Control methods and devices for energy storage devices and wind turbine generator sets

Abstract

A control method, apparatus, and wind turbine generator set for an energy storage device are provided. The energy storage device is connected to the DC bus of the converter of the wind turbine generator set. The control method includes: determining whether the wind turbine generator set is in a power generation state; and controlling the output power of the energy storage device in response to the wind turbine generator set being in a power generation state, so that the actual power curve of the wind turbine generator set tracks the target power curve.

Description

Technical Field

[0001] This disclosure generally relates to the field of power technology, and more specifically, to a control method, apparatus, and wind turbine generator set for an energy storage device. Background Technology

[0002] With the increasing penetration rate of new energy power generation units, the safety and stability of wind turbines in high-penetration power grids have attracted widespread attention. In actual power grid operation, when power consumption and supply are mismatched, small components with short-term fluctuations in the grid frequency can occur. These frequency disturbances are mainly compensated for by the wind turbine's own regulation system to achieve grid load compensation and correct frequency fluctuations; this process is known as primary frequency regulation by the wind turbine. Wind turbines can also meet grid dispatch requirements by controlling energy storage devices to perform primary frequency regulation.

[0003] Because the performance of wind turbine generators is affected by ambient temperature and wind resources, the power curve testing cycle of the generators is long and the success rate is low, and the manpower and costs invested during the process are considerable. Summary of the Invention

[0004] Exemplary embodiments of this disclosure provide a control method, apparatus, and wind turbine generator set for an energy storage device, which can optimize the actual power curve of the wind turbine generator set.

[0005] According to a first aspect of the present disclosure, a control method for an energy storage device is provided, the energy storage device being connected to the DC bus of a converter of a wind turbine generator set, wherein the control method includes: determining whether the wind turbine generator set is in a power generation state; and, in response to the wind turbine generator set being in a power generation state, controlling the output power of the energy storage device to make the actual power curve of the wind turbine generator set track a target power curve.

[0006] According to a second aspect of the present disclosure, a control device for an energy storage device is provided, the energy storage device being connected to the DC bus of a converter of a wind turbine generator set, wherein the control device includes: a power generation state determination unit configured to determine whether the wind turbine generator set is in a power generation state; and a power control unit configured to control the output power of the energy storage device in response to the wind turbine generator set being in a power generation state, so as to make the actual power curve of the wind turbine generator set track a target power curve.

[0007] According to a third aspect of the present disclosure, a computer-readable storage medium storing a computer program is provided, which, when executed by a processor, causes the processor to perform the control method for an energy storage device as described above.

[0008] According to a fourth aspect of the present disclosure, a controller is provided, the controller comprising: a processor; and a memory storing a computer program, which, when executed by the processor, causes the processor to perform the control method for an energy storage device as described above.

[0009] According to a fifth aspect of the present disclosure, a wind turbine generator set is provided, including the controller described above.

[0010] The control method, apparatus, and wind turbine generator of the energy storage device according to the exemplary embodiments of the present disclosure can optimize the actual power curve of the wind turbine generator, thereby improving the power generation performance of the generator and shortening the test cycle of the generator power curve and increasing the test success rate of the generator power curve.

[0011] Further aspects and / or advantages of the general concept of this disclosure will be set forth in part in the description which follows, and in part will be clear from the description or may be learned by practice of the general concept of this disclosure. Attached Figure Description

[0012] The above and other objects and features of exemplary embodiments of this disclosure will become clearer from the following description taken in conjunction with the accompanying drawings, which exemplarily illustrate the embodiments, wherein:

[0013] Figure 1 A flowchart illustrating a control method for an energy storage device according to an exemplary embodiment of the present disclosure;

[0014] Figure 2 A flowchart illustrating a method for controlling the output power of an energy storage device according to an exemplary embodiment of the present disclosure;

[0015] Figure 3 A flowchart illustrating a method for controlling the output power of an energy storage device according to another exemplary embodiment of the present disclosure;

[0016] Figure 4 An example of a control method for an energy storage device according to an exemplary embodiment of the present disclosure is shown;

[0017] Figure 5 An example showing the actual power curve of a wind turbine generator set according to an exemplary embodiment of the present disclosure;

[0018] Figure 6 A structural block diagram of a control device for an energy storage device according to an exemplary embodiment of the present disclosure is shown. Detailed Implementation

[0019] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, examples of which are illustrated in the drawings, wherein the same reference numerals always refer to the same parts. The embodiments will now be described with reference to the accompanying drawings in order to explain this disclosure.

[0020] Figure 1 A flowchart illustrating a control method for an energy storage device according to an exemplary embodiment of the present disclosure is shown. As an example, the control method may be executed by the main controller of a wind turbine generator (i.e., the wind turbine main controller) or the controller of the generator converter. As an example, the control method for the energy storage device may be executed periodically according to a preset period T, or it may be executed in real time.

[0021] The energy storage device is connected to the DC bus of the converter of the wind turbine generator set. For example, this DC bus is the DC bus between the turbine-side converter and the grid-side converter.

[0022] As an example, the energy storage device is located on the DC bus side of the unit. The control method is executed by the wind turbine main controller. The control signal output by the wind turbine main controller for controlling the energy storage device can be sent to the converter controller, and the converter controller controls the energy storage device based on the control signal.

[0023] As an example, the energy storage device includes, but is not limited to, battery energy storage and flywheel energy storage. It should be understood that the energy storage device may also be other suitable types of energy storage devices, and this disclosure does not limit it.

[0024] Reference Figure 1 In step S10, it is determined whether the wind turbine generator is in power generation mode.

[0025] In step S20, in response to the wind turbine being in a power generation state, the output power of the energy storage device is controlled so that the actual power curve of the wind turbine tracks the target power curve.

[0026] As an example, the target power curve can be the guaranteed power curve, theoretical power curve, or standard power curve of a wind turbine generator set. For instance, the guaranteed power curve of a wind turbine generator set can be understood as the power curve that the manufacturer promises the wind turbine generator set can achieve.

[0027] It should be understood that the target power curves differ under different air densities.

[0028] As an example, the output power of the energy storage device is controlled based on at least one of the following: the current sector of the wind turbine, whether the wind turbine is in a power curve test state, whether the wind turbine is in a specific power generation state, the remaining power of the energy storage device, and the current operating environment parameters of the wind turbine.

[0029] As an example, the specific power generation states include: full power generation and power curtailment.

[0030] Below, we will combine Figure 2 and Figure 3 An exemplary embodiment of step S20 will be described below.

[0031] Figure 2 A flowchart illustrating a method for controlling the output power of an energy storage device according to an exemplary embodiment of the present disclosure is provided.

[0032] Reference Figure 2 In step S101, in response to the wind turbine being in a power curve test state and the current sector being within the test sector range, it is determined whether the wind turbine is in a specific power generation state.

[0033] In step S102, in response to the wind turbine not being in the specific power generation state, the energy storage device is controlled to output power according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

[0034] As an example, in response to the wind turbine not being in the specific power generation state, if the remaining power of the energy storage device is lower than the preset mandatory power supply level, the energy storage device is controlled to be in standby mode; if the remaining power of the energy storage device is not lower than the preset mandatory power supply level, the energy storage device is controlled to output power according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

[0035] Standby mode can be understood as a state of waiting to discharge or charge, where power is neither discharged to output power nor charged to absorb power from the outside.

[0036] As an example, step S102 includes: first, determining the target power curve corresponding to the current ambient air density of the wind turbine generator set; then, determining whether the current actual output power of the wind turbine generator set is less than the target power corresponding to the current ambient wind speed in the determined target power curve. When the current actual output power of the wind turbine generator set is less than the target power, the output power of the energy storage device is controlled to be ΔP, where ΔP is the difference between the current actual output power and the target power. When ΔP is less than 0, it indicates that the energy storage device is discharging. When the current actual output power of the wind turbine generator set is not less than the target power, the energy storage device is controlled to be in standby mode.

[0037] As an example, the actual output power of a wind turbine is the output power of the wind turbine as measured by an electricity meter.

[0038] In step S103, in response to the wind turbine being in a specific power generation state, the energy storage device is controlled to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

[0039] As an example, in response to a wind turbine being in a specific power generation state, if the remaining power of the energy storage device is not lower than the rated capacity level, the energy storage device is controlled to be in standby mode; if the remaining power of the energy storage device is lower than the rated capacity level, the energy storage device is controlled to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

[0040] As an example, step S103 includes: first, determining the target power curve corresponding to the current ambient air density of the wind turbine generator set; then, determining whether the current actual output power of the wind turbine generator set is greater than the target power corresponding to the current ambient wind speed in the determined target power curve. When the current actual output power of the wind turbine generator set is greater than the target power, the output power of the energy storage device is controlled to be ΔP, where ΔP is the difference between the current actual output power and the target power. When ΔP is greater than 0, it indicates that the energy storage device is charging. When the current actual output power of the wind turbine generator set is not greater than the target power, the energy storage device is controlled to be in standby mode.

[0041] Target power refers to the output power value at the current actual ambient wind speed, as shown on the target power curve corresponding to the current ambient air density of the wind turbine. In other words, target power can also be understood as the guaranteed power under the current operating environmental parameters of the wind turbine.

[0042] Figure 3 A flowchart illustrating a method for controlling the output power of an energy storage device according to another exemplary embodiment of the present disclosure is shown.

[0043] Reference Figure 3 In step S201, when the wind turbine generator is not in a power curve testing state or the current sector is not within the test sector range, it is determined whether the remaining power of the energy storage device is lower than the rated energy storage capacity level. It should be understood that the aforementioned test sector range refers to the power curve test sector range.

[0044] When it is determined in step S201 that the remaining power of the energy storage device is not lower than the rated capacity level of the energy storage device, step S202 is executed to control the energy storage device to be in standby mode.

[0045] As an example, the rated capacity level of energy storage is determined based on the theoretical rated capacity of the energy storage device and a certain dead zone range.

[0046] When it is determined in step S201 that the remaining power of the energy storage device is lower than the rated energy storage capacity, step S203 is executed to determine whether the remaining power of the energy storage device is lower than the preset forced power supply level.

[0047] When it is determined in step S203 that the remaining power of the energy storage device is lower than the preset forced power protection level, step S204 is executed to control the energy storage device to enter the periodic charging mode.

[0048] When it is determined in step S203 that the remaining power of the energy storage device is not lower than the preset mandatory power supply level, step S205 is executed to determine whether the wind turbine generator is in a specific power generation state.

[0049] When it is determined in step S205 that the wind turbine generator is not in a specific power generation state, step S206 is executed to control the energy storage device to be in standby state.

[0050] When it is determined in step S205 that the wind turbine is in a specific power generation state, step S207 is executed, and the energy storage device is controlled to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

[0051] As an example, step S207 includes: first, determining the target power curve corresponding to the current ambient air density of the wind turbine generator set; then, determining whether the current actual output power of the wind turbine generator set is greater than the target power corresponding to the current ambient wind speed in the determined target power curve. When the current actual output power of the wind turbine generator set is greater than the target power, the output power of the energy storage device is controlled to be ΔP, where ΔP is the difference between the current actual output power and the target power. When ΔP is greater than 0, it indicates that the energy storage device is charging. When the current actual output power of the wind turbine generator set is not greater than the target power, the energy storage device is controlled to be in standby mode.

[0052] Figure 4 An example of a control method for an energy storage device according to an exemplary embodiment of the present disclosure is shown.

[0053] Reference Figure 4 In step S301, it is determined whether the unit is in the power generation state; if the unit is not in the power generation state, the energy storage device is not working and the enable bit is FLASE; if the unit is in the power generation state, the energy storage device is started and the enable bit is TRUE, and then the process proceeds to step S302.

[0054] As an example, it can be determined whether the unit is generating electricity based on the unit's operating data.

[0055] In step S302, it is determined whether the unit power curve test flag is TRUE and whether the current sector of the unit is in the power curve test sector; if both are TRUE, proceed to step S303; otherwise, proceed to step S307.

[0056] In step S303, it is determined whether the full-load flag bit of the generator unit is TRUE and whether the power limit flag bit is TRUE; if neither is TRUE, proceed to step S304, otherwise proceed to step S306.

[0057] In step S304, it is determined whether the remaining power of the energy storage device is less than the set forced power supply level; if it is not less than, then proceed to step S305; otherwise, when the remaining power of the energy storage device is less than the set forced power supply level, the energy storage device is controlled to be in a standby charging state and does not output power to the outside.

[0058] In step S305, the corresponding guaranteed power curve is selected based on the current air density of the unit environment, and it is determined whether the actual power under the current wind speed of the unit environment is less than the corresponding guaranteed power (i.e., the power under the current wind speed of the unit environment in the corresponding guaranteed power curve). If it is less, the energy storage device is controlled to output power, and the output power ΔP = power of the electricity meter (i.e., the actual measured unit power) - guaranteed power of the unit, where ΔP is negative to indicate that the energy storage device discharges and outputs power, and positive to indicate that the energy storage device absorbs power from the outside while charging. If it is not less, the energy storage device is controlled to be in a standby state, but no power is output.

[0059] In step S306, it is determined whether the remaining power of the energy storage device is within the rated capacity range of energy storage considering the dead zone; if so, the energy storage device is controlled to be in a standby state, but no power is output to the outside; if not, the energy storage device is controlled to enter the charging state, and the output power of the energy storage device ΔP = power of the electricity meter - guaranteed power of the unit.

[0060] In step S307, it is determined whether the remaining power of the energy storage device is within the rated capacity range of energy storage considering the dead zone; if yes, the energy storage device is controlled to be in a standby state, but no power is output to the outside; if no, proceed to step S308.

[0061] In step S308, it is determined whether the remaining power of the energy storage device is less than the forced power protection level. If so, the energy storage device is controlled to enter the periodic charging mode, that is, to slowly charge at night according to the set power value; if not, the process proceeds to step S309.

[0062] In step S309, it is determined whether the full-power flag of the unit is TRUE and whether the power limit flag is TRUE. If neither is TRUE, the energy storage device is controlled to be in a standby state, but no power is output. Otherwise, the energy storage device is controlled to enter the charging state, and the output power of the energy storage device ΔP = power meter power - guaranteed power of the unit.

[0063] Figure 5 An example of an actual power curve of a wind turbine generator set according to an exemplary embodiment of the present disclosure is shown.

[0064] like Figure 5 As shown, compared to controlling the energy storage device without using the control method according to the exemplary embodiments of the present disclosure, the actual power curve of the wind turbine generator is closer to the guaranteed power curve after controlling the energy storage device using the control method according to the exemplary embodiments of the present disclosure.

[0065] According to exemplary embodiments of this disclosure, power scheduling plans for wind / storage integrated wind turbine generator sets can be optimized, dynamically compensating for power plan deviations during generator generation to ensure successful power plan implementation. According to exemplary embodiments of this disclosure, controlling the energy storage device ensures the generator power curve meets targets, involving a complete energy storage device control strategy throughout the entire generator generation process from start-up to power generation, while also considering control methods within different sectors of the generator set. According to exemplary embodiments of this disclosure, the energy storage device optimizes the power curve throughout the entire generator operation phase (start-up to power generation), increasing power generation and facilitating power curve testing. Furthermore, sector factors are considered when optimizing the power curve.

[0066] Figure 6 A structural block diagram of a control device for an energy storage device according to an exemplary embodiment of the present disclosure is shown, wherein the energy storage device is connected to the DC bus of the converter of a wind turbine generator set.

[0067] Reference Figure 6 The control device for an energy storage device according to an exemplary embodiment of the present disclosure includes: a power generation state determination unit 10 and a power control unit 20.

[0068] Specifically, the power generation status determination unit 10 is configured to determine whether the wind turbine generator is in a power generation state.

[0069] The power control unit 20 is configured to control the output power of the energy storage device in response to the wind turbine being in a power generation state, so that the actual power curve of the wind turbine tracks the target power curve.

[0070] As an example, the power control unit 20 is configured to control the output power of the energy storage device according to the sector where the wind turbine is currently located.

[0071] As an example, the power control unit 20 is configured to: determine whether the wind turbine is in a specific power generation state in response to the wind turbine being in a power curve test state and the current sector being within the test sector range; control the energy storage device to output power externally according to the target power curve corresponding to the current operating environment parameters of the wind turbine, in response to the wind turbine being in the specific power generation state; and control the energy storage device to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

[0072] As an example, the power control unit 20 is configured to: determine a target power curve corresponding to the current ambient air density of the wind turbine generator set in a power curve test state and the current sector is within the test sector range, and the wind turbine generator set is not in the aforementioned specific power generation state; determine whether the current actual output power of the wind turbine generator set is less than the target power corresponding to the current ambient wind speed of the wind turbine generator set in the determined target power curve; control the output power of the energy storage device to ΔP in response to the current actual output power of the wind turbine generator set being less than the target power, where ΔP is the difference between the current actual output power and the target power, and when ΔP is less than 0, it indicates that the energy storage device is discharging; and control the energy storage device to be in a standby state in response to the current actual output power of the wind turbine generator set not being less than the determined target power.

[0073] As an example, the power control unit 20 is configured to: respond to the wind turbine being in a power curve test state and the current sector being within the test sector range, and the wind turbine not being in the aforementioned specific power generation state, if the remaining power of the energy storage device is lower than a preset mandatory power supply level, then control the energy storage device to be in a standby state; if the remaining power of the energy storage device is not lower than the preset mandatory power supply level, then control the energy storage device to output power externally according to the target power curve corresponding to the current operating environment parameters of the wind turbine; the power control unit is configured to: respond to the wind turbine being in a power curve test state and the current sector being within the test sector range, and the wind turbine being in a specific power generation state, if the remaining power of the energy storage device is not lower than the rated energy storage capacity level, then control the energy storage device to be in a standby state; if the remaining power of the energy storage device is lower than the rated energy storage capacity level, then control the energy storage device to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

[0074] As an example, the power control unit 20 is configured to: determine whether the remaining power of the energy storage device is lower than the rated energy storage capacity level in response to the wind turbine generator not being in a power curve test state or the current sector not being in the test sector range; control the energy storage device to be in standby state in response to the remaining power of the energy storage device not being lower than the rated energy storage capacity level; control the energy storage device to enter a periodic charging mode in response to the remaining power of the energy storage device being lower than the rated energy storage capacity level and the remaining power of the energy storage device being lower than a preset forced power supply level; control the energy storage device to be in standby state in response to the remaining power of the energy storage device being lower than the rated energy storage capacity level, the remaining power of the energy storage device not being lower than the preset forced power supply level, and the wind turbine generator not being in a specific power generation state; and control the energy storage device to absorb power from the outside for charging in response to the remaining power of the energy storage device being lower than the rated energy storage capacity level, the remaining power of the energy storage device not being lower than the preset forced power supply level, and the wind turbine generator being in a specific power generation state.

[0075] As an example, the power control unit 20 can be configured to: determine a target power curve corresponding to the current ambient air density of the wind turbine generator in response to the wind turbine generator being in a power curve test state and the current sector being within the test sector range, and the wind turbine generator being in a specific power generation state; determine whether the current actual output power of the wind turbine generator is greater than the target power corresponding to the current ambient wind speed of the wind turbine generator in the determined target power curve; control the output power of the energy storage device to ΔP in response to the current actual output power of the wind turbine generator being greater than the target power, where ΔP is the difference between the current actual output power and the target power, and when ΔP is greater than 0, it indicates that the energy storage device is charging; and control the energy storage device to be in a standby state in response to the current actual output power of the wind turbine generator not being greater than the target power.

[0076] As an example, the power control unit 20 is configured to: determine a target power curve corresponding to the current ambient air density of the wind turbine generator in response to the wind turbine generator not being in a power curve test state or the current sector not being within the test sector range, the remaining power of the energy storage device being lower than the rated energy storage capacity level, the remaining power of the energy storage device not being lower than the preset forced power supply level, and the wind turbine generator being in a specific power generation state; determine whether the current actual output power of the wind turbine generator is greater than the target power corresponding to the current ambient wind speed of the wind turbine generator in the determined target power curve; control the output power of the energy storage device to ΔP in response to the current actual output power of the wind turbine generator being greater than the target power, where ΔP is the difference between the current actual output power and the target power, and when ΔP is greater than 0, it indicates that the energy storage device is charging; and control the energy storage device to be in a standby state in response to the current actual output power of the wind turbine generator not being greater than the target power.

[0077] As an example, the specific power generation states mentioned above include: full power generation and power curtailment.

[0078] It should be understood that the specific processing performed by the control device of the energy storage device according to the exemplary embodiments of this disclosure has been referred to Figures 1 to 5 A detailed description has been provided, and the relevant details will not be repeated here.

[0079] It should be understood that the various units in the control device of the energy storage device according to the exemplary embodiments of this disclosure may be implemented as hardware components and / or software components. Those skilled in the art can implement the various units, for example, using field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs), based on the processes performed by the defined various units.

[0080] Exemplary embodiments of this disclosure provide a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform a control method for an energy storage device as described in the exemplary embodiments above. The computer-readable storage medium is any data storage device capable of storing data read from a computer system. Examples of computer-readable storage media include: read-only memory, random access memory, read-only optical disk, magnetic tape, floppy disk, optical data storage device, and carrier waves (such as data transmission via the Internet through wired or wireless transmission paths).

[0081] The controller according to an exemplary embodiment of the present disclosure includes a processor (not shown) and a memory (not shown), wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform a control method for an energy storage device as described in the exemplary embodiment above. As an example, the controller may be a main controller for a wind turbine generator or a controller for a converter.

[0082] Additionally, this disclosure also protects a wind turbine generator set, which includes a controller as described in the exemplary embodiments above. The specific control logic executed by this controller can be found in conjunction with... Figures 1-3 and its textual description, and reference Figures 4-6 The details and their textual descriptions will not be repeated here.

[0083] While some exemplary embodiments of this disclosure have been shown and described, those skilled in the art will understand that modifications may be made to these embodiments without departing from the principles and spirit of this disclosure, which are defined by the claims and their equivalents.

Claims

1. A control method for an energy storage device, characterized in that, The energy storage device is connected to the DC bus of the converter of the wind turbine generator set, wherein the control method includes: Determine whether the wind turbine generator is in a power generation state; In response to the wind turbine being in power generation mode, the output power of the energy storage device is controlled according to the sector where the wind turbine is currently located, so that the actual power curve of the wind turbine tracks the target power curve.

2. The control method according to claim 1, characterized in that, The steps for controlling the output power of the energy storage device based on the current sector of the wind turbine generator include: In response to the wind turbine being in a power curve test state and the current sector being within the test sector range, determine whether the wind turbine is in a specific power generation state. In response to the wind turbine not being in the specific power generation state, the energy storage device is controlled to output power according to the target power curve corresponding to the current operating environment parameters of the wind turbine. In response to the wind turbine being in the specific power generation state, the energy storage device is controlled to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

3. The control method according to claim 2, characterized in that, The steps for controlling the energy storage device to output power based on the target power curve corresponding to the current operating environment parameters of the wind turbine generator set include: Determine the target power curve corresponding to the current ambient air density of the wind turbine generator set; Determine whether the current actual output power of the wind turbine generator is less than the target power corresponding to the current ambient wind speed of the wind turbine generator in the determined target power curve; In response to the wind turbine generator's current actual output power being less than the target power, the output power of the energy storage device is controlled to be ΔP, where ΔP is the difference between the current actual output power and the target power, and when ΔP is less than 0, it indicates that the energy storage device is discharging. In response to the wind turbine generator's current actual output power being no less than a predetermined target power, the energy storage device is controlled to enter a standby state.

4. The control method according to claim 2, characterized in that, In response to the wind turbine not being in the specific power generation state, the step of controlling the energy storage device to output power according to the target power curve corresponding to the current operating environment parameters of the wind turbine includes: In response to the wind turbine not being in the specific power generation state, if the remaining power of the energy storage device is lower than the preset mandatory power supply level, the energy storage device is controlled to be in standby mode; if the remaining power of the energy storage device is not lower than the preset mandatory power supply level, the energy storage device is controlled to output power according to the target power curve corresponding to the current operating environment parameters of the wind turbine. The step of controlling the energy storage device to absorb power from the outside for charging, in response to the wind turbine being in the specific power generation state, according to the target power curve corresponding to the current operating environment parameters of the wind turbine, includes: In response to the wind turbine being in the specific power generation state, if the remaining power of the energy storage device is not lower than the rated energy storage capacity level, the energy storage device is controlled to be in standby mode; if the remaining power of the energy storage device is lower than the rated energy storage capacity level, the energy storage device is controlled to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine.

5. The control method according to claim 1, characterized in that, The steps for controlling the output power of the energy storage device based on the current sector of the wind turbine generator include: In response to the wind turbine generator not being in a power curve test state or the current sector not being within the test sector range, determine whether the remaining power of the energy storage device is lower than the rated energy storage capacity level. In response to the fact that the remaining power of the energy storage device is not lower than the rated capacity level of the energy storage device, the energy storage device is controlled to be in standby mode; In response to the energy storage device's remaining power being lower than the rated energy storage capacity and the energy storage device's remaining power being lower than a preset forced power supply level, the energy storage device is controlled to enter a periodic charging mode. In response to the energy storage device having a remaining power level lower than the rated capacity level, a remaining power level not lower than the preset mandatory power supply level, and the wind turbine generator not being in a specific power generation state, the energy storage device is controlled to be in standby mode. In response to the following situations: the remaining power of the energy storage device is lower than the rated capacity level, the remaining power of the energy storage device is not lower than the preset mandatory power supply level, and the wind turbine generator is in a specific power generation state, the energy storage device is controlled to absorb power from the outside for charging according to the target power curve corresponding to the current operating environment parameters of the wind turbine generator.

6. The control method according to claim 2 or 5, characterized in that, The step of controlling the energy storage device to absorb power from the outside for charging, based on the target power curve corresponding to the current operating environment parameters of the wind turbine generator set, includes: Determine the target power curve corresponding to the current ambient air density of the wind turbine generator set; Determine whether the current actual output power of the wind turbine generator set is greater than the target power corresponding to the current ambient wind speed of the wind turbine generator set in the determined target power curve; In response to the wind turbine generator's current actual output power being greater than the target power, the output power of the energy storage device is controlled to be ΔP, where ΔP is the difference between the current actual output power and the target power, and when ΔP is greater than 0, it indicates that the energy storage device is charging. In response to the fact that the actual output power of the wind turbine generator is not greater than the target power, the energy storage device is controlled to be in standby mode.

7. The control method according to claim 2 or 5, characterized in that, The specific power generation states include: full power generation and power curtailment.

8. A control device for an energy storage device, characterized in that, The energy storage device is connected to the DC bus of the converter of the wind turbine generator set, wherein the control device includes: A power generation status determination unit is configured to determine whether the wind turbine generator set is in a power generation state. A power control unit is configured to control the output power of the energy storage device in response to the wind turbine being in a power generation state, based on the sector where the wind turbine is currently located, so that the actual power curve of the wind turbine tracks the target power curve.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it causes the processor to perform the control method of the energy storage device as described in any one of claims 1 to 7.

10. A controller, characterized in that, The controller includes: processor; A memory storing a computer program that, when executed by a processor, causes the processor to perform a control method for an energy storage device as described in any one of claims 1 to 7.

11. A wind turbine generator set, characterized in that, The wind turbine generator set includes the controller as described in claim 10.

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