Method, device, equipment and storage medium for establishing equivalent model of new energy station
By injecting micro-disturbance current at the grid connection point of the new energy station, measuring the port voltage phase angle change and calculating the equivalent capacity and topology structure in groups, an equivalent model is generated. This solves the problem of insufficient comprehensiveness and accuracy in the equivalent modeling of new energy stations in the existing technology, and achieves higher modeling accuracy and comprehensiveness.
Patent Information
- Application Number
- CN202210589225.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-05-27
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2042-05-27
AI Technical Summary
The existing equivalent modeling methods for new energy stations are not comprehensive enough and have low accuracy, and cannot accurately reflect the actual situation of new energy stations.
A micro-disturbance current is injected into the grid connection point of the new energy station, and the phase angle change of the port voltage of each new energy device is measured with the grid connection point as the phase reference point. The devices are sorted and grouped according to the phase angle change, and the equivalent capacity and topological structure are calculated to generate an equivalent model.
The comprehensiveness and accuracy of equivalent modeling of new energy stations have been improved, and the actual situation of new energy stations can be reflected more accurately.
Smart Images
Figure CN114996929B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of power system modeling, and in particular to a method, device, equipment and storage medium for establishing an equivalent model of a new energy station. Background Art
[0002] With the construction of power systems with a high proportion of renewable energy, the workload of mathematical modeling of power systems has increased rapidly. Unlike traditional synchronous generators with large capacities, the capacity of new energy equipment is very small. They usually need to be clustered to generate electricity for new energy stations. Therefore, the number of power generation equipment in the power system has increased dramatically. At the same time, compared with a single synchronous generator and a single new energy device (such as a wind turbine or photovoltaic power generation unit), the mathematical model of the latter has a high order, strong nonlinearity and contains a large number of switching control structures, which also makes the modeling of a single new energy device very complicated. Therefore, the equivalent reduced-order modeling of new energy stations is particularly urgent.
[0003] At present, there are mainly the following methods for equivalent modeling of new energy stations:
[0004] Single-machine multiplication method is a simple site equivalence method. This method selects a new energy device in the site and multiplies its capacity so that its capacity is equal to the capacity of the entire new energy site.
[0005] The feeder equivalence method equates the new energy equipment connected to the same feeder in the station to one unit, which to a certain extent reflects the topological structure of the station.
[0006] Some research has also grouped and modeled renewable energy devices within renewable energy stations based on their output levels. For example, in wind farms, wind turbines are grouped according to wind speed. Another common approach is to group renewable energy devices within a station based on their control structures, grouping devices with the same control structure into a single group for equivalent modeling.
[0007] However, existing equivalent modeling methods for renewable energy stations all have certain adaptability limitations. The single-machine multiplication method is relatively simplistic, ignoring the differences between equipment from different manufacturers and models. The feeder equivalent method, while more detailed than the single-machine multiplication model, only roughly considers the network topology including the feeders. In reality, the dynamic characteristics of renewable energy equipment on the same feeder are not exactly the same. Grouping equivalent modeling based on the output level or control structure of renewable energy equipment still only considers one-sided factors, and the equivalent effect cannot accurately assess the actual situation of renewable energy stations. Summary of the Invention
[0008] The present invention provides a method, device, equipment and storage medium for establishing a new energy station equivalent model, which is used to solve the technical problems that the existing new energy station equivalent modeling methods are not comprehensive enough and have low accuracy.
[0009] The present invention provides a method for establishing an equivalent model of a new energy station, wherein the new energy station has multiple new energy devices; the method comprises:
[0010] Injecting micro-disturbance current at the grid connection point of the preset new energy station;
[0011] Taking the grid connection point as a phase reference point, measuring the port voltage phase angle change of each of the new energy devices in the new energy station;
[0012] Arrange all the new energy devices according to the port voltage phase angle change to obtain a new energy device ranking;
[0013] Grouping all the new energy devices according to the preset grouping number and the order of the new energy devices to obtain new energy device groups;
[0014] Calculating equivalent capacities and equivalent topological structures of the new energy equipment groups;
[0015] Each of the new energy devices is grouped into an equivalent machine, and the equivalent capacity and equivalent topology of each equivalent machine are used in combination with the grid connection point to generate an equivalent model of the new energy station.
[0016] Optionally, the step of measuring the port voltage phase angle change of each of the new energy devices in the new energy station with the grid connection point as the phase reference point includes:
[0017] Taking the grid connection point as a phase reference point, measuring the steady-state value of the port phase angle of each of the new energy devices before the micro-disturbance current is injected into the grid connection point;
[0018] Taking the grid connection point as a phase reference point, measuring the steady-state value of the phase angle of the disturbance port of each of the new energy devices after the micro-disturbance current is injected into the grid connection point;
[0019] The difference between the disturbance port phase angle steady-state value and the port phase angle steady-state value is calculated to obtain the port voltage phase angle change of the new energy device.
[0020] Optionally, the step of arranging all the new energy devices according to the port voltage phase angle change to obtain a new energy device ranking includes:
[0021] The new energy devices are arranged in descending order according to the port voltage phase angle changes to obtain a new energy device ranking.
[0022] Optionally, the step of calculating the equivalent capacity and the equivalent topology of the new energy device group includes:
[0023] Determining a median value of the port voltage phase angle changes of all the new energy devices;
[0024] Obtaining the capacity of the new energy equipment corresponding to the median value;
[0025] Perform capacity multiplication modeling on the capacity of the new energy equipment corresponding to the median value to obtain the equivalent capacity of the new energy equipment group;
[0026] Obtaining a topological structure of the new energy equipment corresponding to the median value;
[0027] The topology structure is used to generate an equivalent topology structure of the new energy device grouping.
[0028] The present invention also provides a device for establishing an equivalent model of a new energy station, wherein the new energy station has multiple new energy devices; the device comprises:
[0029] A micro-perturbation current injection module is used to inject micro-perturbation current at the grid connection point of the preset new energy station;
[0030] A port voltage phase angle variation measurement module is used to measure the port voltage phase angle variation of each of the new energy devices in the new energy station with the grid connection point as the phase reference point;
[0031] a sorting module, configured to arrange all the new energy devices according to the port voltage phase angle change to obtain a new energy device sorting;
[0032] A grouping module, configured to group all the new energy devices according to a preset grouping number and the order of the new energy devices to obtain new energy device groups;
[0033] An equivalent capacity and equivalent topology calculation module, configured to calculate the equivalent capacity and equivalent topology of the new energy equipment group;
[0034] The equivalent model generation module is used to group each of the new energy equipment into an equivalent machine, use the equivalent capacity and equivalent topology of each equivalent machine, and combine the grid connection point to generate an equivalent model of the new energy station.
[0035] Optionally, the port voltage phase angle variation measurement module includes:
[0036] A port phase angle steady-state value measurement submodule is used to measure the port phase angle steady-state value of each of the new energy devices before the micro-disturbance current is injected into the grid connection point, using the grid connection point as a phase reference point;
[0037] A disturbance port phase angle steady-state value measurement submodule is used to measure the disturbance port phase angle steady-state value of each of the new energy devices after the micro-disturbance current is injected into the grid connection point, using the grid connection point as a phase reference point;
[0038] The port voltage phase angle variation calculation submodule is used to calculate the difference between the disturbance port phase angle steady-state value and the port phase angle steady-state value to obtain the port voltage phase angle variation of the new energy device.
[0039] Optionally, the sorting module includes:
[0040] The sorting submodule is used to sort the new energy devices in descending order according to the port voltage phase angle change to obtain a new energy device sorting.
[0041] Optionally, the equivalent capacity and equivalent topology calculation module includes:
[0042] A median value determination submodule, used to determine the median value of the port voltage phase angle changes of all the new energy devices;
[0043] A capacity acquisition submodule, configured to acquire the capacity of the new energy equipment corresponding to the median value;
[0044] an equivalent capacity determination submodule, configured to perform capacity multiplication modeling on the capacity of the new energy equipment corresponding to the median value to obtain the equivalent capacity of the new energy equipment group;
[0045] A topology structure acquisition submodule, configured to acquire a topology structure of the new energy equipment corresponding to the median value;
[0046] The equivalent topology structure acquisition submodule is used to generate an equivalent topology structure of the new energy equipment group using the topology structure.
[0047] The present invention further provides an electronic device, comprising a processor and a memory:
[0048] The memory is used to store program code and transmit the program code to the processor;
[0049] The processor is used to execute the method for establishing the new energy station equivalent model as described in any one of the above items according to the instructions in the program code.
[0050] The present invention also provides a computer-readable storage medium, which is used to store program code, and the program code is used to execute the method for establishing a new energy station equivalent model as described in any one of the above items.
[0051] It can be seen from the above technical solutions that the present invention has the following advantages: the present invention injects a micro-perturbation current at the grid connection point of a preset new energy station; takes the grid connection point as the phase reference point, measures the port voltage phase angle change of each new energy device in the new energy station; arranges all new energy devices according to the port voltage phase angle change to obtain a new energy device ranking; groups all new energy devices according to the preset grouping number and the new energy device ranking to obtain a new energy device group; calculates the equivalent capacity and equivalent topology of the new energy device group; takes each new energy device group as an equivalent machine, adopts the equivalent capacity and equivalent topology of each equivalent machine, and combines the grid connection point to generate an equivalent model of the new energy station. Thereby, the equivalent model of the new energy station can accurately reflect the new energy station. The comprehensiveness and accuracy of the equivalent modeling of the new energy station are improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0052] 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 description of the prior art. 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 paying any creative work.
[0053] Figure 1 A flowchart of a method for establishing a new energy station equivalent model according to an embodiment of the present invention;
[0054] Figure 2 A flowchart of a method for establishing a new energy station equivalent model according to another embodiment of the present invention;
[0055] Figure 3a This is a schematic diagram of a new energy station;
[0056] Figure 3b This is a schematic diagram of the equivalent model of the new energy station;
[0057] Figure 4 This is a structural block diagram of a device for establishing a new energy station equivalent model provided by an embodiment of the present invention. DETAILED DESCRIPTION
[0058] The embodiments of the present invention provide a method, device, equipment and storage medium for establishing a new energy station equivalent model, which are used to solve the technical problems that the existing new energy station equivalent modeling methods are not comprehensive enough and have low accuracy.
[0059] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0060] See also Figure 1 , Figure 1 A flowchart of the steps of a method for establishing a new energy station equivalent model provided by an embodiment of the present invention.
[0061] The present invention provides a method for establishing an equivalent model of a new energy station, wherein the new energy station has multiple new energy devices; the method may specifically include the following steps:
[0062] Step 101: injecting a micro-disturbance current into a grid connection point of a preset new energy station;
[0063] In the embodiment of the present invention, the new energy equipment may be a wind turbine or other equipment.
[0064] In the embodiment of the present invention, the micro-perturbation current needs to be as small as possible while causing observable changes in the phase angles of the various new energy devices, and does not cause stability problems for the entire model.
[0065] Step 102: Using the grid connection point as a phase reference point, measure the port voltage phase angle change of each new energy device in the new energy station;
[0066] In the embodiment of the present invention, the grid connection point may be used as a phase reference point to measure the port voltage phase angle change of each new energy device in the new energy station.
[0067] Step 103, arranging all new energy devices according to the change in the port voltage phase angle to obtain a new energy device ranking;
[0068] After obtaining the port voltage phase angle variation, the new energy devices may be sorted according to the magnitude of the port voltage phase angle variation to obtain a new energy device ranking.
[0069] Step 104: group all new energy devices according to the preset grouping number and the new energy device sorting to obtain new energy device groups;
[0070] After obtaining the ranking of the new energy devices, the new energy devices may be grouped according to a preset number of groups to obtain new energy device groups.
[0071] In a specific implementation, the number of groups can be set according to actual conditions, and the embodiment of the present invention does not specifically limit this. In an example, if the number of groups is 4, the new energy devices can be divided into 4 groups according to the order of the new energy devices.
[0072] Step 105, calculating the equivalent capacity and equivalent topology of the new energy equipment group;
[0073] In the embodiment of the present invention, after the new energy devices are grouped, the capacities and topological structures of the new energy devices in the new energy device group may be used to generate equivalent capacities and equivalent topological structures of the new energy device group.
[0074] In step 106, each new energy device is grouped into an equivalent machine, and the equivalent capacity and equivalent topology of each equivalent machine are used in combination with the grid connection point to generate an equivalent model of the new energy station.
[0075] After generating the equivalent capacity and equivalent topology structure of the new energy equipment grouping, the equivalent model of the new energy station can be generated in combination with the grid connection point.
[0076] The present invention injects a micro-perturbation current at the grid connection point of a preset new energy station; uses the grid connection point as a phase reference point to measure the port voltage phase angle change of each new energy device in the new energy station; arranges all new energy devices according to the port voltage phase angle change to obtain a new energy device ranking; groups all new energy devices according to a preset grouping number and a new energy device ranking to obtain a new energy device group; calculates the equivalent capacity and equivalent topology of the new energy device group; uses each new energy device group as an equivalent machine, adopts the equivalent capacity and equivalent topology of each equivalent machine, and combines the grid connection point to generate an equivalent model of the new energy station. This enables the new energy station equivalent model to accurately reflect the new energy station, improving the comprehensiveness and accuracy of the new energy station equivalent modeling.
[0077] See also Figure 2 , Figure 2 This is a flowchart of a method for establishing a new energy station equivalent model according to another embodiment of the present invention. Specifically, the method may include the following steps:
[0078] Step 201: injecting a micro-perturbation current into a grid connection point of a preset new energy station;
[0079] Step 202: Using the grid connection point as a phase reference point, measure the steady-state phase angle value of the port of each new energy device before the micro-disturbance current is injected into the grid connection point;
[0080] Step 203, taking the grid connection point as the phase reference point, measuring the steady-state value of the phase angle of the disturbance port of each new energy device after the micro-disturbance current is injected into the grid connection point;
[0081] Step 204, calculating the difference between the disturbance port phase angle steady-state value and the port phase angle steady-state value to obtain the port voltage phase angle change of the new energy device;
[0082] In the embodiment of the present invention, the grid connection point may be used as a phase reference point to measure the port voltage phase angle change of each new energy device in the new energy station.
[0083] In specific implementation, the port voltage phase angle change Δδ of each new energy device can be calculated by the following formula: i (i=1, 2, ..., n, where n is the number of new energy devices):
[0084] Δδ i =δ i1 -δ i0
[0085] Among them, δ i0 is the steady-state value of the port phase angle of the i-th new energy device before injecting the micro-disturbance current at the grid connection point; δ i1 is the steady-state value of the disturbance port phase angle of the i-th new energy device after the micro-disturbance current is injected into the grid-connected point.
[0086] Step 205: Arrange all new energy devices according to the change in the port voltage phase angle to obtain a ranking of the new energy devices;
[0087] In an example, step 205 may be: arranging the new energy devices in descending order according to the amount of change in the port voltage phase angle to obtain a ranking of the new energy devices.
[0088] In a specific implementation, the port voltage phase angle changes of the new energy devices may be arranged in descending order, thereby obtaining a ranking of the new energy devices.
[0089] In another example, the port voltage phase angle changes of the new energy devices may be arranged in ascending order to obtain the ranking of the new energy devices.
[0090] Among them, new energy devices with the same port voltage phase angle change can have the same serial number.
[0091] Step 206: group all new energy devices according to the preset grouping number and the new energy device sorting to obtain new energy device groups;
[0092] After obtaining the ranking of the new energy devices, the new energy devices may be grouped according to a preset number of groups to obtain new energy device groups.
[0093] In a specific implementation, new energy devices with the same port voltage phase angle change can be regarded as one device, and the total number of adjusted new energy devices can be divided by the number of groups. If the total number of devices cannot be divided by the number of groups, the groups with similar port voltage phase angle changes can be expanded by several devices, so that the number of new energy devices in each new energy device group is roughly the same.
[0094] Step 207, calculating the equivalent capacity and equivalent topology of the new energy equipment group;
[0095] In this embodiment of the present invention, step 207 may include the following sub-steps:
[0096] S71, determining the median value of the port voltage phase angle change of all new energy devices;
[0097] S72, obtaining the capacity of the new energy equipment corresponding to the median value;
[0098] S73, performing capacity multiplication modeling on the capacity of the new energy equipment corresponding to the median value to obtain the equivalent capacity of the new energy equipment group;
[0099] S74, obtaining the topological structure of the new energy equipment corresponding to the median value;
[0100] S75, using the topology structure to generate an equivalent topology structure for the new energy device groups.
[0101] In this example, the capacity of the new energy device corresponding to the median value of the port voltage phase angle change in the new energy device group can be used for capacity multiplication modeling, so that the calculated equivalent capacity of the new energy device group is the same as the total capacity of all new energy devices in the new energy device group. In addition, the topology of the new energy device corresponding to the median value can also be used to generate the equivalent topology of the new energy device group.
[0102] In step 208, each new energy device is grouped into an equivalent machine, and the equivalent capacity and equivalent topology of each equivalent machine are used in combination with the grid connection point to generate an equivalent model of the new energy station.
[0103] After generating the equivalent capacity and equivalent topology structure of the new energy equipment grouping, the equivalent model of the new energy station can be generated in combination with the grid connection point.
[0104] The present invention injects a micro-perturbation current at the grid connection point of a preset new energy station; uses the grid connection point as a phase reference point to measure the port voltage phase angle change of each new energy device in the new energy station; arranges all new energy devices according to the port voltage phase angle change to obtain a new energy device ranking; groups all new energy devices according to a preset grouping number and a new energy device ranking to obtain a new energy device group; calculates the equivalent capacity and equivalent topology of the new energy device group; uses each new energy device group as an equivalent machine, adopts the equivalent capacity and equivalent topology of each equivalent machine, and combines the grid connection point to generate an equivalent model of the new energy station. This enables the new energy station equivalent model to accurately reflect the new energy station, improving the comprehensiveness and accuracy of the new energy station equivalent modeling.
[0105] For ease of understanding, the embodiments of the present invention are described below with reference to specific examples:
[0106] See also Figure 3a and Figure 3b , Figure 3a This is a schematic diagram of a new energy station. Figure 3b This is a schematic diagram of the equivalent model of the new energy station. Figure 3a and Figure 3b In the figure, A is the grid connection point, B1-B34 are new energy equipment, C is the measurement point of one of the new energy equipment, and D1-D4 are equivalent machines.
[0107] exist Figure 3a In the example, when a perturbation current is injected into A, the phase angle change of the port voltage of the new energy device can be measured at point C, and then grouped according to the phase angle change of the port voltage to obtain groups D1-D4. Taking D1-D4 as an equivalent machine, we can get the following: Figure 3b The equivalent model of the new energy station is shown.
[0108] See also Figure 4 , Figure 4 This is a structural block diagram of a device for establishing a new energy station equivalent model provided by an embodiment of the present invention.
[0109] An embodiment of the present invention provides a device for establishing an equivalent model of a new energy station, wherein the new energy station has multiple new energy devices; the device includes:
[0110] The micro-perturbation current injection module 401 is used to inject micro-perturbation current at the grid connection point of the preset new energy station;
[0111] The port voltage phase angle variation measurement module 402 is used to measure the port voltage phase angle variation of each new energy device in the new energy station with the grid connection point as the phase reference point;
[0112] A sorting module 403 is used to sort all new energy devices according to the change in the port voltage phase angle to obtain a new energy device ranking;
[0113] A grouping module 404 is configured to group all new energy devices according to a preset grouping number and the order of the new energy devices to obtain new energy device groups;
[0114] The equivalent capacity and equivalent topology calculation module 405 is used to calculate the equivalent capacity and equivalent topology of the new energy equipment group;
[0115] The equivalent model generation module 406 is used to group each new energy device into an equivalent machine, use the equivalent capacity and equivalent topology of each equivalent machine, and combine the grid connection point to generate an equivalent model of the new energy station.
[0116] In the embodiment of the present invention, the port voltage phase angle variation measurement module 402 includes:
[0117] The port phase angle steady-state value measurement submodule is used to measure the port phase angle steady-state value of each new energy device before the micro-disturbance current is injected into the grid connection point, using the grid connection point as the phase reference point;
[0118] The disturbance port phase angle steady-state value measurement submodule is used to measure the disturbance port phase angle steady-state value of each new energy device after the micro-disturbance current is injected into the grid connection point, using the grid connection point as the phase reference point;
[0119] The port voltage phase angle variation calculation submodule is used to calculate the difference between the disturbance port phase angle steady-state value and the port phase angle steady-state value to obtain the port voltage phase angle variation of the new energy equipment.
[0120] In this embodiment of the present invention, the sorting module 403 includes:
[0121] The sorting submodule is used to sort the new energy devices in descending order according to the change in the port voltage phase angle to obtain the new energy device ranking.
[0122] In the embodiment of the present invention, the equivalent capacity and equivalent topology calculation module 405 includes:
[0123] The median value determination submodule is used to determine the median value of the port voltage phase angle change of all new energy devices;
[0124] The capacity acquisition submodule is used to obtain the capacity of the new energy equipment corresponding to the median value;
[0125] The equivalent capacity determination submodule is used to perform capacity multiplication modeling on the capacity of the new energy equipment corresponding to the median value to obtain the equivalent capacity of the new energy equipment group;
[0126] A topology structure acquisition submodule is used to obtain the topology structure of the new energy equipment corresponding to the median value;
[0127] The equivalent topology structure acquisition submodule is used to generate an equivalent topology structure of the new energy equipment grouping using the topology structure.
[0128] An embodiment of the present invention further provides an electronic device, the device including a processor and a memory:
[0129] The memory is used to store program codes and transmit the program codes to the processor;
[0130] The processor is used to execute the method for establishing the new energy station equivalent model according to the instructions in the program code.
[0131] An embodiment of the present invention further provides a computer-readable storage medium, which is used to store program code, and the program code is used to execute the method for establishing a new energy station equivalent model according to an embodiment of the present invention.
[0132] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.
[0133] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0134] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, apparatus, or computer program products. Thus, embodiments of the present invention may take the form of a fully hardware embodiment, a fully software embodiment, or an embodiment combining software and hardware. Furthermore, embodiments of 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 magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0135] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the 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 the 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 terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0136] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.
[0137] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.
[0138] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.
[0139] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.
[0140] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for establishing a new energy station equivalent model, characterized in that: The new energy station has a plurality of new energy devices; the method includes: Injecting micro-disturbance current at the grid connection point of the preset new energy station; Taking the grid connection point as a phase reference point, measuring the port voltage phase angle change of each of the new energy devices in the new energy station; Arrange all the new energy devices according to the port voltage phase angle change to obtain a new energy device ranking; Grouping all the new energy devices according to the preset grouping number and the order of the new energy devices to obtain new energy device groups; Calculating equivalent capacities and equivalent topological structures of the new energy equipment groups; Each of the new energy devices is grouped into an equivalent machine, and an equivalent model of the new energy station is generated by using the equivalent capacity and equivalent topology of each equivalent machine in combination with the grid connection point; The step of calculating the equivalent capacity and the equivalent topology of the new energy equipment group includes: Determining a median value of the port voltage phase angle changes of all the new energy devices; Obtaining the capacity of the new energy equipment corresponding to the median value; Perform capacity multiplication modeling on the capacity of the new energy equipment corresponding to the median value to obtain the equivalent capacity of the new energy equipment group; Obtaining a topological structure of the new energy equipment corresponding to the median value; The topology structure is used to generate an equivalent topology structure of the new energy device grouping.
2. The method according to claim 1, characterized in that The step of measuring the port voltage phase angle change of each of the new energy devices in the new energy station using the grid connection point as a phase reference point includes: Taking the grid connection point as a phase reference point, measuring the steady-state value of the port phase angle of each of the new energy devices before the micro-disturbance current is injected into the grid connection point; Taking the grid connection point as a phase reference point, measuring the steady-state value of the phase angle of the disturbance port of each of the new energy devices after the micro-disturbance current is injected into the grid connection point; The difference between the disturbance port phase angle steady-state value and the port phase angle steady-state value is calculated to obtain the port voltage phase angle change of the new energy device.
3. The method according to claim 1, characterized in that The step of arranging all the new energy devices according to the port voltage phase angle change to obtain a new energy device ranking includes: The new energy devices are arranged in descending order according to the port voltage phase angle changes to obtain a new energy device ranking.
4. A device for establishing a new energy station equivalent model, characterized in that: The new energy station has multiple new energy devices; the device includes: A micro-perturbation current injection module is used to inject micro-perturbation current at the grid connection point of the preset new energy station; A port voltage phase angle variation measurement module is used to measure the port voltage phase angle variation of each of the new energy devices in the new energy station with the grid connection point as the phase reference point; a sorting module, configured to arrange all the new energy devices according to the port voltage phase angle change to obtain a new energy device sorting; A grouping module, configured to group all the new energy devices according to a preset grouping number and the order of the new energy devices to obtain new energy device groups; An equivalent capacity and equivalent topology calculation module, configured to calculate the equivalent capacity and equivalent topology of the new energy equipment group; An equivalent model generation module is used to group each of the new energy devices into an equivalent machine, use the equivalent capacity and equivalent topology of each equivalent machine, and combine the grid connection point to generate an equivalent model of the new energy station; The equivalent capacity and equivalent topology calculation module includes: A median value determination submodule, used to determine the median value of the port voltage phase angle changes of all the new energy devices; A capacity acquisition submodule, configured to acquire the capacity of the new energy equipment corresponding to the median value; an equivalent capacity determination submodule, configured to perform capacity multiplication modeling on the capacity of the new energy equipment corresponding to the median value to obtain the equivalent capacity of the new energy equipment group; A topology structure acquisition submodule, configured to acquire a topology structure of the new energy equipment corresponding to the median value; The equivalent topology structure acquisition submodule is used to generate an equivalent topology structure of the new energy equipment group using the topology structure.
5. The device according to claim 4, characterized in that The port voltage phase angle variation measurement module includes: A port phase angle steady-state value measurement submodule is used to measure the port phase angle steady-state value of each of the new energy devices before the micro-disturbance current is injected into the grid connection point, using the grid connection point as a phase reference point; A disturbance port phase angle steady-state value measurement submodule is used to measure the disturbance port phase angle steady-state value of each of the new energy devices after the micro-disturbance current is injected into the grid connection point, using the grid connection point as a phase reference point; The port voltage phase angle variation calculation submodule is used to calculate the difference between the disturbance port phase angle steady-state value and the port phase angle steady-state value to obtain the port voltage phase angle variation of the new energy device.
6. The device according to claim 4, characterized in that The sorting module includes: The sorting submodule is used to sort the new energy devices in descending order according to the port voltage phase angle change to obtain a new energy device sorting.
7. An electronic device, characterized in that: The device includes a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the method for establishing the new energy station equivalent model according to any one of claims 1 to 3 according to the instructions in the program code.
8. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store program code, and the program code is used to execute the method for establishing a new energy station equivalent model according to any one of claims 1 to 3.