Wind power plant unit group frequency coordination control method and device

Abstract

The invention provides a wind power plant unit group frequency coordination control method and device, and relates to the technical field of control. The method comprises the following steps: clustering each unit according to a maximum frequency modulation potential time sequence curve corresponding to each unit in a wind power plant to obtain each unit group; according to the maximum frequency modulation potential time sequence curve in each unit group, the number of fans in each unit group and the primary frequency modulation active power adjusting quantity of the wind power plant, calculating to obtain unit group active power adjusting quantity corresponding to each unit group; and taking the active power regulation quantity of each unit group as a unit group frequency coordination control target, and performing frequency modulation control on each unit in the unit group according to a preset unit frequency modulation strategy in the unit group. The device executes the method. According to the wind power plant unit group frequency coordination control method and device provided by the embodiment of the invention, the adaptability and effectiveness of wind power plant frequency control can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of control technology, and in particular to a method and device for coordinated frequency control of a wind farm group. Background Art

[0002] Frequency fluctuations have a serious impact on the power quality and power balance of the system. The fundamental reason for frequency fluctuations is the imbalance between the system's power generation output and load power, and the uncertainty and volatility between the source and the load exacerbate this problem. As the capacity of wind power connected to the grid continues to increase, the power system faces increasingly severe frequency stability issues.

[0003] Primary frequency regulation can quickly respond to compensate for the active power imbalance between sources and loads, and can effectively support the frequency stability of the new energy power system. In order to make up for the insufficient frequency regulation capacity caused by large-scale wind power access, it is necessary to develop the frequency support capacity of new energy sites such as wind farms. Therefore, it is necessary to construct a frequency coordination control method for wind farms based on frequency regulation evaluation indicators. The existing technology has the following two problems:

[0004] First, there is a lack of consideration of the uncertainty in wind power forecasting when evaluating wind power frequency support capabilities; second, there is a lack of multi-layer fleet control that clusters the frequency regulation potential of units. Summary of the invention

[0005] In view of the problems in the prior art, an embodiment of the present invention provides a method and device for coordinated frequency control of a wind farm group, which can at least partially solve the problems in the prior art.

[0006] On the one hand, the present invention provides a wind farm group frequency coordination control method, comprising:

[0007] Clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group;

[0008] According to the maximum frequency regulation potential time series curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated;

[0009] The active power adjustment amount of each unit group is used as the frequency coordination control target of the unit group, and the frequency of each unit in the unit group is controlled according to the preset unit frequency regulation strategy within the unit group.

[0010] The clustering of each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm includes:

[0011] Determine a frequency modulation potential similarity measurement function according to a first similarity calculation index corresponding to distance similarity and a second similarity calculation index corresponding to direction similarity; the distance similarity is the distance similarity between wind speed curves associated with the maximum frequency modulation potential time series curve; the direction similarity is the direction similarity between wind speed curves associated with the maximum frequency modulation potential time series curve;

[0012] Each unit is clustered according to the frequency modulation potential similarity measurement function.

[0013] The first similarity calculation index is Euclidean distance, and the second similarity calculation index is cosine similarity.

[0014] The active power regulation amount of the unit group corresponding to each unit group is calculated based on the maximum frequency regulation potential timing curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, including:

[0015] According to the maximum frequency regulation potential time series curves in each unit group and the number of fans in each unit group, the unit group allocation factors corresponding to each unit group are calculated;

[0016] The active power regulation amount of each generator group is calculated according to the allocation factor of each generator group and the primary frequency regulation active power regulation amount of the wind farm.

[0017] The method of taking the active power adjustment amount of each unit group as the unit group frequency coordination control target and performing frequency control on each unit in the unit group according to the preset unit frequency regulation strategy in the unit group includes:

[0018] Sorting the units in each unit group in descending order of response speed or power ramp speed to obtain a first sorting sequence or a second sorting sequence;

[0019] Select the front part of the units from the first sorting sequence or the second sorting sequence, and perform frequency modulation control on the part of the units; the sum of the active power adjustment amounts of the part of the units meets the frequency coordination control target of the unit group.

[0020] Among them, obtaining each maximum frequency modulation potential timing curve includes:

[0021] Calculate the average time from the preset time to the end of a frequency regulation for the power of each unit corresponding to each unit;

[0022] Obtain the maximum predicted output value of each unit in the period corresponding to the preset time and each average time;

[0023] The difference between each maximum predicted output value and the actual output value of each unit corresponding to each unit is used as the maximum frequency regulation potential timing curve.

[0024] On the one hand, the present invention provides a wind farm group frequency coordination control device, comprising:

[0025] A clustering unit is used to cluster each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group;

[0026] A calculation unit, for calculating the active power regulation amount of each unit group corresponding to each unit group according to each maximum frequency regulation potential timing curve in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm;

[0027] The control unit is used to use the active power adjustment amount of each unit group as the unit group frequency coordination control target, and to perform frequency regulation control on each unit in the unit group according to the preset unit frequency regulation strategy in the unit group.

[0028] Wherein, the clustering unit is specifically used for:

[0029] Determine a frequency modulation potential similarity measurement function according to a first similarity calculation index corresponding to distance similarity and a second similarity calculation index corresponding to direction similarity; the distance similarity is the distance similarity between wind speed curves associated with the maximum frequency modulation potential time series curve; the direction similarity is the direction similarity between wind speed curves associated with the maximum frequency modulation potential time series curve;

[0030] Each unit is clustered according to the frequency modulation potential similarity measurement function.

[0031] The first similarity calculation index is Euclidean distance, and the second similarity calculation index is cosine similarity.

[0032] Wherein, the computing unit is specifically used for:

[0033] According to the maximum frequency regulation potential time series curves in each unit group and the number of fans in each unit group, the unit group allocation factors corresponding to each unit group are calculated;

[0034] The active power regulation amount of each generator group is calculated according to the allocation factor of each generator group and the primary frequency regulation active power regulation amount of the wind farm.

[0035] Wherein, the control unit is specifically used for:

[0036] Sorting the units in each unit group in descending order of response speed or power ramp speed to obtain a first sorting sequence or a second sorting sequence;

[0037] Select the front part of the units from the first sorting sequence or the second sorting sequence, and perform frequency modulation control on the part of the units; the sum of the active power adjustment amounts of the part of the units meets the frequency coordination control target of the unit group.

[0038] Wherein, the wind farm group frequency coordination control device is also used for:

[0039] Calculate the average time from the preset time to the end of a frequency regulation for the power of each unit corresponding to each unit;

[0040] Obtain the maximum predicted output value of each unit in the period corresponding to the preset time and each average time;

[0041] The difference between each maximum predicted output value and the actual output value of each unit corresponding to each unit is used as the maximum frequency regulation potential timing curve.

[0042] In another aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory, and a bus, wherein:

[0043] The processor and the memory communicate with each other via the bus;

[0044] The memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the following method:

[0045] Clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group;

[0046] According to the maximum frequency regulation potential time series curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated;

[0047] The active power adjustment amount of each unit group is used as the frequency coordination control target of the unit group, and the frequency of each unit in the unit group is controlled according to the preset unit frequency regulation strategy within the unit group.

[0048] An embodiment of the present invention provides a non-transitory computer-readable storage medium, including:

[0049] The non-transitory computer-readable storage medium stores computer instructions, which cause the computer to execute the following method:

[0050] Clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group;

[0051] According to the maximum frequency regulation potential time series curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated;

[0052] The active power adjustment amount of each unit group is used as the frequency coordination control target of the unit group, and the frequency of each unit in the unit group is controlled according to the preset unit frequency regulation strategy within the unit group.

[0053] The wind farm group frequency coordination control method and device provided in the embodiment of the present invention clusters each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm to obtain each unit group; according to each maximum frequency regulation potential timing curve in each unit group, the number of wind turbines in each unit group and the wind farm primary frequency regulation active power adjustment amount, the unit group active power adjustment amount corresponding to each unit group is calculated; the active power adjustment amount of each unit group is used as the unit group frequency coordination control target, and the frequency regulation strategy of the unit in the preset unit group is used to control the units in the unit group, which can effectively improve the adaptability and effectiveness of wind farm frequency control. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0055] Figure 1 It is a flow chart of a frequency coordination control method for a wind farm group provided in one embodiment of the present invention.

[0056] Figure 2 It is a flow chart of a wind farm group frequency coordination control method provided by another embodiment of the present invention.

[0057] Figure 3 It is a schematic diagram for explaining a method for implementing frequency coordination control of a wind farm group based on a hierarchical control architecture provided in an embodiment of the present invention.

[0058] Figure 4 It is a structural schematic diagram of a wind farm group frequency coordination control device provided by an embodiment of the present invention.

[0059] Figure 5 A schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily.

[0061] Figure 1 FIG. 1 is a flow chart of a wind farm group frequency coordination control method provided by an embodiment of the present invention. Figure 1 As shown, the wind farm group frequency coordination control method provided by the embodiment of the present invention includes:

[0062] Step S1: clustering each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm to obtain each unit group.

[0063] Step S2: according to the maximum frequency regulation potential timing curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated.

[0064] Step S3: Taking the active power adjustment amount of each unit group as the unit group frequency coordination control target, and performing frequency control on each unit in the unit group according to the preset unit frequency regulation strategy in the unit group.

[0065] In the above step S1, the device clusters each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group. The device can be a computer device that executes the method. Obtaining each primary frequency regulation potential index includes:

[0066] Calculate the average time from the preset time to the end of a frequency regulation corresponding to each unit power; taking unit i as an example, the calculation of the average time T corresponding to unit i requires the use of the historical data of unit i. The preset time t can be understood as a custom time in the historical data of unit i, such as 9 am every day. The end time of each frequency regulation of unit i is recorded as tix. Take multiple groups of tix as samples, and take the average of the differences between multiple groups of tix and t as the average time T corresponding to unit i.

[0067] Obtain the maximum predicted output value of each unit in the period corresponding to the preset time and each average time; the maximum predicted output value is recorded as Specifically, it is the maximum predicted output value that the i-th unit can achieve under the meteorological conditions at time t+T. The corresponding time is t+T. The uncertainty of wind power output is taken into account.

[0068] The difference between each maximum predicted output value and the actual output value of each unit is taken as the maximum frequency regulation potential time series curve. The actual output value of each unit is recorded as P i,t , specifically, the actual output value of the i-th unit at the preset time t.

[0069] Maximum frequency modulation potential timing curve I i,t It can be expressed by the following formula:

[0070]

[0071] Based on this indicator, the primary frequency regulation potential sequence value of Y units in the wind farm in one day can be obtained, with a time length of 24 hours. The above primary frequency regulation potential sequence value can reflect the change according to the preset time t.

[0072] The maximum frequency regulation potential timing curve corresponds to each unit one by one. The horizontal axis represents the time between 0 and 24 o'clock in a day, and the vertical axis represents the value of the maximum frequency regulation potential timing curve.

[0073] The maximum frequency regulation potential time series curve is the theoretical maximum adjustable output value of the wind turbine when participating in the system frequency regulation. It reflects the adjustable margin of the maximum output value of the wind turbine under the current output state until the end of the frequency regulation. The larger the value of the maximum frequency regulation potential time series curve, the more sufficient the frequency regulation potential of the wind farm at the current moment.

[0074] Considering the correlation of the maximum frequency regulation potential time series curve, the units in the wind farm are clustered and divided into different frequency regulation potential types, which facilitates the issuance of frequency regulation strategies and effectively reduces the amount of calculation and complexity.

[0075] The aggregate approximation method is used to reduce the dimension of the obtained maximum frequency modulation potential time series curve, and the similarity measurement is carried out based on distance and morphological features.

[0076] The clustering of each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm includes:

[0077] Determine a frequency modulation potential similarity measurement function according to a first similarity calculation index corresponding to distance similarity and a second similarity calculation index corresponding to direction similarity; the distance similarity is the distance similarity between wind speed curves associated with the maximum frequency modulation potential time series curve; the direction similarity is the direction similarity between wind speed curves associated with the maximum frequency modulation potential time series curve;

[0078] Each unit is clustered according to the frequency modulation potential similarity measurement function.

[0079] The first similarity calculation index is Euclidean distance, and the second similarity calculation index is cosine similarity.

[0080] The distance-based similarity is described as follows:

[0081] There are N wind speed sets W(w1,w2,...,w N ), each element w i represents a wind speed curve with a length of L, then the two wind speed curves w i and w j The Euclidean distance between It can be defined as:

[0082]

[0083] Among them, z represents the calculation step length of the wind speed curve, which can be set independently according to the actual situation, and w i,z represents any wind speed curve corresponding to the calculation step length of the wind speed curve, w j,z It also represents any wind speed curve corresponding to the wind speed curve length calculation step.

[0084] The smaller it is, the smaller it is, indicating that the two samples (w i ,w j ) is closer, Focus on the numerical differences between response samples.

[0085] The similarity based on direction is described as follows:

[0086] The cosine similarity is used to measure the waveform similarity of the wind speed curve. i and w j The cosine similarity between It can be defined as:

[0087]

[0088] For specific content, please refer to the above instructions.

[0089] The value range of is [-1,1]. The closer the value is to 1, the higher the degree of directional consistency between samples.

[0090] From the above analysis, we can see that the Euclidean distance focuses on the spatial proximity of the FM potential time series curve, and the cosine similarity focuses on the directional similarity of the FM potential time series curve. Therefore, taking into account the distance and direction of the samples, a FM potential similarity measurement function is proposed, as shown below:

[0091]

[0092] Where a1 and a2 are weight coefficients of the FM potential similarity measurement function, and their sum is 1.

[0093] like Figure 2 As shown in the figure, based on the proposed frequency regulation potential similarity measurement function, multiple units are clustered and divided, and the frequency regulation potential time series curves with close distance and consistent direction are clustered to realize unit group division. The cluster center is the maximum frequency regulation potential time series curve of the typical unit in the unit group k at time t.

[0094] In the above step S2, the device calculates the active power adjustment amount of the group corresponding to each group according to the maximum frequency regulation potential timing curves in each group, the number of wind turbines in each group and the primary frequency regulation active power adjustment amount of the wind farm. Referring to the above description, the maximum frequency regulation potential timing curve corresponding to group k is recorded as The number of fans in the unit group corresponding to the unit group k is recorded as M k , the wind farm primary frequency regulation active power regulation is recorded as ΔP t , ΔP t It can be calculated according to the following formula:

[0095]

[0096] ΔP t Indicates the active power regulation of the primary frequency regulation of the wind farm caused by frequency deviation, K f represents the active frequency regulation coefficient of the wind farm system, Δf represents the system frequency deviation, and f N Indicates the rated frequency of the system, usually 50Hz, P t is the active output value of the wind farm at the preset time t.

[0097] The active power regulation amount of the unit group corresponding to each unit group is calculated based on the maximum frequency regulation potential timing curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, including:

[0098] According to the maximum frequency regulation potential timing curves in each unit group and the number of fans in each unit group, the unit group allocation factors corresponding to each unit group are calculated; the unit group allocation factor D corresponding to unit group k can be calculated according to the following expression k,t :

[0099]

[0100] M represents the total number of units. In order to meet the frequency regulation demand of the system at the preset time t, it is necessary to mobilize each unit in the wind farm to perform a frequency regulation. The frequency regulation capabilities of each unit at different times are different. Wind turbines with similar frequency regulation capabilities are clustered into unit groups, and then different primary frequency regulation strategies are formulated for each unit group. In order to fully mobilize the frequency regulation capability of the unit group, the weight factor method is used to allocate the frequency regulation power. A weight factor is set for each unit group. The unit group allocation factor can be calculated based on the weight factor and the number of wind turbines in the unit group.

[0101] According to the allocation factor of each generator group and the active power regulation of the primary frequency regulation of the wind farm, the active power regulation of each generator group is calculated. The active power regulation of each generator group ΔP can be calculated according to the following expression: k,t :

[0102] ΔP k,t =D k,t ΔP t

[0103] In the above step S3, the device uses the active power adjustment amount of each unit group as the unit group frequency coordination control target, and performs frequency control on each unit in the unit group according to the preset unit frequency regulation strategy within the unit group. The active power adjustment amount of each unit group is used as the unit group frequency coordination control target, and the frequency control of each unit in the unit group is performed according to the preset unit frequency regulation strategy within the unit group, including:

[0104] Sorting the units in each unit group in descending order of response speed or power ramp speed to obtain a first sorting sequence or a second sorting sequence;

[0105] Select the front part of the units from the first sorting sequence or the second sorting sequence, and perform frequency modulation control on the part of the units; the sum of the active power adjustment amounts of the part of the units meets the frequency coordination control target of the unit group.

[0106] That is, the principle of selecting the front part of the units is to select the sum of the active regulation capacity of the units to meet the frequency coordination control target of the group, and then adjust the multiple units.

[0107] like Figure 3 As shown, the wind farm group frequency coordination control method provided by the embodiment of the present invention can be implemented by means of a hierarchical control architecture, as described below:

[0108] The hierarchical control architecture includes the station control layer, the clustering layer and the wind turbine frequency regulation layer, which are described as follows:

[0109] The functions of the station control layer include: 1) analyzing the historical data of each unit and calculating the maximum frequency regulation potential timing curve of each unit; 2) collecting the real-time wind speed conditions and real-time operating status of each unit monitored, formulating a frequency regulation strategy, and sending it to the fleet clustering layer.

[0110] The functions of the cluster clustering layer include: 1) clustering based on the maximum frequency regulation potential timing curve of each unit, and aggregating into multiple groups of clusters according to the similarity of frequency regulation capabilities; 2) receiving a frequency regulation strategy and assigning it to each cluster.

[0111] The functions of the wind turbine frequency regulation layer include: 1) increasing active power according to the primary frequency regulation strategy issued; 2) monitoring the real-time wind speed and operating status of each wind turbine.

[0112] The wind farm group frequency coordination control method provided by the embodiment of the present invention clusters each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm to obtain each unit group; according to each maximum frequency regulation potential timing curve in each unit group, the number of wind turbines in each unit group and the wind farm primary frequency regulation active power adjustment amount, the unit group active power adjustment amount corresponding to each unit group is calculated; the active power adjustment amount of each unit group is used as the unit group frequency coordination control target, and the frequency regulation strategy of the unit in the preset unit group is used to control the frequency of each unit in the unit group, which can effectively improve the adaptability and effectiveness of wind farm frequency control.

[0113] Furthermore, clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm includes:

[0114] According to a first similarity calculation index corresponding to the distance similarity and a second similarity calculation index corresponding to the direction similarity, a frequency modulation potential similarity measurement function is determined; the distance similarity is the distance similarity between the wind speed curves related to the maximum frequency modulation potential timing curve; the direction similarity is the direction similarity between the wind speed curves related to the maximum frequency modulation potential timing curve; the above-mentioned embodiment can be referred to for description and will not be repeated here.

[0115] Clustering of each unit is performed according to the frequency modulation potential similarity measurement function. The above-mentioned embodiment can be referred to for explanation and will not be described in detail.

[0116] Further, the first similarity calculation index is Euclidean distance, and the second similarity calculation index is cosine similarity. The above description can be referred to in the above embodiment, which will not be repeated here.

[0117] Furthermore, the active power regulation amount of the unit group corresponding to each unit group is calculated based on the maximum frequency regulation potential timing curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, including:

[0118] According to each maximum frequency regulation potential timing curve in each unit group and the number of fans in each unit group, the unit group allocation factor corresponding to each unit group is calculated; the above-mentioned embodiment can be referred to for description and will not be repeated here.

[0119] According to the allocation factor of each generator group and the primary frequency regulation active power regulation amount of the wind farm, the active power regulation amount of each generator group is calculated. The above-mentioned embodiment can be referred to for explanation and will not be described in detail.

[0120] Furthermore, the active power adjustment amount of each unit group is used as the unit group frequency coordination control target, and the frequency regulation control of each unit in the unit group is performed according to the preset unit frequency regulation strategy in the unit group, including:

[0121] The units in each unit group are sorted in descending order of response speed or power ramp speed to obtain a first sorting sequence or a second sorting sequence; the description may refer to the above embodiment and will not be repeated here.

[0122] Select the first part of the units from the first sorting sequence or the second sorting sequence, and perform frequency modulation control on the part of the units; the sum of the active power adjustment amounts of the part of the units meets the frequency coordination control target of the unit group. The above embodiments can be referred to for explanation and will not be repeated here.

[0123] Furthermore, each maximum frequency modulation potential timing curve is obtained, including:

[0124] Calculate the average time from the preset time to the end of a frequency modulation of the unit power corresponding to each unit; refer to the above embodiment for description and no further details will be given.

[0125] The maximum predicted output value of each unit in the period corresponding to the preset time and each average time is obtained; the above-mentioned embodiment can be referred to for description and will not be repeated here.

[0126] The difference between each maximum predicted output value and the actual output value of each unit corresponding to each unit is used as each maximum frequency regulation potential time series curve. The above embodiment can be referred to for explanation and will not be repeated here.

[0127] Figure 4 FIG. 1 is a schematic diagram of a wind farm group frequency coordination control device provided by an embodiment of the present invention. Figure 4 As shown, the wind farm group frequency coordination control device provided by the embodiment of the present invention includes a clustering unit 401, a calculation unit 402 and a control unit 403, wherein:

[0128] The clustering unit 401 is used to cluster each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm, so as to obtain each unit group; the calculation unit 402 is used to calculate the active power regulation amount of the unit group corresponding to each unit group according to the maximum frequency regulation potential timing curve in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm; the control unit 403 is used to use the active power regulation amount of each unit group as the unit group frequency coordination control target, and perform frequency control on each unit in the unit group according to the preset unit frequency regulation strategy within the unit group.

[0129] Specifically, the clustering unit 401 in the device is used to cluster each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm, so as to obtain each unit group; the calculation unit 402 is used to calculate the active power regulation amount of the unit group corresponding to each unit group according to the maximum frequency regulation potential timing curve in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm; the control unit 403 is used to use the active power regulation amount of each unit group as the unit group frequency coordination control target, and perform frequency control on each unit in the unit group according to the preset unit frequency regulation strategy within the unit group.

[0130] The wind farm group frequency coordination control device provided by the embodiment of the present invention clusters each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm to obtain each unit group; according to the maximum frequency regulation potential timing curve in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power adjustment amount of the wind farm, the unit group active power adjustment amount corresponding to each unit group is calculated; the active power adjustment amount of each unit group is used as the unit group frequency coordination control target, and the frequency regulation strategy of the unit in the preset unit group is used to control the frequency of each unit in the unit group, which can effectively improve the adaptability and effectiveness of wind farm frequency control.

[0131] Furthermore, the clustering unit 401 is specifically used for:

[0132] Determine a frequency modulation potential similarity measurement function according to a first similarity calculation index corresponding to distance similarity and a second similarity calculation index corresponding to direction similarity; the distance similarity is the distance similarity between wind speed curves associated with the maximum frequency modulation potential time series curve; the direction similarity is the direction similarity between wind speed curves associated with the maximum frequency modulation potential time series curve;

[0133] Each unit is clustered according to the frequency modulation potential similarity measurement function.

[0134] Furthermore, the first similarity calculation index is Euclidean distance, and the second similarity calculation index is cosine similarity.

[0135] Furthermore, the calculation unit 402 is specifically used for:

[0136] According to the maximum frequency regulation potential time series curves in each unit group and the number of fans in each unit group, the unit group allocation factors corresponding to each unit group are calculated;

[0137] The active power regulation amount of each generator group is calculated according to the allocation factor of each generator group and the primary frequency regulation active power regulation amount of the wind farm.

[0138] Furthermore, the control unit 403 is specifically configured to:

[0139] Sorting the units in each unit group in descending order of response speed or power ramp speed to obtain a first sorting sequence or a second sorting sequence;

[0140] Select the front part of the units from the first sorting sequence or the second sorting sequence, and perform frequency modulation control on the part of the units; the sum of the active power adjustment amounts of the part of the units meets the frequency coordination control target of the unit group.

[0141] Furthermore, the wind farm group frequency coordination control device is also used for:

[0142] Calculate the average time from the preset time to the end of a frequency regulation for the power of each unit corresponding to each unit;

[0143] Obtain the maximum predicted output value of each unit in the period corresponding to the preset time and each average time;

[0144] The difference between each maximum predicted output value and the actual output value of each unit corresponding to each unit is used as the maximum frequency regulation potential timing curve.

[0145] The embodiment of the present invention provides an embodiment of a wind farm group frequency coordination control device which can be specifically used to execute the processing flow of the above-mentioned method embodiments. Its functions are not described in detail here, and reference can be made to the detailed description of the above-mentioned method embodiments.

[0146] Figure 5 A schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention, such as Figure 5 As shown, the electronic device includes: a processor (processor) 501, a memory (memory) 502 and a bus 503;

[0147] The processor 501 and the memory 502 communicate with each other via a bus 503;

[0148] The processor 501 is used to call the program instructions in the memory 502 to execute the methods provided by the above method embodiments, for example, including:

[0149] Clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group;

[0150] According to the maximum frequency regulation potential time series curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated;

[0151] The active power adjustment amount of each unit group is used as the frequency coordination control target of the unit group, and the frequency of each unit in the unit group is controlled according to the preset unit frequency regulation strategy within the unit group.

[0152] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can perform the methods provided by the above method embodiments, for example, including:

[0153] Clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group;

[0154] According to the maximum frequency regulation potential time series curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated;

[0155] The active power adjustment amount of each unit group is used as the frequency coordination control target of the unit group, and the frequency of each unit in the unit group is controlled according to the preset unit frequency regulation strategy within the unit group.

[0156] This embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program enables the computer to execute the methods provided by the above method embodiments, for example, including:

[0157] Clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group;

[0158] According to the maximum frequency regulation potential time series curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated;

[0159] The active power adjustment amount of each unit group is used as the frequency coordination control target of the unit group, and the frequency of each unit in the unit group is controlled according to the preset unit frequency regulation strategy within the unit group.

[0160] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0161] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0162] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0163] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0164] In the description of this specification, the description with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0165] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific 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 in the scope of protection of the present invention.

Claims

1. A wind farm group frequency coordination control method, characterized in that: include: Clustering each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group; According to the maximum frequency regulation potential time series curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, the unit group active power regulation amount corresponding to each unit group is calculated; The active power adjustment amount of each unit group is used as the frequency coordination control target of the unit group, and the frequency of each unit in the unit group is controlled according to the preset unit frequency regulation strategy within the unit group.

2. The wind farm group frequency coordination control method according to claim 1, characterized in that: The clustering of each unit according to the maximum frequency regulation potential timing curve corresponding to each unit in the wind farm includes: Determine a frequency modulation potential similarity measurement function according to a first similarity calculation index corresponding to distance similarity and a second similarity calculation index corresponding to direction similarity; the distance similarity is the distance similarity between wind speed curves associated with the maximum frequency modulation potential time series curve; the direction similarity is the direction similarity between wind speed curves associated with the maximum frequency modulation potential time series curve; Each unit is clustered according to the frequency modulation potential similarity measurement function.

3. The wind farm group frequency coordination control method according to claim 2 is characterized in that: The first similarity calculation index is Euclidean distance, and the second similarity calculation index is cosine similarity.

4. The wind farm group frequency coordination control method according to claim 1, characterized in that: The active power regulation amount of the unit group corresponding to each unit group is calculated based on the maximum frequency regulation potential timing curves in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm, including: According to the maximum frequency regulation potential time series curves in each unit group and the number of fans in each unit group, the unit group allocation factors corresponding to each unit group are calculated; The active power regulation amount of each generator group is calculated according to the allocation factor of each generator group and the primary frequency regulation active power regulation amount of the wind farm.

5. The wind farm group frequency coordination control method according to claim 1, characterized in that: The active power adjustment amount of each unit group is used as the unit group frequency coordination control target, and the frequency regulation of each unit in the unit group is controlled according to the preset unit frequency regulation strategy in the unit group, including: Sorting the units in each unit group in descending order of response speed or power ramp speed to obtain a first sorting sequence or a second sorting sequence; Select the front part of the units from the first sorting sequence or the second sorting sequence, and perform frequency modulation control on the part of the units; the sum of the active power adjustment amounts of the part of the units meets the frequency coordination control target of the unit group.

6. The wind farm group frequency coordination control method according to any one of claims 1 to 5, characterized in that: Get the timing curves of each maximum frequency modulation potential, including: Calculate the average time from the preset time to the end of a frequency regulation for the power of each unit corresponding to each unit; Obtain the maximum predicted output value of each unit in the period corresponding to the preset time and each average time; The difference between each maximum predicted output value and the actual output value of each unit corresponding to each unit is used as the maximum frequency regulation potential timing curve.

7. A wind farm group frequency coordination control device, characterized in that: include: A clustering unit is used to cluster each unit according to the maximum frequency regulation potential time series curve corresponding to each unit in the wind farm to obtain each unit group; A calculation unit, for calculating the active power regulation amount of each unit group corresponding to each unit group according to each maximum frequency regulation potential timing curve in each unit group, the number of wind turbines in each unit group and the primary frequency regulation active power regulation amount of the wind farm; The control unit is used to use the active power adjustment amount of each unit group as the unit group frequency coordination control target, and to perform frequency regulation control on each unit in the unit group according to the preset unit frequency regulation strategy in the unit group.

8. The wind farm group frequency coordination control device according to claim 7, characterized in that: The clustering unit is specifically used for: Determine a frequency modulation potential similarity measurement function according to a first similarity calculation index corresponding to distance similarity and a second similarity calculation index corresponding to direction similarity; the distance similarity is the distance similarity between wind speed curves associated with the maximum frequency modulation potential time series curve; The directional similarity is the directional similarity between wind speed curves related to the maximum frequency modulation potential time series curve; Each unit is clustered according to the frequency modulation potential similarity measurement function.

9. The wind farm group frequency coordination control device according to claim 8, characterized in that: The first similarity calculation index is Euclidean distance, and the second similarity calculation index is cosine similarity.

10. The wind farm group frequency coordination control device according to claim 7, characterized in that: The computing unit is specifically used for: According to the maximum frequency regulation potential time series curves in each unit group and the number of fans in each unit group, the unit group allocation factors corresponding to each unit group are calculated; The active power regulation amount of each generator group is calculated according to the allocation factor of each generator group and the primary frequency regulation active power regulation amount of the wind farm.

11. The wind farm group frequency coordination control device according to claim 7, characterized in that: The control unit is specifically used for: Sorting the units in each unit group in descending order of response speed or power ramp speed to obtain a first sorting sequence or a second sorting sequence; Select the front part of the units from the first sorting sequence or the second sorting sequence, and perform frequency modulation control on the part of the units; the sum of the active power adjustment amounts of the part of the units meets the frequency coordination control target of the unit group.

12. The wind farm group frequency coordination control device according to any one of claims 7 to 11, characterized in that: The wind farm group frequency coordination control device is also used for: Calculate the average time from the preset time to the end of a frequency regulation for the power of each unit corresponding to each unit; Obtain the maximum predicted output value of each unit in the period corresponding to the preset time and each average time; The difference between each maximum predicted output value and the actual output value of each unit corresponding to each unit is used as the maximum frequency regulation potential timing curve.

13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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