is integratedly kept, and the sensor fibre is arranged to sinusoidal waveform in stator core groove portion, and the sensor fibre is located at institute
State stator core groove portion inwall；
Optical Power Monitor Module, including：Optical switch element, luminous power metering units, light source, teledata control unit and
Alarm Unit；
Wherein, the one of first optical fibre core of the teledata control unit through the optical switch element and sensor fibre
End is connected；The light source is connected with the first end of second optical fibre core, the luminous power metering units are arranged on the second light
Second end of fibre core line, the first end that the light source produces monitoring light from second optical fibre core is sent to the second end, by light
Power measurement unit receives；When below optical power down a to predetermined threshold value for the monitoring light of transmission, the Alarm Unit production
Raw alarm signal to teledata control unit, teledata control unit is tested the first optical fibre core with test light,
Alarm Unit is divided into three-level alarm, and the third level is minimum, first order highest, and third level alarm has decay to exceed system for luminous power
Three-level alarm threshold limit value, OTDR roll-call tests need to be started；Second level alarm has decay to exceed system second level announcement for luminous power
Alert threshold limit, sensor fibre is judged by severe crush, control system starts OTDR and carries out fault scanning, by positioning light
Fine reflected light is monitored, by Monitoring Data and light power meter monitoring attenuation data compare, determine luminous power whether with luminous power
Meter test data is coincide, system audible and visual alarm, manpower intervention；First order alarm inputs for light power meter without optical signal, represents light
Fibre has been cut off, system automatic start up system audible and visual alarm, while control system starts OTDR and carries out trouble location scanning, real
Existing fault location, hydraulic turbine forced stoppage inspection.
In some embodiments, the teledata control unit includes optical time domain reflection subelement and control subelement,
The control subelement is used to receive the alarm signal of Alarm Unit and starts optical time domain reflection subelement to the first optical fibre core
Tested.
In some embodiments, the on-line monitoring system also includes：
One data memory module for storing Monitoring Data；
One is used for the power module of power supply.
In some embodiments, also it is sequentially provided between the luminous power metering units and the Alarm Unit：
Photoelectric conversion unit, the optical signal for being exported to luminous power metering units carry out opto-electronic conversion；
And linear process unit, the electric signal for being exported to the photoelectric conversion unit carry out linear process.
In some embodiments, the optical switch element has multiple optical fiber interfaces.
Compared with prior art, the beneficial effects of the present invention are：Sensor fibre is laid in stator core slot by the present invention
Portion, by the monitoring to sensor fibre luminous power, the monitoring to stator core displacement is realized indirectly, finds stator core event in time
Hinder and carry out fault location.
Brief description of the drawings
Fig. 1 is a kind of structured flowchart of embodiment of the on-line monitoring system of the present invention；
Fig. 2 is the structured flowchart of the another embodiment of the on-line monitoring system of the present invention；
Fig. 3 is the structural representation of sensor fibre in on-line monitoring system of the invention；
Fig. 4 is the layout drawing of sensor fibre in on-line monitoring system of the invention；
Fig. 5 be fiber arrangement figure shown in Fig. 4 along B-B to sectional view.
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.
Firstly, it is necessary to explanation, below by an illustrative manner to the concrete structure and feature of integrated form cell structure
Illustrate, should not be construed as any restrictions formed to the present invention.Secondly, mentioned in specific examples below
（Specifically describe or implicit open）Any one technical characteristic, and be directly displayed or implicit in various figures any
One technical characteristic, still can be in these technical characteristics（Or its equivalent）Between continue to be combined or delete, from
And obtain the more other embodiments that may do not referred to directly in the present invention.
Refer to shown in Fig. 1 to Fig. 5, schematically illustrate the water of the present invention by way of example by these accompanying drawings
The basic structure and its stator with hydrogenerator of turbine generator stator core displacement on-line monitoring system one embodiment
Matching relationship between iron core.As above shown in accompanying drawing, in the embodiment that this is provided, sensor fibre 1 is laid in stator iron
The groove portion of core 16, the luminous power of sensor fibre 1 is monitored by Optical Power Monitor Module 2, realized indirectly to stator iron
The monitoring of the displacement of core 16, while failure is positioned using sensor fibre 1.
Compared with prior art, the present invention arranges sensor fibre on stator core, stable by applying to sensor fibre
Light source, scattered using optical fiber under compression and case of bending and increase this physical phenomenon, the stabilized light source transmitted on optical fiber because
Optical fiber is pressurized and curved bel carrys out the optical power loss that light scattering increase causes output；Sensor fibre is by stator iron in extreme circumstances
Chip cutting is broken, and light transmits in a fiber occurs Fei Nieer reflections, and light can not be exported by sensor fibre, sensor fibre output
Hold Output optical power almost nil；By comparing sensor fibre input and Output optical power, monitoring light is propagated in sensor fibre
During luminous power change, in real time reflect stator core displacement change.
Refer to shown in Fig. 3, the sensor fibre 1 of the present embodiment includes the first optical fibre core 1a being set up in parallel and the
Two optical fibre core 1b, in addition to optical fiber jacket 1c, optical fiber jacket 1c is by the first optical fibre core 1a and the second optical fibre core 1b mono-
Keep body, ensure that two optical fibre cores in sensor fibre can bear identical load and answer under same working condition
Power.Wherein, the second optical fibre core 1b plays sensing effect, can learn the state of stator core 16 indirectly according to its state
（Whether it is squeezed or cuts）.First optical fibre core 1a plays positioning action, when judging 16 operation exception of stator core
Carry out fault location.
Referring to shown in Fig. 4 and Fig. 5, sensor fibre 1 is arranged to sinusoidal waveform in the groove portion of stator core 16,
And the groove portion inwall of stator core 16 is attached at, it is packaged in being additionally provided with insulation in groove, in groove by fastening epoxy resin layer 12
Bar 14 and groove Xie 15.It is low using 3M companies 3M Scotch-Weld between sensor fibre 1 and stator core 16
Smell acrylic acid adhesive DP810 carries out sensor fibre 1 and is carried out with stator core 16 be bonded, then applies epoxy novolac insulated paint.
Two fibre cores of sensor fibre 1 are high purity glass in the present embodiment, 9 μm of core diameter, when stator core 16 is broken, its
In strong magnetic field action lower slider, because the thickness of stator core 16 is 0.35mm, fracture is usually zigzag, the stator core of fracture
Optical fiber can be cut off rapidly under strong magnetic field action, once sensor fibre is cut off, luminous power metering units will be unable to detect logical
The luminous power of sensor fibre input is crossed, i.e. luminous power is zero, so can directly judge that sensor fibre is broken.
Refer to shown in Fig. 1, Optical Power Monitor Module 2 includes：Optical switch element 21, luminous power metering units 22, light
Source 23, teledata control unit（Remote Terminal Unit, RTU）24 and Alarm Unit 25.
Wherein, first optical fibre core 1a of the teledata control unit 24 through optical switch element 21 Yu sensor fibre 1
One end be connected, light source 23 is connected with the second optical fibre core 1b first end, and luminous power metering units 22 are arranged on the second light
Fibre core line 1b the second end, the first end that light source 23 produces monitoring light from the second optical fibre core 1b is sent to the second end, by light
Power measurement unit 22 receives, when transmission monitoring light optical power down a to predetermined threshold value below when, Alarm Unit 25
Alarm signal is produced to teledata control unit 24, teledata control unit 24 is with test light to the first optical fibre core 1a
Tested, to be positioned to failure.Light source 23 can be LASER Light Source well known to those skilled in the art, by diode
Laser produces, for example, being responsible for providing stable light source to whole Optical Power Monitor Module using high stable LASER Light Source, uses
Diode laser generator, detected with automatic backlight and automatically adjust closed loop circuit, to meet light power stabilising, output light work(
Rate scope is >=-10dBm, spectral width 4nm, 1550 ± 20nm of wavelength, while can provide stabilized light sources to 8 road optical fiber, by
1 road optical power monitoring optical fiber is only needed in every 1 turbine-generator units, to ensure that system has certain alternate channel, is generally pressed
20% passage is as standby, therefore to be available for 6 water turbine set luminous power on-line monitoring systems to provide reliable for 1 lamp source disc maximum
Light source.
Further, in another better embodiment, teledata control unit 24 includes optical time domain reflection subelement
（OTDR）241 are used to receive the alarm signal of Alarm Unit 25 and start with control subelement 242, control subelement 242
Optical time domain reflection subelement 241 is tested the first optical fibre core 1a.
Further, the on-line monitoring system also includes：Data memory module 3 and power module 4, data memory module 3
For storing Monitoring Data, power module 4 is used to power for whole monitoring system.
Further, photoelectric conversion unit 26 is also sequentially provided between luminous power metering units 22 and Alarm Unit 25
With linear process unit 27, wherein, photoelectric conversion unit 26 be used for luminous power metering units 22 export optical signal carry out
Opto-electronic conversion, linear process unit 27 are used to carry out linear process to the electric signal that photoelectric conversion unit 26 exports.
Further, optical switch element 21 has multiple optical fiber interfaces.
The present invention on-line monitoring system realized in the form of combination of hardware software, wherein, in Optical Power Monitor Module
Part-structure can use hardware realize, for example, optical switch element 21, luminous power metering units 22, light source 23, teledata control
Optical time domain reflection subelement 241 and Alarm Unit 25 in unit 24 processed.In addition, control subelement 242 can be by soft
Part is realized.
Further, Alarm Unit 25 of the invention can be divided into three-level alarm according to experiment test data, wherein, accuse
Alert threshold value is provided with three, and the third level is minimum, first order highest, and third level alarm has decay to exceed the system third level for luminous power
Alarm threshold limit value, OTDR roll-call tests need to be started；Second level alarm has decay to exceed system second level alarm threshold for luminous power
It is worth limit value, judges that sensor fibre by severe crush, shows stator lamination displacement pressing sensing optical fiber, control system starts
OTDR carries out fault scanning, by being monitored to positioning fiber reflection light, by Monitoring Data and light power meter monitoring decay number
According to comparison, determine whether luminous power coincide with light power meter test data, system audible and visual alarm, staff's interventional systems behaviour
Make, hydraulic turbine shutdown inspection when having ready conditions；First order alarm inputs for light power meter without optical signal, represents that optical fiber has been cut off,
System automatic start up system audible and visual alarm, judges sensor fibre by severe crush or has been broken, and shows stator lamination position
Move or laser cutting sensor fibre, while control system starts OTDR and carries out trouble location scanning, realizes fault location,
Hydraulic turbine forced stoppage inspection.
What deserves to be explained is in information exchange, implementation procedure between module, unit in said apparatus and system etc.
Hold, due to being based on same design with the processing method embodiment of the present invention, particular content can be found in the inventive method embodiment
Narration, here is omitted.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of embodiment is to lead to
Program is crossed to instruct the hardware of correlation to complete, the program can be stored in a computer-readable recording medium, storage medium
It can include：Read-only storage（ROM, Read Only Memory）, random access memory（RAM, Random Access
Memory）, disk or CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
- A kind of 1. hydraulic generator stator core displacement on-line monitoring system, it is characterised in that including：The sensor fibre of stator core groove portion is laid in, the sensor fibre includes the first optical fibre core and the second light being set up in parallel Fibre core line, the sensor fibre also include optical fiber jacket, and the optical fiber jacket is by the first optical fibre core and the second optical fibre core one Keep, the sensor fibre is arranged to sinusoidal waveform in stator core groove portion, and the sensor fibre is located at described fixed body Sub- iron core groove portion inwall；Optical Power Monitor Module, including：Optical switch element, luminous power metering units, light source, teledata control unit and alarm Unit；Wherein, one end phase of the teledata control unit through the optical switch element with the first optical fibre core of sensor fibre Even；The light source is connected with the first end of second optical fibre core, the luminous power metering units are arranged on the second fiber cores Second end of line, the first end that the light source produces monitoring light from second optical fibre core is sent to the second end, by luminous power Metering units receive；When below optical power down a to predetermined threshold value for the monitoring light of transmission, the Alarm Unit produces announcement Alert signal to teledata control unit, teledata control unit is tested the first optical fibre core with test light；Alarm Unit is divided into three-level alarm, and the third level is minimum, first order highest, and third level alarm has decay to exceed the system third level for luminous power Alarm threshold limit value, OTDR roll-call tests need to be started；Second level alarm has decay to exceed system second level alarm threshold for luminous power It is worth limit value, judges sensor fibre by severe crush, control system starts OTDR and carries out fault scanning, by anti-to positioning optical fiber Penetrate light to be monitored, Monitoring Data and light power meter monitoring attenuation data are compared, determine whether luminous power measures with luminous power Examination data are coincide, system audible and visual alarm, manpower intervention；First order alarm inputs for light power meter without optical signal, has represented optical fiber It is cut off, system automatic start up system audible and visual alarm, while control system starts OTDR and carries out trouble location scanning, realizes event Barrier positioning, hydraulic turbine forced stoppage inspection.
- 2. hydraulic generator stator core displacement on-line monitoring system according to claim 1, it is characterised in that described remote Journey DCU data control unit includes optical time domain reflection subelement and control subelement, and the control subelement is used to receive Alarm Unit Alarm signal and start optical time domain reflection subelement the first optical fibre core tested.
- 3. hydraulic generator stator core displacement on-line monitoring system according to claim 1, it is characterised in that this is online Monitoring system also includes：One data memory module for storing Monitoring Data；One is used for the power module of power supply.
- 4. hydraulic generator stator core displacement on-line monitoring system according to claim 1, it is characterised in that described Also it is sequentially provided between luminous power metering units and the Alarm Unit：Photoelectric conversion unit, the optical signal for being exported to luminous power metering units carry out opto-electronic conversion；AndLinear process unit, the electric signal for being exported to the photoelectric conversion unit carry out linear process.
- 5. hydraulic generator stator core displacement on-line monitoring system according to claim 1, it is characterised in that the light Switch element has multiple optical fiber interfaces.
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| KR102058135B1 (en) * | 2019-08-09 | 2019-12-20 | 임형빈 | 3-Dimension automatic measuring system |
| CN112097955A (en) * | 2020-08-18 | 2020-12-18 | 国电大渡河检修安装有限公司 | Fiber optic sensing monitoring method for lead temperature of hydraulic generator rotor |
| CN112902853A (en) * | 2021-01-28 | 2021-06-04 | 四川恒诚达科技有限公司 | Hydraulic generator rotor magnetic pole laser ranging system and method |
| CN114062926A (en) * | 2021-11-26 | 2022-02-18 | 天津中德应用技术大学 | Generator fault detection method and device and electronic equipment |
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| CN201852564U (en) * | 2010-01-12 | 2011-06-01 | 武汉烽火富华电气有限责任公司 | Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding |
| CN103217814A (en) * | 2013-04-22 | 2013-07-24 | 哈尔滨工程大学 | Optical electro-optic intensity modulator and preparation method thereof |
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| JP2001197002A (en) * | 2000-01-07 | 2001-07-19 | Matsushita Electric Ind Co Ltd | Optical receiver |
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| CN103743357A (en) * | 2014-01-24 | 2014-04-23 | 西安科技大学 | Fiber bragg grating separation layer device for monitoring deformation of rock roof |
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| CN1292609A (en) * | 1999-10-08 | 2001-04-25 | 深圳市华为技术有限公司 | Optical power monitoring system |
| CN201852564U (en) * | 2010-01-12 | 2011-06-01 | 武汉烽火富华电气有限责任公司 | Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding |
| CN103217814A (en) * | 2013-04-22 | 2013-07-24 | 哈尔滨工程大学 | Optical electro-optic intensity modulator and preparation method thereof |
| CN203261335U (en) * | 2013-04-28 | 2013-10-30 | 国家电网公司 | Optical cable on-line monitoring device |
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