CN105406793B - A kind of device and method for suppressing axial torsional vibration - Google Patents
A kind of device and method for suppressing axial torsional vibration Download PDFInfo
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- CN105406793B CN105406793B CN201510990827.6A CN201510990827A CN105406793B CN 105406793 B CN105406793 B CN 105406793B CN 201510990827 A CN201510990827 A CN 201510990827A CN 105406793 B CN105406793 B CN 105406793B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/04—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
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- Control Of Electric Motors In General (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Multiple Motors (AREA)
Abstract
The invention discloses a kind of device and method for suppressing axial torsional vibration, it can be applicable in power packet system, it is related to the Frequency Conversion Modification technical field of power station equipment, obtain the operational factor of current drive device and load equipment in real time by sensing equipment, controller calculates and exported a controlled quentity controlled variable according to the operational factor and corresponding mathematical modeling of acquisition, so that the compensation rate of frequency converter output electric energy frequency, and then adjust the operational factor of driving equipment, effectively to suppress the generation of the unfavorable factors such as the axial torsional vibration in the drive apparatus between driving equipment and load equipment, reduce the probability that the failures such as Frequency Conversion Modification process axle shafting fracture occur.
Description
Technical field
The present invention relates to the Frequency Conversion Modification technical field of power station equipment, more particularly to a kind of device for suppressing axial torsional vibration and side
Method.
Background technology
At present, for energy-saving and emission-reduction, typically the medium-and-large-sized blower fan of power plant cooling system can be reduced using frequency control
Energy consumption, the Fan of Power Plant cooling system after Frequency Conversion Modification generally comprise the parts such as frequency converter, motor, blower fan and Upper system
Form.But have been found that in actual applications, shafting can be continuously emerged using the Fan of Power Plant cooling system of variable-frequency control technique
The failures such as mechanical failure, and from the point of view of accident section inspection result, failure cause is usually fatigue rupture caused by axial torsional vibration and drawn
Rise, such as may result in above-mentioned mechanical breakdown when mechanical resonant occurs for shafting.
At present, industry is usually to suppress the hair of mechanical resonant using the methods of such as frequency hopping, accelerator feedback, wave filter
It is raw, but be to be applied to the closed-loop control system that tape speed feeds back mostly the methods of accelerator feedback and wave filter, and frequency hopping etc. is then more
It is applied in the power plant using the frequency converter with open loop V/F control systems；So instantly mostly is the side using " frequency hopping "
Method suppresses the mechanical resonant in Fan of Power Plant cooling system, i.e., multiple " frequency hopping points " is set in speed regulation process, to skip
The Frequency point of blower fan power generation system shafting vibration is caused, but from the point of view of practical application, using the effect also ten of the method for " frequency hopping "
Divide limited.
The content of the invention
For above-mentioned problem, this invention describes a kind of device and method for suppressing axial torsional vibration, electricity can be applied to
Stand in the Frequency Conversion Modification of equipment, based on power packet system, current drive device and load can be obtained in real time by sensing equipment
The operational factor of equipment, and calculate and export one according to the operational factor and corresponding mathematical modeling of acquisition using controller
Controlled quentity controlled variable so that frequency converter exports the compensation rate of electric energy frequency, and then adjusts the operational factor of driving equipment, effectively to suppress
The generation of the unfavorable factors such as the axial torsional vibration in drive apparatus between driving equipment and load equipment, reduce Frequency Conversion Modification process axle
The probability that the failures such as shafting fracture occur.
To achieve these goals, the technical scheme taken of the present invention is：
A kind of device for suppressing axial torsional vibration, based on power packet system, can be applied in the Frequency Conversion Modification of power station equipment, described
Device includes：
Load equipment (such as blower fan and/or solidifying pump), as the executing agency of the power packet system, with to target control
Amount is adjusted；
Driving equipment, it is connected by drive apparatus with the load equipment, to drive the load equipment to work；
Frequency converter, it is connected with the driving equipment, to control the load by adjusting the operation of the driving equipment
The rotating speed of equipment；
Sensing equipment, it is connected respectively with the load equipment and the driving equipment, to obtain the load equipment in real time
First parameter of operation and the second parameter of driving equipment operation；
Controller, it is connected respectively with the sensing equipment and the frequency converter；
Wherein, the controller receives and to adjust the frequency converter according to first parameter and second parameter defeated
Go out the 3rd parameter of electric energy, to suppress the axial torsional vibration in the drive apparatus.
As a preferred embodiment, the device of above-mentioned suppression axial torsional vibration also includes：
Remote monitoring module, it is connected with the controller, to obtain and show first parameter and/or the second parameter
And/or the 3rd parameter；
Wherein, the 3rd parameter can be changed according to demand using the remote monitoring module, to suppress the transmission
Axial torsional vibration in equipment.
As a preferred embodiment, sensing equipment includes described in the device of above-mentioned suppression axial torsional vibration：
First sensor, it is connected respectively with the load equipment and the controller, to obtain and send described the in real time
One parameter is to the controller；
Second sensor, it is connected respectively with the driving equipment and the controller, to obtain and send described the in real time
Two parameters are to the controller.
As a preferred embodiment, in the device of above-mentioned suppression axial torsional vibration：
The first sensor includes load condition observation module, and the second sensor includes speed estimate module, institute
Stating controller includes resonance suppression compensating controller.
As a preferred embodiment, in the device of above-mentioned suppression axial torsional vibration：
The driving equipment is motor, and the load equipment includes blower fan and/or solidifying pump；
Wherein, the motor drives the blower fan and/or the solidifying pump work.
As a preferred embodiment, in the device of above-mentioned suppression axial torsional vibration：
First parameter includes the rotating speed of load equipment；
Second parameter includes the rotating speed of the driving equipment and the transmission Shaft angle of the drive apparatus；
The adjustment that 3rd parameter includes the electric energy conveyed to the driving equipment compensates frequency；
Wherein, the speed estimate module currently obtains the voltage and electricity of electric energy according to reference frequency and the load equipment
Stream, to calculate the rotating speed of the load equipment.
As a preferred embodiment, the device of above-mentioned suppression axial torsional vibration also includes：
Wave filter, the resonance suppress compensating controller and are connected by the wave filter with the motor, drawn with filtering out
Play the harmonic component of torsional oscillation.
, can be based on the suppression axial torsional vibration described in above-mentioned any one present invention also provides a kind of method for suppressing axial torsional vibration
Device, methods described includes：
The first parameter of present load equipment operation and the second parameter of driving equipment operation are obtained using sensing equipment；
Controller adjusts the frequency converter output electric energy according to first parameter and second parameter of acquisition
3rd parameter, to suppress the axial torsional vibration in the drive apparatus.
As a preferred embodiment, the method for above-mentioned suppression axial torsional vibration also includes：
Obtained in real time using monitoring device and show first parameter and/or the second parameter and/or the 3rd parameter.
As a preferred embodiment, the method for above-mentioned suppression axial torsional vibration also includes：
The 3rd parameter of frequency converter output electric energy is adjusted using monitoring device according to demand, to suppress the transmission
Axial torsional vibration in equipment.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, the present invention and its feature, outside
Shape and advantage will become more apparent.The identical mark instruction identical part in whole accompanying drawings.Not can according to than
Example draws accompanying drawing, it is preferred that emphasis is shows the purport of the present invention.
Fig. 1 is the structural representation of traditional power plants cooling system；
Fig. 2 is the structural representation of the device for the suppression axial torsional vibration that the embodiment of the present invention one is provided；
Fig. 3 is the flow chart of the method for the suppression axial torsional vibration that the embodiment of the present invention two is provided.
Embodiment
Due in the Fan Cooling System in current power plant, when using variable-frequency control technique come energy-saving and emission-reduction, meeting
It was found that using power network directly power constant speed driven gas heat pump mode when be typically not in such as shafting mechanical breakdown the problems such as, and once change
After frequency control, the mechanical breakdowns such as off-axis will often occur, and failure is also occurred in Large Copacity blower fan, i.e. little Rong
Measuring blower fan, then the probability of the mechanical failure such as generation off-axis is relatively very small after frequency control is used instead；After later stage statistical analysis
It was found that even if mechanical breakdown can be occurred by also only having minority in Large Copacity blower fan.
The problem of above-mentioned cause is produced in order to understand in depth, inventor has found after carefully analyzing：
1) in terms of control mode, because the control system of the frequency converter applied to power plant is open loop V/F controls mostly, i.e., not
Speed closed loop oscillation problem be present, and the frequency converter that current industry typically uses all is so-called " perfect harmony " frequency converter, i.e.,
Output harmonic wave is also little.
2) formed from system mechanics and operation angle considers, because motor and fans load constitute two quality systems,
As shown in figure 1, the Fan Cooling System in power plant generally comprises motor 11, shaft transmission system 12 and fans load module 13,
I.e. motor 11 drives fans load module 13 to work by shaft transmission system 12, understands that the blower fan is cold based on structure shown in Fig. 1
But system is to belong to order Oscillating link, i.e., excited target (dynamic impulsion or harmonic wave) just vibrates, but due to shaft transmission system 12
It is elastic system, it has certain amplification to resonance torque, and magnification ratio depends on the ratio between inertia of blower fan and motor.
For large fan (the distance between diaphragm coupling and fan bearing in shaft transmission system 12 are about 10m), even if containing
The very low resonant frequency harmonic wave of ratio, it is also possible to inspire 100% shaft torque vibration.When resonance occurs, article for rotation
Kinetic energy and elastic potential energy swap, i.e., when there is destructive torsional oscillation, very big distortion torque in axle, and required outside is swashed
Encourage very little (i.e. fluctuation of motor current is between 10-20%), therefore system power fluctuation and unobvious；Simultaneously as frequency converter
The frequency of output harmonic wave is wider, that is, the range of speeds for exciting axial torsional vibration is wider, therefore may all swash in wide speed range
Torsional oscillation is sent out, and then make it that frequency hopping is invalid, that is, to set the using effect of the method for multiple " frequency hoppings " point limited.
3) presence damped in shaft transmission system 12 inhibits the generation of resonance to a certain extent, and motor torque fluctuation also can
Damping is introduced, therefore, and axle fracture failure can all occur in not all blower fan system.
Based on above-mentioned technical Analysis, below in conjunction with the accompanying drawings and specific embodiment, the present invention is further illustrated, but
It is not as limiting to the invention.
Embodiment one：
Fig. 2 is the structural representation (knot shown in the Fig. 2 of the device for the suppression axial torsional vibration that the embodiment of the present invention one is provided
Structure can be used as a power packet system framework)；As shown in Fig. 2 present embodiments providing a kind of device for suppressing axial torsional vibration, can answer
For in the cooling system in power plant, in the system cooled down for example with the equipment such as large fan and/or solidifying pump to thermal source,
And can be on the basis of high efficiency smart power packet system, by integrating the keys such as frequency converter, induction machine and fans load
Parameter, using proprietary control strategy, harmonics of inverter output can be reduced in wide frequency ranges, further to suppress axial torsional vibration
Etc. the generation of mechanical breakdown, the device may include：
Load equipment, as the executing agency of the power packet system, target variable to be adjusted processing；Need to note
Meaning, it is so that in the cooling system applied to power plant, corresponding above-mentioned load equipment can be power plant in embodiment
In large fan and/or the instrument and equipment such as solidifying pump, and the thermal source in power plant can be carried out using the load equipment at cooling
Reason, and when the technical scheme of the application is applied to other power station equipment systems (as included the air cooling system of blower fan and/or including solidifying
Water-cooling system of pump etc.) in, load equipment is other instruments equipment, and specific those skilled in the art can be according to disclosed in the present application
Technical characteristic is determined, that is, the technical scheme that should not be construed as the application is applicable only in the cooling system in power plant.
Driving equipment, it can be connected by drive apparatus (such as bearing-transmission system) with above-mentioned load equipment, with driving
Load equipment provides the energy of work；For example, the driving equipment can be motor (such as induction machine), generally electricity consumption is set
Equipment standby, i.e., that above-mentioned blower fan and/or solidifying pump are driven using electric energy.
Frequency converter, it can be connected by wave filter with above-mentioned driving equipment, with what is conveyed by adjusting to driving equipment
Energy controls the operation of driving equipment, such as the frequency of the electric energy that can be obtained by adjusting motor adjusts turning for motor
Speed, and then to adjust the operating (typically adjusting rotating speed) of blower fan and/or solidifying pump even load equipment, to avoid system from producing to transmission
Torsional oscillation that the part such as bearing adversely affects in equipment etc..
Sensing equipment, it is connected respectively with above-mentioned load equipment and driving equipment, to obtain cooling system operation in real time
First parameter and the second parameter of driving equipment operation；The sensing equipment may include sensor, i.e., is connected with load equipment
First sensor (may include load condition observe module) and the second sensor that is connected with driving equipment (may include that rotating speed is estimated
Count module), to include the first parameter of the rotating speed of load equipment etc. using first sensor acquisition, obtained using second sensor
Second parameter of the transmission Shaft angle of rotating speed and drive apparatus including driving equipment etc..
Controller (may include that resonance suppresses compensating controller), can be connected respectively with above-mentioned sensing equipment and frequency converter,
By receive and according to above-mentioned the first parameter and the second parameter come adjust frequency converter export electric energy the 3rd parameter (may include to
The adjustment compensation frequency for the electric energy that driving equipment provides), to suppress the appearance of the adverse effects such as the axial torsional vibration in drive apparatus.
Remote monitoring module (may include the parts such as display device and input equipment), is connected with above-mentioned controller, to obtain
Take and show the first parameter and/or the second parameter and/or the 3rd parameter (carrying out display monitoring using display module)；Meanwhile
This can also change the 3rd parameter according to demand (using above-mentioned input equipment (such as keyboard, mouse using the remote monitoring module
Mark, touch-screen etc.) change the 3rd parameter), to suppress the axial torsional vibration in the drive apparatus.
Preferably, above-mentioned speed estimate module can establish the mathematical modeling based on power bag motor accurate parameter, and tie
The parameter such as given reference frequency and the voltage actually obtained, electric current is closed, realizes the estimation to motor speed and position, and then
The approximation of the current rotating speed of motor can be obtained under open loop situations.
Preferably, above-mentioned load observation module can then establish the mathematics observation mould based on each equipment accurate parameter of power bag
Type, and using high_order sliding mode control device, to ensure the continuously smooth of controlled quentity controlled variable and quick response.
Preferably, above-mentioned resonance, which suppresses compensating controller, can then pass through load (such as blower fan and/or solidifying pump to observing
Deng) processing of rotating speed, power transmission shaft torsion angle, to obtain the fine setting compensation rate to the incoming frequency of motor, and can be equipped with
Between VF electric currents distribute module and driving equipment wave filter (i.e. provide electric energy power supply respectively with VF electric currents distribute module and
Resonance suppresses compensating controller connection, and VF electric currents distribute module then passes sequentially through such as wave filter, SVPWM modules and inverter
Deng being connected to induction machine after part, to provide electric energy operation to induction machine, and then Induction Motor Drive such as blower fan is utilized
Worked Deng cooling system), to reduce the harmonic component for causing torsional oscillation, and then realize to the steady control of rotating speed, gone out with suppression system
The appearance of the unfavorable phenomenons such as existing axial torsional vibration.
Embodiment two
Fig. 3 is the flow chart of the method for the suppression axial torsional vibration that the embodiment of the present invention two is provided, as shown in figure 3, this implementation
In example two suppress axial torsional vibration method can based on above-described embodiment one suppress axial torsional vibration device on the basis of (i.e. embodiment one and
Can be mutually applicable between identical or corresponding technical characteristic in embodiment two), it can be applied in such as power plant for thermal source
Cooling in, the method for above-mentioned suppression axial torsional vibration may include：
First, the first parameter of current drive device and load equipment operation and the second ginseng can be obtained using sensing equipment
Number.
Secondly, the 3rd of frequency converter output electric energy is adjusted according to the first parameter and the second parameter of acquisition using controller
Parameter (the compensation frequency of such as electric energy), to suppress the axial torsional vibration in the drive apparatus.
Finally, can using monitoring device come in real time obtain and show the first parameter and/or the second parameter and/or the 3rd ginseng
Number, to realize the real-time monitoring to cooling system.
Preferably, the of frequency converter output electric energy can also be adjusted according to the actual requirements by using above-mentioned monitoring device
Three parameters, you can directly input an adjusting parameter (i.e. the 3rd parameter) according to actual conditions, suppress to realize in drive apparatus
Axial torsional vibration purpose.
It should be noted that because the present embodiment two and above-described embodiment one are mutual corresponding structure and method, therefore
The identical or corresponding equal adaptability of technical characteristic referred in embodiment one is applied in the present embodiment two, and in embodiment
The identical or corresponding equal adaptability of technical characteristic referred in two is applied in the present embodiment one, therefore succinct in order to illustrate,
Or corresponding some technical characteristics identical with above-described embodiment one do not carry out repeating elaboration, but this area in this example two
Technical staff should be understood when, technical characteristic adaptability described in above-described embodiment one is applied in the present embodiment two
Technical characteristic, it should be understood as having in this example two described.
In summary, the device and method of the suppression axial torsional vibration in the embodiment of the present application, can be based on high efficiency smart power bag
Control system, the parameter of the load equipment including blower fan, solidifying pump etc. and the driving equipment including induction machine etc. is carried out
Integrate, by establishing effective Load Torque Observer, to realize the equivalent acquisition to loading parameter, and the load parameter of acquisition is defeated
Enter to resonance and suppress compensation control module, and then correction is finely adjusted to driving equipment (such as motor) incoming frequency, with letter
On the basis of easy vector controlled, realize the suppression to Torsional vibration, i.e., the device of the suppression axial torsional vibration in the embodiment of the present application and
Method can effectively reduce the generation of Frequency Conversion Modification process center shafting fracture defect while the reliability of power packet system is improved
Probability, and then the infant industry energy-saving represented with power Bao Wei can be promoted to upgrade energetically.
It should be appreciated by those skilled in the art that those skilled in the art combine prior art and above-described embodiment can be real
The existing change case, will not be described here.Such change case has no effect on the substantive content of the present invention, will not be described here.
Presently preferred embodiments of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as giving reality with the common mode in this area
Apply；Any those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the disclosure above
Methods and technical content many possible changes and modifications are made to technical solution of the present invention, or be revised as equivalent variations etc.
Embodiment is imitated, this has no effect on the substantive content of the present invention.Therefore, every content without departing from technical solution of the present invention, foundation
The technical spirit of the present invention still falls within the present invention to any simple modifications, equivalents, and modifications made for any of the above embodiments
In the range of technical scheme protection.
Claims (10)
- A kind of 1. device for suppressing axial torsional vibration, it is characterised in that applied in the power packet system of power station equipment, described device bag Include：Load equipment, as the executing agency of the power packet system, so that target control amount to be adjusted；Driving equipment, it is connected by drive apparatus with the load equipment, to drive the load equipment to work；Frequency converter, it is connected with the driving equipment, to control the load equipment by adjusting the operation of the driving equipment Rotating speed；Sensing equipment, it is connected with the load equipment and the driving equipment, is run with obtaining the load equipment in real time respectively The first parameter and the driving equipment operation the second parameter；Controller, it is connected respectively with the sensing equipment and the frequency converter；Wherein, the controller receives and the frequency converter output electricity is adjusted according to first parameter and second parameter 3rd parameter of energy, to suppress the axial torsional vibration in the drive apparatus.
- 2. suppress the device of axial torsional vibration as claimed in claim 1, it is characterised in that also include：Remote monitoring module, be connected with the controller, with obtain and show first parameter and/or the second parameter and/or 3rd parameter；Wherein, the 3rd parameter can be changed according to demand using the remote monitoring module, to suppress the drive apparatus In axial torsional vibration.
- 3. suppress the device of axial torsional vibration as claimed in claim 1, it is characterised in that the sensing equipment includes：First sensor, it is connected respectively with the load equipment and the controller, to obtain and send first ginseng in real time Count to the controller；Second sensor, it is connected respectively with the driving equipment and the controller, to obtain and send second ginseng in real time Count to the controller.
- 4. suppress the device of axial torsional vibration as claimed in claim 3, it is characterised in that the first sensor includes load condition Module is observed, the second sensor includes speed estimate module, and the controller includes resonance and suppresses compensating controller.
- 5. suppress the device of axial torsional vibration as claimed in claim 4, it is characterised in that the driving equipment is motor, described Load equipment includes blower fan and/or solidifying pump；Wherein, the motor drives the blower fan and/or the solidifying pump work.
- 6. suppress the device of axial torsional vibration as claimed in claim 4, it is characterised in that in described device：First parameter includes the rotating speed of load equipment；Second parameter includes the rotating speed of the driving equipment and the transmission Shaft angle of the drive apparatus；The adjustment that 3rd parameter includes the electric energy conveyed to the driving equipment compensates frequency；Wherein, the speed estimate module currently obtains the voltage and electric current of electric energy according to reference frequency and the load equipment, To calculate the rotating speed of the load equipment.
- 7. suppress the device of axial torsional vibration as claimed in claim 5, it is characterised in that described device also includes：Wave filter, the resonance suppress compensating controller and are connected by the wave filter with the motor, cause torsion to filter out The harmonic component shaken.
- A kind of 8. method for suppressing axial torsional vibration, it is characterised in that based on the suppression as described in any one in claim 1~7 The device of axial torsional vibration, methods described include：The first parameter of present load equipment operation and the second parameter of driving equipment operation are obtained using sensing equipment；Controller adjusts the 3rd of the frequency converter output electric energy according to first parameter and second parameter of acquisition Parameter, to suppress the axial torsional vibration in the drive apparatus.
- 9. suppress the method for axial torsional vibration as claimed in claim 8, it is characterised in that methods described also includes：Obtained in real time using monitoring device and show first parameter and/or the second parameter and/or the 3rd parameter.
- 10. suppress the method for axial torsional vibration as claimed in claim 8, it is characterised in that methods described also includes：The 3rd parameter of frequency converter output electric energy is adjusted using monitoring device according to demand, to suppress the drive apparatus In axial torsional vibration.
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| CN201510990827.6A CN105406793B (en) | 2015-12-24 | 2015-12-24 | A kind of device and method for suppressing axial torsional vibration |
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| CN201510990827.6A CN105406793B (en) | 2015-12-24 | 2015-12-24 | A kind of device and method for suppressing axial torsional vibration |
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| CN107294472B (en) * | 2017-05-23 | 2019-05-03 | 珠海格力电器股份有限公司 | A kind of motor control method, device and equipment |
| CN112671306B (en) * | 2021-01-20 | 2023-04-14 | 上海辛格林纳新时达电机有限公司 | Method and device for suppressing vibration of VF-controlled three-phase motor |
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