CN106959158A - A kind of pump-storage generator vibration monitoring method and monitoring system - Google Patents
A kind of pump-storage generator vibration monitoring method and monitoring system Download PDFInfo
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Abstract
The invention discloses a kind of pump-storage generator vibration monitoring method and monitoring system, this method is to gather pump-storage generator in the vibration displacement signal and vibration velocity signal in the middle part of the direction of principal axis of upper spider three, the direction of principal axis of lower bearing bracket three, stator on horizontal direction, stator upper vertical direction and the direction of principal axis of top cover three, then calculates and obtains vibration displacement time domain parameter, vibration displacement frequency domain parameter, vibration velocity time domain parameter and vibration velocity frequency domain parameter；With reference to acquisition Faults by Vibrating P after parameters；The monitoring system includes computer (1) and data collecting card (2)；11 displacement type low-frequency velocity sensors (5) and 11 velocity profile low-frequency velocity sensors (6) are connected to by the first signal conditioner (3) and secondary signal conditioner (4) on data collecting card (2).The present invention can not only improve the degree of accuracy of vibration monitoring, additionally it is possible to reduce unit and break down in vibration monitoring is carried out to pump-storage generator.
Description
Technical field
The present invention relates to a kind of pump-storage generator vibration monitoring method and monitoring system, particularly a kind of water-storage electricity
The unit vibration monitoring method and monitoring system stood.
Background technology
By the end of the end of the year 2016, Wind Power In China adds up installation amount and reaches 1.69 hundred million kilowatts, accounts for the accumulative installation of global wind-powered electricity generation
34.7%, it is global the first big country of wind-powered electricity generation installation.With substantial amounts of wind-powered electricity generation, nuclear power equal energy source it is grid-connected, hydroenergy storage station
Adjustment effect is more and more important, and the start and stop of pump-storage generator, varying duty are more frequent so that unit is easier occur event
Barrier.To ensure the safe and stable operation of unit, it is necessary to deeply study unit vibration characteristic, entered according to unit vibration characteristic
Row unit is adjusted.
But, due to the operating condition that pump-storage generator is complicated, its vibration characteristics is than conventional turbine-generator units more
Complexity, causes existing vibration monitoring method accurately can not comprehensively monitor the indeed vibrations situation of pump-storage generator (i.e.
Running status), the degree of accuracy of vibration monitoring is undesirable；And then lead to not adjust pump-storage generator well, cause unit
It is easier to break down.Therefore, to there is the vibration monitoring degree of accuracy undesirable for the vibration monitoring method of existing pump-storage generator
The problem of being easier to break down with unit.
The content of the invention
It is an object of the present invention to provide a kind of pump-storage generator vibration monitoring method and monitoring system.The present invention exists
Pump-storage generator is carried out in vibration monitoring, the degree of accuracy of vibration monitoring can not only be improved, additionally it is possible to reduce unit
The situation of failure.
Technical scheme：A kind of pump-storage generator vibration monitoring method, comprises the following steps：
A, collection pump-storage generator are in the middle part of the direction of principal axis of XYZ tri-, the direction of principal axis of XYZ tri- of lower bearing bracket, stator of upper spider
Vibration displacement signal and vibration velocity signal on the direction of principal axis of XYZ tri- of horizontal direction, stator upper vertical direction and top cover, often
Individual collection direction is used as a measuring point；
B, the vibration displacement signal of change collected according to each measuring point obtain the vibration displacement time domain parameter of each measuring point
With vibration displacement frequency domain parameter；
C, the vibration velocity signal of change collected according to each measuring point obtain the vibration velocity time domain parameter of each measuring point
With vibration velocity frequency domain parameter；
D, the vibration displacement time domain parameter with reference to each measuring point, vibration displacement frequency domain parameter, vibration velocity time domain parameter and
Vibration velocity frequency domain parameter, obtains the Faults by Vibrating P of each measuring point.
In a kind of foregoing pump-storage generator vibration monitoring method, the vibration displacement time domain parameter in the step b is
V0, V0Equal to the peak-to-peak value of vibration displacement signal；Vibration displacement frequency domain parameter in the step b is V1, first vibration displacement is believed
Number the frequency spectrum that vibration displacement signal sequence signal is tried to achieve after DFT is done, choose preceding 5 masters maximum in the frequency spectrum
Frequency value is used as vibration displacement frequency domain parameter, i.e. V1=[(f1, F1), (f2, F2), (f3, F3), (f4, F4), (f5, F5)], wherein (i=
1,2,3,4,5) fiFor the corresponding frequency of preceding 5 maximum amplitudes, F in frequency spectrumiFor preceding 5 maximum amplitudes in frequency spectrum, and F1>F2>
F3>F4>F5。
In a kind of foregoing pump-storage generator vibration monitoring method, the vibration velocity time domain parameter in the step c is
H0, H0Equal to the virtual value of vibration velocity signal；Vibration velocity frequency domain parameter in the step c is H1, first vibration velocity is believed
Number the frequency spectrum that vibration velocity signal sequence signal is tried to achieve after DFT is done, choose preceding 5 masters maximum in the frequency spectrum
Frequency value is used as vibration velocity signal frequency domain parameter, i.e. H1=[(a1, A1), (a2, A2), (a3, A3), (a4, A4), (a5, A5)], wherein
The a of (i=1,2,3,4,5)iFor the corresponding frequency of preceding 5 maximum amplitudes, A in frequency spectrumiFor preceding 5 maximum amplitudes in spectrogram, and
A1>A2>A3>A4>A5。
In a kind of foregoing pump-storage generator vibration monitoring method, the Faults by Vibrating P=[V in the step d0,
H0, V1, H1]。
According to the monitoring system constructed by a kind of foregoing pump-storage generator vibration monitoring method, including computer, meter
Data collecting card is connected with calculation machine；The first signal conditioner and secondary signal conditioner, first are connected with data collecting card
It is connected with 11 displacement type low-frequency velocity sensors, secondary signal conditioner that to be connected with 11 velocity profiles low on signal conditioner
Frequency velocity sensor；11 displacement types low-frequency velocity sensor is respectively arranged at the XYZ of the upper spider of pump-storage generator
Three direction of principal axis, the direction of principal axis of XYZ tri- of lower bearing bracket, in the middle part of stator horizontal direction, stator upper vertical direction and top cover the axles of XYZ tri-
On direction, the set location of 11 velocity profile low-frequency velocity sensors and the set location of 11 displacement type low-frequency velocity sensors
It is identical.
In foregoing monitoring system, speed probe is also associated with the data collecting card, speed probe is arranged at
On the main shaft of pump-storage generator.
In foregoing monitoring system, the unit monitoring system of pump-storage generator is also associated with the data collecting card.
In foregoing monitoring system, the displacement type low-frequency velocity sensor is fast for the inertia-type displacement type low frequency of contact
Spend sensor.
In foregoing monitoring system, velocity profile low-frequency velocity sensor passes for the inertia-type velocity profile low-frequency velocity of contact
Sensor.
In foregoing monitoring system, the speed probe is contactless speed probe.
Compared with prior art, the present invention devises a kind of pump-storage generator vibration monitoring method and monitoring device, leads to
Cross the level side in the middle part of the direction of principal axis of X, Y, Z tri-, the direction of principal axis of X, Y, Z tri- of lower bearing bracket, stator of the upper spider of pump-storage generator
To the direction of principal axis of X, Y, Z tri- of, stator upper vertical direction and top cover, totally 11 point positions are provided with displacement type low frequency speed simultaneously
Sensor and velocity profile low-frequency velocity sensor are spent, passes through 11 displacement type low-frequency velocity sensors and 11 velocity profile low frequency speed
Sensor is spent while measuring the vibration signal at 11 measuring points；Detect that low and medium frequency vibrates by displacement type low-frequency velocity sensor
Signal, by velocity profile low-frequency velocity sensor detect high frequency vibration signal, comprehensively collection pump-storage generator on each
The vibration signal of position, and by consider the time domain of vibration displacement signal, the time domain of frequency domain characteristic and vibration velocity signal,
Frequency domain characteristic, can be better achieved the Validity Test vibrated to pump-storage generator and analysis, avoid causing a certain frequency as far as possible
Vibration information missing in the range of rate, to obtain the real running status of unit well and to be adjusted, improves vibration
The degree of accuracy of monitoring, reduces the situation that unit breaks down.In addition, the present invention is also provided with speed probe to detect that main shaft turns
Speed, and the first signal conditioner and secondary signal conditioner are provided with respectively to vibration displacement signal and the progress of vibration velocity signal
Conditioning, while the original unit monitoring system of pump-storage generator is also utilized, the power signal of real-time collection pump-storage generator,
Guide vane opening signal, upper pond level signal and level of tail water signal, obtain Faults by Vibrating, main shaft by computer integrated and turn
After speed, the power signal of pump-storage generator, guide vane opening signal, upper pond level signal and level of tail water signal, then carry out machine
Group regulation, further reduces the situation that unit breaks down.Therefore, the present invention is carrying out vibration monitoring to pump-storage generator
In, the degree of accuracy of vibration monitoring can not only be improved, additionally it is possible to reduce unit and break down.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the flow chart of the present invention；
Fig. 3 is the lower bearing bracket X-direction vibration displacement waveform of the present invention, spectrum diagram；
Fig. 4 is the lower bearing bracket X-direction vibration velocity waveform of the present invention, spectrum diagram.
Mark in accompanying drawing for：1- computers, 2- data collecting cards, the signal conditioners of 3- first, the conditioning of 4- secondary signals
Device, 5- displacement type low-frequency velocity sensors, 6- velocity profile low-frequency velocity sensors, 7- speed probes, 8- unit monitoring systems.
Embodiment
With reference to embodiment, the present invention is further illustrated, but is not intended as to the foundation of the invention limited.
Embodiment one.A kind of pump-storage generator vibration monitoring method, as shown in Fig. 2 comprising the following steps：
A, collection pump-storage generator are in the middle part of the direction of principal axis of XYZ tri-, the direction of principal axis of XYZ tri- of lower bearing bracket, stator of upper spider
Vibration displacement signal and vibration velocity signal on the direction of principal axis of XYZ tri- of horizontal direction, stator upper vertical direction and top cover, often
Individual collection direction is used as a measuring point；
B, the vibration displacement signal of change collected according to each measuring point obtain the vibration displacement time domain parameter of each measuring point
With vibration displacement frequency domain parameter；
C, the vibration velocity signal of change collected according to each measuring point obtain the vibration velocity time domain parameter of each measuring point
With vibration velocity frequency domain parameter；
D, the vibration displacement time domain parameter with reference to each measuring point, vibration displacement frequency domain parameter, vibration velocity time domain parameter and
Vibration velocity frequency domain parameter, obtains the Faults by Vibrating P of each measuring point.
Vibration displacement time domain parameter in the step b is V0, V0Equal to the peak-to-peak value of vibration displacement signal；The step b
In vibration displacement frequency domain parameter be V1, first vibration displacement signal being done when tried to achieve after DFT vibration displacement signal
The frequency spectrum of sequential signal, chooses preceding 5 dominant frequency values maximum in the frequency spectrum as vibration displacement frequency domain parameter, i.e. V1=[(f1, F1),
(f2, F2), (f3, F3), (f4, F4), (f5, F5)], wherein the f of (i=1,2,3,4,5)iFor preceding 5 maximum amplitudes correspondence in frequency spectrum
Frequency, FiFor preceding 5 maximum amplitudes in frequency spectrum, and F1>F2>F3>F4>F5。
Vibration velocity time domain parameter in the step c is H0, H0Equal to the virtual value of vibration velocity signal；The step c
In vibration velocity frequency domain parameter be H1, first vibration velocity signal being done when tried to achieve after DFT vibration velocity signal
The frequency spectrum of sequential signal, chooses preceding 5 dominant frequency values maximum in the frequency spectrum as vibration velocity signal frequency domain parameter, i.e. H1=[(a1,
A1), (a2, A2), (a3, A3), (a4, A4), (a5, A5)], wherein a of (i=1,2,3,4,5)iFor preceding 5 maximum amplitudes in frequency spectrum
Corresponding frequency, AiFor preceding 5 maximum amplitudes in spectrogram, and A1>A2>A3>A4>A5。
Faults by Vibrating P=[V in the step d0, H0, V1, H1]。
By the operating mode at Faults by Vibrating P moment corresponding with unit, (operating mode includes the speed of mainshaft, power signal, stator and opened
Degree signal, upper pond level signal and level of tail water signal) it is combined, unit regulation is then carried out, so as to reduce unit failure hair
Raw rate.
According to the monitoring system constructed by a kind of foregoing pump-storage generator vibration monitoring method, constitute as shown in figure 1,
Including computer 1, data collecting card 2 is connected with computer 1；The first signal conditioner 3 and are connected with data collecting card 2
11 displacement type low-frequency velocity sensors 5, secondary signal conditioner are connected with binary signal conditioner 4, the first signal conditioner 3
11 velocity profile low-frequency velocity sensors 6 are connected with 4；11 displacement type low-frequency velocities sensor 5, which is respectively arranged at, to be taken out
The direction of principal axis of XYZ tri- of the upper spider of water accumulation of energy unit, the direction of principal axis of XYZ tri- of lower bearing bracket, stator middle part horizontal direction, stator top
On the direction of principal axis of XYZ tri- of vertical direction and top cover, the set location of 11 velocity profile low-frequency velocity sensors 6 and 11 displacement types
The set location of low-frequency velocity sensor 5 is identical.
Speed probe 7 is also associated with the data collecting card 2, speed probe 7 is arranged at pump-storage generator
On main shaft；The unit monitoring system 8 of pump-storage generator is also associated with the data collecting card 2；The displacement type low frequency speed
The inertia-type displacement type low-frequency velocity sensor that sensor 5 is contact is spent, the electric whirlpool of IN-081 types of German Shen gram can be used
Flow sensor；Velocity profile low-frequency velocity sensor 6 is the inertia-type velocity profile low-frequency velocity sensor of contact, can be using north
Jing Haoruisi MLS-9 type low-frequency velocity sensors (displacement type)；The speed probe 7 is contactless revolution speed sensing
Device, can use Beijing Hao Ruisi MLS-9 type low-frequency velocity sensors (velocity profile).
Speed probe 7 is arranged on the main shaft of pump-storage generator, by the pump-storage generator speed of mainshaft collected
Signal is transmitted to computer 1 through data collecting card 2.11-displacement type low-frequency velocity sensor 5 is separately mounted to water-storage
It is the axle of upper spider three (X-axis, Y-axis, Z axis) direction of unit, the axle of lower bearing bracket three (X-axis, Y-axis, Z axis) direction, level in the middle part of stator, fixed
On sub- upper vertical direction and the axle of top cover three (X-axis, Y-axis, Z axis) direction, by the upper spider of the pump-storage generator collected, under
The vibration position signal of frame, stator and top cover inputted in the first signal conditioner 3, and the first signal conditioner 3 will be received
Transmitted after the amplification of vibration displacement signal, filtering through data collecting card 2 to computer 1.11 velocity profile low-frequency velocity sensors 6
Similarly install, be separately mounted to the axle of upper spider three (X-axis, Y-axis, Z axis) direction, the axle of lower bearing bracket three (X-axis, the Y of pump-storage generator
Axle, Z axis) direction, in the middle part of stator on level, stator upper vertical direction and the axle of top cover three (X-axis, Y-axis, Z axis) direction, it will gather
To the upper spider of pump-storage generator, lower bearing bracket, stator and top cover vibration velocity signal input to secondary signal conditioner 4
Interior, secondary signal conditioner 4 will be transmitted to computer 1 after the vibration velocity signal received amplification, filtering through data collecting card 2
It is interior.The pump-storage generator monitoring system 8 used in the present invention is existing device in the prior art, the unit of pump-storage generator
Monitoring system 8 is by the pump-storage generator power signal obtained in real time, guide vane opening signal, upper pond level signal and the level of tail water
Signal, is inputted to computer 1 through data collecting card 2.Computer 1 is by the tach signal received, vibration signal (vibration displacement
Signal, vibration velocity signal), power signal, guide vane opening signal, upper pond level signal and level of tail water signal, with computer 1
Interior preset computation model carries out analysis calculating, to realize to pump-storage generator vibration measurement and analysis, according to analysis result
Carry out unit regulation.
Embodiment two.Vibration-testing is carried out to pump-storage generator, to obtain vibration characteristics of the unit in different operating modes.
Unit rated speed 375r/min, runner bucket number 9, stator number 20, rated head 447.0m, maximum head 492.27m, most
Small head 420.96m, number of magnetic poles 16.Operating condition of test is respectively：1) pumping operation mode, unit continuous pumpage is synchronous every 30 minutes
Gather unit vibration signal.2) generating operation mode, has carried out the load change test of generating operation mode, operating condition of test point under test head
Respectively 148MW, 190MW, 230MW, 262MW, 285MW, 300MW, 338MW, 375MW, synchronous after operating point to be tested is stable
Gather unit vibration signal.Test measuring point：1) unit duty parameter measuring point includes：Active power, guide vane opening, upper pond level,
The level of tail water, rotating speed.2) unit vibration measuring point includes：Three axles (X-axis, Y-axis, Z axis) direction of upper spider, three axle (X of lower bearing bracket
Axle, Y-axis, Z axis) direction, in the middle part of stator on three axles (X-axis, Y-axis, Z axis) direction of level, stator upper vertical direction and top cover.
Each measuring point lays displacement type low-frequency velocity sensor 5 and the two types sensor of velocity profile low-frequency velocity sensor 6.
The sample frequency selected in the present embodiment is 2000Hz, and sampling number is 240k.Unit output is 188MW, stator
When aperture 79.4%, gross head 441.7m (gross head=upper pond level-level of tail water), lower bearing bracket X-direction (i.e. X-direction) is shaken
Displacement signal, lower bearing bracket X-direction (i.e. X-direction) vibration velocity signal waveform, spectrum utilization computer drawing are moved into figure；From figure
In 3 as can be seen that the major peaks of lower bearing bracket X-direction (i.e. X-direction) vibration displacement signal spectrum to be concentrated mainly on low frequency attached
Closely, at 6.25Hz frequencies, there is 5.973 μm maximum of peak value；(the i.e. X side figure 4, it is seen that lower bearing bracket X-direction
To) major peaks of vibration velocity signal spectrum are concentrated mainly on intermediate frequency, near high frequency, at 204.82Hz frequencies, occur most
Big peak value 0.0174mm/s.
1) it is used as vibration displacement time domain parameter V from the peak-to-peak value of vibration displacement signal0；
Now, V0=37.52.
2) frequency spectrum that vibration displacement signal sequence signal is tried to achieve after DFT is first done to vibration displacement signal, is selected
Preceding 5 dominant frequency values maximum in the frequency spectrum are taken as vibration displacement frequency domain parameter V1, i.e. V1=[(f1, F1), (f2, F2), (f3,
F3), (f4, F4), (f5, F5)], wherein the f of (i=1,2,3,4,5)iFor the corresponding frequency of preceding 5 maximum amplitudes, F in frequency spectrumiFor
Preceding 5 maximum amplitudes in frequency spectrum, and F1>F2>F3>F4>F5。
Now, V1=[(6.25,5.973), (12.5,0.600), (74.96,0.405), (18.76,0.323),
(50.03,0.313)].Wherein, 6.25Hz is that unit turns frequency, and 12.5Hz turns two frequencys multiplication of frequency for unit, and 74.96 be thrust bearing shoe valve
By frequency, 18.76Hz turns the frequency tripling of frequency for unit, and 50.03Hz is power supply disturbance or electromagnetic frequency.As can be seen that should
Vibration signal mainly reflect unit turn frequency and its frequency multiplication, electromagnetism in terms of characteristic.
3) it is used as vibration velocity time domain parameter H from the virtual value of vibration velocity signal0。
Now, H0=0.0512.
4) frequency spectrum that vibration velocity signal sequence signal is tried to achieve after DFT is first done to vibration velocity signal, is selected
Preceding 5 dominant frequency values maximum in the frequency spectrum are taken as vibration velocity signal frequency domain parameter, i.e. H1=[(a1, A1), (a2, A2), (a3,
A3), (a4, A4), (a5, A5)], wherein a of (i=1,2,3,4,5)iFor the corresponding frequency of preceding 5 maximum amplitudes, A in frequency spectrumiFor
Preceding 5 maximum amplitudes in spectrogram, and A1>A2>A3>A4>A5。
Now, H1=[(204.8,0.01736), (49.98,0.01568), (112.6,0.01326), (199.9,
0.002119), (74.96,0.001875)].Wherein, it is initially believed that to be factory building additional mass the reason for 204.8Hz exciting source
Influence, 49.98Hz be power supply disturbance or electromagnetic frequency, 112.6 be blade excessively stream frequency two frequencys multiplication, 199.9Hz for electricity
Two frequencys multiplication of magnet rate, 74.96 pass through frequency for thrust bearing shoe valve.As can be seen that the vibration signal mainly reflects water-storage
Characteristic in terms of Power Plant, unit waterpower and electromagnetism.
5) Faults by Vibrating is obtained：Consider measuring point vibration displacement characteristic, vibration velocity characteristic, obtain the measuring point total
Faults by Vibrating P=[V0, H0, V1, H1]。
Now, P=[(37.52,0.0512), (6.25,5.973), (12.5,0.600), (74.96,0.405),
(18.76,0.323), (50.03,0.313), (204.8,0.01736), (49.98,0.01568), (112.6,0.01326),
(199.9,0.002119), (74.96,0.001875)].
From P as can be seen that using the Faults by Vibrating that obtains of the present invention, can obtain simultaneously vibration signal low frequency, in
Frequently, high frequency full frequency band feature, can preferably obtain the vibration characteristics of unit.
In summary (embodiment one, two), the direction of principal axis of XYZ tri- of the upper spider of pump-storage generator, lower machine in the present invention
The direction of principal axis of XYZ tri- of frame is identical with the direction of principal axis of XYZ tri- of top cover, i.e. the three-axis reference of upper spider, the triaxial coordinate of lower bearing bracket
The three-axis reference of system and top cover is the same coordinate system；Four machine lines using pump-storage generator is X-axis, and unit centre is seat
Origin is marked, vertical with X-axis for Y-axis, upstream is+Y-axis, and tail water is-Y-axis, and Z axis defers to right-hand rule determination.Vibration in Fig. 2
Parameter is vibration parameterses, and time domain parameter includes vibration displacement time domain parameter and vibration velocity time domain parameter, frequency domain parameter
Including vibration displacement frequency domain parameter and vibration velocity frequency domain parameter；Two " preceding 5 dominant frequency values " are preceding 5 dominant frequency of maximum
Value.
Claims (10)
1. a kind of pump-storage generator vibration monitoring method, it is characterised in that comprise the following steps：
A, collection pump-storage generator level in the middle part of the direction of principal axis of XYZ tri-, the direction of principal axis of XYZ tri- of lower bearing bracket, stator of upper spider
Vibration displacement signal and vibration velocity signal on the direction of principal axis of XYZ tri- in direction, stator upper vertical direction and top cover, are each adopted
Collection direction is used as a measuring point；
B, the vibration displacement signal of change collected according to each measuring point obtain the vibration displacement time domain parameter of each measuring point and shaken
Dynamic displacement frequency domain parameter；
C, the vibration velocity signal of change collected according to each measuring point obtain the vibration velocity time domain parameter of each measuring point and shaken
Dynamic speed frequency domain parameter；
D, the vibration displacement time domain parameter with reference to each measuring point, vibration displacement frequency domain parameter, vibration velocity time domain parameter and vibration
Speed frequency domain parameter, obtains the Faults by Vibrating P of each measuring point.
2. a kind of pump-storage generator vibration monitoring method according to claim 1, it is characterised in that：In the step b
Vibration displacement time domain parameter be V0, V0Equal to the peak-to-peak value of vibration displacement signal；Vibration displacement frequency domain ginseng in the step b
Number is V1, the frequency spectrum that vibration displacement signal sequence signal is tried to achieve after DFT is first done to vibration displacement signal, is chosen
Maximum preceding 5 dominant frequency values are used as vibration displacement frequency domain parameter, i.e. V in the frequency spectrum1=[(f1, F1), (f2, F2), (f3, F3),
(f4, F4), (f5, F5)], wherein the f of (i=1,2,3,4,5)iFor the corresponding frequency of preceding 5 maximum amplitudes, F in frequency spectrumiFor frequency spectrum
In preceding 5 maximum amplitudes, and F1>F2>F3>F4>F5。
3. a kind of pump-storage generator vibration monitoring method according to claim 2, it is characterised in that：In the step c
Vibration velocity time domain parameter be H0, H0Equal to the virtual value of vibration velocity signal；Vibration velocity frequency domain ginseng in the step c
Number is H1, the frequency spectrum that vibration velocity signal sequence signal is tried to achieve after DFT is first done to vibration velocity signal, is chosen
Maximum preceding 5 dominant frequency values are used as vibration velocity signal frequency domain parameter, i.e. H in the frequency spectrum1=[(a1, A1), (a2, A2), (a3,
A3), (a4, A4), (a5, A5)], wherein a of (i=1,2,3,4,5)iFor the corresponding frequency of preceding 5 maximum amplitudes, A in frequency spectrumiFor
Preceding 5 maximum amplitudes in spectrogram, and A1>A2>A3>A4>A5。
4. a kind of pump-storage generator vibration monitoring method according to claim 3, it is characterised in that：In the step d
Faults by Vibrating P=[V0, H0, V1, H1]。
5. according to the monitoring system constructed by a kind of pump-storage generator vibration monitoring method described in claim 4, its feature
It is：Including computer (1), data collecting card (2) is connected with computer (1)；Data collecting card is connected with the first letter on (2)
11 displacement type low-frequency velocities biographies are connected with number conditioner (3) and secondary signal conditioner (4), the first signal conditioner (3)
11 velocity profile low-frequency velocity sensors (6) are connected with sensor (5), secondary signal conditioner (4)；11 displacement types are low
Frequency velocity sensor (5) is respectively arranged at the axle sides of XYZ tri- of the direction of principal axis of XYZ tri- of the upper spider of pump-storage generator, lower bearing bracket
In the middle part of to, stator on the direction of principal axis of XYZ tri- of horizontal direction, stator upper vertical direction and top cover, 11 velocity profile low-frequency velocities
The set location of sensor (6) is identical with the set location of 11 displacement type low-frequency velocity sensors (5).
6. monitoring system according to claim 5, it is characterised in that：Rotating speed is also associated with the data collecting card (2)
Sensor (7), speed probe (7) is arranged on the main shaft of pump-storage generator.
7. monitoring system according to claim 5, it is characterised in that：It is also associated with drawing water on the data collecting card (2)
The unit monitoring system (8) of accumulation of energy unit.
8. monitoring system according to claim 5, it is characterised in that：The displacement type low-frequency velocity sensor (5) is to connect
The inertia-type displacement type low-frequency velocity sensor of touch.
9. monitoring system according to claim 5, it is characterised in that：Velocity profile low-frequency velocity sensor (6) is contact
Inertia-type velocity profile low-frequency velocity sensor.
10. the monitoring system according to any claim in claim 5 to 9, it is characterised in that：The speed probe
(7) it is contactless speed probe.
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| CN107976249A (en) * | 2017-11-24 | 2018-05-01 | 四川中鼎科技有限公司 | A kind of method for measuring Hydraulic Power Unit vibration |
| CN111682712A (en) * | 2020-06-29 | 2020-09-18 | 哈尔滨电机厂有限责任公司 | On-site installation method of large generator end vibration monitoring device |
| CN111735529A (en) * | 2020-07-01 | 2020-10-02 | 哈尔滨电机厂有限责任公司 | Large-scale generator motor winding end vibration on-line monitoring device |
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