CN113992084A - Method, system, device and medium for inhibiting generator vibration - Google Patents
Method, system, device and medium for inhibiting generator vibration Download PDFInfo
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- CN113992084A CN113992084A CN202111626649.0A CN202111626649A CN113992084A CN 113992084 A CN113992084 A CN 113992084A CN 202111626649 A CN202111626649 A CN 202111626649A CN 113992084 A CN113992084 A CN 113992084A
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- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/44—Control of frequency and voltage in predetermined relation, e.g. constant ratio
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Abstract
The invention discloses a method, a system, a device and a medium for inhibiting generator vibration. Therefore, through the mode of judging the stator power in advance and performing feed-forward compensation based on the judgment result, the slip frequency fluctuation of the generator stator power can be inhibited, the problems that the three-phase magnetic circuit is asymmetric and slip rate vibration is generated in operation due to deviation in the manufacturing process of a generator rotor are solved, the vibration of a generator and a fan transmission chain is reduced, equipment on the transmission chain is protected, abrasion is reduced, the safety allowance of the fan is improved, and the service life of the generator is prolonged.
Description
Technical Field
The invention relates to the field of engine safety protection, in particular to a method, a system, a device and a medium for inhibiting generator vibration.
Background
The doubly-fed wind generating set is a main device for land power generation, and low-frequency vibration generated in the running process of a generator directly influences the safety and the service life of the generator. At present, the vibration of slip ratio caused by asymmetry of magnetic circuit can make the power output of stator of generator unstable. In the prior art, the vibration can be avoided by controlling a PI (proportional integral) parameter of the power loop, but the vibration of the slip cannot be suppressed, and especially when the vibration frequency of the slip is low, the vibration amplitude of the generator is very large, which may affect the normal operation of the generator, and even may affect the service life of the generator.
Disclosure of Invention
The invention aims to provide a method, a system, a device and a medium for inhibiting the vibration of a generator, which can inhibit the slip frequency fluctuation of the power of a stator of the generator, solve the problems of asymmetric three-phase magnetic circuits and slip rate vibration generated in operation due to the deviation in the manufacturing process of a rotor of the generator, thereby reducing the vibration of the generator and a transmission chain of a fan, protecting equipment on the transmission chain, reducing the abrasion, improving the safety allowance of the fan and prolonging the service life of the generator.
In order to solve the above technical problem, the present invention provides a method for suppressing generator vibration, comprising:
acquiring the stator power of the generator in each slip period in a window period;
judging whether the change of the stator power exceeds a preset amplitude value in the window period;
if so, obtaining an expected value of the stator power fluctuation component of the next revolution difference period based on the stator power in the window period;
and generating compensation power based on the expected value, and enabling a doubly-fed converter to carry out feed-forward control on the stator power of the generator based on the compensation power so as to counteract the fluctuation component of the stator power of the next slip period, so that the stator power is kept stable.
Preferably, before obtaining the stator power of the generator in each slip cycle, the method further includes:
judging whether the wind speed is stable and whether the generator operates stably in a preset time period;
and if the wind speed is stable and the generator stably runs, taking the preset time period as the window period, and entering the step of acquiring the stator power of the generator in each slip period.
Preferably, the judging whether the generator is stably operated includes:
judging whether the change amplitude of the rotating speed and the input power of the generator in the preset time period exceeds a preset value or not;
if so, judging that the generator is unstable in operation;
and if not, judging that the generator operates stably.
Preferably, obtaining the stator power of the generator in each slip cycle comprises:
acquiring the output voltage, the output current and the real-time slip angle of the generator in each slip period;
and obtaining the maximum value and the minimum value of the stator power of the generator and the real-time slip angle corresponding to the stator power based on the output voltage and the output current.
Preferably, obtaining the stator power of the generator in each slip cycle comprises:
acquiring the maximum value and the minimum value of the stator power in each slip period;
recording a first slip angle corresponding to the maximum value and a second slip angle corresponding to the minimum value;
deriving an expected value of the stator power fluctuation component for a next slip period based on the stator power within the window period, comprising:
obtaining an expected value of the stator power fluctuation component for a next slip period based on the maximum value, the minimum value, the first slip angle, and the second slip angle.
Preferably, generating a compensation power based on the expected value comprises:
adding the first slip angle and the second slip angle and dividing the sum by 2 to obtain an initial phase value of the slip angle;
generating a compensation power based on the maximum value, the minimum value, the slip angle initial phase value and a first relation;
the first relation is:
；
wherein the content of the first and second substances,
for the purpose of said compensation of the power,
is the absolute value of the maximum value,
is the absolute value of the minimum value and,
for the magnitude of the compensation power,
is the slip angle of the generator rotor,
to be the initial phase value of the slip angle,
and the value is the proper value of the slip angle of the generator rotor.
Preferably, generating a compensation power based on the expected value comprises:
generating the compensation power based on the maximum value, the minimum value, the first slip angle, the second slip angle and a second relation;
the second relation is:
wherein the content of the first and second substances,
for the magnitude of the compensation power,
is the absolute value of the maximum value,
is the absolute value of the minimum value and,
to be the initial phase value of the slip angle,
is an appropriate value for the slip angle of the generator rotor,
for the purpose of said compensation of the power,
for the first slip angle to be said,
is the second slip angle.
In order to solve the above technical problem, the present application further provides a system for suppressing vibration of a generator, including:
the parameter acquisition unit is used for acquiring the stator power of the generator in each slip period in a window period;
the judging unit is used for judging whether the change of the stator power exceeds a preset amplitude value in the window period;
the calculation unit is used for obtaining an expected value of the stator power fluctuation component of the next revolution difference period based on the stator power in the window period when the change of the stator power exceeds the preset amplitude;
and the control unit is used for generating compensation power based on the expected value and enabling the doubly-fed converter to carry out feed-forward control on the stator power of the generator based on the compensation power so as to counteract the fluctuation component of the stator power in the next slip period and enable the stator power to be stable.
In order to solve the above technical problem, the present application further provides a device for suppressing vibration of a generator, including:
a memory for storing a computer program;
a processor for, when storing said computer program, implementing the steps of the method of suppressing generator vibrations as described above.
In order to solve the above technical problem, the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for suppressing generator vibration described above.
In the scheme, the stator power of the generator in a slip period is obtained, when the change of the stator power exceeds a preset amplitude value, an expected numerical value of a stator power fluctuation component of the next slip period is obtained, and then the expected numerical value is compensated based on the expected numerical value so as to offset a periodic disturbance component of the stator power and keep the stator power stable. Therefore, through the mode of judging the stator power in advance and performing feed-forward compensation based on the judgment result, the slip frequency fluctuation of the generator stator power can be inhibited, the problems that the three-phase magnetic circuit is asymmetric and slip rate vibration is generated in operation due to deviation in the manufacturing process of a generator rotor are solved, the vibration of a generator and a fan transmission chain is reduced, equipment on the transmission chain is protected, abrasion is reduced, the safety allowance of the fan is improved, and the service life of the generator is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for suppressing generator vibration according to the present invention;
FIG. 2 is a block diagram of a system for suppressing generator vibration according to the present invention;
fig. 3 is a block diagram of a device for suppressing generator vibration according to the present invention.
Detailed Description
The core of the invention is to provide a method, a system, a device and a medium for inhibiting the vibration of a generator, which can inhibit the slip frequency fluctuation of the power of a stator of the generator, solve the problems of asymmetric three-phase magnetic circuits and slip rate vibration generated in operation caused by the deviation in the manufacturing process of a rotor of the generator, thereby reducing the vibration of the generator and a transmission chain of a fan, protecting equipment on the transmission chain, reducing the abrasion, improving the safety allowance of the fan and prolonging the service life of the generator.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for suppressing generator vibration according to the present invention, the method includes:
s11: in a window period, obtaining the stator power of the generator in each slip period;
in consideration of the fact that in the prior art, only vibration can be avoided by reducing the adjusting speed of the PI parameter of the power loop, and the vibration cannot be suppressed. In addition, the response of controlling the stator power is slowed down by a simple parameter-slowing method, and the service life of equipment on a transmission chain is reduced invisibly.
In order to solve the above problems, the design idea of the present application is: when slip frequency vibration occurs in the generator, so that the stator power of the generator has larger fluctuation components, the function of the slip frequency components is calculated in window time under the proper working condition of the fan, and accordingly, compensation power is calculated and applied to the periodic feedforward control of the stator power, so that the fluctuation components of the specific frequency of the stator power are eliminated.
Based on this, one step to be performed first in the present application is to acquire the stator power of the generator in one slip period, so as to perform analysis, calculation, and the like based on the acquired stator power in the following.
As a preferred embodiment, obtaining the stator power of the generator in each slip cycle comprises:
acquiring the output voltage, the output current and the real-time slip angle of the generator in each slip period;
and obtaining the maximum value and the minimum value of the stator power of the generator and the real-time slip angle corresponding to the stator power based on the output voltage and the output current.
The stator power may be obtained by, but not limited to, obtaining an output voltage and an output current of the generator, and then calculating the stator power based on the voltage and the current. The manner of obtaining the output voltage of the generator may be, but is not limited to, detecting the output voltage of the generator using a voltage detection module, and the manner of obtaining the output current of the generator may be, but is not limited to, detecting the output current of the generator using a current detection module.
It should be noted that the slip period is defined in this embodiment because: when the generator has slip ratio vibration, the vibration is a cycle and periodic vibration, the vibration exists in each period, and the vibration is basically the same, so that the fluctuation in all the periods can be analyzed by only obtaining the stator power in one period, namely, the fluctuation in all the periods can be predicted by only obtaining the amplitude, the phase and the corresponding slip angle of the slip cycle fluctuation component of the stator power, and the stator power in a long time does not need to be repeatedly obtained.
In addition, the time for acquiring the stator power of one period in the application can be when the generator is just powered on and started, or can be the time for acquiring the stator power of one period when a user instruction is received in the operation process, so that the stator power is prevented from being acquired for a long time, and the power consumption of the whole system is further reduced.
As a preferred embodiment, before obtaining the stator power of the generator in each slip cycle, the method further includes:
judging whether the wind speed is stable and whether the generator operates stably in a preset time period;
and if the wind speed is stable and the generator stably runs, taking a preset time period as a window period, and entering a step of acquiring the stator power of the generator in each slip period.
Further, considering that the obtained stator power may fluctuate very much when the wind speed is unstable and the generator is not stable, it is difficult to distinguish whether the stator power fluctuates due to the fact that the generator does not reach a stable operation or the stator power fluctuates due to the vibration of the slip ratio. When the obtained stator power is used as a basis for subsequent analysis and calculation of the compensation power, the calculated compensation power is likely to be inaccurate, and the compensated stator power is likely to be unstable when the inaccurate compensation power is applied to control of the stator power.
Therefore, before the stator power is obtained, whether the wind speed is stable or not and whether the generator operates stably or not are judged, and the stator power is obtained only when the generator operates stably.
As a preferred embodiment, the determining whether the generator is operating stably includes:
judging whether the change amplitude of the rotating speed and the input power of the generator in a preset time period exceeds a preset value or not;
if so, judging that the generator is unstable in operation;
if not, the generator is judged to be stably operated.
Specifically, the specific manner for determining whether the generator stably operates may be: and judging whether the variation amplitude of the rotating speed and the input power of the generator in the preset time exceeds a preset value, namely judging whether the rotating speed and the input power of the generator are stable, if so, judging that the generator operates stably, and otherwise, judging that the generator operates unstably.
Considering that the wind power generator works outdoors and the wind power factor is not controllable, it is also necessary to determine whether the wind speed is stable, and the specific manner of determining whether the wind speed is stable is not limited in this application.
The input power of the generator can be but is not limited to the given power of the generator, the given power is a parameter given to the generator through the upper computer, the purpose is to enable the output power of the generator to be the given power, and the given power can also be understood as a target power or a desired power.
In addition, the preset value can be determined according to actual conditions, and the smaller the preset value is, the more accurate the obtained stator power in one period is.
Therefore, whether the generator stably runs or not can be judged through the rotating speed and the given power of the generator, and the accuracy of judgment through the two parameters is higher.
In conclusion, the situation that the stator power is obtained when the wind speed is unstable or the generator is unstable in operation can be avoided through the method, and therefore the generated compensation power is prevented from being inaccurate.
S12: judging whether the change of the sub-power exceeds a preset amplitude value within a window period;
after the stator power in one period is acquired, ideally, the stator power should be a stable value within a certain range, and whether slip vibration exists is judged by judging whether the change of the stator power exceeds a preset amplitude value.
S13: if so, obtaining an expected value of the stator power fluctuation component of the next revolution difference period based on the stator power in the window period;
specifically, when the variation of the stator power exceeds the preset amplitude, it is determined that there is a slip vibration, and the stator power needs to be compensated to keep the stator power stable and avoid low-frequency power fluctuation. At this time, the specific way of generating the compensation power is as follows: and predicting the variation trend of the stator power of the next revolution difference period based on the trend of the stator power variation in the window period, and further predicting the expected value of the stator power fluctuation component in the next revolution difference period.
Specifically, assuming that the stator power changes in the window period and the change rule conforms to the change rule of the sine-cosine function, the change of the stator power in the next difference period is predicted based on the change rule of the sine-cosine function (which can also be understood as a historical change trend), so that an expected value of the stator power fluctuation component can be calculated.
The above-mentioned rules of sine and cosine functions are just an example for easy understanding, and the specific variation trend of the stator power depends on the actually collected historical data (i.e. the case of the stator power in the window period), and is not limited to the above-mentioned example.
S14: and generating compensation power based on the expected value, and enabling the doubly-fed converter to carry out feedforward control on the stator power of the generator based on the compensation power so as to counteract the fluctuation component of the stator power of the next slip period and keep the stator power stable.
After the expected value of the stator power fluctuation component of the next slip period is obtained, compensation power is generated based on the expected value, and the bidirectional converter is subjected to feed-forward compensation based on the compensation power so as to counteract the stator power fluctuation component of the next slip period, so that the stator power of the generator is kept stable.
Specifically, the feedforward compensation control in the present application is: and the generated compensation power is superposed to the original given power through a feedforward channel, and the doubly-fed converter acts based on the new given power (the sum of the compensation power and the original given power) so as to keep the output stator power stable.
The variation trend of the generated compensation power is opposite to that of the stator power, so that when the compensation power is applied to the stator power, the stator power is stabilized at a stable value within a certain range under an ideal state.
As a preferred embodiment, obtaining the stator power of the generator in each slip cycle comprises:
acquiring the maximum value and the minimum value of the stator power in each slip period;
recording a first slip angle corresponding to the maximum value and a second slip angle corresponding to the minimum value;
obtaining an expected value of the stator power fluctuation component for the next slip period based on the stator power in the window period, including:
and obtaining an expected value of the stator power fluctuation component of the next slip period based on the maximum value, the minimum value, the first slip angle and the second slip angle.
Specifically, the specific manner of obtaining the stator power may be that a fluctuation trend of the stator power in a slip period is represented by a maximum value of the stator power in the slip period and a first slip angle corresponding to the maximum value, and a second slip angle corresponding to the minimum value and the minimum value, and a fluctuation component of a next slip period is predicted based on the maximum value, the minimum value, the first slip angle corresponding to the maximum value, and the second slip angle corresponding to the minimum value, so as to obtain an expected value of the stator power fluctuation component of the next slip period, where the slip angle represents an angle value that the engine rotor has rotated in the period.
The stator power of the current slip period is analyzed in the embodiment to predict the fluctuation component of the next slip period, so that the compensation power is generated in advance to compensate the fluctuation component.
As a preferred embodiment, generating the compensation power based on the expected value includes:
adding the first slip angle and the second slip angle, dividing by 2, and averaging to obtain the initial phase value of the slip angle
0；
Generating compensation power based on the maximum value, the minimum value, the slip angle difference value and the first relation;
the first relation is:
；
wherein the content of the first and second substances,
in order to compensate for the power,
is the maximum value (absolute value),
is the minimum value (absolute value),
in order to compensate for the magnitude of the power,
is the slip angle of the generator rotor,
to be the initial phase value of the slip angle,
the slip angle adaptive value of the generator rotor is obtained.
Considering that the fluctuation of the stator power is generally sinusoidal, in this embodiment, the compensation power of a cosine equation is calculated based on the maximum value, the minimum value, the first slip angle and the second slip angle, and the amplitude and the phase of the cosine equation need to be known. The amplitude in this embodiment is defined as the average of the maximum and minimum values and the initial phase is defined as the average of the first and second slip angles.
Therefore, the method in this embodiment can accurately obtain the initial values of the amplitude and the phase of the vibration, and then generate a cosine type compensation power to perform feed-forward compensation on the stator power in the next slip period, so that the stator power is kept stable in the next slip period.
As a preferred embodiment, generating the compensation power based on the expected value includes:
generating compensation power based on the maximum value, the minimum value, the first slip angle, the second slip angle and the second relation;
the second relation is:
wherein the content of the first and second substances,
for the magnitude of the compensation power,
is the absolute value of the maximum value,
is the absolute value of the minimum value and,
to be the initial phase value of the slip angle,
is an appropriate value for the slip angle of the generator rotor,
for the purpose of said compensation of the power,
for the first slip angle to be said,
the second slip angle is the amplitude of the compensation power, is a maximum value (absolute value), is a minimum value (absolute value), and corresponds to the maximum value and the minimum value.
Considering that the fluctuation of the stator power is generally sinusoidal, in this embodiment, a sinusoidal compensation power is calculated based on the maximum value, the minimum value, the first slip angle and the second slip angle, and the sinusoidal amplitude and phase need to be known. The amplitude in the present embodiment is defined as 1/2 which is the sum of the maximum value and the minimum value as the compensation power amplitude, and the initial value of the slip angle at that time (the average value of the first slip angle and the second slip angle) is calculated.
Therefore, the method in this embodiment can accurately obtain the amplitude and the initial phase of the vibration, and then generate a sinusoidal compensation power to perform feed-forward compensation on the stator power in the next slip period, so that the stator power is kept stable in the next slip period.
It should be noted that when the compensation power is applied to a power loop for controlling the doubly-fed converter, because the fluctuation conditions in each period are the same, the compensation power is correspondingly controlled in each period, so that the stator power is prevented from generating periodic fluctuation, and the generator is prevented from generating periodic vibration.
In conclusion, the method for judging the stator power in advance and performing feed-forward compensation based on the judgment result can inhibit slip frequency fluctuation of the generator stator power, solve the problem that the three-phase magnetic circuit is asymmetric due to deviation in the manufacturing process of a generator rotor and slip rate vibration is generated in operation, reduce vibration of a generator and a fan transmission chain, protect equipment on the transmission chain, reduce abrasion, improve safety allowance of the fan, enable the stator power of the generator to be stable, avoid overlarge vibration amplitude of the generator due to the vibration of the slip rate, further avoid influence on normal operation of the generator, and prolong the service life of the generator.
Referring to fig. 2, fig. 2 is a block diagram of a system for suppressing generator vibration according to the present invention, the system includes:
the parameter obtaining unit 21 is configured to obtain a stator power of the generator in each slip period in a window period;
a judging unit 22 for judging whether the variation of the sub-power exceeds a preset amplitude value during the window period;
the calculating unit 23 is configured to obtain an expected value of the stator power fluctuation component of the next difference period based on the stator power in the window period when the change of the stator power exceeds the preset amplitude;
and the control unit 24 is used for generating compensation power based on the expected value and enabling the doubly-fed converter to carry out feed-forward control on the stator power of the generator based on the compensation power so as to counteract the fluctuation component of the stator power of the next slip period and enable the stator power to be stable.
For solving the above technical problem, the present application further provides a system for suppressing generator vibration, and for the introduction of the system for suppressing generator vibration, please refer to the above embodiments, which is not described herein again.
Referring to fig. 3, fig. 3 is a block diagram of a structure of a device for suppressing generator vibration according to the present invention, the device includes:
a memory 31 for storing a computer program;
a processor 32 for implementing the steps of the above-described method of suppressing generator vibration when storing a computer program.
For solving the above technical problem, the present application further provides a device for suppressing generator vibration, and for the introduction of the device for suppressing generator vibration, please refer to the above embodiments, which is not described herein again.
In order to solve the above technical problem, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the above method for suppressing the vibration of the generator.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of suppressing generator vibration, comprising:
acquiring the stator power of the generator in each slip period in a window period;
judging whether the change of the stator power exceeds a preset amplitude value in the window period;
if so, obtaining an expected value of the stator power fluctuation component of the next revolution difference period based on the stator power in the window period;
and generating compensation power based on the expected value, and enabling a doubly-fed converter to carry out feed-forward control on the stator power of the generator based on the compensation power so as to counteract the fluctuation component of the stator power of the next slip period, so that the stator power is kept stable.
2. The method of suppressing generator vibration as recited in claim 1, further comprising, prior to obtaining stator power for the generator during each slip cycle:
judging whether the wind speed is stable and whether the generator operates stably in a preset time period;
and if the wind speed is stable and the generator stably runs, taking the preset time period as the window period, and entering the step of acquiring the stator power of the generator in each slip period.
3. The method of suppressing generator vibration as recited in claim 2, wherein determining whether the generator is operating stably comprises:
judging whether the change amplitude of the rotating speed and the input power of the generator in the preset time period exceeds a preset value or not;
if so, judging that the generator is unstable in operation;
and if not, judging that the generator operates stably.
4. The method of suppressing generator vibration as recited in claim 1, wherein obtaining stator power of the generator for each slip cycle comprises:
acquiring the output voltage, the output current and the real-time slip angle of the generator in each slip period;
and obtaining the maximum value and the minimum value of the stator power of the generator and the real-time slip angle corresponding to the stator power based on the output voltage and the output current.
5. The method of suppressing generator vibration as recited in any of claims 1-4, wherein obtaining stator power of the generator for each slip cycle comprises:
acquiring the maximum value and the minimum value of the stator power in each slip period;
recording a first slip angle corresponding to the maximum value and a second slip angle corresponding to the minimum value;
deriving an expected value of the stator power fluctuation component for a next slip period based on the stator power within the window period, comprising:
obtaining an expected value of the stator power fluctuation component for a next slip period based on the maximum value, the minimum value, the first slip angle, and the second slip angle.
6. The method of suppressing generator vibration of claim 5, wherein generating a compensation power based on the expected value comprises:
adding the first slip angle and the second slip angle and dividing the sum by 2 to obtain an initial phase value of the slip angle;
generating a compensation power based on the maximum value, the minimum value, the slip angle initial phase value and a first relation;
the first relation is:
；
wherein the content of the first and second substances,
for the purpose of said compensation of the power,
is the absolute value of the maximum value,
is the absolute value of the minimum value and,
for the magnitude of the compensation power,
is the slip angle of the generator rotor,
to be the initial phase value of the slip angle,
and the value is the proper value of the slip angle of the generator rotor.
7. The method of suppressing generator vibration of claim 5, wherein generating a compensation power based on the expected value comprises:
generating the compensation power based on the maximum value, the minimum value, the first slip angle, the second slip angle and a second relation;
the second relation is:
wherein the content of the first and second substances,
for the magnitude of the compensation power,
is the absolute value of the maximum value,
is the absolute value of the minimum value and,
for the initial phase of slip angleThe value of the one or more of the one,
is an appropriate value for the slip angle of the generator rotor,
for the purpose of said compensation of the power,
for the first slip angle to be said,
is the second slip angle.
8. A system for suppressing vibration of a generator, comprising:
the parameter acquisition unit is used for acquiring the stator power of the generator in each slip period in a window period;
the judging unit is used for judging whether the change of the stator power exceeds a preset amplitude value in the window period;
the calculation unit is used for obtaining an expected value of the stator power fluctuation component of the next revolution difference period based on the stator power in the window period when the change of the stator power exceeds the preset amplitude;
and the control unit is used for generating compensation power based on the expected value and enabling the doubly-fed converter to carry out feed-forward control on the stator power of the generator based on the compensation power so as to counteract the fluctuation component of the stator power in the next slip period and enable the stator power to be stable.
9. An apparatus for suppressing vibration of a generator, comprising:
a memory for storing a computer program;
a processor for carrying out the steps of the method of suppressing generator vibrations according to any one of claims 1 to 7 when storing said computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of suppressing generator vibrations according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111626649.0A CN113992084B (en) | 2021-12-29 | 2021-12-29 | Method, system, device and medium for inhibiting generator vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111626649.0A CN113992084B (en) | 2021-12-29 | 2021-12-29 | Method, system, device and medium for inhibiting generator vibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113992084A true CN113992084A (en) | 2022-01-28 |
| CN113992084B CN113992084B (en) | 2022-04-01 |
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