A new energy station power collection line equivalent method and device and a storage medium

Abstract

The application discloses a new energy station power collection line equivalent method and device and a storage medium. The method comprises the following steps: through a first equivalent impedance formula set in advance, a dry-type line with a branch in a new energy station power collection line is equivalent to a first dry-type line, a structure in which a plurality of first dry-type lines and a second dry-type line are connected in parallel is formed, and the second dry-type line is a dry-type line in the new energy power collection line; through a second equivalent impedance formula set in advance, the plurality of first dry-type lines and the second dry-type line are equivalent to first single-machine structures respectively, and a radioactive line structure formed by a plurality of first single-machine structures is formed; and through a third equivalent impedance formula set in advance, the radioactive line is equivalent to a second single-machine structure, and the second single-machine structure is used for indicating an equivalent impedance of the new energy station power collection line.

Description

Technical Field

[0001] This invention relates to the field of power line equivalent technology, and more specifically, to a method, apparatus and storage medium for power line equivalent in new energy power plants. Background Technology

[0002] With the development of the domestic economy and the improvement of environmental awareness, the demand for electricity and the way electricity is supplied have been significantly affected. This has led to the rapid development of new energy sources, but it has also brought many challenges to the safety and stability of the power grid.

[0003] The low immunity of wind power, photovoltaic units, and distributed power sources, along with large-scale wind power grid connection, makes low-frequency oscillations, subsynchronous oscillations, and supersynchronous oscillations in the system more prominent and complex. Therefore, the need for simulation of electromagnetic and electromechanical transients in the control process of new energy sources is becoming increasingly prominent in high-proportion power electronic systems. Large-scale wind turbine units pose a significant computational burden for simulating electromagnetic transients at the microsecond to millisecond level. Therefore, when modeling wind power and photovoltaic power plants, a large number of units are usually aggregated into an equivalent plant model.

[0004] In the electromagnetic and electromechanical transient modeling of wind power and photovoltaic power plants, the equivalent value of the collector lines is an important step. The accuracy of parameter calculation directly affects the steady-state and transient simulation results of voltage and power. Moreover, the topology of the collector lines is related to natural conditions such as terrain and has no fixed rules. Therefore, the accuracy and convenience of the equivalent value of the collector lines are particularly important.

[0005] The usual method for loss equalization is to use an aggregation formula to equalize the fixed-structure dry-connected or radial-connected collector lines. However, the collector line topology of wind farms is not regularly connected in a dry or radial manner, so the turbines must be aggregated to the grid connection point one by one. Since there are dozens to hundreds of wind turbines in a wind farm, the equalization process for the collector lines is quite complicated. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an equivalent method, apparatus, and storage medium for power collection lines in new energy power plants.

[0007] According to one aspect of the present invention, an equivalent method for power collection lines in new energy power plants is provided, comprising:

[0008] By using the pre-set first equivalent impedance formula, the dry-type lines with branches in the new energy power station collection lines are equivalent to the first dry-type lines, forming a structure in which multiple first dry-type lines and second dry-type lines are connected in parallel, wherein the second dry-type lines are the dry-type lines in the new energy power collection lines.

[0009] By using a pre-set second equivalent impedance formula, multiple first dry lines and second dry lines are respectively converted into first single-unit structures, forming a radial line structure composed of multiple first single-unit structures.

[0010] By using a pre-set third equivalent impedance formula, the radial line is equivalent to the second single-unit structure, where the second single-unit structure is used to indicate the equivalent impedance of the power collection line of the new energy power station.

[0011] Optionally, the formula for the first equivalent impedance is as follows:

[0012]

[0013] Among them, Z eq For the equivalent impedance, P j P represents the active power of the j-th unit in the main line, m represents the total number of units in the main line, and P represents the active power of the j-th unit. ai Z represents the active power of the i-th generator unit in the branch circuit, n represents the total number of generator units in the branch circuit, and Z represents the active power of the i-th generator unit in the branch circuit. a1 To Z an The line impedance is used to connect the branch units a1 to an.

[0014] Alternatively, the formula for the second equivalent impedance is as follows:

[0015]

[0016] Among them, Z eq For the equivalent impedance, P i Let Z1 be the active power of the i-th unit, n be the total number of dry-type line units, and Z2 be the active power of the i-th unit. n The impedance of the lines connected to units 1 to n.

[0017] Alternatively, the formula for the third equivalent impedance is as follows:

[0018]

[0019] Among them, Z eq For the equivalent impedance, P i Z represents the active power of the i-th unit, n is the total number of mainline generating units, and Z represents the active power of the i-th unit. i Let be the line impedance connected to the i-th generator unit.

[0020] According to another aspect of the present invention, an equivalent device for the power collection lines of a new energy power station is provided, comprising:

[0021] The first equivalent module is used to convert the branch dry-type lines in the new energy power station collection line into first dry-type lines by using the pre-set first equivalent impedance formula, forming a structure in which multiple first dry-type lines and second dry-type lines are connected in parallel, wherein the second dry-type lines are the dry-type lines in the new energy power collection line.

[0022] The second equivalent module is used to convert multiple first dry lines and second dry lines into first single-unit structures by using a pre-set second equivalent impedance formula, thereby forming a radial line structure composed of multiple first single-unit structures.

[0023] The third equivalent module is used to convert the radial line into the second single-unit structure using a pre-set third equivalent impedance formula. The second single-unit structure is used to indicate the equivalent impedance of the power collection line of the new energy power station.

[0024] According to another aspect of the present invention, a computer-readable storage medium is provided, the storage medium storing a computer program for performing the methods described in any of the above aspects of the present invention.

[0025] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising: a processor; a memory for storing executable instructions of the processor; the processor being configured to read the executable instructions from the memory and execute the instructions to implement the method described in any of the preceding aspects of the present invention.

[0026] Therefore, this application proposes a rapid equivalent method for the collector lines of new energy power plants, based on the loss consistency method, using topology type as the basic structure. Collector lines in wind and solar power plants with arbitrarily complex topologies can be classified into three basic structures: dry-type, dry-type with branches, and radial-type. First, all dry-type structures with branches are converted to dry-type structures. Then, all dry-type structures are converted to radial structures. Finally, the radial structures are converted to the equivalent impedance of one or N user-required structures. This simplifies the tedious calculation of equivalent impedance for collector lines in the electromagnetic and electromechanical transient modeling of wind and solar power plants, and improves the simulation accuracy of voltage, active power, and reactive power at the grid connection point. Attached Figure Description

[0027] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0028] Figure 1 This is a flowchart illustrating the equivalent method for power collection lines in new energy power plants provided in an exemplary embodiment of the present invention;

[0029] Figures 2a-2e This is a schematic diagram illustrating the equivalent of a branch-type dry line to a dry line according to an exemplary embodiment of the present invention.

[0030] Figures 3a-3c This is a schematic diagram of a dry-type line equivalent to a single-unit structure provided by an exemplary embodiment of the present invention;

[0031] Figures 4a-4bThis is a schematic diagram of a radially connected topology structure formed by equivalent conversion of a dry topology structure into a single-machine structure, provided by an exemplary embodiment of the present invention.

[0032] Figures 5a-5b This is a schematic diagram of an exemplary embodiment of the present invention, which represents the radial topology in a collector line as an equivalent single-unit structure.

[0033] Figure 6 This is a schematic diagram of the structure of the equivalent device for the power collection line of a new energy power station provided in an exemplary embodiment of the present invention;

[0034] Figure 7 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. Detailed Implementation

[0035] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0036] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0037] Those skilled in the art will understand that the terms "first," "second," etc., in the embodiments of the present invention are only used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical order between them.

[0038] It should also be understood that in the embodiments of the present invention, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0039] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more unless explicitly defined or given contrary instructions in the context.

[0040] Furthermore, the term "and / or" in this invention is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this invention generally indicates that the preceding and following related objects have an "or" relationship.

[0041] It should also be understood that the description of the various embodiments in this invention emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0042] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0043] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0044] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0046] The embodiments of this invention can be applied to electronic devices such as terminal devices, computer systems, and servers, and can operate together with a wide range of other general-purpose or special-purpose computing system environments or configurations. Well-known examples of terminal devices, computing systems, environments, and / or configurations suitable for use with electronic devices such as terminal devices, computer systems, and servers include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputer systems, mainframe computer systems, and distributed cloud computing environments including any of the above systems, etc.

[0047] Electronic devices such as terminal devices, computer systems, and servers can be described in the general context of computer system executable instructions (such as program modules) executed by a computer system. Typically, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in distributed cloud computing environments, where tasks are executed by remote processing devices linked through communication networks. In distributed cloud computing environments, program modules can reside on local or remote computing system storage media, including storage devices.

[0048] Exemplary methods

[0049] Figure 1 This is a flowchart illustrating an exemplary embodiment of the present invention regarding the equivalent method for power collection lines in new energy power plants. This embodiment can be applied to electronic devices, such as... Figure 1 As shown, the equivalent method 100 for the collection lines of new energy power plants includes the following steps:

[0050] Step 101: Using the pre-set first equivalent impedance formula, the branch dry-type lines in the new energy power station collection lines are converted into first dry-type lines, forming a structure in which multiple first dry-type lines and second dry-type lines are connected in parallel, wherein the second dry-type lines are the dry-type lines in the new energy power collection lines.

[0051] Step 102: Using the pre-set second equivalent impedance formula, multiple first dry lines and second dry lines are respectively converted into first single-unit structures to form a radial line structure composed of multiple first single-unit structures.

[0052] Step 103: Using a pre-set third equivalent impedance formula, the radial line is equivalent to the second single-unit structure, where the second single-unit structure is used to indicate the equivalent impedance of the power collection line of the new energy power station.

[0053] There can be one or more second dry lines.

[0054] This application proposes a rapid equivalent method for the collector lines of new energy power plants, based on the loss consistency method, using topology type as the basic structure. Collector lines for wind and solar power plants with arbitrarily complex topologies can be classified into three basic structures: dry-type, dry-type with branches, and radial-type. First, all dry-type structures with branches are equivalent to dry-type structures. Then, all dry-type structures are equivalent to radial structures. Finally, the radial structures are equivalent to the equivalent impedance of one or N user-required structures.

[0055] Specifically as follows:

[0056] refer to Figures 2a-2c The diagram illustrates the equivalent process for a dry-type line with branches. First, the equivalent process is... Figure 2a The branch lines are sequentially converted to the branch line grid connection point A using the loss consistency method, such as... Figure 2b Then, the equivalent impedance of the branch is converted to an equivalent value. Figure 2c The dry-type connection shown is an equivalent unit. For any number of units with branches in a dry-type line, the equivalent impedance of the branches to the trunk is expressed by formula (1). Using formula (1), the topology of the wind farm collector line with branch structure is equivalent to a topology consisting of multiple dry-type structures connected in parallel. The equivalence process is as follows: Figures 2d to 2e As shown.

[0057]

[0058] Among them, Z eq For the equivalent impedance, P j P represents the active power of the j-th unit in the main line, m represents the total number of units in the main line, and P represents the active power of the j-th unit. ai Z represents the active power of the i-th generator unit in the branch circuit, n represents the total number of generator units in the branch circuit, and Z represents the active power of the i-th generator unit in the branch circuit. a1 To Z anThe line impedance is used to connect the branch units a1 to an.

[0059] Dry-connected wind turbines, such as Figure 3a As shown, the wind turbines are aggregated one by one from the end to the grid connection point using the loss-consistent equalization method, such as... Figure 3b and 3c As shown in the figure, assuming that the terminal voltages of the two wind turbines in the aggregation are equal, for any number of dry lines, n units are equivalent to 1 unit, and their equivalent impedance is calculated as shown in formula (3).

[0060]

[0061] Among them, Z eq For the equivalent impedance, P i Let Z1 be the active power of the i-th unit, n be the total number of dry-type line units, and Z2 be the active power of the i-th unit. n The impedance of the lines connected to units 1 to n.

[0062] Then, using formula (3), the dry topology in the wind farm collector line is equivalent to a single-unit structure, forming a radial connection topology. The equivalence process is as follows: Figures 4a to 4b As shown.

[0063] Radial collector line equivalent value as Figures 5a-5b As shown, the branches are equated to the grid connection point one by one according to the loss uniformity method. For a radial line with any number of units, n units are equated to 1 unit, and their impedance is equated as shown in formula (4). The radial topology in the collector line is equated to a single-unit structure using formula (4). If necessary, the single-unit structure can be equated to a radial topology with N units in parallel using formula (4). The equation process is as follows: Figures 5a to 5b As shown.

[0064]

[0065] Among them, Z eq For the equivalent impedance, P i Z represents the active power of the i-th unit, n is the total number of mainline generating units, and Z represents the active power of the i-th unit. i Let be the line impedance connected to the i-th generator unit.

[0066] The above method can perform equivalent calculations on any complex topology of the collector line, simplifying the tedious process of collector line equivalent calculations and making it easy to adapt to software. Using software to calculate can further reduce the computational burden of equivalent calculations.

[0067] Furthermore, by using this method to compile the above formulas into software, the computational workload of equivalent calculations can be further simplified and computational efficiency improved.

[0068] Therefore, this application proposes a rapid equivalent method for the collector lines of new energy power plants, based on the loss consistency method, using topology type as the basic structure. Collector lines in wind and solar power plants with arbitrarily complex topologies can be classified into three basic structures: dry-type, dry-type with branches, and radial-type. First, all dry-type structures with branches are converted to dry-type structures. Then, all dry-type structures are converted to radial structures. Finally, the radial structures are converted to the equivalent impedance of one or N user-required structures. This simplifies the tedious calculation of equivalent impedance for collector lines in the electromagnetic and electromechanical transient modeling of wind and solar power plants, and improves the simulation accuracy of voltage, active power, and reactive power at the grid connection point.

[0069] Exemplary device

[0070] Figure 6 This is a schematic diagram of the structure of an equivalent device for the power collection lines of a new energy power station provided in an exemplary embodiment of the present invention. Figure 6 As shown, the device 600 includes:

[0071] The first equivalent module 610 is used to convert the branch dry line in the new energy power station collection line into a first dry line by using a pre-set first equivalent impedance formula, forming a structure in which multiple first dry lines and second dry lines are connected in parallel, wherein the second dry line is a dry line in the new energy power collection line.

[0072] The second equivalent module 620 is used to convert multiple first dry lines and second dry lines into first single-unit structures respectively by using a pre-set second equivalent impedance formula, thereby forming a radial line structure composed of multiple first single-unit structures.

[0073] The third equivalent module 630 is used to convert the radial line into a second single-unit structure by using a pre-set third equivalent impedance formula, wherein the second single-unit structure is used to indicate the equivalent impedance of the collection line of the new energy power station.

[0074] Optionally, the formula for the first equivalent impedance is as follows:

[0075]

[0076] Among them, Z eq For the equivalent impedance, P j P represents the active power of the j-th unit in the main line, m represents the total number of units in the main line, and P represents the active power of the j-th unit. ai Z represents the active power of the i-th generator unit in the branch circuit, n represents the total number of generator units in the branch circuit, and Z represents the active power of the i-th generator unit in the branch circuit. a1 To Z an The line impedance is used to connect the branch units a1 to an.

[0077] Alternatively, the formula for the second equivalent impedance is as follows:

[0078]

[0079] Among them, Z eq For the equivalent impedance, P i Let Z1 be the active power of the i-th unit, n be the total number of dry-type line units, and Z2 be the active power of the i-th unit. n The impedance of the lines connected to units 1 to n.

[0080] Alternatively, the formula for the third equivalent impedance is as follows:

[0081]

[0082] Among them, Z eq For the equivalent impedance, P i Z represents the active power of the i-th unit, n is the total number of mainline generating units, and Z represents the active power of the i-th unit. i Let be the line impedance connected to the i-th generator unit.

[0083] Exemplary electronic devices

[0084] Figure 7 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. For example... Figure 7 As shown, the electronic device 70 includes one or more processors 71 and a memory 72.

[0085] The processor 71 may be a central processing unit (CPU) or other form of processing unit with data processing and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0086] The memory 72 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 71 may execute the program instructions to implement the methods of the software programs of the various embodiments of the present invention described above, and / or other desired functions. In one example, the electronic device may also include an input device 73 and an output device 74, these components being interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0087] In addition, the input device 73 may also include, for example, a keyboard, a mouse, etc.

[0088] The output device 74 can output various information to the outside. The output device 74 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0089] Of course, for the sake of simplicity, Figure 7 Only some of the components of the electronic device relevant to the present invention are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0090] Exemplary computer program products and computer-readable storage media

[0091] In addition to the methods and apparatus described above, embodiments of the present invention may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the methods according to various embodiments of the present invention described in the "Exemplary Methods" section above.

[0092] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of the present invention. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0093] Furthermore, embodiments of the present invention may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps of the methods for information mining of historical change records according to various embodiments of the present invention as described in the "Exemplary Methods" section above.

[0094] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0095] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0096] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0097] The block diagrams of devices, systems, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, systems, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0098] The methods and systems of the present invention may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of the present invention are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, the present invention may also be implemented as a program recorded on a recording medium, the program comprising machine-readable instructions for implementing the methods according to the present invention. Thus, the present invention also covers recording media storing programs for performing the methods according to the present invention.

[0099] It should also be noted that in the systems, apparatus, and methods of the present invention, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalents of the present invention. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the invention. Therefore, the invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0100] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. An equivalent method for power collection lines in new energy power plants, characterized in that, include: By using a pre-set first equivalent impedance formula, the dry-type lines with branches in the power collection lines of the new energy power station are equivalent to first dry-type lines, forming a structure in which multiple first dry-type lines and second dry-type lines are connected in parallel, wherein the second dry-type lines are the dry-type lines in the power collection lines of the new energy power station. By using a pre-set second equivalent impedance formula, multiple first dry lines and second dry lines are respectively converted into first single-unit structures to form a radial line structure composed of multiple first single-unit structures. The radial line structure is equivalent to a second single-unit structure by using a pre-set third equivalent impedance formula, wherein the second single-unit structure is used to indicate the equivalent impedance of the power collection line of the new energy power station. The formula for the first equivalent impedance is as follows: Among them, Z eq1 For the first equivalent impedance, P j P represents the active power of the j-th unit in the main line, m represents the total number of units in the main line, and P represents the active power of the j-th unit. ai Z represents the active power of the i-th generator unit in the branch circuit, n represents the total number of generator units in the branch circuit, and Z represents the active power of the i-th generator unit in the branch circuit. a1 To Z an The line impedance connected to branch units a1 to an; The formula for the second equivalent impedance is as follows: Among them, Z eq2 For the second equivalent impedance, P i Let Z1 be the active power of the i-th unit, k be the total number of dry-type line units, and Z2 be the active power of the i-th unit. k The impedance of the lines connected to units 1 through k; The formula for the third equivalent impedance is as follows: Among them, Z eq3 For the third equivalent impedance, P i Z represents the active power of the i-th unit, x represents the total number of mainline generating units, and Z represents the active power of the i-th unit. i Let be the line impedance connected to the i-th generator unit.

2. An equivalent device for the power collection lines of a new energy power station, used to implement the method described in claim 1, characterized in that, include: The first equivalent module is used to convert the branch dry-type line in the power collection line of the new energy power station into a first dry-type line by using a pre-set first equivalent impedance formula, forming a structure in which multiple first dry-type lines and second dry-type lines are connected in parallel, wherein the second dry-type line is a dry-type line in the power collection line of the new energy power station. The second equivalent module is used to convert multiple first dry lines and second dry lines into first single-unit structures by using a pre-set second equivalent impedance formula, thereby forming a radial line structure composed of multiple first single-unit structures. The third equivalent module is used to convert the radial line structure into a second single-unit structure by using a pre-set third equivalent impedance formula, wherein the second single-unit structure is used to indicate the equivalent impedance of the power collection line of the new energy power station.

3. A computer-readable storage medium, characterized in that, The storage medium stores a computer program for executing the method described in claim 1.

4. An electronic device, characterized in that, The electronic device includes: processor; Memory used to store the processor's executable instructions; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method of claim 1.

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