A method, device and equipment for determining the power reduction operation condition of a variable pitch wind turbine

Abstract

This invention discloses a method, apparatus, and equipment for determining the power reduction operation status of variable pitch wind turbines, relating to the field of wind turbine operation and maintenance technology. The method involves, when the target variable pitch wind turbine is determined to be in the maximum power point tracking control range, constant speed control range, or constant power control range using the unit control strategy, first obtaining relevant data in real time from the wind farm energy management platform to determine whether the variable pitch wind turbine is operating with reduced power. Then, relevant data is obtained from the wind farm AGC system to further subdivide the reasons for the power reduction operation: external power curtailment or internal power curtailment. By replacing a single data source for judgment and combining multi-dimensional equipment data sources, the method determines whether the wind turbine is operating with reduced power and provides relevant factor orientations for the power reduction unit. This can accurately determine the power reduction operation status of variable pitch wind turbines, enriching the judgment results and meeting the needs of operation and maintenance units, facilitating practical application and promotion.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine operation and maintenance technology, specifically relating to a method, device and equipment for determining the power reduction operation of a variable pitch wind turbine. Background Technology

[0002] Variable pitch, also known as pitch angle adjustment, refers to the ability of blades mounted on the hub to change their pitch angle through control. During the operation of a variable pitch wind turbine, when the output power is less than the rated power, the pitch angle remains at zero degrees without any adjustment. Once the generator output power reaches the rated power, the control system adjusts the pitch angle according to the change in output power, maintaining the generator's output power at the rated power. At this point, the control system participates in the adjustment, forming a closed-loop control, thus overcoming many shortcomings of fixed pitch / passive stall regulation.

[0003] Currently, the data of variable pitch wind turbines is acquired through SCADA (Supervisory Control and Data Acquisition) systems or data forwarding services. Furthermore, the determination of derating operation is often based on the wind turbine status data. This faces challenges due to the classification rules involving multiple manufacturers and models, making it difficult for the internal logic of the turbines (such as determining derating operation when the rated power is less than the current operating condition setting) to meet the needs of turbine operation and maintenance.

[0004] Existing unit operation and maintenance systems primarily rely on energy management platforms to determine the power reduction status of units, typically using averaging or benchmarking algorithms. This leads to an inability to accurately assess the power limitation status of each unit across the entire site. Not only is there a problem of a single data source for unit operations, but it also fails to determine whether the power reduction is due to grid dispatching (i.e., external power curtailment) or inherent performance defects in the unit (i.e., internal power curtailment). Therefore, accurately determining the power reduction status of variable pitch wind turbines to enrich the assessment results and meet the needs of unit operation and maintenance is a crucial research topic for those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a method, device, computer equipment, computer-readable storage medium, and computer program product for determining the reduced power operation status of variable pitch wind turbines, so as to accurately determine the reduced power operation status of variable pitch wind turbines, thereby enriching the determination results and meeting the needs of operation and maintenance units.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, a method for determining the operation condition of a variable pitch wind turbine in a power reduction state is provided, including:

[0008] When it is determined by the unit control strategy that the target variable pitch wind turbine is in the maximum power tracking control range, the constant speed control range or the constant power control range, the real-time power average value of the target variable pitch wind turbine is obtained from the wind farm energy management platform in real time, and it is judged whether the real-time power average value is less than the rated power value of the target variable pitch wind turbine;

[0009] When it is determined that the real-time power average value is less than the rated power value, the average value of the blade angles of the target variable pitch wind turbine in the most recent 3 minutes is obtained from the unit control parameter data source, and it is judged whether the average value of the blade angles in the most recent 3 minutes is greater than a preset angle threshold;

[0010] When it is determined that the average value of the blade angles in the most recent 3 minutes is greater than the preset angle threshold, it is determined that the target variable pitch wind turbine is in the wind turbine power reduction state, and the AGC operation state, the full-field power value P21 issued by the AGC dispatching, the full-field rated capacity value P31, the average value P10 of the AGC theoretical power in the most recent 3 minutes, and the average value P11 of the AGC actual power in the most recent 3 minutes are obtained from the wind farm AGC system;

[0011] When it is determined that the AGC operation state is in operation, P21 < P31, and |P11 / P10| < 1.05, it is determined that the wind farm is in dispatching power curtailment and the target variable pitch wind turbine is in the wind turbine power reduction state due to off-site power curtailment, otherwise it is determined that the wind farm is not in dispatching power curtailment and the target variable pitch wind turbine is in the wind turbine power reduction state due to on-site power curtailment;

[0012] Output and display the wind turbine power reduction state of the target variable pitch wind turbine and its detailed reasons: off-site power curtailment or on-site power curtailment.

[0013] Based on the above invention content, a new solution for determining the power reduction operation situation of a variable pitch wind turbine and subdividing the reasons based on multi-source data is provided. That is, when it is determined by using the unit control strategy that the target variable pitch wind turbine is in the maximum power tracking control interval, the constant speed control interval or the constant power control interval, relevant data is first obtained from the wind farm energy management platform in real time to determine whether the variable pitch wind turbine has a power reduction operation. And when it is determined that there is a power reduction operation, relevant data is obtained from the wind farm AGC system to subdivide the reasons for the power reduction operation: off-site power rationing or on-site power rationing. In this way, by replacing the judgment of a single data source and combining multi-dimensional device data sources, it is determined whether the wind turbine unit has a power reduction operation, and relevant factors are given for the power reduction unit, so as to accurately determine the power reduction operation situation of the variable pitch wind turbine, enrich the judgment results and meet the needs of operating and maintaining the unit, and facilitate practical application and promotion.

[0014] In a possible design, the method further includes:

[0015] When it is determined by using the unit control strategy that the target variable pitch wind turbine is in the grid connection control interval, the wind turbine status word of the target variable pitch wind turbine is obtained from the unit control parameter data source in real time;

[0016] When the wind turbine status word is remote control, if an alarm message for the target variable pitch wind turbine received from the SCADA system or the centralized control monitoring system is received, the target variable pitch wind turbine is controlled to reduce power and stop, and the AGC operation status, the AGC dispatched full-field power value P21, the full-field rated capacity value P31, and the average value P10 of the AGC theoretical power in the recent 3 minutes are also obtained from the wind farm AGC system;

[0017] When it is determined that the AGC operation status is in operation, P21 < P31, and |P21 / P10| < 1.05, it is determined that the wind farm is under dispatching power rationing and the target variable pitch wind turbine is in the wind turbine power reduction and stop state due to off-site power rationing. Otherwise, it is determined that the wind farm is not under dispatching power rationing and the target variable pitch wind turbine is in the wind turbine power reduction and stop state due to on-site power rationing;

[0018] The wind turbine power reduction and stop state of the target variable pitch wind turbine and its subdivided reasons: off-site power rationing or on-site power rationing are output and displayed.

[0019] In a possible design, the alarm message includes an alarm message triggered due to vibration overrun and / or temperature overrun. [[ID=二十]]<00.

[0020] In a possible design, the unit control strategy includes:

[0021] Judge whether the average value of the real-time wind speed is greater than or equal to the preset cut-in wind speed value; <00.

[0022] When it is determined that the real-time average wind speed is greater than or equal to the cut-in wind speed, it is further determined whether the real-time average power of the target variable pitch wind turbine is greater than a preset power threshold and whether the wind turbine status word of the target variable pitch wind turbine is grid-connected power generation.

[0023] When it is determined that the real-time average power is greater than the preset power threshold and the wind turbine status word is grid-connected power generation, it is further determined whether the real-time average wind speed is greater than or equal to the preset full-load wind speed value, wherein the full-load wind speed value is greater than the cut-in wind speed value.

[0024] When it is determined that the real-time average wind speed is greater than or equal to the full-power wind speed, it is further determined whether the real-time average wind speed is greater than or equal to the preset cut-out wind speed. If so, the target variable pitch wind turbine is switched to the wind speed cut-out control range; otherwise, the target variable pitch wind turbine is switched to the power constant control range, wherein the cut-out wind speed is greater than the full-power wind speed.

[0025] When it is determined that the real-time average wind speed is less than the full-load wind speed, the target variable pitch wind turbine is switched to the maximum power point tracking control range, and it is further determined whether the real-time average speed of the target variable pitch wind turbine is greater than or equal to the preset rated speed.

[0026] When it is determined that the real-time average speed is greater than or equal to the rated speed, the target variable pitch wind turbine is switched to the constant speed control range, and it is further determined whether the maximum power value of the target variable pitch wind turbine when it is in the maximum power tracking control range is greater than or equal to the real-time average power.

[0027] When the maximum power value is determined to be greater than or equal to the real-time average power value, the target variable pitch wind turbine is switched to the constant power control range.

[0028] In one possible design, the unit control strategy also includes:

[0029] When it is determined that the real-time average wind speed is less than the cut-in wind speed, the target variable pitch wind turbine is switched to the standby control range.

[0030] In one possible design, the unit control strategy also includes:

[0031] When it is determined that the real-time average power is less than or equal to the preset power threshold and / or the wind turbine status word is not grid-connected, the target variable pitch wind turbine is switched to the grid-connected control range.

[0032] In a second aspect, a device for determining the power reduction operation condition of a variable pitch fan is provided, including a power judgment module, an angle judgment module, an AGC data acquisition module, a detailed cause judgment module, and a judgment result output module that are communicatively connected in sequence;

[0033] The power judgment module is configured to, when it is determined by using the unit control strategy that the target variable pitch fan is in the maximum power tracking control range, the constant speed control range, or the constant power control range, obtain the real-time power average value of the target variable pitch fan from the wind farm energy management platform in real time, and judge whether the real-time power average value is less than the rated power value of the target variable pitch fan;

[0034] The angle judgment module is configured to, when it is determined that the real-time power average value is less than the rated power value, obtain the average value of the blade angle of the target variable pitch fan within the last 3 minutes from the unit control parameter data source, and judge whether the average value of the blade angle within the last 3 minutes is greater than a preset angle threshold;

[0035] The AGC data acquisition module is configured to, when it is determined that the average value of the blade angle within the last 3 minutes is greater than the preset angle threshold, determine that the target variable pitch fan is in the fan power reduction state, and obtain the AGC operation state, the full-field power value P21 dispatched by the AGC, the full-field rated capacity value P31, the average value P10 of the AGC theoretical power within the last 3 minutes, and the average value P11 of the AGC actual power within the last 3 minutes from the wind farm AGC system;

[0036] The detailed cause judgment module is configured to, when it is determined that the AGC operation state is in operation, P21 < P31, and |P11 / P10| < 1.05, determine that the wind farm is under dispatching power limit and the target variable pitch fan is in the fan power reduction state due to off-site power limit, otherwise determine that the wind farm is not under dispatching power limit and the target variable pitch fan is in the fan power reduction state due to on-site power limit;

[0037] The judgment result output module is configured to output and display the fan power reduction state of the target variable pitch fan and its detailed cause: off-site power limit or on-site power limit.

[0038] In a third aspect, the present invention provides a computer device, including a memory, a processor, and a transceiver that are communicatively connected in sequence. Among them, the memory is used to store a computer program, the transceiver is used to send and receive messages, and the processor is used to read the computer program and execute the method for determining the power reduction operation condition of the variable pitch fan as described in the first aspect or any possible design in the first aspect.

[0039] Fourthly, the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, perform the variable pitch wind turbine power reduction determination method as described in the first aspect or any possible design in the first aspect.

[0040] Fifthly, the present invention provides a computer program product, including a computer program or instructions, wherein when the computer program or instructions are executed by a computer, the method for determining the power reduction operation of a variable pitch wind turbine as described in the first aspect or any possible design in the first aspect is implemented.

[0041] The beneficial effects of the above scheme are:

[0042] (1) This invention creatively provides a new scheme for determining the power reduction operation of variable pitch wind turbines and subdividing the causes based on multi-source data. That is, when the target variable pitch wind turbine is determined to be in the maximum power tracking control range, constant speed control range or constant power control range by adopting the unit control strategy, relevant data is first obtained from the wind farm energy management platform in real time to determine whether the variable pitch wind turbine is operating with reduced power. At this time, relevant data is obtained from the wind farm AGC system to subdivide the causes of power reduction operation: external power restriction or internal power restriction. In this way, by replacing the single data source judgment and combining multi-dimensional equipment data sources, it is determined whether the wind turbine is operating with reduced power, and relevant factors are given to the power reduction unit. The power reduction operation of variable pitch wind turbines can be accurately determined, so as to enrich the judgment results and meet the needs of operation and maintenance units, and facilitate practical application and promotion.

[0043] (2) It can also perform shutdown control and subdivide the shutdown reasons when the wind turbine is in the grid-connected control range, further enriching the judgment results and meeting the needs of operation and maintenance units. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a flowchart illustrating the method for determining the power reduction operation of a variable pitch wind turbine provided in an embodiment of this application.

[0046] Figure 2 A schematic diagram of the structure of the variable pitch wind turbine power reduction operation determination device provided in the embodiments of this application.

[0047] Figure 3A schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0049] It should be understood that although the terms "first" and "second", etc., may be used herein to describe various objects, these objects should not be limited by these terms. These terms are only used to distinguish one object from another. For example, the first object may be referred to as the second object, and similarly, the second object may be referred to as the first object, without departing from the scope of the exemplary embodiments of the invention.

[0050] It should be understood that the term "and / or" that may appear in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, or A and B exist simultaneously. Another example is A, B and / or C, which can mean that any one of A, B, and C or any combination thereof exists. The term " / and" that may appear in this document describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone or A and B exist simultaneously. In addition, the character " / " that may appear in this document generally indicates that the related objects before and after it are in an "or" relationship.

[0051] Example:

[0052] like Figure 1 As shown, the method for determining the power reduction operation of a variable pitch wind turbine provided in the first aspect of this embodiment can be executed, but is not limited to, by a computer device with certain computing resources, such as by an electronic device like a platform server. Figure 1 As shown, the method for determining the reduced power operation of the variable pitch wind turbine may include, but is not limited to, the following steps S1 to S5.

[0053] S1. When the target variable pitch wind turbine is determined to be in the maximum power tracking control range, constant speed control range, or constant power control range using the unit control strategy, the real-time average power of the target variable pitch wind turbine is obtained from the wind farm energy management platform in real time, and it is determined whether the real-time average power is less than the rated power value of the target variable pitch wind turbine.

[0054] In step S1, based on the control characteristics of the variable pitch wind turbine, the control can be divided into the following six control intervals: standby control interval, grid-connected control interval, maximum power point tracking (MPPT) control interval, constant speed control interval, constant power control interval, and wind speed cut-off control interval. In the standby control interval and the grid-connected control interval, the turbine power is less than or equal to 0. In the maximum power point tracking (MPPT) control interval, the turbine power is less than the rated power, and the controller will set the pitch angle near 0° without adjustment, which is equivalent to a fixed pitch wind turbine, maintaining a constant optimal tip speed ratio (MPPT). Point tracking (MPPT) is used to match the turbine's rotational speed and perform maximum power tracking to capture maximum wind energy. After the MPPT tracking interval ends, the turbine enters the constant rotational speed control interval, where the rotational speed is kept constant, the rotor excitation current is increased, and the power increases with the wind speed. If the real-time wind speed in the constant power control interval is greater than the rated wind speed, the turbine controls the pitch angle to maintain a constant angle of attack, reducing the turbine load and maintaining constant power. If the real-time wind speed outside the control interval is greater than the turbine's maximum wind speed, the turbine will shut down for protection. To facilitate later power trading or refined management under the overall active power distribution algorithm, reduce wind resource waste, rationally plan power allocation, and maximize regional benefits, the preferred turbine control strategy includes, but is not limited to, the following steps S11 to S17.

[0055] S11. Determine whether the real-time average wind speed is greater than or equal to the preset cut-in wind speed value.

[0056] S12. When it is determined that the real-time average wind speed is greater than or equal to the cut-in wind speed value, further determine whether the real-time average power of the target variable pitch wind turbine is greater than a preset power threshold and whether the wind turbine status word of the target variable pitch wind turbine is grid-connected power generation.

[0057] In step S12, the preset power threshold is, for example, 100W. Furthermore, when the real-time average wind speed is determined to be less than the cut-in wind speed, the target variable pitch wind turbine is switched to the standby control range; and when the real-time average power is determined to be less than or equal to the preset power threshold and / or the wind turbine status word is not grid-connected, the target variable pitch wind turbine is switched to the grid-connected control range.

[0058] S13. When it is determined that the real-time average power is greater than the preset power threshold and the wind turbine status word is grid-connected power generation, it is further determined whether the real-time average wind speed is greater than or equal to the preset full-load wind speed value, wherein the full-load wind speed value is greater than the cut-in wind speed value.

[0059] S14. When it is determined that the real-time average wind speed is greater than or equal to the full-power wind speed, it is further determined whether the real-time average wind speed is greater than or equal to the preset cut-out wind speed. If so, the target variable pitch wind turbine is switched to the wind speed cut-out control range; otherwise, the target variable pitch wind turbine is switched to the power constant control range, wherein the cut-out wind speed is greater than the full-power wind speed.

[0060] S15. When it is determined that the real-time average wind speed is less than the full-power wind speed, the target variable pitch wind turbine is switched to the maximum power tracking control range, and it is further determined whether the real-time average speed of the target variable pitch wind turbine is greater than or equal to the preset rated speed.

[0061] S16. When it is determined that the real-time average speed is greater than or equal to the rated speed, the target variable pitch wind turbine is switched to the constant speed control range, and it is further determined whether the maximum power value of the target variable pitch wind turbine when it is in the maximum power tracking control range is greater than or equal to the real-time average power.

[0062] S17. When it is determined that the maximum power value is greater than or equal to the real-time average power value, the target variable pitch wind turbine is switched to the constant power control range.

[0063] S2. When it is determined that the real-time power average value is less than the rated power value, the average value of the blade angle of the target variable pitch wind turbine in the last 3 minutes is obtained from the unit control parameter data source, and it is determined whether the average value of the blade angle in the last 3 minutes is greater than the preset angle threshold.

[0064] In step S2, the preset angle threshold is, for example, 1 degree. Furthermore, when the real-time average power value is determined to be greater than or equal to the rated power value, the target variable pitch wind turbine is determined to be in normal operating condition.

[0065] S3. When it is determined that the average value of the blade angle in the last 3 minutes is greater than the preset angle threshold, the target variable pitch wind turbine is determined to be in a wind turbine power reduction state, and the AGC commissioning status, the AGC dispatched total power value P21, the total rated capacity value P31, the average value of the theoretical power of AGC in the last 3 minutes P10, and the average value of the actual power of AGC in the last 3 minutes P11 are obtained from the wind farm AGC system.

[0066] In the step S3, the wind farm AGC system refers to the Automatic Generation Control (AGC) system of the wind farm, which is an important function in the energy management system. It controls the output of the frequency modulation units to meet the continuously changing power demands of users and keep the system in an economic operating state. Therefore, the AGC operation status, the full-field power value P21 dispatched by the AGC, the full-field rated capacity value P31, the average value P10 of the AGC theoretical power in the last 3 minutes, and the average value P11 of the AGC actual power in the last 3 minutes can be obtained through regular access. (These terms are all common existing terms in the AGC system. For example, the average value of the AGC theoretical power in the last 3 minutes refers to the average value of the AGC theoretical power in the last 3 minutes, and the average value of the AGC actual power in the last 3 minutes refers to the average value of the AGC actual power in the last 3 minutes).

[0067] S4. When it is determined that the AGC operation status is in operation, P21 < P31, and |P11 / P10| < 1.05, it is determined that the wind farm is under dispatching power curtailment and the target variable pitch fan is in the fan power reduction state due to off-site power curtailment. Otherwise, it is determined that the wind farm is not under dispatching power curtailment and the target variable pitch fan is in the fan power reduction state due to on-site power curtailment.

[0068] S5. Output and display the fan power reduction state of the target variable pitch fan and its detailed reasons: off-site power curtailment or on-site power curtailment.

[0069] Based on the method for determining the power reduction operation of the variable pitch fan described in the foregoing steps S1 to S5, a new solution for determining the power reduction operation of the variable pitch fan and subdividing the reasons based on multi-source data is provided. That is, when it is determined by using the unit control strategy that the target variable pitch fan is in the maximum power tracking control interval, the constant speed control interval, or the constant power control interval, relevant data is first obtained from the wind farm energy management platform in real time to determine whether the variable pitch fan has a power reduction operation. And when it is, relevant data is obtained from the wind farm AGC system to subdivide the reasons for the power reduction operation: off-site power curtailment or on-site power curtailment. In this way, by replacing the single data source judgment and combining multi-dimensional device data sources, it can be determined whether the wind turbine unit has a power reduction operation, and the relevant factors can be given for the power reduction unit, so as to accurately determine the power reduction operation of the variable pitch fan, enrich the judgment results and meet the needs of operating and maintaining the unit, and facilitate practical application and promotion.

[0070] Based on the technical solution of the foregoing first aspect, this embodiment also provides a possible design for how to perform shutdown control and subdivide the shutdown reasons when the fan is in the grid connection control interval. That is, the method further includes but is not limited to the following steps S6 to S9.

[0071] S6. When it is determined that the target variable pitch fan is in the grid connection control interval by adopting the unit control strategy, the fan status word of the target variable pitch fan is obtained from the unit control parameter data source in real time.

[0072] S7. When the fan status word is in remote control, if an alarm message for the target variable pitch fan is received from the SCADA system or the centralized control monitoring system, the target variable pitch fan is controlled to reduce power and stop, and the AGC operation status, the AGC dispatching full-field power value P21, the full-field rated capacity value P31, and the average value P10 of the AGC theoretical power in the recent 3 minutes are also obtained from the wind farm AGC system.

[0073] In step S7, the alarm message specifically includes, but is not limited to, alarm messages triggered by vibration overrun and / or temperature overrun.

[0074] S8. When it is determined that the AGC operation status is in operation, P21 < P31, and |P21 / P10| < 1.05, it is determined that the wind farm is under dispatching power limit and the target variable pitch fan is in the fan power reduction and stop state due to off-site power limit; otherwise, it is determined that the wind farm is not under dispatching power limit and the target variable pitch fan is in the fan power reduction and stop state due to on-site power limit.

[0075] S9. Output and display the fan power reduction and stop state of the target variable pitch fan and its detailed reasons: off-site power limit or on-site power limit.

[0076] Based on the foregoing possible design 1, it is also possible to perform shutdown control and breakdown of shutdown reasons when the fan is in the grid connection control interval, further enriching the determination results and meeting the needs of operation and maintenance of the unit.

[0077] As Figure 2 shown, in the second aspect of this embodiment, a virtual device for implementing the method for determining the power reduction operation of the variable pitch fan according to the first aspect or the possible design Ⅰ in the first aspect is provided, including a power judgment module, an angle judgment module, an AGC data acquisition module, a breakdown reason judgment module, and a judgment result output module that are sequentially communicatively connected;

[0078] The power judgment module is used to obtain the real-time power average value of the target variable pitch fan from the wind farm energy management platform in real time when it is determined that the target variable pitch fan is in the maximum power tracking control interval, the constant speed control interval, or the constant power control interval by adopting the unit control strategy, and judge whether the real-time power average value is less than the rated power value of the target variable pitch fan.

[0079] The angle judgment module is used to obtain the average value of the blade angles of the target variable-pitch fan within the most recent 3 minutes from the unit control parameter data source when it is determined that the real-time power average value is less than the rated power value, and judge whether the average value of the blade angles within the most recent 3 minutes is greater than a preset angle threshold;

[0080] The AGC data acquisition module is used to determine that the target variable-pitch fan is in the fan power reduction state when it is determined that the average value of the blade angles within the most recent 3 minutes is greater than the preset angle threshold, and obtain the AGC operation state, the full-field power value P21 dispatched by AGC, the full-field rated capacity value P31, the average value P10 of the AGC theoretical power within the most recent 3 minutes, and the average value P11 of the AGC actual power within the most recent 3 minutes from the wind farm AGC system;

[0081] The detailed cause judgment module is used to determine that the wind farm is under dispatching power curtailment and the target variable-pitch fan is in the fan power reduction state due to off-site power curtailment when it is determined that the AGC operation state is in operation, P21 < P31, and |P11 / P10| < 1.05; otherwise, it is determined that the wind farm is not under dispatching power curtailment and the target variable-pitch fan is in the fan power reduction state due to on-site power curtailment;

[0082] The determination result output module is used to output and display the fan power reduction state of the target variable-pitch fan and its detailed cause: off-site power curtailment or on-site power curtailment.

[0083] For the working process, working details and technical effects of the foregoing device provided in the second aspect of this embodiment, reference can be made to the first aspect or the variable-pitch fan power reduction operation condition determination method described in the first aspect, which will not be elaborated herein.

[0084] As Figure 3As shown, the third aspect of this embodiment provides a computer device for executing the variable pitch wind turbine power reduction operation determination method as described in the first aspect or possibly designed in the first aspect. The device includes a memory, a processor, and a transceiver connected in sequence. The memory stores a computer program, the transceiver sends and receives messages, and the processor reads the computer program and executes the variable pitch wind turbine power reduction operation determination method as described in the first aspect or possibly designed in the first aspect. Specifically, the memory may include, but is not limited to, random-access memory (RAM), read-only memory (ROM), flash memory, first-in-first-out (FIFO) memory, and / or first-in-last-out (FILO) memory, etc.; the processor may include, but is not limited to, a microprocessor of the STM32F105 series. Furthermore, the computer device may also include, but is not limited to, a power module, a display screen, and other necessary components.

[0085] The working process, working details and technical effects of the aforementioned computer equipment provided in the third aspect of this embodiment can be found in the first aspect or the variable pitch wind turbine power reduction operation determination method that may be designed in the first aspect, and will not be repeated here.

[0086] This fourth aspect of the embodiment provides a computer-readable storage medium storing instructions comprising a method for determining the power reduction operation of a variable pitch wind turbine as described in the first aspect or possibly designed in the first aspect. Specifically, the computer-readable storage medium stores instructions that, when executed on a computer, perform the method for determining the power reduction operation of a variable pitch wind turbine as described in the first aspect or possibly designed in the first aspect. The computer-readable storage medium refers to a data storage medium, which may include, but is not limited to, floppy disks, optical disks, hard disks, flash memory, USB flash drives, and / or Memory Sticks. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0087] The working process, working details and technical effects of the aforementioned computer-readable storage medium provided in the fourth aspect of this embodiment can be found in the method for determining the power reduction operation of variable pitch wind turbines as described in the first aspect or possibly designed in the first aspect, and will not be repeated here.

[0088] This fifth aspect of the embodiment provides a computer program product, including a computer program or instructions, which, when executed by a computer, implement the variable pitch wind turbine power reduction operation determination method as described in the first aspect or possibly designed in the first aspect. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.

[0089] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for determining the power reduction operation status of a variable pitch wind turbine, characterized in that, Including: When it is determined that the target variable pitch fan is in the maximum power tracking control range, the constant speed control range or the constant power control range by adopting the unit control strategy, the real-time power average value of the target variable pitch fan is obtained from the wind farm energy management platform in real time, and it is judged whether the real-time power average value is less than the rated power value of the target variable pitch fan; When it is determined that the real-time power average value is less than the rated power value, the average value of the blade angles of the target variable pitch fan in the most recent 3 minutes is obtained from the unit control parameter data source, and it is judged whether the average value of the blade angles in the most recent 3 minutes is greater than a preset angle threshold; When it is determined that the average value of the blade angles in the most recent 3 minutes is greater than the preset angle threshold, it is determined that the target variable pitch fan is in the fan power reduction state, and the AGC operation state, the AGC dispatched full-field power value P21, the full-field rated capacity value P31, the average value P10 of the AGC theoretical power in the most recent 3 minutes, and the average value P11 of the AGC actual power in the most recent 3 minutes are obtained from the wind farm AGC system; When it is determined that the AGC operation state is in operation, P21 < P31, and |P11 / P10| < 1.05, it is determined that the wind farm is under dispatching power curtailment and the target variable pitch fan is in the fan power reduction state due to off-site power curtailment, otherwise it is determined that the wind farm is not under dispatching power curtailment and the target variable pitch fan is in the fan power reduction state due to on-site power curtailment; Output and display the fan power reduction state of the target variable pitch fan and its detailed reasons: off-site power curtailment or on-site power curtailment.

2. The method for determining the power reduction operation of a variable pitch wind turbine according to claim 1, characterized in that, The method further includes: When it is determined that the target variable pitch fan is in the grid connection control range by adopting the unit control strategy, the fan status word of the target variable pitch fan is obtained from the unit control parameter data source in real time; When the fan status word is remote control, if an alarm message for the target variable pitch fan is received from the SCADA system or the centralized control monitoring system, the target variable pitch fan is controlled to reduce power and stop, and the AGC operation state, the AGC dispatched full-field power value P21, the full-field rated capacity value P31, and the average value P10 of the AGC theoretical power in the most recent 3 minutes are also obtained from the wind farm AGC system; When it is determined that the AGC operation state is in operation, P21 < P31, and |P21 / P10| < 1.05, it is determined that the wind farm is under dispatching power curtailment and the target variable pitch fan is in the fan power reduction and stop state due to off-site power curtailment, otherwise it is determined that the wind farm is not under dispatching power curtailment and the target variable pitch fan is in the fan power reduction and stop state due to on-site power curtailment; Output and display the fan power reduction and stop state of the target variable pitch fan and its detailed reasons: off-site power curtailment or on-site power curtailment.

3. The method for determining the power reduction operation of a variable pitch wind turbine according to claim 2, characterized in that, The alarm message includes an alarm message triggered due to vibration overrun and / or temperature overrun.

4. The method for determining the power reduction operation of a variable pitch wind turbine according to claim 1, characterized in that, The unit control strategy includes: Judging whether the average value of the real-time wind speed is greater than or equal to a preset cut-in wind speed value; When it is determined that the real-time average wind speed is greater than or equal to the cut-in wind speed, it is further determined whether the real-time average power of the target variable pitch wind turbine is greater than a preset power threshold and whether the wind turbine status word of the target variable pitch wind turbine is grid-connected power generation. When it is determined that the real-time average power is greater than the preset power threshold and the wind turbine status word is grid-connected power generation, it is further determined whether the real-time average wind speed is greater than or equal to the preset full-load wind speed value, wherein the full-load wind speed value is greater than the cut-in wind speed value. When it is determined that the real-time average wind speed is greater than or equal to the full-power wind speed, it is further determined whether the real-time average wind speed is greater than or equal to the preset cut-out wind speed. If so, the target variable pitch wind turbine is switched to the wind speed cut-out control range; otherwise, the target variable pitch wind turbine is switched to the power constant control range, wherein the cut-out wind speed is greater than the full-power wind speed. When it is determined that the real-time average wind speed is less than the full-load wind speed, the target variable pitch wind turbine is switched to the maximum power point tracking control range, and it is further determined whether the real-time average speed of the target variable pitch wind turbine is greater than or equal to the preset rated speed. When it is determined that the real-time average speed is greater than or equal to the rated speed, the target variable pitch wind turbine is switched to the constant speed control range, and it is further determined whether the maximum power value of the target variable pitch wind turbine when it is in the maximum power tracking control range is greater than or equal to the real-time average power. When the maximum power value is determined to be greater than or equal to the real-time average power value, the target variable pitch wind turbine is switched to the constant power control range.

5. The method for determining the power reduction operation of a variable pitch wind turbine according to claim 4, characterized in that, The unit control strategy also includes: When it is determined that the real-time average wind speed is less than the cut-in wind speed, the target variable pitch wind turbine is switched to the standby control range.

6. The method for determining the power reduction operation of a variable pitch wind turbine according to claim 4, characterized in that, The unit control strategy also includes: When it is determined that the real-time average power is less than or equal to the preset power threshold and / or the wind turbine status word is not grid-connected, the target variable pitch wind turbine is switched to the grid-connected control range.

7. A device for determining the power reduction operation status of a variable pitch wind turbine, characterized in that, It includes a power judgment module, an angle judgment module, an AGC data acquisition module, a detailed cause judgment module, and a judgment result output module that are connected in sequence. The power judgment module is used to obtain the real-time average power of the target variable pitch wind turbine from the wind farm energy management platform in real time when the target variable pitch wind turbine is determined to be in the maximum power tracking control range, constant speed control range, or constant power control range by adopting the unit control strategy, and to determine whether the real-time average power is less than the rated power value of the target variable pitch wind turbine. The angle judgment module is used to obtain the average value of the blade angle of the target variable pitch wind turbine in the last 3 minutes from the unit control parameter data source when it is determined that the real-time power average value is less than the rated power value, and to determine whether the average value of the blade angle in the last 3 minutes is greater than a preset angle threshold. The AGC data acquisition module is used to determine that the target variable pitch fan is in the fan power reduction state when it is determined that the average value of the blade angle in the most recent 3 minutes is greater than the preset angle threshold, and obtain the AGC operation state, the AGC-scheduled full-field power value P21, the full-field rated capacity value P31, the average value of the AGC theoretical power in the most recent 3 minutes P10, and the average value of the AGC actual power in the most recent 3 minutes P11 from the wind farm AGC system; The detailed cause judgment module is used to determine that the wind farm is under dispatching power curtailment and the target variable pitch fan is in the fan power reduction state due to off-site power curtailment when it is determined that the AGC operation state is in operation, P21 < P; The determination result output module is used to output and display the fan power reduction state of the target variable pitch fan and its detailed cause: off-site power curtailment or on-site power curtailment; 8. A computer device, characterized in that, It includes a memory, a processor, and a transceiver that are sequentially communicatively connected. Among them, the memory is used to store computer programs, the transceiver is used to send and receive messages, and the processor is used to read the computer programs and execute the method for determining the operation condition of the variable pitch fan power reduction as described in any one of claims 1 to 6; 9. A computer-readable storage medium, characterized in that... Instructions are stored on the computer-readable storage medium, and when the instructions are run on the computer, the method for determining the operation condition of the variable pitch fan power reduction as described in any one of claims 1 to 6 is executed; 10. A computer program product, comprising a computer program or instructions, characterized in that, The computer program or the instructions implement the method for determining the operation condition of the variable pitch fan power reduction as described in any one of claims 1 to 6 when executed by the computer;

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