Wind storage electric field power control method, device, equipment, medium and program product

Abstract

The invention discloses a power control method, device and equipment for a wind storage electric field, a medium and a program product, and relates to the technical field of power systems, and the disclosed power control method for the wind storage electric field comprises the steps that when a primary frequency modulation function and / or an inertia response function of the wind storage electric field are / is triggered, the primary frequency modulation function and / or the inertia response function are / is triggered; the target active loss value corresponding to the current working condition of the wind storage electric field is determined from the preset active loss value lookup table, the current target total power of the wind storage electric field is corrected, and the power of the wind storage electric field is controlled through the corrected target total power. The problems of how to accurately estimate the active loss value of the wind storage electric field and how to reduce the fluctuation of the frequency regulation process of the wind storage electric field are solved.

Description

Technical Field

[0001] The present application relates to the technical field of power systems, and particularly to a power control method, device, equipment, medium and program product for a wind storage power plant. Background Art

[0002] In the related art, in a wind storage power plant, the inertia response function and the primary frequency regulation function can be used to improve the inertia characteristics and frequency characteristics of the large power grid and improve the power quality of the large power grid. Among them, both the inertia response function and the primary frequency regulation function are combined with the estimated value of the active power loss of the wind storage power plant to achieve fast frequency response control of the wind storage power plant.

[0003] However, in the actual use process, the active power loss changes non-linearly, and the situation of inaccurate estimated value of the active power loss often occurs, resulting in large fluctuations in the frequency regulation process of the wind storage power plant. Therefore, how to accurately estimate the active power loss value of the wind storage power plant and reduce the fluctuations in the frequency regulation process of the wind storage power plant is an urgent problem to be solved. Summary of the Invention

[0004] The main purpose of the present application is to provide a power control method, device, equipment, medium and program product for a wind storage power plant, aiming to solve the technical problem of how to accurately estimate the active power loss value of the wind storage power plant and reduce the fluctuations in the frequency regulation process of the wind storage power plant.

[0005] To achieve the above purpose, the present application proposes a power control method for a wind storage power plant, and the power control method for a wind storage power plant includes:

[0006] When it is detected that the primary frequency regulation function and / or the inertia response function of the wind storage power plant is triggered, obtain the first current target power of the wind power generation system in the wind storage power plant and the second current target power of the energy storage system.

[0007] Determine at least one adjacent wind power corresponding to the first current target power and at least one adjacent energy storage power corresponding to the second current target power from a preset active power loss value query table, where the preset active power loss value query table is a three-dimensional table, and the preset active power loss value query table includes the corresponding relationship between multiple preset wind powers, multiple preset energy storage powers and multiple preset active power loss values. A preset wind power, a preset energy storage power and a preset active power loss value correspond to a preset working condition of the wind storage power plant.

[0008] Determine the target active power loss value of the wind storage power plant according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power.

[0009] Use the target active power loss value to correct the current target total power of the wind storage power plant to obtain the corrected target total power.

[0010] Perform power control on the wind power generation system and the energy storage system by using the corrected target total power.

[0011] In one embodiment, the adjacent wind power includes a first preset wind power and a second preset wind power, the adjacent energy storage power includes a first preset energy storage power and a second preset energy storage power, the first preset wind power and the first preset energy storage power correspond to a first preset working condition, the first preset wind power and the second preset energy storage power correspond to a second preset working condition, the second preset wind power and the first preset energy storage power correspond to a third preset working condition, and the second preset wind power and the second preset energy storage power correspond to a fourth preset working condition;

[0012] The steps of determining the target active power loss value of the wind and energy storage power plant according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power include:

[0013] Determine a first loss difference between a first preset active power loss value under the first preset working condition and a second preset active power loss value under the second preset working condition, a second loss difference between the first preset active power loss value and a third preset active power loss value under the third preset working condition, a third loss difference between the third preset active power loss value and a fourth preset active power loss value under the fourth preset working condition from the preset active power loss value lookup table, and determine a fourth loss difference between the second preset active power loss value and the fourth preset active power loss value;

[0014] Obtain a first difference between the first loss difference and the third loss difference, and a second difference between the second loss difference and the fourth loss difference;

[0015] Take the arithmetic mean of the first difference and the second difference as the target active power loss value of the wind and energy storage power plant.

[0016] In one embodiment, the adjacent wind power includes a third preset wind power, and the adjacent energy storage power includes a third preset energy storage power;

[0017] The steps of determining the target active power loss value of the wind and energy storage power plant according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power include:

[0018] Take the preset active power loss value corresponding to the third preset wind power and the third preset energy storage power in the preset active power loss value lookup table as the target active power loss value of the wind and energy storage power plant.

[0019] In one embodiment, the steps of obtaining the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind and energy storage power plant include:

[0020] Obtain the primary frequency regulation power change and / or the inertia response power change of the grid connection point of the wind power generation system in the wind-storage power plant;

[0021] Determine the superimposed power change according to the primary frequency regulation power change and / or the inertia response power change;

[0022] If the absolute value of the superimposed power change is less than the absolute value of the preset power change, then determine the total power change according to the primary frequency regulation power change and / or the inertia response power change, and the automatic control power change of the wind-storage power plant;

[0023] Determine the current target total power of the wind-storage power plant according to the current total power and the total power change of the wind-storage power plant;

[0024] Compare the current target total power with the first total power of the maximum power generation of the wind power generation system and the maximum discharge power of the energy storage system, and compare the current target total power with the second total power of the minimum power generation of the wind power generation system and the maximum charging power;

[0025] If the current target total power is greater than the first total power, then control the maximum power generation as the first current target power of the wind power generation system, and control the maximum discharge power as the second current target power of the energy storage system;

[0026] If the current target total power is less than the second total power, then control the minimum power generation as the first current target power, and control the maximum charging power as the second current target power;

[0027] If the current target total power is less than or equal to the first total power, or the current target total power is less than or equal to the second total power, then compare the current target total power with the third total power of the maximum power generation and the maximum charging power;

[0028] If the current target total power is greater than the third total power, then control the maximum power generation as the first current target power, and control the difference between the current target total power and the maximum power generation as the second current target power;

[0029] If the current target total power is less than or equal to the third total power, then control the maximum charging power as the first current target power, and control the difference between the current target total power and the maximum charging power as the second current target power.

[0030] In an embodiment, before the step of obtaining the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind-storage power plant, the wind-storage power plant power control method further includes:

[0031] Obtain the grid connection point frequency of the wind power generation system in the wind-storage power plant;

[0032] Compare the grid connection point frequency with the deadband ranges of the primary frequency regulation function and the inertia response function;

[0033] If the grid connection point frequency is not within the deadband range of the primary frequency regulation function, the primary frequency regulation function of the wind and storage power plant is triggered;

[0034] If the grid connection point frequency is not within the deadband range of the inertia response function, the inertia response function of the wind and storage power plant is triggered.

[0035] In one embodiment, the power control method for the wind and storage power plant further includes:

[0036] In the case where the primary frequency regulation function of the wind and storage power plant is not detected to be triggered and the inertia response function of the wind and storage power plant is not detected to be triggered, determine whether the primary frequency regulation function and / or the inertia response function of the wind and storage power plant is triggered in the previous control period before the current control period;

[0037] If the primary frequency regulation function is triggered in the previous control period and / or the inertia response function is triggered in the previous control period, obtain the first actual active power of the wind power generation system and the second actual active power of the energy storage system in the wind and storage power plant before the primary frequency regulation function is triggered and / or at the moment when the inertia response function is triggered in the previous control period;

[0038] Use the first actual active power to control the power of the wind power generation system, and use the second actual active power to control the power of the energy storage system.

[0039] In addition, to achieve the above object, the present application also proposes a power control device for a wind and storage power plant, and the power control device for the wind and storage power plant includes:

[0040] An acquisition module, configured to obtain the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind and storage power plant when it is detected that the primary frequency regulation function and / or the inertia response function of the wind and storage power plant is triggered;

[0041] A query module, configured to determine at least one adjacent wind power corresponding to the first current target power from a preset active power loss value query table, and determine at least one adjacent energy storage power corresponding to the second current target power from the preset active power loss value query table, where the preset active power loss value query table is a three-dimensional table, and the preset active power loss value query table includes the corresponding relationships between multiple preset wind powers, multiple preset energy storage powers, and multiple preset active power loss values, and one preset wind power, one preset energy storage power, and one preset active power loss value correspond to a preset working condition of the wind and storage power plant;

[0042] A determination module, configured to determine the target active power loss value of the wind and storage power plant according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power;

[0043] A correction module, configured to correct the current target total power of the wind-storage power plant by using the target active power loss value to obtain the corrected target total power;

[0044] A control module, configured to perform power control on the wind power generation system and the energy storage system by using the corrected target total power.

[0045] In addition, to achieve the above object, the present application further provides a wind-storage power plant power control device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the wind-storage power plant power control method as described above.

[0046] In addition, to achieve the above object, the present application further provides a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium, and when the computer program is executed by a processor, it implements the steps of the wind-storage power plant power control method as described above.

[0047] In addition, to achieve the above object, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the wind-storage power plant power control method as described above.

[0048] One or more technical solutions proposed by the present application have at least the following technical effects:

[0049] The present application provides a wind-storage power plant power control method, device, equipment, medium and program product. When the primary frequency regulation function and / or inertia response function of the wind-storage power plant is triggered, by determining the target active power loss value corresponding to the current working condition of the wind-storage power plant from a preset active power loss value query table, the current target total power of the wind-storage power plant is corrected, and the wind-storage power plant is power-controlled by the corrected target total power, without the need to estimate the active power loss of the wind-storage power plant in real time, avoiding inaccurate estimation of the active power loss caused by the non-linear change of the active power loss, thereby, when the primary frequency regulation function and / or inertia response function of the wind-storage power plant is triggered, the target total power of the wind-storage power plant is corrected by using the active power loss value corresponding to the actual working condition of the wind-storage power plant, and the wind-storage power plant is power-controlled, realizing the frequency regulation of the wind-storage power plant and reducing the volatility of the frequency regulation process of the wind-storage power plant. Description of the Drawings

[0050] The drawings here are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0051] To more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the related art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0052] Figure 1 It is a schematic flowchart of the first embodiment of the power control method for the wind and energy storage power plant of the present application;

[0053] Figure 2 It is a schematic block diagram of the first embodiment of the power control device for the wind and energy storage power plant of the present application;

[0054] Figure 3 It is a schematic diagram of the device structure of the hardware operating environment involved in the power control method for the wind and energy storage power plant in the embodiments of the present application.

[0055] The realization of the purpose of the present application, the functional characteristics and advantages will be further described in combination with the embodiments and with reference to the accompanying drawings. Detailed Embodiments

[0056] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0057] To better understand the technical solutions of the present application, the following will be described in detail in combination with the accompanying drawings of the specification and the specific embodiments.

[0058] With the gradual acceleration of the development pace of new energy represented by wind and light, the proportion of the total installed capacity of new energy power sources has also continued to increase. A high proportion of new energy will become the main feature of the new power system. At present, the planning and construction of centralized wind power generation have the characteristics of long distance, high voltage, and large capacity. The electric energy transmitted and connected to the grid has strong randomness, intermittency, volatility, and unpredictability, bringing non-negligible impacts and potential hazards to the large power grid, resulting in a decline in the inertia characteristics and frequency characteristics of the large power grid. Therefore, most centralized wind farms will be equipped with an inertia response system and a primary frequency modulation control system, aiming to improve the inertia characteristics and frequency characteristics of the large power grid and improve the power quality of the large power grid. Among them, the primary frequency modulation function mainly reduces the deviation of the grid frequency by controlling the power generation of the fan units, and the inertia response function reduces the deviation rate of the grid frequency by simulating the rotation characteristics of traditional generators. The two have different focuses and jointly improve the stability of the grid frequency.

[0059] However, installing an inertia response system and a primary frequency modulation control system in a wind energy storage power plant suppresses the problem of grid frequency deviation from the rated value to a certain extent, but there are still deficiencies: First, the instability and uncertainty of the wind power generation system in the wind energy storage power plant greatly reduce the frequency regulation effect, and there is almost no frequency modulation ability without wind; Second, during the inertia response and primary frequency modulation processes, the active power loss of the wind energy storage power plant changes non-linearly, and the estimated value of the active power loss is often inaccurate, resulting in large fluctuations in the frequency regulation process of the wind energy storage power plant. Therefore, how to accurately estimate the active power loss value of the wind energy storage power plant and reduce the fluctuations in the frequency regulation process of the wind energy storage power plant is an urgent problem to be solved.

[0060] The main solution of the embodiment of the present application is: when it is detected that the primary frequency modulation function and / or the inertia response function of the wind energy storage power plant is triggered, obtain the first current target power of the wind power generation system in the wind energy storage power plant and the second current target power of the energy storage system; determine at least one adjacent wind power of the first current target power from a preset active power loss value query table, and determine at least one adjacent energy storage power of the second current target power from the preset active power loss value query table, where the preset active power loss value query table is a three-dimensional table, and the preset active power loss value query table includes the corresponding relationships between multiple preset wind powers, multiple preset energy storage powers and multiple preset active power loss values, and a preset wind power, a preset energy storage power and a preset active power loss value correspond to a preset working condition of the wind energy storage power plant; determine the target active power loss value of the wind energy storage power plant according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power; use the target active power loss value to correct the current target total power of the wind energy storage power plant to obtain the corrected target total power; use the corrected target total power to control the power of the wind power generation system and the energy storage system.

[0061] Thus, the present application provides a solution. When the primary frequency modulation function and / or the inertia response function of the wind energy storage power plant is triggered, by determining the target active power loss value corresponding to the current working condition of the wind energy storage power plant from the preset active power loss value query table, the current target total power of the wind energy storage power plant is corrected, and the power of the wind energy storage power plant is controlled by the corrected target total power, without the need to estimate the active power loss of the wind energy storage power plant in real time, avoiding the inaccuracy of the estimated value of the active power loss caused by the non-linear change of the active power loss. Therefore, when the primary frequency modulation function and / or the inertia response function of the wind energy storage power plant is triggered, after correcting the target total power of the wind energy storage power plant by using the active power loss value corresponding to the actual working condition of the wind energy storage power plant, the power of the wind energy storage power plant is controlled, realizing the frequency regulation of the wind energy storage power plant and reducing the fluctuations in the frequency regulation process of the wind energy storage power plant.

[0062] Moreover, during the primary frequency regulation and / or inertia response process of this application, power control is performed on both the wind power generation system and the energy storage system in the wind-storage power plant. Thus, electrochemical energy storage is used as an auxiliary regulation means for the wind power generation system, and specific frequency regulation strategies are formulated in combination with different working conditions, greatly enhancing the frequency regulation ability of the wind-storage power plant, enabling the wind turbines in the wind power generation system to generate more electricity and the energy storage devices in the energy storage system to charge more, and reducing the losses caused by wind curtailment.

[0063] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, a wind-storage power plant power control device, etc. that can implement the above functions. Hereinafter, taking the wind-storage power plant power control device as an example, this embodiment and the following embodiments will be described.

[0064] Based on this, the embodiment of this application provides a wind-storage power plant power control method, referring to Figure 1 , Figure 1 which is a schematic flowchart of the first embodiment of the wind-storage power plant power control method of this application.

[0065] In this embodiment, the wind-storage power plant power control method may include steps S100 to S500:

[0066] Step S100, when it is detected that the primary frequency regulation function and / or inertia response function of the wind-storage power plant is triggered, obtain the first current target power of the wind power generation system in the wind-storage power plant and the second current target power of the energy storage system.

[0067] It should be noted that the wind-storage power plant may include a wind power generation system and an energy storage system, and both the wind power generation system and the energy storage system have a primary frequency regulation function and / or an inertia response function. The first current target power is the target power of the wind power generation system when the primary frequency regulation function and / or inertia response function of the wind-storage power plant is triggered within the current control period, and the second current target power is the target power of the energy storage system when the primary frequency regulation function and / or inertia response function of the wind-storage power plant is triggered within the current control period.

[0068] In a feasible implementation manner, before step S100, the wind-storage power plant frequency control method may further include: obtaining the grid connection frequency of the wind power generation system in the wind-storage power plant, comparing the grid connection frequency with the dead zone range of the primary frequency regulation function and the dead zone range of the inertia response function; if the grid connection frequency is not within the dead zone range of the primary frequency regulation function, the primary frequency regulation function of the wind-storage power plant is triggered; if the grid connection frequency is not within the dead zone range of the inertia response function, the inertia response function of the wind-storage power plant is triggered.

[0069] It should be noted that in the actual operation process of the wind-storage power plant, the real-time operation data of the wind-storage power plant can be collected in real time, including: obtaining the active power control instruction of the wind-storage power plant through the dispatching management system, obtaining electrical quantity signals such as the grid connection point voltage, current, power, and frequency of the wind-storage power plant through the measurement and control device, obtaining the current power, maximum power generation power, and minimum power generation power of the wind turbine through the wind turbine management platform, and obtaining the current power, maximum charge-discharge power, and minimum charge-discharge power of the energy storage system through the energy storage management system. Among them, the discharge power of the energy storage system is positive and the charge power is negative. Thus, by judging whether the grid connection point frequency f exceeds the primary frequency regulation dead zone range, it can be judged whether the primary frequency regulation function is triggered; by judging whether the grid connection point frequency f exceeds the inertia response dead zone range, it can be judged whether the inertia response function is triggered.

[0070] In another feasible implementation manner, step S100 may include: obtaining the primary frequency regulation power change amount and / or inertia response power change amount of the grid connection point of the wind power generation system in the wind-storage power plant; determining the superimposed power change amount according to the primary frequency regulation power change amount and / or inertia response power change amount; if the absolute value of the superimposed power change amount is less than the absolute value of the preset power change amount, then determining the total power change amount according to the primary frequency regulation power change amount and / or inertia response power change amount, and the automatic control power change amount of the wind-storage power plant; determining the current target total power of the wind-storage power plant according to the current total power and the total power change amount of the wind-storage power plant; comparing the current target total power with the first total power of the maximum power generation power of the wind power generation system and the maximum discharge power of the energy storage system, and comparing the current target total power with the second total power of the minimum power generation power of the wind power generation system and the maximum charge power; if the current target total power is greater than the first total power, then controlling the maximum power generation power as the first current target power of the wind power generation system, and taking the maximum discharge power as the second current target power of the energy storage system; if the current target total power is less than the second total power, then taking the minimum power generation power as the first current target power, and taking the maximum charge power as the second current target power; if the current target total power is less than or equal to the first total power, or the current target total power is less than or equal to the second total power, then comparing the current target total power with the third total power of the maximum power generation power and the maximum charge power; if the current target total power is greater than the third total power, then taking the maximum power generation power as the first current target power, and taking the difference between the current target total power and the maximum power generation power as the second current target power; if the current target total power is less than or equal to the third total power, then taking the maximum charge power as the first current target power, and taking the difference between the current target total power and the maximum charge power as the second current target power.

[0071] It should be noted that when the primary frequency regulation function and / or the inertia response function are triggered within the current control cycle, it is necessary to control the power of the wind storage power plant, adjust the power of the wind power generation system from the current power to the first current target power, and adjust the power of the energy storage system from the current power to the second current target power, so as to achieve frequency regulation. Among them, the total power change of the wind storage power plant is the difference between the current target total power and the current total power. In the wind storage power plant, the total power change can be determined by using the automatic control power change of the wind storage power plant, combined with the primary frequency regulation power change and / or the inertia response change.

[0072] It can be understood that if the primary frequency regulation function of the wind storage power plant is triggered, the total power change can be determined by using the automatic control power change of the wind storage power plant, combined with the primary frequency regulation power change; if the inertia response function of the wind storage power plant is triggered, the total power change can be determined by using the automatic control power change of the wind storage power plant, combined with the inertia response power change; if both the primary frequency regulation function and the inertia response function of the wind storage power plant are triggered, the total power change can be determined by using the automatic control power change of the wind storage power plant, combined with the primary frequency regulation power change and the inertia response power change.

[0073] In specific implementation, the primary frequency regulation function and the inertia response function can be calculated according to the real-time operation data of the wind storage power plant. Among them, the primary frequency regulation power change ΔP fr The calculation formula is as follows, Formula 1:

[0074]

[0075] In Formula 1, ΔP fr is the primary frequency regulation power change, is the current power of the wind power generation system, f is the grid connection point frequency of the wind power generation system, are respectively the upper limit and the lower limit corresponding to the primary frequency regulation dead zone range, f N is the rated frequency of the wind storage power plant, and δ% is the droop rate of the wind storage power plant.

[0076] The inertia response power change ΔP gl The calculation formula is as follows, Formula 2:

[0077]

[0078] In Formula 2, ΔP gl is the inertia response power change, is the current power of the wind power generation system, T J is the equivalent inertia time constant of the wind storage power plant, f N is the rated frequency of the wind storage power plant, is the frequency change rate of the wind storage power plant, and f is the grid connection point frequency of the wind power generation system, is the inertia response dead zone of the wind and energy storage power plant.

[0079] In addition, it should be noted that the preset power change amount is the system regulation dead zone of the wind and energy storage power plant. Before determining the total power change amount, it is also necessary to judge the primary frequency regulation power change amount ΔP fr and the superposition power change amount of the inertia response power change amount ΔP gl is within the system regulation dead zone ΔP dead range; if |ΔP fr +ΔP gl |<|ΔP dead |, it indicates that during the primary frequency regulation and / or inertia response regulation process, the power change amount of the wind and energy storage power plant is very small, and the grid connection point power of the current wind power generation system meets the accuracy requirements, and no frequency regulation is required; otherwise, calculate the total power change amount.

[0080] In specific implementation, the calculation of the automatic control power change amount ΔP agc is as follows in Formula 3:

[0081]

[0082] P agc is the AGC active scheduling instruction value issued by the grid competent department. The AGC (Automatic Generation Control) active scheduling instruction value refers to the active power adjustment instruction sent by the power system dispatching center to the generator set or energy storage system through the AGC system according to the real-time operation state of the power grid. This instruction value is used to adjust the output power of the generator set or energy storage system to maintain the stability of the power grid frequency and tie line power. is the current total power of the wind and energy storage power plant.

[0083] In addition, according to the principle of "superposition in the same direction, blocking in the opposite direction", the calculation of the total power change amount ΔP total is as follows in Formula 4:

[0084]

[0085] Thus, the calculation of the current target total power of the wind and energy storage power plant is as follows in Formula 5:

[0086]

[0087] It can be understood that after determining the current target total power of the wind and energy storage power plant, the first current target power of the wind power generation system and the second current target power of the energy storage system can be determined by combining the maximum power generation power and minimum power generation power of the wind power generation system, as well as the maximum charge and discharge power and minimum charge and discharge power of the energy storage system.

[0088] In specific implementation, if It indicates the current target total power P tar exceeds the power upper limit of the wind-storage power plant, so the first current target power of the wind power generation system is set to the maximum power generation The second current target power of the energy storage system is set to the maximum discharge power That is:

[0089] If it indicates that the current target total power P tar is lower than the power lower limit of the wind-storage power plant, so the first current target power of the wind power generation system is set to the minimum power generation The second current target power of the energy storage system is set to the maximum charging power That is:

[0090] If the current target total power P tar is within the power limit range of the total wind-storage power plant, then according to the principle of "the wind turbines generate as much power as possible and the energy storage system charges as much as possible", further judge the relationship between P tar and There is a relationship between them

[0091] If the wind turbines of the wind power generation system operate at the maximum power generation. If the power exceeds, the energy storage system charges to absorb it; if the power is insufficient, the energy storage system discharges to supplement it. At this time, the first

[0092]

[0093] The current target power and the second current target power are calculated as follows in Formula Six:

[0094] Otherwise, the energy storage system operates at the maximum charging power. If the power is insufficient, the wind power generation system generates power to supplement it. At this time, the first current target power and the second current target power are calculated as follows in Formula Seven:

[0095]

[0096] Step S200, determine at least one adjacent wind power of the first current target power from the preset active power loss value query table, and determine at least one adjacent energy storage power of the second current target power from the preset active power loss value query table

[0097] Among them, the preset active power loss lookup table is a three-dimensional table, which includes the corresponding relationships among multiple preset wind power generations, multiple preset energy storage powers, and multiple preset active power losses. One preset wind power generation, one preset energy storage power, and one preset active power loss correspond to a preset working condition of the wind-storage power station.

[0098] It should be noted that the preset active power loss lookup table has pre-set the power of the wind power generation system, the charge and discharge power of the energy storage system, and the corresponding active power losses under different preset working conditions.

[0099] In specific implementation, the installed capacity of the wind power generation system in the wind-storage power station is equally discretized into R points, and the discrete power sequence of the corresponding wind power generation system is where is the maximum power generation of the wind power generation system.

[0100] The installed capacity of the energy storage system in the wind-storage power station is equally discretized into S points, and the discrete power sequence of the corresponding energy storage system is where is the maximum charging power of the energy storage station (energy storage charging is negative), is the maximum discharging power of the energy storage station (energy storage discharging is positive).

[0101] The following Table 1 is an exemplary preset active power loss lookup table. In the preset active power loss lookup table, the horizontal header is the discrete power of the wind power generation system, the vertical header is the discrete power of the energy storage system, and the table value is the preset active power loss under the preset working condition corresponding to the combination of the horizontal header and the vertical header. Among them, the calculation method of the active power loss is: respectively select a discrete power of the wind power generation system and the energy storage system as their target power commands and send them to the fan management system and the energy storage management system. For example and After the wind power generation system and the energy storage system are adjusted to be stable, check the active power of the connection point of the wind power generation system and the corresponding energy storage system Then the active power loss under this preset working condition can be obtained as and the preset active power loss corresponding to the intersection position in the table. Similarly, the preset active power losses under other preset working conditions can be calculated.

[0102] Table 1:

[0103]

[0104] It can be understood that the adjacent wind power is the preset wind power whose power value in the preset active power loss value query table is relatively close to the power value of the first current target power, and the adjacent energy storage power is the preset energy storage power whose power value in the preset active power loss value query table is relatively close to the power value of the second current target power.

[0105] In one example, for any set of power combinations under preset working conditions That is, the first current target power is The second current target power is If Between And Among them, Between And Among them, then And Are both The adjacent wind power of, And Are both The adjacent energy storage power of; if Then If Then If Then If Then

[0106] Step S300, determine the target active power loss value of the wind - storage power station according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power.

[0107] It should be noted that the number of adjacent wind power and adjacent energy storage power can be one or two. When the number of both adjacent wind power and adjacent energy storage power is one, the target active power loss value is the preset active power loss value corresponding to this group of adjacent wind power and adjacent energy storage power; when the number of both adjacent wind power and adjacent energy storage power is two, four preset active power loss values corresponding to four preset working conditions can be determined from the preset active power loss value query table, and then the target active power loss value needs to be determined according to the four preset active power loss values corresponding to the four preset working conditions.

[0108] In a feasible implementation manner, the adjacent wind power includes a first preset wind power and a second preset wind power, the adjacent energy storage power includes a first preset energy storage power and a second preset energy storage power, the first preset wind power and the first preset energy storage power correspond to a first preset working condition, the first preset wind power and the second preset energy storage power correspond to a second preset working condition, the second preset wind power and the first preset energy storage power correspond to a third preset working condition, and the second preset wind power and the second preset energy storage power correspond to a fourth preset working condition;

[0109] Correspondingly, step S300 may include: determining from the preset active power loss value query table a first loss difference between the first preset active power loss value under the first preset operating condition and the second preset active power loss value under the second preset operating condition, a second loss difference between the first preset active power loss value and the third preset active power loss value under the third preset operating condition, a third loss difference between the third preset active power loss value and the fourth preset active power loss value under the fourth preset operating condition, and determining a fourth loss difference between the second preset active power loss value and the fourth preset active power loss value; obtaining a first difference between the first loss difference and the third loss difference, and a second difference between the second loss difference and the fourth loss difference; and taking the arithmetic mean of the first difference and the second difference as the target active power loss value of the wind storage farm.

[0110] Power combination under preset working conditions For example, in Table 1, if Between and between, Between and The first preset active power loss value is The second preset active power loss value is The third preset active power loss value is The fourth preset active power loss value is Calculate separately and and and and The linear difference between the two can be used to obtain the first loss difference Second loss difference The third loss difference and the fourth loss difference Calculate separately and and The linear difference between the two can be used to obtain the first difference and second Then, take and The arithmetic mean of is taken as the target active power loss value of the wind storage power farm. That is, the target active power loss value of the wind storage power farm is calculated as follows:

[0111]

[0112] In another feasible implementation manner, the adjacent wind power includes a third preset wind power, and the adjacent energy storage power includes a third preset energy storage power;

[0113] Correspondingly, step S300 may include: using the preset active power loss value corresponding to the third preset wind power and the third preset energy storage power in the preset active power loss value query table as the target active power loss value of the wind energy storage power plant.

[0114] Continuing with the power combination under the preset working conditions as an example, in Table 1, if then If then The corresponding target active power loss value is the power combination of the preset working conditions corresponding preset active power loss value.

[0115] Step S400, using the target active power loss value to correct the current target total power of the wind energy storage power plant to obtain the corrected target total power.

[0116] It should be noted that the current target total power P tar = the first current target power + the second current target power. Taking as the power combination of the second current target power and the first current target power under a certain working condition, according to the above-mentioned active power loss estimation method of the present application, the target active power loss value P loss can be calculated and obtained, and the current target total power P tar is corrected, that is, the corrected target total power = P tar + P loss .

[0117] Step S500, using the corrected target total power to perform power control on the wind power generation system and the energy storage system.

[0118] It should be noted that by using the calculation methods of the first current target power and the second current target power in step S100, comparing the corrected target total power with the maximum power generation the minimum power generation of the fan the maximum discharge power of the energy storage the maximum charge power of the energy storage the relationship between them, the target power of the wind power generation system and the target power of the energy storage system corresponding to the corrected target total power can be determined. Then, through the control system of the wind energy storage power plant, according to the communication protocol type and message format, the target power of the wind power generation system and the target power of the energy storage system corresponding to the corrected target total power are converted into specific control instructions and sent to the fan management platform and the energy storage EMS system, and the power regulation of the wind energy storage power plant can be realized.

[0119] In an alternative embodiment, the power control method for the wind-storage power plant may further include: when the primary frequency regulation function of the wind-storage power plant is not detected to be triggered and the inertia response function of the wind-storage power plant is not detected to be triggered, determining whether the primary frequency regulation function and / or the inertia response function of the wind-storage power plant is triggered in the previous control period before the current control period; if the primary frequency regulation function is triggered in the previous control period and / or the inertia response function is triggered in the previous control period, obtaining the first actual active power of the wind power generation system and the second actual active power of the energy storage system in the wind-storage power plant before the primary frequency regulation function is triggered and / or at the moment when the inertia response function is triggered in the previous control period; using the first actual active power to control the power of the wind power generation system and / or using the second actual active power to control the power of the energy storage system.

[0120] It should be noted that when the primary frequency regulation function of the wind-storage power plant is not detected to be triggered and the inertia response function of the wind-storage power plant is not detected to be triggered, if it is determined that the primary frequency regulation function and / or the inertia response function is triggered in the previous control period before the current control period, it indicates that the current control period is a process of frequency recovery and normal pullback. Obtain the first actual active power of the wind power generation system and / or the second actual active power of the energy storage system before the primary frequency regulation function is triggered and / or at the moment when the inertia response function is triggered in the previous control period, and send them to the fan management platform and the energy storage EMS system to control the wind-storage power plant to restore the operating state before the frequency anomaly.

[0121] Therefore, this embodiment provides a power control method for a wind-storage power plant. When the primary frequency regulation function and / or the inertia response function of the wind-storage power plant is triggered, by determining the target active power loss value corresponding to the current working condition of the wind-storage power plant from the preset active power loss value query table, correcting the current target total power of the wind-storage power plant, and controlling the power of the wind-storage power plant through the corrected target total power, there is no need to estimate the active power loss of the wind-storage power plant in real time, avoiding inaccurate active power loss estimation caused by the non-linear change of the active power loss. Thus, when the primary frequency regulation function and / or the inertia response function of the wind-storage power plant is triggered, using the active power loss value corresponding to the actual working condition of the wind-storage power plant to correct the target total power of the wind-storage power plant, and then controlling the power of the wind-storage power plant, realizing the frequency regulation of the wind-storage power plant and reducing the volatility of the frequency regulation process of the wind-storage power plant.

[0122] Moreover, during the primary frequency regulation and / or inertia response process in this embodiment, power control is performed on both the wind power generation system and the energy storage system in the wind-storage power plant. Thus, the electrochemical energy storage is used as an auxiliary regulation means for the wind power generation system, and specific frequency regulation strategies are formulated in combination with different working conditions, greatly enhancing the frequency regulation ability of the wind-storage power plant, enabling the wind turbines in the wind power generation system to generate more electricity and the energy storage devices in the energy storage system to charge more, and reducing the losses caused by wind curtailment.

[0123] This application also provides a power control device for a wind-storage power plant, as Figure 2 shown. The power control device for the wind-storage power plant may include:

[0124] An acquisition module 10, configured to acquire the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind-storage power plant when it is detected that the primary frequency regulation function and / or inertia response function of the wind-storage power plant is triggered;

[0125] A query module 20, configured to determine at least one adjacent wind power corresponding to the first current target power and at least one adjacent energy storage power corresponding to the second current target power from a preset active power loss value query table, where the preset active power loss value query table is a three-dimensional table, and the corresponding relationship between multiple preset wind powers, multiple preset energy storage powers, and multiple preset active power loss values is included in the preset active power loss value query table, and one preset wind power, one preset energy storage power, and one preset active power loss value correspond to a preset working condition of the wind-storage power plant;

[0126] A determination module 30, configured to determine the target active power loss value of the wind-storage power plant according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power;

[0127] A correction module 40, configured to correct the current target total power of the wind-storage power plant by using the target active power loss value to obtain the corrected target total power;

[0128] A control module 50, configured to perform power control on the wind power generation system and the energy storage system by using the corrected target total power.

[0129] The power control device for the wind-storage power plant provided by this application adopts the wind-storage power plant power control method in the above embodiment, and can solve the technical problem of how to accurately estimate the active power loss value of the wind-storage power plant and reduce the volatility in the frequency regulation process of the wind-storage power plant. Compared with the related technology, the beneficial effects of the power control device for the wind-storage power plant provided by this application are the same as those of the wind-storage power plant power control method provided by the above embodiment, and other technical features in the power control device for the wind-storage power plant are the same as the features disclosed in the method of the above embodiment, and will not be elaborated here.

[0130] The present application provides a power control device for a wind and energy storage power plant. The power control device for a wind and energy storage power plant includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the power control method for a wind and energy storage power plant in Embodiment 1 above.

[0131] Reference is made below Figure 3 to FIG., which shows a schematic structural diagram of a power control device for a wind and energy storage power plant suitable for implementing the embodiments of the present application. The power control device for a wind and energy storage power plant in the embodiments of the present application may include, but is not limited to, mobile terminals such as controllers, laptop computers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), and fixed terminals such as desktop computers. Figure 3 The power control device for a wind and energy storage power plant shown is merely an example and should not impose any limitation on the functions and scope of use of the embodiments of the present application.

[0132] As Figure 3 shown, the power control device for a wind and energy storage power plant may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which may perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM: Random Access Memory) 1004. In the RAM 1004, various programs and data required for the operation of the power control device for a wind and energy storage power plant are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems may be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 may allow the power control device for a wind and energy storage power plant to communicate with other devices wirelessly or wiredly to exchange data. Although the figure shows a power control device for a wind and energy storage power plant having various systems, it should be understood that it is not required to implement or include all the systems shown. More or fewer systems may be implemented or included alternatively.

[0133] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product that includes a computer program carried on a computer-readable medium, and the computer program contains program codes for executing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by a processing device 1001, the above-mentioned functions defined in the methods of the embodiments disclosed in the present application are executed.

[0134] The wind-storage power control device provided by the present application adopts the wind-storage power control method in the above-mentioned embodiment, and can solve the technical problems of how to accurately estimate the active power loss value of the wind-storage power plant and reduce the volatility in the frequency regulation process of the wind-storage power plant. Compared with the related technologies, the beneficial effects of the wind-storage power control device provided by the present application are the same as those of the wind-storage power control method provided by the above-mentioned embodiment, and other technical features in the wind-storage power control device are the same as the features disclosed in the method of the previous embodiment, and will not be elaborated here.

[0135] It should be understood that each part disclosed in the present application can be implemented by hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0136] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0137] The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the wind-storage power control method in the above-mentioned embodiment.

[0138] The computer-readable storage medium provided by the present application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or flash memory, optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program, which can be used by or in conjunction with an instruction execution system, device, or component. The program code contained on the computer-readable storage medium can be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0139] The above computer-readable storage medium can be included in the wind storage power control device; or it can exist independently without being assembled into the wind storage power control device.

[0140] The above computer-readable storage medium carries one or more programs. When the one or more programs are executed by the wind storage power control device, the wind storage power control device is caused to: when it is detected that the primary frequency regulation function and / or inertia response function of the wind storage power plant is triggered, obtain the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind storage power plant; determine at least one adjacent wind power corresponding to the first current target power from a preset active power loss value lookup table, and determine at least one adjacent energy storage power corresponding to the second current target power from the preset active power loss value lookup table, where the preset active power loss value lookup table is a three-dimensional table, and the preset active power loss value lookup table includes the corresponding relationships between multiple preset wind powers, multiple preset energy storage powers, and multiple preset active power loss values, and one preset wind power, one preset energy storage power, and one preset active power loss value correspond to a preset operating condition of the wind storage power plant; determine the target active power loss value of the wind storage power plant according to at least one preset active power loss value corresponding to each adjacent wind power and the corresponding adjacent energy storage power; correct the current target total power of the wind storage power plant using the target active power loss value to obtain the corrected target total power; and perform power control on the wind power generation system and the energy storage system using the corrected target total power.

[0141] Computer program code for performing the operations of this application can be written in one or more programming languages or combinations thereof. The above-mentioned programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, by connecting through the Internet using an Internet service provider).

[0142] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of the code, and this module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutively represented blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0143] The modules described in the embodiments of this application can be implemented in software or in hardware. Among them, the name of the module does not constitute a limitation to the unit itself in some cases.

[0144] The readable storage medium provided in this application is a computer-readable storage medium. The computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for performing the above-mentioned wind storage power control method, and can solve the technical problems of how to accurately estimate the active power loss value of the wind storage power plant and reduce the volatility of the frequency regulation process of the wind storage power plant. Compared with the related technologies, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the wind storage power control method provided in the above embodiments, and will not be elaborated here.

[0145] The present application also provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the wind-storage power plant power control method as described above are implemented.

[0146] The computer program product provided by the present application can solve the technical problems of how to accurately estimate the active power loss value of the wind-storage power plant and reduce the volatility in the frequency regulation process of the wind-storage power plant. Compared with the related art, the beneficial effects of the computer program product provided by the present application are the same as those of the wind-storage power plant power control method provided by the above embodiments, and will not be elaborated here.

[0147] The above are only partial embodiments of the present application, and thus do not limit the protection scope. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields is included in the protection scope.

Claims

1. A power control method for a wind and energy storage power plant, characterized in that The power control method for the wind and energy storage power plant includes: When it is detected that the primary frequency regulation function and / or the inertia response function of the wind and energy storage power plant is triggered, obtain the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind and energy storage power plant; Determine at least one adjacent wind power corresponding to the first current target power and at least one adjacent energy storage power corresponding to the second current target power from a preset active power loss value lookup table, where the preset active power loss value lookup table is a three-dimensional table, and the preset active power loss value lookup table includes the corresponding relationships between multiple preset wind powers, multiple preset energy storage powers, and multiple preset active power loss values. One preset wind power, one preset energy storage power, and one preset active power loss value correspond to a preset working condition of the wind and energy storage power plant; Determine the target active power loss value of the wind and energy storage power plant according to at least one of the preset active power loss values corresponding to each of the adjacent wind powers and the corresponding adjacent energy storage powers; Use the target active power loss value to correct the current target total power of the wind and energy storage power plant to obtain the corrected target total power; Use the corrected target total power to perform power control on the wind power generation system and the energy storage system.

2. The power control method for a wind and energy storage power plant according to claim 1, wherein The adjacent wind powers include a first preset wind power and a second preset wind power, the adjacent energy storage powers include a first preset energy storage power and a second preset energy storage power. The first preset wind power and the first preset energy storage power correspond to a first preset working condition, the first preset wind power and the second preset energy storage power correspond to a second preset working condition, the second preset wind power and the first preset energy storage power correspond to a third preset working condition, and the second preset wind power and the second preset energy storage power correspond to a fourth preset working condition; The step of determining the target active power loss value of the wind and energy storage power plant according to at least one of the preset active power loss values corresponding to each of the adjacent wind powers and the corresponding adjacent energy storage powers includes: Determine a first loss difference between a first preset active power loss value in the first preset working condition and a second preset active power loss value in the second preset working condition, a second loss difference between the first preset active power loss value and a third preset active power loss value in the third preset working condition, a third loss difference between the third preset active power loss value and a fourth preset active power loss value in the fourth preset working condition from the preset active power loss value lookup table, and determine a fourth loss difference between the second preset active power loss value and the fourth preset active power loss value; Obtain a first difference between the first loss difference and the third loss difference, and a second difference between the second loss difference and the fourth loss difference; Take the arithmetic mean of the first difference and the second difference as the target active power loss value of the wind and energy storage power plant.

3. The power control method for a wind and energy storage power plant according to claim 1, characterized in that, The adjacent wind powers include a third preset wind power, and the adjacent energy storage powers include a third preset energy storage power; The step of determining the target active power loss value of the wind-storage power plant according to at least one of the preset active power loss values corresponding to the adjacent wind power and the corresponding adjacent energy storage power includes: Taking the preset active power loss value corresponding to the third preset wind power and the third preset energy storage power in the preset active power loss value lookup table as the target active power loss value of the wind-storage power plant.

4. The power control method for a wind and energy storage power plant according to claim 1, wherein, The step of obtaining the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind-storage power plant includes: Obtaining the primary frequency regulation power change amount and / or the inertia response power change amount of the connection point of the wind power generation system in the wind-storage power plant; Determining the superimposed power change amount according to the primary frequency regulation power change amount and / or the inertia response power change amount; If the absolute value of the superimposed power change amount is less than the absolute value of the preset power change amount, determining the total power change amount according to the primary frequency regulation power change amount and / or the inertia response power change amount, and the automatic control power change amount of the wind-storage power plant; Determining the current target total power of the wind-storage power plant according to the current total power of the wind-storage power plant and the total power change amount; Comparing the current target total power with the first total power of the maximum power generation of the wind power generation system and the maximum discharge power of the energy storage system, and comparing the current target total power with the second total power of the minimum power generation and the maximum charging power of the wind power generation system If the current target total power is greater than the first total power, controlling the maximum power generation as the first current target power of the wind power generation system, and taking the maximum discharge power as the second current target power of the energy storage system; If the current target total power is less than the second total power, taking the minimum power generation as the first current target power, and taking the maximum charging power as the second current target power; If the current target total power is less than or equal to the first total power, or the current target total power is less than or equal to the second total power, comparing the current target total power with the third total power of the maximum power generation and the maximum charging power; If the current target total power is greater than the third total power, taking the maximum power generation as the first current target power, and taking the difference between the current target total power and the maximum power generation as the second current target power; If the current target total power is less than or equal to the third total power, taking the maximum charging power as the first current target power, and taking the difference between the current target total power and the maximum charging power as the second current target power.

5. The power control method for a wind and energy storage power plant according to claim 1, characterized in that Before the step of obtaining the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind-storage power plant, the wind-storage power plant power control method further includes: Obtaining the grid connection point frequency of the wind power generation system in the wind-storage power plant; Comparing the grid connection point frequency with the dead zone range of the primary frequency regulation function and the dead zone range of the inertia response function; If the grid connection point frequency is not within the dead band of the primary frequency regulation function, the primary frequency regulation function of the wind and energy storage power plant is triggered; If the grid connection point frequency is not within the dead band of the inertia response function, the inertia response function of the wind and energy storage power plant is triggered.

6. The power control method for a wind and energy storage power plant according to claim 1, wherein The power control method of the wind and energy storage power plant further includes: In the case where the primary frequency regulation function of the wind and energy storage power plant is not detected to be triggered and the inertia response function of the wind and energy storage power plant is not detected to be triggered, it is judged whether the primary frequency regulation function and / or the inertia response function of the wind and energy storage power plant is triggered in the previous control period before the current control period; If the primary frequency regulation function is triggered in the previous control period and / or the inertia response function is triggered in the previous control period, the first actual active power of the wind power generation system and the second actual active power of the energy storage system in the wind and energy storage power plant are obtained before the primary frequency regulation function is triggered and / or at the moment when the inertia response function is triggered in the previous control period; The power of the wind power generation system is controlled by using the first actual active power, and the power of the energy storage system is controlled by using the second actual active power.

7. A power control device for a wind and energy storage power plant, characterized in that, The power control device of the wind and energy storage power plant includes: An acquisition module, configured to acquire the first current target power of the wind power generation system and the second current target power of the energy storage system in the wind and energy storage power plant when the primary frequency regulation function and / or the inertia response function of the wind and energy storage power plant is detected to be triggered; A query module, configured to determine at least one adjacent wind power corresponding to the first current target power and at least one adjacent energy storage power corresponding to the second current target power from a preset active power loss value query table, wherein the preset active power loss value query table is a three-dimensional table, and the preset active power loss value query table includes the corresponding relationships between multiple preset wind powers, multiple preset energy storage powers and multiple preset active power loss values. A preset wind power, a preset energy storage power and a preset active power loss value correspond to a preset working condition of the wind and energy storage power plant; A determination module, configured to determine the target active power loss value of the wind and energy storage power plant according to at least one of the preset active power loss values corresponding to each of the adjacent wind powers and the corresponding adjacent energy storage powers; A correction module, configured to correct the current target total power of the wind and energy storage power plant by using the target active power loss value to obtain a corrected target total power; A control module, configured to control the power of the wind power generation system and the energy storage system by using the corrected target total power.

8. A wind farm power control device, characterized in that: The power control device of the wind and energy storage power plant includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the power control method of the wind and energy storage power plant according to any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the power control method of the wind and energy storage power plant according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that, The computer program product includes a computer program which, when executed by a processor, implements the steps of the wind and energy storage power control method according to any one of claims 1 to 6.

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