CN114593012A - Wind generating set transmission shaft torsional vibration protection device and method - Google Patents

Wind generating set transmission shaft torsional vibration protection device and method Download PDF

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Publication number
CN114593012A
CN114593012A CN202210256832.4A CN202210256832A CN114593012A CN 114593012 A CN114593012 A CN 114593012A CN 202210256832 A CN202210256832 A CN 202210256832A CN 114593012 A CN114593012 A CN 114593012A
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China
Prior art keywords
transmission shaft
generating set
wind generating
torsional vibration
transmission
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CN202210256832.4A
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Chinese (zh)
Inventor
兰杰
莫尔兵
林淑
赵伟
王其君
尹景勋
姚森
彭先伟
李颖
马伟栋
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Dongfang Electric Wind Power Co Ltd
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Dongfang Electric Wind Power Co Ltd
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Priority to CN202210256832.4A priority Critical patent/CN114593012A/en
Publication of CN114593012A publication Critical patent/CN114593012A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/103—Purpose of the control system to affect the output of the engine
    • F05B2270/1033—Power (if explicitly mentioned)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

The invention relates to the technical field of wind generating sets, and discloses a torsional vibration protection device and a torsional vibration protection method for a transmission shaft of a wind generating set. The invention solves the problems that the transmission shaft system is easy to vibrate in a torsional mode, the operation safety of a unit is seriously influenced and the like in the prior art.

Description

Wind generating set transmission shaft torsional vibration protection device and method
Technical Field
The invention relates to the technical field of wind generating sets, in particular to a torsional vibration protection device and method for a transmission shaft of a wind generating set.
Background
With the development of wind power generation technology and the market demand, the capacity of a wind generating set is larger and larger, and the blades are longer and longer. In addition, domestic wind power starts to be on line at a flat price, in order to reduce the cost of the unit and meet the challenge of the flat price on line of wind power generation, the weight and the rigidity of the blades are continuously reduced through optimized design, so that the blades are deformed more and more greatly, and meanwhile, in order to meet the price rise of raw materials such as copper, rare earth and the like, double-fed or semi-direct-driven transmission structures with longer transmission shafts and the like are adopted by wind power generation sets in a dispute. The large deformation of the blades and the longer transmission shaft system easily cause the torsional vibration of the transmission shaft system, and the operation safety of the unit is seriously influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a torsional vibration protection device and method for a transmission shaft of a wind generating set, and solves the problems that the transmission shaft system is easy to vibrate in a torsional mode, the operation safety of the wind generating set is seriously influenced and the like in the prior art.
The technical scheme adopted by the invention for solving the problems is as follows:
the utility model provides a wind generating set transmission shaft torsional vibration protection device, includes the transmission shafting, install in the front end of transmission shafting reaches the measuring device of the rear end of transmission shafting, measuring device includes zero pulse detector, zero pulse detector is used for measuring transmission shafting front end zero pulse time or transmission shafting rear end zero pulse time.
As a preferred technical scheme, the transmission shafting comprises a gear box, a main shaft connected to the front end of the gear box, and a coupler connected to the rear end of the gear box, and the zero pulse detector is respectively installed on the main shaft and the coupler.
As a preferred technical scheme, the transmission shafting comprises a wind wheel connected to one end of the main shaft far away from the gearbox and a generator connected to one end of the coupler far away from the gearbox.
As a preferred technical scheme, the measuring device further comprises a rotation speed sensor, and the rotation speed sensor is used for measuring the rotation speed of the front end of the transmission shaft system or the rotation speed of the rear end of the transmission shaft system.
A torsional vibration protection method for a transmission shaft of a wind generating set utilizes the torsional vibration protection device for the transmission shaft of the wind generating set, and comprises the following steps:
s1, acquiring the rotating speed omega at the two ends of the transmission shaft system by using the rotating speed sensor1And ω2(ii) a And; zero pulse detector is utilized to obtain zero time T of each rotation of two ends of transmission shaft system1And T2(ii) a Wherein, ω is1Is the front-end rotation speed of the transmission shaft system, omega2Is the rear end rotation speed, T, of the drive shaft system1Is the time of the zero pulse at the front end of the drive shaft system, T2Is the time of the zero pulse at the rear end of the transmission shaft system;
s2, according to the rotating speed omega at two ends of the transmission shaft system1And ω2And calculating to obtain the input torque of the whole transmission shafting, wherein the calculation formula is as follows:
Figure BDA0003548934910000021
wherein Q isinThe input torque is the input torque of the transmission shafting, and J is the equivalent moment of inertia of the transmission shafting;
and;
zero time T according to rotation of each circle at two ends of transmission shaft system1And T2Calculating the relative torsion angle of the front end and the rear end of the transmission shaft, wherein the calculation formula is as follows:
ΔT＝T2-T1 (2)，
Δψ＝ΔT×ω2 (3)；
wherein, the delta T is the zero pulse time difference between the front end of the transmission shaft system and the rear end of the transmission shaft system, and the delta psi is the relative torsion angle between the front end of the transmission shaft system and the rear end of the transmission shaft system;
s3, setting the maximum allowable input torque of the transmission shaft system to be QmaxAnd the maximum allowable relative torsion angle of the transmission shaft system is psimaxAnd setting protection logic for controlling the wind generating set to perform power reduction operation or shutdown.
As a preferable configuration, in step S3, the following are set: if Qin＞f1×QmaxThen the wind generating set carries out power reduction operation; wherein f is1In the range of [0.8, 1.1%]。
As a preferable configuration, in step S3, the following are set: if Δ ψ > f1×ψmaxAnd then the wind generating set performs power reduction operation.
As a preferable configuration, in step S3, the following are set: if Qin＞f2×QmaxIf so, stopping the wind generating set; wherein, f2In the range of [0.9,1.2]。
As a preferable configuration, in step S3, the following are set: if Δ ψ > f2×ψmaxAnd when the wind generating set stops.
As a preferred solution, f1Is 0.8, f2Is 0.9.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention solves the problems that the transmission shafting is easy to be subjected to torsional vibration and the operation safety of the unit is seriously influenced in the prior art;
(2) the invention can detect whether the transmission shaft system generates torsional vibration in real time, protect the operation safety of the unit, further reduce the design cost, and the technical scheme is easy for engineering application;
(3) the invention directly measures the phase difference between the rotating speed and the zero position of the front end and the rear end of the transmission shaft system, can directly and accurately acquire torsional vibration information, is easy to realize, has low cost and is convenient for batch popularization and application;
(4) the protection parameters of the invention are directly set according to design constraints, the physical significance is clear and definite, the repeated debugging and testing are avoided, and the invention is suitable for different machine types.
Drawings
Fig. 1 is a schematic structural view of a torsional vibration protection device for a transmission shaft of a wind generating set according to the present invention;
FIG. 2 is a schematic view of the installation of the null pulse detection device of the present invention;
FIG. 3 is a schematic diagram of the time difference calculation of the present invention;
fig. 4 is a control flowchart of an embodiment of a torsional vibration protection method for a transmission shaft of a wind turbine generator system according to the present invention.
Reference numbers and corresponding part names in the drawings: 1. measuring device, 2, gear box, 3, main shaft, 4, shaft coupling, 5, wind wheel, 6, generator.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Example 1
As shown in fig. 1 to 4, a wind generating set transmission shaft torsional vibration protection device includes a transmission shaft, and a measurement device 1 installed at the front end of the transmission shaft and the rear end of the transmission shaft, where the measurement device 1 includes a zero pulse detector, and the zero pulse detector is used to measure transmission shaft front-end zero pulse time or transmission shaft rear-end zero pulse time.
As a preferred technical scheme, the transmission shafting comprises a gear box 2, a main shaft 3 connected to the front end of the gear box 2, and a coupling 4 connected to the rear end of the gear box 2, and the zero pulse detector is respectively installed on the main shaft 3 and the coupling 4.
As a preferred technical solution, the transmission shaft system includes a wind wheel 5 connected to one end of the main shaft 3 far away from the gearbox 2, and a generator 6 connected to one end of the coupling 4 far away from the gearbox 2.
As a preferred technical solution, the measuring device 1 further comprises a rotation speed sensor, and the rotation speed sensor is used for measuring the rotation speed of the front end of the transmission shafting or the rotation speed of the rear end of the transmission shafting.
A torsional vibration protection method for a transmission shaft of a wind generating set utilizes the torsional vibration protection device for the transmission shaft of the wind generating set, and comprises the following steps:
s1, acquiring the rotating speed omega at the two ends of the transmission shaft system by using the rotating speed sensor1And ω2(ii) a And; zero pulse detector is utilized to obtain zero time T of each rotation of two ends of transmission shaft system1And T2(ii) a Wherein, ω is1Is the front-end rotation speed of the transmission shaft system, omega2Is the rear end rotation speed, T, of the drive shaft system1Is the time of the zero pulse at the front end of the drive shaft system, T2Is the time of the zero pulse at the rear end of the transmission shaft system;
s2, according to the rotating speed omega at two ends of the transmission shaft system1And ω2And calculating to obtain the input torque of the whole transmission shafting, wherein the calculation formula is as follows:
Figure BDA0003548934910000051
wherein Q isinThe input torque is the input torque of the transmission shafting, and J is the equivalent moment of inertia of the transmission shafting;
and;
zero time T according to rotation of each circle at two ends of transmission shaft system1And T2Calculating the relative torsion angle of the front end and the rear end of the transmission shaft, wherein the calculation formula is as follows:
ΔT＝T2-T1 (2)，
Δψ＝ΔT×ω2 (3)；
wherein, the delta T is the zero pulse time difference between the front end of the transmission shaft system and the rear end of the transmission shaft system, and the delta psi is the relative torsion angle between the front end of the transmission shaft system and the rear end of the transmission shaft system;
s3, setting the maximum allowable input torque of the transmission shaft system to be QmaxAnd a transmission shaft systemThe maximum allowable relative torsion angle is psimaxAnd setting protection logic for controlling the wind generating set to perform power reduction operation or shutdown.
As a preferable configuration, in step S3, the following are set: if Qin＞f1×QmaxIf so, the wind generating set performs power reduction operation; wherein f is1In the range of [0.8, 1.1%]。
As a preferable configuration, in step S3, the following are set: if Δ ψ > f1×ψmaxAnd then the wind generating set performs power reduction operation.
As a preferable configuration, in step S3, the following are set: if Qin＞f2×QmaxIf so, stopping the wind generating set; wherein f is2In the range of [0.9, 1.2%]。
As a preferable configuration, in step S3, the following are set: if Δ ψ > f2×ψmaxAnd when the wind generating set is in use, the wind generating set is stopped.
As a preferred solution, f1Is 0.8, f2Is 0.9.
By the technical scheme of the embodiment 1, the invention solves the problems that a transmission shaft system is easy to vibrate in a torsional mode, the operation safety of a unit is seriously influenced and the like in the prior art; the invention can detect whether the transmission shaft generates torsional vibration in real time, protect the unit operation safety, further reduce the design cost, and the technical scheme is easy for engineering application; the invention directly measures the phase difference between the rotating speed and the zero position of the front end and the rear end of the transmission shaft system, can directly and accurately acquire torsional vibration information, is easy to realize, has low cost and is convenient for batch popularization and application; the protection parameters of the invention are directly set according to design constraints, the physical significance is clear and definite, the repeated debugging and testing are avoided, and the invention is suitable for different machine types.
Example 2
As shown in fig. 1 to 4, as a further optimization of embodiment 1, this embodiment includes all the technical features of embodiment 1, and in addition, this embodiment further includes the following technical features:
the invention provides a torsional vibration protection method for a transmission shaft of a wind generating set, which can detect torsional vibration of the transmission shaft in real time and protect the running safety of the set.
When in use, the following steps are adopted:
firstly, respectively installing rotating speed sensors at the front end and the rear end of a transmission shaft system for acquiring rotating speeds omega at two ends of the transmission shaft system1,ω2Wherein ω is1Is the front-end rotation speed of the transmission shaft system, omega2Is the rear end rotating speed of the transmission shaft system;
secondly, respectively installing zero pulse detectors at the front end and the rear end of the transmission shaft system for acquiring zero time T of each rotation of two ends of the transmission shaft system1，T2Wherein T is1Is the time T of zero pulse detected at the front end of the transmission shaft system2The time when the rear end of the transmission shaft system detects zero pulse;
thirdly, calculating inertia torque according to the rotating speeds at two ends of the transmission shafting to obtain the input torque of the whole transmission shafting:
Figure BDA0003548934910000071
wherein: qinIs the input torque of the transmission shaft system, J is the equivalent moment of inertia of the transmission shaft system,
the fourth step is to
ΔT＝T2-T1 (2)；
Wherein: delta T is the zero pulse time difference of the front end and the rear end of the transmission shaft system, the time difference calculation method adopts high-frequency counting pulses, and the number of the counting pulses between the two zero pulses is calculated, and the reference is made to an attached figure 2;
reissue to order
Δψ＝ΔT×ω2 (3)；
The delta psi is the relative torsion angle of the front end and the rear end of the transmission shaft system;
fifthly, the maximum allowable input torque of the transmission shaft system is QmaxThe maximum allowable relative torsion angle of the front end and the rear end of the transmission shaft system is psimaxThen the following protection logic is designed:
1. when input torque Q of transmission shaftingin＞f1×QmaxOr Δ ψ > f1×ψmaxWhen the power is reduced, the power is reduced;
2. when input torque Q of transmission shaftingin＞f2×QmaxOr Δ ψ > f2×ψmaxWhen the system is in use, the system is stopped quickly;
in general f1Take 0.8, f20.9 can be taken, and the adjustment can also be carried out according to the actual operation condition on site.
The beneficial technical effect of this application is:
whether torsional vibration happens to a transmission shaft system can be detected in real time, the running safety of a unit is protected, the design cost is further reduced, and the technical scheme is easy for engineering application.
As described above, the present invention can be preferably realized.
All features disclosed in all embodiments in this specification, or all methods or process steps implicitly disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a wind generating set transmission shaft torsional vibration protection device, its characterized in that, includes the transmission shafting, install in the front end of transmission shafting reaches measuring device (1) of the rear end of transmission shafting, measuring device (1) includes zero pulse detector, zero pulse detector is used for measuring transmission shafting front end zero pulse time or transmission shafting rear end zero pulse time.
2. The wind generating set transmission shaft torsional vibration protection device according to claim 1, wherein the transmission shafting comprises a gear box (2), a main shaft (3) connected to the front end of the gear box (2), and a coupler (4) connected to the rear end of the gear box (2), and the zero pulse detector is respectively installed on the main shaft (3) and the coupler (4).
3. The torsional vibration protection device for the transmission shaft of the wind generating set according to claim 2, wherein the transmission shaft system comprises a wind wheel (5) connected to one end of the main shaft (3) far away from the gear box (2), and a generator (6) connected to one end of the coupler (4) far away from the gear box (2).
4. The wind turbine generator system drive shaft torsional vibration protection device according to any one of claims 1 to 3, wherein the measuring device (1) further comprises a rotation speed sensor for measuring a rotation speed of a front end of the drive shaft or a rotation speed of a rear end of the drive shaft.
5. A wind generating set transmission shaft torsional vibration protection method is characterized in that the wind generating set transmission shaft torsional vibration protection device of claim 4 is utilized, and the method comprises the following steps:
s1, acquiring the rotating speed omega at two ends of the transmission shaft system by using the rotating speed sensor1And ω2(ii) a And; zero pulse detector is utilized to obtain zero time T of each rotation of two ends of transmission shaft system1And T2(ii) a Wherein, ω is1Is the front-end rotation speed of the transmission shaft system, omega2Is the rear end rotation speed, T, of the drive shaft system1Is the time of the zero pulse at the front end of the drive shaft system, T2Is the time of the zero pulse at the rear end of the transmission shaft system;
s2, according to the rotating speed omega at two ends of the transmission shaft system1And ω2And calculating to obtain the input torque of the whole transmission shafting, wherein the calculation formula is as follows:
Figure FDA0003548934900000021
wherein Q isinThe input torque is the input torque of the transmission shafting, and J is the equivalent moment of inertia of the transmission shafting;
and;
according to zero time T of each rotation circle at two ends of a transmission shaft system1And T2Calculating the relative torsion angle of the front end and the rear end of the transmission shaft, wherein the calculation formula is as follows:
ΔT＝T2-T1 (2)，
Δψ＝ΔT×ω2 (3)；
wherein, the delta T is the zero pulse time difference between the front end of the transmission shaft system and the rear end of the transmission shaft system, and the delta psi is the relative torsion angle between the front end of the transmission shaft system and the rear end of the transmission shaft system;
s3, setting the maximum allowable input torque of the transmission shaft system to be QmaxAnd the maximum allowable relative torsion angle of the transmission shaft system is psimaxAnd setting protection logic for controlling the wind generating set to perform power reduction operation or shutdown.
6. The method for protecting the torsional vibration of the transmission shaft of the wind generating set according to claim 5, wherein in step S3, the following steps are set: if Qin＞f1×QmaxThen the wind generating set carries out power reduction operation; wherein f is1In the range of [0.8, 1.1%]。
7. The method for protecting the torsional vibration of the transmission shaft of the wind generating set according to claim 6, wherein in step S3, the following steps are set: if Δ ψ > f1×ψmaxAnd then the wind generating set performs power reduction operation.
8. The method for protecting the torsional vibration of the transmission shaft of the wind generating set according to claim 7, wherein in step S3, the following steps are set: if Qin＞f2×QmaxIf so, stopping the wind generating set; wherein f is2In the range of [0.9, 1.2%]。
9. The method of claim 8The method for protecting the torsional vibration of the transmission shaft of the wind generating set is characterized in that in the step S3, the following steps are set: if Δ ψ > f2×ψmaxAnd when the wind generating set is in use, the wind generating set is stopped.
10. A method according to claim 8 or 9, wherein f is the torsional vibration protection of a drive shaft of a wind turbine generator system1Is 0.8, f2Is 0.9.
CN202210256832.4A 2022-03-16 2022-03-16 Wind generating set transmission shaft torsional vibration protection device and method Pending CN114593012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210256832.4A CN114593012A (en) 2022-03-16 2022-03-16 Wind generating set transmission shaft torsional vibration protection device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210256832.4A CN114593012A (en) 2022-03-16 2022-03-16 Wind generating set transmission shaft torsional vibration protection device and method

Publications (1)

Publication Number Publication Date
CN114593012A true CN114593012A (en) 2022-06-07

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