A comprehensive evaluation method of short-circuit current control scheme based on analytic hierarchy process

Abstract

The application discloses a kind of short-circuit current control scheme's comprehensive evaluation method based on analytic hierarchy process, comprising: for the short-circuit current of target power grid exceeds standard scene, based on analytic hierarchy process, the hierarchical structure model including target layer, criterion layer and scheme layer is constructed;Criterion layer includes a plurality of preset evaluation indexes based on short-circuit current exceeds standard scene, and scheme layer includes a plurality of short-circuit current control strategies to be evaluated;Based on the importance judgment of preset evaluation index by experts, the judgment matrix is constructed and calculated, and the weight of each preset evaluation index is determined;For each short-circuit current control strategy in scheme layer, the performance of it under preset evaluation index is quantified, and the index performance data set corresponding to each short-circuit current control strategy is obtained;Based on the weight of each preset evaluation index, the index performance data set corresponding to each short-circuit current control strategy is weighted and comprehensively calculated, the comprehensive score of each short-circuit current control strategy is obtained and is sorted accordingly, and the optimization decision result is output.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and more specifically, to a comprehensive evaluation method for short-circuit current control schemes based on the analytic hierarchy process (AHP). Background Technology

[0002] The continuous expansion and increasing complexity of the power grid have led to a growing problem of excessive short-circuit currents at some key sites, posing a significant challenge to the safe operation and further development of the power grid. To address excessive short-circuit currents, the power system has adopted various measures, such as adjusting operating modes, optimizing the grid structure, and installing current-limiting devices. However, while these measures suppress short-circuit currents, they also have varying degrees of impact on system power flow, stability, power supply reliability, and economic efficiency. Therefore, how to scientifically select the optimal control strategy for specific scenarios has become a critical issue that urgently needs to be addressed. It is necessary to establish a systematic, objective, and comprehensive evaluation method that coordinates multiple objectives, including safety, technology, and economy. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a comprehensive evaluation method for short-circuit current control schemes based on the analytic hierarchy process (AHP).

[0004] According to one aspect of the present invention, a comprehensive evaluation method for short-circuit current control schemes based on the analytic hierarchy process (AHP) is provided, comprising: For the scenario of excessive short-circuit current in the target power grid, a hierarchical model is constructed based on the analytic hierarchy process (AHP), which includes a target layer, a criterion layer, and a scheme layer. The criterion layer contains multiple preset evaluation indicators based on the scenario of excessive short-circuit current, and the scheme layer contains multiple short-circuit current control strategies to be evaluated. Based on the experts' judgment on the importance of the preset evaluation indicators, a judgment matrix is ​​constructed and calculated to determine the weight of each preset evaluation indicator. For each short-circuit current control strategy in the scheme layer, its performance under the preset evaluation index is quantified to obtain the index performance dataset corresponding to each short-circuit current control strategy. Based on the weights of each preset evaluation index, the performance datasets of each short-circuit current control strategy are weighted and comprehensively calculated to obtain the comprehensive score of each short-circuit current control strategy, which is then ranked accordingly, and the optimization decision results are output.

[0005] Optionally, the preset evaluation indicators include at least one or more combinations of system stability level, DC system operating environment, new energy operating environment, grid flexibility and adaptability, and economic indicators.

[0006] Optionally, the short-circuit current control strategy includes at least one of the following: power grid structure change strategy, equipment operating parameter adjustment strategy, and current limiting device installation strategy.

[0007] Optionally, based on experts' judgments on the importance of preset evaluation indicators, a judgment matrix is ​​constructed and calculated to determine the weight of each preset evaluation indicator, including: Obtain the importance values ​​assigned by experts based on the 1-9 scale method for the preset evaluation indicators; Based on importance assignment, a judgment matrix is ​​constructed for pairwise comparisons between indicators; The judgment matrix is ​​calculated and its consistency is checked to finally determine the weight vector.

[0008] Optionally, for each short-circuit current control strategy in the scheme layer, its performance under preset evaluation indicators is quantified to obtain a dataset of indicator performance corresponding to each short-circuit current control strategy, including: The implementation effect of short-circuit current control strategies is analyzed through simulation calculations or actual operation data to evaluate their impact on various preset evaluation indicators and obtain the performance dataset of each short-circuit current control strategy.

[0009] Optionally, based on the weights of each preset evaluation index, a weighted comprehensive calculation is performed on the performance datasets corresponding to each short-circuit current control strategy to obtain a comprehensive score for each short-circuit current control strategy, including: A weighted summation model is used to multiply the performance values ​​of each strategy under each evaluation indicator by the corresponding indicator weight and then sum them up to obtain a comprehensive score.

[0010] According to another aspect of the present invention, a comprehensive evaluation device for short-circuit current control schemes based on the analytic hierarchy process (AHP) is provided, comprising: The first construction module is used to construct a hierarchical model based on the analytic hierarchy process (AHP) for short-circuit current exceeding the target power grid. The model includes a target layer, a criterion layer, and a scheme layer. The criterion layer contains multiple preset evaluation indicators based on the short-circuit current exceeding the target scenario, and the scheme layer contains multiple short-circuit current control strategies to be evaluated. The second construction module is used to construct a judgment matrix and perform calculations based on experts' judgments on the importance of preset evaluation indicators, and to determine the weight of each preset evaluation indicator. The quantization module is used to quantify the performance of each short-circuit current control strategy in the scheme layer under preset evaluation indicators, and obtain the indicator performance dataset corresponding to each short-circuit current control strategy. The calculation module is used to perform weighted comprehensive calculation on the performance dataset of each short-circuit current control strategy based on the weight of each preset evaluation index, obtain the comprehensive score of each short-circuit current control strategy, sort it accordingly, and output the optimization decision result.

[0011] Optionally, the preset evaluation indicators include at least one or more combinations of system stability level, DC system operating environment, new energy operating environment, grid flexibility and adaptability, and economic indicators.

[0012] Optionally, the short-circuit current control strategy includes at least one of the following: power grid structure change strategy, equipment operating parameter adjustment strategy, and current limiting device installation strategy.

[0013] Optionally, the second building module includes: Obtain the importance values ​​assigned by experts based on the 1-9 scale method for the preset evaluation indicators; Based on importance assignment, a judgment matrix is ​​constructed for pairwise comparisons between indicators; The judgment matrix is ​​calculated and its consistency is checked to finally determine the weight vector.

[0014] Optionally, the quantization module includes: The implementation effect of short-circuit current control strategies is analyzed through simulation calculations or actual operation data to evaluate their impact on various preset evaluation indicators and obtain the performance dataset of each short-circuit current control strategy.

[0015] Optionally, the computing module includes: A weighted summation model is used to multiply the performance values ​​of each strategy under each evaluation indicator by the corresponding indicator weight and then sum them up to obtain a comprehensive score.

[0016] 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.

[0017] 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.

[0018] Therefore, this invention proposes a comprehensive evaluation method for short-circuit current control strategies based on the Analytic Hierarchy Process (AHP). By constructing a structured evaluation system, the complex decision-making problem is decomposed into multiple levels such as objectives, criteria, and schemes, quantifying the experience and judgment of planning and operation personnel. By systematically considering scenarios of excessive short-circuit current, the AHP is used to analyze and calculate the relative weights of each evaluation index, and different candidate strategies are comprehensively scored and ranked. This provides clear and reliable technical support for selecting the optimal short-circuit current control scheme in specific scenarios. Attached Figure Description

[0019] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures: Figure 1 This is a flowchart illustrating a comprehensive evaluation method for a short-circuit current control scheme based on the analytic hierarchy process (AHP) provided in an exemplary embodiment of the present invention. Figure 2 This is another flowchart illustrating the comprehensive evaluation method for short-circuit current control schemes based on the analytic hierarchy process provided in an exemplary embodiment of the present invention. Figure 3 This is a radar chart evaluating the performance of a short-circuit current control scheme provided by an exemplary embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of a comprehensive evaluation device for a short-circuit current control scheme based on the analytic hierarchy process provided in an exemplary embodiment of the present invention. Figure 5 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Exemplary methods Figure 1This is a flowchart illustrating a comprehensive evaluation method for short-circuit current control schemes based on the analytic hierarchy process (AHP) provided by an exemplary embodiment of the present invention. This embodiment can be applied to electronic devices, such as… Figure 1 As shown, the present invention provides a comprehensive evaluation method 100 for short-circuit current control schemes based on the analytic hierarchy process (AHP), comprising the following steps: Step 101: For the short-circuit current exceeding the standard scenario of the target power grid, construct a hierarchical structure model based on the analytic hierarchy process (AHP) that includes a target layer, a criterion layer, and a scheme layer. The criterion layer includes multiple preset evaluation indicators based on the short-circuit current exceeding the standard scenario, and the scheme layer includes multiple short-circuit current control strategies to be evaluated. Step 102: Based on the experts' judgment on the importance of the preset evaluation indicators, construct a judgment matrix and perform calculations to determine the weight of each preset evaluation indicator; Step 103: For each short-circuit current control strategy in the scheme layer, quantify its performance under the preset evaluation index to obtain the index performance dataset corresponding to each short-circuit current control strategy. Step 104: Based on the weights of each preset evaluation index, perform a weighted comprehensive calculation on the index performance dataset corresponding to each short-circuit current control strategy to obtain the comprehensive score of each short-circuit current control strategy and sort it accordingly, and output the optimization decision result.

[0034] Specifically, based on the needs in the background technology and closely combined with the actual stage of power grid development, the realistic constraints of operating conditions, and the specific characteristics of short-circuit current exceeding the standard, this invention proposes a comprehensive evaluation method for short-circuit current control strategies based on the analytic hierarchy process (AHP). This method aims to construct a structured evaluation system, decomposing complex decision-making problems into multiple levels such as objectives, criteria, and schemes, and quantifying the experience-based judgments of planning and operation personnel. By systematically considering short-circuit current exceeding the standard scenarios, the AHP is used to analyze and calculate the relative weights of each evaluation index, and different candidate strategies are comprehensively scored and ranked, thereby providing clear and reliable technical support for selecting the optimal short-circuit current control scheme in a specific scenario. This invention provides a method for selecting the optimal control scheme applicable to short-circuit current exceeding the standard scenarios. This method, based on the AHP, establishes an evaluation model of multi-dimensional influencing factors, calculates and compares the evaluation results of different schemes, thereby supporting the scientific decision-making of the optimal scheme, and referencing... Figure 2 As shown, the specific steps include the following: Step 1: Define the requirements for power grid short-circuit current control scenarios; Step 2: Establish a hierarchical structure using the Analytic Hierarchy Process (AHP), divided into an objective layer, a criterion layer, and a solution layer; In short-circuit current control, the short-circuit current control effect is taken as the target layer; taking into account the needs of short-circuit current control scenarios and the opinions of power research experts, N indicators under multiple levels are established in the criterion layer; according to the short-circuit current scenario, a variety of short-circuit current control optimization schemes are proposed to establish the scheme layer. Step 3: Assign values ​​to the N indicators at different levels established in the criteria layer through expert evaluation; The assignment requirement is that experts assign values ​​to multiple indicators at the same level according to their importance, based on the 1-9 scale method. Step 4: Rank the importance of different criterion layers and different specific indicator requirements within the same criterion layer, and construct a judgment matrix; Let Cij be the ratio of the importance of indicator i to indicator j. The matrix equations under different levels of indicators are formed by the expert assignments obtained in step 3. Step 5: Normalize each column of the judgment matrix to obtain a normalized matrix, then sum the row elements of the normalized matrix to obtain a new matrix composed of weight vectors, and finally calculate the weight ratio of each indicator through the weight vectors. Step 6: Summarize the calculation results obtained in Step 5 to obtain the weight table of the short-circuit current evaluation system index; Step 7: Analyze the implementation effects of different short-circuit current control schemes; Step 8: Analyze the impact of different short-circuit current control schemes on various indicators of the criterion layer; Step 9: Analyze and evaluate the specific performance of different short-circuit current control schemes under various criteria level indicators; Step 10: Summarize the results obtained in Steps 8 and 9, and summarize the performance of different solutions in multiple dimensions; Step 11: Output the comparison results of each short-circuit current control scheme under multiple dimensions.

[0035] Taking the XX station, a typical power station with excessive short-circuit current, as an example, it has three characteristics: new energy, large-scale access to energy storage, flexible DC grid connection point near the area, and close electrical connection at the 220kV level.

[0036] Based on the power grid short-circuit current control scenario and the analytic hierarchy process (AHP), the weights of each indicator in the evaluation system are calculated as shown in the table below: Table 1 Weights of Short-Circuit Current Evaluation System Indicators

[0037] Option 1: Based on the traditional short-circuit current control measures of bus de-looping, the de-looping scheme is determined by calculating the short-circuit current under different de-looping schemes and comparing the results of "N-1" fault scanning.

[0038] Table 2 Calculation results of short-circuit current at XX station before and after busbar opening and closing (Unit: kA)

[0039] Option 2: Adjustment of reactive power support coefficient for energy storage power stations The reactive current IT injected into the power system by the energy storage power station meets the requirements. , The terminal voltage generally meets the requirements. The plan was adjusted. The parameters were set to 1.0 to analyze the effect of reducing the reactive current contributed by the energy storage power station on reducing the short-circuit current level of the near-area bus substation exceeding the standard.

[0040] Table 3 Comparison of Short-Circuit Current Levels at Near-City Exceeding Busbar Sites under Different Short-Circuit Current Calculation Conditions

[0041] Option 3: Install a fast-switching fault current limiter Taking the 220kV side of XX station as an example, the station is equipped with one FCL device on each of the three main transformers' 220kV outgoing line sides. The current limiting impedance values ​​of the device are (temporarily) taken as 10Ω and 15Ω for analysis.

[0042] Table 4 Short-circuit current level of busbar on side 220 of XX station

[0043] Based on the above analysis of the short-circuit current suppression effect, all three schemes achieved the expected control objectives. Using the hierarchical analysis method indicators established in the previous sections, a comprehensive evaluation of urban power grid planning schemes was conducted, analyzing five aspects: stability, new energy / DC operating environment, flexibility, and economic benefits.

[0044] From three technologies Figure 4 Based on the radar chart analysis, Scheme 1 performs relatively well across all dimensions, except for a slight reduction in operational flexibility. Scheme 2 exhibits significant disadvantages in terms of new energy operating environment and stability. Scheme 3 has certain advantages in stability, flexibility, and new energy flexible DC operating environment, but performs poorly in terms of economic efficiency.

[0045] Based on the above analysis and weighting indicators, the preferred scheme for limiting short-circuit current at station XX is: Scheme 1 > Scheme 3 > Scheme 2.

[0046] Therefore, this invention aims to systematically analyze various short-circuit current exceeding scenarios, use the analytic hierarchy process (AHP) to quantitatively evaluate the performance of each control strategy under multi-dimensional indicators, and construct a set of scientific technical support by calculating indicator weights, conducting comprehensive scoring and ranking, thereby selecting the technically and economically optimal short-circuit current control scheme for specific scenarios.

[0047] Exemplary device Figure 4 This is a schematic diagram of the structure of a comprehensive evaluation device for a short-circuit current control scheme based on the analytic hierarchy process (AHP) provided in an exemplary embodiment of the present invention. Figure 4 As shown, the device 400 includes: The first construction module 410 is used to construct a hierarchical model containing a target layer, a criterion layer and a scheme layer based on the analytic hierarchy process for the short-circuit current exceeding the standard scenario of the target power grid. The criterion layer contains multiple preset evaluation indicators based on the short-circuit current exceeding the standard scenario, and the scheme layer contains multiple short-circuit current control strategies to be evaluated. The second construction module 420 is used to construct a judgment matrix and perform calculations based on experts' judgments on the importance of preset evaluation indicators, and to determine the weight of each preset evaluation indicator. The quantization module 430 is used to quantify the performance of each short-circuit current control strategy in the scheme layer under the preset evaluation index, and obtain the index performance dataset corresponding to each short-circuit current control strategy. The calculation module 440 is used to perform weighted comprehensive calculation on the index performance dataset corresponding to each short-circuit current control strategy based on the weight of each preset evaluation index, to obtain the comprehensive score of each short-circuit current control strategy, and to sort it accordingly, and output the optimization decision result.

[0048] Optionally, the preset evaluation indicators include at least one or more combinations of system stability level, DC system operating environment, new energy operating environment, grid flexibility and adaptability, and economic indicators.

[0049] Optionally, the short-circuit current control strategy includes at least one of the following: power grid structure change strategy, equipment operating parameter adjustment strategy, and current limiting device installation strategy.

[0050] Optionally, the second building module 420 includes: Obtain the importance values ​​assigned by experts based on the 1-9 scale method for the preset evaluation indicators; Based on importance assignment, a judgment matrix is ​​constructed for pairwise comparisons between indicators; The judgment matrix is ​​calculated and its consistency is checked to finally determine the weight vector.

[0051] Optionally, the quantization module 430 includes: The implementation effect of short-circuit current control strategies is analyzed through simulation calculations or actual operation data to evaluate their impact on various preset evaluation indicators and obtain the performance dataset of each short-circuit current control strategy.

[0052] Optionally, the computing module 440 includes: A weighted summation model is used to multiply the performance values ​​of each strategy under each evaluation indicator by the corresponding indicator weight and then sum them up to obtain a comprehensive score.

[0053] Exemplary electronic devices Figure 5 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. For example... Figure 5 As shown, the electronic device 50 includes one or more processors 51 and memory 52.

[0054] The processor 51 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0055] The memory 52 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 51 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 53 and an output device 54, these components being interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0056] In addition, the input device 53 may also include, for example, a keyboard, a mouse, etc.

[0057] The output device 54 can output various information to the outside. The output device 54 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0058] Of course, for the sake of simplicity, Figure 5 Only some of the components of this 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.

[0059] Exemplary computer program products and computer-readable storage media 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.

[0060] 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.

[0061] 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 according to various embodiments of the present invention described in the "Exemplary Methods" section above.

[0062] 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, system, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) 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 devices, magnetic storage devices, or any suitable combination thereof.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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. A comprehensive evaluation method for short-circuit current control schemes based on the analytic hierarchy process (AHP), characterized in that, include: For scenarios where the short-circuit current exceeds the standard in the target power grid, a hierarchical model containing a target layer, a criterion layer, and a scheme layer is constructed based on the analytic hierarchy process (AHP). The criterion layer contains multiple preset evaluation indicators based on the short-circuit current exceeding the standard scenario, and the scheme layer contains multiple short-circuit current control strategies to be evaluated. Based on the experts' judgment on the importance of the preset evaluation indicators, a judgment matrix is ​​constructed and calculated to determine the weight of each preset evaluation indicator. For each short-circuit current control strategy in the scheme layer, its performance under the preset evaluation index is quantified to obtain the index performance dataset corresponding to each short-circuit current control strategy. Based on the weights of each preset evaluation index, the performance datasets of each short-circuit current control strategy are weighted and comprehensively calculated to obtain a comprehensive score for each short-circuit current control strategy. The scores are then ranked accordingly, and the optimization decision results are output.

2. The method according to claim 1, characterized in that, The preset evaluation indicators include at least one or more combinations of system stability level, DC system operating environment, new energy operating environment, grid flexibility and adaptability, and economic indicators.

3. The method according to claim 1, characterized in that, The short-circuit current control strategy includes at least one of the following: power grid structure change strategy, equipment operating parameter adjustment strategy, and current limiting device installation strategy.

4. The method according to claim 1, characterized in that, Based on expert assessments of the importance of the preset evaluation indicators, a judgment matrix is ​​constructed and calculated to determine the weight of each preset evaluation indicator, including: The importance values ​​assigned by experts based on the 1-9 scale method to the preset evaluation indicators are obtained; Based on the aforementioned importance assignment, a judgment matrix is ​​constructed for pairwise comparisons between indicators; The judgment matrix is ​​calculated and its consistency is checked to finally determine the weight vector.

5. The method according to claim 1, characterized in that, For each short-circuit current control strategy in the scheme layer, its performance under the preset evaluation index is quantified to obtain the index performance dataset corresponding to each short-circuit current control strategy, including: The implementation effect of the short-circuit current control strategy is analyzed by simulation calculation or actual operation data to evaluate its impact on the preset evaluation indicators and obtain the indicator performance dataset corresponding to each short-circuit current control strategy.

6. The method according to claim 1, characterized in that, Based on the weights of each preset evaluation index, a weighted comprehensive calculation is performed on the performance datasets corresponding to each short-circuit current control strategy to obtain a comprehensive score for each short-circuit current control strategy, including: A weighted summation model is used to multiply the performance values ​​of each strategy under each evaluation index by the corresponding index weight and then sum them up to obtain the comprehensive score.

7. A comprehensive evaluation device for short-circuit current control schemes based on the analytic hierarchy process (AHP), used to implement the method described in any one of claims 1-6, characterized in that, include: The first construction module is used to construct a hierarchical model containing a target layer, a criterion layer, and a scheme layer based on the analytic hierarchy process for the short-circuit current exceeding the standard scenario of the target power grid. The criterion layer contains multiple preset evaluation indicators based on the short-circuit current exceeding the standard scenario, and the scheme layer contains multiple short-circuit current control strategies to be evaluated. The second construction module is used to construct a judgment matrix and perform calculations based on the experts' judgments on the importance of the preset evaluation indicators, and to determine the weight of each preset evaluation indicator. The quantization module is used to quantify the performance of each short-circuit current control strategy in the scheme layer under the preset evaluation index, and obtain the index performance dataset corresponding to each short-circuit current control strategy. The calculation module is used to perform weighted comprehensive calculation on the index performance dataset corresponding to each short-circuit current control strategy based on the weight of each preset evaluation index, obtain the comprehensive score of each short-circuit current control strategy, sort it accordingly, and output the optimization decision result.

8. The apparatus according to claim 7, characterized in that, The preset evaluation indicators include at least one or more combinations of system stability level, DC system operating environment, new energy operating environment, grid flexibility and adaptability, and economic indicators.

9. The apparatus according to claim 7, characterized in that, The short-circuit current control strategy includes at least one of the following: power grid structure change strategy, equipment operating parameter adjustment strategy, and current limiting device installation strategy.

10. The apparatus according to claim 7, characterized in that, The second building module includes: The importance values ​​assigned by experts based on the 1-9 scale method to the preset evaluation indicators are obtained; Based on the aforementioned importance assignment, a judgment matrix is ​​constructed for pairwise comparisons between indicators; The judgment matrix is ​​calculated and its consistency is checked to finally determine the weight vector.

11. The apparatus according to claim 7, characterized in that, The quantization module includes: The implementation effect of the short-circuit current control strategy is analyzed by simulation calculation or actual operation data to evaluate its impact on the preset evaluation indicators and obtain the indicator performance dataset corresponding to each short-circuit current control strategy.

12. The apparatus according to claim 7, characterized in that, The calculation module includes: A weighted summation model is used to multiply the performance values ​​of each strategy under each evaluation index by the corresponding index weight and then sum them up to obtain the comprehensive score.

13. A computer-readable storage medium, characterized in that, The storage medium stores a computer program for performing the method described in any one of claims 1-6.

14. 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 described in any one of claims 1-6.

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