CN117293861A - Wind turbine generator energy storage control method, device, equipment and storage medium - Google Patents
Wind turbine generator energy storage control method, device, equipment and storage medium Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/007—Systems for storing electric energy involving storage in the form of mechanical energy, e.g. fly-wheels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
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Abstract
The embodiment of the invention provides an energy storage control method, device and equipment for a wind turbine generator and a storage medium, and belongs to the technical field of wind power generation. The energy storage control method of the wind turbine generator comprises the following steps: acquiring electric energy information stored in a flywheel in a wind turbine generator, electric energy information stored in a super capacitor and current power grid frequency; determining a current power grid state based on the current power grid frequency; and based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor, regulating the power of the wind turbine generator by using the flywheel and/or the super capacitor so as to ensure the stability of the power grid frequency. The embodiment of the invention utilizes the flywheel and the super capacitor to adjust the power of the wind turbine generator so as to ensure the stable frequency of the power grid and improve the generating efficiency and the resource utilization rate of the wind turbine generator.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind turbine energy storage control method, a wind turbine energy storage control device, electronic equipment and a readable storage medium.
Background
Wind power generation and photovoltaic power generation are taken as two most popular power generation modes at present, wind energy and solar energy are respectively taken as energy sources for providing electric energy for a power grid, and the wind energy and the solar energy are easily influenced by natural environment, so that instability exists in the frequency of the power grid. With the large-scale access of wind power generation and photovoltaic power generation to the power grid, the influence of the wind power generation and the photovoltaic power generation on the safe and stable operation of the power grid is not ignored.
In the prior art, the energy storage system is usually utilized to carry out compensation adjustment on the fluctuation power of new energy, most of the wind turbine generator frequency is adjusted by a single flywheel or single chemical energy, the method can not meet the requirement of stabilizing the power grid frequency, and the chemical energy adjustment is easy to have the risk of environmental pollution.
Disclosure of Invention
The embodiment of the invention aims to provide an energy storage control method, device and equipment for a wind turbine generator and a storage medium, so as to solve the technical problems.
In order to achieve the above object, an embodiment of the present invention provides a method for controlling energy storage of a wind turbine, where the method includes:
acquiring electric energy information stored in a flywheel in a wind turbine generator, electric energy information stored in a super capacitor and current power grid frequency;
determining a current power grid state based on the current power grid frequency; the current power grid state comprises a power grid frequency too low state, a power grid frequency too high state and a power grid frequency stable state;
and adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor so as to ensure the stability of the power grid frequency.
Optionally, the method further comprises:
keeping the electric energy stored in the flywheel in the wind turbine generator set to be larger than a first preset electric energy value;
keeping the electric energy stored by the super capacitor in the wind turbine generator set smaller than a second preset electric energy value; wherein the first preset electrical energy value is greater than the second preset electrical energy value.
Optionally, the determining, based on the current grid frequency, a current grid state includes:
determining that the current power grid frequency is smaller than the standard power grid frequency, and judging the current power grid state as a power grid frequency too low state;
the adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor comprises the following steps:
if the current power grid state is the power grid frequency too low state, the power generation power of the wind turbine generator is increased to the standard power generation power by utilizing the electric energy stored in the flywheel; the standard power generation power is the power generation power which is obtained by predicting the current power grid by using a power prediction model and corresponds to the current power grid stability.
Optionally, the determining, based on the current grid frequency, a current grid state includes:
determining that the current power grid frequency is greater than the standard power grid frequency, and judging the current power grid state as a power grid frequency overhigh state;
the method for adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor further comprises the following steps:
if the current power grid state is the power grid frequency too high state, storing electric energy corresponding to the exceeding value of the current wind turbine by using the super capacitor so as to reduce the power generation power of the wind turbine to the standard power generation power; and the current wind turbine generator set exceeding value is an exceeding value of the generating power of the current wind turbine generator set exceeding standard generating power.
Optionally, the determining, based on the current grid frequency, a current grid state includes:
determining that the current power grid frequency is equal to the standard power grid frequency, and judging the current power grid state as a power grid frequency stable state;
the adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor comprises the following steps:
if the current power grid state is the power grid frequency stable state, electric energy exceeding a second preset electric energy value in the super capacitor is input into the flywheel for storage.
In a second aspect of the embodiment of the present invention, there is provided an energy storage control device for a wind turbine, the device including:
the data acquisition module is used for acquiring electric energy information stored in a flywheel in the wind turbine generator, electric energy information stored in a super capacitor and current power grid frequency;
the state determining module is used for determining the current power grid state based on the current power grid frequency; the current power grid state comprises a power grid frequency too low state, a power grid frequency too high state and a power grid frequency stable state;
and the energy storage adjusting module is used for adjusting the power of the wind turbine generator by utilizing the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor so as to ensure the stability of the power grid frequency.
Optionally, the state determining module is specifically configured to:
determining that the current power grid frequency is smaller than the standard power grid frequency, and judging the current power grid state as a power grid frequency too low state;
determining that the current power grid frequency is greater than the standard power grid frequency, and judging the current power grid state as a power grid frequency overhigh state;
and if the current power grid frequency is equal to the standard power grid frequency, judging the current power grid state as a power grid frequency stable state.
Optionally, the energy storage distribution module is specifically configured to:
if the current power grid state is the power grid frequency too low state, the power generation power of the wind turbine generator is increased to the standard power generation power by utilizing the electric energy stored in the flywheel; the standard power generation power is the power generation power which is obtained by prediction of a power prediction model and corresponds to the current power grid stability;
if the current power grid state is the power grid frequency too high state, storing electric energy corresponding to the exceeding value of the current wind turbine by using the super capacitor so as to reduce the power generation power of the wind turbine to the standard power generation power; and the current wind turbine generator set exceeding value is an exceeding value of the generating power of the current wind turbine generator set exceeding standard generating power.
A third aspect of the present application provides an electronic device configured to execute the wind turbine energy storage control method described above.
A fourth aspect of the present application provides a machine-readable storage medium having stored thereon instructions that, when executed by a processor, are configured by the processor to perform the wind turbine energy storage control method described above.
According to the embodiment of the invention, the current power grid state is determined based on the current power grid frequency by acquiring the electric energy information stored by the flywheel, the electric energy information stored by the super capacitor and the current power grid frequency in the wind turbine, and the power of the wind turbine is regulated by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor so as to ensure the stability of the power grid frequency. The embodiment of the invention utilizes the flywheel and the super capacitor to adjust the power of the wind turbine generator so as to ensure the stable frequency of the power grid and improve the generating efficiency and the resource utilization rate of the wind turbine generator.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 is a schematic flow chart of a wind turbine energy storage control method provided by an embodiment of the invention;
fig. 2 is a schematic diagram of an architecture of an energy storage control device of a wind turbine according to an embodiment of the present invention.
Description of the reference numerals
210 a data acquisition module; 220 a state determination module; 230 an energy storage regulation module;
241 flywheel energy storage module; 242 super capacitor energy storage module; 250 power divider;
260 an energy storage transformer; 270 an energy storage inverter; 280AGC system;
290 power prediction system.
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Example 1
Referring to fig. 1, fig. 1 is a flow chart of a wind turbine energy storage control method according to the present embodiment.
Step S100: and acquiring electric energy information stored by a flywheel in the wind turbine generator, electric energy information stored by a super capacitor and current power grid frequency.
It should be understood that, in this embodiment, in order to keep the frequency of the power grid stable, the flywheel and the super capacitor are connected in parallel and then connected into the power grid, the flywheel is used for providing electric energy for the wind turbine, and the super capacitor is used for receiving electric energy corresponding to the excess value of the wind turbine, so that the electric energy stored in the flywheel is kept above a first preset electric energy value, so that the power grid is powered when the frequency of the power grid is too low, the electric energy in the super capacitor is kept below a second preset electric energy value, namely, the state to be charged is kept, and the electric energy corresponding to the excess value of the wind turbine is received when the frequency of the power grid is too high. The first preset electric energy value may be 50% of the maximum stored electric energy value of the flywheel, and the second preset electric energy value may be approximately 0.
Step S200: determining a current power grid state based on the current power grid frequency; the current power grid state comprises a power grid frequency too low state, a power grid frequency too high state and a power grid frequency stable state.
Specifically, comparing the current power grid frequency with the standard power grid frequency, and if the current power grid frequency is smaller than the standard power grid frequency, judging the current power grid state as a power grid frequency too low state; if the current power grid frequency is higher than the standard frequency, judging the current power grid state as a power grid frequency overhigh state; and if the current power grid frequency is equal to the standard power grid frequency, judging the current power grid frequency as a power grid frequency stable state. The standard grid frequency can be set by the wind turbine generator system, and is not limited in this embodiment.
Step S300: and based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor, regulating the power of the wind turbine generator by using the flywheel and/or the super capacitor so as to ensure the stability of the power grid frequency.
It can be understood that the power grid frequency is determined by the generated power and the power load, and when the generated power and the power load are equal in size, the power grid frequency is stable; when the generated power is larger than the power utilization load, the power grid frequency power rises; when the generated power is smaller than the electric load, the grid frequency is reduced. According to the embodiment, the power prediction model is utilized to predict the power generation power of the power grid so as to obtain the corresponding predicted power generation power when the power grid is stable at each time in the future, and the predicted power generation power is used as the standard power generation power at the time so as to provide a data base for subsequent energy storage adjustment.
Specifically, when the current power grid state is determined to be the power grid frequency too low state, the electric energy stored in the flywheel is input into the wind turbine generator to increase the generated power to the standard power, and the power grid frequency is further enabled to be equal to the standard power grid frequency; when the current power grid state is determined to be in a power grid frequency too high state, inputting electric energy corresponding to an excess value of the power of the current wind turbine generator set exceeding the standard power generation power into a super capacitor for storage so as to reduce the power generation power to the standard power generation power, and further reducing the power grid frequency to the standard power grid frequency; when the current power grid state is determined to be the power grid frequency stable state, electric energy exceeding a second preset electric energy value in the super capacitor is input into the flywheel for storage, so that the electric energy in the super capacitor is kept lower than the second preset electric energy value, and the electric energy stored in the flywheel is kept above the first preset electric energy value for the next power grid frequency modulation use, the utilization rate of wind power resources is improved, and the resource waste is avoided.
According to the embodiment, the current power grid state is determined based on the current power grid frequency by acquiring the electric energy information stored by the flywheel, the electric energy information stored by the super capacitor and the current power grid frequency in the wind turbine, and the power of the wind turbine is regulated by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor so as to ensure the stability of the power grid frequency. The embodiment of the invention utilizes the flywheel and the super capacitor to adjust the power of the wind turbine generator so as to ensure the stable frequency of the power grid and improve the generating efficiency and the resource utilization rate of the wind turbine generator.
Example two
Referring to fig. 2, fig. 2 is a schematic diagram of an architecture of an energy storage control device of a wind turbine according to an embodiment of the present invention.
The data acquisition module 210 is configured to acquire electric energy information stored in a flywheel in the wind turbine generator, electric energy information stored in a super capacitor, and a current power grid frequency.
A state determining module 220, configured to determine a current power grid state based on the current power grid frequency; the current power grid state comprises a power grid frequency too low state, a power grid frequency too high state and a power grid frequency stable state. Specifically, if the state determining module 220 determines that the current grid frequency is less than the standard grid frequency, the current grid state is determined to be a grid frequency too low state; if the current power grid frequency is determined to be larger than the standard power grid frequency, judging the current power grid state as a power grid frequency overhigh state; and if the current power grid frequency is equal to the standard power grid frequency, judging the current power grid state as a power grid frequency stable state.
The energy storage adjusting module 230 is configured to adjust the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel, and the electric energy information stored by the super capacitor, so as to ensure the stability of the power grid frequency. Specifically, if the energy storage adjustment module 230 determines that the current power grid state is a power grid frequency too low state, the power generation power of the wind turbine generator is increased to the standard power generation power by using the electric energy stored in the flywheel; the standard power generation power is power generation power corresponding to the standard power grid frequency. If the current power grid state is determined to be the power grid frequency overhigh state, the super capacitor is used for storing electric energy corresponding to the excess value of the current wind turbine generator, so that the power generation power of the wind turbine generator is reduced to the standard power generation power; the current wind turbine generator set excess value is an excess value of the generation power of the current wind turbine generator set exceeding the standard generation power. In addition, the energy storage adjusting module 230 is further configured to keep the electric energy stored in the flywheel in the wind turbine set greater than a first preset electric energy value; keeping the electric energy stored by the super capacitor in the wind turbine generator set smaller than a second preset electric energy value; and when the current power grid state is determined to be the power grid frequency stable state, inputting the electric energy exceeding the second preset electric energy value in the super capacitor into the flywheel for storage.
It should be understood that, as shown in fig. 2, the overall architecture of the apparatus of this embodiment includes, in addition to the data acquisition module 210, the state determination module 220, and the energy storage adjustment module 230, a flywheel energy storage module 241, a super capacitor energy storage module 242, a power divider 250, an energy storage transformer 260, an energy storage inverter 270, an AGC system 280, and a power prediction system 290. The flywheel energy storage module 241 and the super capacitor energy storage module 242 are connected in parallel to the power grid, the energy storage adjusting module 230 is respectively connected with the flywheel energy storage module 241 and the super capacitor energy storage module 242 to control the flywheel energy storage module 241 and the super capacitor energy storage module 242 to perform power grid frequency modulation, and the flywheel energy storage module 241 is used for storing electric energy; the super power grid energy storage module 232 is configured to receive electric energy corresponding to an excess value of the wind turbine. In the embodiment, two power distributors 250 are provided, and one power distributor 250 is arranged in a circuit formed by connecting the flywheel energy storage module 241 and the super capacitor energy storage module 242 in parallel and is used for regulating and distributing the electric energy of the super capacitor energy storage module 242 and the flywheel energy storage module 241; the second power divider 250 is disposed in the power grid and connected to the wind turbine generator, for controlling grid-connected power of the wind turbine generator. The energy storage transformer 260 is used for changing the ac voltage by using the electromagnetic induction principle, and the energy storage transformer 260 can be 400V to 690V. The energy storage inverter 270 is used for connecting the flywheel energy storage module 241 and the super capacitor energy storage module 242 to an independent power grid system and a power transmission and distribution power grid. It should be understood that, in addition to the active frequency modulation implemented by the wind turbine energy storage control method provided in the first embodiment, the present embodiment also provides a passive frequency modulation mode, that is, a AGC (Automatic Gain Control) system 280 is provided, so as to implement automatic readjustment and allocation of wind turbine power through an automatic control program, that is, a frequency modulation instruction is sent to the energy storage adjustment module 230 to perform frequency modulation, so as to ensure stability of the power grid. The power prediction system 290 stores a power prediction model for predicting the power generated by the wind turbine generator, obtains the predicted power generated at each time in the future, uses the predicted power as the standard power generated at the time, and sends the standard power to the data acquisition module 210 as a data base.
It should be understood that, the apparatus corresponds to the embodiment of the wind turbine generator energy storage control method, and is capable of executing each step related to the embodiment of the method, and specific functions of the apparatus may be referred to the above description, and detailed descriptions are omitted herein for avoiding repetition. The device includes at least one software functional module that can be stored in memory in the form of software or firmware (firmware) or cured in an Operating System (OS) of the device.
Example III
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
Example IV
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with instructions which are used for executing a program with the steps of the wind turbine generator energy storage control method when being executed by a processor.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations of embodiments of the present invention are not described in detail.
In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
It should also be noted that 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 one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (10)
1. The energy storage control method of the wind turbine generator is characterized by comprising the following steps of:
acquiring electric energy information stored in a flywheel in a wind turbine generator, electric energy information stored in a super capacitor and current power grid frequency;
determining a current power grid state based on the current power grid frequency; the current power grid state comprises a power grid frequency too low state, a power grid frequency too high state and a power grid frequency stable state;
and adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor so as to ensure the stability of the power grid frequency.
2. The wind turbine energy storage control method of claim 1, further comprising:
keeping the electric energy stored in the flywheel in the wind turbine generator set to be larger than a first preset electric energy value;
keeping the electric energy stored by the super capacitor in the wind turbine generator set smaller than a second preset electric energy value; wherein the first preset electrical energy value is greater than the second preset electrical energy value.
3. The wind turbine energy storage control method of claim 2, wherein the determining the current grid state based on the current grid frequency comprises:
determining that the current power grid frequency is smaller than the standard power grid frequency, and judging the current power grid state as a power grid frequency too low state;
the adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor comprises the following steps:
if the current power grid state is the power grid frequency too low state, the power generation power of the wind turbine generator is increased to the standard power generation power by utilizing the electric energy stored in the flywheel; the standard power generation power is the power generation power which is obtained by predicting the current power grid by using a power prediction model and corresponds to the current power grid stability.
4. The wind turbine energy storage control method of claim 2, wherein the determining the current grid state based on the current grid frequency comprises:
determining that the current power grid frequency is greater than the standard power grid frequency, and judging the current power grid state as a power grid frequency overhigh state;
the adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor comprises the following steps:
if the current power grid state is the power grid frequency too high state, storing electric energy corresponding to the exceeding value of the current wind turbine by using the super capacitor so as to reduce the power generation power of the wind turbine to the standard power generation power; and the exceeding value is an exceeding value of the generating power of the current wind turbine generator set exceeding the standard generating power.
5. The wind turbine energy storage control method of claim 2, wherein the determining the current grid state based on the current grid frequency comprises:
determining that the current power grid frequency is equal to the standard power grid frequency, and judging the current power grid state as a power grid frequency stable state;
the adjusting the power of the wind turbine generator by using the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor comprises the following steps:
if the current power grid state is the power grid frequency stable state, electric energy exceeding a second preset electric energy value in the super capacitor is input into the flywheel for storage.
6. An energy storage control device for a wind turbine, the device comprising:
the data acquisition module is used for acquiring electric energy information stored in a flywheel in the wind turbine generator, electric energy information stored in a super capacitor and current power grid frequency;
the state determining module is used for determining the current power grid state based on the current power grid frequency; the current power grid state comprises a power grid frequency too low state, a power grid frequency too high state and a power grid frequency stable state;
and the energy storage adjusting module is used for adjusting the power of the wind turbine generator by utilizing the flywheel and/or the super capacitor based on the current power grid state, the electric energy information stored by the flywheel and the electric energy information stored by the super capacitor so as to ensure the stability of the power grid frequency.
7. The wind turbine energy storage control device of claim 6, wherein the state determination module is specifically configured to:
determining that the current power grid frequency is smaller than the standard power grid frequency, and judging the current power grid state as a power grid frequency too low state;
determining that the current power grid frequency is greater than the standard power grid frequency, and judging the current power grid state as a power grid frequency overhigh state;
and if the current power grid frequency is equal to the standard power grid frequency, judging the current power grid state as a power grid frequency stable state.
8. The wind turbine generator energy storage control device of claim 6, wherein the energy storage distribution module is specifically configured to:
if the current power grid state is determined to be the power grid frequency too low state, the power generation power of the wind turbine generator is increased to the standard power generation power by utilizing the electric energy stored in the flywheel; the standard power generation power is the power generation power which is obtained by prediction of a power prediction model and corresponds to the current power grid stability;
if the current power grid state is determined to be the power grid frequency too high state, storing electric energy corresponding to the exceeding value of the current wind turbine by using the super capacitor so as to reduce the power generation power of the wind turbine to the standard power generation power; and the exceeding value is an exceeding value of the generating power of the current wind turbine generator set exceeding the standard generating power.
9. An electronic device, comprising: a processor and a memory storing machine-readable instructions executable by the processor, which when executed by the processor, implement the wind turbine energy storage control method of any of claims 1-5.
10. A computer readable storage medium having stored thereon instructions for causing a machine to perform the wind turbine energy storage control method of any of claims 1-5.
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