A method and apparatus for evaluating the regulation effect of transient overvoltage suppression devices.

Abstract

This invention provides a method and apparatus for evaluating the regulation effect of transient overvoltage suppression devices, relating to the field of modeling technology. The method includes: obtaining regulation effect evaluation indicators corresponding to each transient overvoltage suppression device; each regulation effect evaluation indicator includes the fault phase voltage recovery time ratio, a first transient overvoltage coefficient, and a second transient overvoltage coefficient; calculating a comprehensive score corresponding to each transient overvoltage suppression device based on each regulation effect evaluation indicator and its corresponding weight; evaluating the regulation effect of each transient overvoltage suppression device based on each comprehensive score to obtain a regulation effect evaluation result. The apparatus executes the above method. The method and apparatus for evaluating the regulation effect of transient overvoltage suppression devices provided by this invention can improve the accuracy and flexibility of the evaluation results of the regulation effect of transient overvoltage suppression devices.

Description

Technical Field

[0001] This invention relates to the field of modeling technology, and specifically to a method and apparatus for evaluating the regulation effect of a transient overvoltage suppression device. Background Technology

[0002] With the continuous construction of new power systems, the grid and power source structures of power systems have undergone tremendous changes. The high penetration rate of new energy sources and the high proportion of power electronic devices have led to a continuous decrease in the system's short-circuit capacity and a gradual reduction in its voltage regulation and support capabilities. Currently, transient overvoltage problems are one of the main factors limiting the large-scale transmission of new energy sources through AC / DC grids. Wind power, photovoltaic, and other new energy generation units are connected to the grid through fast-controlled power electronic converters, lacking active support capabilities. After a fault in the AC / DC transmission system, the low-voltage ride-through control of new energy sources may further cause excessively high transient voltage rises after system recovery, thereby inducing large-scale disconnection of new energy sources from the grid, posing a significant challenge to the safe operation of the grid and the absorption of new energy. Therefore, it is urgent to install suitable transient overvoltage suppression equipment. In recent years, synchronous condensers, static var generators, and flexible power transformers have attracted widespread attention due to their excellent reactive power regulation capabilities and ability to effectively suppress transient overvoltages. However, there is still no effective method to evaluate the regulation effect of transient overvoltage suppression equipment.

[0003] To address overvoltage issues in the system, it is necessary to select appropriate overvoltage suppression equipment based on the operating scenario and key requirements. However, different types of overvoltage suppression equipment have different working principles and grid connection characteristics, making it difficult to objectively and quantitatively evaluate the advantages and disadvantages of different design schemes during the planning and design phase. Summary of the Invention

[0004] To address the problems in the prior art, embodiments of the present invention provide a method and apparatus for evaluating the regulation effect of a transient overvoltage suppression device, which can at least partially solve the problems existing in the prior art.

[0005] On the one hand, this invention proposes a method for evaluating the regulation effect of a transient overvoltage suppression device, comprising:

[0006] Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0007] Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated.

[0008] The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained.

[0009] The acquisition of the regulation effect evaluation index corresponding to each transient overvoltage suppression device includes:

[0010] The ratio of the fault phase voltage recovery time corresponding to each transient overvoltage suppression device to the fault phase voltage recovery time of the initial model without each transient overvoltage suppression device is used as the fault phase voltage recovery time ratio.

[0011] The acquisition of the regulation effect evaluation index corresponding to each transient overvoltage suppression device includes:

[0012] The ratio of the maximum instantaneous value of the neutral point voltage to the phase voltage value during the transient process when a ground fault occurs, corresponding to each transient overvoltage suppression device, is used as the first transient overvoltage coefficient.

[0013] The acquisition of the regulation effect evaluation index corresponding to each transient overvoltage suppression device includes:

[0014] The ratio of the maximum instantaneous voltage value to the steady-state voltage value at the moment of fault clearance for each transient overvoltage suppression device is used as the second transient overvoltage coefficient.

[0015] Prior to the step of obtaining the regulation effect evaluation index corresponding to each transient overvoltage suppression device, the method for evaluating the regulation effect of the transient overvoltage suppression device further includes:

[0016] Simulation data is collected based on the simulation results of pre-built synchronous condenser model, SVG model and flexible power transformer model; the simulation data includes the three-phase instantaneous voltage at the wind turbine outlet and the instantaneous voltage at the transformer neutral point;

[0017] Based on the three-phase instantaneous voltage and the transformer neutral point instantaneous voltage, obtain the voltage recovery time of each faulted phase, the maximum instantaneous value of the neutral point voltage, the phase voltage value, the maximum instantaneous value of the voltage, and the steady-state voltage value.

[0018] Prior to the step of collecting simulation data based on the simulation results of the pre-built synchronous condenser model, SVG model, and flexible power transformer model, the method for evaluating the regulation effect of the transient overvoltage suppression device further includes:

[0019] The synchronous condenser model, the SVG model, and the flexible power transformer model are constructed based on the pre-built electromagnetic transient model of the research area, the parameters of the synchronous condenser of the same capacity, the parameters of the SVG, and the parameters of the flexible power transformer.

[0020] On one hand, the present invention proposes a device for evaluating the regulation effect of a transient overvoltage suppression device, comprising:

[0021] The acquisition unit is used to acquire the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0022] The calculation unit is used to calculate the comprehensive score corresponding to each transient overvoltage suppression device based on each regulation effect evaluation index and its corresponding evaluation index weight.

[0023] The evaluation unit is used to evaluate the regulation effect of each transient overvoltage suppression device based on the comprehensive score, and obtain the regulation effect evaluation result.

[0024] In another aspect, embodiments of the present invention provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the following method:

[0025] Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0026] Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated.

[0027] The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained.

[0028] This invention provides a computer-readable storage medium, comprising:

[0029] The computer-readable storage medium stores a computer program that, when executed by a processor, implements the following method:

[0030] Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0031] Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated.

[0032] The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained.

[0033] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the following method:

[0034] Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0035] Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated.

[0036] The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained.

[0037] The present invention provides a method and apparatus for evaluating the regulation effect of transient overvoltage suppression devices. It obtains regulation effect evaluation indicators corresponding to each transient overvoltage suppression device. Each regulation effect evaluation indicator includes the fault phase voltage recovery time ratio, a first transient overvoltage coefficient, and a second transient overvoltage coefficient. Based on each regulation effect evaluation indicator and its corresponding weight, a comprehensive score corresponding to each transient overvoltage suppression device is calculated. The regulation effect of each transient overvoltage suppression device is evaluated based on its comprehensive score to obtain the regulation effect evaluation result. This method improves the accuracy and flexibility of the regulation effect evaluation result of transient overvoltage suppression devices. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0039] Figure 1 This is a flowchart illustrating a method for evaluating the regulation effect of a transient overvoltage suppression device according to an embodiment of the present invention.

[0040] Figure 2 This is a schematic diagram of the structure of a device for evaluating the regulation effect of a transient overvoltage suppression device provided in an embodiment of the present invention.

[0041] Figure 3 This is a schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0043] Explanation of relevant terms:

[0044] Transient overvoltage: is an overvoltage that occurs when the power system experiences a transient process and then returns to a certain temporary stability due to factors such as circuit breaker operation or short-circuit fault.

[0045] Transient overvoltage suppression equipment: refers to equipment installed in a power system that has a fast reactive power compensation function and plays a role in raising or suppressing the voltage of the power system. The embodiments of this invention include three types: synchronous condenser, static var generator (SVG), and flexible power transformer.

[0046] Figure 1 This is a flowchart illustrating a method for evaluating the regulation effect of a transient overvoltage suppression device according to an embodiment of the present invention, as shown below. Figure 1 As shown, the method for evaluating the regulation effect of a transient overvoltage suppression device provided in this embodiment of the invention includes:

[0047] Step S1: Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient.

[0048] Step S2: Calculate the comprehensive score corresponding to each transient overvoltage suppression device based on each regulation effect evaluation index and its corresponding weight.

[0049] Step S3: Evaluate the regulation effect of each transient overvoltage suppression device based on the comprehensive score, and obtain the regulation effect evaluation result.

[0050] In step S1 above, the device acquires the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient. The device can be a computer device, such as a server, that performs this method. The acquisition, storage, use, and processing of data in the technical solution of this application all comply with relevant regulations.

[0051] The fault phase voltage recovery time refers to the time required for the fault phase voltage to recover to 90% of the normal voltage after the ground fault disappears. The smaller this value, the better.

[0052] To simulate different operating conditions, various transient overvoltage suppression devices are added to the initial model. The initial model can be a pre-built electromagnetic transient model of the study area.

[0053] Operating Condition 1: Initial Model.

[0054] Case 2: Add a camera adjustment device to the initial model.

[0055] Case 3: Add SVG to the initial model.

[0056] Operating Condition 4: Add a flexible power transformer to the initial model.

[0057] Fault phase voltage recovery time ratio X i1 =T(i) / T0

[0058] Where i=1 is the synchronous condenser, i=2 is the SVG, i=3 is the flexible power transformer, T(i) is the fault phase voltage recovery time of the i-th transient overvoltage suppression device, and T0 is the fault phase voltage recovery time of the initial model.

[0059] The first transient overvoltage coefficient K1 refers to the ratio of the maximum instantaneous value of the neutral point voltage Unmax to the phase voltage value U during the transient process when a ground fault occurs. The smaller this value is, the better.

[0060] First transient overvoltage coefficient X i2 =K1(i)=Unmax(i) / U(i)

[0061] Wherein, K1(i) is the first transient overvoltage coefficient of the i-th transient overvoltage suppression device, Unmax(i) is the maximum instantaneous value of the neutral point voltage of the i-th transient overvoltage suppression device, and U(i) is the phase voltage value of the i-th transient overvoltage suppression device.

[0062] The second transient overvoltage coefficient K2 is the ratio of the maximum instantaneous voltage Umax at the moment the fault is cleared to the steady-state voltage Un. The smaller this value is, the better.

[0063] Second transient overvoltage coefficient X i3 =K2(i)=Umax(i) / Un(i)

[0064] Wherein, K2(i) is the second transient overvoltage coefficient of the i-th transient overvoltage suppression device, Umax(i) is the maximum instantaneous voltage value of the i-th transient overvoltage suppression device at the moment of fault clearance, and Un(i) is the steady-state voltage value of the i-th transient overvoltage suppression device.

[0065] In step S2 above, the device calculates the comprehensive score corresponding to each transient overvoltage suppression device based on each regulation effect evaluation index and its corresponding evaluation index weight.

[0066] Evaluation indicator weights Among them, a j The weighting coefficients for each regulation effect evaluation index can be set autonomously according to the operating scenario and key requirements of the transient overvoltage suppression equipment. Here, j=1 is the fault phase voltage recovery time ratio, j=2 is the first transient overvoltage coefficient, and j=3 is the second transient overvoltage coefficient.

[0067] The comprehensive score corresponding to each transient overvoltage suppression device

[0068] In step S3 above, the device evaluates the regulation effect of each transient overvoltage suppression device based on its comprehensive score, and obtains the evaluation result of the regulation effect. The comprehensive scores of each transient overvoltage suppression device can be sorted from smallest to largest; a lower score indicates a better effect. The method for evaluating the regulation effect of the transient overvoltage suppression device provided in this embodiment of the invention is further explained below:

[0069] Obtain system parameters, including grid structure (lines, transformers, capacitors, reactors, etc.), new energy units and load parameters, and parameters of synchronous condensers, SVG, and flexible power transformers of the same capacity.

[0070] Equivalent system parameter calculation, by using the network equivalent function of existing related software, determines the node voltage values ​​and the per-unit values ​​of the equivalent branches between nodes and ground in a multi-point network. Through equivalent system parameter calculation, the simulation of system parameters in the power grid can be realized.

[0071] An electromagnetic transient model of the study area is constructed based on the grid structure (lines, transformers, capacitors, reactors, etc.), new energy units, and load parameters.

[0072] The synchronous condenser model, the SVG model, and the flexible power transformer model are constructed based on the pre-built electromagnetic transient model of the research area, the parameters of the synchronous condenser of the same capacity, the parameters of the SVG, and the parameters of the flexible power transformer.

[0073] Fault scanning was performed, and simulation data was collected. Fault types included single-phase grounding faults on the 220kV / 110kV output lines of new energy power plants. Fault scanning was conducted under the above four operating conditions, and simulation data was collected including the three-phase instantaneous voltage at the wind turbine outlet and the instantaneous voltage at the transformer neutral point, corresponding to the synchronous condenser, SVG, and flexible power transformer, respectively.

[0074] Based on the three-phase instantaneous voltages and the transformer neutral point instantaneous voltage, the recovery time of each faulted phase voltage, the maximum instantaneous value of the neutral point voltage, the phase voltage value, the maximum instantaneous value of the voltage, and the steady-state voltage value are obtained. This step is a conventional implementation method in this field and will not be described in detail further.

[0075] The method of this invention can meet the following technical requirements:

[0076] ① The grid-connected characteristics of different types of transient overvoltage suppression equipment can be quantified, including the recovery time of the fault phase voltage and the transient overvoltage coefficient;

[0077] ② It can automatically assign weight values ​​to various characteristics of different types of transient overvoltage suppression devices according to different application scenarios;

[0078] ③ It can automatically calculate the comprehensive score of different transient overvoltage suppression devices in the same application scenario.

[0079] The method for evaluating the regulation effect of transient overvoltage suppression devices provided in this invention has the following beneficial technical effects:

[0080] 1. By incorporating the maximum instantaneous value of the neutral point voltage during the transient process into the calculation of the transient overvoltage coefficient K1, the suppression effect of the transient overvoltage device can be intuitively judged.

[0081] 2. Applicable to large-scale new energy transmission scenarios in the planning and research stage, providing a reference for enterprises to invest in transient overvoltage suppression equipment.

[0082] The method for evaluating the regulation effect of transient overvoltage suppression devices provided in this invention obtains regulation effect evaluation indicators corresponding to each transient overvoltage suppression device. Each regulation effect evaluation indicator includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient. Based on each regulation effect evaluation indicator and its corresponding weight, a comprehensive score corresponding to each transient overvoltage suppression device is calculated. The regulation effect of each transient overvoltage suppression device is evaluated based on each comprehensive score to obtain the regulation effect evaluation result, which can improve the accuracy and flexibility of the regulation effect evaluation result of transient overvoltage suppression devices.

[0083] Furthermore, the acquisition of the regulation effect evaluation index corresponding to each transient overvoltage suppression device includes:

[0084] The ratio of the fault phase voltage recovery time corresponding to each transient overvoltage suppression device to the fault phase voltage recovery time of the initial model without the transient overvoltage suppression devices is used as the fault phase voltage recovery time ratio. This can be referred to the description in the above embodiments, and will not be repeated here.

[0085] Furthermore, the acquisition of the regulation effect evaluation index corresponding to each transient overvoltage suppression device includes:

[0086] The ratio of the maximum instantaneous value of the neutral point voltage to the phase voltage value during the transient process when a ground fault occurs, corresponding to each transient overvoltage suppression device, is used as the first transient overvoltage coefficient. This can be referred to the description in the above embodiments, and will not be repeated here.

[0087] Furthermore, the acquisition of the regulation effect evaluation index corresponding to each transient overvoltage suppression device includes:

[0088] The ratio of the maximum instantaneous voltage value to the steady-state voltage value at the moment of fault clearance for each transient overvoltage suppression device is used as the second transient overvoltage coefficient. This can be referred to the description in the above embodiments, and will not be repeated here.

[0089] Furthermore, before the step of obtaining the regulation effect evaluation index corresponding to each transient overvoltage suppression device, the method for evaluating the regulation effect of the transient overvoltage suppression device further includes:

[0090] Simulation data is collected based on the simulation results of the pre-built synchronous condenser model, SVG model, and flexible power transformer model; the simulation data includes the three-phase instantaneous voltage at the wind turbine outlet and the instantaneous voltage at the transformer neutral point; the description in the above embodiment can be referred to, and will not be repeated here.

[0091] Based on the three-phase instantaneous voltages and the transformer neutral point instantaneous voltage, the recovery time of each faulted phase voltage, the maximum instantaneous value of the neutral point voltage, the phase voltage value, the maximum instantaneous value of the voltage, and the steady-state voltage value are obtained. Refer to the description in the above embodiment; further details are omitted.

[0092] Furthermore, prior to the step of collecting simulation data based on the simulation results of the pre-built synchronous condenser model, SVG model, and flexible power transformer model, the method for evaluating the regulation effect of the transient overvoltage suppression device further includes:

[0093] The synchronous condenser model, the SVG model, and the flexible power transformer model are constructed based on the pre-built electromagnetic transient model of the research area, the parameters of the synchronous condenser of the same capacity, the parameters of the SVG, and the parameters of the flexible power transformer. Refer to the description in the above embodiments; further details are omitted here.

[0094] Figure 2 This is a schematic diagram of the structure of a transient overvoltage suppression device regulation effect evaluation device provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the transient overvoltage suppression device for evaluating its regulation effect provided in this embodiment of the invention includes an acquisition unit 201, a calculation unit 202, and an evaluation unit 203, wherein:

[0095] The acquisition unit 201 is used to acquire the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient; the calculation unit 202 is used to calculate the comprehensive score corresponding to each transient overvoltage suppression device according to each regulation effect evaluation index and its corresponding evaluation index weight; the evaluation unit 203 is used to evaluate the regulation effect of each transient overvoltage suppression device according to each comprehensive score, and obtain the regulation effect evaluation result.

[0096] Specifically, the acquisition unit 201 in the device is used to acquire the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient; the calculation unit 202 is used to calculate the comprehensive score corresponding to each transient overvoltage suppression device according to each regulation effect evaluation index and its corresponding evaluation index weight; the evaluation unit 203 is used to evaluate the regulation effect of each transient overvoltage suppression device according to each comprehensive score, and obtain the regulation effect evaluation result.

[0097] The transient overvoltage suppression device provided in this embodiment of the invention obtains regulation effect evaluation indicators corresponding to each transient overvoltage suppression device. Each regulation effect evaluation indicator includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient. Based on each regulation effect evaluation indicator and its corresponding weight, a comprehensive score corresponding to each transient overvoltage suppression device is calculated. The regulation effect of each transient overvoltage suppression device is evaluated based on each comprehensive score to obtain the regulation effect evaluation result, which can improve the accuracy and flexibility of the regulation effect evaluation result of the transient overvoltage suppression device.

[0098] Furthermore, the acquisition unit 201 is specifically used for:

[0099] The ratio of the fault phase voltage recovery time corresponding to each transient overvoltage suppression device to the fault phase voltage recovery time of the initial model without each transient overvoltage suppression device is used as the fault phase voltage recovery time ratio.

[0100] Furthermore, the acquisition unit 201 is specifically used for:

[0101] The ratio of the maximum instantaneous value of the neutral point voltage to the phase voltage value during the transient process when a ground fault occurs, corresponding to each transient overvoltage suppression device, is used as the first transient overvoltage coefficient.

[0102] Furthermore, the acquisition unit 201 is specifically used for:

[0103] The ratio of the maximum instantaneous voltage value to the steady-state voltage value at the moment of fault clearance for each transient overvoltage suppression device is used as the second transient overvoltage coefficient.

[0104] Furthermore, before the step of obtaining the regulation effect evaluation index corresponding to each transient overvoltage suppression device, the regulation effect evaluation device of the transient overvoltage suppression device is also used for:

[0105] Simulation data is collected based on the simulation results of pre-built synchronous condenser model, SVG model and flexible power transformer model; the simulation data includes the three-phase instantaneous voltage at the wind turbine outlet and the instantaneous voltage at the transformer neutral point;

[0106] Based on the three-phase instantaneous voltage and the transformer neutral point instantaneous voltage, obtain the voltage recovery time of each faulted phase, the maximum instantaneous value of the neutral point voltage, the phase voltage value, the maximum instantaneous value of the voltage, and the steady-state voltage value.

[0107] Furthermore, before the step of collecting simulation data based on the simulation results of the pre-built synchronous condenser model, SVG model, and flexible power transformer model, the transient overvoltage suppression device for evaluating the regulation effect is also used for:

[0108] The synchronous condenser model, the SVG model, and the flexible power transformer model are constructed based on the pre-built electromagnetic transient model of the research area, the parameters of the synchronous condenser of the same capacity, the parameters of the SVG, and the parameters of the flexible power transformer.

[0109] The embodiments of the present invention provide an evaluation device for the regulation effect of transient overvoltage suppression equipment, which can be used to execute the processing flow of the above-described method embodiments. Its function will not be repeated here, but can be referred to the detailed description of the above-described method embodiments.

[0110] Figure 3 This is a schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention, such as... Figure 3 As shown, the computer device includes: a memory 301, a processor 302, and a computer program stored in the memory 301 and executable on the processor 302. When the processor 302 executes the computer program, it implements the following method:

[0111] Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0112] Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated.

[0113] The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained.

[0114] This embodiment discloses a computer program product, which includes a computer program that, when executed by a processor, implements the following method:

[0115] Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0116] Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated.

[0117] The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained.

[0118] This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the following method:

[0119] Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient;

[0120] Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated.

[0121] The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained.

[0122] Compared with existing technologies, this invention provides an evaluation index for the regulation effect of each transient overvoltage suppression device. Each evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient. Based on each evaluation index and its corresponding weight, a comprehensive score is calculated for each transient overvoltage suppression device. The regulation effect of each transient overvoltage suppression device is evaluated based on its comprehensive score, resulting in an evaluation result that improves the accuracy and flexibility of the evaluation results.

[0123] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0124] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0125] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0126] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0127] In the description of this specification, the references to terms such as "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0128] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for evaluating the regulation effect of a transient overvoltage suppression device, characterized in that, include: Obtain the regulation effect evaluation index corresponding to each transient overvoltage suppression device; each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient and the second transient overvoltage coefficient; the transient overvoltage suppression device is installed in the power system and has a fast reactive power compensation function, which plays a role in raising or suppressing the voltage of the power system in which it is located, including synchronous condensers, static var generators (SVG) and flexible power transformers. Based on each regulation effect evaluation index and its corresponding weight, the comprehensive score corresponding to each transient overvoltage suppression device is calculated. The regulation effect of each transient overvoltage suppression device is evaluated based on the comprehensive score, and the evaluation results of the regulation effect are obtained. The acquisition of the regulation effect evaluation indicators corresponding to each transient overvoltage suppression device includes: The ratio of the fault phase voltage recovery time corresponding to each transient overvoltage suppression device to the fault phase voltage recovery time of the initial model without each transient overvoltage suppression device is taken as the fault phase voltage recovery time ratio. The ratio of the maximum instantaneous value of the neutral point voltage to the phase voltage value during the transient process when a ground fault occurs, corresponding to each transient overvoltage suppression device, is used as the first transient overvoltage coefficient. The ratio of the maximum instantaneous voltage value to the steady-state voltage value at the moment of fault clearance for each transient overvoltage suppression device is used as the second transient overvoltage coefficient.

2. The method for evaluating the regulation effect of the transient overvoltage suppression device according to claim 1, characterized in that, Before the step of obtaining the regulation effect evaluation index corresponding to each transient overvoltage suppression device, the method for evaluating the regulation effect of the transient overvoltage suppression device further includes: Simulation data is collected based on the simulation results of pre-built synchronous condenser model, SVG model and flexible power transformer model; the simulation data includes the three-phase instantaneous voltage at the wind turbine outlet and the instantaneous voltage at the transformer neutral point; Based on the three-phase instantaneous voltage and the transformer neutral point instantaneous voltage, obtain the voltage recovery time of each faulted phase, the maximum instantaneous value of the neutral point voltage, the phase voltage value, the maximum instantaneous value of the voltage, and the steady-state voltage value.

3. The method for evaluating the regulation effect of the transient overvoltage suppression device according to claim 2, characterized in that, Before the step of collecting simulation data based on the simulation results of the pre-built synchronous condenser model, SVG model, and flexible power transformer model, the method for evaluating the regulation effect of the transient overvoltage suppression device further includes: The synchronous condenser model, the SVG model, and the flexible power transformer model are constructed based on the pre-built electromagnetic transient model of the research area, the parameters of the synchronous condenser of the same capacity, the parameters of the SVG, and the parameters of the flexible power transformer.

4. A device for evaluating the regulation effect of a transient overvoltage suppression device, characterized in that, include: The acquisition unit is used to acquire the regulation effect evaluation index corresponding to each transient overvoltage suppression device. Each regulation effect evaluation index includes the fault phase voltage recovery time ratio, the first transient overvoltage coefficient, and the second transient overvoltage coefficient. The transient overvoltage suppression device is installed in the power system and has a fast reactive power compensation function. It plays a role in raising or suppressing the voltage of the power system in which it is located. It includes a synchronous condenser, a static var generator (SVG), and a flexible power transformer. The calculation unit is used to calculate the comprehensive score corresponding to each transient overvoltage suppression device based on each regulation effect evaluation index and its corresponding evaluation index weight. The evaluation unit is used to evaluate the regulation effect of each transient overvoltage suppression device based on the comprehensive score, and obtain the regulation effect evaluation result; The acquisition unit is specifically used for: The ratio of the fault phase voltage recovery time corresponding to each transient overvoltage suppression device to the fault phase voltage recovery time of the initial model without each transient overvoltage suppression device is taken as the fault phase voltage recovery time ratio. The ratio of the maximum instantaneous value of the neutral point voltage to the phase voltage value during the transient process when a ground fault occurs, corresponding to each transient overvoltage suppression device, is used as the first transient overvoltage coefficient. The ratio of the maximum instantaneous voltage value to the steady-state voltage value at the moment of fault clearance for each transient overvoltage suppression device is used as the second transient overvoltage coefficient.

5. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 3.

7. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 3.

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