WO2004025316A1 - Vorrichtung und verfahren zur überwachung und/oder analyse von elektrischen maschinen im betrieb - Google Patents
Vorrichtung und verfahren zur überwachung und/oder analyse von elektrischen maschinen im betrieb Download PDFInfo
- Publication number
- WO2004025316A1 WO2004025316A1 PCT/EP2003/050611 EP0350611W WO2004025316A1 WO 2004025316 A1 WO2004025316 A1 WO 2004025316A1 EP 0350611 W EP0350611 W EP 0350611W WO 2004025316 A1 WO2004025316 A1 WO 2004025316A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- frequency
- generator
- analysis unit
- wave
- Prior art date
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
- G01R31/346—Testing of armature or field windings
-
- 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
-
- 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
Definitions
- the present invention relates to a device and a method for monitoring and / or analyzing electrical machines in operation.
- the electrical machine comprises at least one generator with a shaft and drive means for driving this shaft, the shaft on the first side of the generator being essentially directly earthed and a measuring unit for measuring shaft voltage and on the shaft on the second side of the generator / or wave current is provided as a function of time.
- it is a device for use in power plants.
- Electrical machines in particular large electrical machines, such as those used in power plants, should be continuously monitored and / or analyzed from time to time in order to ensure smooth operation in order to identify fault states in good time and to avoid uncontrolled failures.
- US Pat. No. 5,006,769 describes a device for the detection of short circuits in the rotor winding of generators.
- the shaft voltage is measured using a special grounding module and analyzed in a specific way using Fourier transformation.
- EP 0271678 in turn proposes a device with which statements can be made about the functionality and reliability of the shaft grounding or the insulation of the shaft.
- the proposed device which is actually intended to reduce shaft voltages, allows statements to be made about the overall grounding conditions of the electrical machine.
- a large number of documents describe devices which serve to detect brush fires on the slip rings. They include e.g. US 3,653,019, US 4,058,804, US 4,163,227 and US 4,451,786.
- a measuring device to be provided for this purpose is connected directly to the brushes, and, as this is the main thrust of these documents, data processing is then carried out which distinguishes interference signals from useful signals.
- the gating method is primarily used for this purpose, in which interference signals are detected and the detection is interrupted during the interference signals (blanking).
- Another method for detecting brush fire is proposed in US Pat. No. 4,577,151, in which a characteristic signal is recorded via an antenna to be provided for this purpose and is then fed to an analysis unit. The antenna must be placed near the slip rings to receive the corresponding high-frequency signals.
- the signals are then amplified in a special analysis unit, demodulated and then fed to a detector.
- a method for recognizing a further fault condition is described in US 4,814,699. It is about the detection of partial discharges in the stator, rotor, or in the excitation device.
- the shaft is used as an antenna and the high-frequency pulses are decoupled via the (insulated) shaft bearing or via a coupling coil to be provided for this purpose.
- the bearings of the For this purpose waves must be electrically insulated from earth, and again it is explained how interference signals in this specific signal can be distinguished from useful signals.
- vibrations of the shaft train of a machine can be of different types. These can be bending vibrations or transverse vibrations that occur in the direction perpendicular to the shaft. So-called oscillations can also occur. H. usually quasi-periodically damped changes in the rotational frequency of the shaft around the mains frequency of usually 50 Hz (or 60 Hz), which are caused by e.g. intermittent disturbances are generated in the network.
- the third type of shaft vibration is the actual torsional vibration, which e.g. can be generated by sudden load increases on the network. Torsional vibrations are vibrations that manifest themselves in a non-uniform rotational frequency along the shaft (phase shifts or frequency shifts), i. H. cause torsion of the shaft.
- the torsional vibrations are very small vibrations, usually in the range of 0.01 degrees phase amplitude, but which can nevertheless lead to a very high load on the shaft, and in particular a coincidence of the natural frequency of such a torsional vibration with the stimulating stimulus can be a dangerous one
- Such rocking vibrations lead to rocking, which can even result in the shaft breaking.
- Torsional vibrations can have frequencies from a few Hz to 200 Hz, the frequency of course depending on the material properties and thickness of the shaft, the masses connected to the shaft and the size of the system. These torsional vibrations can become extremely critical, especially in large systems with long shafts.
- US 3,934,459 describes a measuring device or a method for measuring the Torsional vibrations of the entire shaft train of a turbine generator system.
- the torsional vibrations are recorded at one or more points of the shaft via one or more sensors, which are not specifically specified, and which are to be provided for this purpose.
- the further processing of the torsion signals is the main topic of this document. Further processing takes place by filtering with band filters and multiplications in order to determine the maximum torsional moments at the end.
- the invention is based on the object of providing an alternative device for the comprehensive detection of fault states of an electrical machine, which has sufficient accuracy and can be implemented in a structurally simple, inexpensive and robust manner, and which in particular continuous monitoring in the usual way Operation allowed.
- This is a device for monitoring and / or analyzing electrical machines in operation, the electrical machine comprising at least one generator with a shaft and drive means for driving this shaft, the shaft being essentially directly grounded on the first side of the generator and a measuring unit for measuring shaft voltage and / or shaft current as a function of time is particularly preferably provided on the shaft on the second side of the generator.
- wave voltage signals and / or wave current signals are fed to an analysis unit, the analysis unit allowing a combined and simultaneous analysis of at least two potential fault states of the electrical machine.
- the essence of the invention is therefore on the one hand to determine that the measurement of wave voltage and / or wave current statements about different behaviors or. Error states of an electrical machine allowed. If the analysis unit is modified in such a way that it is able to combine and simultaneously record the signals that are characteristic of different error states, a combination measuring device is obtained which is equipped with the elements that are usually present (grounding on one side of the generator and unit for measurement of wave tension on the other hand of the generator) can be operated. Such a combination measuring device, in which a plurality of error states can be recorded simultaneously simultaneously on the basis of a measurement and thus to a certain extent from a single data set, permits a significantly more detailed analysis of the signals, with improved possibilities for the combined interpretation of different effects.
- a combination measuring device of this type has the major advantage that the correlation between different error states can also be automated and allows targeted warning messages (alerts).
- alerts targeted warning messages
- not only peak values and mean values can be used, but actually measurements in the frequency and in the time domain over the entire spectrum of the signal, ie in the low-frequency as well as in the high-frequency range at the same time.
- the shaft voltages and wave currents considered here are due to, among other things, magnetic asymmetries in the environment of the generator shaft, due to electrostatic charges on the generator shaft, due to external electrical fields that capacitively couple the shaft voltages into the generator shaft, or due to magnetic remanence in the rotating shaft, e.g. due to from residual magnetization of the shaft to state.
- the shaft voltages and shaft currents generally represent a potential hazard for various components of the generator and can lead to damage to the generator if they are either not reduced to a tolerable level or if the grounding concept of the shaft train is unsuitable.
- Another core of the invention also consists in the completely surprising finding that the wave current or the wave voltage is not only the above-mentioned information according to EP-A1-0 271 678 about the functionality and reliability of the shaft grounding, or also the information according to the one to be mentioned EP-A2-0 391 181 contains information about rotor turns, but that these signals also hide extensive information about other error states and that they can be evaluated synchronously in a single analysis unit. Accordingly, it is possible, for example, to dispense with devices that are usually to be specially provided for measuring vibrations, and to measure shaft voltage or shaft current with the possibly already available devices for monitoring the functionality or the rotor turns, and conclusions about vibrations of the shaft can be drawn from the data obtained in the process to make at the same time with other error conditions.
- the measurement of wave current and / or wave voltage is a sufficiently precise and very suitable method for determining fault conditions, especially for long-term observations.
- the fault states accessible via this analysis unit via the measurement of shaft voltage and / or shaft current are at least two different fault states selected from the following group: short turns in the rotor winding; Functional weakness of wave grounding as well as insulation weakness of the wave; Insulation weakness of the rotor winding; Spark erosion of the wave; Brush fires, especially on the slip rings; Partial discharges in the stator and or in the rotor and / or in the excitation device; Vibrations of the shaft, in particular torsional vibrations, and / or bending vibrations and / or oscillations; Sparks in the excitation device and / or the rotor winding; synchronous chatter marks and / or grazing points.
- At least one of the fault states is preferably high-frequency spark activity, such as spark erosion on the shaft or sparks in the excitation device and / or the rotor winding, or dangerous vibrations of the shaft such as transverse bending vibrations, oscillations or torsional vibrations.
- a preferred embodiment of the device according to the invention is characterized in that a grounding unit is provided on the first side of the generator for grounding the shaft, which in turn allows the measurement of shaft voltage and / or shaft current as a function of time.
- These signals are also fed to the analysis unit, combined in the analysis unit and evaluated simultaneously with the signals from the measurement unit.
- the additional measurement on the second side of the generator (or in the case of several generators at different locations between these generators) by means of the measuring unit allows an effective localization of error states along the shaft. For example, In this way, it can be determined which bearing is actually undergoing spark erosion, since the differential behavior of the two measured values of the grounding unit and the measuring unit permits appropriate conclusions to be drawn.
- the analysis unit evaluates both in the low-frequency and in the high-frequency signal range.
- the analysis unit has in particular preferably by means with which the incoming signals can be filtered in a frequency-selective manner.
- the different error states generate signal components in different frequency ranges. For example, it can be useful to use the low-frequency range simultaneously and preferably by means of Fourier analysis to determine short-circuit turns and / or hazardous vibrations of the shaft and the high-frequency range to determine spark activity.
- the means can be a low-pass filter and a high-frequency band-pass filter, by means of which the incoming signals (signal from wave voltage or wave current from measuring unit or grounding unit) are alternatively filtered either simultaneously or in a switched manner.
- the means can either be designed as passive filters, but it is also possible to use frequency-selective amplifiers.
- the low-pass filter is preferably designed to be permeable to frequencies below 20 kHz and the high-frequency band-pass filter is designed to be transparent to frequencies in the range from 20 kHz to 40 MHz, particularly preferably from 1 MHz to 40 MHz, in a preferably adjustable manner.
- a further preferred embodiment of the present invention has the feature that the analysis unit is additionally supplied with further data or signals about fault conditions that are not based on the measurement of shaft voltage and / or shaft current, and these are combined and combined with the shaft voltage and / or the shaft current simultaneously be monitored or analyzed with regard to error states.
- additional data or signals can consist, for example, in measurement signals of the partial discharge measurements on the stator phase windings or measurements of spark activity on the slip ring brushes. If these additional data or signals, which are acquired via other mechanisms, are also fed to the analysis unit, then further correlations between error states can be determined and used for diagnosis.
- the analysis in the analysis unit takes place as a scan, particularly preferably using an analog-to-digital converter (ADC), preferably with a scan rate that corresponds to the network frequency or integral multiples of the network frequency divided by the number of pole pairs of the generator.
- ADC analog-to-digital converter
- the corresponding signal can be examined in the analysis unit with reference to frequency modulations and / or amplitude modulations and / or frequency lines contained therein, in particular in the baseband. Transient processes in the spectrum can also be evaluated.
- the signals are advantageously evaluated using a Fourier transformation.
- the signal is usually sampled at a sampling rate of 1-200 kHz, in particular for the low-frequency components in the range of 5 kHz, and for the high-frequency components in the range of 200 kHz.
- sections in the range from 0.5k to 1000k data points, in particular in the range from 64k data points are Fourier-transformed for the determination of fine structures of the signal.
- a grounding unit (driving end module) is provided at the first location, which has a high-resistance to the contact device on the shaft and a low-resistance to earth, parallel to the high-resistance Resistor a fuse is arranged, and in particular a measuring resistor is preferably arranged between earth and low-resistance, the shaft voltage between high-resistance and contact device and ground connection, and the shaft current is tapped across the measuring resistor.
- the measuring unit is preferably configured as follows. It has a fuse for Contact device to the shaft and via one or more capacitors arranged in parallel and in parallel to this via a resistance to earth.
- a measuring resistor is arranged between earth and capacitance or resistor, the shaft voltage between fuse and earth connection and the shaft current being tapped across the measuring resistor. This type of measurement allows for trouble-free observation, which is safeguarded against voltage peaks and current peaks due to the existing fuses.
- the present invention relates to a method for monitoring and / or analyzing electrical machines in operation, the electrical machine comprising at least one generator with a shaft and drive means for driving this shaft, the shaft being grounded at the first side of the generator with low resistance and wherein a measuring unit for measuring shaft voltage and / or shaft current as a function of time is provided on the shaft on the second side of the generator. Signals from wave voltage and / or wave current are fed to an analysis unit, and a combined and simultaneous analysis is carried out in the analysis unit with regard to at least two potential fault states of the electrical machine. These are preferably the fault states mentioned further above, and the method is preferably carried out using a device as described above.
- the single figure shows a schematic representation of a device for measuring wave voltage URC (I) and / or U DE (I) or wave current I RC (t) and / or IDEO as a function of time (t).
- the figure shows a schematic representation of a gas turbine system, in which two turbines 1 are arranged on the two sides of a generator 4 as drive means, the two turbines 1 and the generator 4 being arranged on a common shaft 2 or a shaft train.
- the two turbines are only to be understood as examples, it is also possible for only one turbine to be arranged.
- To the generator 4 e.g. To be able to disconnect from the turbines 1 when starting up, couplings are usually provided which allow the turbines 1 to be mechanically decoupled from the generator 4.
- the shaft 2 is supported on at least two shaft bearings 3.
- the oil films present in the bearings 3 electrically isolate the shaft 2 from the bearings 3 which are connected to the earth. However, this insulation can break down at voltage peaks above a certain height, which can lead to problems with electrical erosion (spark erosion of the shaft).
- the wave voltages or wave currents come, among other things, due to magnetic asymmetries in the area surrounding the shaft 2, due to electrostatic charges on the shaft 2, due to external electrical fields which capacitively couple the shaft voltages into the shaft 2, or due to magnetic remanence in the rotating shaft 2, and due to residual magnetization (due to production) of shaft 2.
- the wave voltages hereinafter referred to as U (t)
- wave currents hereinafter referred to as l (t)
- the shaft voltage or the shaft current is used for the targeted analysis and detection of various fault states of an electrical machine.
- a low-resistance grounding unit e.g. a so-called DE module 5 (Driving End Module) connected to the shaft 2, which essentially ensures a secure low-resistance grounding of the shaft 2.
- DE module 5 is connected to the analysis unit 7.
- a higher-impedance grounding device On the other side of the generator 4, a so-called RC module 6 (R for resistance, C for.), Is used as the measuring unit for measuring shaft voltage (U RC O) and / or shaft current (IR C OO) as a function of time Capacitance), which is connected to the analysis unit 7, on the one hand connected to the shaft 2 and on the other hand connected to the grounding point 9.
- RC module 6 R for resistance, C for.
- Is used as the measuring unit for measuring shaft voltage (U RC O) and / or shaft current (IR C OO) as a function of time Capacitance) as a function of time Capacitance
- the DE module 5 is connected to the shaft 2 via a contact device 10.
- the contact device 10 is preferably a copper braid which is in sliding contact with the shaft 2.
- the DE module 5 is designed with a low resistance to the earthing point 8, in that a high-resistance resistor 12 is first connected between the contact device 10 and the earthing point 8 and a fuse 14 is connected in parallel with this high-resistance resistor 12. This is to prevent excessive currents from occurring.
- the DE module 5 thus initially ensures low-resistance grounding of the shaft 2.
- a low-resistance resistor 13 is connected in series with this high-resistance resistor 12 or with fuse 14 to ground.
- the resistor 13 typically has a value R in the range from 1 to 10 ohms.
- a capacitor 17 with a capacitance C in the range from 3 to 10 ⁇ F is arranged in parallel with the low-resistance resistor. Otherwise there is a risk that such voltage peaks will be reduced over the bearing shells and lead to sparking there.
- the wave voltage U D ⁇ (t) is tapped as a function of time and transferred to the analysis unit 7 via a coaxial cable 19.
- the RC module 6 is usually arranged on the other side of the generator 4 in order to derive voltage peaks. This also has a contact device 11 for shaft 2, which in turn is preferably in the form of a copper braid which is in electrical contact with shaft 2.
- the RC module 6 initially has a fuse 15 for the shaft, usually a type 2AT fuse (here too, the fuse serves to protect against high currents), and in series a resistor 16, to which a capacitor 17 designed as a capacitor is connected in parallel is arranged.
- the resistor 16 arranged parallel to the capacitor 17 has a value R in the range from 100 to 10,000 ohms, preferably from 400 to 1000 ohms.
- the capacitance 17 typically has a value C in the range from 1 to 30 ⁇ F.
- the wave voltage U RC (t) is now tapped as a function of time between the fuse 15 and the grounding point 9 and is transferred to the analysis unit 7 via a coaxial cable 20. Between the grounding point 9 and the parallel arrangement of resistor 16 and capacitor 17 there is also again a measuring resistor 18 (shunt resistance), in which the wave current I R c (t) can be calculated and recorded via the voltage drop occurring above it. This information is also transferred to the analysis unit 7 via the coaxial cable 20.
- An error condition leads to a low-frequency signal in the range of less than 1 kHz. Similar to the short-circuit of the rotor winding, characteristic multiples of the mains frequency are visible if the rotor winding is faulty insulated. At a mains frequency of 50 Hz, special bands are observed at 300 Hz, 600 Hz, 900 Hz, etc., correspondingly at a 6-pulse voltage bands at 150 Hz, 300 Hz, etc.
- the signals observed via the wave voltage or wave current are signals which are analogous to those described in US Pat. No. 4,814,699 mentioned at the beginning.
- oscillations are changes in the rotational speed of the rotor around the actual nominal frequency. They come about, for example, when faults occur in the network, which is usually operated at 50 or 60 Hz, which couple into the movement of the rotor and, for example, slow it down. This leads to an oscillation of the rotor frequency around the nominal frequency, which can be critical, in particular, if this oscillation is a natural frequency of the system, since then an oscillation is possible.
- Torsional vibrations occur, for example, when there is a sudden increase in load on the network and the generator is braked to a certain extent by this increase in load (which of course also causes oscillations again).
- wave current and wave voltage allows the diagnosis of all three movement types I, II and III.
- frequency demodulation methods can be used, which are insensitive to amplitude fluctuations.
- Amplitude demodulation methods can be used to measure bending vibrations (type I).
- a large number of harmonics of the wave signal can be used.
- Bending vibrations (type I) are expressed in the corresponding spectrum on the one hand as sidebands of the wave voltage / current harmonics, the sidebands being spaced apart by the modulation frequency.
- the modulation frequency can be approximately 1 to 300 Hz, and these modulations both on the fundamental harmonic of the wave voltage / wave current, as well is visible on the corresponding harmonics.
- Bending vibrations are possible by simply viewing or analyzing lines or their sidebands. This analysis is visually possible but also automated.
- bending vibrations are also expressed as frequency lines in the baseband, ie "sidebands" around 0 Hz.
- Pendulum vibrations type II usually take place around the basic frequency of the rotor. These are rapid changes in the rotation frequency, ie changes on a time scale of less than 1 second.
- Torsional vibrations (type III) lead to fine structures in the spectrum due to the usually high frequencies. Torsional vibrations are usually in the range of 100 to 200 Hz and lead to very rapid frequency shifts or phase shifts on this time scale. These can also be recognized and analyzed visually or automatically in the spectrum.
- Such chatter marks occur when e.g. the bearing shell brushes.
- Grazing points are understood to be electrical grazing points. These error states are expressed in signals in the low-frequency as well as in the high-frequency range. Streif sites are e.g. observed in the low-frequency range, but periodic sparks can also be observed in certain areas in the high-frequency range.
- Some algorithms use signals from both the low-frequency and the high-frequency signal range (eg for detection of grazing points, isolation of the shaft).
- some algorithms also use the results of the other measurement algorithms and relate them to one another in order to increase the meaningfulness of the diagnosis.
- the (simultaneous) combination of several measurement methods achieves better and more meaningful results than by the summation of all individual methods alone. The following specific combinations should serve as examples:
- the actual analysis unit 7 comprises two input stages, a high-frequency input stage 23 and a low-frequency input stage 24.
- the high-frequency input stage 23 consists of a high-frequency bandpass (receiving band steeply flanked and from approx. 20 kHz to the MHz range, preferably in the frequency range adjustable).
- This bandpass filter 23 implemented for example via a frequency-selective amplifier, separates interference signals (eg thyristor pulses) from useful signals (eg signals from sparks).
- Useful signals in the pass band are detected, interference signals in the filter's blocking range are suppressed. For example, this uses the knowledge that the thyristor switching signals are rather low-frequency in comparison to the spark signals of the brush fire. In general, different phenomena can be distinguished from one another by reception in different frequency bands.
- the low-frequency input stage 24 is designed for frequencies up to approx. 20 kHz. Again, it can be a passive low pass or a selectively low frequency amplifier. The low-frequency signals are thus processed.
- the signals of the input stages are then transferred to a combined analysis unit 22.
- the evaluation with the aid of a Fourier transform of the time signal U R C (I) or U D ⁇ (t) or I RC (t) or I D E (L) has proven particularly suitable for the analysis in the frequency domain.
- the corresponding time signal can be mixed with a carrier signal or with the corresponding carrier signal shifted by ⁇ / 2 in the sense of a quadrature detection and stored in a separate real or imaginary part and Fourier transform (FFT).
- a suitable carrier signal is, for example, the network frequency or its integer multiples, which can optionally be tapped directly from the network or at a suitable other location or generated locally.
- the incoming signal U R c (t) or U DE O (typically in the range of less than 15 V) or I RC (t) or IDEO) is initially in an analog-digital converter (ADC) with a sampling rate of typically 5 kHz (low frequency Signals from the low-frequency input stage 24) or 200 kHz (high-frequency signals from the high-frequency input stage 23) are digitized and then this digitized time signal U d ⁇ g (t) or l d ⁇ g (t) is Fourier-transformed in sections.
- ADC analog-digital converter
- U d ⁇ g (t) or l d ⁇ g (t) is Fourier-transformed in sections.
- the Fourier transformation of one window each of, for example, 64k data points proves to be useful.
- a window of 1 k data points is usually sufficient, since the corresponding spectral features are of a substantially coarser nature.
- the signal can also be sampled at a sampling rate that corresponds to the grid frequency or an integer multiple of the grid frequency divided by the number of pole pairs of the generator (grid phase-synchronous analysis). This causes a frequency shift by exactly this sampling frequency. For example, rotationally synchronous chatter marks or grazing points can be detected particularly easily.
- the measurement on the shaft is carried out with partial discharge measurements on the phase terminals, as are e.g. in US 4,814,699, combined. This makes it possible to distinguish pulses from partial discharges in the stator winding from spark activities on the shaft, or to supplement the partial discharge measurement.
- signals tapped directly at the slip ring brushes are analyzed with respect to high-frequency and low-frequency signals and are also evaluated by means of combining algorithms together with the data obtained from shaft voltage or wave current.
- a great advantage of coupling directly to the shaft is that the measurement of all spark activities on the shaft, e.g. Discharges over the bearing shells, is possible.
- the measurement on both sides of the generator 4 also allows a good localization of the phenomena that occur.
- the present method is particularly suitable for long-term observation of the behavior of shaft strands Suitable, because the device effort is relatively small and the sensor, ie the shaft, is always available. The gradual, slow change in the fault status of an electrical machine can be used to determine whether there is a need for revision, and appropriate revisions can be planned and carried out in a targeted manner.
- High frequency bandpass high frequency input stage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03753593A EP1537427B1 (de) | 2002-09-10 | 2003-09-05 | Vorrichtung und verfahren zur überwachung und/oder analyse von elektrischen maschinen im betrieb |
AU2003271761A AU2003271761A1 (en) | 2002-09-10 | 2003-09-05 | Device and method for monitoring and/or analyzing electric machines in operation |
DE50310287T DE50310287D1 (de) | 2002-09-10 | 2003-09-05 | Vorrichtung und verfahren zur überwachung und/oder analyse von elektrischen maschinen im betrieb |
JP2004535534A JP2005538371A (ja) | 2002-09-10 | 2003-09-05 | 動作中に電気機械を監視および/または分析するための装置および方法 |
CA2498060A CA2498060C (en) | 2002-09-10 | 2003-09-05 | Apparatus and method for monitoring and/or analysis of electrical machines during operation |
US11/075,523 US7102379B2 (en) | 2002-09-10 | 2005-03-09 | Apparatus and method for monitoring and/or analysis of electrical machines during operation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH20021531/02 | 2002-09-10 | ||
CH15312002 | 2002-09-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/075,523 Continuation US7102379B2 (en) | 2002-09-10 | 2005-03-09 | Apparatus and method for monitoring and/or analysis of electrical machines during operation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004025316A1 true WO2004025316A1 (de) | 2004-03-25 |
Family
ID=31983659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/050611 WO2004025316A1 (de) | 2002-09-10 | 2003-09-05 | Vorrichtung und verfahren zur überwachung und/oder analyse von elektrischen maschinen im betrieb |
Country Status (8)
Country | Link |
---|---|
US (1) | US7102379B2 (de) |
EP (1) | EP1537427B1 (de) |
JP (1) | JP2005538371A (de) |
CN (1) | CN100476449C (de) |
AU (1) | AU2003271761A1 (de) |
CA (1) | CA2498060C (de) |
DE (1) | DE50310287D1 (de) |
WO (1) | WO2004025316A1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1643259A1 (de) * | 2004-08-12 | 2006-04-05 | ALSTOM Technology Ltd | Verfahren und Vorrichtung zur Detektion von Streifstellen an rotierenden Maschinen |
DE102005027670A1 (de) * | 2005-06-15 | 2007-01-11 | Siemens Ag | Anordnung und Verfahren zur Lagerstromüberwachung eines Elektromotors |
WO2009071656A1 (de) * | 2007-12-07 | 2009-06-11 | Alstom Technology Ltd | Verfahren zur überwachung des wellenstromes und/oder der isolation der welle von elektromaschinen sowie vorrichtung zur durchführung des verfahrens |
US7592722B2 (en) | 2005-03-04 | 2009-09-22 | Alstom Technology Ltd | Gas-cooled generator |
WO2013013739A1 (de) * | 2011-07-27 | 2013-01-31 | Voith Patent Gmbh | Überwachungsvorrichtung für eine doppelgespeiste asynchronmaschine |
RU2560864C2 (ru) * | 2012-07-25 | 2015-08-20 | Альстом Текнолоджи Лтд | Способ мониторинга машин с вращающимися валами |
EP1996815B2 (de) † | 2006-03-17 | 2024-02-14 | Vestas Wind Systems A/S | Windturbine mit einem schutzsystem für einen stromgenerator, und deren verwendung |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7649470B2 (en) * | 2002-09-10 | 2010-01-19 | Alstom Technology Ltd. | Method and apparatus for detection of brush sparking and spark erosion on electrical machines |
US7064556B2 (en) * | 2004-05-04 | 2006-06-20 | General Electric Co. | Frequency rectification tool for shorter waveforms |
US7952360B2 (en) * | 2007-03-14 | 2011-05-31 | General Electric Company | Method and system for passively detecting and locating wire harness defects |
US7856224B2 (en) * | 2005-03-31 | 2010-12-21 | General Electric Company | Systems and methods for recovering a signal of interest from a complex signal |
WO2008006655A1 (de) * | 2006-07-13 | 2008-01-17 | Alstom Technology Ltd | Verfahren und vorrichtung zur detektion von interlaminaren kurzschlüssen |
KR101026080B1 (ko) | 2007-07-26 | 2011-03-31 | 박래웅 | 케이블 이상유무 감지시스템 |
WO2009071438A1 (de) * | 2007-12-07 | 2009-06-11 | Alstom Technology Ltd | Verfahren zur detektion von interlaminaren blechschlüssen im stator-blechpaket von elektromaschinen |
WO2009144061A2 (de) * | 2008-04-15 | 2009-12-03 | Alstom Technology Ltd | Verfahren zur überwachung einer elektrodynamischen maschine |
CA2747702C (en) * | 2008-12-19 | 2018-02-27 | Eskom Holdings Soc Limited | Rotating machine shaft signal monitoring method and system |
TWI391685B (zh) * | 2009-10-16 | 2013-04-01 | Ind Tech Res Inst | 繞線製品檢測機台及其層間短路之檢測方法 |
FR2953289B1 (fr) * | 2009-11-30 | 2012-04-27 | Snecma | Procede et dispositif de surveillance de vibrations en torsion d'un arbre rotatif d'une turbomachine. |
BR112012021890A2 (pt) * | 2010-03-01 | 2016-05-24 | Siemens Ag | máquina elétrica para a qual a função de aterramento é monitorada e método |
US8222760B2 (en) * | 2010-06-29 | 2012-07-17 | General Electric Company | Method for controlling a proximity sensor of a wind turbine |
US8643985B2 (en) * | 2010-07-23 | 2014-02-04 | Schneider Electric Solar Inverters Usa, Inc. | Photovoltaic bipolar to monopolar source circuit converter with frequency selective grounding |
EP2420849B1 (de) | 2010-08-20 | 2019-10-23 | General Electric Technology GmbH | Rogowski-Spulen-Anordnung |
DE102010064016A1 (de) * | 2010-12-23 | 2012-06-28 | Siemens Aktiengesellschaft | Elektrische Maschine, Schienenfahrzeug und schienengebundene Wagengarnitur |
AU2010366614B2 (en) * | 2010-12-30 | 2016-07-21 | Prysmian S.P.A. | Locating of partial-discharge-generating faults |
US9075115B2 (en) * | 2011-08-31 | 2015-07-07 | General Electric Company | Systems and methods for monitoring the health of an electrical system |
CN103176125A (zh) * | 2011-12-26 | 2013-06-26 | 哈尔滨瑞格大电机技术有限公司 | 电机多功能电刷信号监测器 |
US9541606B2 (en) | 2012-12-17 | 2017-01-10 | General Electric Company | Fault detection system and associated method |
US9899942B2 (en) | 2013-06-25 | 2018-02-20 | Siemens Energy, Inc. | Using static excitation system to reduce the amplitude of torsional oscillations due to fluctuating industrial loads |
WO2015043619A1 (de) * | 2013-09-24 | 2015-04-02 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zur zustandsüberwachung eines eine elektrische antriebseinheit umfassenden antriebssystems |
CN103698703B (zh) * | 2014-01-08 | 2016-03-23 | 中煤能源黑龙江煤化工有限公司 | 直流电机电枢故障检测装置 |
DE102014204922A1 (de) * | 2014-03-17 | 2015-09-17 | Robert Bosch Gmbh | System, insbesondere Batteriesystem, mit Potentialausgleichselement |
EP3154173A1 (de) | 2015-10-08 | 2017-04-12 | ABB Schweiz AG | Elektrische maschine mit einer aktiven erdung |
ES2613902B1 (es) * | 2015-11-26 | 2018-03-14 | Gamesa Innovation & Technology, S.L. | Método y sistemas de monitorización en tiempo real del estado del aislamiento de los devanados de generadores eólicos |
US10371726B2 (en) | 2016-01-11 | 2019-08-06 | Cutsforth, Inc. | Monitoring system for grounding apparatus |
KR102097510B1 (ko) * | 2016-06-21 | 2020-04-06 | 미쓰비시덴키 가부시키가이샤 | 부하의 이상 검출 장치 |
US9991832B2 (en) * | 2016-08-04 | 2018-06-05 | Infineon Technologies Ag | Detecting brushfire in power systems |
US10495693B2 (en) | 2017-06-01 | 2019-12-03 | General Electric Company | Wind turbine fault detection using acoustic, vibration, and electrical signals |
EP3635421A1 (de) | 2017-06-05 | 2020-04-15 | Cutsforth Inc. | Überwachungssystem für erdungsvorrichtung |
KR101897753B1 (ko) | 2018-04-24 | 2018-09-12 | 고진호 | 모터의 테스트 장치 |
US10942203B2 (en) * | 2018-06-20 | 2021-03-09 | Helwig Carbon Products, Inc. | Voltage probe configured to measure voltage on a mechanical device before and after discharging voltage from the mechanical device |
CN109596978B (zh) * | 2018-10-30 | 2020-10-20 | 新疆舰目摩托车有限公司 | 一种新能源电机模拟测试线 |
FR3088439B1 (fr) * | 2018-11-12 | 2020-11-13 | Electricite De France | Detection de defaut electrique dans une generatrice |
JP7302703B2 (ja) * | 2019-03-08 | 2023-07-04 | 株式会社明電舎 | オンライン部分放電測定装置に使用される結合コンデンサ |
JP7225941B2 (ja) * | 2019-03-08 | 2023-02-21 | 株式会社明電舎 | オンライン部分放電測定装置及びこれに使用される結合コンデンサ |
CN109974831A (zh) * | 2019-04-10 | 2019-07-05 | 南京研旭电气科技有限公司 | 一种含时变间谐波扭振信号发生器 |
NO20211509A1 (en) | 2019-05-22 | 2021-12-15 | Baker Hughes Oilfield Operations Llc | Dual turbine power and wellbore communications apparatus |
JP7533388B2 (ja) | 2021-07-09 | 2024-08-14 | トヨタ自動車株式会社 | トルク推定方法、トルク推定装置、及びトルク推定プログラム |
CN117420395B (zh) * | 2023-09-27 | 2024-07-09 | 深圳电气科学研究院 | 变频驱动系统轴电压火花放电点燃危险检测装置及方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3934459A (en) * | 1974-10-10 | 1976-01-27 | General Electric Company | Torque monitoring system for rotating shaft |
EP0271678A1 (de) * | 1986-11-19 | 1988-06-22 | BBC Brown Boveri AG | Anordnung zum Reduzieren der Wellenspannungen an dynamoelektrischen Maschinen |
US4814699A (en) * | 1985-12-12 | 1989-03-21 | Siemens Aktiengesellschaft | Method for partial discharge detection and breaking spark measuring in dynamo-electric high-voltage machines, and an apparatus for performing the method |
US5006769A (en) * | 1989-04-05 | 1991-04-09 | Asea Brown Boveri Ltd. | Arrangement for detecting winding shorts in the rotor winding of electrical machines |
WO2000069062A1 (en) * | 1999-05-06 | 2000-11-16 | Nippes Paul I | Shaft voltage and current monitoring system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653019A (en) * | 1970-07-28 | 1972-03-28 | Gen Electric | Signal monitoring system |
US3885420A (en) * | 1974-03-06 | 1975-05-27 | Gen Electric | Method and apparatus for measuring small variations in the speed of rotating shafts |
US4058804A (en) * | 1976-03-11 | 1977-11-15 | General Electric Company | Signal monitoring system |
US4148222A (en) * | 1977-12-22 | 1979-04-10 | General Electric Company | Apparatus and method for measuring torsional vibration |
US4137780A (en) * | 1978-02-06 | 1979-02-06 | General Electric Company | Apparatus for monitoring phase currents and torsional vibrations of a turbine-generator |
US4163227A (en) * | 1978-05-01 | 1979-07-31 | General Electric Company | Apparatus for monitoring arcing of brushes in a dynamoelectric machine |
US4317371A (en) * | 1980-07-30 | 1982-03-02 | General Electric Company | Torsional vibration monitor |
JPS5812556A (ja) * | 1981-07-14 | 1983-01-24 | Hitachi Ltd | 集電装置の火花監視装置 |
US4451786A (en) * | 1982-03-01 | 1984-05-29 | General Electric Company | High sensitivity brush arcing monitor for a dynamoelectric machine |
US4444064A (en) * | 1982-06-14 | 1984-04-24 | General Electric Company | Electromagnetic torque measuring instrumentation for a rotating shaft |
US6091236A (en) * | 1997-04-28 | 2000-07-18 | Csi Technology, Inc. | System and method for measuring and analyzing electrical signals on the shaft of a machine |
DE19742622A1 (de) | 1997-09-26 | 1999-04-08 | Siemens Ag | Verfahren und Vorrichtung zur Überwachung von Wellenströmen und Wellenspannungen in einer Generatorwelle |
-
2003
- 2003-09-05 EP EP03753593A patent/EP1537427B1/de not_active Expired - Lifetime
- 2003-09-05 CN CNB038249499A patent/CN100476449C/zh not_active Expired - Fee Related
- 2003-09-05 DE DE50310287T patent/DE50310287D1/de not_active Expired - Lifetime
- 2003-09-05 CA CA2498060A patent/CA2498060C/en not_active Expired - Lifetime
- 2003-09-05 JP JP2004535534A patent/JP2005538371A/ja not_active Withdrawn
- 2003-09-05 WO PCT/EP2003/050611 patent/WO2004025316A1/de active IP Right Grant
- 2003-09-05 AU AU2003271761A patent/AU2003271761A1/en not_active Abandoned
-
2005
- 2005-03-09 US US11/075,523 patent/US7102379B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3934459A (en) * | 1974-10-10 | 1976-01-27 | General Electric Company | Torque monitoring system for rotating shaft |
US4814699A (en) * | 1985-12-12 | 1989-03-21 | Siemens Aktiengesellschaft | Method for partial discharge detection and breaking spark measuring in dynamo-electric high-voltage machines, and an apparatus for performing the method |
EP0271678A1 (de) * | 1986-11-19 | 1988-06-22 | BBC Brown Boveri AG | Anordnung zum Reduzieren der Wellenspannungen an dynamoelektrischen Maschinen |
US5006769A (en) * | 1989-04-05 | 1991-04-09 | Asea Brown Boveri Ltd. | Arrangement for detecting winding shorts in the rotor winding of electrical machines |
WO2000069062A1 (en) * | 1999-05-06 | 2000-11-16 | Nippes Paul I | Shaft voltage and current monitoring system |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1643259A1 (de) * | 2004-08-12 | 2006-04-05 | ALSTOM Technology Ltd | Verfahren und Vorrichtung zur Detektion von Streifstellen an rotierenden Maschinen |
US7212010B2 (en) | 2004-08-12 | 2007-05-01 | Alstom Technology Ltd. | Method and device for detecting a contact point on a shaft of a rotating machine |
CH697269B1 (de) * | 2004-08-12 | 2008-07-31 | Alstom Technology Ltd | Verfahren und Vorrichtung zur Detektion von Streifstellen an rotierenden Maschinen. |
US7592722B2 (en) | 2005-03-04 | 2009-09-22 | Alstom Technology Ltd | Gas-cooled generator |
DE102005027670A1 (de) * | 2005-06-15 | 2007-01-11 | Siemens Ag | Anordnung und Verfahren zur Lagerstromüberwachung eines Elektromotors |
EP1996815B2 (de) † | 2006-03-17 | 2024-02-14 | Vestas Wind Systems A/S | Windturbine mit einem schutzsystem für einen stromgenerator, und deren verwendung |
WO2009071656A1 (de) * | 2007-12-07 | 2009-06-11 | Alstom Technology Ltd | Verfahren zur überwachung des wellenstromes und/oder der isolation der welle von elektromaschinen sowie vorrichtung zur durchführung des verfahrens |
US8396677B2 (en) | 2007-12-07 | 2013-03-12 | Alstom Technology Ltd. | Method for monitoring the shaft current and/or the insulation of the shaft of electric machines and device for performing the method |
WO2013013739A1 (de) * | 2011-07-27 | 2013-01-31 | Voith Patent Gmbh | Überwachungsvorrichtung für eine doppelgespeiste asynchronmaschine |
RU2560864C2 (ru) * | 2012-07-25 | 2015-08-20 | Альстом Текнолоджи Лтд | Способ мониторинга машин с вращающимися валами |
Also Published As
Publication number | Publication date |
---|---|
CA2498060C (en) | 2012-03-06 |
EP1537427B1 (de) | 2008-08-06 |
JP2005538371A (ja) | 2005-12-15 |
CN1695064A (zh) | 2005-11-09 |
CA2498060A1 (en) | 2004-03-25 |
DE50310287D1 (de) | 2008-09-18 |
US20050200378A1 (en) | 2005-09-15 |
AU2003271761A1 (en) | 2004-04-30 |
US7102379B2 (en) | 2006-09-05 |
EP1537427A1 (de) | 2005-06-08 |
CN100476449C (zh) | 2009-04-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1537427B1 (de) | Vorrichtung und verfahren zur überwachung und/oder analyse von elektrischen maschinen im betrieb | |
EP1537390B1 (de) | Verfahren zur erfassung von schwingungen des wellenstranges an einer elektrischen maschine | |
EP2217938B1 (de) | Verfahren zur überwachung des wellenstromes und/oder der isolation der welle von elektromaschinen | |
EP1537428B1 (de) | Verfahren und vorrichtung zur erfassung von bürstenfeuer und funkenerosion an elektrischen maschinen | |
EP2340608B1 (de) | Vorrichtung und verfahren zur überwachung und/oder analyse von rotoren von elektrischen maschinen im betrieb | |
EP0642027B1 (de) | Verfahren und Vorrichtung zur Erfassung von Erdfehlern auf den Leitern einer elektrischen Maschine | |
EP0391181B1 (de) | Anordnung zum Detektieren von Windungsschlüssen in der Rotorwicklung elektrischer Maschinen | |
EP0241764B1 (de) | Verfahren und Vorrichtungen zur Erkennung und Lokalisierung von Schäden in elektrischen Anlagen | |
EP2041591B1 (de) | Verfahren und vorrichtung zur detektion von interlaminaren kurzschlüssen | |
DE3888751T2 (de) | Verfahren zur Bestimmung des Isolationszustandes. | |
EP2230522B1 (de) | Verfahren und Vorrichtung zur Isolationsüberwachung eines Netzes ohne Neutralleiter | |
EP2204660B1 (de) | Vorrichtung und verfahren zum bestimmen von teilentladungen an einer elektrischen komponente | |
EP2630509B1 (de) | Überwachung und fehlerdiagnose einer elektrischen maschine | |
EP2880454B1 (de) | Verteilte ableit- und fehlerstromerfassung sowie stringfehlererkennung | |
EP0228613A1 (de) | Verfahren zur Teilentladungserfassung und Abreissfunkenmessung bei dynamoelektrischen Hochspannungsmaschinen sowie Einrichtung zu seiner Durchführung | |
DE102018114540B3 (de) | Verfahren zur Erkennung von Lichtbögen in Gleichstromkreisen | |
EP1643259A1 (de) | Verfahren und Vorrichtung zur Detektion von Streifstellen an rotierenden Maschinen | |
WO1999017126A1 (de) | Verfahren und vorrichtung zur überwachung von wellenströmen oder wellenspannungen in einer generatorwelle | |
DE2944521A1 (de) | Schutzrelaiseinrichtung | |
DE69832980T2 (de) | Mess-Schaltkreis | |
DE19736316A1 (de) | Vorrichtung und Verfahren zur Drehzahlüberwachung für einen Anodenantrieb von einer Röntgenröhre | |
WO2011023296A1 (de) | Überwachungssystem für leistungstransformatoren und überwachungsverfahren | |
DE3918116C2 (de) | ||
WO2003044545A1 (de) | Verfahren zum detektieren eines in einer elektrischen ein-richtung in der nähe eines neutralen punktes auftretenden erdschlusses sowie vorrichtung zur durchführung und anwendung des verfahrens | |
DE19932611A1 (de) | Verfahren und Vorrichtung zur Messung von Teilentladungssignalen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003753593 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2498060 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11075523 Country of ref document: US Ref document number: 2004535534 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20038249499 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2003753593 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 2003753593 Country of ref document: EP |