Wind power smooth output control method, device and equipment and storage medium

Abstract

The invention relates to the technical field of wind power generation, in particular to a wind power smooth output control method, device and equipment and a storage medium, and the method comprises the steps: obtaining the average output power of each current collection line in a preset time period, and obtaining the initial reference value of the power smooth output of each current collection line; based on the initial reference value and the actual value of power smooth output of each current collection line, obtaining a charge-discharge power deviation value of each energy storage device; based on the charging and discharging power deviation value of each energy storage device, updating the initial reference value of power smooth output of each current collection line, and obtaining target power; and inputting the target power into the controller to obtain a final modulation voltage. By configuring the electrochemical energy storage system at the tail end of each current collection line and cooperating with a wind power smooth control method, real-time adjustment of wind power fluctuation is achieved, the stability of wind power output is greatly improved, the harmonic content is reduced, the competitiveness of a wind power plant in the electricity market is improved, and large-scale grid connection and consumption of wind power are promoted.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a method, device, equipment and storage medium for controlling smooth output of wind 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. Different from conventional energy (such as thermal power and hydropower), wind power has the characteristics of randomness, volatility and intermittence, and the output of wind power is unstable. With the large-scale grid connection of wind power, it will inevitably bring challenges to the dispatching and stable operation of the power grid.

[0003] To reduce the volatility of wind farm output power, the following methods can be used: (1) Reasonable planning of the location and spacing of wind turbines in the wind farm can reduce the impact of the wake effect and make the overall output power of the wind farm more stable; (2) Adopting advanced wind turbine control strategies, such as variable speed-variable pitch control, can automatically adjust the operating status of the wind turbine according to the real-time changes in wind speed, making the wind turbine output power more stable; (3) Wind power and other energy sources (such as solar energy, hydropower, etc.) form a complementary power generation system, so as to make the power output of the entire system more stable. However, no matter which of the above methods is used, there will still be a certain degree of volatility in wind power output.

[0004] In summary, how to design a stable wind power smooth output control method is an urgent problem to be solved. Summary of the invention

[0005] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0006] To this end, the first purpose of the present application is to propose a wind power smooth output control method to solve the problems of large limitations of existing technical means and unstable wind power output.

[0007] The second object of the present application is to provide a device.

[0008] The third objective of the present application is to provide an electronic device.

[0009] A fourth objective of the present application is to provide a computer-readable storage medium.

[0010] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a wind power smoothing output control method, comprising:

[0011] Obtain the average output power of each collector line within a preset time period to obtain an initial reference value for the smooth output power of each collector line;

[0012] Based on the initial reference value and the actual value of the power smoothing output of each collector line, obtaining the charge and discharge power deviation value of each energy storage device;

[0013] Based on the charge and discharge power deviation values ​​of the energy storage devices, the initial reference values ​​of the power smoothing output of each collector line are updated to obtain the target power;

[0014] The target power is input into the controller to obtain the final modulation voltage.

[0015] Preferably, the step of obtaining the average output power of each collector line within a preset time period to obtain an initial reference value of the smooth output power of each collector line comprises:

[0016] A preset control time period is used to calculate the average output power of each collector line within the preset time period based on the preset control time period. The calculation formula is:

[0017]

[0018] Where j is the preset time period, is the initial reference value of the power smoothing output of the i-th collector in the j-time period, P L,i (jm) is the average output power of the ith collector during the (jm) time period.

[0019] Preferably, the updating of the initial reference value of the power smoothing output of each collector line based on the charge and discharge power deviation value of each energy storage device to obtain the target power comprises:

[0020] Determine the size between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period, and the maximum charging power of the energy storage device within the preset time period; based on the size between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within the preset time period, and the maximum charging power of the energy storage device within the preset time period, adjust the initial reference value of the power smoothing output of each collector line, and calculate the target power.

[0021] Preferably, the determining of the difference between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period and the maximum charge power of the energy storage device within a preset time period comprises:

[0022] When the charge-discharge power deviation value of each energy storage device is between the maximum discharge power of the energy storage device in a preset time period and the maximum charge power of the energy storage device in a preset time period, the initial reference value of the power smoothing output of each collector line remains unchanged, that is, the target power is equal to the charge-discharge power deviation value of each energy storage device, and the calculation formula is:

[0023]

[0024] in, is the target power, It is the charge and discharge power deviation value of each energy storage device.

[0025] Preferably, the determining of the difference between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period and the maximum charge power of the energy storage device within a preset time period also includes:

[0026] When the charge and discharge power deviation value of each energy storage device is greater than the maximum discharge power of the energy storage device within a preset time period, the decrease variation coefficient of the initial reference value of the power smoothing output of each collector line is obtained, and the calculation formula is:

[0027]

[0028] Among them, k0 is the basic coefficient of the smooth output reference power conversion, k1(j) is the decrease coefficient of the initial reference value of the smooth output power of each collector line, SOC B,i It is an energy storage device;

[0029] The initial reference value of the power smoothing output of each collector line is updated based on the decreasing change coefficient of the initial reference value of the power smoothing output of each collector line, and the target power is equal to the maximum discharge power of the energy storage device within a preset time period.

[0030] Preferably, the determining of the difference between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period and the maximum charge power of the energy storage device within a preset time period also includes:

[0031] When the charge / discharge power deviation value of each energy storage device is less than the maximum charging power of the energy storage device within a preset time period, the rising change coefficient of the initial reference value of the power smoothing output of each collector line is obtained, and the calculation formula is:

[0032]

[0033] Wherein, k2(j) is the rising variation coefficient of the initial reference value of the power smoothing output of each collector line;

[0034] The initial reference value of the power smoothing output of each collector line is updated based on the rising change coefficient of the initial reference value of the power smoothing output of each collector line, and the target power is equal to the maximum charging power of the energy storage device within a preset time period.

[0035] Preferably, the step of inputting the target power into a controller to obtain a final modulation voltage comprises:

[0036] When the energy storage device is charged, the charging controller is turned on, a charging reference current is calculated based on the target power, and the charging reference current and the measured charging current are input into the charging controller to obtain a final modulation voltage;

[0037] When the energy storage device is discharging, the discharge controller is turned on, a discharge reference current is calculated based on the target power, the discharge reference current and the discharge measured current are input into the discharge controller to obtain a final modulation voltage.

[0038] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a wind power smoothing output control device, comprising:

[0039] A reference value acquisition module is used to acquire the average output power of each collector line within a preset time period to obtain an initial reference value for the smooth output power of each collector line;

[0040] A deviation value calculation module, based on the initial reference value and the actual value of the power smoothing output of each collector line, obtains the charge and discharge power deviation value of each energy storage device;

[0041] A target power calculation module updates the initial reference value of the power smoothing output of each collector line based on the charge and discharge power deviation value of each energy storage device to obtain the target power;

[0042] The modulation module inputs the target power into the controller to obtain a final modulation voltage.

[0043] To achieve the above-mentioned purpose, the third aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0044] The memory stores computer-executable instructions;

[0045] The processor executes the computer-executable instructions stored in the memory to implement any of the above methods.

[0046] To achieve the above objectives, the fourth aspect of the present application proposes a computer-readable storage medium, including computer-executable instructions stored in the computer-readable storage medium, and the computer-executable instructions are used to implement any of the methods described above when executed by a processor.

[0047] The present application provides a wind power smooth output control method, which realizes real-time regulation of wind power fluctuations by configuring an electrochemical energy storage system at the end of each collector line and cooperating with the wind power smooth control method, greatly improving the stability of wind power output, reducing harmonic content, and making it closer to conventional energy, so that wind power can better participate in the dispatching arrangement of the power grid, improve the competitiveness of wind farms in the power market, and promote large-scale grid connection and consumption of wind power. The system can not only effectively reduce the volatility of wind power, but also improve the stability and power quality of wind power by intelligently adjusting the charging and discharging process of the energy storage device. In addition, the distributed energy storage configuration reduces the burden of centralized energy storage, improves the flexibility and response speed of the system, adapts to the power demand under different wind conditions, and has high economy and application prospects. At the same time, the present invention can also save energy storage inverters and reduce the number of distributed energy storage, effectively reducing the cost and risk of the energy storage system.

[0048] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0050] Figure 1 This is a flow chart of a first specific embodiment of a wind power smooth output control method provided by the present invention;

[0051] Figure 2 This is a flow chart of a second specific embodiment of a wind power smooth output control method provided by the present invention;

[0052] Figure 3 It is a schematic diagram of the structure of the collector and its energy storage device;

[0053] Figure 4 It is a schematic diagram of the structure of the energy storage device on the DC side of the wind turbine;

[0054] Figure 5 It is a schematic diagram of the converter structure at the machine side of each collector wind turbine converter;

[0055] Figure 6 It is a schematic diagram of the structure of the grid-side conversion controller of the wind turbine converter;

[0056] Figure 7 It is a schematic diagram of the phase-locked loop structure;

[0057] Figure 8 This is a structural block diagram of a wind power smoothing output control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0058] The core of the present invention is to provide a wind power smooth output control method, device, equipment and storage medium. By configuring an electrochemical energy storage system at the end of each collecting line and cooperating with the wind power smoothing control method, real-time regulation of wind power fluctuations is achieved, which greatly improves the stability of wind power output and reduces harmonic content.

[0059] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0060] Please refer to Figure 1 , Figure 1 This is a flow chart of a first specific embodiment of a wind power smooth output control method provided by the present invention; the specific operation steps are as follows:

[0061] Step S101: obtaining the average output power of each collector line within a preset time period, and obtaining an initial reference value for the smooth output power of each collector line;

[0062] A preset control time period is used to calculate the average output power of each collector line within the preset time period based on the preset control time period. The calculation formula is:

[0063]

[0064] Where j is the preset time period, is the initial reference value of the power smoothing output of the i-th collector in the j-time period, P L,i (jm) is the average output power of the ith collector during the (jm) time period.

[0065] Step S102: based on the initial reference value and the actual value of the power smoothing output of each collector line, obtaining the charge and discharge power deviation value of each energy storage device;

[0066] Step S103: updating the initial reference value of the power smoothing output of each collector line based on the charge and discharge power deviation value of each energy storage device to obtain the target power;

[0067] Determine the size between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period, and the maximum charging power of the energy storage device within the preset time period; based on the size between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within the preset time period, and the maximum charging power of the energy storage device within the preset time period, adjust the initial reference value of the power smoothing output of each collector line, and calculate the target power.

[0068] In one embodiment, when the charge-discharge power deviation value of each energy storage device is between the maximum discharge power of the energy storage device in a preset time period and the maximum charge power of the energy storage device in a preset time period, the initial reference value of the power smoothing output of each collector line remains unchanged, that is, the target power is equal to the charge-discharge power deviation value of each energy storage device, and the calculation formula is:

[0069]

[0070] in, is the target power, It is the charge and discharge power deviation value of each energy storage device.

[0071] When the charge and discharge power deviation value of each energy storage device is greater than the maximum discharge power of the energy storage device within the preset time period, the decrease variation coefficient of the initial reference value of the power smoothing output of each collector line is obtained, and the calculation formula is:

[0072]

[0073] Among them, k0 is the basic coefficient of the smooth output reference power conversion, k1(j) is the decrease coefficient of the initial reference value of the smooth output power of each collector line, SOC B,i It is an energy storage device;

[0074] The initial reference value of the smooth power output of each collector line is updated based on the decreasing change coefficient of the initial reference value of the smooth power output of each collector line, and the target power is equal to the maximum discharge power of the energy storage device within a preset time period.

[0075] When the charge and discharge power deviation value of each energy storage device is less than the maximum charging power of the energy storage device within the preset time period, the rising change coefficient of the initial reference value of the power smoothing output of each collector line is obtained, and the calculation formula is:

[0076]

[0077] Wherein, k2(j) is the rising variation coefficient of the initial reference value of the power smoothing output of each collector line;

[0078] The initial reference value of the power smoothing output of each collector line is updated based on the rising change coefficient of the initial reference value of the power smoothing output of each collector line, and the target power is equal to the maximum charging power of the energy storage device within a preset time period.

[0079] Step S104: input the target power into the controller to obtain the final modulation voltage.

[0080] When the energy storage device is charged, the charging controller is turned on, and a charging reference current is calculated based on the target power. The charging reference current and the measured charging current are input into the charging controller to obtain a final modulation voltage.

[0081] When the energy storage device is discharging, the discharge controller is turned on, and the discharge reference current is calculated based on the target power. The discharge reference current and the measured discharge current are input into the discharge controller to obtain the final modulation voltage.

[0082] This embodiment provides a method for controlling the smooth output of wind power. By configuring an electrochemical energy storage system at the end of each collector line and cooperating with the wind power smoothing control method, real-time regulation of wind power fluctuations is achieved, the stability of wind power output is greatly improved, and the harmonic content is reduced, making it closer to conventional energy, so that wind power can better participate in the dispatching arrangement of the power grid, improve the competitiveness of wind farms in the power market, and promote large-scale grid connection and consumption of wind power. The system can not only effectively reduce the volatility of wind power, but also improve the stability and power quality of wind power by intelligently adjusting the charging and discharging process of the energy storage device. In addition, the distributed energy storage configuration reduces the burden of centralized energy storage, improves the flexibility and response speed of the system, adapts to the power demand under different wind conditions, and has high economy and application prospects. At the same time, the present invention can also save energy storage inverters and reduce the number of distributed energy storage, effectively reducing the cost and risk of the energy storage system.

[0083] Based on the above embodiment, this embodiment describes a wind power smooth output control method. Figure 2 As shown, the details are as follows:

[0084] There are n 5-collectors in the wind farm, each of which is equipped with m wind turbines. An electrochemical energy storage device is connected to the DC bus of the wind turbine converter at the end of each collector. The overall layout of the collector and its energy storage device is shown in Figure 3 The wind turbine is mainly composed of 1-power generation system (including impeller, rotating chain and generator), 2-converter and 3-box transformer, 4-energy storage device is mainly composed of battery system 4-1, DC-DC bidirectional converter 4-2 and circuit breaker 4-3, each collector is connected to 7-66kV AC bus of booster station through 6-circuit breaker, and then the voltage is increased to 220kV through 8-boosting transformer and then connected to the grid.

[0085] Start to execute the wind power smooth output control mode, count the average output power of each collector in the previous 10 minutes, and use it as the initial reference value of the power smooth output of each collector, as follows:

[0086]

[0087] Among them, assuming that the first control time period is j, is the initial reference value of the power smoothing output of the i-th collector in the j-time period, P L,i (jm) is the average output power of the ith collector line in the (jm) time period, and each time period corresponds to 1 minute.

[0088] According to the SOC of each energy storage device B,i Determine the charge and discharge limit coefficient K B,i , and its calculation formula is:

[0089]

[0090] Among them, K B_d,i is the discharge coefficient of the energy storage device, when The discharge coefficient used for timing; K B_c,i is the charging coefficient of the energy storage device, when When it is negative, the charging coefficient is used. The maximum charging and discharging power is calculated according to the charging and discharging limit coefficients of each energy storage, as follows:

[0091]

[0092] in, is the maximum discharge power of energy storage device i in time period j, is the maximum charging power of energy storage device i in time period j.

[0093] Calculate the deviation between the reference value and the actual value of the power smoothing output of each collector line as follows:

[0094]

[0095] In the formula, is the smoothed output reference power of the ith collector line in the time period of time j, is the actual power output of the i-th collector line in the time period of time j. According to the deviation value, the power smoothing output reference value of each collector line and the energy storage charging and discharging are controlled in three states.

[0096] when , the power smoothing output reference value of the next control period remains unchanged, that is,

[0097]

[0098] The target power of each energy storage device in this control period is the power deviation value, that is,

[0099]

[0100] when When the energy storage SOC B,i (j) Calculate the smoothed output reference power down conversion coefficient k1(j) as follows:

[0101]

[0102] In the formula, k0 is the basic coefficient of the smooth output reference power conversion. The power smooth output reference value of the next control period is calculated using the following formula:

[0103]

[0104] In the formula, ΔT is the step length of the control period, 1 minute. The target power of each energy storage device in this control period is the maximum discharge power of each energy storage device in this period, as follows:

[0105]

[0106] when When the energy storage SOC B,i (j) Calculate the smoothed output reference power rise conversion coefficient k2(j) as follows:

[0107]

[0108] The power smoothing output reference value for the next control period is calculated using the following formula:

[0109]

[0110] The target charging and discharging power of each energy storage device in this control period is the maximum charging power of each energy storage device in this period, as follows:

[0111]

[0112] The DC side energy storage device of the wind turbine at the end of each collector tracks the target power through the DC-DC bidirectional converter 4-2 See also Figure 4 , mainly including 20-charging control process and 21-discharging control process. 20-charging control process mainly consists of S1 controlling the conversion switch 20-1, charging modulation voltage PI calculation 20-2, and charging reference current calculation 20-3. 21-discharging control process mainly consists of S2 controlling the conversion switch 21-1, discharging modulation voltage PI calculation 21-2, and discharging reference current calculation 21-3.

[0113] When the energy storage system is charging, S1 controls the conversion switch to switch to the charging controller, and S2 controls the conversion switch to switch off. The DC-DC charges the energy storage battery through the step-down conversion mode. First, the charging reference current is calculated by the charging reference power. The formula is as follows:

[0114]

[0115] Then, by substituting the charging reference current and the measured charging current into the PI module, the charging modulation voltage is calculated as follows:

[0116]

[0117] Finally, the IGBT module T1 is controlled to be switched on and off at a certain duty cycle through the charge modulation voltage, so that the energy storage system can be charged according to the specified reference power.

[0118] When the energy storage system is discharging, S1 controls the conversion switch to switch off, and S2 controls the conversion switch to switch to the discharge controller. The DC-DC discharges the energy storage battery through the boost conversion mode. First, the charging reference current is calculated by the discharge reference power, and the formula is as follows:

[0119]

[0120] Then, the discharge reference current and the measured discharge current are substituted into the PI module to calculate the discharge modulation voltage as follows:

[0121]

[0122] Finally, the discharge modulation voltage is used to control the IGBT module T2 to be turned on and off at a certain duty cycle, so that the energy storage system can discharge according to the specified reference current.

[0123] Based on the above content, this embodiment also describes the converters at the machine side of each collector wind turbine converter, such as Figure 5 As shown, it includes a generator rotor phase calculation module 10, an optimal power operation control module 11 and a current inner loop control module 12.

[0124] The input of the generator rotor phase calculation module 10 is the generator measured speed ω g , the output is the generator rotor phase θ g , the calculation formula is as follows:

[0125]

[0126] The optimal power operation control module 11 is composed of an optimal power control torque calculation 11-1 and a q-axis current control target value calculation 11-2. The optimal power control torque calculation 11-1 inputs the generator measured speed ω g , the output is the generator control target torque T * , the formula is as follows:

[0127]

[0128] In the formula, K opt is the optimal power control torque coefficient. The q-axis current control target value calculation 11-2 input is the motor control target torque T * , the output is the generator q-axis current control target value The formula is as follows:

[0129]

[0130] Where n p is the number of generator pole pairs, ψ f is the permanent magnet flux of the generator.

[0131] The current inner loop calculation module 12 includes PI calculations 12-1 and 12-2, dq coordinate transformation 12-3 and dq coordinate inverse transformation 12-4. First, the three-phase current measurement value i of the generator is sabc Converted into dq axis current i through dq transformation sdq ,as follows:

[0132]

[0133] Then, the voltage value corresponding to the current loop is calculated by PI, the formula is as follows:

[0134]

[0135] Afterwards, the dq axis cross-influence term is introduced to obtain the target value of the generator stator dq axis voltage control, and the formula is as follows:

[0136]

[0137] In the formula, ω e is the electromagnetic speed of the generator rotor, which is ω e and n p Finally, the generator stator dq axis voltage control target value u sdq * Substitute the dq coordinate inverse transformation to calculate the converter side converter modulation voltage control target value u sabc * , the formula is as follows:

[0138]

[0139] The wind turbine converter grid-side converter at the end of each collector line stabilizes the DC bus voltage through current loop control, thereby The real-time power is transmitted to the grid; the grid-side converters of the other wind turbine converters on each collector stabilize the DC bus voltage through the current loop control, thereby Real-time power delivery to the grid, see Figure 6 The grid-side conversion controller of the wind turbine converter mainly includes a phase-locked loop phase angle calculation module 30 , a current outer loop calculation module 31 and a current inner loop calculation module 32 .

[0140] The input of the phase-locked loop phase angle calculation module 30 is the three-phase voltage measured by the power grid, and the output is the power grid frequency and phase angle. The calculation process is shown in Figure 7 First, set the initial phase to θ, substitute it into the dq coordinate transformation, and calculate the grid voltage u od and u oq The value is as follows:

[0141]

[0142] will u oq Substitute into the PI formula to calculate the grid frequency. The formula is as follows:

[0143]

[0144] Integrate ω to calculate the grid phase angle, the formula is as follows:

[0145]

[0146] If u oq If it is not close to 0, substitute the calculated phase angle into the formula to recalculate the grid frequency and phase angle until u oq Close to 0, locking the grid frequency and phase angle.

[0147] The current outer loop calculation module 31 includes a d-axis current outer loop PI calculation 31-1 and a q-axis current outer loop PI calculation 31-2. The d-axis current outer loop PI calculation 31-1 inputs the converter DC bus capacitance measurement value U DC and reference value Output is the d-axis current control target value The calculation formula is as follows:

[0148]

[0149] The input of the q-axis current outer loop PI calculation 31-2 is the reactive power measurement value Q i and reference value Output is the q-axis current control target value The calculation formula is as follows:

[0150]

[0151] The current inner loop calculation module 32 includes PI calculations 32-1 and 32-2, dq coordinate transformation 32-3 and dq coordinate inverse transformation 32-4. First, the inverter output three-phase current measurement value i abc Converted into dq axis current i through dq transformation dq Then, the voltage value corresponding to the current loop is calculated by PI, and the formula is as follows:

[0152]

[0153] Afterwards, the inverter dq axis voltage control target value is obtained by introducing the dq axis cross-influence term, and the formula is as follows:

[0154]

[0155] Finally, substitute the inverter dq axis voltage control target value udq* into the dq coordinate inverse transformation to calculate the inverter modulation voltage control target value u sabc * , the formula is as follows:

[0156]

[0157] A wind power smooth output control method provided by an embodiment of the present invention realizes real-time regulation of wind power fluctuations by configuring an electrochemical energy storage system at the end of each collector line and cooperating with the wind power smooth control method, thereby greatly improving the stability of wind power output, reducing harmonic content, and making it closer to conventional energy, so that wind power can better participate in the dispatching arrangement of the power grid, improve the competitiveness of wind farms in the power market, and promote large-scale grid connection and consumption of wind power. The system can not only effectively reduce the volatility of wind power, but also improve the stability and power quality of wind power by intelligently adjusting the charging and discharging process of the energy storage device. In addition, the distributed energy storage configuration reduces the burden of centralized energy storage, improves the flexibility and response speed of the system, adapts to the power demand under different wind conditions, and has high economy and application prospects. At the same time, the present invention can also save energy storage inverters and reduce the number of distributed energy storage, effectively reducing the cost and risk of the energy storage system.

[0158] Please refer to Figure 8 , Figure 8 A structural block diagram of a wind power smooth output control device provided by an embodiment of the present invention; the specific device may include:

[0159] The reference value acquisition module 100 acquires the average output power of each collector line within a preset time period to obtain an initial reference value for the smooth output power of each collector line;

[0160] The deviation value calculation module 200 obtains the charge and discharge power deviation value of each energy storage device based on the initial reference value and the actual value of the power smoothing output of each collector line;

[0161] The target power calculation module 300 updates the initial reference value of the power smoothing output of each collector line based on the charge and discharge power deviation value of each energy storage device to obtain the target power;

[0162] The modulation module 400 inputs the target power into a controller to obtain a final modulation voltage.

[0163] A wind power smooth output control device of the present embodiment is used to implement the aforementioned wind power smooth output control method. Therefore, the specific implementation method of a wind power smooth output control device can be seen in the implementation method part of a wind power smooth output control method in the previous text. For example, the reference value acquisition module 100, the deviation value calculation module 200, and the target power calculation module 300 are respectively used to implement steps S101, S102, S103, S104, and the modulation module 400 in the aforementioned wind power smooth output control method. Therefore, its specific implementation method can refer to the description of the corresponding various parts of the implementation method, which will not be repeated here.

[0164] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0165] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0166] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0167] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0168] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0169] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0170] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 application. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0171] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0172] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application 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 reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0173] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0174] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by 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.

[0175] 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.

[0176] In addition, each functional unit in each embodiment of the present application 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.

[0177] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A wind power smooth output control method, characterized in that: include: Obtain the average output power of each collector line within a preset time period to obtain an initial reference value for the smooth output power of each collector line; Based on the initial reference value and the actual value of the power smoothing output of each collector line, obtaining the charge and discharge power deviation value of each energy storage device; Based on the charge and discharge power deviation values ​​of the energy storage devices, the initial reference values ​​of the power smoothing output of each collector line are updated to obtain the target power; The target power is input into the controller to obtain the final modulation voltage.

2. The wind power smooth output control method according to claim 1, characterized in that: The step of obtaining the average output power of each collector line within a preset time period to obtain an initial reference value for the smooth output power of each collector line includes: A preset control time period is used to calculate the average output power of each collector line within the preset time period based on the preset control time period. The calculation formula is: Where j is the preset time period, is the initial reference value of the power smoothing output of the i-th collector in the j-time period, P L,i (jm) is the average output power of the ith collector during the (jm) time period.

3. The wind power smooth output control method according to claim 2, characterized in that: The updating of the initial reference value of the power smoothing output of each collector line based on the charge and discharge power deviation value of each energy storage device to obtain the target power includes: Determine the size between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period, and the maximum charging power of the energy storage device within the preset time period; based on the size between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within the preset time period, and the maximum charging power of the energy storage device within the preset time period, adjust the initial reference value of the power smoothing output of each collector line, and calculate the target power.

4. The wind power smooth output control method according to claim 3, characterized in that: The determining of the difference between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period and the maximum charge power of the energy storage device within a preset time period comprises: When the charge-discharge power deviation value of each energy storage device is between the maximum discharge power of the energy storage device in a preset time period and the maximum charge power of the energy storage device in a preset time period, the initial reference value of the power smoothing output of each collector line remains unchanged, that is, the target power is equal to the charge-discharge power deviation value of each energy storage device, and the calculation formula is: in, is the target power, It is the charge and discharge power deviation value of each energy storage device.

5. The wind power smooth output control method according to claim 4, characterized in that: The determining of the difference between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period and the maximum charge power of the energy storage device within a preset time period also includes: When the charge and discharge power deviation value of each energy storage device is greater than the maximum discharge power of the energy storage device within a preset time period, the decrease variation coefficient of the initial reference value of the power smoothing output of each collector line is obtained, and the calculation formula is: Among them, k0 is the basic coefficient of the smooth output reference power conversion, k1(j) is the decrease coefficient of the initial reference value of the smooth output power of each collector line, SOC B,i It is an energy storage device; The initial reference value of the power smoothing output of each collector line is updated based on the decreasing variation coefficient of the initial reference value of the power smoothing output of each collector line, and the target power is equal to the maximum discharge power of the energy storage device within a preset time period.

6. The wind power smooth output control method according to claim 5, characterized in that: The determining of the difference between the charge and discharge power deviation value of each energy storage device and the maximum discharge power of the energy storage device within a preset time period and the maximum charge power of the energy storage device within a preset time period also includes: When the charge / discharge power deviation value of each energy storage device is less than the maximum charging power of the energy storage device within a preset time period, the rising change coefficient of the initial reference value of the power smoothing output of each collector line is obtained, and the calculation formula is: Wherein, k2(j) is the rising variation coefficient of the initial reference value of the power smoothing output of each collector line; The initial reference value of the power smoothing output of each collector line is updated based on the rising change coefficient of the initial reference value of the power smoothing output of each collector line, and the target power is equal to the maximum charging power of the energy storage device within a preset time period.

7. The wind power smooth output control method according to claim 1, characterized in that: Inputting the target power into the controller to obtain a final modulation voltage comprises: When the energy storage device is charged, the charging controller is turned on, a charging reference current is calculated based on the target power, and the charging reference current and the measured charging current are input into the charging controller to obtain a final modulation voltage; When the energy storage device is discharging, the discharge controller is turned on, a discharge reference current is calculated based on the target power, the discharge reference current and the measured discharge current are input into the discharge controller to obtain a final modulation voltage.

8. A wind power smooth output control device, characterized in that: include: A reference value acquisition module is used to acquire the average output power of each collector line within a preset time period to obtain an initial reference value for the smooth output power of each collector line; A deviation value calculation module, based on the initial reference value and the actual value of the power smoothing output of each collector line, obtains the charge and discharge power deviation value of each energy storage device; A target power calculation module updates the initial reference value of the power smoothing output of each collector line based on the charge and discharge power deviation value of each energy storage device to obtain the target power; The modulation module inputs the target power into the controller to obtain a final modulation voltage.

9. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

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