CN108303648A - The monitoring device and its monitoring method of generator's motor shaft operating status - Google Patents
The monitoring device and its monitoring method of generator's motor shaft operating status Download PDFInfo
- Publication number
- CN108303648A CN108303648A CN201810124594.5A CN201810124594A CN108303648A CN 108303648 A CN108303648 A CN 108303648A CN 201810124594 A CN201810124594 A CN 201810124594A CN 108303648 A CN108303648 A CN 108303648A
- Authority
- CN
- China
- Prior art keywords
- carbon brush
- generator
- motor shaft
- grounding
- monitoring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G01R31/343—Testing dynamo-electric machines in operation
Abstract
The present invention relates to a kind of monitoring device and its monitoring method of generator's motor shaft operating status, which includes sampling carbon brush, grounding carbon brush, insulating support, signal monitoring device and earthing or grounding means；Insulating support is set on the radial section of generator's motor shaft, and insulating support is equipped with sampling carbon brush and grounding carbon brush；Sampling carbon brush and grounding carbon brush are contacted with the surface of the radial section of generator's motor shaft respectively；Sampling carbon brush and grounding carbon brush are electrically connected with signal monitoring device；Grounding carbon brush is grounded by earthing or grounding means；Voltage waveform and typical waveform are compared the operating status that analysis obtains generator's motor shaft by the voltage waveform between signal monitoring device monitoring sampling carbon brush and grounding carbon brush.The program obtains the shaft voltage that generator's motor shaft radial section generates, and the operating status of the comparative analysis result monitoring generator's motor shaft of the waveform and typical waveform according to shaft voltage realizes the accurate measurements to the operating status of generator's motor shaft.A kind of generator's motor shaft and steam turbine are also provided.
Description
Technical field
The present invention relates to technical field of motors, a kind of monitoring device more particularly to generator's motor shaft operating status and its
Monitoring method, generator's motor shaft and steam turbine.
Background technology
Generator is at runtime due to field circuit asymmetry of the stator of generator and rotor etc. so that is attached to hair
Electrostatic charge quantity on the big axis of motor, which changes, generates shaft voltage, and harmful effect is caused to the operation of generator.
In terms of the shaft voltage harm for eliminating generator, it is typically employed in bearing bottom of the generator's motor shaft close to exciter end
Seat installs reliable insulation spacer additional, forms the mode of big axis single-point grounding, and formation current loop reaches between avoiding two bearings
The effect of shaft voltage is eliminated, can also one or two be installed simultaneously on the outside of bearing at turbine end in generator's motor shaft simultaneously
The United Nations General Assembly's axis grounding carbon brush is grounded using ground signalling device, if generating the reasons such as the bad electric leakage of shaft voltage, rotor insulation makes greatly
Axis charges, and electric current can be guided into the earth by carbon brush in time, and ground signalling device warns signal, to the shaft voltage of generator's motor shaft
It is monitored so as to judge the operation conditions of generator's motor shaft, convenient for carrying out respective handling to big axis.
Multiple voltage signal sampling points are usually arranged in traditional technology on the axial direction of generator's motor shaft, acquire generator
The shaft voltage signals generated when big axis operation, the operation conditions of generator's motor shaft is judged by the shaft voltage signals acquired.However, this
Kind of technology causes big to generator since the signal relevance between each signal sampling point for being arranged on generator's motor shaft is weak
The reliability that the operation conditions of axis is monitored is relatively low.
Invention content
Based on this, it is necessary to for the low problem of traditional technology reliability, provide a kind of generator's motor shaft operating status
Monitoring device and its monitoring method, generator's motor shaft and steam turbine.
A kind of monitoring device of generator's motor shaft operating status, including sampling carbon brush, grounding carbon brush, insulating support, signal
Monitoring device and earthing or grounding means；
The insulating support is set on the radial section of generator's motor shaft, and the insulating support is equipped with sampling carbon brush and connects
Ground carbon brush；Wherein, the sampling carbon brush and grounding carbon brush are contacted with the surface of the radial section of generator's motor shaft respectively；
The sampling carbon brush and grounding carbon brush are electrically connected with the signal monitoring device respectively；The grounding carbon brush is by connecing
Ground device ground connection；
The sampling carbon brush is used to acquire the electric signal of generator's motor shaft, and the grounding carbon brush is used for will by earthing or grounding means
The generator's motor shaft ground connection；The signal monitoring device is used to monitor the voltage wave between the sampling carbon brush and grounding carbon brush
Shape, and the voltage waveform and the typical waveform to prestore are compared into the operating status that analysis obtains generator's motor shaft.
The monitoring device of above-mentioned generator's motor shaft operating status, samples carbon brush and grounding carbon brush is located at the same of generator's motor shaft
One radial section is simultaneously respectively connected to signal monitoring device, and generator's motor shaft is grounded by grounding carbon brush by earthing or grounding means.Using
The program can obtain the shaft voltage of generator's motor shaft radial section generation, the comparison of waveform and typical waveform according to shaft voltage
Analysis result monitors the operating status of generator's motor shaft, improves the reliability and validity of shaft voltage signals data, overcomes
The weak problem for causing reliability low of relevance between each sampled point of traditional technology shaft voltage signals, realizes to generator
The accurate measurements of the operating status of big axis.
In one embodiment, the sampling carbon brush includes the first sampling carbon brush and the second sampling carbon brush；The ground connection carbon
Brush includes the first grounding carbon brush and the second grounding carbon brush；
The first sampling carbon brush and the second sampling carbon brush are coupled to the signal monitoring device；
First grounding carbon brush and the second grounding carbon brush are connected in parallel to the earthing or grounding means, are also connected in parallel to the signal monitoring
Device；
The first sampling carbon brush and the second sampling carbon brush are for acquiring the same radial section different location of generator's motor shaft
On electric signal；
First grounding carbon brush and the second grounding carbon brush are used for the different location of the same radial section of generator's motor shaft
Point is grounded by earthing or grounding means.
In one embodiment, the first sampling carbon brush, the first grounding carbon brush, the second sampling carbon brush and the second ground connection carbon
Brush cross-distribution on insulating support is arranged.
In one embodiment, the signal monitoring device is further used for obtaining between sampling carbon brush and grounding carbon brush
Voltage waveform extracts the steady-state value and instantaneous value of the shaft voltage of generator's motor shaft, by the shaft voltage from the voltage waveform
Steady-state value and instantaneous value analyzed with the typical waveform data to prestore, monitor generator's motor shaft in real time according to analysis result
Operating status.
In one embodiment, the signal monitoring device is additionally operable to the generator's motor shaft is normal under different operating modes
The typical waveform data of operation are recorded, the Wave data source that the typical waveform data of record are analyzed as a comparison.
In one embodiment, the earthing or grounding means includes shunt resistance and ammeter in parallel；
The shunt resistance of the parallel connection and ammeter one end are connect with grounding carbon brush, and the other end is grounded, for obtaining
The earth current of the generator's motor shaft.
In one embodiment, the through-flow value of the shunt resistance matches setting with the earth protective device of generator；Institute
The resistance value for stating shunt resistance matches setting with the range of ammeter.
In one embodiment, a kind of generator's motor shaft is provided, is equipped on the section of the generator's motor shaft as above any
The monitoring device of generator's motor shaft operating status described in embodiment.
In one embodiment, a kind of steam turbine is provided, which includes the generator's motor shaft described in embodiment as above.
In one embodiment, a kind of generator's motor shaft operating status based on described in any of the above-described embodiment is provided
The monitoring method of the generator's motor shaft operating status of monitoring device, this method comprises the following steps：
Utilize the sampling carbon brush and the grounding carbon brush acquisition generator's motor shaft set on the same radial section of generator's motor shaft
The shaft voltage signals generated when operation；
The shaft voltage signals that the sampling carbon brush and grounding carbon brush acquisition are obtained by signal monitoring device, extract shaft voltage
Shape information, which is compared with the typical waveform information to prestore, obtains the generator's motor shaft
Operating status.
Above-mentioned monitoring method is obtained when generator's motor shaft is run by sampling carbon brush and grounding carbon brush in same radial section
On shaft voltage signals, and the operating status of generator's motor shaft is monitored according to the shape information of the shaft voltage signals, should
Scheme improves the reliability and validity of the shaft voltage signals data of generator's motor shaft, overcomes traditional technology due to each letter
The weak problem for causing reliability low of relevance between number sampled point, realize the operating status of generator's motor shaft is carried out it is accurate
Monitoring.
Description of the drawings
Fig. 1 is the structural schematic diagram of the monitoring device of the generator's motor shaft operating status in one embodiment；
Fig. 2 is the structural schematic diagram of the monitoring device of the generator's motor shaft operating status in another embodiment；
Fig. 3 is the electrical wiring schematic diagram of the monitoring device of the generator's motor shaft operating status in one embodiment；
Fig. 4 is the flow diagram of the monitoring method of the generator's motor shaft operating status in one embodiment.
Specific implementation mode
The specific implementation mode of the monitoring device of the generator's motor shaft operating status of the present invention is carried out below in conjunction with the accompanying drawings
It is described in detail.
In one embodiment, a kind of monitoring device of generator's motor shaft operating status is provided, as shown in FIG. 1, FIG. 1 is one
The structural schematic diagram of the monitoring device of generator's motor shaft operating status in a embodiment, the monitoring device may include：Sampling
Carbon brush 110, grounding carbon brush 120, insulating support 100, signal monitoring device 200 and earthing or grounding means 300；Insulating support 100 is arranged
On the radial section of generator's motor shaft, insulating support 100 is equipped with sampling carbon brush 110 and grounding carbon brush 120, the insulating support
100 when being installed to generator's motor shaft sampling carbon brush 110 and grounding carbon brush 120 can cut with the radial direction of generator's motor shaft respectively
The surface in face is contacted, and the sampling carbon brush 110 and grounding carbon brush 120 are electrically connected with signal monitoring device 200 respectively, are connect
Ground carbon brush 120 is also grounded by earthing or grounding means 300.
In the present embodiment, sampling carbon brush 110 is used to acquire the electric signal of generator's motor shaft, and grounding carbon brush 120 is for leading to
It crosses earthing or grounding means 300 to be grounded generator's motor shaft, signal monitoring device 200 is for monitoring sampling carbon brush 110 and grounding carbon brush 120
Between voltage waveform, and the voltage waveform and the typical waveform that prestores are compared into the operation shape that analysis obtains generator's motor shaft
State, wherein signal monitoring device 200 may include the signal monitorings equipment such as oscillograph, and typical waveform may include that the generator is big
The Wave data for the electric signal that axis generated during former operation.
The present embodiment can utilize insulating support 100 that will sample carbon brush 110 and grounding carbon brush 120 mounted on hair to be monitored
The same radial section of the big axis of motor so that the table of generator's motor shaft can be touched by sampling carbon brush 110 and grounding carbon brush 120
In general face can select the sampling carbon brush 110 and grounding carbon brush 120 of characteristic close.
In generator's motor shaft operational process, sampling carbon brush 110 can collect generator's motor shaft and be produced in the radial surface
Generator's motor shaft is grounded by earthing or grounding means 300 to meet big axis ground connection just by raw shaft voltage signals, grounding carbon brush 120
It often requires, can also be the signal reference point that signal monitoring device 200 provides monitoring shaft voltage signals, signal monitoring device 200
Monitoring in real time can will be obtained by the current shaft voltage signals of the generator's motor shaft for sampling carbon brush 110 and the acquisition of grounding carbon brush 120
The voltage waveform taken is compared to obtain generator's motor shaft current operating situation with history Wave data.
In actual use, for the asymmetric situation of the field circuit of generator unit stator, rotor, due to stator,
The magnetic field of rotor and its distribution are changed, and the electrostatic charge quantity being attached on big axis changes, can be by shaft voltage
Waveform carries out the symmetrical analysis in magnetic field, and to judge whether generator unit stator, rotor turn-to-turn short circuit, slot wedge loosening, end occur solid
Determine situations such as device loosens；For another example in steamer vapour system, if steam carries water droplet, impact friction steam turbine last stage is moved
Blade generates a large amount of electrostatic charge, and the band of steam-turbine system in operation is may determine that by the analysis of electrostatic charge situation of change
Regimen condition can provide foundation for unit optimizing operation.
The monitoring device of the generator's motor shaft operating status of above-described embodiment, samples carbon brush 110 and grounding carbon brush 120 is located at
The radial section of generator's motor shaft is simultaneously respectively connected to signal monitoring device 200, and grounding carbon brush 120 will by earthing or grounding means 300
Generator's motor shaft is grounded.The shaft voltage that the same radial section of generator's motor shaft generates can be obtained using the program, according to axis electricity
The operating status of the waveform of pressure and the comparative analysis result monitoring generator's motor shaft of typical waveform, improves shaft voltage signals data
Reliability and validity, overcome that the relevance between each sampled point of traditional technology shaft voltage signals is weak to cause reliability low
The problem of, realize the accurate measurements to the operating status of generator's motor shaft.
If Fig. 2, Fig. 2 are the structural schematic diagram of the monitoring device of the generator's motor shaft operating status in another embodiment,
In one embodiment, sampling carbon brush 110 may include the first sampling carbon brush 111 and second sampling carbon brush 112, grounding carbon brush
120 may include the first grounding carbon brush 121 and the second grounding carbon brush 122；First sampling carbon brush 111 and second samples carbon brush 112
It is connected in parallel to signal monitoring device 200, the first sampling carbon brush 111 and second samples carbon brush 112 and is located at insulating support 100 not
With the electric signal that on position, can be used for acquiring different sampled points on the same radial section of generator's motor shaft；First grounding carbon brush
121 and second grounding carbon brush 122 be connected in parallel to earthing or grounding means 300, for by the radial section different location of generator's motor shaft
Point is grounded, and the first grounding carbon brush 121 and the second grounding carbon brush 122 are also connected in parallel to signal monitoring device 200, also provide for
Signal monitoring device 200 monitors the voltage reference points of shaft voltage signals.
With reference to figure 3, Fig. 3 is the electrical wiring principle of the monitoring device of the generator's motor shaft operating status in one embodiment
Figure, the present embodiment, can be in the same radial sections of big axis mainly by the way that two sampling carbon brush and two grounding carbon brushs are arranged
Different location point acquire multigroup electrical signal data so that signal monitoring device 200 can pass through two groups of sampling carbon brush and ground connection
Signal data of the shaft voltage on radial section is obtained in carbon brush, and to ensure the reliability of data, big axis is run to improve
The accuracy that state is monitored.
Optionally, in order to further increase the reliability of electrical signal data, sampling carbon brush and grounding carbon brush can be intersected
Arrangement is mounted on insulating support 100, the arrangement mode of this carbon brush can each carbon brush with the contact situation of big axis be highly one
It causes, that is to say, that when generator's motor shaft is run, power generation can be acquired on equally spaced sample point by each carbon brush
Electric signal of the machine large-diameter on section so that the voltage signal data of acquisition is more acurrate, ensure that big axis operating status is online
The reliability and validity of monitoring.
In one embodiment, signal monitoring device 200 can be further used for obtain sampling carbon brush and grounding carbon brush it
Between voltage waveform, from the voltage waveform extract generator's motor shaft shaft voltage steady-state value and instantaneous value, by shaft voltage
Steady-state value and instantaneous value are compared with the typical waveform data to prestore, and generator's motor shaft is monitored in real time according to analysis result
Operating status.
Generator's motor shaft will produce shaft voltage when running, the present embodiment is mainly supervised by signal monitoring device 200 in real time
Survey voltage waveform between sampling carbon brush and grounding carbon brush, obtain the shape information of shaft voltage, including the steady state values of shaft voltage and
The information such as the instantaneous value of shaft voltage, i.e. frequency characteristic are divided the steady-state value of shaft voltage and instantaneous value with history Wave data
Analysis comparison, the result according to analysis comparison obtain the current operating status of generator's motor shaft, reach and monitor big axis operation shape in real time
The effect of state.
In one embodiment, the monitoring of signal monitoring device 200 sampling carbon brush and ground connection with recording function may be used
Voltage waveform between carbon brush, the signal monitoring device 200 can be also used under different operating modes normally transporting generator's motor shaft
Capable typical waveform data are recorded, and the typical waveform data of record are preserved, the Wave data analyzed as a comparison
Source.
With reference to figure 2, in one embodiment, earthing or grounding means 300 may include the shunt resistance 320 and electric current being connected in parallel
Table 310；The shunt resistance 320 of the parallel connection and wherein one end of ammeter 310 can be connected to grounding carbon brush, and the other end is connect
Ground, the earth current for obtaining generator's motor shaft.
In the present embodiment, with reference to figure 3, Fig. 3 is the monitoring device of the generator's motor shaft operating status in one embodiment
Electrical wiring schematic diagram, shunt resistance 320 provides earth point for being grounded grounding carbon brush for big axis, it is possible to understand that
, the resistance value of shunt resistance 320 is generally much less than the contact resistance of carbon brush and big axis, earthing effect can consider be equal to by
Carbon brush is directly grounded.Ammeter 310 is used to monitor the electric current i.e. shaft current of shunt resistance 320, and ammeter 310 can pass through measurement
The pressure drop of shunt resistance 320 is worth to the earth current of generator's motor shaft in real time come measure earth current.
The resistance value of shunt resistance 320 can match setting with the range of ammeter 310, such as may be used 0.005 ohm
The shunt resistance 320 of resistance value can also match while not influencing big axis earthing effect with ammeter 310.Shunt resistance
320 through-current capability usually requires to match selection with the earth protective device of generator, and it is 20 amperes that can select through-current capability
Shunt resistance 320.
Above-described embodiment can obtain connecing for generator's motor shaft using the shunt resistance 320 and ammeter 310 being connected in parallel
Earth-current, the operating status to monitor generator's motor shaft provide data and support, further increase and be monitored to operating status
Accuracy and reliability.
For the low problem of monitoring running state reliability of the traditional technology to generator's motor shaft, in one embodiment,
A kind of generator's motor shaft is also provided, the generator's motor shaft fortune described in any one embodiment as above is installed on the generator's motor shaft
The monitoring device of row state.
Using the generator's motor shaft of the present embodiment, the operating status of generator's motor shaft can be obtained in real time, ensure generator
The safe operation of big axis.
In one embodiment, a kind of steam turbine is provided, which includes generator's motor shaft as described above.
Steam turbine provided in this embodiment uses the generator's motor shaft of the embodiment of the present invention, can be to the generator of steam turbine
Big axis operating status carries out accurate measurements, improves the safety of steam turbine operation.
With reference to figure 4, Fig. 4 is the flow diagram of the monitoring method of the generator's motor shaft operating status in one embodiment,
In one embodiment, a kind of monitoring device based on the generator's motor shaft operating status described in any of the above-described embodiment is provided
Generator's motor shaft operating status monitoring method, this method comprises the following steps：
S101 utilizes the sampling carbon brush and the grounding carbon brush acquisition generator set on the same radial section of generator's motor shaft
The shaft voltage signals generated when big axis operation；
S102 obtains the shaft voltage signals of the sampling carbon brush and grounding carbon brush acquisition, extraction by signal monitoring device
The shape information is compared with the typical waveform information to prestore, obtains the generator by the shape information of shaft voltage
The operating status of big axis.
Above-mentioned monitoring method is obtained when generator's motor shaft is run by sampling carbon brush and grounding carbon brush in same radial section
On shaft voltage signals, and the operating status of generator's motor shaft is monitored according to the shape information of the shaft voltage signals, should
Scheme improves the reliability and validity of the shaft voltage signals data of generator's motor shaft, overcomes traditional technology due to each letter
The weak problem for causing reliability low of relevance between number sampled point, realize the operating status of generator's motor shaft is carried out it is accurate
Monitoring.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of monitoring device of generator's motor shaft operating status, which is characterized in that including sampling carbon brush, grounding carbon brush, insulation
Holder, signal monitoring device and earthing or grounding means；
The insulating support is set on the radial section of generator's motor shaft, and the insulating support is equipped with sampling carbon brush and ground connection carbon
Brush；Wherein, the sampling carbon brush and grounding carbon brush are contacted with the surface of the radial section of generator's motor shaft respectively；
The sampling carbon brush and grounding carbon brush are electrically connected with the signal monitoring device respectively；The grounding carbon brush is filled by being grounded
Set ground connection；
The sampling carbon brush is used to acquire the electric signal of generator's motor shaft, and the grounding carbon brush is used for will be described by earthing or grounding means
Generator's motor shaft is grounded；The signal monitoring device is used to monitor the voltage waveform between the sampling carbon brush and grounding carbon brush,
And the voltage waveform and the typical waveform to prestore are compared into the operating status that analysis obtains generator's motor shaft.
2. the monitoring device of generator's motor shaft operating status according to claim 1, which is characterized in that the sampling carbon brush
Including the first sampling carbon brush and the second sampling carbon brush；The grounding carbon brush includes the first grounding carbon brush and the second grounding carbon brush；
The first sampling carbon brush and the second sampling carbon brush are coupled to the signal monitoring device；
First grounding carbon brush and the second grounding carbon brush are connected in parallel to the earthing or grounding means, are also connected in parallel to the signal monitoring dress
It sets；
The first sampling carbon brush and the second sampling carbon brush are for acquiring on the same radial section different location of generator's motor shaft
Electric signal；
First grounding carbon brush and the second grounding carbon brush are for leading to the different location point of the same radial section of generator's motor shaft
Cross earthing or grounding means ground connection.
3. the monitoring device of generator's motor shaft operating status according to claim 2, which is characterized in that first sampling
Carbon brush, the first grounding carbon brush, the second sampling carbon brush and the second grounding carbon brush cross-distribution on insulating support are arranged.
4. the monitoring device of generator's motor shaft operating status according to any one of claims 1 to 3, which is characterized in that institute
It states signal monitoring device to be further used for obtaining the voltage waveform between sampling carbon brush and grounding carbon brush, from the voltage waveform
The steady-state value and instantaneous value for extracting the shaft voltage of generator's motor shaft, by the steady-state value of the shaft voltage and instantaneous value and the allusion quotation to prestore
Type Wave data is analyzed, and monitors the operating status of generator's motor shaft in real time according to analysis result.
5. the monitoring device of generator's motor shaft operating status according to claim 4, which is characterized in that the signal monitoring
Device is additionally operable to that the typical waveform data of normal operation record under different operating modes by the generator's motor shaft, by record
The Wave data source that typical waveform data are analyzed as a comparison.
6. the monitoring device of generator's motor shaft operating status according to claim 4, which is characterized in that the earthing or grounding means
Including shunt resistance and ammeter in parallel；
The shunt resistance of the parallel connection and ammeter one end are connect with grounding carbon brush, and the other end is grounded, described for obtaining
The earth current of generator's motor shaft.
7. the monitoring device of generator's motor shaft operating status according to claim 6, which is characterized in that the shunt resistance
Through-flow value match setting with the earth protective device of generator；The resistance value of the shunt resistance is matched with the range of ammeter and is set
It sets.
8. a kind of generator's motor shaft, which is characterized in that installation is just like any one of claim 1 to 7 on the section of generator's motor shaft
The monitoring device of the generator's motor shaft operating status.
9. a kind of steam turbine, which is characterized in that including generator's motor shaft as claimed in claim 8.
10. a kind of generator of the monitoring device based on generator's motor shaft operating status as described in any one of claim 1 to 7
The monitoring method of big axis operating status, which is characterized in that include the following steps：
Using set on the same radial section of generator's motor shaft sampling carbon brush and grounding carbon brush acquire the generator's motor shaft and run
When the shaft voltage signals that generate；
The shaft voltage signals that the sampling carbon brush and grounding carbon brush acquisition are obtained by signal monitoring device, extract the wave of shaft voltage
The shape information is compared with the typical waveform information to prestore, obtains the operation of the generator's motor shaft by shape information
State.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810124594.5A CN108303648A (en) | 2018-02-07 | 2018-02-07 | The monitoring device and its monitoring method of generator's motor shaft operating status |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810124594.5A CN108303648A (en) | 2018-02-07 | 2018-02-07 | The monitoring device and its monitoring method of generator's motor shaft operating status |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108303648A true CN108303648A (en) | 2018-07-20 |
Family
ID=62864884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810124594.5A Pending CN108303648A (en) | 2018-02-07 | 2018-02-07 | The monitoring device and its monitoring method of generator's motor shaft operating status |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108303648A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703090A (en) * | 2019-08-30 | 2020-01-17 | 江苏核电有限公司 | Generator shaft current detection device |
| CN112630650A (en) * | 2020-11-11 | 2021-04-09 | 苏州热工研究院有限公司 | Generator shaft voltage acquisition device and system |
| CN112649650A (en) * | 2020-11-18 | 2021-04-13 | 华北电力大学（保定） | Device for measuring generator shaft voltage, measuring method and application |
| CN112737226A (en) * | 2020-12-22 | 2021-04-30 | 国家电投集团江西电力工程有限公司南昌分公司 | Generator main shaft earthing device |
| CN113567730A (en) * | 2021-08-09 | 2021-10-29 | 华能新能源股份有限公司陕西分公司 | Generator shaft voltage measuring method based on rotating speed signal |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100920895B1 (en) * | 2009-02-26 | 2009-10-09 | 주식회사 대덕시스템 | System for monitering shaft voltage and current generator |
| CN101910857A (en) * | 2007-12-07 | 2010-12-08 | 阿尔斯通技术有限公司 | Method for monitoring the shaft current and/or the insulation of the shaft of electric machines and device for performing the method |
| CN105548655A (en) * | 2015-12-07 | 2016-05-04 | 辽宁东科电力有限公司 | Device for monitoring and controlling shaft voltage and shaft current of turbo-generator online |
| CN205622455U (en) * | 2016-05-24 | 2016-10-05 | 哈尔滨国力电气有限公司 | Be used for monitoring of aerogenerator axle voltage and protection return circuit |
| CN205811829U (en) * | 2016-06-07 | 2016-12-14 | 湘电重型装备有限公司 | Shaft voltage for single-bearing generator detects device |
| JP2017078687A (en) * | 2015-10-22 | 2017-04-27 | 株式会社東芝 | Measuring method and measuring device for no-load loss of permanent magnet type rotary electric machine |
| CN206618839U (en) * | 2017-02-28 | 2017-11-07 | 中广核研究院有限公司 | Generator's motor shaft insulating monitoring and positioner |
-
2018
- 2018-02-07 CN CN201810124594.5A patent/CN108303648A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101910857A (en) * | 2007-12-07 | 2010-12-08 | 阿尔斯通技术有限公司 | Method for monitoring the shaft current and/or the insulation of the shaft of electric machines and device for performing the method |
| KR100920895B1 (en) * | 2009-02-26 | 2009-10-09 | 주식회사 대덕시스템 | System for monitering shaft voltage and current generator |
| JP2017078687A (en) * | 2015-10-22 | 2017-04-27 | 株式会社東芝 | Measuring method and measuring device for no-load loss of permanent magnet type rotary electric machine |
| CN105548655A (en) * | 2015-12-07 | 2016-05-04 | 辽宁东科电力有限公司 | Device for monitoring and controlling shaft voltage and shaft current of turbo-generator online |
| CN205622455U (en) * | 2016-05-24 | 2016-10-05 | 哈尔滨国力电气有限公司 | Be used for monitoring of aerogenerator axle voltage and protection return circuit |
| CN205811829U (en) * | 2016-06-07 | 2016-12-14 | 湘电重型装备有限公司 | Shaft voltage for single-bearing generator detects device |
| CN206618839U (en) * | 2017-02-28 | 2017-11-07 | 中广核研究院有限公司 | Generator's motor shaft insulating monitoring and positioner |
Non-Patent Citations (1)
| Title |
|---|
| 黄景云: "大型汽轮发电机转子轴电压在线监测", 《科技创新导报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703090A (en) * | 2019-08-30 | 2020-01-17 | 江苏核电有限公司 | Generator shaft current detection device |
| CN110703090B (en) * | 2019-08-30 | 2022-04-19 | 江苏核电有限公司 | Generator shaft current detection device |
| CN112630650A (en) * | 2020-11-11 | 2021-04-09 | 苏州热工研究院有限公司 | Generator shaft voltage acquisition device and system |
| CN112649650A (en) * | 2020-11-18 | 2021-04-13 | 华北电力大学（保定） | Device for measuring generator shaft voltage, measuring method and application |
| CN112737226A (en) * | 2020-12-22 | 2021-04-30 | 国家电投集团江西电力工程有限公司南昌分公司 | Generator main shaft earthing device |
| CN112737226B (en) * | 2020-12-22 | 2022-10-18 | 国家电投集团江西电力工程有限公司南昌分公司 | Grounding device for large shaft of generator |
| CN113567730A (en) * | 2021-08-09 | 2021-10-29 | 华能新能源股份有限公司陕西分公司 | Generator shaft voltage measuring method based on rotating speed signal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108303648A (en) | The monitoring device and its monitoring method of generator's motor shaft operating status | |
| Artigao et al. | Current signature analysis to monitor DFIG wind turbine generators: A case study | |
| Popa et al. | Condition monitoring of wind generators | |
| US10088506B2 (en) | Method for detecting a fault condition in an electrical machine | |
| CN103823150B (en) | Turbo generator rotor interturn short circuit fault diagnosis method of multi sensor joint | |
| Chen et al. | Bearing corrosion failure diagnosis of doubly fed induction generator in wind turbines based on stator current analysis | |
| CN103926506B (en) | Based on the rotor of steam turbo generator Winding Short Fault Diagnosis method of constructor | |
| CN108490238B (en) | Turbo generator shaft current alarm data processing device and method | |
| GB2457590A (en) | Methods and systems for detecting abnormalities in rotating machinery | |
| JP2005538371A (en) | Apparatus and method for monitoring and / or analyzing an electrical machine during operation | |
| US8143899B2 (en) | Method and apparatus for detecting partial discharges in electrical systems | |
| JP2005538370A (en) | Method and apparatus for capturing vibration of a shaft assembly in an electric machine | |
| Stone et al. | Unusual PD pulse phase distributions in operating rotating machines | |
| CN207799037U (en) | Monitoring device, generator's motor shaft and the steam turbine of generator's motor shaft operating status | |
| MXPA03010012A (en) | Detection method for speed sensitive winding earthing of generator exciter winding. | |
| CN103792463A (en) | Steam-turbine generator rotor winding short trouble diagnosis method based on fictitious power principle | |
| Kerszenbaum et al. | Utilization of repetitive surge oscillograph (RSO) in the detection of rotor shorted-turns in large turbine-driven generators | |
| Stone et al. | Monitoring of shaft voltages and grounding currents in rotating machines | |
| Maughan et al. | Advances in motor and generator rotor health | |
| EP0256845A2 (en) | Jet engine gas path condition monitoring | |
| Kheirmand et al. | Advances in online monitoring and localization of partial discharges in large rotating machines | |
| CN113777530B (en) | Open-circuit fault diagnosis method for rotating diode of inner rotor type three-phase brushless exciter | |
| Hudon et al. | The importance of phase resolved partial discharge pattern recognition for on-line generator monitoring | |
| Sarma et al. | Condition monitoring of rotating electrical machines | |
| JP7217682B2 (en) | Diagnosis system and method for rotary electric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180720 |
|
| RJ01 | Rejection of invention patent application after publication |