Active power control method, device and system of wind power plant, medium and product

Abstract

The invention discloses an active power control method, device and system for a wind power plant, a medium and a product, and relates to the technical field of wind power generation. According to the embodiment of the invention, the actual output power of each wind turbine generator in the previous period is combined with the field-level active power target value of the wind power plant in the current period, and the corresponding power set value is allocated to each wind turbine generator, so that the closed-loop control of the active power is realized; and meanwhile, according to the actual rate and the field-level active rate target value of each wind turbine generator in the previous period and the field-level active rate target value and the active power set value in the current period, corresponding rate set values are allocated to each wind turbine generator, so that closed-loop control of the active rate is realized. Namely, according to the embodiment of the invention, the active power and the active rate of the wind turbine generator are respectively controlled through two closed-loop control, and the rate control of the wind power plant is ensured to meet the requirement on the premise that the power control meets the requirement.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a method, device, system, medium and product for active power control of a wind farm. Background Technology

[0002] With the continuous increase in installed wind power capacity, the proportion of wind power generation in the power grid is also constantly increasing. However, due to the randomness, intermittency, and poor controllability of wind power generation, it poses certain challenges to the safety of the power grid. Therefore, the power grid has put forward more stringent requirements for wind power grid connection. For example, some power grids have now added requirements for the active power setpoint rate of wind farms to the active power setpoint response requirements, in order to measure and evaluate the overall active power regulation effect of wind farms.

[0003] As the active power control system of a wind farm, the energy management system can receive control commands from the Automatic Generation Control (AGC) substation system at the wind farm end, then perform intelligent calculations to generate allocation commands and send them to the wind turbines. However, most current energy management systems only support regulation methods targeting active power and cannot support active power rate regulation commands, thus failing to guarantee the overall active power regulation effect of the wind farm. Summary of the Invention

[0004] This application provides a method, device, system, medium, and product for active power control of wind farms, which can solve the problem that current energy management systems cannot adjust the active power rate of wind farms.

[0005] In a first aspect, embodiments of this application provide a method for active power control in a wind farm, comprising:

[0006] The target values ​​of active power and active rate of the wind farm in the first cycle are obtained, the first active power of each wind turbine in the second cycle, and the feedback of active power and active rate of the wind farm in the second cycle. The second cycle is the cycle preceding the first cycle.

[0007] Based on the difference between the target value of active power at the field level and the feedback value of active power at the field level, as well as the first active power of each wind turbine in the second cycle, the active power set value of each wind turbine in the first cycle is determined.

[0008] Based on the active power setpoint of each wind turbine in the first cycle, the first active power of each wind turbine in the second cycle, the field-level active rate target value, and the field-level active rate feedback, the active rate setpoint of each wind turbine in the first cycle is determined.

[0009] Based on the active power setpoint and active rate setpoint of each wind turbine, active power control is performed on each wind turbine in the first cycle.

[0010] Secondly, embodiments of this application provide an active power control device for a wind farm, comprising:

[0011] The acquisition module is used to acquire the target value of active power and the target value of active power rate of the wind farm in the first cycle, the first active power of each wind turbine in the second cycle, and the feedback amount of active power and the feedback amount of active power rate of the wind farm in the second cycle. The second cycle is the cycle preceding the first cycle.

[0012] The first determining module is used to determine the active power set value of each wind turbine in the first cycle based on the difference between the target value of the active power at the field level and the feedback amount of the active power at the field level, as well as the first active power of each wind turbine in the second cycle.

[0013] The second determining module is used to determine the active power setting value of each wind turbine in the first cycle based on the active power setting value of each wind turbine in the first cycle, the first active power of each wind turbine in the second cycle, the field-level active power rate target value, and the field-level active power rate feedback.

[0014] The control module is used to perform active power control on each wind turbine in the first cycle based on the active power set value and active power rate set value of each wind turbine.

[0015] Thirdly, embodiments of this application provide an active power control system for a wind farm, including: an automatic generation control (AGC) substation, an energy management system, and N wind turbine units, where N is an integer greater than 1;

[0016] The AGC substation is used to receive control commands from the AGC master station and send the target values ​​of the wind farm's active power and active rate in the first cycle to the energy management system.

[0017] The energy management system is used to acquire the first active power of each wind turbine in the second cycle, the field-level active power feedback and the field-level active power rate feedback of the wind farm in the second cycle, and determine the active power setpoint of each wind turbine in the first cycle based on the difference between the field-level active power target value and the field-level active power feedback, as well as the first active power of each wind turbine in the second cycle; determine the active power rate setpoint of each wind turbine in the first cycle based on the active power setpoint, the first active power of each wind turbine in the second cycle, the field-level active power rate target value, and the field-level active power rate feedback; and perform active power control on each wind turbine in the first cycle based on the active power setpoint and the active power rate setpoint.

[0018] The second cycle is the cycle preceding the first cycle.

[0019] Fourthly, embodiments of this application provide a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the method described in the first aspect.

[0020] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect.

[0021] This embodiment of the application assigns corresponding power setpoints to each wind turbine based on the actual output power of each wind turbine in the previous cycle and the target value of the wind farm's active power in the current cycle, thus achieving closed-loop control of active power. Simultaneously, based on the actual speed of each wind turbine in the previous cycle, the target value of the wind farm's active power rate, and the target value of the wind farm's active power rate and active power setpoints in the current cycle, it assigns corresponding speed setpoints to each wind turbine, thus achieving closed-loop control of active power rate. In other words, this embodiment of the application controls the active power and active power rate of the wind turbines through two closed-loop controls, ensuring that both power control and wind farm speed control meet requirements. Attached Figure Description

[0022] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0023] Figure 1 A flowchart illustrating an active power control method for a wind farm, provided as an embodiment of this application;

[0024] Figure 2 A flowchart illustrating an active power control method for a wind farm, provided as an embodiment of this application;

[0025] Figure 3 A logic diagram for determining an active power setpoint is provided in an embodiment of this application;

[0026] Figure 4 A flowchart of another active power control method for a wind farm provided in an embodiment of this application;

[0027] Figure 5 A flowchart of another active power control method for a wind farm provided in an embodiment of this application;

[0028] Figure 6 A logic diagram for determining an active power rate setpoint is provided in an embodiment of this application;

[0029] Figure 7A logic diagram of active power control for a wind turbine provided in an embodiment of this application;

[0030] Figure 8 A schematic diagram of the active power adjustment curve of a wind turbine generator provided for an embodiment of this application;

[0031] Figure 9 A schematic diagram of the active power adjustment curve of another wind turbine provided in an embodiment of this application;

[0032] Figure 10 A structural diagram of a wind farm active power control device provided in an embodiment of this application;

[0033] Figure 11 A structural diagram of an active power control system for a wind farm provided in an embodiment of this application;

[0034] Figure 12 This is an architecture diagram of an energy management system provided in an embodiment of this application. Detailed Implementation

[0035] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0036] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the cable-stayed tower and wind turbine generator set of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] With the continuous increase in wind power installed capacity, the power grid has put forward more stringent requirements for wind power grid connection. For example, some power grids have added requirements for the active power setpoint rate of wind farms on the basis of the active power setpoint response requirements of wind farms, so as to measure and evaluate the overall active power regulation effect of wind farms.

[0038] However, most energy management systems currently only support regulation based on active power, which can easily lead to problems such as excessively fast power regulation and regulation lag, making it difficult to meet the needs of the power grid.

[0039] Therefore, embodiments of this application provide a method, device, system, medium, and product for active power control of wind farms, which can solve the problem that current energy management systems cannot adjust the active power rate of wind farms.

[0040] This embodiment of the application assigns corresponding power setpoints to each wind turbine based on the actual output power of each wind turbine in the previous cycle and the target value of the wind farm's active power in the current cycle, thus achieving closed-loop control of active power. Simultaneously, based on the actual speed of each wind turbine in the previous cycle, the target value of the wind farm's active power rate, and the target value of the wind farm's active power rate and active power setpoints in the current cycle, it assigns corresponding speed setpoints to each wind turbine, thus achieving closed-loop control of active power rate. In other words, this embodiment of the application controls the active power and active power rate of the wind turbines through two closed-loop controls, ensuring that both power control and wind farm speed control meet requirements.

[0041] The active power control method, device, system, medium and product for wind farms provided in this application will be described in detail below with reference to specific embodiments.

[0042] Figure 1 The flowchart illustrates an active power control method for a wind farm, as provided in this application embodiment. This active power control method can be applied to the energy management system of a wind farm, such as... Figure 1 As shown, the active power control method for this wind farm may include the following steps:

[0043] S110. Obtain the target value of active power and active rate of the wind farm in the first cycle, the first active power of each wind turbine in the second cycle, and the feedback amount of active power and active rate of the wind farm in the second cycle.

[0044] The second cycle is the cycle preceding the first cycle.

[0045] S120. Based on the difference between the target value of active power at the field level and the feedback value of active power at the field level, and the first active power of each wind turbine in the second cycle, determine the active power set value of each wind turbine in the first cycle.

[0046] S130. Based on the active power setpoint of each wind turbine in the first cycle, the first active power of each wind turbine in the second cycle, the field-level active rate target value, and the field-level active rate feedback, determine the active rate setpoint of each wind turbine in the first cycle.

[0047] S140. Based on the active power set value and active rate set value of each wind turbine, perform active power control on each wind turbine in the first cycle.

[0048] The above steps are explained in detail below:

[0049] In S110, the first cycle can be the current cycle, and the size of each cycle can be set according to actual needs. For example, it can be configured to 5s. That is, the embodiments of this application can perform active power control on the wind farm according to a fixed cycle.

[0050] Field-level active power target value P set This can be the setpoint for the active power at the wind farm level, in kW. The target value for the active power at the wind farm level is P. set The AGC substation within the wind farm can issue control commands from the AGC master station at the power grid dispatch center to the energy management system, which then determines the target active power value P at the farm level. set The active power of wind turbines is controlled to meet the power regulation requirements of the power grid for wind farms.

[0051] Field-level active power rate target value R set This can be a setpoint for the active power rate at the wind farm level, expressed in kW / s or MW / min. The target active power rate at the wind farm level is R. set The AGC substation within the wind farm can issue control commands to the energy management system based on the AGC master station at the power grid dispatch center, or it can be configured by the user according to the scenario and requirements. The target value of the wind farm-level active rate is R. set Whether the command is issued by the AGC substation or configured by the user depends on the requirements of the power grid.

[0052] For example, when the power grid requires a target value R for the field-level active power rate. set When the power is transmitted from the AGC substation, the power value transmitted by the AGC substation can be used as the field-level active power rate target value R. set If the power grid does not require it, the power value configured by the user can be used as the target value R for the field-level active power rate by default. set Based on the field-level active power rate target value R set The active power rate of wind turbines can be controlled to meet the grid's rate regulation requirements for wind farms.

[0053] In this embodiment of the application, the energy management system can receive the target value P of the wind farm's active power at the field level in the current cycle from the AGC substation. set and field-level active power rate target value R set This provides a foundation for subsequent active power control.

[0054] The second cycle can be the cycle preceding the first cycle. For example, if the first cycle is the third cycle, the second cycle can be the second cycle.

[0055] First active power Pr i This represents the actual active power of each wind turbine in the wind farm during the second cycle. Different wind turbines can correspond to different first active power Pr. i For example, the active power collected by each wind turbine at the end of the second cycle can be taken as the actual active power of each wind turbine during the second cycle.

[0056] The field-level active power feedback P of the wind farm in the second cycle r It can be the sum of the active power feedback of all wind turbines in the wind farm during the second cycle, that is, the field-level active power feedback P of the wind farm during the second cycle. r It can be equal to the first active power Pr of all wind turbines in the second cycle. i The sum of .

[0057] The field-level active power rate feedback R of the wind farm in the second cycle r It can be the sum of the active power rate feedback of all wind turbines in the wind farm during the second cycle, that is, the field-level active power rate feedback R of the wind farm during the second cycle. r It can be equal to the first active rate Rr of all wind turbines in the second cycle. i The summation. First active rate Rr i It can be the actual active power rate of the wind turbine during the second cycle.

[0058] In this embodiment of the application, the energy management system can obtain the first active power Pr of all wind turbines in the second cycle. i and the first active rate Rr i And sum up the first active power Pr of all wind turbines in the second cycle. i The field-level active power feedback P of the wind farm in the second cycle is obtained. r And the sum of the first active power rate Rr of all wind turbines in the second cycle. i The field-level active power rate feedback R of the wind farm in the second cycle is obtained. r This provides a foundation for subsequent active power control and active rate control in wind farms.

[0059] In S120, for example, the target value P of the field-level active power can be calculated. set With the field-level active power feedback quantity P r The difference is used to obtain the field-level active power increment ΔP. That is, ΔP = P set -P r The field-level active power increment ΔP can be positive, negative, or 0.

[0060] Based on the field-level active power increment ΔP and the first active power Pr of each wind turbine in the previous cycle. i This allows us to determine the active power setpoint Pset for each wind turbine in the current cycle. i Active power setpoint Pset i Set a target value for the active power to be distributed to the wind turbine, in kW.

[0061] Active power setpoint Pset for each wind turbine in the current cycle i This refers to the target active power value of each wind turbine in the current cycle. Based on the active power setpoint of each wind turbine in the current cycle, the active power of each wind turbine can be adjusted so that the actual active power of each wind turbine in the current cycle is equal to or close to the active power setpoint Pset. i This is to meet the power grid's requirements for the active power of wind farms.

[0062] For example, the active power increment ΔP of each wind turbine can be determined based on the field-level active power increment ΔP and the number of wind turbines. i Then, based on the active power increment ΔP i And the first active power Pr of each wind turbine in the previous cycle i The active power setpoint Pset of each wind turbine unit in the current cycle is obtained. i .

[0063] For example, the field-level active power increment ΔP can also be input into a proportional-integral-derivative (PID) controller, and the PID controller can be used to correct the field-level active power increment ΔP to obtain the corrected field-level active power increment ΔP. set Then, based on the corrected field-level active power increment ΔP set Based on the actual active power of each wind turbine in the previous cycle, calculate the active power setpoint Pset for each wind turbine in the current cycle. i .

[0064] This application embodiment decomposes the target value of active power at the wind farm level and, in conjunction with the actual active power of each wind turbine, determines the set value of active power for each wind turbine. Based on the set value of active power for each wind turbine, active power control is performed on each wind turbine, thereby realizing closed-loop control of active power and meeting the grid's regulation requirements for the active power of the wind farm.

[0065] In S130, the active power setpoint Pset of each wind turbine unit in the current cycle is used. i The first active power Pr of each wind turbine in the previous cycle i and the field-level active power rate target value R set and field-level active power rate feedback quantity R r This allows us to determine the active power rate setpoint Rset for each wind turbine in the current cycle. i Active power rate setpoint Rset i The set target value for the active power rate sent to the wind turbine, in kW / s.

[0066] For example, the target value R of the field-level active power rate can be determined. set and field-level active power rate feedback quantity R r The field-level active power rate increment ΔR is calculated based on the field-level active power rate increment ΔR and the active power setpoint Pset of each wind turbine in the current cycle. i and the first active power Pr of each wind turbine in the previous cycle i It can calculate the active power rate setpoint Rset of each wind turbine in the current cycle. i .

[0067] For example, the target value of the field-level active power rate in the previous cycle and the feedback value R of the field-level active power rate in the current cycle can also be used. r The difference, relative to the target value R of the field-level active power rate in the current cycle. set The correction is then performed to obtain the correction result. Based on the correction result, the active power setpoint Pset of each wind turbine in the current cycle is considered. i and the first active power Pr of each wind turbine in the previous cycle i Calculate the active power rate setpoint Rset for each wind turbine in the current cycle. i .

[0068] This application embodiment achieves closed-loop control of the active power rate of the wind turbine while taking into account active power, so that the wind farm meets both active power regulation requirements and active power rate regulation requirements, thus avoiding problems such as large rate regulation deviation, poor accuracy, and uneven power regulation during the wind farm regulation process.

[0069] In S140, the active power setpoint Pset for each wind turbine is... i and active power rate setpoint Rset i Once determined, the active power setpoint Pset for each wind turbine can be used. i Active power control is performed on each wind turbine, and the active power rate setpoint Rset is calculated based on each wind turbine. i By controlling the active power rate of each wind turbine, the power regulation requirements of the power grid for the wind farm and the speed regulation requirements of the power grid for the wind farm are met, ensuring the smoothness and stability of the wind farm regulation process.

[0070] Figure 2 A flowchart illustrating an active power control method for a wind farm, provided as an embodiment of this application. Figure 2 and Figure 1 The difference is that, Figure 1 S120 in the text can be further refined into Figure 2 S2201-S2203 in the middle.

[0071] In S2201, based on the field-level active power target value P set With field-level active power feedback quantity P r The difference is used to determine the field-level active power correction ΔP of the wind farm in the first cycle. set .

[0072] For example, such as Figure 3 As shown, the target value of the field-level active power P can be... set With field-level active power feedback quantity P r The difference ΔP is input to the PID controller 301. Based on the proportional, integral, and derivative coefficients of the PID controller 301, the difference ΔP is processed to obtain the wind farm-level active power correction ΔP for the current cycle. set .

[0073] The proportional, integral, and derivative coefficients of the PID controller 301 can be preset and adjusted according to the scenario and requirements.

[0074] In S2202, based on the reference active power and the first active power Pr of each wind turbine in the second cycle... i Determine the field-level active power adjustment of the wind farm during the first cycle.

[0075] For example, such as Figure 3 As shown, the field-level active power correction ΔP output by the PID controller 301 can be corrected. set The input power distribution module 302 is used to determine the active power of each wind turbine in the previous cycle and the first active power Pr. iDetermine the field-level active power adjustment of the wind farm in the current cycle.

[0076] The reference active power can be preset and kept constant for each cycle, or it can be dynamically adjusted according to the actual operating conditions of each wind turbine. That is, the reference active power of the same wind turbine can be the same or different in different cycles. For example, the reference active power may include the theoretical active power of the wind turbine in each cycle, the boundary conditions of the active power, the active power control dead zone, etc. The boundary conditions of the active power may include the lower limit of active power and the upper limit of active power.

[0077] In practical applications, the wind farm's active power regulation within the current cycle can include both upward and downward regulation.

[0078] The reference active power includes the theoretical active power Pt of the wind turbine in the second cycle. i and the lower limit of active power Pd i For example, the field-level active power adjustment ΔP up The theoretical active power Pt of the wind turbine in the previous cycle can be used as a basis. i First active power Pr i The number of wind turbine units is determined. The regulation ΔP at the field level under active power is also determined. down The active power limit Pd of the wind turbine in the previous cycle can be used as a reference. i First active power Pr i The number of wind turbine units has been determined.

[0079] For example, Where n is the number of wind turbine units included in the wind farm.

[0080] In S2203, based on the field-level active power correction ΔP set The field-level active power regulation and the first active power Pr of each wind turbine. i Determine the active power setpoint Pset for each wind turbine unit during the first cycle. i .

[0081] For example, based on the field-level active power correction ΔP set Field-level active power upregulation ΔP up and the first active power Pr of each wind turbine i This allows us to determine the setpoint for the active power adjustment of each wind turbine unit within the current cycle. Based on the field-level active power correction amount ΔP... set Field-level active power regulation ΔP down and the first active power Pr of each wind turbine iThis allows us to determine the active power downward adjustment setpoint for each wind turbine unit within the current cycle. The active power upward adjustment setpoint and the active power downward adjustment setpoint are collectively referred to as the active power setpoint Pset. i .

[0082] The above determines the active power setpoint Pset. i The process can be made by Figure 3 The power distribution module 302 shown executes the operation, and ultimately outputs the active power setpoint Pset for each wind turbine unit. i The data is then distributed to each wind turbine for active power control. Figure 3 Taking three wind turbine units as an example, namely wind turbine unit A, wind turbine unit B and wind turbine unit C, in actual applications, more wind turbine units can be included.

[0083] This application's embodiments introduce a reference active power of the wind turbine generator, combined with the field-level active power target value P. set With field-level active power feedback quantity P r The difference between the values ​​and the actual active power of the wind turbines can be used to allocate appropriate active power setpoints to each wind turbine. By implementing closed-loop power control of the wind turbines, the power regulation requirements of the power grid for the wind farm can be met.

[0084] Figure 4 A flowchart illustrating another active power control method for a wind farm provided in an embodiment of this application. Figure 4 and Figure 2 The difference is that, Figure 2 S2203 in the text can be further refined into Figure 4 S22031-S22033 in the example.

[0085] In S22031, based on the field-level active power correction ΔP set The ratio of the field-level active power adjustment to the field-level active power distribution coefficient δ is used to determine the field-level active power distribution coefficient δ of the wind farm in the first cycle.

[0086] The field-level active power allocation coefficient δ is used to characterize the amount of active power allocated to each wind turbine in the wind farm. In this embodiment, the active power allocation coefficient of each wind turbine is the same. That is, the field-level active power allocation coefficient δ represents the active power allocation coefficient of each wind turbine.

[0087] For example, the field-level active power correction ΔP can be directly applied. set The ratio of the field-level active power adjustment to the field-level active power distribution factor δ is determined as the field-level active power distribution factor δ for the wind farm in the current cycle. Alternatively, the field-level active power correction factor ΔP can be determined first. setThe ratio of the field-level active power adjustment is corrected, and then the corrected ratio is determined as the field-level active power distribution coefficient δ of the wind farm in the current cycle.

[0088] The field-level active power regulation includes the field-level active power upward regulation ΔP. up For example, the field-level active power distribution coefficient δ = ΔP set / ΔP up The field-level active power regulation includes the field-level active power down-regulation ΔP. down For example, the field-level active power distribution coefficient δ = ΔP set / ΔP down .

[0089] In S22032, for each wind turbine, the first active power Pr of the wind turbine is determined. i The difference between the active power and the reference active power, and the product of the difference and the field-level active power distribution coefficient δ.

[0090] Taking the above adjustment as an example, the reference active power can include the theoretical active power Pt of the wind turbine in the second cycle. i At this point, for each wind turbine, the theoretical active power Pt of that wind turbine can be determined. i With the first active power Pr i First difference Pt i -Pr i and the first difference Pt i -Pr i The first product of the field-level active power distribution factor δ, exemplarily, is ΔP. upi =δ*(Pt) i -Pr i ), where ΔP upi This is the first product value.

[0091] Taking the lower limit as an example, the reference active power can include the lower limit Pd of the active power of the wind turbine in the second cycle. i At this point, for each wind turbine, the first active power Pr of that wind turbine can be determined. i With the lower limit of active power Pd i The second difference Pr i -Pd i and the second difference Pr i -Pd i The second product value with the field-level active power distribution factor δ, exemplarily, ΔP downi =δ*(Pt) i -Pr i ), where ΔP downi This is the second product value.

[0092] In S22033, based on the first active power Pr i The product value is used to determine the active power setpoint Pset of the wind turbine in the first cycle. i .

[0093] Taking the above adjustment as an example, the first active power Pr can be exemplarily... i With the first product value ΔP upi The cumulative sum is determined as the setpoint for adjusting the active power of the wind turbine in the first cycle. For example, Pupset... i =Pr i +ΔP upi Among them, Pupset i This is the setpoint for increasing the active power of the i-th wind turbine in the current cycle.

[0094] Taking the following adjustment as an example, the first active power Pr can be exemplarily adjusted. i With the second product value ΔP downi The third difference is determined as the setpoint for reducing the active power of the wind turbine during the first cycle. For example, Pdownset... i =Pr i -ΔP downi Among them, Pdownset i This is the setpoint for reducing the active power of the i-th wind turbine in the current cycle.

[0095] This application's embodiments introduce a reference active power for each wind turbine, and combine it with the actual active power of each wind turbine to obtain an active power allocation coefficient for each wind turbine. Then, based on the active power allocation coefficient, an active power setting value is reasonably allocated to each wind turbine, which can meet the power regulation requirements of the power grid for wind farms.

[0096] In some embodiments, prior to S130, the active power control method of the wind farm may further include the following steps:

[0097] Obtain the target value R of the field-level active power rate of the wind farm during the second cycle. s ′ et Using the wind farm's field-level active power rate target value R in the previous cycle. s ′ et It can compensate for the wind farm's field-level active rate target value R in the current cycle. set .

[0098] Figure 5 A flowchart illustrating another active power control method for a wind farm provided in an embodiment of this application. Figure 5 and Figure 1The difference is that, Figure 1 S130 in the middle can be further refined into Figure 5 S1301-S1302 in the middle.

[0099] In S1301, based on the target value R of the wind farm's field-level active power rate during the first cycle... set The target value of the field-level active power rate R of the wind farm during the second cycle s ′ et and field-level active power rate feedback quantity R r Determine the field-level active power rate correction R of the wind farm during the first cycle. s " et .

[0100] Using the wind farm's field-level active power rate target value R in the previous cycle s ′ et For the target value R of the field-level active power rate in the current cycle set The correction takes into account the operating status of the wind farm in a continuous cycle, which can more accurately adjust the active power rate of the wind turbine in the current cycle.

[0101] For example, the target value R of the wind farm's field-level active power rate during the second cycle can be determined. s ′ et With field-level active power rate feedback quantity R r The fourth difference R s ′ et -R r ;

[0102] According to the fourth difference R s ′ et -R r The target value R of the field-level active power rate of the wind farm in the first cycle. set Compensation is performed to obtain the field-level active power rate correction R. s ″ et .

[0103] like Figure 6 As shown, the target value R of the wind farm's field-level active power rate in the previous cycle can be calculated. s ′ et The field-level active power rate feedback R of the wind farm in the current cycle r The fourth difference R s ′ et -R r Then calculate the fourth difference R.s ′ et -R r The target value of the field-level active power rate R of the wind farm in the current cycle set The sum of these values ​​serves as the field-level active power rate correction R for the wind farm in the current cycle. s ″ et To achieve the target value R of the field-level active power rate in the current cycle. set Corrections.

[0104] For example, R s ″ et =R set +R s ′ et -R r The field-level active power rate correction in the previous cycle is used to correct the field-level active power rate correction in the current cycle. Then, the active power rate of the wind turbine is adjusted according to the corrected field-level active power rate correction, making the wind farm regulation more stable and reliable, and the power change smoother.

[0105] In S1302, based on the field-level active power rate correction R s ″ et The active power setpoint Pset of each wind turbine unit in the first cycle i and the first active power Pr of each wind turbine i Determine the active power rate setpoint Rset for each wind turbine during the first cycle. i .

[0106] like Figure 6 As shown, the power distribution module 302 can allocate the first active power Pr of each wind turbine in the previous cycle. i And the calculated active power setpoint Pset for each wind turbine in the current cycle. i The data is sent to the rate allocation module 601, which then allocates the data based on the first active power Pr of each wind turbine in the previous cycle. i And the active power setpoint Pset of each wind turbine in the current cycle. i Combined with the field-level active power rate correction R s ″ et Calculate the active power rate setpoint Rset for each wind turbine in the current cycle. i While ensuring that power control meets grid requirements, the wind farm's speed adjustment also meets grid requirements.

[0107] In some embodiments, S1302 above may include the following steps:

[0108] Based on the reference active power and the first active power Pr of each wind turbine in the second cycle i Determine the field-level active power adjustment of the wind farm during the first cycle;

[0109] Based on the field-level active power regulation and the field-level active rate correction R s ″ et The ratio of t to t is used to determine the active power rate regulation time t of the wind farm in the first cycle.

[0110] For each wind turbine, based on the active power setpoint Pset of the wind turbine in the first cycle. i The ratio of the active power rate regulation duration t to the active power rate setpoint Rset of the wind turbine in the first cycle is used to determine the active power rate setpoint Rset of the wind turbine. i .

[0111] The process for determining the field-level active power adjustment of a wind farm in the previous cycle can be found in the above embodiments, and will not be repeated here for the sake of brevity.

[0112] The field-level active power regulation includes the field-level active power upward regulation ΔP. up For example, based on the field-level active power adjustment ΔP up With field-level active power rate correction R s ″ et The ratio of these two values ​​can be used to determine the active power rate regulation time t of the wind farm in the current cycle. up .

[0113] For example, the field-level active power adjustment ΔP can be used to adjust the field level active power. up With field-level active power rate correction R s ″ et The ratio is determined as the active power rate regulation time t of the wind farm in the current cycle. up , i.e. t up =ΔP up / R s " et For example, the adjustment amount ΔP of the field-level active power can also be adjusted. up With field-level active power rate correction R s " et The ratio is corrected, and the corrected ratio is determined as the active power rate regulation time t. up .

[0114] The field-level active power regulation includes the field-level active power down-regulation ΔP.down For example, based on the field-level active power adjustment ΔP down With field-level active power rate correction R s " et The ratio of these two values ​​can be used to determine the active power rate regulation time t of the wind farm in the current cycle. down The modification process is not limited in the embodiments of this application.

[0115] For example, the field-level active power downregulation ΔP can be... down With field-level active power rate correction R s " et The ratio is determined as the active power rate regulation time t of the wind farm in the current cycle. down , i.e. t down =ΔP down / R s " et For example, the adjustment amount ΔP under the field-level active power can also be adjusted. down With field-level active power rate correction R s " et The ratio is corrected, and the corrected ratio is determined as the active power rate regulation time ΔP. down The modification process is not limited in the embodiments of this application.

[0116] For each wind turbine, based on the active power setpoint Pset of that wind turbine in the current cycle. i The ratio of the active rate setting value Rset to the active rate regulation duration t can be used to determine the active rate setpoint Rset of the wind turbine in the current cycle. i .

[0117] For example, when Rupset is adjusted upwards... i =Pupset i / t up When downsetting, Rdownset i =Pdownset i / t down Among them, Rupset i To increase the active power rate setting, Rdownset i The active power rate setting value is the setpoint for both downward adjustment and upward adjustment.

[0118] The embodiments of this application can combine the active power setting value of each wind turbine to determine the adjustment time of the active power rate, and then determine the active power rate setting value of each wind turbine based on the adjustment time. This allows the power adjustment to be carried out at a certain slope, avoiding the problems of power adjustment being too fast or too slow.

[0119] In some embodiments, the above S140 may include the following steps:

[0120] For each wind turbine, if the active power parameter setpoint of the wind turbine is within the allowable range of active power parameters, the active power parameter setpoint of the wind turbine will be sent to the wind turbine so that the wind turbine can operate according to the active power parameter setpoint in the first cycle.

[0121] If the active power parameter set value of the wind turbine is not within the allowable range of active power parameters, the boundary value of the allowable range of active power parameters will be sent to the wind turbine so that the wind turbine will operate according to the boundary value of the allowable range of active power parameters in the first cycle.

[0122] Among them, the active power parameter setting values ​​include the active power setting value and the active power rate setting value.

[0123] Figure 7 This is a logic diagram of active power control for a wind turbine provided in an embodiment of this application. The active power rate setpoint Rset for each wind turbine in the current cycle can be obtained through the rate allocation module 601. i Through the power distribution module 302, the active power setpoint Pset of each wind turbine in the current cycle can be obtained. i .

[0124] The instruction processing module 701 is used to process the active power rate setpoint Rset of each wind turbine. i and active power setpoint Pset i The active power control commands for each wind turbine are obtained through combined processing, and then the active power control commands are sent to each wind turbine.

[0125] In some embodiments, the instruction processing module 701 can process the received active power rate setpoint Rset. i and active power setpoint Pset i Perform range verification, i.e., determine the active power rate setpoint Rset. i and active power setpoint Pset i Is it within the corresponding allowed range?

[0126] Verify the active power rate setpoint Rset i For example, if there is a power rate setpoint Rset i If the active power rate is within the allowable range, the active power rate setpoint Rset can be maintained. i If the power rate setpoint Rset remains unchanged, i If the active power rate exceeds the allowable range, the actually calculated active power rate setpoint Rset can be adjusted based on the allowable range. i .

[0127] For example, when the actual calculated active power rate setpoint Rset i When the value exceeds the maximum value of the allowable active power rate range, the maximum value of the allowable active power rate range can be used as the final active power rate setpoint Rset. i When the actual calculated active power rate setpoint Rset i When the value is less than the minimum value of the active power rate allowable range, the minimum value of the active power rate allowable range can be used as the final active power rate setpoint Rset. i Therefore, the final active power rate setpoint Rset for each wind turbine unit can be guaranteed. i All are within the allowable range of active power rate.

[0128] Active power setpoint Pset i The verification process and the active power rate setpoint Rset i The verification process is similar and will not be repeated here.

[0129] The verified active power setpoint Pset i and active power rate setpoint Rset i It can be combined and distributed to the corresponding wind turbine units, which will then operate according to the corresponding active power setpoint Pset. i and active power rate setpoint Rset i implement.

[0130] In this embodiment of the application, the active power setpoint Pset is... i and active power rate setpoint Rset i Before sending the data to the corresponding wind turbine, the active power setpoint Pset must be adjusted. i and active power rate setpoint Rset i Perform a verification so that the verified active power setpoint Pset is... i and active power rate setpoint Rset i All of these meet the corresponding allowable ranges, improving the active power control effect of the wind farm and meeting the grid's requirements for wind farm power and speed.

[0131] If a wind turbine's active power target value in the previous cycle was 90 MW, its active power setpoint in the current cycle was 18 MW, its active power rate setpoint in the current cycle was 27 MW / min, and its active power setpoint in the next cycle was 90 MW, then the active power regulation curve can be found in [reference needed]. Figure 8 This means that the active power of the wind turbine can reach the set value within two minutes.

[0132] Let's assume a wind turbine's active power setpoint was 90 MW in the previous cycle, and its active power setpoint is 18 MW in the current cycle, but its active power rate setpoint is 18 MW / min. If the active power setpoint remains 90 MW in the next cycle, then the active power regulation curve for this wind turbine can be found in [reference needed]. Figure 9 That is, the active power of the wind turbine can reach the set value in four minutes.

[0133] Depend on Figure 8 and Figure 9 As can be seen, by implementing active power rate control on the wind turbine, the active power of the wind turbine can be adjusted at a certain slope, avoiding situations where the adjustment is too fast or too slow. The red curve represents the setpoint active power, and the black curve represents the actual active power.

[0134] Figure 10 A structural diagram of a wind farm active power control device provided in an embodiment of this application is shown below. Figure 10 As shown, the active power control device 100 of the wind farm includes:

[0135] The acquisition module 101 is used to acquire the target value of the active power and the target value of the active power rate of the wind farm in the first cycle, the first active power of each wind turbine in the second cycle, and the feedback amount of the active power and the feedback amount of the active power of the wind farm in the second cycle. The second cycle is the cycle preceding the first cycle.

[0136] The first determining module 102 is used to determine the active power set value of each wind turbine in the first cycle based on the difference between the field-level active power target value and the field-level active power feedback value, and the first active power of each wind turbine in the second cycle.

[0137] The second determining module 103 is used to determine the active power setting value of each wind turbine in the first cycle based on the active power setting value of each wind turbine in the first cycle, the first active power of each wind turbine in the second cycle, the field-level active power rate target value and the field-level active power rate feedback.

[0138] The control module 104 is used to perform active power control on each wind turbine in the first cycle according to the active power set value and active power rate set value of each wind turbine.

[0139] This embodiment of the application assigns corresponding power setpoints to each wind turbine based on the actual output power of each wind turbine in the previous cycle and the target value of the wind farm's active power in the current cycle, thus achieving closed-loop control of active power. Simultaneously, based on the actual speed of each wind turbine in the previous cycle, the target value of the wind farm's active power rate, and the target value of the wind farm's active power rate and active power setpoints in the current cycle, it assigns corresponding speed setpoints to each wind turbine, thus achieving closed-loop control of active power rate. In other words, this embodiment of the application controls the active power and active power rate of the wind turbines through two closed-loop controls, ensuring that both power control and wind farm speed control meet requirements.

[0140] In some embodiments, the first determining module 102 is specifically used for:

[0141] The field-level active power correction amount in the first cycle is determined based on the difference between the field-level active power target value and the field-level active power feedback amount.

[0142] Based on the reference active power and the first active power of each wind turbine in the second cycle, determine the field-level active power adjustment amount of the wind farm in the first cycle.

[0143] Based on the field-level active power correction, field-level active power adjustment, and the first active power of each wind turbine, the active power setpoint for each wind turbine in the first cycle is determined.

[0144] In some embodiments, the first determining module 102 is specifically used for:

[0145] The field-level active power distribution coefficient of the wind farm in the first cycle is determined based on the ratio of the field-level active power correction and the field-level active power adjustment.

[0146] For each wind turbine, determine the difference between the first active power and the reference active power of the wind turbine, and the product of the difference and the field-level active power allocation coefficient.

[0147] Based on the first active power and the product value, determine the active power setpoint of the wind turbine in the first cycle.

[0148] In some embodiments, the active power setpoint includes an active power upward adjustment setpoint and an active power downward adjustment setpoint, and the reference active power includes the theoretical active power and the lower limit of active power of the wind turbine in the second cycle.

[0149] The first determining module 102 is specifically used for:

[0150] For each wind turbine, determine the first difference between the theoretical active power and the first active power of the wind turbine, and the second difference between the first active power and the lower limit of the active power of the wind turbine.

[0151] Calculate the first product of the first difference and the field-level active power distribution coefficient, and the second product of the second difference and the field-level active power distribution coefficient;

[0152] The sum of the first active power and the first product value is determined as the set value for adjusting the active power of the wind turbine in the first cycle.

[0153] The third difference between the first active power and the second product value is determined as the set value for reducing the active power of the wind turbine in the first cycle.

[0154] In some embodiments, the acquisition module 101 is further configured to acquire the field-level active rate target value of the wind farm in the second cycle before the second determination module 103 determines the active rate set value of each wind turbine in the first cycle based on the active power set value of each wind turbine in the first cycle, the first active power of each wind turbine in the second cycle, the field-level active rate target value and the field-level active rate feedback.

[0155] The second determining module 103 is specifically used for:

[0156] Based on the target value of the active power rate at the wind farm level in the first cycle, the target value of the active power rate at the wind farm level in the second cycle, and the active power rate feedback, determine the correction amount of the active power rate at the wind farm level in the first cycle.

[0157] Based on the field-level active power rate correction, the active power setpoint of each wind turbine in the first cycle, and the first active power of each wind turbine, the active power setpoint of each wind turbine in the first cycle is determined.

[0158] In some embodiments, the second determining module 103 is specifically used for:

[0159] Determine the fourth difference between the target value of the wind farm's active power rate and the feedback value of the wind farm's active power rate during the second cycle;

[0160] Based on the fourth difference, the target value of the active power rate of the wind farm in the first cycle is compensated to obtain the field-level active power rate correction.

[0161] In some embodiments, the second determining module 103 is specifically used for:

[0162] Based on the reference active power and the first active power of each wind turbine in the second cycle, determine the field-level active power adjustment amount of the wind farm in the first cycle.

[0163] The active power regulation duration of the wind farm in the first cycle is determined based on the ratio of the field-level active power regulation to the field-level active power rate correction.

[0164] For each wind turbine, the active power setpoint for the wind turbine in the first cycle is determined based on the ratio of the active power setpoint to the active power rate adjustment duration in the first cycle.

[0165] In some embodiments, the control module 104 is specifically used for:

[0166] For each wind turbine, if the active power parameter setpoint of the wind turbine is within the allowable range of active power parameters, the active power parameter setpoint of the wind turbine will be sent to the wind turbine so that the wind turbine can operate according to the active power parameter setpoint in the first cycle.

[0167] If the active power parameter set value of the wind turbine is not within the allowable range of active power parameters, the boundary value of the allowable range of active power parameters will be sent to the wind turbine so that the wind turbine will operate according to the boundary value of the allowable range of active power parameters in the first cycle.

[0168] Among them, the active power parameter setting values ​​include the active power setting value and the active power rate setting value.

[0169] The active power control device for wind farms provided in this application embodiment can achieve... Figures 1-5 The various processes in the active power control method embodiment of the wind farm shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0170] Figure 11 A structural diagram of an active power control system for a wind farm provided in an embodiment of this application is shown below. Figure 11 As shown, the active power control system 110 of the wind farm may include an AGC substation 1101, an energy management system 1102, and N wind turbine generators 1103, where N is an integer greater than 1. Figure 11 Taking N=4 as an example, in practical applications, N can be greater than 4 or less than 4.

[0171] Among them, AGC substation 1101 and AGC main station ( Figure 11 (Not shown) communicates with the energy management system 1102. The AGC master station is the automatic power generation control system on the grid dispatch side, and the AGC substation 1101 is the automatic power generation control system on the wind farm side. The AGC substation 1101 receives the control commands from the AGC master station and performs power regulation within the wind farm.

[0172] The energy management system 1102 connects to the AGC substation 1101 to dynamically control the wind turbine 1103 in order to meet the power grid's active power control requirements for the wind farm.

[0173] Specifically, the AGC substation 1101 is used to receive control commands from the AGC master station and send the target values ​​of the field-level active power and the field-level active rate of the wind farm in the first cycle to the energy management system 1102.

[0174] The energy management system 1102 is used to acquire the first active power of each wind turbine 1103 in the second cycle, the field-level active power feedback and the field-level active power rate feedback of the wind farm in the second cycle, and determine the active power setpoint of each wind turbine 1103 in the first cycle based on the difference between the field-level active power target value and the field-level active power feedback, and the first active power of each wind turbine 1103 in the second cycle; determine the active power rate setpoint of each wind turbine 1103 in the first cycle based on the active power setpoint, the first active power of each wind turbine 1103 in the second cycle, the field-level active power rate target value and the field-level active power rate feedback; and perform active power control on each wind turbine 1103 in the first cycle based on the active power setpoint and the active power rate setpoint.

[0175] The second cycle is the cycle preceding the first cycle.

[0176] This embodiment of the application assigns corresponding power setpoints to each wind turbine based on the actual output power of each wind turbine in the previous cycle and the target value of the wind farm's active power in the current cycle, thus achieving closed-loop control of active power. Simultaneously, based on the actual speed of each wind turbine in the previous cycle, the target value of the wind farm's active power rate, and the target value of the wind farm's active power rate and active power setpoints in the current cycle, it assigns corresponding speed setpoints to each wind turbine, thus achieving closed-loop control of active power rate. In other words, this embodiment of the application controls the active power and active power rate of the wind turbines through two closed-loop controls, ensuring that both power control and wind farm speed control meet requirements.

[0177] For specific details, please refer to the above embodiments. For the sake of brevity, they will not be repeated here.

[0178] Figure 12 An architecture diagram of an energy management system provided in this application embodiment is shown below. Figure 12 As shown, the energy management system 120 may include an interaction layer 1201, a strategy layer 1202, a basic layer 1203, and an operation and maintenance debugging center 1204.

[0179] The basic layer 1203 is used to provide the basic functions of the energy management system 120, mainly including two parts: data storage and support functions. Data storage can support databases such as SQLite and Redis, as well as high-speed shared memory and waveform files. The support functions provide basic support for the energy management system 120, including data acquisition, data processing, and data computer control and distribution.

[0180] The strategy layer 1202 is used to provide control strategies, including power control, rate control, sector control, ramp control and frequency modulation control, etc. For example, in the embodiments of this application, it is mainly used for power control.

[0181] The interaction layer 1201 is used to provide human-computer interaction functions, such as real-time data display, real-time status monitoring, historical data query, system indicator analysis, system report export, and control of the soft pressure plate.

[0182] Operation and Maintenance Debugging Center 1204 is used to provide a set of operation and maintenance debugging functions, mainly to support system operation and maintenance debugging, including functions such as deployment configuration, system upgrade, system recovery, communication debugging, control debugging and setting value issuance.

[0183] This application embodiment uses two closed-loop controls, power and speed, to ensure that the wind farm speed adjustment also meets the requirements while ensuring that the power control meets the requirements, making the wind farm regulation more stable and reliable and the power change smoother.

[0184] Furthermore, in conjunction with the active power control method for wind farms in the above embodiments, this application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the active power control methods for wind farms in the above embodiments.

[0185] Furthermore, in conjunction with the active power control method for wind farms in the above embodiments, this application embodiment can provide a computer program product for implementation. This computer program product includes a computer program that, when executed by a processor, implements any of the active power control methods for wind farms described in the above embodiments.

[0186] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for active power control in a wind farm, characterized in that, include: Obtain the target value P of the wind farm's field-level active power during the first cycle. set and field-level active power rate target value R set The first active power Pr of each wind turbine in the second cycle i The field-level active power feedback P of the wind farm during the second cycle r and field-level active power rate feedback quantity R r The second period is the period preceding the first period; According to the target value P of the field-level active power set With the field-level active power feedback quantity P r The difference, and the first active power Pr of each wind turbine in the second cycle. i Determine the active power setpoint Pset of each wind turbine unit in the first cycle. i ; According to the active power setpoint Pset of each wind turbine in the first cycle i The first active power Pr of each wind turbine in the second cycle i The target value of the field-level active power rate R set and the field-level active power rate feedback quantity R r Determine the active power rate setpoint Rset for each wind turbine unit during the first cycle. i ; According to the active power setting value Pset of each wind turbine unit i and active power rate setpoint Rset i Active power control is performed on each of the wind turbine units within the first cycle.

2. The method according to claim 1, characterized in that, The active power target value P of the field level set With the field-level active power feedback quantity P r The difference, and the first active power Pr of each of the wind turbine units. i Determine the active power setpoint Pset of each wind turbine unit in the first cycle. i ,include: According to the target value P of the field-level active power set With the field-level active power feedback quantity P r The difference is used to determine the field-level active power correction ΔP of the wind farm during the first cycle. set ; Based on the reference active power and the first active power Pr of each wind turbine in the second cycle. i Determine the field-level active power adjustment (ΔP) of the wind farm during the first cycle. up and ΔP down ); According to the field-level active power correction amount ΔP set The field-level active power regulation (ΔP) up and ΔP down ) and the first active power Pr of each of the aforementioned wind turbine units i Determine the active power setpoint Pset of each wind turbine unit in the first cycle. i .

3. The method according to claim 2, characterized in that, The correction amount ΔP based on the field-level active power set The field-level active power regulation (ΔP) up and ΔP down ) and the first active power Pr of each of the aforementioned wind turbine units i Determine the active power setpoint Pset of each wind turbine unit in the first cycle. i ,include: According to the field-level active power correction amount ΔP set and the field-level active power regulation (ΔP) up and ΔP down The ratio of the value ... For each wind turbine, determine the first active power Pr of the wind turbine. i The difference between the active power and the reference active power, and the product of the difference and the field-level active power allocation coefficient δ; According to the first active power Pr i The active power setpoint Pset of the wind turbine in the first cycle is determined by multiplying the product value with the product value. i .

4. The method according to claim 3, characterized in that, The active power setpoint includes an active power upward adjustment setpoint and an active power downward adjustment setpoint, and the reference active power includes the theoretical active power Pt of the wind turbine in the second cycle. i and the lower limit of active power Pd i ; For each wind turbine, the first active power Pr of the wind turbine is determined. i The difference between the active power and the reference active power, and the product of the difference and the field-level active power allocation coefficient δ, include: For each wind turbine, determine the theoretical active power Pt of the wind turbine. i With the first active power Pr i First difference Pt i -Pr i and the first active power Pr of the wind turbine i With the aforementioned lower limit of active power Pd i The second difference Pr i -Pd i ; Calculate the first difference Pt i -Pr i The product of the first product of the field-level active power distribution coefficient δ and the second difference Pr i -Pd i The second product value with the field-level active power distribution coefficient δ; The first active power Pr i The active power setpoint Pset of the wind turbine in the first cycle is determined by multiplying the product value with the product value. i ,include: The first active power Pr i The sum of the product value and the first product value is determined as the active power adjustment set value of the wind turbine in the first cycle; The first active power Pr i The third difference between the product value and the second product value is determined as the set value for reducing the active power of the wind turbine in the first cycle.

5. The method according to claim 1, characterized in that, The active power setpoint Pset of each wind turbine in the first cycle is used. i The first active power Pr of each wind turbine in the second cycle i The target value of the field-level active power rate R set and the field-level active power rate feedback quantity R r Determine the active power rate setpoint Rset for each wind turbine unit during the first cycle. i Previously, the method also included: Obtain the target value R of the wind farm's field-level active power rate during the second cycle. s ′ et ; The active power setpoint Pset of each wind turbine in the first cycle is used. i The first active power Pr of each wind turbine in the second cycle i The target value of the field-level active power rate R set and the field-level active power rate feedback quantity R r Determine the active power rate setpoint Rset for each wind turbine unit during the first cycle. i ,include: Based on the target value R of the wind farm's field-level active power rate during the first cycle. set The target value of the field-level active power rate R of the wind farm during the second period. s ′ et and the field-level active power rate feedback quantity R r Determine the field-level active power rate correction R of the wind farm during the first cycle. s " et ; According to the field-level active power rate correction R s ″ et The active power setpoint Pset of each wind turbine unit in the first cycle i and the first active power Pr of each of the aforementioned wind turbine units i Determine the active power rate setpoint Rset for each wind turbine unit during the first cycle. i .

6. The method according to claim 5, characterized in that, The target value R of the wind farm's field-level active power rate during the first cycle. set The target value of the field-level active power rate R of the wind farm during the second period. s ′ et and the field-level active power feedback quantity P r Determine the field-level active power rate correction R of the wind farm during the first cycle. s ″ et ,include: Determine the target value R of the wind farm's field-level active power rate during the second cycle. s ′ et With the field-level active power rate feedback quantity R r The fourth difference R s ′ et -R r ; According to the fourth difference R s ′ et -R r The target value R of the field-level active power rate of the wind farm during the first cycle. set Compensation is performed to obtain the field-level active power rate correction amount R. s " et .

7. The method according to claim 5, characterized in that, The correction amount R based on the field-level active power rate s " et The active power setpoint Pset of each wind turbine unit in the first cycle i and the first active power Pr of each of the aforementioned wind turbine units i Determine the active power rate setpoint Rset for each wind turbine unit during the first cycle. i ,include: Based on the reference active power and the first active power Pr of each wind turbine in the second cycle. i Determine the field-level active power adjustment (ΔP) of the wind farm during the first cycle. up and ΔP down ); According to the field-level active power adjustment (ΔP) up and ΔP down ) and the field-level active power rate correction R s " et The ratio is used to determine the active power rate adjustment duration t of the wind farm in the first cycle; For each wind turbine, based on the active power setpoint Pset of the wind turbine in the first cycle. i The ratio of the active power rate adjustment duration t to the active power rate setpoint Rset of the wind turbine generator in the first cycle is used to determine the active power rate setpoint Rset of the wind turbine generator in the first cycle. i .

8. The method according to any one of claims 1-7, characterized in that, The active power setpoint Pset of each wind turbine unit i and active power rate setpoint Rset i Active power control is performed on each of the wind turbine units within the first cycle, including: For each wind turbine, if the active power parameter setting value of the wind turbine is within the allowable range of active power parameters, the active power parameter setting value of the wind turbine is sent to the wind turbine so that the wind turbine operates according to the active power parameter setting value in the first cycle. If the active power parameter set value of the wind turbine is not within the allowable range of active power parameters, the boundary value of the allowable range of active power parameters is sent to the wind turbine so that the wind turbine operates according to the boundary value of the allowable range of active power parameters within the first cycle. The active power parameter setting value includes the active power setting value and the active power rate setting value.

9. An active power control device for a wind farm, characterized in that, include: The acquisition module is used to acquire the target value P of the wind farm's field-level active power during the first cycle. set and field-level active power rate target value R set The first active power Pr of each wind turbine in the second cycle i The field-level active power feedback P of the wind farm during the second cycle r and field-level active power rate feedback quantity R r The second period is the period preceding the first period; The first determining module is used to determine the target value P of the field-level active power. set With the field-level active power feedback quantity P r The difference, and the first active power Pr of each wind turbine in the second cycle. i Determine the active power setpoint Pset of each wind turbine unit in the first cycle. i ; The second determining module is used to determine the active power setpoint Pset of each wind turbine in the first cycle. i The first active power Pr of each wind turbine in the second cycle i The target value of the field-level active power rate R set and the field-level active power rate feedback quantity R r Determine the active power rate setpoint Rset for each wind turbine unit during the first cycle. i ; The control module is used to determine the active power setpoint Pset of each wind turbine. i and active power rate setpoint Rset i Active power control is performed on each of the wind turbine units within the first cycle.

10. An active power control system for a wind farm, characterized in that, include: An automatic generation control (AGC) substation, an energy management system, and N wind turbine units, where N is an integer greater than 1; The AGC substation is used to receive control commands from the AGC master station and to set the target value P of the wind farm's active power at the field level in the first cycle in the control command. set and field-level active power rate target value R set Send to the energy management system; The energy management system is used to obtain the first active power Pr of each wind turbine in the second cycle. i The field-level active power feedback P of the wind farm during the second cycle r and field-level active power rate feedback quantity R r And according to the target value P of the field-level active power set With the field-level active power feedback quantity P r The difference, and the first active power Pr of each wind turbine in the second cycle. i Determine the active power setpoint Pset of each wind turbine unit in the first cycle. i According to the active power setpoint Pset of each wind turbine unit in the first cycle. i The first active power Pr of each wind turbine in the second cycle i The target value of the field-level active power rate R set and the field-level active power rate feedback quantity R r Determine the active power rate setpoint Rset for each wind turbine unit during the first cycle. i According to the active power setpoint Pset of each wind turbine unit. i and active power rate setpoint Rset i Active power control is performed on each of the wind turbine units in the first cycle; The second period is the period preceding the first period.

11. A computer-readable storage medium storing computer program instructions thereon, characterized in that, When the computer program instructions are executed by the processor, the method as described in any one of claims 1-8 is implemented.

12. A computer program product, characterized in that, Includes a computer program, which, when executed by a processor, implements the method as described in any one of claims 1-8.

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