A control method, device, system and storage medium for a wind-storage hybrid network

Abstract

The present application discloses a control method, device, system and storage medium for a wind-storage hybrid grid, which is used to improve the reliability and energy utilization efficiency of a new energy power generation system under weak grid conditions or isolated grids. The method includes: obtaining the working status of a grid-type energy storage in a new energy system, wherein the new energy system at least includes a grid-type energy storage and a wind turbine; when the grid-type energy storage is in a normal working state, controlling the grid-type energy storage to work in a grid-type mode, wherein the grid-type energy storage balances the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves; controlling the grid-type wind turbine to work in a grid-following mode, wherein the wind turbine performs load following while the grid-type energy storage balances the supply and demand fluctuations of the new energy system. This solution improves the reliability and energy utilization efficiency of the new energy system.

Description

Technical Field

[0001] The present application relates to the technical field of operation control of new energy power generation systems, and in particular to a control method, device, system and storage medium for a wind-storage hybrid network. Background Art

[0002] A new energy system refers to an electric power system primarily based on renewable energy (such as photovoltaics and wind power) and integrated with technologies such as energy storage. Grid-connected technologies provide active voltage and frequency support for new energy systems and are a crucial component of these new power systems. As new energy systems develop, grid-connected equipment must reserve more energy reserves to meet system demands. While grid-connected converters are currently used in 100% renewable energy microgrids or isolated grid systems, they primarily utilize grid-connected energy storage solutions. In systems with a single energy storage grid source, the system is highly dependent on energy storage. A failure in the energy storage can severely impact the reliability of the entire system. Furthermore, given the dual-high energy requirements of the new power system, grid-connected new energy stations must reserve sufficient energy reserves. However, excessive reserves can lead to low energy utilization efficiency and poor economic efficiency, while insufficient reserves can impair the system's ability to withstand disturbances.

[0003] Therefore, how to provide a control method for wind-storage hybrid network to improve the reliability and energy utilization efficiency of new energy systems has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The present application provides a control method, device, system and storage medium for a wind-storage hybrid network to improve the reliability and energy utilization efficiency of a new energy system.

[0005] The present application provides a control method for a wind-storage hybrid network, comprising:

[0006] Acquiring a working status of a grid-type energy storage in a new energy system, wherein the new energy system includes at least a grid-type energy storage and a wind turbine group;

[0007] When the grid-type energy storage is in a normal working state, controlling the grid-type energy storage to operate in a grid-type mode, wherein when the grid-type energy storage operates in the grid-type mode, the grid-type energy storage balances the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves;

[0008] The grid-type wind turbine group is controlled to operate in a grid-following mode. While the grid-type energy storage balances the supply and demand fluctuations of the new energy system, the grid-type wind turbine group performs load following.

[0009] The beneficial effects of the present application are: when the grid-type energy storage is working normally, the grid-type energy storage is controlled to work in the grid-type mode and the grid-type wind turbine unit works in the grid-following mode, thereby avoiding the system's high dependence on energy storage and improving the reliability of the new energy system; and, the grid-type energy storage balances the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves, and the grid-type wind turbine unit performs load following, so that the grid-type energy storage and the grid-type wind turbine unit find a better balance between energy reservation and participation in system load regulation, avoiding energy waste caused by excessive energy reservation and improving the energy utilization efficiency of the equipment. In summary, the present application achieves the dual goals of strong grid support and efficient energy utilization through load regulation optimization on the basis of ensuring that the system voltage and frequency can be supported, thereby improving the reliability and energy utilization efficiency of the new energy system.

[0010] In one embodiment, the method further comprises:

[0011] When a disturbance occurs in the system, the grid-type energy storage provides instant support to compensate for the system disturbance;

[0012] In the case that the instantaneous support provided by the grid-type energy storage cannot completely eliminate the system disturbance, the grid-type energy storage and the wind turbine group enter into a primary frequency modulation to further eliminate the system disturbance.

[0013] In one embodiment, the strategy of the grid-type energy storage to balance the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves is as follows:

[0014] When P Ga +P Fa -P L >ξ1, (ξ1>0), the grid-type energy storage is charged, wherein the charging power satisfies the following conditions:

[0015] |P E |<P Ga +P Fa -P L ,|P E |≤maximum charging power-kPn;

[0016] When P Ga +P Fa -P L <ξ2, (ξ1>ξ2>0), the grid-type energy storage is discharged, wherein the discharge power satisfies the following conditions:

[0017] |P E |≤P L ,|P E |<maximum discharge power-kPn;

[0018] Among them, P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; ξ1 and ξ2 are the preset power margins; Pn is the maximum capacity of the system; and k is the reserved energy coefficient.

[0019] In one embodiment, the load following strategy of the wind turbine group is as follows:

[0020] Obtain the power of grid-type energy storage and load power based on the system power balance relationship;

[0021] Calculating the target power value of the wind turbine group according to the power of the grid-type energy storage and the load power;

[0022] The wind turbine group is controlled to perform load following according to the power target value.

[0023] In one embodiment, the wind turbine group includes a grid-type wind turbine group and a grid-following wind turbine group, and the method further includes:

[0024] When an abnormality occurs in the grid-type energy storage, the grid-type wind turbine group is controlled to switch to the grid-type mode. After the grid-type wind turbine group switches to the grid-type mode, the grid-type wind turbine group participates in the load support of a preset proportion on the basis of ensuring energy reserves, and the remaining load support is balanced by the grid-following wind turbine group.

[0025] The beneficial effect of this embodiment is that when the grid-type energy storage is abnormal, the grid can be built through the grid-type wind turbine group, so that the grid-building equipment can be flexibly adjusted according to the operating status of the grid, avoiding the situation where the grid system is paralyzed due to the abnormality of the grid-type energy storage and increasing robustness.

[0026] In one embodiment, the method further comprises:

[0027] When the abnormality of the grid-type energy storage occurs because the charge of the grid-type energy storage exceeds a normal range, the grid-type energy storage is controlled to recover the charge.

[0028] In one embodiment, the strategy for controlling the grid-type energy storage to perform charge recovery is as follows:

[0029] When the charge is lower than a first preset value, the grid-type energy storage is charged. The first preset value is the minimum value of the normal charge range of the grid-type energy storage. The charging power of the grid-type energy storage meets the following conditions:

[0030] |PE|<P Ga +P Fa -P L -kPn, |PE|≤maximum charging power;

[0031] When the charge is higher than a second preset threshold, the energy storage is discharged. The second preset value is the maximum value of the normal charge range of the grid-type energy storage. The discharge power of the grid-type energy storage meets the following conditions:

[0032] |PE|≤PL, |PE|<maximum discharge power;

[0033] Among them, the P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0034] The present application also provides a control device for a wind-storage hybrid network, comprising:

[0035] An acquisition module, configured to acquire a working status of a grid-type energy storage in a new energy system, wherein the new energy system includes at least a grid-type energy storage and a wind turbine group;

[0036] a first control module, configured to control the grid-forming energy storage to operate in a grid-forming mode when the grid-forming energy storage is in a normal working state, wherein when the grid-forming energy storage operates in the grid-forming mode, the grid-forming energy storage balances supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves;

[0037] The second control module is used to control the grid-type wind turbine group to operate in a grid-following mode. While the grid-type energy storage balances the supply and demand fluctuations of the new energy system, the grid-type wind turbine group performs load following.

[0038] In one embodiment, the apparatus further comprises:

[0039] A support module is used to provide instantaneous support through the grid-type energy storage when a disturbance occurs in the system to compensate for the system disturbance;

[0040] The frequency regulation module is used to enter into a primary frequency regulation through the grid-type energy storage and the wind turbine group to further eliminate the system disturbance when the instantaneous support provided by the grid-type energy storage cannot completely eliminate the system disturbance.

[0041] In one embodiment, the strategy of the grid-type energy storage to balance the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves is as follows:

[0042] When P Ga +P Fa -P L>ξ1, (ξ1>0), the grid-type energy storage is charged, wherein the charging power satisfies the following conditions:

[0043] |P E |<P Ga +P Fa -P L ,|P E |≤maximum charging power-kPn;

[0044] When P Ga +P Fa -P L <ξ2, (ξ1>ξ2>0), the grid-type energy storage is discharged, wherein the discharge power satisfies the following conditions:

[0045] |P E |≤P L ,|P E |<maximum discharge power-kPn;

[0046] Among them, P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; ξ1 and ξ2 are the preset power margins; Pn is the maximum capacity of the system; and k is the reserved energy coefficient.

[0047] In one embodiment, the load following strategy of the wind turbine group is as follows:

[0048] Obtain the power of grid-type energy storage and load power based on the system power balance relationship;

[0049] Calculating the target power value of the wind turbine group according to the power of the grid-type energy storage and the load power;

[0050] The wind turbine group is controlled to perform load following according to the power target value.

[0051] In one embodiment, the apparatus further comprises:

[0052] The switching module is used to control the grid-type wind turbine group to switch to the grid-type mode when an abnormality occurs in the grid-type energy storage. After the grid-type wind turbine group switches to the grid-type mode, the grid-type wind turbine group participates in the load support of a preset proportion on the basis of ensuring energy reserves, and the remaining load support is balanced by the grid-following wind turbine group.

[0053] In one embodiment, the apparatus further comprises:

[0054] The recovery module is used to control the grid-type energy storage to perform charge recovery when the abnormality of the grid-type energy storage occurs because the charge of the grid-type energy storage exceeds the normal range.

[0055] In one embodiment, the strategy for controlling the grid-type energy storage to perform charge recovery is as follows:

[0056] When the charge is lower than a first preset value, the grid-type energy storage is charged. The first preset value is the minimum value of the normal charge range of the grid-type energy storage. The charging power of the grid-type energy storage meets the following conditions:

[0057] |P E |<P Ga +P Fa -P L -kPn,|P E |≤maximum charging power;

[0058] When the charge is higher than a second preset threshold, the energy storage is discharged. The second preset value is the maximum value of the normal charge range of the grid-type energy storage. The discharge power of the grid-type energy storage meets the following conditions:

[0059] |P E |≤PL,|P E |<maximum discharge power;

[0060] Among them, the P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0061] The present application also provides a control system for a wind-storage hybrid network, comprising:

[0062] at least one processor; and,

[0063] a memory communicatively connected to the at least one processor; wherein,

[0064] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to implement the control method of the wind-storage hybrid network recorded in any of the above embodiments.

[0065] The present application also provides a computer-readable storage medium. When the instructions in the storage medium are executed by the processor corresponding to the control system of the wind-storage hybrid network, the control system of the wind-storage hybrid network can implement the control method of the wind-storage hybrid network recorded in any of the above embodiments.

[0066] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0067] The technical solution of the present application is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0069] Figure 1 This is a flow chart of a control method for a wind-storage hybrid network in one embodiment of the present application;

[0070] Figure 2 This is a system operation diagram of the grid-type energy storage in a normal state in one embodiment of the present application;

[0071] Figure 3 This is a flow chart of system energy management of grid-type energy storage in grid-type mode in one embodiment of the present application;

[0072] Figure 4 This is a system operation diagram of a grid-type energy storage system in an abnormal state in one embodiment of the present application;

[0073] Figure 5 This is a flow chart of system energy management of a grid-type wind turbine group in a grid-type mode in one embodiment of the present application;

[0074] Figure 6 This is a flow chart of a strategy for load following of a wind turbine group in a grid-forming mode in accordance with an embodiment of the present application;

[0075] Figure 7 A flow chart of a strategy for load regulation of a grid-type wind turbine group in a grid-type mode in one embodiment of the present application;

[0076] Figure 8 This is a structural diagram of a control device for a wind-storage hybrid network in one embodiment of the present application;

[0077] Figure 9 This is a schematic diagram of the hardware structure of a control system for a wind-storage hybrid network in one embodiment of the present application. DETAILED DESCRIPTION

[0078] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0079] To address the shortcomings of existing technologies, this paper proposes a wind-storage hybrid grid-connected complementary energy management strategy. By diversifying and expanding grid-connected energy sources, strengthening system reserve reserves, and flexibly adjusting grid-connected equipment according to grid operating conditions, the present invention increases robustness. The control method of this paper mainly switches and coordinates around two basic operating modes:

[0080] (1) Energy storage network mode:

[0081] When the grid-connected energy storage is operating normally, it is controlled to operate in grid-connected mode. In this mode, the grid-connected energy storage serves as the primary voltage and frequency source, responsible for actively balancing supply and demand fluctuations in the new energy system while meeting its own energy reserves (such as maintaining the SOC within a safe range).

[0082] At the same time, the grid-connected wind turbines are controlled to operate in grid-following mode. In this mode, the grid-connected wind turbines follow the grid frequency and voltage established by the grid-connected energy storage, and output power based on system demand or dispatch instructions. Their primary task is to perform load following, working with the grid-connected energy storage to meet system power requirements.

[0083] (2) Wind turbine network mode:

[0084] When an abnormal state of the grid-forming energy storage is detected, the control method will trigger a mode switch to ensure the continuous and stable operation of the system. At this time, the grid-forming wind turbine group is controlled to switch from the grid-following mode to the grid-forming mode.

[0085] In this mode, grid-connected wind turbines take over from energy storage to assume primary responsibility for voltage and frequency support, ensuring basic system operation. Meanwhile, appropriate recovery measures are implemented for abnormal grid-connected energy storage.

[0086] Figure 1 This is a flow chart of a control method for a wind-storage hybrid network in one embodiment of the present application. Figure 1 As shown, the method can be implemented as the following steps S101-S103:

[0087] In step S101, the working status of the grid-type energy storage in the new energy system is obtained, wherein the new energy system at least includes the grid-type energy storage and the wind turbine group;

[0088] In step S102, when the grid-type energy storage is in a normal working state, the grid-type energy storage is controlled to operate in a grid-type mode, wherein when the grid-type energy storage operates in the grid-type mode, the grid-type energy storage balances the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves;

[0089] In step S103, the grid-type wind turbine group is controlled to operate in a grid-following mode. While the grid-type energy storage balances the supply and demand fluctuations of the new energy system, the grid-type wind turbine group performs load following.

[0090] Obtain the working status of the grid-type energy storage in the new energy system, wherein the new energy system includes at least grid-type energy storage and wind turbines. "Wind-storage hybrid grid" refers to combining wind turbines with grid-type energy storage to jointly build a power grid system that can operate stably. The wind-storage hybrid grid system includes at least grid-type energy storage and wind turbines. In addition, the wind turbines include at least grid-type wind turbines and may also include grid-following wind turbines. In this application, the working status of the grid-type energy storage in the new energy system is monitored in real time to determine whether the current grid-type energy storage is in a normal working state or an abnormal working state. Specifically, a preset detection is performed on the grid-type energy storage device, for example, the preset detection includes battery charging and discharging status detection, battery charge status detection, converter operation status detection, etc. When the battery operating state is chargeable and dischargeable, the battery charge and discharge state detection result is determined to be normal; when the battery charge is within the preset charge range, such as between 10% and 90%, the battery charge state detection result is determined to be normal. Otherwise, when the battery charge exceeds the preset charge range, it will cause the continuous support capacity of the new energy system to be limited, and the battery charge state detection result is determined to be abnormal. When the temperature, current, voltage, efficiency, and harmonic content of the converter are all within the normal range and meet the dynamic response test, the converter operation state detection result is determined to be normal. When the detection results of the preset detection are all normal, the working state of the grid-type energy storage is determined to be normal.

[0091] Since the grid-type energy storage uses batteries and other energy storage devices as carriers, the energy reserves are relatively stable and sufficient. As long as the battery is in good condition and has power stored, it can reliably output electrical energy when needed. Therefore, when the grid-type energy storage is in normal working condition, the grid-type energy storage is controlled to operate in the grid-type mode, wherein when the grid-type energy storage operates in the grid-type mode, the grid-type energy storage balances the supply and demand fluctuations of the new energy system on the basis of satisfying the energy reserves. At this time, the grid-type energy storage converter actively generates the system voltage and frequency reference. Under the premise of ensuring its own energy reserves (such as reserving a certain SOC margin to cope with sudden disturbances), the grid-type energy storage actively balances the real-time power supply and demand fluctuations within the new energy system through charging and discharging operations. At this time, according to the energy reserves and system safety constraints, it adopts a peak-shaving and valley-filling charging and discharging strategy.

[0092] When the grid-forming energy storage is operating normally, it controls the wind turbines in grid-following mode while the grid-forming energy storage balances the fluctuations in supply and demand of the new energy system, while the wind turbines perform load following. At this point, the wind turbine converter tracks the grid frequency and voltage established by the grid-forming energy storage and adjusts its power output based on upper-level scheduling instructions or changes in system load. Furthermore, the generated power is dynamically adjusted based on real-time changes in system load, working in conjunction with the energy storage to meet the system's total power demand.

[0093] Figure 2 This is a diagram of the system operation of the grid-type energy storage in a normal state in one embodiment of the present application. Figure 2 As shown in the figure, under normal conditions, grid-type energy storage A operates in grid-type mode, while grid-type wind turbine B and grid-following wind turbine C are both in grid-following mode. When the system experiences a disturbance, grid-type energy storage A provides instantaneous active and reactive power support. Load balancing on slow timescales is achieved jointly by the wind turbines and energy storage, with the energy storage primarily providing peak load shaving and valley filling while maintaining energy reserves, while the wind turbines provide load following.

[0094] Figure 3 This is a flow chart of system energy management of grid-type energy storage in a grid-type mode in one embodiment of the present application; Figure 3 As shown in the figure, the strategy of grid-type energy storage to balance the supply and demand fluctuations of the new energy system on the basis of meeting the energy reserve is as follows: During the peak period, the system has sufficient wind resources and the power generation is much greater than the system load consumption (that is, the available power of the new energy system exceeds the load power). At this time, the grid-type energy storage is charged (energy storage power P E <0). Therefore, when P Ga +P Fa -P L >ξ1, (ξ1>0), the grid-type energy storage is charged, wherein the charging power satisfies the following conditions:

[0095] |P E |<P Ga +P Fa -P L ,|P E |≤maximum charging power-kPn;

[0096] Among them, P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; ξ is the preset power margin; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0097] It is understandable that if PGa +P Fa Just equal to P L During the off-peak period, the charging conditions are not met. The charging conditions are met only when the available output of the wind turbine is greater than a certain margin of the load.

[0098] During the trough period, the system wind resources are insufficient to support the system load consumption (that is, the available power of the new energy system is less than the load power). At this time, the grid-type energy storage is discharged (energy storage power P E >0). Therefore, when P Ga +P Fa -P L <ξ2, (ξ1>ξ2>0), the grid-type energy storage is discharged, wherein the discharge power satisfies the following conditions:

[0099] |P E |≤P L ,|P E |<Maximum discharge power - kPn.

[0100] In one embodiment, in order to improve the dynamic stability of the system, a rapid response mechanism for system disturbances is provided: when the grid-type energy storage is in normal working condition, when the system is disturbed, instantaneous support is provided by the grid-type energy storage to compensate for the system disturbance. For example, when there is a sudden and significant increase / decrease in load, a line fault causes a voltage drop or frequency offset, etc., the grid-type energy storage system in the grid-type mode can respond quickly and provide instantaneous active and reactive power support. It is achieved by quickly suppressing the sharp fluctuations in voltage and frequency and reducing the impact of system disturbances. In the case that the instantaneous support provided by the grid-type energy storage cannot completely eliminate the system disturbance, the grid-type energy storage and the wind turbine group jointly perform a frequency adjustment to eliminate the system disturbance. At this time, the wind turbine group will adjust the power output according to the detected frequency deviation, cooperate with the energy storage, and jointly undertake the frequency regulation task, so as to eliminate the system disturbance with a stronger combined force and restore the system balance.

[0101] Furthermore, if the wind turbine group includes both grid-forming wind turbines and grid-following wind turbines, if the grid-forming energy storage system experiences an anomaly and is unable to continue its primary grid-forming tasks, the grid-forming wind turbines are controlled to switch to grid-forming mode. After switching to grid-forming mode, the grid-forming wind turbines support a preset proportion of the load while maintaining energy reserves, with the remaining load supported by the grid-following wind turbines. In this case, the grid-forming energy storage system primarily serves the purpose of restoring normal charge. Figure 4 This is a system operation diagram of the grid-type energy storage in an abnormal state in an embodiment of the present application, such as Figure 4As shown, grid-connected wind turbine B is operating in grid-connected mode. When a system disturbance occurs, the grid-connected wind turbine provides primary instantaneous active and reactive power support. If its support capacity is insufficient, the grid-connected wind turbine will participate in a frequency modulation operation alongside other grid-connected wind turbines (and even other adjustable resources) in the system to stabilize the system. If an abnormality in the grid-connected energy storage occurs due to its charge exceeding the normal range, the grid-connected energy storage is controlled to restore its charge. Figure 5 This is a flow chart of system energy management of a grid-type wind turbine group in a grid-type mode in an embodiment of the present application, as shown in FIG. Figure 5 As shown, the charge recovery strategy of the grid-type energy storage is as follows: when the charge is lower than a first preset value, it indicates that the charge is too low, and the grid-type energy storage is charged, wherein the first preset value is the minimum value of the normal charge range of the grid-type energy storage, and the charging power of the grid-type energy storage meets the following conditions:

[0102] |PE|<P Ga +P Fa -P L -kPn, |PE|≤maximum charging power;

[0103] When the charge is higher than the second preset threshold, it indicates that the charge is too high and the energy storage is discharged. The second preset value is the maximum value of the normal charge range of the grid-type energy storage, and the discharge power of the grid-type energy storage meets the following conditions:

[0104] |PE|≤PL, |PE|<maximum discharge power;

[0105] Among them, the P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0106] When the energy storage fails, no charging or discharging operations are performed.

[0107] The beneficial effects of the present application are: when the grid-type energy storage is working normally, the grid-type energy storage is controlled to work in the grid-type mode and the grid-type wind turbine unit works in the grid-following mode, thereby avoiding the system's high dependence on energy storage and improving the reliability of the new energy system; and, the grid-type energy storage balances the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves, and the grid-type wind turbine unit performs load following, so that the grid-type energy storage and the grid-type wind turbine unit find a better balance between energy reservation and participation in system load regulation, avoiding energy waste caused by excessive energy reservation and improving the energy utilization efficiency of the equipment. In summary, the present application achieves the dual goals of strong grid support and efficient energy utilization through load regulation optimization on the basis of ensuring that the system voltage and frequency can be supported, thereby improving the reliability and energy utilization efficiency of the new energy system.

[0108] In one embodiment, the method may also be implemented as the following steps A1-A2:

[0109] In step A1, when a disturbance occurs in the system, the grid-type energy storage provides instant support to compensate for the system disturbance;

[0110] In step A2, when the instantaneous support provided by the grid-type energy storage cannot completely eliminate the system disturbance, the grid-type energy storage and the wind turbine group enter into a primary frequency modulation to further eliminate the system disturbance.

[0111] In one embodiment, the strategy of balancing the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves can be implemented as follows: Steps B1-B2:

[0112] In step B1, when P Ga +P Fa -P L >ξ1, (ξ1>0), the grid-type energy storage is charged, wherein the charging power satisfies the following conditions:

[0113] |P E |<P Ga +P Fa -P L ,|P E |≤maximum charging power-kPn;

[0114] In step B2, when P Ga +P Fa -P L <ξ2, (ξ1>ξ2>0), the grid-type energy storage is discharged, wherein the discharge power satisfies the following conditions:

[0115] |P E |≤PL ,|P E |<maximum discharge power-kPn;

[0116] Among them, P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; ξ is the preset power margin; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0117] In one embodiment, the load following strategy of the grid-type wind turbine group may be implemented as follows:

[0118] In step C1, the power of the grid-type energy storage and the load power are obtained according to the system power balance relationship;

[0119] In step C2, the target power value of the wind turbine group is calculated according to the power of the grid-type energy storage and the load power;

[0120] In step C3, the wind turbine group is controlled to perform load following according to the power target value.

[0121] Figure 6 This is a flow chart of the load following strategy of the wind turbine group in the grid-type energy storage in the grid-type mode in one embodiment of the present application; in this embodiment, the power of the grid-type energy storage and the load power are obtained according to the system power balance relationship. Specifically, the system power balance relationship is P W +P E =P L , where P W is the target power value of the wind turbine in the grid-following mode, P E is the power of grid-type energy storage, P L is the power required by the system. In an isolated grid application environment, P L Specifically, it is the load power. In the application environment of connecting to the external power grid, P L is the scheduling target value of the scheduling system.

[0122] Therefore, after obtaining the power of the grid-type energy storage and the load power, the target power value of the wind turbine group can be calculated according to the power of the grid-type energy storage and the load power.

[0123] According to the power target value, the wind turbine group is controlled to perform load following. Specifically, according to the power target value P W The control system sends this target to the wind turbine group, and usually uses advanced control algorithms (such as PID controller) to track the target value, so that the actual total output of the wind turbine group is as close to P as possible. WIn a wind farm consisting of multiple wind turbines, the total target power must be reasonably allocated to each grid-type wind turbine participating in load following according to a certain allocation strategy (such as based on the equal margin principle, allocation according to the proportion of available wind power, etc.).

[0124] In one embodiment, the wind turbine group includes a grid-type wind turbine group and a grid-following wind turbine group, and the method can also be implemented as follows:

[0125] When an abnormality occurs in the grid-type energy storage, the grid-type wind turbine group is controlled to switch to the grid-type mode. After the grid-type wind turbine group switches to the grid-type mode, the grid-type wind turbine group participates in the load support of a preset proportion on the basis of ensuring energy reserves, and the remaining load support is balanced by the grid-following wind turbine group.

[0126] The beneficial effect of this embodiment is that when the grid-type energy storage is abnormal, the grid can be built through the grid-type wind turbine group, so that the grid-building equipment can be flexibly adjusted according to the operating status of the grid, avoiding the situation where the grid system is paralyzed due to the abnormality of the grid-type energy storage and increasing robustness.

[0127] In one embodiment, the method may also be implemented as follows:

[0128] When the abnormality of the grid-type energy storage occurs because the charge of the grid-type energy storage exceeds a normal range, the grid-type energy storage is controlled to recover the charge.

[0129] In one embodiment, the strategy for controlling the grid-type energy storage to perform charge recovery can be implemented as follows: Steps D1-D2:

[0130] In step D1, when the charge is lower than a first preset value, the grid-type energy storage is charged. The first preset value is the minimum value of the normal charge range of the grid-type energy storage. The charging power of the grid-type energy storage meets the following conditions:

[0131] |PE|<P Ga +P Fa -P L -kPn, |PE|≤maximum charging power;

[0132] In step D2, when the charge is higher than a second preset threshold, the energy storage is discharged. The second preset value is the maximum value of the normal charge interval of the grid-type energy storage. The discharge power of the grid-type energy storage satisfies the following conditions:

[0133] |PE|≤PL, |PE|<maximum discharge power;

[0134] Among them, the P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fais the available power of the grid-type unit; P L is the power required by the system; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0135] Figure 7 This is a flow chart of a load regulation strategy for a grid-type wind turbine in grid-type mode in one embodiment of the present application. In this embodiment, the output distribution method for the grid-type wind turbine is as follows: the active power distribution of the grid-type wind turbine considers the reserved energy reserve and sets the reserved coefficient k. The target power value of the grid-type wind turbine should meet the following requirements:

[0136] ;

[0137] in, is the target power value of the grid-type wind turbine; g n is the number of grid-type fans; is the available power of the i-th grid-type wind turbine, which can be calculated based on the real-time wind speed and wind power characteristics of the unit; k is the reserved coefficient; Pn is the maximum capacity of the system.

[0138] Then, the total active power P of the grid-type wind turbine is obtained G , PID control algorithm is used for target following, and the output of all wind turbines is distributed based on the equal margin principle.

[0139] In this embodiment, the output distribution strategy for the grid-following wind turbine group is as follows:

[0140] Calculate the target power value of the grid-fed wind turbine group:

[0141] ;

[0142] in, is the power target value of the grid-following wind turbine group; P L is the power required by the system; P E is the energy storage power; P G is the total active power of the grid-type wind turbine group.

[0143] Get the real-time total active power P of the grid-fed wind turbine group F , PID control algorithm is used for target following, and the output of all wind turbines is distributed based on the equal margin principle.

[0144] In one embodiment of the present application, the method for target following using the PID control algorithm is as follows:

[0145] First, obtain the deviation between the power target value and the real-time value of the wind turbine group; then substitute the deviation into the following formula to calculate the total power adjustment value corresponding to the wind turbine group:

[0146] Pdelta = ;

[0147] Among them, P delta is the total power adjustment value, and ΔP is the difference between the target value and the real-time value.

[0148] The output distribution of all wind turbines based on the equal margin principle includes:

[0149] The power adjustment value of each fan (i.e. the adjustable output of the fan) is calculated according to the following formula:

[0150] P delta (i)= P delta , ;

[0151] Among them, P delta (i) is the power adjustment value of the i-th fan, P delta is the total power adjustment value, w i is the power adjustment coefficient of the i-th wind turbine, N is the total number of wind turbines participating in the allocation, and Pa(i) is the available power of the i-th wind turbine.

[0152] The advantages of the wind-storage hybrid network control method provided in this application are:

[0153] (1) Significantly improve system stability. This wind-storage hybrid grid control method clarifies the division of roles, allowing grid-type energy storage to take on the key task of actively supporting the power grid. As a voltage source, grid-type energy storage can continuously stabilize the voltage and frequency of the grid, provide virtual inertia and damping, and effectively respond to challenges such as reduced inertia and decreased short-circuit capacity brought about by the "double high characteristics" of a high-proportion new energy grid. When a disturbance occurs in the system, the grid-type energy storage can respond in milliseconds, slowing down the rate of change of frequency (RoCoF), preventing voltage collapse, and significantly enhancing system stability. At the same time, this method effectively suppresses subsynchronous oscillations and broadband oscillations that may occur in the grid through the damping capacity of energy storage.

[0154] (2) Significantly improve the capacity to absorb renewable energy. This control method fully utilizes the energy time shifting and power leveling functions of energy storage, effectively solving the intermittent and fluctuating problems of renewable energy such as wind power. Grid-connected energy storage can charge and store energy during periods of high wind power generation, and discharge to supplement energy when wind power output is insufficient, making the grid-connected power curve smoother and reducing the impact on the power grid. This mechanism can significantly reduce the phenomenon of wind power curtailment and power rationing, improve the capacity value and energy value of wind farms, and promote the healthy development of new energy systems with a high proportion of renewable energy.

[0155] (3) Enhanced system operational flexibility and adaptability. Faced with the variable operating conditions of new energy systems, this control method enhances the overall adaptability and resilience of the system through a precise coordinated control mechanism. Grid-connected energy storage improves the system's fault ride-through capability, making it easier for wind turbines to meet low voltage ride-through (LVRT) requirements during grid faults and avoid chain disconnections. In addition, the autonomous voltage and frequency building capabilities of grid-connected energy storage enable it to support black starts and isolated grid operations, ensuring power supply to critical loads in extreme situations.

[0156] (4) Optimize the division of equipment functions and improve resource utilization efficiency. This approach achieves clear positioning of equipment roles and complementary advantages: grid-connected energy storage focuses on providing stable support and flexible adjustment for the power grid, while wind turbines focus on maximizing wind energy capture and generating electricity efficiently. This division of labor enables each device to play its inherent strengths, avoiding functional overlap and resource waste. At the same time, since wind turbines operate in a stable power grid environment, they can reduce the risk of output restrictions or disconnection due to grid disturbances, thereby improving wind energy utilization and the economic benefits of the equipment.

[0157] Overall, this wind-storage hybrid grid control method effectively addresses the stability, volatility, and flexibility challenges faced by new energy systems through the collaborative working mode of "energy storage grid + wind turbine grid", providing solid technical support for new energy systems with a high proportion of renewable energy, and is of great value in promoting energy transformation and achieving the "dual carbon" goals.

[0158] Figure 8 This is a schematic diagram of the structure of a control device for a wind-storage hybrid network in one embodiment of the present application. Figure 8 As shown, the device includes:

[0159] An acquisition module 801 is configured to acquire the operating status of a grid-type energy storage in a new energy system, wherein the new energy system includes at least a grid-type energy storage and a wind turbine group;

[0160] A first control module 802 is configured to control the grid-forming energy storage to operate in a grid-forming mode when the grid-forming energy storage is in normal working condition, wherein when the grid-forming energy storage operates in the grid-forming mode, the grid-forming energy storage balances supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves;

[0161] The second control module 803 is used to control the grid-type wind turbine group to operate in a grid-following mode. While the grid-type energy storage balances the supply and demand fluctuations of the new energy system, the grid-type wind turbine group performs load following.

[0162] In one embodiment, the apparatus further comprises:

[0163] A support module is used to provide instantaneous support through the grid-type energy storage when a disturbance occurs in the system to compensate for the system disturbance;

[0164] The frequency regulation module is used to enter into a primary frequency regulation through the grid-type energy storage and the wind turbine group to further eliminate the system disturbance when the instantaneous support provided by the grid-type energy storage cannot completely eliminate the system disturbance.

[0165] In one embodiment, the strategy of the grid-type energy storage to balance the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves is as follows:

[0166] When P Ga +P Fa -P L >ξ1, (ξ1>0), the grid-type energy storage is charged, wherein the charging power satisfies the following conditions:

[0167] |P E |<P Ga +P Fa -P L ,|P E |≤maximum charging power-kPn;

[0168] When P Ga +P Fa -P L <ξ2, (ξ1>ξ2>0), the grid-type energy storage is discharged, wherein the discharge power satisfies the following conditions:

[0169] |P E |≤P L ,|P E |<maximum discharge power-kPn;

[0170] Among them, P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; ξ is the preset power margin; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0171] In one embodiment, the load following strategy of the wind turbine group is as follows:

[0172] Obtain the power of grid-type energy storage and load power based on the system power balance relationship;

[0173] Calculating the target power value of the wind turbine group according to the power of the grid-type energy storage and the load power;

[0174] The wind turbine group is controlled to perform load following according to the power target value.

[0175] In one embodiment, the apparatus further comprises:

[0176] The switching module is used to control the grid-type wind turbine group to switch to the grid-type mode when an abnormality occurs in the grid-type energy storage. After the grid-type wind turbine group switches to the grid-type mode, the grid-type wind turbine group participates in the load support of a preset proportion on the basis of ensuring energy reserves, and the remaining load support is balanced by the grid-following wind turbine group.

[0177] In one embodiment, the apparatus further comprises:

[0178] The recovery module is used to control the grid-type energy storage to perform charge recovery when the abnormality of the grid-type energy storage occurs because the charge of the grid-type energy storage exceeds the normal range.

[0179] In one embodiment, the strategy for controlling the grid-type energy storage to perform charge recovery is as follows:

[0180] When the charge is lower than a first preset value, the grid-type energy storage is charged. The first preset value is the minimum value of the normal charge range of the grid-type energy storage. The charging power of the grid-type energy storage meets the following conditions:

[0181] |PE|<P Ga +P Fa -P L -kPn, |PE|≤maximum charging power;

[0182] When the charge is higher than a second preset threshold, the energy storage is discharged. The second preset value is the maximum value of the normal charge range of the grid-type energy storage. The discharge power of the grid-type energy storage meets the following conditions:

[0183] |PE|≤PL, |PE|<maximum discharge power;

[0184] Among them, the P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

[0185] The present application also provides a control system for a wind-storage hybrid network, comprising:

[0186] at least one processor; and,

[0187] a memory communicatively connected to the at least one processor; wherein,

[0188] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to implement the control method of the wind-storage hybrid network recorded in any of the above embodiments.

[0189] Figure 9 This is a hardware structure diagram of a control system for a wind-storage hybrid network in one embodiment of the present application. Figure 9 As shown, the control system of the wind-storage hybrid network includes:

[0190] at least one processor 920; and,

[0191] A memory 904 in communication with the at least one processor 920; wherein,

[0192] The memory 904 stores instructions that can be executed by the at least one processor 920, and the instructions are executed by the at least one processor 920 to implement the control method of the wind-storage hybrid network recorded in any of the above embodiments.

[0193] Reference Figure 9 The control system 900 of the wind-storage hybrid network may include one or more of the following components: a processing component 902, a memory 904, a power supply component 906, a multimedia component 908, an audio component 910, an input / output (I / O) interface 912, a sensor component 914, and a communication component 916.

[0194] The processing component 902 generally controls the overall operation of the control system 900 for the wind-storage hybrid grid. The processing component 902 may include one or more processors 920 to execute instructions to complete all or part of the steps of the above-described method. Furthermore, the processing component 902 may include one or more modules to facilitate interaction between the processing component 902 and other components. For example, the processing component 902 may include a multimedia module to facilitate interaction between the multimedia component 908 and the processing component 902.

[0195] The memory 904 is configured to store various types of data to support the operation of the wind-storage hybrid grid control system 900. Examples of such data include instructions for any application or method operating on the wind-storage hybrid grid control system 900, such as text, images, and videos. The memory 904 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0196] The power supply assembly 906 provides power to various components of the wind-storage hybrid grid control system 900. The power supply assembly 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the wind-storage hybrid grid control system 900.

[0197] The multimedia component 908 includes a screen that provides an output interface between the wind-storage hybrid network control system 900 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, it may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensors can detect not only the boundaries of a touch or slide action, but also the duration and pressure associated with the touch or slide action. In some embodiments, the multimedia component 908 may also include a front-facing camera and / or a rear-facing camera. When the wind-storage hybrid network control system 900 is in an operating mode, such as a capture mode or a video mode, the front-facing camera and / or the rear-facing camera can receive external multimedia data. Each front-facing camera and the rear-facing camera can have a fixed optical lens system or have a variable focal length and optical zoom capability.

[0198] The audio component 910 is configured to output and / or input audio signals. For example, the audio component 910 includes a microphone (MIC) configured to receive external audio signals when the wind-storage hybrid network control system 900 is in an operating mode, such as alarm mode, recording mode, voice recognition mode, and voice output mode. The received audio signals may be further stored in the memory 904 or transmitted via the communication component 916. In some embodiments, the audio component 910 also includes a speaker for outputting audio signals.

[0199] I / O interface 912 provides an interface between processing component 902 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to, a home button, volume buttons, a start button, and a lock button.

[0200] The sensor assembly 914 includes one or more sensors for providing status assessments of various aspects for the control system 900 of the wind-storage hybrid network. For example, the sensor assembly 914 may include a sound sensor. In addition, the sensor assembly 914 can detect the open / closed state of the control system 900 of the wind-storage hybrid network, the relative positioning of components, such as the display and keypad of the control system 900 of the wind-storage hybrid network, and the sensor assembly 914 can also detect the operating state of the control system 900 of the wind-storage hybrid network or a component of the control system 900 of the wind-storage hybrid network. The sensor assembly 914 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0201] The communication component 916 is configured to enable the control system 900 of the wind-storage hybrid network to provide wired or wireless communication capabilities with other devices and cloud platforms. The control system 900 of the wind-storage hybrid network can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 916 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0202] In an exemplary embodiment, the control system X00 of the wind-storage hybrid network can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to execute the control method of the wind-storage hybrid network described in any of the above embodiments.

[0203] The present application also provides a computer-readable storage medium. When the instructions in the storage medium are executed by the processor corresponding to the control system of the wind-storage hybrid network, the control system of the wind-storage hybrid network can implement the control method of the wind-storage hybrid network recorded in any of the above embodiments.

[0204] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage) containing computer-usable program code.

[0205] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0206] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0207] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0208] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A control method for a wind-storage hybrid network, characterized in that: include: Obtaining a working status of a grid-type energy storage in a new energy system, wherein the new energy system includes at least a grid-type energy storage and a wind turbine group, and the wind turbine group includes a grid-type wind turbine group and a grid-following wind turbine group; When the grid-type energy storage is in a normal working state, controlling the grid-type energy storage to operate in a grid-type mode, wherein when the grid-type energy storage operates in the grid-type mode, the grid-type energy storage balances the supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves; controlling the grid-forming wind turbines in the wind turbine group to operate in a grid-following mode, so that the wind turbine group performs load following while the grid-forming energy storage balances the supply and demand fluctuations of the new energy system; The method further comprises: When an abnormality occurs in the grid-type energy storage, the grid-type wind turbine group is controlled to switch to the grid-type mode. After the grid-type wind turbine group switches to the grid-type mode, the grid-type wind turbine group participates in the load support of a preset proportion on the basis of ensuring energy reserves, and the remaining load support is balanced by the grid-following wind turbine group.

2. The method according to claim 1, wherein The method further comprises: When a disturbance occurs in the system, the grid-type energy storage provides instant support to compensate for the system disturbance; In the case that the instantaneous support provided by the grid-type energy storage cannot completely eliminate the system disturbance, the grid-type energy storage and the wind turbine group enter into a primary frequency modulation to further eliminate the system disturbance.

3. The method according to claim 1, wherein The strategy of the grid-type energy storage to balance the supply and demand fluctuations of the new energy system on the basis of meeting the energy reserve requirements is as follows: When P Ga +P Fa -P L >ξ1, ξ1>0, the grid-type energy storage is charged, wherein the charging power meets the following conditions: |P E |<P Ga +P Fa -P L ,|P E |≤maximum charging power-kPn; When P Ga +P Fa -P L <ξ2,ξ1>ξ2>0, the grid-type energy storage is discharged, wherein the discharge power satisfies the following conditions: |P E |≤P L ,|P E |< maximum discharge power - kPn; Among them, P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; ξ1 and ξ2 are the preset power margins; Pn is the maximum capacity of the system; and k is the reserved energy coefficient.

4. The method according to claim 1, wherein The load following strategy of the fan group is as follows: Obtain the power of grid-type energy storage and load power based on the system power balance relationship; Calculating the target power value of the wind turbine group according to the power of the grid-type energy storage and the load power; The wind turbine group is controlled to perform load following according to the target power value.

5. The method according to claim 1, wherein The method further comprises: When the abnormality of the grid-type energy storage occurs because the charge of the grid-type energy storage exceeds a normal range, the grid-type energy storage is controlled to recover the charge.

6. The method according to claim 5, wherein The strategy for controlling grid-type energy storage to restore charge is as follows: When the charge is lower than a first preset value, the grid-type energy storage is charged. The first preset value is the minimum value of the normal charge range of the grid-type energy storage. The charging power of the grid-type energy storage meets the following conditions: |P E |<P Ga +P Fa -P L -kPn,|P E |≤maximum charging power; When the charge is higher than a second preset threshold, the energy storage is discharged. The second preset threshold is the maximum value of the normal charge range of the grid-type energy storage. The discharge power of the grid-type energy storage meets the following conditions: |P E |≤P L ,|P E | < maximum discharge power; Among them, the P E is the energy storage power; P Ga P is the available power of the grid-following unit; Fa is the available power of the grid-type unit; P L is the power required by the system; Pn is the maximum capacity of the system; k is the reserved energy coefficient.

7. A control device for a wind-storage hybrid network, characterized in that: include: An acquisition module is used to obtain the working status of the grid-type energy storage in the new energy system, wherein the new energy system at least includes the grid-type energy storage and a wind turbine group, and the wind turbine group includes a grid-type wind turbine group and a grid-following wind turbine group; a first control module, configured to control the grid-forming energy storage to operate in a grid-forming mode when the grid-forming energy storage is in a normal working state, wherein when the grid-forming energy storage operates in the grid-forming mode, the grid-forming energy storage balances supply and demand fluctuations of the new energy system on the basis of satisfying energy reserves; A second control module is used to control the grid-type wind groups in the wind turbine groups to operate in a grid-following mode, so that while the grid-type energy storage balances the supply and demand fluctuations of the new energy system, the grid-type wind groups perform load following; The device further comprises: The switching module is used to control the grid-type wind turbine group to switch to the grid-type mode when an abnormality occurs in the grid-type energy storage. After the grid-type wind turbine group switches to the grid-type mode, the grid-type wind turbine group participates in the load support of a preset proportion on the basis of ensuring energy reserves, and the remaining load support is balanced by the grid-following wind turbine group.

8. A control system for a wind-storage hybrid network, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to implement the control method of the wind-storage hybrid network as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that When the instructions in the storage medium are executed by the processor corresponding to the control system of the wind-storage hybrid network, the control system of the wind-storage hybrid network can implement the control method of the wind-storage hybrid network as described in any one of claims 1-6.

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