Hybrid energy storage control method and device for smoothing wind power output power

Abstract

The invention provides a hybrid energy storage control method and device for smoothing wind power output power. The first output power reference value and the actual output power of each current collection line in the wind power plant in the current control time period and the SOC value of each energy storage device of the current collection line in the current control time period are determined; based on the SOC value of each energy storage device, determining the charging and discharging maximum power of the corresponding energy storage device; based on the first output power reference value and the actual output power of each current collection line and the maximum charging and discharging power of each energy storage device, determining a second output power reference value of each current collection line in the next control time period and the target charging and discharging power of the corresponding energy storage device in the current control time period; determining a target voltage of the corresponding energy storage device based on the charging and discharging target power of each energy storage device; and controlling each energy storage device of each current collection line to work under the corresponding target voltage. Therefore, the fluctuation of the wind power output power is effectively reduced, and the stability of the wind power output power is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind power generation, and in particular to a hybrid energy storage control method and device for smoothing wind power output power. Background Art

[0002] As the global demand for clean energy increases, wind power, as a green and renewable energy, is gradually becoming an important part of the energy structure. However, unlike conventional energy (such as thermal power and hydropower), wind energy has the characteristics of randomness, volatility and intermittence, which leads to unstable and volatile wind power output. With the large-scale grid connection of wind power, it will inevitably bring challenges to the dispatching and stable operation of the power grid. How to propose a method for smoothing wind power output to improve the stability of wind power output is a problem that needs to be solved urgently. Summary of the invention

[0003] The present disclosure provides a hybrid energy storage control method and device for smoothing wind power output power.

[0004] According to one aspect of the present disclosure, a hybrid energy storage control method for smoothing wind power output power is provided, comprising:

[0005] After receiving the instruction to smooth the wind power output power, determine the first output power reference value and the actual output power of each collector line in the wind farm in the current control period, and the state of charge SOC value of the first energy storage device and the second energy storage device of each collector line in the current control period;

[0006] Based on the state of charge SOC value of each of the energy storage devices of each of the collecting lines, respectively determine a first maximum charge and discharge power of the corresponding first energy storage device and a second maximum charge and discharge power of the corresponding second energy storage device;

[0007] Based on the first output power reference value and actual output power of each of the collector lines, and the maximum charge and discharge power of each energy storage device in the corresponding collector line, respectively determine the second output power reference value of each of the collector lines in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period;

[0008] Based on the charge and discharge target powers of the energy storage devices of each of the collecting lines, respectively determining a first target voltage of the first energy storage device of each of the collecting lines and a second target voltage of the second energy storage device;

[0009] The first energy storage device and the second energy storage device of each collecting line are controlled to operate at corresponding target voltages respectively.

[0010] According to another aspect of the present disclosure, a hybrid energy storage control device for smoothing wind power output power is provided, comprising:

[0011] A first determination module is used to determine, after receiving an instruction to smooth the wind power output, a first output power reference value and an actual output power of each collector line in the wind farm in a current control period, and a state of charge SOC value of the first energy storage device and the second energy storage device of each collector line in the current control period;

[0012] A second determination module is used to determine, based on the state of charge SOC value of each energy storage device of each collector line, a first maximum charge and discharge power of the corresponding first energy storage device and a second maximum charge and discharge power of the corresponding second energy storage device;

[0013] A third determination module is used to determine the second output power reference value of each of the collector lines in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period, based on the first output power reference value and actual output power of each of the collector lines, and the maximum charge and discharge power of each energy storage device in the corresponding collector line;

[0014] a fourth determination module, configured to determine, based on the charge and discharge target powers of the energy storage devices of each of the collector lines, respectively a first target voltage of the first energy storage device of each of the collector lines and a second target voltage of the second energy storage device;

[0015] The control module is used to control the first energy storage device and the second energy storage device of each of the collecting lines to operate at corresponding target voltages respectively.

[0016] According to another aspect of the present disclosure, there is provided an electronic device, comprising:

[0017] at least one processor;

[0018] and, a memory communicatively coupled to the at least one processor;

[0019] The memory stores instructions to be executed by at least one processor, and the instructions are executed by at least one processor so that the at least one processor can execute the method of the above embodiment.

[0020] According to another aspect of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to cause a computer to execute the method according to the above embodiment.

[0021] The present disclosure provides a hybrid energy storage control method and device for smoothing wind power output power. After receiving the instruction for smoothing the wind power output power, first determine the first output power reference value and the actual output power of each collector in the wind farm in the current control period, as well as the state of charge SOC values ​​of the first energy storage device and the second energy storage device of each collector in the current control period, and based on the state of charge SOC value of each energy storage device of each collector, respectively determine the first maximum charge and discharge power of the corresponding first energy storage device, and the second maximum charge and discharge power of the corresponding second energy storage device, then based on the first output power reference value and the actual output power of each collector, as well as the maximum charge and discharge power of each energy storage device in the corresponding collector, respectively determine the second output power reference value of the next control period adjacent to the current control period of each collector, and the charge and discharge target power of the corresponding energy storage device in the current control period, then based on the charge and discharge target power of each energy storage device of each collector, respectively determine the first target voltage of the first energy storage device of each collector, and the second target voltage of the second energy storage device, and finally control the first energy storage device and the second energy storage device of each collector to operate at the corresponding target voltages, respectively. Therefore, by determining the target charging and discharging power of the corresponding energy storage device based on the output power reference value and actual output power of each collector line in the wind farm and the SOC value of each energy storage device in the collector line, and then determining the target voltage of the corresponding energy storage device based on the charge and discharge target power, and operating at the target voltage, the volatility of wind power output power is effectively reduced, the stability of wind power output power is improved, and the reliability of hybrid energy storage control used to smooth wind power output power is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0023] Figure 1 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure;

[0024] Figure 2 A schematic diagram of an application scenario of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure;

[0025] Figure 3 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure;

[0026] Figure 4 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure;

[0027] Figure 5 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure;

[0028] Figure 6 A schematic diagram of the structure of a conversion controller in a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure;

[0029] Figure 7 A schematic diagram of a phase-locked loop calculation process provided by an embodiment of the present disclosure;

[0030] Figure 8 A schematic diagram of the structure of a conversion controller in a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure;

[0031] Fig. 9 A schematic diagram of the structure of a hybrid energy storage control device for smoothing wind power output power provided in an embodiment of the present disclosure;

[0032] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure.

[0033] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0035] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this disclosure are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0036] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution disclosed in this disclosure are in compliance with the relevant provisions of national laws and regulations.

[0037] The hybrid energy storage control method for smoothing wind power output power according to an embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0038] Figure 1 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure.

[0039] like Figure 1 As shown, the method includes:

[0040] Step 101, after receiving the instruction for smoothing the wind power output power, determine the first output power reference value and the actual output power of each collector in the wind farm in the current control period, and the state of charge SOC value of the first energy storage device and the second energy storage device of each collector in the current control period.

[0041] The control period may be a period for controlling the output energy storage device on the collector line.

[0042] The duration of the control period may be preset, or may be determined as required. For example, the duration of the control period may be 1 minute, which is not limited in the present disclosure.

[0043] The first output power reference value may be a reference value for the smooth output power of each collector line in the wind farm.

[0044] The actual output power may be the sum of the powers of all wind turbines in each collector line.

[0045] Among them, the first energy storage device is an electrochemical energy storage device, and the second energy storage device is a supercapacitor energy storage device.

[0046] Among them, SOC is the abbreviation of State of Charge (SOC), which is the ratio of the remaining power of the energy storage device to the rated capacity.

[0047] It should be noted that the number of collector lines in a wind farm and the number of wind turbines on each collector line can be determined according to actual conditions, and the present disclosure does not impose any limitation on this.

[0048] It should be noted that the hybrid energy storage control method for smoothing wind power output power proposed in the embodiment of the present disclosure can be applied to the hybrid energy storage control scenario on the AC side of the collector, such as Figure 2 As shown, Figure 2 A schematic diagram of an application scenario of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure. Figure 2In the hybrid energy storage device, electrochemical energy storage device and supercapacitor energy storage device are taken as examples. There are n 6-collectors in the wind farm, each of which is equipped with m wind turbines. At the end of each collector, the wind turbine box is transformed into a low-voltage AC side and connected to the hybrid energy storage device. Among them, the wind turbine is mainly composed of 1-power generation system (including impeller, rotating chain and generator), 2-converter and 3-box transformer, 4-electrochemical energy storage device is mainly composed of battery system 4-1, inverter 4-2 and circuit breaker 4-3, etc., 5-supercapacitor energy storage device is mainly composed of supercapacitor 5-1, inverter 5-2 and circuit breaker 5-3, etc. Each collector is connected to 8-66kV AC bus of booster station through 7-circuit breaker, and then the voltage is increased to 2220kV through 9-boosting transformer and then connected to the power grid. Among them, BESS is Battery Energy Storage System (Battery Energy Storage SESS is the abbreviation of Supercapacitor Energy Storage System (SESS); AC is Alternating Current; DC is Direct Current. Figure 2 This is only an example and the present disclosure is not limited thereto.

[0049] In the present disclosure, after receiving an instruction to smooth the wind power output power, in order to reduce the volatility of the wind power output power and improve the stability of the wind power output power, the first output power reference value and the actual output power of each collector line in the wind farm in the current control period, as well as the state of charge SOC values ​​of the first energy storage device and the second energy storage device of each collector line in the current control period can be first determined, thereby providing a data basis for hybrid energy storage control for smoothing the wind power output power.

[0050] In some embodiments, after receiving the instruction to smooth the wind power output power, when the wind power smooth output control is started, the average output power of each collector in a preset period of time (such as the first 10 minutes) can be counted, and used as the first output power reference value of the corresponding collector in the first control period, as shown in formula (1), wherein formula (1) is illustrated by taking the average output power of the first 10 minutes as an example, and the present disclosure does not limit this:

[0051]

[0052] Among them, j is the control period; is the first output power reference value of the i-th collector line in the current control period j; L,i (jm), is the average output power of the ith collector line in the jm time period, each time period corresponds to 1 minute.

[0053] Step 102 : based on the state of charge (SOC) value of each energy storage device of each collector line, respectively determine a first maximum charge / discharge power of the corresponding first energy storage device and a second maximum charge / discharge power of the corresponding second energy storage device.

[0054] The first maximum charge and discharge power may include a first maximum charge power and a first maximum discharge power of the first energy storage device, and the second maximum charge and discharge power may include a second maximum charge power and a second maximum discharge power of the second energy storage device.

[0055] In the present disclosure, after determining the state of charge SOC value of the first energy storage device and the state of charge SOC value of the second energy storage device of each collecting line in the wind farm, in order to determine the charge and discharge target power of each energy storage device of each collecting line when smoothly controlling the wind power output power, to control the charge and discharge of the energy storage devices, it is possible to first determine the first maximum charge and discharge power of the corresponding first energy storage device and the second maximum charge and discharge power of the corresponding second energy storage device based on the state of charge of each energy storage device of each collecting line.

[0056] Step 103, based on the first output power reference value and actual output power of each collector line, and the maximum charge and discharge power of each energy storage device in the corresponding collector line, determine the second output power reference value of each collector line in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period.

[0057] The charging and discharging target power may be the charging and discharging target power or the discharging and discharging target power of the energy storage device in the current control period.

[0058] In the present disclosure, after determining the maximum charge and discharge power of each energy storage device of each collecting line, the second output power reference value of the next control period of each collecting line and the charge and discharge target power of the corresponding energy storage device in the control period to which the current control period belongs can be determined based on the first output power reference value and the actual output power of each collecting line, and the maximum charge and discharge power of each energy storage device in the corresponding collecting line, so that the energy storage devices of the wind farm can be controlled.

[0059] Step 104 : determining a first target voltage of a first energy storage device and a second target voltage of a second energy storage device of each collecting line based on the charging and discharging target powers of each energy storage device of each collecting line.

[0060] The first target voltage may be a control target value of the inverter modulation voltage of the first energy storage device, which may be a three-phase voltage, and the present disclosure does not limit this.

[0061] The second target voltage may be a control target value of the inverter modulation voltage of the second energy storage device, which may be a three-phase voltage, and the present disclosure does not limit this.

[0062] In the present disclosure, after determining the second output power reference value of each collector line for the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period, in order to enable the first energy storage device and the second energy storage device on the collector line to reach the corresponding charge and discharge target powers, the first target voltage of the corresponding first energy storage device and the second target voltage of the second energy storage device can be determined based on the charge and discharge target power of each energy storage device, thereby providing conditions for realizing hybrid energy storage control for smoothing wind power output power.

[0063] Step 105 , controlling the first energy storage device and the second energy storage device of each collector line to operate at corresponding target voltages respectively.

[0064] In the present disclosure, after determining that the first energy storage device and the second energy storage device of each collector line are at the corresponding target voltages, the corresponding energy storage devices can be controlled to operate at the corresponding target voltages, thereby achieving smooth control of wind power output power and effectively reducing the volatility of risky output power.

[0065] In the embodiment of the present disclosure, after receiving the instruction for smoothing the wind power output power, the first output power reference value and the actual output power of each collector line in the wind farm in the current control period, as well as the state of charge SOC values ​​of the first energy storage device and the second energy storage device of each collector line in the current control period are first determined, and based on the state of charge SOC value of each energy storage device of each collector line, the first maximum charge and discharge power of the corresponding first energy storage device and the second maximum charge and discharge power of the corresponding second energy storage device are respectively determined, and then based on the first output power reference value and the actual output power of each collector line, as well as the maximum charge and discharge power of each energy storage device in the corresponding collector line, the second output power reference value of the next control period adjacent to the current control period of each collector line and the charge and discharge target power of the corresponding energy storage device in the current control period are respectively determined, and then based on the charge and discharge target power of each energy storage device of each collector line, the first target voltage of the first energy storage device of each collector line and the second target voltage of the second energy storage device are respectively determined, and finally the first energy storage device and the second energy storage device of each collector line are controlled to operate at the corresponding target voltages respectively. Therefore, by determining the target charging and discharging power of the corresponding energy storage device based on the output power reference value and actual output power of each collector line in the wind farm and the SOC value of each energy storage device in the collector line, and then determining the target voltage of the corresponding energy storage device based on the charge and discharge target power, and operating at the target voltage, the volatility of wind power output power is effectively reduced, the stability of wind power output power is improved, and the reliability of hybrid energy storage control used to smooth wind power output power is improved.

[0066] Figure 3 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure.

[0067] like Figure 3 As shown, the method includes:

[0068] Step 301, after receiving the instruction for smoothing the wind power output power, determine the first output power reference value and actual output power of each collector in the wind farm in the current control period, and the state of charge SOC value of the first energy storage device and the second energy storage device of each collector in the current control period.

[0069] The specific implementation form of step 301 can refer to the detailed description in other embodiments of the present disclosure, and will not be described in detail here.

[0070] Step 302, based on the state of charge SOC value of the first energy storage device and the state of charge SOC value of the second energy storage device of each collector line, respectively determine the first coefficient of the corresponding energy storage device in the discharge mode and the second coefficient in the charge mode.

[0071] The first coefficient may be a discharge limit coefficient of the energy storage device, and the second coefficient may be a charge limit coefficient of the energy storage device.

[0072] In the present disclosure, after determining the state of charge SOC value of the first energy storage device of each collector line and the state of charge SOC value of the second energy storage device, when the power of the battery system of the first energy storage device is positive, it can be determined that the first energy storage device is in the discharge mode. At this time, the first coefficient of the first energy storage device in the discharge mode can be determined based on formula (2), wherein formula (2) is as follows, and formula (2) is only an example, and the present disclosure does not limit this:

[0073] Among them, K B_d,i , is the first coefficient of the first energy storage device of the i-th collector in the discharge mode; SOC B,i , is the state of charge SOC value of the first energy storage device of the i-th collector.

[0074] When the power of the supercapacitor of the second energy storage device is positive, it can be determined that the second energy storage device is in the discharge mode. At this time, the first coefficient of the second energy storage device in the discharge mode can be determined based on formula (3), where formula (3) is as follows. Formula (3) is only an example and is not limited in the present disclosure:

[0075]

[0076] Among them, K S_d,i , is the first coefficient of the second energy storage device of the i-th collector in the discharge mode, SOC S,i , is the state of charge SOC value of the second energy storage device of the i-th collector.

[0077] In the present disclosure, after determining the state of charge SOC value of the first energy storage device of each collector line and the state of charge SOC value of the second energy storage device, when the power of the battery system of the first energy storage device is negative, it can be determined that the first energy storage device is in a charging state. At this time, the second coefficient of the first energy storage device in the charging mode can be determined by formula (4), wherein formula (4) is as follows, and formula (4) is only an example, and the present disclosure does not limit this:

[0078] Among them, K B_c,i , is the second coefficient of the first energy storage device of the i-th collector in the charging mode.

[0079] When the power of the supercapacitor system of the second energy storage device is negative, it can be determined that the second energy storage device is in the charging mode. At this time, the second coefficient of the second energy storage device in the charging mode can be determined by formula (5), wherein formula (5) is as follows. Formula (5) is only used as an example and is not limited in the present disclosure:

[0080]

[0081] Among them, K S_c,i , is the second coefficient of the second energy storage device of the i-th collector in the charging mode.

[0082] Step 303: Obtain the rated charge and discharge power of the first energy storage device of each collector line, and the rated charge and discharge power of the second energy storage device.

[0083] In the present disclosure, after determining the first coefficient of each energy storage device of each collecting line in the discharge mode and the second coefficient in the charge mode, the rated charge and discharge power of the corresponding energy storage device can be obtained respectively, thereby providing a data basis for determining the maximum charge and discharge power of each energy storage device.

[0084] Step 304, based on the first coefficient corresponding to each energy storage device of each collector line and the rated charge and discharge power, determine the first maximum discharge power of the corresponding first energy storage device and the second maximum discharge power of the corresponding second energy storage device, and based on the second coefficient corresponding to each energy storage device and the rated charge and discharge power, determine the first maximum charging power of the corresponding first energy storage device and the second maximum charging power of the corresponding second energy storage device.

[0085] In the present disclosure, after determining the first coefficient, the second coefficient and the rated charge and discharge power of the first energy storage device of each collector line, the first maximum discharge power and the first maximum charge power of the first energy storage device can be determined based on the first coefficient, the second coefficient and the rated charge and discharge power of the first energy storage device, respectively, using formula (6), wherein formula (6) is as follows, and formula (6) is only an example, and the present disclosure does not limit this:

[0086]

[0087] in, is the first maximum discharge power of the first energy storage device of the i-th collector in the current control period j, is the first maximum charging power of the first energy storage device of the i-th collector in the current control period j, P B,max , is the rated charge and discharge power of the first energy storage device.

[0088] In the present disclosure, after determining the first coefficient, the second coefficient and the rated charge and discharge power of the second energy storage device of each collector line, the second maximum discharge power and the second maximum charge power of the second energy storage device can be determined based on the first coefficient, the second coefficient and the rated charge and discharge power of the second energy storage device, respectively, using formula (7), wherein formula (7) is as follows, formula (7) is only an example, and the present disclosure does not limit this:

[0089]

[0090] in, is the second maximum discharge power of the second energy storage device of the i-th collector in the current control period j, is the second maximum charging power of the second energy storage device of the i-th collector in the current control period j, P S,max , is the rated charge and discharge power of the second energy storage device.

[0091] Step 305, based on the first output power reference value and actual output power of each collector line, and the maximum charge and discharge power of each energy storage device in the corresponding collector line, determine the second output power reference value of each collector line in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period.

[0092] Step 306 : Based on the charge and discharge target powers of the energy storage devices of each collecting line, determine the first target voltage of the first energy storage device of each collecting line and the second target voltage of the second energy storage device of each collecting line.

[0093] Step 307 , controlling the first energy storage device and the second energy storage device of each collector line to operate at corresponding target voltages respectively.

[0094] The specific implementation forms of steps 305 to 307 may refer to the detailed descriptions in other embodiments of the present disclosure, and will not be described in detail here.

[0095] In the embodiment of the present disclosure, after receiving the instruction to smooth the wind power output power, the first output power reference value and the actual output power of each collector line in the wind farm in the current control period, as well as the state of charge SOC values ​​of the first energy storage device and the second energy storage device of each collector line in the current control period are first determined, and based on the state of charge SOC value of the first energy storage device of each collector line and the state of charge SOC value of the second energy storage device, the first coefficient of the corresponding energy storage device in the discharge mode and the second coefficient in the charging mode are respectively determined, and then the rated charge and discharge power of the first energy storage device of each collector line and the rated charge and discharge power of the second energy storage device are obtained, and based on the first coefficient and the rated charge and discharge power corresponding to each energy storage device of each collector line, the first maximum discharge power of the corresponding first energy storage device and the second maximum discharge power of the corresponding second energy storage device are determined. The second maximum discharge power is determined, and based on the second coefficient corresponding to each energy storage device and the rated charge and discharge power, the first maximum charging power of the corresponding first energy storage device and the second maximum charging power of the corresponding second energy storage device are determined; then, based on the first output power reference value and the actual output power of each collector line, and the charge and discharge maximum power of each energy storage device in the corresponding collector line, the second output power reference value of the next control period adjacent to the current control period of each collector line and the charge and discharge target power of the corresponding energy storage device in the current control period are determined respectively; based on the charge and discharge target power of each energy storage device of each collector line, the first target voltage of the first energy storage device of each collector line and the second target voltage of the second energy storage device are determined respectively; finally, the first energy storage device and the second energy storage device of each collector line are controlled to operate at the corresponding target voltages respectively. Therefore, the charge and discharge limit coefficient of each energy storage device is determined based on the SOC value of each energy storage device on each collector line in the wind farm, and the maximum charge and discharge power of the corresponding energy storage device is determined based on the charge and discharge present value coefficient and the rated charge and discharge power of each energy storage device. The charge and discharge target power and target voltage of the corresponding energy storage device are determined based on the current output power reference value of each collector line, the actual output power and the maximum charge and discharge power of each energy storage device on the collector line, and the energy storage device is controlled to operate at the target voltage, thereby improving the stability of wind power output power and the accuracy of hybrid energy storage control.

[0096] Figure 4 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure.

[0097] like Figure 4 As shown, the method includes:

[0098] Step 401, after receiving the instruction for smoothing the wind power output power, determine the first output power reference value and actual output power of each collector in the wind farm in the current control period, and the state of charge SOC value of the first energy storage device and the second energy storage device of each collector in the current control period.

[0099] Step 402 : Based on the state of charge (SOC) value of each energy storage device of each collector line, determine the first maximum charge and discharge power of the corresponding first energy storage device and the second maximum charge and discharge power of the corresponding second energy storage device.

[0100] The specific implementation forms of step 401 to step 402 can refer to the detailed descriptions in other embodiments of the present disclosure, and will not be described in detail here.

[0101] Step 403: determine a power deviation value between a first output power reference value and an actual output power of each collector line.

[0102] In the present disclosure, after determining the maximum charge and discharge power of each energy storage device of each collector line, in order to determine the charge and discharge target power of each energy storage device and the second output power reference value of the collector line in the next control period, the power deviation value between the first output power reference value of each collector line and the actual output power can be first determined by formula (8), wherein formula (8) is as follows, and formula (8) is only an example, and the present disclosure does not limit this:

[0103]

[0104] in, is the power deviation value of the i-th collector in the current control period j, is the first output power reference value of the i-th collector in the current control period j, is the actual output power of the ith collector during the current control period.

[0105] Step 404: low-pass filter the power deviation value to obtain corresponding low-frequency component value and high-frequency component value.

[0106] In the present disclosure, after determining the power deviation value between the first output power reference value of each collector line and the actual output power, the power deviation value can be low-pass filtered by formula (9) to obtain the corresponding low-frequency component value, wherein formula (9) is as follows. Formula (9) is only an example and is not limited in the present disclosure:

[0107]

[0108] in, is the low-frequency component value corresponding to the i-th collector line, is a low-pass filter, s is the Laplace operator, s is a complex number, s=σ+jω, σ is the real part, ω is the imaginary part, and τ is the time constant.

[0109] Next, the corresponding high-frequency component value is determined by using the low-frequency component value and the power deviation value using formula (10), wherein formula (10) is as follows. Formula (10) is only used as an example and is not limited in the present disclosure:

[0110]

[0111] in, is the high frequency component value corresponding to the i-th collector line.

[0112] Step 405, based on the relationship between the low-frequency component value of each collector line and the first maximum charge and discharge power of the first energy storage device of the corresponding collector line, determine the second output power reference value of each collector line in the next control period adjacent to the current control period, and the first charge and discharge target power of the corresponding first energy storage device in the current control period.

[0113] In the present disclosure, after determining the low-frequency component value corresponding to each collector line, when the low-frequency component value is greater than or equal to the first maximum charging power of the corresponding first energy storage device, and less than or equal to the corresponding first maximum discharging power, the first output power reference value of the corresponding collector line can be determined as its second output power reference value, and the low-frequency component value can be determined as the first charging and discharging target power of the corresponding first energy storage device.

[0114] In the present disclosure, after determining the low-frequency component value corresponding to each collector line, when the low-frequency component value is greater than the first maximum discharge power of the corresponding first energy storage device, the second output power reference value of the corresponding collector line can be determined based on the state of charge SOC value of the first energy storage device, and the first maximum discharge power can be determined as the first charging and discharging target power of the corresponding first energy storage device.

[0115] Specifically, when the low-frequency component value is greater than the first maximum discharge power of the corresponding first energy storage device, the second output power reference value of the corresponding collector line can be determined based on the state of charge SOC value of the first energy storage device. When the state of charge SOC value of the first energy storage device is less than the first threshold, the fourth coefficient is calculated based on the difference between the first threshold and the SOC value and the preset third coefficient, and the second output power reference value of the corresponding collector line is determined based on the fourth coefficient, the length of the control period and the first output power reference value of the corresponding collector line.

[0116] The first threshold value may be preset according to actual needs. For example, the first threshold value may be 0.2, which is not limited in the present disclosure.

[0117] The third coefficient can be determined according to actual needs, and the present disclosure does not limit this.

[0118] The fourth coefficient may be a reduction conversion coefficient of the output power reference value of the collector line.

[0119] Further, when the fourth coefficient is calculated based on the difference between the first threshold value and the SOC value and the preset third coefficient, the corresponding fourth coefficient can be determined using formula (11), wherein formula (11) is as follows. Formula (11) is only an example and is not limited in the present disclosure:

[0120] k1(j)=50×(0.2-SOC B,i )×k0+k0, (11)

[0121] In formula (11), k1(j) is the fourth coefficient, the first threshold is 0.2 as an example, the value of the first threshold can be set according to actual needs and is not limited here, and k0 is the third coefficient.

[0122] Then, the second output power reference value of the corresponding collector line is determined based on the fourth coefficient, the control period duration, and the first output power reference value of the corresponding collector line through formula (12), wherein formula (12) is as follows, and formula (12) is only an example, and the present disclosure does not limit this:

[0123]

[0124] in, is the second output power reference value of the next control period of the i-th collector line, ΔT is the control period duration, is the first output power reference value of the i-th collector line.

[0125] Alternatively, when the state of charge SOC value of the first energy storage device is greater than or equal to the first threshold value, the preset third coefficient can be used as the fourth coefficient. At this time, the second output power reference value of the corresponding collector line can be determined directly based on the preset third coefficient, the control period duration and the corresponding first output power reference value of the collector line using formula (13), wherein formula (13) is as follows. Formula (13) is only an example and is not limited in the present disclosure:

[0126]

[0127] Among them, k0 is the third coefficient.

[0128] In the present disclosure, after determining the low-frequency component value corresponding to each collector line, when the low-frequency component value is less than the first maximum charging power of the corresponding first energy storage device, the second output power reference value of the corresponding collector line can be determined based on the state of charge SOC value of the first energy storage device, and the first maximum charging power can be determined as the first charging and discharging target power of the corresponding first energy storage device.

[0129] Specifically, when the low-frequency component value is less than the first maximum charging power of the corresponding first energy storage device, and when the state of charge SOC value of the first energy storage device is less than or equal to the preset second threshold value, the second output power reference value of the corresponding collector line can be determined directly based on the preset third coefficient, the control period duration, and the first output power reference value of the corresponding collector line, using formula (14). Wherein, formula (14) is as follows, formula (14) is only an example, and this disclosure does not limit this:

[0130] The second threshold value may be preset according to actual needs. For example, the second threshold value may be 0.8, which is not limited in the present disclosure.

[0131] Alternatively, when the state of charge SOC value of the second energy storage device is greater than a preset second threshold value, the fifth coefficient can be calculated based on the difference between the SOC value and the second threshold value and the preset third coefficient, and the second output power reference value of the corresponding collector line can be determined based on the fifth coefficient, the length of the control period and the first output power reference value of the corresponding collector line.

[0132] The fifth coefficient may be a rising conversion coefficient of the output power reference value of the collector line.

[0133] Further, when the fifth coefficient is calculated based on the difference between the SOC value of the second energy storage device and the second threshold value and the preset third coefficient, the fifth coefficient can be calculated using formula (15), wherein formula (15) is as follows, and formula (15) is only an example, and the present disclosure does not limit this:

[0134] k2(j)=50×(SOC B,i -0.8)×k0+k0, (15)

[0135] Among them, k2(j) is the fifth coefficient, and the second threshold in formula (15) is illustrated by taking 0.8 as an example.

[0136] Then, the second output power reference value of the corresponding collector line is determined based on the fifth coefficient, the control period duration, and the first output power reference value of the corresponding collector line through formula (16). Wherein, formula (16) is as follows, and formula (16) is only an example, and the present disclosure does not limit this:

[0137]

[0138] Step 406 , based on the relationship between the high frequency component value of each collecting line and the second maximum charge and discharge power of the second energy storage device of the corresponding collecting line, determine the second charge and discharge target power of the second energy storage device of each collecting line in the current control period.

[0139] In the present disclosure, after determining the high-frequency component value corresponding to each collecting line, when the high-frequency component value is greater than or equal to the second maximum charging power of the corresponding second energy storage device, and less than or equal to the corresponding second maximum discharging power, the high-frequency component value is determined as the second charging and discharging target power of the corresponding second energy storage device.

[0140] In the present disclosure, after determining the high frequency component value corresponding to each collector line, when the high frequency component value is greater than the second maximum discharge power of the corresponding second energy storage device, the second maximum discharge power is determined as the second charge and discharge target power of the corresponding second energy storage device.

[0141] In the present disclosure, after determining the high-frequency component value corresponding to each collecting line, when the high-frequency component value is less than the second maximum charging power of the corresponding second energy storage device, the second maximum charging power is determined as the second charging and discharging target power of the corresponding second energy storage device.

[0142] Step 407 : determining a first target voltage of a first energy storage device and a second target voltage of a second energy storage device of each collecting line based on the charging and discharging target powers of each energy storage device of each collecting line.

[0143] Step 408 , controlling the first energy storage device and the second energy storage device of each collector line to operate at corresponding target voltages respectively.

[0144] The specific implementation forms of step 407 to step 408 can refer to the detailed descriptions in other embodiments of the present disclosure, and will not be described in detail here.

[0145] In the embodiment of the present disclosure, after receiving the instruction for smoothing the wind power output power, the first output power reference value and the actual output power of each collector line in the wind farm in the current control period, as well as the state of charge SOC values ​​of the first energy storage device and the second energy storage device of each collector line in the current control period are first determined, and based on the state of charge SOC value of each energy storage device of each collector line, the first maximum charge and discharge power of the corresponding first energy storage device and the second maximum charge and discharge power of the corresponding second energy storage device are respectively determined, and then the power deviation value between the first output power reference value and the actual output power of each collector line is determined, and the power deviation value is low-pass filtered to obtain the corresponding low-frequency component value and high-frequency component value, and then based on the low-frequency component value of each collector line, the corresponding collector line is compared with the power deviation value of the first output power reference value and the actual output power of each collector line. The relationship between the first charge and discharge maximum powers of the first energy storage device is determined to determine the second output power reference value of the next control period adjacent to the current control period of each collecting line, and the first charge and discharge target power of the corresponding first energy storage device in the current control period, and based on the high-frequency component value of each collecting line and the relationship between the second charge and discharge maximum powers of the second energy storage device of the corresponding collecting line, the second charge and discharge target power of the second energy storage device of each collecting line in the current control period is determined, and finally, based on the charge and discharge target powers of each energy storage device of each collecting line, the first target voltage of the first energy storage device of each collecting line and the second target voltage of the second energy storage device are determined respectively, and the first energy storage device and the second energy storage device of each collecting line are controlled to operate at the corresponding target voltages respectively. Therefore, after determining the maximum charge and discharge power of each energy storage device in each collector line in the wind farm, the output power reference value of the current control period of each collector line and the power deviation value of the actual output power are low-pass filtered to determine the corresponding low-frequency component value and high-frequency component value, and based on the relationship between the low-frequency component value of each collector line and the maximum charge and discharge power of the electrochemical energy storage device, the output power reference value of the next control period of the corresponding collector line and the charge and discharge target power of the electrochemical energy storage device in the current control period are determined, and based on the relationship between the high-frequency component value of each collector line and the charge and discharge maximum power of the supercapacitor energy storage device, the charge and discharge target power of the corresponding supercapacitor energy storage device in the current control period is determined, and then the target voltage of each energy storage device is determined, and it is controlled to work at the target voltage, thereby improving the accuracy and reliability of the hybrid energy storage control used to smooth the wind power output power.

[0146] Figure 5 A flow chart of a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure.

[0147] like Figure 5 As shown, the method includes:

[0148] Step 501, after receiving the instruction to smooth the wind power output power, determine the first output power reference value and actual output power of each collector in the wind farm in the current control period, and the state of charge SOC value of the first energy storage device and the second energy storage device of each collector in the current control period.

[0149] Step 502 : Based on the state of charge (SOC) value of each energy storage device of each collector line, determine the first maximum charge and discharge power of the corresponding first energy storage device and the second maximum charge and discharge power of the corresponding second energy storage device.

[0150] Step 503, based on the first output power reference value and actual output power of each collector line, and the maximum charge and discharge power of each energy storage device in the corresponding collector line, determine the second output power reference value of each collector line in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period.

[0151] The specific implementation forms of steps 501 to 503 can refer to the detailed descriptions in other embodiments of the present disclosure, and will not be described in detail here.

[0152] Step 504, obtaining the three-phase voltage measurement value of each collector line and the three-phase current measurement value of each energy storage device in the collector line.

[0153] In the present disclosure, after determining the charging and discharging target power of each energy storage device in each collecting line, a grid-based control tracking strategy can be used to track the charging and discharging target power so that each energy storage device achieves the corresponding charging and discharging target power. At this time, the three-phase voltage measurement values ​​of each collecting line and the three-phase current measurement values ​​of each energy storage device in the collecting line can be first obtained.

[0154] It should be noted that the present disclosure adopts a grid-based control tracking strategy to track the charging and discharging target power so that each energy storage device can achieve the corresponding charging and discharging target power. Figure 6 The transformation controller shown is used to perform tracking determination. Figure 6 A schematic diagram of the structure of a conversion controller in a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure, such as Figure 6 As shown, it mainly includes a phase-locked loop phase angle calculation module 601, a current outer loop calculation module 602 and a current inner loop calculation module 603, which is not limited in the present disclosure.

[0155] Step 505, convert the three-phase voltage measurement values ​​of each collector line to obtain the corresponding first voltage component and second voltage component after conversion, and convert the three-phase current measurement values ​​of each energy storage device in the collector line to obtain the corresponding first current component and second current component after conversion.

[0156] The first voltage component may be a q-axis voltage component of the three-phase voltage measurement value in the dq coordinate system, and the second voltage component may be a d-axis voltage component.

[0157] The first current component may be a q-axis current component of the three-phase current measurement value in the dq coordinate system, and the second current component may be a d-axis current component.

[0158] In the present disclosure, after obtaining the three-phase voltage measurement value of each collector line, the three-phase voltage measurement value can be input into the phase angle calculation module of the phase-locked loop, and the three-phase voltage measurement value is substituted into the dq coordinate transformation through the preset phase θ to determine the corresponding first voltage component and the second voltage component, wherein, when the three-phase voltage measurement value is substituted into the dq coordinate transformation, formula (17) can be used for conversion, wherein formula (17) is as follows, formula (17) is only an example, and the present disclosure does not limit this:

[0159] Among them, T abC-dq , is the conversion coefficient of the three-phase voltage to the voltage in the dq coordinate system, abc, is the three-phase voltage coordinate system, u oq , is the first voltage component, u od , is the second voltage component, u oa 、u ob 、u oc , are the coordinate axis voltage components corresponding to the three-phase voltage measurement values ​​in the three-phase voltage coordinate system.

[0160] Among them, T abc-dq , can be shown in the following formula (18), wherein formula (18) is only an example and is not limited in this disclosure:

[0161] Among them, θ in formula (18) is the preset phase.

[0162] In the present disclosure, after obtaining the three-phase current measurement values ​​of each energy storage device in each collector line, the three-phase current measurement values ​​can also be substituted into the dq coordinate system for conversion to obtain the corresponding first current component and second current component.

[0163] Step 506: Determine the frequency and phase angle of the corresponding collector line based on the first voltage component of each collector line.

[0164] In the present disclosure, after determining the first voltage component corresponding to the three-phase voltage measurement value of each collector line, the first voltage component can be substituted into the proportional integral calculation formula (19) through the phase-locked loop phase angle calculation module to determine the frequency of the corresponding collector line, wherein the formula (19) is as follows. The formula (19) is only an example and is not limited to this in the present disclosure:

[0165]

[0166] Among them, ω is the collector frequency, K p_PLL , is the proportional gain, K i_PLL , is the integral gain, and s, is the complex frequency variable in the Laplace transform.

[0167] Then, the frequency is integrated to calculate the phase angle of the collector line. The integral formula is shown in formula (20), where formula (20) is only an example and is not limited in the present disclosure:

[0168] It should be noted that if the determined first current component is not close to 0, that is, when the first current component is not equal to a preset range (which can be determined as needed), it is necessary to substitute the calculated phase angle of the collector into formula (17) to formula (20), recalculate the frequency and phase angle of the collector until the first voltage component is close to 0, and lock the frequency and phase angle of the collector, such as Figure 7 As shown, Figure 7 A schematic diagram of a phase-locked loop calculation process provided in an embodiment of the present disclosure, Figure 7 In the equation, PI is the abbreviation of proportional integral (PI), where: Figure 7 This is only an example and the present disclosure is not limited thereto.

[0169] Step 507 , based on the first voltage component and the second voltage component of each collector line and the first current component and the second current component of each energy storage device in the collector line, determine the power measurement value of the corresponding energy storage device in each collector line in the current control period.

[0170] The power measurement value may include an active power measurement value and a reactive power measurement value.

[0171] In the present disclosure, after determining the frequency and phase angle of each collector line in the wind farm, the current outer loop calculation module can firstly be used to determine the power measurement value of the corresponding energy storage device in each collector line in the current control period based on the first voltage component and the second voltage component of each collector line and the first current component and the second current component of each energy storage device in the collector line by using formula (21), wherein formula (21) is as follows, formula (21) is only an example, and the present disclosure does not limit this:

[0172]

[0173] Among them, P B / S,i , is the measured active power value of the first energy storage device or the second energy storage device of the i-th collector, Q B / S,i , is the reactive power measurement value of the first energy storage device or the second energy storage device, i q , is the first current component corresponding to the q-axis of the three-phase current measurement value of each energy storage device in the dq coordinate system, i d , is the second current component corresponding to the d-axis.

[0174] Step 508 , based on the power measurement value corresponding to each energy storage device in each collecting line and the corresponding charging and discharging target power, respectively determine the first target current of the first energy storage device and the second target current of the second energy storage device of each collecting line.

[0175] Among them, the first target current is the current control target value of the PCC point between the first energy storage device and the collector in the dq coordinate system, which may include the current control target values ​​corresponding to the d-axis and the q-axis respectively.

[0176] Among them, PCC is the abbreviation of Point of Common Coupling (PCC). For a wind turbine set equipped with an energy storage device, the PCC point may refer to the common connection point where the converter circuit breaker outlet or the energy storage device circuit breaker outlet is connected to the low-voltage side of the box transformer.

[0177] Among them, the second target current is the current control target value of the PCC point between the first energy storage device and the collector in the dq coordinate system, which may include the current control target values ​​corresponding to the d-axis and the q-axis respectively.

[0178] In the present disclosure, after determining the power measurement value of the energy storage device corresponding to each collector line in the current control period, the current outer loop calculation module uses the proportional integral formula (22) to determine the first target current of the first energy storage device of each collector line and the second target current of the second energy storage device based on the power measurement value corresponding to each energy storage device of each collector line and the corresponding charge and discharge target power, respectively, wherein the formula (22) is as follows, and the formula (22) is only an example, and the present disclosure does not limit this:

[0179] in, is the current control target value corresponding to the d-axis of the first target current or the second target current, is the current control target value corresponding to the q axis, K p_PQ , is the proportional gain, K i_PQ , is the integral gain, is the charging and discharging target power of the first energy storage device or the second energy storage device, It is the reactive power of the first energy storage device or the second energy storage device in the current control period.

[0180] Step 509, based on the target current, first current component and second current component corresponding to each energy storage device in each collector line, and the first voltage component, second voltage component and frequency of the corresponding collector line, respectively determine the first target voltage of the first energy storage device in each collector line and the second target voltage of the second energy storage device.

[0181] In the present disclosure, after determining the first target current of the first energy storage device of each collector line and the second target current of the second energy storage device, the target current of each energy storage device can be firstly dropped into the proportional integral formula (23) through the current inner loop calculation module, and the voltage value corresponding to the current loop is determined based on the first current component and the second current component of each energy storage device, wherein the formula (23) is as follows, and the formula (23) is only an example, and the present disclosure does not limit this:

[0182]

[0183] Among them, u iq , is the voltage value under the q axis corresponding to the current loop, u id , is the voltage value under the d-axis corresponding to the current loop, K p_c , is the proportional gain, K i_c , is the integral gain, are the current control target value corresponding to the q-axis of the first target current or the second target current, and the current control target value corresponding to the d-axis, respectively. q 、i d , are the first current component and the second current component respectively.

[0184] Then, by introducing the dq axis cross-influence term, based on the first voltage component and the second voltage component and the frequency of each collector line, the voltage control target value of the inverter dq axis of each energy storage device is obtained using formula (24), wherein formula (24) is as follows, formula (24) is only an example, and the present disclosure does not limit this:

[0185]

[0186] in, is the voltage control target value of the inverter q axis, is the voltage control target value of the inverter d axis, u oq 、u od , respectively the first voltage component and the second voltage component, ω, is the frequency, i q 、id , are the first current component and the second current component respectively.

[0187] Finally, the voltage control target values ​​corresponding to the dq axes of the inverter are substituted into the dq coordinate inverse transformation formula (25) to determine the target voltage of each energy storage device in each collector line, wherein formula (25) is as follows. Formula (25) is only an example and is not limited to this in the present disclosure:

[0188] in, are the three-phase voltage target components in the target voltage, are the voltage control target values ​​corresponding to the inverter dq cycles, T dq-abc , which is the coefficient for converting the dq axis voltage into three-phase voltage.

[0189] Among them, T dq-abc , which can be shown as the following formula (26). Formula (26) is only an example and is not limited in this disclosure:

[0190] Step 510: Control the first energy storage device and the second energy storage device of each collector line to operate at corresponding target voltages respectively.

[0191] The specific implementation form of step 510 can refer to the detailed description in other embodiments of the present disclosure, and will not be described in detail here.

[0192] Combine the following Figure 8 , the specific structure of the conversion controller of the hybrid energy storage control method for smoothing wind power output power provided by the present disclosure is illustrated by way of example, Figure 8 A schematic diagram of the structure of a conversion controller in a hybrid energy storage control method for smoothing wind power output power provided in an embodiment of the present disclosure, such as Figure 8 As shown, it mainly includes a phase-locked loop phase angle calculation module 10, a current outer loop calculation module 11 and a current inner loop calculation module 12, wherein, Figure 8 The 4 / 5 modules are the first energy storage device or the second energy storage device in the collector line, and SPWM is the abbreviation of Sinusoidal Pulse Width Modulation (SPWM), which is not limited in the present disclosure.

[0193] The input of the phase-locked loop phase angle calculation module 10 is the three-phase voltage measurement value of the collector line, and the output is the frequency and phase angle of the collector line.

[0194] The current outer loop calculation module 11 includes a power calculation module 11-1, the input of which is the three-phase voltage measurement value of the collector and the three-phase current measurement value of each energy storage device, and also includes a dq axis current outer loop PI calculation module 11-2. The input of the dq axis current outer loop PI calculation module 11-2 is the three-phase voltage measurement value u of the collector. oabc , the three-phase current measurement value i of each energy storage device abc , Charge and discharge target power And the reactive power of each energy storage device The output is the current control target value i of the dq axis of each energy storage device PCC point dq * .

[0195] The current inner loop calculation module 12 includes proportional integral calculation modules 12-1 and 12-2, dq axis coordinate transformation 12-3 and dq axis coordinate inverse transformation 12-4. The input of the current inner loop calculation module 12 is the current control target value i output by the current outer loop calculation module 11. dq * , the output is the target voltage of each energy storage device in the collector.

[0196] In the embodiment of the present disclosure, after receiving the instruction for smoothing the wind power output power, the first output power reference value and the actual output power of each collector line in the wind farm in the current control period, as well as the state of charge SOC values ​​of the first energy storage device and the second energy storage device of each collector line in the current control period are first determined, and based on the state of charge SOC value of each energy storage device of each collector line, the first maximum charge and discharge power of the corresponding first energy storage device and the second maximum charge and discharge power of the corresponding second energy storage device are respectively determined, and then based on the first output power reference value and the actual output power of each collector line, as well as the maximum charge and discharge power of each energy storage device in the corresponding collector line, the second output power reference value of the next control period adjacent to the current control period of each collector line and the charge and discharge target power of the corresponding energy storage device in the current control period are respectively determined, and the three-phase voltage measurement values ​​of each collector line and the three-phase current measurement values ​​of each energy storage device in the collector line are obtained, the three-phase voltage measurement values ​​of each collector line are converted to obtain the first voltage component and the second voltage component corresponding to the converted value, and the three-phase current measurement values ​​of each energy storage device in the ... The three-phase current measurement values ​​of the energy storage device are converted to obtain the first current component and the second current component corresponding to the conversion, and then the frequency and phase angle of the corresponding collector are determined based on the first voltage component of each collector, and the power measurement value of the corresponding energy storage device in each collector during the current control period is determined based on the first voltage component and the second voltage component of each collector, and the first current component and the second current component of each energy storage device in the collector, and then the first target current of the first energy storage device of each collector and the second target current of the second energy storage device are determined based on the power measurement value corresponding to each energy storage device in each collector, and the corresponding charge and discharge target power, and finally the first target voltage of the first energy storage device in each collector and the second target voltage of the second energy storage device are determined based on the target current, the first current component and the second current component corresponding to each energy storage device in each collector, and the first voltage component, the second voltage component and the frequency of the corresponding collector, and the first energy storage device and the second energy storage device of each collector are controlled to operate at the corresponding target voltages. Therefore, after determining the charging and discharging target power of each energy storage device of each collecting line in the wind farm, the charging and discharging target power is tracked through the grid-following tracking strategy, thereby realizing the control of the energy storage device in the wind farm and improving the stability and reliability of the discharge output power.

[0197] In order to implement the above embodiment, the embodiment of the present disclosure further proposes a hybrid energy storage control device for smoothing wind power output power.

[0198] Fig. 9 A schematic structural diagram of a hybrid energy storage control device for smoothing wind power output power provided in an embodiment of the present disclosure.

[0199] like Fig. 9 As shown, the hybrid energy storage control device 900 for smoothing wind power output power may include:

[0200] The first determination module 901 is used to determine the first output power reference value and the actual output power of each collector line in the wind farm in the current control period after receiving the instruction of smoothing the wind power output power, and the state of charge SOC value of the first energy storage device and the second energy storage device of each collector line in the current control period respectively;

[0201] A second determination module 902 is used to determine a first maximum charge / discharge power of a corresponding first energy storage device and a second maximum charge / discharge power of a corresponding second energy storage device based on the state of charge SOC value of each energy storage device of each collector line;

[0202] The third determination module 903 is used to determine the second output power reference value of each collector line in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period, based on the first output power reference value and the actual output power of each collector line, and the maximum charge and discharge power of each energy storage device in the corresponding collector line;

[0203] A fourth determination module 904 is used to determine a first target voltage of a first energy storage device of each collector line and a second target voltage of a second energy storage device of each collector line based on the charge and discharge target powers of each energy storage device of each collector line;

[0204] The control module 905 is used to control the first energy storage device and the second energy storage device of each collector line to operate at corresponding target voltages respectively.

[0205] Optionally, the second determining module 902 is specifically configured to:

[0206] Based on the state of charge SOC value of the first energy storage device of each collector line and the state of charge SOC value of the second energy storage device, respectively determine a first coefficient of the corresponding energy storage device in a discharge mode and a second coefficient in a charge mode;

[0207] Obtaining the rated charge and discharge power of the first energy storage device and the rated charge and discharge power of the second energy storage device of each collector line;

[0208] Based on the first coefficient corresponding to each energy storage device of each collecting line and the rated charge and discharge power, the first maximum discharge power of the corresponding first energy storage device and the second maximum discharge power of the corresponding second energy storage device are determined, and based on the second coefficient corresponding to each energy storage device and the rated charge and discharge power, the first maximum charging power of the corresponding first energy storage device and the second maximum charging power of the corresponding second energy storage device are determined.

[0209] Optionally, the third determining module 903 is specifically configured to:

[0210] Determine a power deviation value between a first output power reference value and an actual output power of each collector line;

[0211] The power deviation value is low-pass filtered to obtain the corresponding low-frequency component value and high-frequency component value.

[0212] Based on the relationship between the low-frequency component value of each collector line and the first maximum charge and discharge power of the first energy storage device of the corresponding collector line, determine the second output power reference value of each collector line in the next control period adjacent to the current control period, and the first charge and discharge target power of the corresponding first energy storage device in the current control period;

[0213] Based on the relationship between the high frequency component value of each collecting line and the second maximum charge and discharge power of the second energy storage device of the corresponding collecting line, the second charge and discharge target power of the second energy storage device of each collecting line in the current control period is determined.

[0214] Optionally, the third determining module 903 is further used for any of the following:

[0215] When the low-frequency component value is greater than or equal to the first maximum charging power of the corresponding first energy storage device, and less than or equal to the corresponding first maximum discharging power, the first output power reference value of the corresponding collector is determined as its second output power reference value, and the low-frequency component value is determined as the first charging and discharging target power of the corresponding first energy storage device;

[0216] When the low-frequency component value is greater than the first maximum discharge power of the corresponding first energy storage device, a second output power reference value of the corresponding collector is determined based on the state of charge SOC value of the first energy storage device, and the first maximum discharge power is determined as the first charge and discharge target power of the corresponding first energy storage device;

[0217] When the low-frequency component value is less than the first maximum charging power of the corresponding first energy storage device, the second output power reference value of the corresponding collector is determined based on the state of charge SOC value of the first energy storage device, and the first maximum charging power is determined as the first charging and discharging target power of the corresponding first energy storage device.

[0218] Optionally, the third determining module 903 is further used for any of the following:

[0219] When the state of charge SOC value of the first energy storage device is less than the first threshold value, a fourth coefficient is calculated based on the difference between the first threshold value and the SOC value and a preset third coefficient, and a second output power reference value of the corresponding collector line is determined based on the fourth coefficient, the control period duration and the first output power reference value of the corresponding collector line;

[0220] When the state of charge SOC value of the first energy storage device is greater than or equal to the first threshold, the second output power reference value of the corresponding collector is determined based on the preset third coefficient, the control period duration and the first output power reference value of the corresponding collector.

[0221] Optionally, the third determining module 903 is further used for any of the following:

[0222] When the state of charge SOC value of the first energy storage device is less than or equal to a preset second threshold value, determining a second output power reference value of the corresponding collector line based on a preset third coefficient, a control period duration, and a first output power reference value of the corresponding collector line;

[0223] When the state of charge SOC value of the second energy storage device is greater than the preset second threshold value, the fifth coefficient is calculated based on the difference between the SOC value and the second threshold value and the preset third coefficient, and the second output power reference value of the corresponding collector line is determined based on the fifth coefficient, the control period duration and the first output power reference value of the corresponding collector line.

[0224] Optionally, the third determining module 903 is further configured to:

[0225] When the high-frequency component value is greater than or equal to the second maximum charging power of the corresponding second energy storage device and less than or equal to the corresponding second maximum discharging power, the high-frequency component value is determined as the second charging and discharging target power of the corresponding second energy storage device;

[0226] When the high-frequency component value is greater than the second maximum discharge power of the corresponding second energy storage device, determining the second maximum discharge power as the second charge and discharge target power of the corresponding second energy storage device;

[0227] When the high-frequency component value is less than the second maximum charging power of the corresponding second energy storage device, the second maximum charging power is determined as the second charging and discharging target power of the corresponding second energy storage device.

[0228] Optionally, the fourth determining module 904 is specifically configured to:

[0229] Obtaining three-phase voltage measurement values ​​of each collector line and three-phase current measurement values ​​of each energy storage device in the collector line;

[0230] Convert the three-phase voltage measurement value of each collector line to obtain the first voltage component and the second voltage component corresponding to the conversion, and convert the three-phase current measurement value of each energy storage device in the collector line to obtain the first current component and the second current component corresponding to the conversion;

[0231] Based on the first voltage component of each collector line, determining the frequency and phase angle of the corresponding collector line;

[0232] Determine a power measurement value of a corresponding energy storage device in each collecting line in a current control period based on a first voltage component and a second voltage component of each collecting line and a first current component and a second current component of each energy storage device in the collecting line;

[0233] Based on the power measurement value corresponding to each energy storage device in each collecting line and the corresponding charge and discharge target power, respectively determine a first target current of the first energy storage device of each collecting line and a second target current of the second energy storage device;

[0234] Based on the target current, first current component and second current component respectively corresponding to each energy storage device in each collecting line, and the first voltage component, second voltage component and frequency of the corresponding collecting line, the first target voltage of the first energy storage device in each collecting line and the second target voltage of the second energy storage device are determined respectively.

[0235] The functions and specific implementation principles of the above modules in the embodiments of the present disclosure can be referred to the above method embodiments, and will not be repeated here.

[0236] In the present disclosure, after receiving the instruction for smoothing the wind power output power, the first output power reference value and the actual output power of each collector in the wind farm in the current control period, as well as the state of charge SOC values ​​of the first energy storage device and the second energy storage device of each collector in the current control period are first determined, and based on the state of charge SOC value of each energy storage device of each collector, the first maximum charge and discharge power of the corresponding first energy storage device and the second maximum charge and discharge power of the corresponding second energy storage device are respectively determined, and then based on the first output power reference value and the actual output power of each collector, as well as the maximum charge and discharge power of each energy storage device in the corresponding collector, the second output power reference value of the next control period adjacent to the current control period of each collector and the charge and discharge target power of the corresponding energy storage device in the current control period are respectively determined, and then based on the charge and discharge target power of each energy storage device of each collector, the first target voltage of the first energy storage device of each collector and the second target voltage of the second energy storage device are respectively determined, and finally the first energy storage device and the second energy storage device of each collector are controlled to operate at the corresponding target voltages respectively. Therefore, by determining the target charging and discharging power of the corresponding energy storage device based on the output power reference value and actual output power of each collector line in the wind farm and the SOC value of each energy storage device in the collector line, and then determining the target voltage of the corresponding energy storage device based on the charge and discharge target power, and operating at the target voltage, the volatility of wind power output power is effectively reduced, the stability of wind power output power is improved, and the reliability of hybrid energy storage control used to smooth wind power output power is improved.

[0237] Fig.10 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown.

[0238] Fig.10 The electronic device 12 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0239] like Fig.10As shown, the electronic device 12 is presented in the form of a general-purpose computing device. The components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a memory 28, and a bus 18 connecting different system components (including the memory 28 and the processing unit 16). The bus 18 represents one or more of several types of bus structures, including a memory bus or a memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any bus structure in a variety of bus structures. For example, these architectures include, but are not limited to, an Industry Standard Architecture (Industry Standard Architecture; hereinafter referred to as: ISA) bus, a Micro Channel Architecture (Micro Channel Architecture; hereinafter referred to as: MCA) bus, an enhanced ISA bus, a Video Electronics Standards Association (Video Electronics Standards Association; hereinafter referred to as: VESA) local bus, and a Peripheral Component Interconnection (Peripheral Component Interconnection; hereinafter referred to as: PCI) bus.

[0240] The electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0241] The memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Fig.10 Not shown, often called a "hard drive").

[0242] although Fig.10Not shown in the figure, a disk drive for reading and writing a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing a removable non-volatile optical disk (e.g., a Compact Disc Read Only Memory (hereinafter referred to as: CD-ROM), a Digital Video Disc Read Only Memory (hereinafter referred to as: DVD-ROM) or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the various embodiments of the present disclosure.

[0243] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28, such program modules 42 including but not limited to an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described in the present disclosure.

[0244] The electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), may also communicate with one or more devices that enable the human body to interact with the electronic device 12, and / or communicate with any device that enables the electronic device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through an input / output (I / O) interface 22. In addition, the electronic device 12 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 20. As shown, the network adapter 20 communicates with other modules of the electronic device 12 through a bus 18. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0245] The processing unit 16 executes various functional applications and parameter information determination by running the program stored in the memory 28, for example, implementing the hybrid energy storage control method for smoothing wind power output power mentioned in the above embodiment.

[0246] In order to implement the above embodiments, the present disclosure also proposes a non-temporary computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the hybrid energy storage control method for smoothing wind power output power proposed in the above embodiments of the present disclosure is implemented.

[0247] In order to implement the above embodiments, the present disclosure further proposes a computer program product. When the instruction processor in the computer program product is executed, the hybrid energy storage control method for smoothing wind power output power proposed in the above embodiments of the present disclosure is executed.

[0248] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0249] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0250] It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0251] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0252] It should be understood that the various parts of the present disclosure can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0253] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0254] In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0255] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0256] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0257] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A hybrid energy storage control method for smoothing wind power output power, characterized in that: include: After receiving the instruction to smooth the wind power output power, determine the first output power reference value and the actual output power of each collector line in the wind farm in the current control period, and the state of charge SOC value of the first energy storage device and the second energy storage device of each collector line in the current control period; Based on the state of charge SOC value of each of the energy storage devices of each of the collecting lines, respectively determine a first maximum charge and discharge power of the corresponding first energy storage device and a second maximum charge and discharge power of the corresponding second energy storage device; Based on the first output power reference value and actual output power of each of the collector lines, and the maximum charge and discharge power of each energy storage device in the corresponding collector line, respectively determine the second output power reference value of each of the collector lines in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period; Based on the charge and discharge target powers of the energy storage devices of each of the collecting lines, respectively determining a first target voltage of the first energy storage device of each of the collecting lines and a second target voltage of the second energy storage device; The first energy storage device and the second energy storage device of each collecting line are controlled to operate at corresponding target voltages respectively.

2. The method according to claim 1, characterized in that Based on the state of charge SOC value of each of the energy storage devices of each of the collecting lines, respectively determining a first maximum charge and discharge power of the corresponding first energy storage device and a second maximum charge and discharge power of the corresponding second energy storage device, including: Based on the state of charge SOC value of the first energy storage device and the state of charge SOC value of the second energy storage device of each of the collecting lines, respectively determine a first coefficient of the corresponding energy storage device in a discharge mode and a second coefficient in a charge mode; Obtaining the rated charge and discharge power of the first energy storage device and the rated charge and discharge power of the second energy storage device of each of the collector lines; Based on the first coefficient corresponding to each of the energy storage devices of each of the collecting lines and the rated charge and discharge power, the first maximum discharge power of the corresponding first energy storage device and the second maximum discharge power of the corresponding second energy storage device are determined, and based on the second coefficient corresponding to each of the energy storage devices and the rated charge and discharge power, the first maximum charging power of the corresponding first energy storage device and the second maximum charging power of the corresponding second energy storage device are determined.

3. The method according to claim 1, characterized in that The method of determining the second output power reference value of each collector line in the next control period adjacent to the current control period and the charge and discharge target power of the corresponding energy storage device in the current control period based on the first output power reference value and the actual output power of each collector line and the maximum charge and discharge power of each energy storage device in the corresponding collector line respectively includes: Determining a power deviation value between a first output power reference value and an actual output power of each of the collector lines; The power deviation value is low-pass filtered to obtain a corresponding low-frequency component value and a high-frequency component value. Based on the relationship between the low-frequency component value of each of the collecting lines and the first maximum charge and discharge power of the first energy storage device of the corresponding collecting line, determine the second output power reference value of each of the collecting lines in the next control period adjacent to the current control period, and the first charge and discharge target power of the corresponding first energy storage device in the current control period; Based on the relationship between the high frequency component value of each collecting line and the second maximum charge and discharge power of the second energy storage device of the corresponding collecting line, the second charge and discharge target power of the second energy storage device of each collecting line in the current control period is determined.

4. The method according to claim 3, characterized in that The determining of the second output power reference value of each of the collecting lines in the next control period adjacent to the current control period and the first charge and discharge target power of the corresponding first energy storage device in the current control period based on the relationship between the low-frequency component value of each of the collecting lines and the first charge and discharge maximum power of the first energy storage device of the corresponding collecting line comprises any one of the following: When the low-frequency component value is greater than or equal to the first maximum charging power of the corresponding first energy storage device, and less than or equal to the corresponding first maximum discharging power, the first output power reference value of the corresponding collector is determined as its second output power reference value, and the low-frequency component value is determined as the first charging and discharging target power of the corresponding first energy storage device; In the case where the low-frequency component value is greater than the first maximum discharge power of the corresponding first energy storage device, determining a second output power reference value of the corresponding collector based on the state of charge SOC value of the first energy storage device, and determining the first maximum discharge power as the first charge and discharge target power of the corresponding first energy storage device; When the low-frequency component value is less than the first maximum charging power of the corresponding first energy storage device, a second output power reference value of the corresponding collector is determined based on the state of charge SOC value of the first energy storage device, and the first maximum charging power is determined as the first charging and discharging target power of the corresponding first energy storage device.

5. The method according to claim 4, characterized in that When the low-frequency component value is greater than the first maximum discharge power of the corresponding first energy storage device, determining the second output power reference value of the corresponding collector line based on the state of charge SOC value of the first energy storage device includes any of the following: When the state of charge SOC value of the first energy storage device is less than a first threshold value, a fourth coefficient is calculated based on the difference between the first threshold value and the SOC value and a preset third coefficient, and a second output power reference value of the corresponding collector line is determined based on the fourth coefficient, the control period duration and the first output power reference value of the corresponding collector line; When the state of charge SOC value of the first energy storage device is greater than or equal to the first threshold, the second output power reference value of the corresponding collector line is determined based on a preset third coefficient, a control period duration and a first output power reference value of the corresponding collector line.

6. The method according to claim 4, characterized in that When the low-frequency component value is less than the first maximum charging power of the corresponding first energy storage device, determining the second output power reference value of the corresponding collector line based on the state of charge SOC value of the first energy storage device includes any of the following: When the state of charge SOC value of the first energy storage device is less than or equal to a preset second threshold value, determining a second output power reference value of the corresponding collector line based on a preset third coefficient, a control period duration, and a first output power reference value of the corresponding collector line; When the state of charge SOC value of the second energy storage device is greater than a preset second threshold value, a fifth coefficient is calculated based on the difference between the SOC value and the second threshold value and a preset third coefficient, and the second output power reference value of the corresponding collector line is determined based on the fifth coefficient, the control period duration and the first output power reference value of the corresponding collector line.

7. The method according to claim 3, characterized in that The determining of the second charge and discharge target power of the second energy storage device of each of the collecting lines in the current control period based on the relationship between the high-frequency component value of each of the collecting lines and the second maximum charge and discharge power of the second energy storage device of the corresponding collecting line comprises any one of the following: When the high-frequency component value is greater than or equal to the second maximum charging power of the corresponding second energy storage device and less than or equal to the corresponding second maximum discharging power, the high-frequency component value is determined as the second charging and discharging target power of the corresponding second energy storage device; In a case where the high-frequency component value is greater than a second maximum discharge power of the corresponding second energy storage device, determining the second maximum discharge power as a second charge and discharge target power of the corresponding second energy storage device; When the high-frequency component value is less than the second maximum charging power of the corresponding second energy storage device, the second maximum charging power is determined as the second charging and discharging target power of the corresponding second energy storage device.

8. The method according to claim 1, characterized in that The method of determining the first target voltage of the first energy storage device of the corresponding collector line and the second target voltage of the second energy storage device based on the charge and discharge target power of each energy storage device of each collector line comprises: Obtaining the three-phase voltage measurement value of each of the collector lines and the three-phase current measurement value of each energy storage device in the collector line; Converting the three-phase voltage measurement value of each of the collector lines to obtain the first voltage component and the second voltage component corresponding to the conversion, and converting the three-phase current measurement value of each energy storage device in the collector line to obtain the first current component and the second current component corresponding to the conversion; Based on the first voltage component of each of the collector lines, determining the frequency and phase angle of the corresponding collector line; Determine the power measurement value of the corresponding energy storage device in each of the collecting lines during the current control period based on the first voltage component and the second voltage component of each of the collecting lines and the first current component and the second current component of each of the energy storage devices in the collecting lines; Based on the power measurement value corresponding to each of the energy storage devices in each of the collecting lines and the corresponding charge and discharge target power, respectively determine the first target current of the first energy storage device of each of the collecting lines and the second target current of the second energy storage device; Based on the target current, first current component and second current component respectively corresponding to each energy storage device in each collecting line, and the first voltage component, second voltage component and frequency of the corresponding collecting line, the first target voltage of the first energy storage device in each collecting line and the second target voltage of the second energy storage device are determined respectively.

9. A hybrid energy storage control device for smoothing wind power output power, comprising: A first determination module is used to determine, after receiving an instruction to smooth the wind power output, a first output power reference value and an actual output power of each collector line in the wind farm in a current control period, and a state of charge SOC value of the first energy storage device and the second energy storage device of each collector line in the current control period; A second determination module is used to determine, based on the state of charge SOC value of each energy storage device of each collector line, a first maximum charge and discharge power of the corresponding first energy storage device and a second maximum charge and discharge power of the corresponding second energy storage device; A third determination module is used to determine the second output power reference value of each of the collector lines in the next control period adjacent to the current control period, and the charge and discharge target power of the corresponding energy storage device in the current control period, based on the first output power reference value and actual output power of each of the collector lines, and the maximum charge and discharge power of each energy storage device in the corresponding collector line; a fourth determination module, configured to determine, based on the charge and discharge target powers of the energy storage devices of each of the collector lines, respectively a first target voltage of the first energy storage device of each of the collector lines and a second target voltage of the second energy storage device; The control module is used to control the first energy storage device and the second energy storage device of each of the collecting lines to operate at corresponding target voltages respectively.

10. An electronic device, characterized in that: include: at least one processor; and, a memory communicatively coupled to the at least one processor; The memory stores instructions to be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1 to 8.

11. A non-transitory computer-readable storage medium storing computer instructions, wherein: The computer instructions are used to cause the computer to execute the method according to any one of claims 1-8.

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