Active power control method and device in grid-connected scene

Abstract

The invention provides an active power control method and device in a grid-connected scene, and relates to the technical field of wind turbine generator grid-connected control. The method comprises the following specific steps: acquiring a power system dispatching instruction to determine pre-configured active reference power; acquiring actual active power output of a wind turbine generator grid-connected point to determine a first power difference; determining a second power difference allocated to each wind turbine generator according to the first power difference, and determining target active power of the wind turbine generator; and collecting operation environment information of the wind turbine generator to adjust the state of the wind turbine generator so as to enable the active power output by the wind turbine generator to reach the target active power. The target active power is determined through the actual active power output of the wind turbine generator, the state of the wind turbine generator is adjusted according to the operation environment information of the wind turbine generator to enable the output power to reach the target active power, accurate control over the output power of the wind turbine generator is achieved, large errors of the output active power are avoided, and the output efficiency is improved. And the operation stability of the wind turbine generator and the power grid is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind turbine grid-connected control, and in particular to an active power control method and device in a grid-connected scenario. Background Art

[0002] The randomness and intermittency of wind energy determine the instability of active power output of wind farms. With the continuous expansion of wind power scale and the gradual increase of wind power penetration, large-capacity wind power access has brought many new challenges to the dispatching and safe and stable operation of power systems. In order to cope with the impact of large-capacity wind power access, the grid operation and management agencies of EU countries have formulated their own management regulations for wind farm access to the grid based on factors such as the technical level of wind power equipment, wind power installed capacity and the strength of the grid in their respective countries. These regulations clearly require that wind farms should have active power regulation capabilities and make clear provisions for the active power regulation change rate.

[0003] In the related art, the output power control accuracy of wind power equipment is low, resulting in the active power output of the wind turbine set failing to meet or exceeding expectations, which will reduce the stability of the power grid when connected to the grid. Summary of the invention

[0004] The present disclosure provides an active power control method, device and system in a grid-connected scenario to at least solve the problem of low accuracy in output power control of wind power equipment in related technologies. The technical solution of the present disclosure is as follows:

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an active power control method in a grid-connected scenario, comprising:

[0006] Obtaining a power system dispatch instruction, and determining a preconfigured active reference power according to the power system dispatch instruction;

[0007] Collecting the actual active power output of the wind turbine generator grid connection point, and determining a first power difference according to the actual active power output and the active reference power;

[0008] Determine a second power difference allocated to each wind turbine generator set according to the first power difference, and determine a target active power of the wind turbine generator set according to the second power difference;

[0009] The operating environment information of the wind turbine generator set is collected, and the state of the wind turbine generator set is adjusted according to the operating environment information and the target active power of the wind turbine generator set so that the active power output by the wind turbine generator set reaches the target active power.

[0010] Optionally, the step of determining the first power difference according to the actual active output and the active reference power specifically includes:

[0011] The active reference power is subtracted from the actual active output, and the result is used as the first power difference.

[0012] Optionally, the step of determining the target active power of the wind turbine generator set according to the second power difference specifically includes:

[0013] The second power difference is added to the active power currently output by the wind turbine generator set to determine the target active power.

[0014] Optionally, the operating environment information of the wind turbine generator set specifically includes at least one of the following:

[0015] Air density; swept area of ​​the wind turbine rotor; wind speed at the center of the wind turbine hub.

[0016] Optionally, the step of adjusting the state of the wind turbine generator set according to the operating environment information and the target active power of the wind turbine generator set specifically includes:

[0017] When the wind speed at the center of the hub of the wind turbine is in a preset low wind speed zone, the electromagnetic torque of the generator and the blade pitch angle of the wind turbine are adjusted to adjust the rotational angular velocity of the wind turbine blades to achieve the tip speed ratio of the wind rotor, so that the output power of the wind turbine reaches the target active power;

[0018] When the wind speed at the center of the hub in the wind turbine generator set is in a preset high wind speed zone, the blade pitch angle of the wind turbine generator set is adjusted so that the output power of the wind turbine generator set reaches the target active power.

[0019] Optionally, the active power output of the wind turbine generator set is expressed as follows:

[0020] Wherein, P is the active power output, R is the swept radius of the wind rotor, πR 2 is the swept area of ​​the rotor in the wind turbine, C p is the wind energy utilization coefficient, and v is the wind speed at the center of the hub in the wind turbine.

[0021] Optionally, the relationship between the wind energy utilization coefficient and the blade pitch angle and the tip speed ratio is expressed as follows:

[0022] Wherein, β is the blade pitch angle, λ is the tip speed ratio, and λ is the ratio of the tip linear velocity to the incoming wind speed during rotation. Wherein, ω is the rotational angular velocity of the fan blade; R is the swept surface radius of the wind wheel, and vw is the incoming wind speed.

[0023] According to a second aspect of an embodiment of the present disclosure, there is provided an active power control device in a grid-connected scenario, comprising:

[0024] A receiving module, used for obtaining a power system dispatching instruction, and determining a pre-configured active reference power according to the power system dispatching instruction;

[0025] A difference calculation module, used for collecting the actual active power output of the wind turbine generator grid connection point, and determining a first power difference according to the actual active power output and the active reference power;

[0026] a power calculation module, configured to determine a second power difference allocated to each wind turbine generator set according to the first power difference, and determine a target active power of the wind turbine generator set according to the second power difference;

[0027] The control module is used to collect the operating environment information of the wind turbine set, and adjust the state of the wind turbine set according to the operating environment information and the target active power of the wind turbine set so that the active power output by the wind turbine set reaches the target active power.

[0028] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, including:

[0029] processor;

[0030] a memory for storing instructions executable by the processor;

[0031] The processor is configured to execute the instructions to implement the method as described in any one of the first aspects.

[0032] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute a method as described in any one of the first aspects.

[0033] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects:

[0034] The target active power is determined by the actual active output of the wind turbine set, and the state of the wind turbine set is adjusted according to the operating environment information of the wind turbine set so that its output power reaches the target active power, thereby achieving accurate control of the output power of the wind turbine set, avoiding large errors in the output active power, and balancing the active output of the wind turbine set with the load demand, thereby improving the operating stability of the wind turbine set and the power grid.

[0035] The state of the wind turbine is adjusted according to the operating environment information of the wind turbine so that the output active power reaches the target active power. The adjustment process is based on the formula of the active power output of the wind turbine, which can accurately control the output active power and improve the accuracy of the output active power control.

[0036] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute improper limitations on the present disclosure.

[0038] Figure 1 The invention is a block diagram of a wind power generation grid-connected control system in a grid-connected scenario according to an exemplary embodiment.

[0039] Figure 2 The present invention is a flow chart of an active power control method in a grid-connected scenario according to an exemplary embodiment.

[0040] Figure 3 It is a block diagram of an active power control system in a grid-connected scenario according to an exemplary embodiment.

[0041] Figure 4 The figure is a relationship diagram between the operating power and wind speed of a wind turbine according to an exemplary embodiment.

[0042] Figure 5 The figure is a characteristic curve diagram of a wind energy utilization coefficient according to an exemplary embodiment.

[0043] Figure 6 FIG. 4 is a typical control strategy curve diagram for an ideal power trajectory curve according to an exemplary embodiment.

[0044] Figure 7 The figure is a structural diagram of a controller according to an exemplary embodiment.

[0045] Figure 8 It is a block diagram of an active power control device in a grid-connected scenario according to an exemplary embodiment.

[0046] Fig. 9 It is a block diagram of a device according to an exemplary embodiment.

[0047] Fig.10 It is a block diagram of a device according to an exemplary embodiment. DETAILED DESCRIPTION

[0048] In order to enable ordinary persons in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. 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.

[0050] It should be noted that the user information involved in this disclosure (including but not limited to user device information, user personal information, etc.) is all information authorized by the user or fully authorized by all parties.

[0051] The randomness and intermittency of wind energy determine the instability of active power output of wind farms. With the continuous expansion of wind power scale and the gradual increase of wind power penetration, large-capacity wind power access has brought many new challenges to the dispatching and safe and stable operation of power systems. In order to cope with the relevant impacts of large-capacity wind power access, the grid operation and management agencies of EU countries have formulated their own management regulations for wind farm access to the grid based on factors such as the technical level of wind power equipment, wind power installed capacity and the strength of the grid in their respective countries. These regulations clearly require that wind farms should have active power regulation capabilities and make clear provisions for the active power regulation change rate. The international trend is to make wind power reach or approach the performance of conventional power sources through technological progress and the formulation of mandatory standards. In February 2009, the State Grid Corporation of China issued the "Technical Regulations for Wind Farm Access to the Grid (Revised Edition)", which pointed out: "Wind farms should have the ability to regulate active power and be able to control their active power output according to the instructions of the grid dispatching department. In order to achieve control of active power, wind farms need to be equipped with active power control systems to receive and automatically execute active power control signals sent remotely by the dispatching department." Therefore, how to achieve effective control of the active power of wind farms and incorporate it into the grid automatic generation control (AGC) management is a topic of great concern to both grid dispatching and wind farms. Figure 1 FIG. 1 is a block diagram of a wind power generation grid-connected control system in a grid-connected scenario according to an exemplary embodiment. Figure 1As shown in the figure, the control process of grid-connected wind power output can be divided into two stages: the first is the optimal dispatching control of wind farms. According to the load demand in a certain area and the operating status of each power plant, the power dispatching center issues active and reactive reference power pref and qref to the wind farm through reasonable planning and calculation. The wind farm control system optimizes the active and reactive power according to the proposed optimization control strategy and calculates the reference output power pref and qref corresponding to each wind turbine. The second is the power control of the wind turbine. According to the allocated reference active output pref, combined with external conditions such as wind speed and waves, the corresponding electromagnetic torque and pitch angle in the wind turbine are adjusted to track the active reference output.

[0052] The environment of offshore wind power generation is relatively complex. The active output of wind turbines is not only affected by wind speed changes, wakes between turbines, but also by waves, tides, platform offsets, etc. The control goal is not limited to maintaining stable power output, but also to reduce system load as much as possible. Considering the limited time and capacity, this paper mainly studies the optimization scheduling process of active output of offshore wind farms, and realizes the reasonable allocation of active output of each wind turbine to participate in the frequency modulation of the power grid system when the power grid frequency fluctuates.

[0053] Figure 2 FIG. 1 is a flow chart showing an active power control method in a grid-connected scenario according to an exemplary embodiment. Figure 2 As shown, the method includes:

[0054] Step 201: Obtain a power system dispatch instruction, and determine a preconfigured active reference power according to the power system dispatch instruction.

[0055] Wind energy is an intermittent and unstable renewable energy source. The constant change in wind speed will directly affect the operation of wind turbines in different working states. As the penetration rate of wind power in the power grid continues to increase, it will cause system frequency fluctuations. In order to maintain the stability of the power system, it is necessary to adopt corresponding control strategies to adjust the active output of wind turbines to keep a balance with load demand. According to the load demand in a certain area and the operating status of each power plant, the power grid dispatching center issues power system dispatching instructions to wind farms through reasonable planning and calculation, which carry active reference power and reactive reference power.

[0056] Step 202 : collecting the actual active power output of the wind turbine generator grid-connected point, and determining a first power difference according to the actual active power output and the active reference power.

[0057] Step 203, determining a second power difference allocated to each wind turbine generator set according to the first power difference, and determining a target active power of the wind turbine generator set according to the second power difference;

[0058] Step 204 , collecting operating environment information of the wind turbine generator set, and adjusting the state of the wind turbine generator set according to the operating environment information and the target active power of the wind turbine generator set, so that the active power output by the wind turbine generator set reaches the target active power.

[0059] Figure 3 FIG. 1 is a block diagram of an active power control system in a grid-connected scenario according to an exemplary embodiment. Figure 3 As shown, in the system, the grid dispatch center can give priority to wind power supply according to the load demand changes and the actual power generation status of the wind farm. The wind farm performs reasonable power allocation according to the received dispatch instructions and optimizes the reference output of each unit in the wind farm, that is, the target active power of the wind turbine unit.

[0060] The external input signals of the control system mainly include four parts, including the dispatching instructions of the power system, the actual active output of the grid-connected point, and the wind speed information and status information of the wind turbine. According to the dispatching instructions and the grid-connected power, the power difference ΔP can be determined, and then the difference is allocated through a specific optimization dispatching algorithm, and the active output reference value is tracked to participate in the system frequency regulation. The operating environment information of the wind turbine is collected and used for short-term power forecasting, formulating a reasonable power dispatching plan, and serving as a theoretical basis for relevant optimization strategies. Optionally, a doubly fed asynchronous wind turbine (DFIG) is used in the wind turbine, which is a wound induction generator and the core part of a variable speed constant frequency wind turbine. DFIG mainly consists of two parts, namely the cooling system and the body: the body consists of a stator, a rotor and a bearing, and the cooling system is divided into three types of structures: air-to-air cooling, water cooling and air-to-water cooling.

[0061] At the same time, from Figure 3 It can be seen that the power output optimization allocation module of the offshore wind farm consists of two parts: timing classification optimization control and distributed coordination control.

[0062] Time-series classification optimization control: This part takes into account the influence of wake effect in offshore wind farms, which leads to obvious differences in the active output of wind turbines. It combines the different actual power generation states of each unit and arranges them to participate in frequency regulation in turn according to their power control characteristics and frequency regulation principles;

[0063] Distributed coordinated control: The entire offshore wind farm is regarded as a multi-agent system model, aiming to reasonably allocate the reference output of wind turbines and achieve optimized scheduling.

[0064] Optionally, the step of determining the first power difference according to the actual active output and the active reference power specifically includes:

[0065] The active reference power is subtracted from the actual active output, and the result is used as the first power difference.

[0066] In this embodiment, the active reference power is the output power target issued to the wind farm by the grid dispatching center based on the load demand in a certain area and the operating status of each power plant after reasonable planning and calculation. When the active power output of the wind farm reaches the active reference power, it is beneficial to the smooth operation of the grid.

[0067] This embodiment determines the first power difference by the difference between the active reference power and the actual active output, and accurately determines the difference between the total active power output by the wind turbine and the target, which is conducive to the subsequent accurate adjustment of the active power output by the wind turbine and improves the accuracy of the power control process.

[0068] Optionally, the step of determining the target active power of the wind turbine generator set according to the second power difference specifically includes:

[0069] The second power difference is added to the active power currently output by the wind turbine generator set to determine the target active power.

[0070] In this embodiment, by determining the target active power by combining the second power difference with the active power currently output by the wind turbine generator set, the power output demand corresponding to the wind turbine generator set is accurately obtained, thereby improving the accuracy of controlling each wind turbine generator set.

[0071] Optionally, the operating environment information of the wind turbine generator set specifically includes at least one of the following:

[0072] Air density; swept area of ​​the wind turbine rotor; wind speed at the center of the wind turbine hub.

[0073] Figure 4 FIG. 1 is a diagram showing the relationship between the operating power and wind speed of a wind turbine according to an exemplary embodiment. Figure 4 As shown in the figure, the horizontal axis is the wind speed at the center of the wind turbine hub, in units of (m / s), and the vertical axis is the active output power of the wind turbine, in megawatts (MW). It can be clearly seen from the power output curve in the figure that the active output power changes with the wind speed (the wind speed detected at the center of the wind turbine hub). The active output of the AB segment curve increases, and the BC segment maintains a constant output, and corresponds to three special positions on the horizontal axis: (1) the cut-in wind speed point v in , the minimum wind speed corresponding to the start of the unit's power generation and grid connection; (2) the rated wind speed point v r , the wind speed corresponding to the unit just reaching its rated power; (3) Cut-out wind speed point v out , the maximum operating wind speed that allows the unit to output active power.

[0074] Obviously, the grid connection process of wind turbines is only within a limited wind speed range, and this range can be divided into two different areas according to the saturation of the load, I (low wind speed area) and II (high wind speed area). In the low wind speed area, the active output power of the unit continues to increase until it reaches the rated power, and in the high wind speed area, the unit always maintains the rated power output. When the wind speed is lower than the cut-in wind speed, the wind turbine runs but is not connected to the grid, and the wind turbine is in a standby stagnation state, because the cost of grid-connected power generation in this area exceeds the value of the electricity it generates; similarly, when the wind speed exceeds the cut-out wind speed, no electricity is generated, because the wind turbine is stopped when the cut-out wind speed is exceeded, thereby protecting it from structural overload. It can be seen that the research on the optimization allocation technology of wind turbine grid-connected output is also mainly aimed at the two stages of low wind speed area and high wind speed area.

[0075] Before controlling the wind turbine, it is necessary to obtain the operating environment information. The operating environment information is an observable but uncontrollable parameter, including air density ρ, rotor swept area A, and wind speed v at the hub center, but these factors will affect the active output power of the wind turbine. After obtaining this operating environment information, other parameters in the wind turbine can be adjusted to control the output active power.

[0076] In this embodiment, by collecting the operating environment information, it is convenient to adjust the state of the wind turbine generator set later, so as to realize the control of the active power output of the wind turbine generator set, thereby improving the accuracy of the control of the wind turbine generator set.

[0077] Optionally, the step of adjusting the state of the wind turbine generator set according to the operating environment information and the target active power of the wind turbine generator set specifically includes:

[0078] When the wind speed at the center of the hub of the wind turbine is in a preset low wind speed zone, the electromagnetic torque of the generator and the blade pitch angle of the wind turbine are adjusted to adjust the rotational angular velocity of the wind turbine blades to achieve the tip speed ratio of the wind rotor, so that the output power of the wind turbine reaches the target active power;

[0079] When the wind speed at the center of the hub in the wind turbine generator set is in a preset high wind speed zone, the blade pitch angle of the wind turbine generator set is adjusted so that the output power of the wind turbine generator set reaches the target active power.

[0080] Optionally, the active power output of the wind turbine generator set is expressed as follows:

[0081] Wherein, P is the active power output, R is the swept radius of the wind rotor, πR 2 is the swept area of ​​the rotor in the wind turbine, C p is the wind energy utilization coefficient, and v is the wind speed at the center of the hub in the wind turbine.

[0082] Since the swept radius of the wind wheel in the above formula is a fixed value for each wind turbine and cannot be adjusted at any time; and the wind speed at the center of the hub of the wind turbine is a value that cannot be controlled manually, in order to adjust the active power output P, ​​it is necessary to control the wind energy utilization coefficient C p size to achieve.

[0083] Optionally, the Betz limit value of the wind energy utilization coefficient can be obtained as 59.3% according to the wind energy conversion principle, but in the actual power generation process, its maximum value range is generally 25% to 45%. The formula for the relationship between the wind energy utilization coefficient and the blade pitch angle and the tip speed ratio is:

[0084] Wherein, β is the blade pitch angle, λ is the tip speed ratio, and λ is the ratio of the tip linear velocity to the incoming wind speed during rotation. Wherein, ω is the rotational angular velocity of the fan blade; R is the swept surface radius of the wind wheel, and vw is the incoming wind speed.

[0085] Figure 5 FIG. 1 is a characteristic curve diagram of a wind energy utilization coefficient according to an exemplary embodiment. Figure 5 As shown in the figure, at a certain pitch angle β, the wind energy utilization coefficient C p It changes with the blade tip speed ratio λ. When the unit achieves maximum power at a certain wind speed, it corresponds to the optimal blade tip speed ratio λ. op , and is unique; when the tip speed ratio λ op When the wind speed remains constant, the wind energy utilization coefficient decreases as the pitch angle increases.

[0086] Figure 6 is a typical control strategy curve diagram for an ideal power trajectory curve according to an exemplary embodiment, such as Figure 6 As shown, the following control strategy can be obtained:

[0087] 1) In the low wind speed area, it is between the cut-in wind speed and the rated wind speed. In this area, as the wind speed changes, the active output of the wind turbine gradually increases. Under normal power generation conditions, the control target is to maintain MPPT power generation, that is, the wind turbine outputs at maximum power. The main control strategy is mainly achieved by controlling the electromagnetic torque Tg of the generator. The blade pitch angle β of the unit is adjusted to 0, and the electromagnetic torque Tg of the generator is controlled to adjust the rotation angular velocity of the wind turbine blade to achieve the optimal tip speed ratio of the wind wheel, so that the wind energy utilization rate C p The wind speed is as close to the optimal value as possible under the current wind speed, thereby realizing the maximum power tracking control of the wind turbine.

[0088] 2) In the high wind speed area, it is located between the rated wind speed and the cut-out wind speed. In this area, the generated electric energy is required to always maintain the rated output value in order to minimize the structural load and reduce the fatigue damage to the wind turbine. The control target in this area is mainly achieved by adjusting the pitch angle β of the wind turbine. By adjusting the size of the wind turbine blade pitch angle β, the wind energy utilization coefficient is changed, and the capture of wind energy by the unit is reduced, so as to control the active output of the unit to remain near the rated value.

[0089] Figure 7 FIG. 1 is a controller structure diagram according to an exemplary embodiment. Figure 7 As shown, since there are two different control areas, the usual method is to apply two different sets of controllers and use a non-disturbance transmission mechanism to connect them to each other. When the wind speed is lower than the rated value, the control system should keep the pitch angle at the optimal value and control the electromagnetic torque of the generator to make the wind turbine reach the optimal tip speed ratio. This control process can be achieved by setting two switches at position I in the figure below; similarly, when the wind speed is higher than the rated speed, a switch is set at position II in the figure, and the output power is kept constant by adjusting the pitch angle of the rotating blades, and the power controller is used to control the generator torque to maintain it near a constant value in order to eliminate the steady-state error of the output power.

[0090] In both regions, the powertrain pressure damper is used to actively suppress powertrain vibrations. The two controllers work together, and a bumpless transfer mechanism is used to achieve smooth switching between the two controllers.

[0091] Figure 8 FIG. 1 is a block diagram of an active power control device in a grid-connected scenario according to an exemplary embodiment. Figure 8 As shown, the device 700 includes:

[0092] The receiving module 710 is used to obtain a power system dispatching instruction and determine a pre-configured active reference power according to the power system dispatching instruction;

[0093] The difference calculation module 720 is used to collect the actual active power output of the wind turbine generator grid connection point, and determine the first power difference according to the actual active power output and the active reference power;

[0094] A power calculation module 730, configured to determine a second power difference allocated to each wind turbine generator set according to the first power difference, and determine a target active power of the wind turbine generator set according to the second power difference;

[0095] The control module 740 is used to collect operating environment information of the wind turbine generator set, and adjust the state of the wind turbine generator set according to the operating environment information and the target active power of the wind turbine generator set so that the active power output by the wind turbine generator set reaches the target active power.

[0096] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0097] Fig. 9 is a block diagram of a device 800 according to an exemplary embodiment. Fig. 9 , the device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output (I / O) interface 812 , a sensor component 814 , and a communication component 816 .

[0098] The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0099] The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0100] The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

[0101] The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0102] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the device 800 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0103] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

[0104] The sensor assembly 814 includes one or more sensors for providing various aspects of status assessment for the device 800. For example, the sensor assembly 814 can detect the open / closed state of the device 800, the relative positioning of components, such as the display and keypad of the device 800, and the sensor assembly 814 can also detect the position change of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration / deceleration of the device 800, and the temperature change of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0105] The communication component 816 is configured to facilitate wired or wireless communication between the device 800 and other devices. The device 800 can access a wireless network based on a communication standard, such as WiFi, a carrier network (such as 2G, 3G, 4G or 5G), or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0106] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above method.

[0107] In an exemplary embodiment, a storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by the processor 820 of the device 800 to complete the above method. Optionally, the storage medium can be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0108] Fig.10 900 is a block diagram of a device 900 according to an exemplary embodiment. For example, the device 900 may be provided as a server. Fig.10 , the apparatus 900 includes a processing component 922, which further includes one or more processors, and a memory resource represented by a memory 932 for storing instructions, such as an application, that can be executed by the processing component 922. The application stored in the memory 932 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 922 is configured to execute the instructions to perform the above method.

[0109] The device 900 may also include a power supply component 926 configured to perform power management of the device 900, a wired or wireless network interface 950 configured to connect the device 900 to a network, and an input / output (I / O) interface 958. The device 900 may operate based on an operating system stored in the memory 932, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or the like.

[0110] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application 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 specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0111] 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.

Claims

1. A method for controlling active power in a grid-connected scenario, characterized in that: include: Obtaining a power system dispatch instruction, and determining a preconfigured active reference power according to the power system dispatch instruction; Collecting the actual active power output of the wind turbine generator grid connection point, and determining a first power difference according to the actual active power output and the active reference power; Determine a second power difference allocated to each wind turbine generator set according to the first power difference, and determine a target active power of the wind turbine generator set according to the second power difference; The operating environment information of the wind turbine generator set is collected, and the state of the wind turbine generator set is adjusted according to the operating environment information and the target active power of the wind turbine generator set so that the active power output by the wind turbine generator set reaches the target active power.

2. The method according to claim 1, characterized in that: The step of determining the first power difference according to the actual active output and the active reference power specifically includes: The active reference power is subtracted from the actual active output, and the result is used as the first power difference.

3. The method according to claim 1, characterized in that The step of determining the target active power of the wind turbine generator set according to the second power difference specifically includes: The second power difference is added to the active power currently output by the wind turbine generator set to determine the target active power.

4. The method according to claim 1, characterized in that The operating environment information of the wind turbine generator set specifically includes at least one of the following: Air density; swept area of ​​the wind turbine rotor; wind speed at the center of the wind turbine hub.

5. The method according to claim 4, characterized in that The step of adjusting the state of the wind turbine generator set according to the operating environment information and the target active power of the wind turbine generator set specifically includes: When the wind speed at the center of the hub of the wind turbine is in a preset low wind speed zone, the electromagnetic torque of the generator and the blade pitch angle of the wind turbine are adjusted to adjust the rotational angular velocity of the wind turbine blades to achieve the tip speed ratio of the wind rotor, so that the output power of the wind turbine reaches the target active power; When the wind speed at the center of the hub in the wind turbine generator set is in a preset high wind speed zone, the blade pitch angle of the wind turbine generator set is adjusted so that the output power of the wind turbine generator set reaches the target active power.

6. The method according to claim 5, characterized in that The active power output of the wind turbine is expressed as follows: Wherein, P is the active power output, R is the swept radius of the wind rotor, πR 2 is the swept area of ​​the rotor in the wind turbine, C p is the wind energy utilization coefficient, and v is the wind speed at the center of the hub in the wind turbine.

7. The method according to claim 6, characterized in that The formula for the relationship between the wind energy utilization coefficient, the blade pitch angle and the tip speed ratio is: Wherein, β is the blade pitch angle, λ is the tip speed ratio, and λ is the ratio of the tip linear velocity to the incoming wind speed during rotation. Where, ω is the rotational angular velocity of the fan blade, R is the swept surface radius of the wind wheel, and v w is the incoming wind speed.

8. An active power control device in a grid-connected scenario, characterized in that: include: A receiving module, used for obtaining a power system dispatching instruction, and determining a pre-configured active reference power according to the power system dispatching instruction; A difference calculation module, used for collecting the actual active power output of the wind turbine generator grid connection point, and determining a first power difference according to the actual active power output and the active reference power; a power calculation module, configured to determine a second power difference allocated to each wind turbine generator set according to the first power difference, and determine a target active power of the wind turbine generator set according to the second power difference; The control module is used to collect the operating environment information of the wind turbine set, and adjust the state of the wind turbine set according to the operating environment information and the target active power of the wind turbine set so that the active power output by the wind turbine set reaches the target active power.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 1 to 7. 10 . A computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method according to any one of claims 1 to 7.

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