Method for siting grid-forming static var generator, program product and related device

Abstract

This application relates to a location method, program product, and related equipment for a grid-type static var generator (SVR). The method includes: acquiring multiple sets of candidate schemes, each set including several location nodes; calculating the total power supply capacity connected to each location node, obtaining the annual maximum active power flow and values ​​of multiple preset indicators for each location node; determining the weight coefficients of each preset indicator in the corresponding location node based on the annual maximum active power flow and total power supply capacity; calculating the location base number of the corresponding location node based on the preset indicator values ​​and weight coefficients; selecting several location nodes sequentially in descending order of the location base number as candidate nodes; calculating the average location base number of the corresponding candidate schemes; and selecting the candidate node in the candidate scheme with the highest average location base number as the final location target. This invention, by connecting the grid-type SVR to the location target, can improve grid stability to meet grid operation requirements.

Description

Technical Field

[0001] This invention relates to the field of power grid technology, and in particular to a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for selecting a grid-type static var generator. Background Technology

[0002] With the acceleration of urbanization, the diversified load development in cities is showing new characteristics. High-density, high-impact loads such as data centers, rail transit, and high-rise building clusters are emerging in large numbers, and new sources of load such as distributed new energy and electric vehicles are widely connected to the distribution network. The voltage stability, power quality, and system inertia support capacity of the traditional power grid are all facing challenges. As an advanced power electronic device, the grid-type static var generator not only has the dynamic reactive power compensation capability of the traditional static var generator, but can also simulate a synchronous generator to actively construct and support the voltage and frequency of the power grid.

[0003] The investment cost of grid-type static var generators is relatively high, and their effectiveness depends to a large extent on their deployment location in the power grid. How to select the best installation location to achieve the greatest power grid improvement benefits is a key scientific problem that urgently needs to be solved.

[0004] Currently, site selection investment plans are greatly influenced by the owner's subjective will, and traditional site selection methods often focus on single indicators or experience-based judgments, lacking overall site selection planning and scheme comparison. Although some studies have introduced multi-indicator evaluation, the indicator system is not well constructed, resulting in insufficient accuracy and reliability of site selection results, making it difficult to adapt to the complex and ever-changing power grid operation needs under the diverse load scenarios in cities. Summary of the Invention

[0005] Based on this, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for selecting a grid-type static var generator (SVR) that can improve grid stability and meet grid operation requirements after being connected to the grid-type SVR, in order to address the above-mentioned technical problems.

[0006] Firstly, this application provides a method for selecting the location of a grid-type static var generator, including:

[0007] Obtain multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0008] The total power supply capacity connected to each of the selected nodes is calculated, and the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node are obtained.

[0009] Based on the maximum active power flow output and the total capacity of the power source in that year, determine the weight coefficients of each preset indicator in the corresponding location node.

[0010] The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number.

[0011] Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained.

[0012] When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes equals the total planned installation capacity, calculate the average location base of the corresponding candidate schemes;

[0013] The candidate node in the candidate scheme with the highest average location base is used as the location target of the grid-type static var generator.

[0014] In one embodiment, the weighting coefficients of each preset index in the corresponding location node are determined based on the maximum active power flow output in that year and the total power supply capacity, including:

[0015] If the annual maximum active power flow of the selected node is greater than or equal to half of the total power supply capacity, obtain the first set of weighting coefficients that are mapped to each of the preset indicators.

[0016] If the annual maximum active power flow of the selected node is less than half of the total power supply capacity, a second set of weighting coefficients is obtained that maps to each of the preset indicators. The values ​​of the second set of weighting coefficients are different from those of the first set of weighting coefficients.

[0017] In one embodiment, the preset indicator includes the dynamic voltage recovery time of the addressing node; the step of obtaining the value of the preset indicator includes:

[0018] Obtain the starting moment when the transient voltage amplitude reaches its lowest value during a power system fault;

[0019] Obtain the recovery time when the transient voltage amplitude returns to normal.

[0020] The difference between the recovery time and the start time is taken as the dynamic voltage recovery time.

[0021] In one embodiment, the preset index includes the dynamic voltage recovery amplitude of the address node, and the step of obtaining the value of the preset index includes:

[0022] The minimum value of transient voltage amplitude when a power system fault occurs;

[0023] Obtain the second amplitude value of the transient voltage when it recovers to the normal state;

[0024] The difference between the second amplitude and the lowest value is taken as the dynamic voltage recovery amplitude.

[0025] In one embodiment, the preset index includes the short-circuit ratio level index of the location node, and the step of obtaining the value of the preset index includes:

[0026] Monitor the short-circuit ratio of the power system at this selected node during normal operation;

[0027] When the short-circuit ratio is less than or equal to the preset first threshold, the value of the short-circuit ratio level index of the corresponding location node is set to 0;

[0028] When the short-circuit ratio is greater than the first threshold, the value of the short-circuit ratio level index of the corresponding location node is determined to be 1.

[0029] In one embodiment, the preset index includes a stable voltage deviation index and a voltage harmonic index for the address node; the step of obtaining the value of the preset index includes:

[0030] Monitor the voltage deviation and total harmonic distortion of the power system during normal operation at the selected node;

[0031] When the voltage deviation is greater than or equal to the preset second threshold, the value of the stable voltage deviation index of the corresponding address node is set to 0; otherwise, the value of the stable voltage deviation index of the corresponding address node is set to 1.

[0032] When the total harmonic distortion of the voltage is greater than or equal to the preset third threshold, the voltage harmonic index of the corresponding address node is set to 0; otherwise, the voltage harmonic index of the corresponding address node is set to 1.

[0033] Secondly, this application also provides a location device for a grid-type static var generator, comprising:

[0034] The scheme acquisition module is used to acquire multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0035] The statistics module is used to calculate the total power supply capacity connected to each of the selected nodes, and to obtain the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node.

[0036] The coefficient determination module is used to determine the weight coefficients of each preset index in the corresponding location node based on the maximum active power flow and the total capacity of the power supply in that year.

[0037] The sorting module is used to calculate the location base number of the corresponding location node according to the value of the preset index and the weight coefficient, and sort the location nodes in the same group of candidate schemes according to the size of the location base number.

[0038] The capacity acquisition module is used to select several site selection nodes as candidate nodes in descending order of the site selection base number, and obtain the preset planned installation capacity corresponding to each candidate node.

[0039] The calculation module is used to calculate the average site selection base of the corresponding candidate scheme when the sum of the planned installation capacity of each candidate node in the same group of candidate schemes is equal to the total planned installation capacity.

[0040] The target determination module is used to select the candidate node in the candidate scheme with the highest average location base as the location target of the network-type static var generator.

[0041] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0042] Obtain multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0043] The total power supply capacity connected to each of the selected nodes is calculated, and the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node are obtained.

[0044] Based on the maximum active power flow output and the total capacity of the power source in that year, determine the weight coefficients of each preset indicator in the corresponding location node.

[0045] The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number.

[0046] Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained.

[0047] When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes equals the total planned installation capacity, calculate the average location base of the corresponding candidate schemes;

[0048] The candidate node in the candidate scheme with the highest average location base is used as the location target of the grid-type static var generator.

[0049] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0050] Obtain multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0051] The total power supply capacity connected to each of the selected nodes is calculated, and the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node are obtained.

[0052] Based on the maximum active power flow output and the total capacity of the power source in that year, determine the weight coefficients of each preset indicator in the corresponding location node.

[0053] The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number.

[0054] Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained.

[0055] When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes equals the total planned installation capacity, calculate the average location base of the corresponding candidate schemes;

[0056] The candidate node in the candidate scheme with the highest average location base is used as the location target of the grid-type static var generator.

[0057] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0058] Obtain multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0059] The total power supply capacity connected to each of the selected nodes is calculated, and the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node are obtained.

[0060] Based on the maximum active power flow output and the total capacity of the power source in that year, determine the weight coefficients of each preset indicator in the corresponding location node.

[0061] The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number.

[0062] Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained.

[0063] When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes equals the total planned installation capacity, calculate the average location base of the corresponding candidate schemes;

[0064] The candidate node in the candidate scheme with the highest average location base is used as the location target of the grid-type static var generator.

[0065] The aforementioned method, apparatus, computer equipment, computer-readable storage medium, and computer program product for selecting network-type static var generators (SVRs) obtain the annual maximum active power flow and multiple preset index values ​​for each SVR by statistically analyzing the total power supply capacity connected to each SVR node. Based on the annual maximum active power flow and the total power supply capacity, the weight coefficients of each preset index in the corresponding SVR node are determined. This ensures that the weight coefficients of each index used to select the SVR location target simultaneously consider the maximum active power flow and the total power supply capacity. When finally determining the location target, this application first selects the SVR with a relatively large location base from each group of candidate schemes. Large candidate nodes are selected, and then, based on the average location base in the same group of candidate schemes, the candidate node in the candidate scheme with the highest average location base is selected as the location target for the grid-type static var generator. This allows multiple indicators that affect the grid operation requirements to be considered simultaneously when selecting the location of the grid-type static var generator, and the influence of each indicator on the location result is adjusted according to the weight coefficient. By selecting the location node in both the dimension of each group of candidate schemes and the dimension of multiple groups of candidate schemes, the final selected location target can ensure the grid stability after the grid-type static var generator is connected to meet the grid operation requirements. Attached Figure Description

[0066] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0067] Figure 1 This is a flowchart illustrating the addressing method for a grid-type static var generator in one embodiment;

[0068] Figure 2 For the above Figure 1 A flowchart illustrating step 102 in one embodiment;

[0069] Figure 3 For the above Figure 1 A flowchart illustrating step 103 in one embodiment;

[0070] Figure 4 This is a structural block diagram of the addressing device for a grid-type static var generator in one embodiment;

[0071] Figure 5This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0073] It should be noted that the terms "first," "second," etc., used in this application may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more.

[0074] In one embodiment, such as Figure 1 As shown, a method for selecting the location of a grid-type static var generator (SVR) is provided. This embodiment illustrates the method by applying it to a terminal. It is understood that this method can also be applied to a server, or to a system including both a terminal and a server, and can be implemented through the interaction between the terminal and the server. In this embodiment, the method includes steps 101 to 107.

[0075] Step 101: Obtain multiple sets of candidate schemes, each set of candidate schemes includes several location nodes.

[0076] The location of the selected node can be determined by a vote of the owners. Specifically, multiple addresses that are suitable for installing the grid-type static var generator can be sent to the owners for voting. The nodes corresponding to the addresses with the most votes are then selected as the chosen nodes.

[0077] Alternatively, the location of the node can be determined not only by owner voting, but also by power grid staff based on an analysis of electricity demand in various regions.

[0078] After determining each site selection node, the site selection nodes can be grouped according to the geographical distance between them. Different site selection nodes that are nearby and reachable can be grouped into the same group as a set of candidate solutions.

[0079] Step 102: Calculate the total power supply capacity connected to each of the selected nodes, and obtain the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node.

[0080] The total power supply capacity typically refers to the maximum power or energy that a power system or device can stably and continuously provide. Statistics on the total power supply capacity connected to each selected node are used to analyze the power supply of each node, facilitating the selection of the optimal location for the best grid-type static var generator (SVM). Active power flow value, as understood, refers to the actual flow value of active power P in transmission lines or branches during steady-state operation of the power system. It describes the distribution and direction of electrical energy transmission from the power source (such as a power plant) to the load (such as a user).

[0081] In one embodiment, the preset index includes at least one of the following: the dynamic voltage recovery time of the location node, the dynamic voltage recovery amplitude of the location node, the short-circuit ratio level of the location node, the stable voltage deviation index of the location node, and the voltage harmonic index.

[0082] In one exemplary embodiment, the preset indicators include the stable voltage deviation indicator and the voltage harmonic indicator of the located node. Figure 2 As shown, step 102 includes steps 201 to 203. Wherein:

[0083] Step 201: Monitor the voltage deviation and total harmonic distortion of the power system at the selected node during normal operation.

[0084] Step 202: When the voltage deviation is greater than or equal to the preset second threshold, the value of the stable voltage deviation index of the corresponding address node is set to 0; otherwise, the value of the stable voltage deviation index of the corresponding address node is set to 1.

[0085] Preferably, the second threshold is, for example, 5%. It is understood that the voltage deviation represents the absolute value of the voltage deviation, for example, when the voltage deviation is less than or equal to -5% or greater than or equal to +5%, it means that the voltage deviation is greater than or equal to the preset second threshold.

[0086] Step 203: When the total harmonic distortion of the voltage is greater than or equal to the preset third threshold, the voltage harmonic index of the corresponding address node is set to 0; otherwise, the voltage harmonic index of the corresponding address node is set to 1.

[0087] Preferably, the third threshold can also be set to 5%.

[0088] According to one usage scenario of this embodiment: if the voltage deviation of a certain addressing node is greater than or equal to ±5% under normal operating conditions, the value of stable voltage deviation in the index is 0; if the voltage deviation of a certain addressing node is less than ±5% under normal operating conditions, the value of stable voltage deviation in the index is 1; if the total harmonic distortion of the voltage of a certain addressing node is greater than or equal to 5% under normal operating conditions, the value of voltage harmonic index is 0; if the total harmonic distortion of the voltage of a certain addressing node is less than 5% under normal operating conditions, the value of voltage harmonic index is 1.

[0089] Preferably, the preset indicator includes the dynamic voltage recovery time of the address node; the steps for obtaining the value of the preset indicator include:

[0090] Obtain the starting moment when the transient voltage amplitude reaches its lowest value during a power system fault. ;

[0091] Obtain the recovery time when the transient voltage amplitude returns to normal. ,in, This indicates the moment when the transient voltage amplitude recovers to 0.9 pu;

[0092] The difference between the recovery time and the start time is taken as the dynamic voltage recovery time.

[0093] Transient voltage is an important concept in power systems. It refers to the additional short-time voltage that appears in the secondary output voltage of a capacitive voltage transformer when the primary voltage suddenly changes. The amplitude reflects the magnitude of the transient voltage and is an important basis for judging its impact on the power system. Dynamic voltage recovery time represents the time required for the generator to recover and maintain the voltage within the stable regulation range from the instant of a sudden application or removal of a specified current.

[0094] In this embodiment, optionally, before the step of calculating the location base of the corresponding location node based on the value of the preset index and the weighting coefficient, the method further includes:

[0095] Furthermore, the formula for calculating the dynamic voltage recovery time can be expressed as follows: .

[0096] The dynamic voltage recovery time T is normalized using the following formula:

[0097]

[0098] in, Indicates the first The original recovery time of the dynamic voltage of each address node. Indicates the first The normalized dynamic voltage recovery time of each located node and They represent the first The maximum and minimum values ​​of the original recovery time of the dynamic voltage of the selected nodes of the grid-type static var generator.

[0099] The purpose of normalizing the dynamic voltage recovery time T using the above formula is to scale the dynamic voltage recovery time to a uniform numerical range, so that different index data are on the same scale. This facilitates subsequent comparisons and calculations and avoids excessive impact on the site selection results due to different scales of the dynamic voltage recovery time T.

[0100] In an exemplary embodiment, the preset index includes the dynamic voltage recovery amplitude of the addressing node, and the step of obtaining the value of the preset index includes:

[0101] The minimum value of transient voltage amplitude when a power system fault occurs can be measured in per-unit value. Reference;

[0102] The second amplitude of the transient voltage amplitude when it recovers to the normal state is obtained. The per-unit value of the second amplitude when the transient voltage amplitude recovers to the normal state is usually 0.9pu. Therefore, in this embodiment, the second amplitude when the transient voltage amplitude recovers to the normal state can be directly selected as 0.9pu.

[0103] The difference between the second amplitude and the lowest value is taken as the dynamic voltage recovery amplitude. Specifically, the dynamic voltage recovery amplitude The calculation formula can be expressed as: .

[0104] Preferably, in this embodiment, before the step of calculating the location base of the corresponding location node based on the value of the preset index and the weight coefficient, the method further includes:

[0105] The dynamic voltage recovery amplitude Normalization is performed using the following formula:

[0106]

[0107] in, Indicates the first The original recovered amplitude of the dynamic voltage of each address node. Indicates the first The normalized dynamic voltage recovery amplitude of each location node and They represent the first The maximum and minimum values ​​of the original recovery amplitude of the dynamic voltage at the address nodes of a grid-type static var generator.

[0108] Similarly, by normalizing the dynamic voltage recovery amplitude using the above formula, the dynamic voltage recovery amplitude can be scaled to a uniform numerical range, so that different index data are on the same scale. This will help avoid the unsuitable impact on the site selection results caused by the large scale of the dynamic voltage recovery amplitude during subsequent comparisons and calculations, thus affecting the accuracy of the site selection.

[0109] Preferably, the preset index also includes the short-circuit ratio level of the located node. The short-circuit ratio is a dimensionless value that reflects the system strength of a synchronous motor or a grid connection point. A larger short-circuit capacity indicates a more robust grid, making it less susceptible to changes in voltage and frequency during disturbances. A higher short-circuit ratio means a stronger grid relative to connected equipment and more stable system operation.

[0110] In this embodiment, the step of obtaining the value of the preset indicator includes:

[0111] Monitor the short-circuit ratio of the power system at this selected node during normal operation;

[0112] When the short-circuit ratio is less than or equal to a preset first threshold, the short-circuit ratio level index of the corresponding location node is set to 0. The first threshold can be set to 2.

[0113] When the short-circuit ratio is greater than the first threshold, the value of the short-circuit ratio level index of the corresponding location node is determined to be 1.

[0114] According to one use case of this embodiment: if the short-circuit ratio of a certain addressing node is less than or equal to 2 under normal operating conditions, the value of the short-circuit ratio level index is 0; if the short-circuit ratio of the node is greater than 2 under normal operating conditions, the value of the short-circuit ratio level index is 1.

[0115] In one exemplary embodiment, the objects to be screened can be... The installation nodes of the grid-type static var generator adopt dynamic voltage recovery time. Dynamic voltage recovery amplitude Stable voltage deviation Voltage harmonic index Short-circuit ratio level index Five site selection indicators are used to construct an evaluation index system to assess the site selection targets, ensuring that the equipment is installed at the target sites selected based on these indicators. After the grid-type static var generator is installed, it can ensure the stability of the power grid to meet the needs of power grid operation.

[0116] Step 103: Based on the maximum active power flow output and the total power supply capacity for the year, determine the weighting coefficients of each preset indicator in the corresponding location node.

[0117] It is understood that in this embodiment, each of the preset indicators is configured with a weight coefficient, which is used to calibrate the degree of influence of the corresponding indicator on the determination of the site selection target.

[0118] In one exemplary embodiment, the power flow is based on the maximum active power outflow of the year and the total power supply capacity, such as... Figure 3 As shown, step 103 includes steps 301 to 302. Wherein:

[0119] Step 301: If the annual maximum active power flow of the selected node is greater than or equal to half of the total power supply capacity, obtain the first set of weighting coefficients that correspond to each preset index.

[0120] Step 302: If the annual maximum active power flow of the selected node is less than half of the total power supply capacity, obtain a second set of weighting coefficients that are mapped to each preset index. The values ​​of the second set of weighting coefficients are different from those of the first set of weighting coefficients.

[0121] The first set of weighting coefficients and the second set of weighting coefficients can be preset based on the experience of power grid staff.

[0122] Step 104: Calculate the location base number of the corresponding location node according to the value of the preset index and the weight coefficient, and sort the location nodes in the same group of candidate schemes according to the size of the location base number.

[0123] Among them, the original recovery time of this dynamic voltage The original recovery amplitude of dynamic voltage After normalization, in step 104, the normalized value should be selected. and Participate in the calculation of the site selection baseline.

[0124] Preferably, regarding the dynamic voltage recovery time Dynamic voltage recovery amplitude Stable voltage deviation Voltage harmonic index Short-circuit ratio level index The first set of weighting coefficients are 0.15, 0.15, 0.2, 0.2, and 0.3, respectively; for dynamic voltage recovery time... Dynamic voltage recovery amplitude Stable voltage deviation Voltage harmonic index Short-circuit ratio level index The second set of weighting coefficients are 0.25, 0.2, 0.25, 0.2 and 0.1, respectively.

[0125] One implementation scenario according to this embodiment is as follows:

[0126] Definition of the first The total power capacity connected to each addressing node is Statistics The annual maximum active power flow of the grid-type static var generator installation nodes to be screened , The direction is the first Each address node points to the power grid. If Then the first Among the addressing nodes, the corresponding dynamic voltage recovery time Dynamic voltage recovery amplitude Stable voltage deviation Voltage harmonic index Short-circuit ratio level index The weights were assigned as 0.15, 0.15, 0.2, 0.2, and 0.3 respectively, representing the addressing base. The calculation formula is as follows: Formula (1):

[0127] (1)

[0128] 3) If Then the first Among the addressing nodes, the corresponding dynamic voltage recovery time Dynamic voltage recovery amplitude Stable voltage deviation Voltage harmonic index Short-circuit ratio level index The weights were assigned as 0.25, 0.2, 0.25, 0.2, and 0.1, respectively, representing the addressing base. The calculation formula is as follows: Formula (2):

[0129] (2)

[0130] The purpose of this step is to determine the relationship between the active power flow of the selected node and the total capacity of the connected power supply, assign index weights to the corresponding selected nodes, and calculate the node's selection base.

[0131] Step 105: Select several site selection nodes in descending order of the site selection base number as candidate nodes, and obtain the preset planned installation capacity corresponding to each candidate node.

[0132] According to one implementation scenario of this embodiment, for example: defining the first... The planned total installation capacity of the candidate grid-type static var generator installation schemes is: , No. The first installation candidate scheme The planned installation capacity of the selected nodes to be screened is: ; Calculate and obtain the first The number of location bases for all location nodes to be screened in the candidate installation schemes. and according to the site selection base The values ​​are sorted from largest to smallest, and the top k sorted nodes are selected as the candidate nodes.

[0133] It is understandable that the preset planned installation capacity for each candidate node is the installation capacity estimated and planned by the user based on the actual electricity demand of the area.

[0134] Step 106: When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes is equal to the total planned installation capacity, calculate the average location base of the corresponding candidate scheme.

[0135] The total planned installation capacity refers to the total planned installation capacity of grid-type static var generators to be installed at the selected site.

[0136] According to one implementation scenario of this embodiment, for example: defining the first... The planned total installation capacity of the candidate grid-type static var generator installation schemes is: ,like Where k represents the k-th addressing node, then calculate the sorted nodes from the 1st to the 1st. Average location base of each location node The calculation formula is as follows: Formula (3):

[0137] (3)

[0138] in, In the j-th candidate scheme, the first... The planned installation capacity of each site selection node, In the j-th candidate scheme, the first... The number of location bases for each location node.

[0139] Step 107: Select the candidate node from the candidate scheme with the highest average location base as the location target of the network-type static var generator.

[0140] Preferably, step 107 further includes:

[0141] The average location base of each group of candidate schemes is sorted in descending order;

[0142] The candidate node in the candidate scheme with the highest average location base is taken as the location target of the grid-type static var generator, which is the recommended optimal scheme for the installation of the grid-type static var generator.

[0143] This embodiment proposes a site selection method for grid-type static var generators (SVRs). This method comprehensively considers the characteristics of diverse urban loads and the technical requirements of grid-type SVRs in terms of voltage stability, power quality, and system support capabilities. It screens and defines multi-dimensional evaluation indicators. Secondly, it determines the weight of each evaluation indicator based on the power flow relationship between nodes. Finally, it constructs a site selection index to comprehensively evaluate and rank the candidate site selection schemes, thereby selecting the optimal installation location for the grid-type SVR with the best overall benefits. This overcomes the shortcomings of existing technologies, such as the single evaluation index and lack of systematic scheme ranking for grid-type SVRs. By constructing a comprehensive and scientific evaluation index system, this invention achieves optimal site selection for grid-type SVRs in urban diverse load scenarios, providing strong support for the safe, stable, economical, and efficient operation of urban power distribution networks.

[0144] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0145] Based on the same inventive concept, this application also provides a location device for a grid-type static var generator (SVR) to implement the location method for the aforementioned SVR. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations in one or more SVR embodiments provided below can be found in the limitations of the location method for the grid-type SVR described above, and will not be repeated here.

[0146] In one exemplary embodiment, such as Figure 4 As shown, a location selection device 100 for a grid-type static var generator is provided, comprising: a scheme acquisition module 11, a statistics module 12, a coefficient determination module 13, a sorting module 14, a capacity acquisition module 15, a calculation module 16, and a target determination module 17, wherein:

[0147] The scheme acquisition module 11 is used to acquire multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0148] The statistics module 12 is used to count the total power capacity connected to each of the selected nodes, and to obtain the annual maximum active power flow and the values ​​of multiple preset indicators for each of the selected nodes.

[0149] The coefficient determination module 13 is used to determine the weight coefficients of each preset index in the corresponding location node based on the maximum active power flow and the total capacity of the power supply in that year.

[0150] The sorting module 14 is used to calculate the location base number of the corresponding location node according to the value of the preset index and the weight coefficient, and sort the location nodes in the same group of candidate schemes according to the size of the location base number.

[0151] The capacity acquisition module 15 is used to select several site selection nodes as candidate nodes in descending order of the site selection base number, and obtain the preset planned installation capacity corresponding to each candidate node.

[0152] Calculation module 16 is used to calculate the average location base of the corresponding candidate scheme when the sum of the planned installation capacity of each candidate node in the same group of candidate schemes is equal to the total planned installation capacity;

[0153] The target determination module 17 is used to select the candidate node in the candidate scheme with the highest average location base as the location target of the network-type static var generator.

[0154] In an exemplary embodiment, the coefficient determination module 13, based on the maximum active power flow output of the year and the total power supply capacity, specifically includes:

[0155] The first coefficient acquisition unit is used to acquire a first set of weight coefficients that are mapped to each preset index when the annual maximum power outflow of the selected node is greater than or equal to half of the total power supply capacity.

[0156] The second coefficient acquisition unit is used to acquire a second set of weight coefficients that are mapped to each preset index when the annual maximum power outflow of the selected node is less than half of the total power supply capacity. The values ​​of the second set of weight coefficients are different from those of the first set of weight coefficients.

[0157] In an exemplary embodiment, the preset indicator includes the dynamic voltage recovery time of the address node, and the statistics module 12 further includes:

[0158] The start time acquisition unit is used to acquire the start time when the transient voltage amplitude reaches its lowest value when a fault occurs in the power system.

[0159] The recovery time acquisition unit is used to acquire the recovery time when the transient voltage amplitude recovers to the normal state;

[0160] The dynamic voltage recovery time determination unit is used to determine the difference between the recovery time and the start time as the dynamic voltage recovery time.

[0161] In an exemplary embodiment, the preset index includes the dynamic voltage recovery amplitude of the address node, and the statistics module 12 further includes:

[0162] The first monitoring unit is used to monitor the minimum value of transient voltage amplitude when a power system fault occurs.

[0163] An amplitude acquisition unit is used to acquire the second amplitude when the transient voltage amplitude recovers to the normal state.

[0164] The dynamic voltage recovery amplitude determination unit is used to take the difference between the second amplitude and the lowest value as the dynamic voltage recovery amplitude.

[0165] In an exemplary embodiment, the preset index includes the short-circuit ratio level index of the sited node, and the statistics module 12 further includes:

[0166] The second monitoring unit is used to monitor the short-circuit ratio of the power system at the selected node during normal operation.

[0167] The first determining unit is used to determine the value of the short-circuit ratio level index of the corresponding address node to 0 when the short-circuit ratio is less than or equal to a preset first threshold.

[0168] The second determining unit is used to determine the value of the short-circuit ratio level index of the corresponding address node as 1 when the short-circuit ratio is greater than the first threshold.

[0169] Preferably, the preset indicators include the stable voltage deviation indicator and the voltage harmonic indicator of the site selection node, and the statistical module 12 further includes:

[0170] The third monitoring unit is used to monitor the voltage deviation and total harmonic distortion of the power system during normal operation of the selected node.

[0171] The third value determination unit is used to determine the value of the stable voltage deviation index of the corresponding address node as 0 when the voltage deviation is greater than or equal to the preset second threshold, and otherwise determine the value of the stable voltage deviation index of the corresponding address node as 1.

[0172] The fourth value determination unit is used to determine the value of the voltage harmonic index of the corresponding address node as 0 when the total harmonic distortion of the voltage is greater than or equal to the preset third threshold; otherwise, it determines the value of the voltage harmonic index of the corresponding address node as 1.

[0173] This invention proposes a site selection device for grid-type static var generators (SVRs), aiming to overcome the shortcomings of existing technologies, such as the single evaluation index for site selection of grid-type SVRs, the strong subjectivity in weight determination, and the lack of systematic scheme ranking. By constructing a comprehensive and scientific evaluation index system, the device can achieve the optimal site selection for grid-type SVRs in urban multi-load scenarios, providing strong support for the safe, stable, economical, and efficient operation of urban power distribution networks.

[0174] Each module in the addressing device of the aforementioned grid-type static var generator can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0175] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 5As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When executed by the processor, the computer program implements an addressing method for a network-type static var generator. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0176] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0177] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0178] Obtain multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0179] The total power supply capacity connected to each of the selected nodes is calculated, and the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node are obtained.

[0180] Based on the maximum active power flow output and the total capacity of the power source in that year, determine the weight coefficients of each preset indicator in the corresponding location node.

[0181] The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number.

[0182] Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained.

[0183] When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes equals the total planned installation capacity, calculate the average location base of the corresponding candidate schemes;

[0184] The candidate node in the candidate scheme with the highest average location base is used as the location target of the grid-type static var generator.

[0185] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0186] Obtain multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0187] The total power supply capacity connected to each of the selected nodes is calculated, and the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node are obtained.

[0188] Based on the maximum active power flow output and the total capacity of the power source in that year, determine the weight coefficients of each preset indicator in the corresponding location node.

[0189] The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number.

[0190] Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained.

[0191] When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes equals the total planned installation capacity, calculate the average location base of the corresponding candidate schemes;

[0192] The candidate node in the candidate scheme with the highest average location base is used as the location target of the grid-type static var generator.

[0193] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0194] Obtain multiple sets of candidate schemes, each set of candidate schemes including several location nodes;

[0195] The total power supply capacity connected to each of the selected nodes is calculated, and the annual maximum active power flow and the values ​​of multiple preset indicators for each selected node are obtained.

[0196] Based on the maximum active power flow output and the total capacity of the power source in that year, determine the weight coefficients of each preset indicator in the corresponding location node.

[0197] The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number.

[0198] Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained.

[0199] When the sum of the planned installation capacity of each candidate node in the same group of candidate schemes equals the total planned installation capacity, calculate the average location base of the corresponding candidate schemes;

[0200] The candidate node in the candidate scheme with the highest average location base is used as the location target of the grid-type static var generator.

[0201] The location method, apparatus, computer equipment, computer-readable storage medium, and computer program product for grid-type static var generators proposed in this embodiment obtain the annual maximum active power flow and multiple preset index values ​​for each location node by statistically analyzing the total power supply capacity connected to each location node. Based on the annual maximum active power flow and the total power supply capacity, the weight coefficients of each preset index in the corresponding location node are determined, so that the weight coefficients of each index used to select the location target of the grid-type static var generator simultaneously consider the maximum active power flow and the total power supply capacity. When finally determining the location target, this application first selects the location base from each group of candidate schemes. If there are a large number of candidate nodes, then based on the average location base in the same group of candidate schemes, the candidate node in the candidate scheme with the highest average location base is selected as the location target for the grid-type static var generator. This allows multiple indicators that affect the grid operation requirements to be considered simultaneously when selecting the location of the grid-type static var generator, and the influence of each indicator on the location result is adjusted according to the weight coefficient. By selecting the location node in both the dimension of each group of candidate schemes and the dimension of multiple groups of candidate schemes, the final selected location target can ensure the grid stability after the grid-type static var generator is connected to meet the grid operation requirements.

[0202] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0203] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0204] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0205] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for selecting the location of a grid-type static var generator, characterized in that, include: Obtain multiple sets of candidate schemes, each set of candidate schemes including several address nodes; The total power supply capacity connected to each of the aforementioned addressing nodes is statistically analyzed, and the annual maximum active power flow output of each of the aforementioned addressing nodes and the values ​​of multiple preset indicators are obtained. Based on the maximum annual active power flow and the total power supply capacity, determine the weight coefficients of each preset index in the corresponding location node; The location base number of the corresponding location node is calculated based on the value of the preset index and the weight coefficient, and the location nodes in the same group of candidate schemes are sorted according to the size of the location base number. Several site selection nodes selected in descending order of the site selection base number are taken as candidate nodes, and the preset planned installation capacity corresponding to each candidate node is obtained. When the sum of the planned installation capacities of all candidate nodes in the same group of candidate schemes equals the total planned installation capacity, the average location base of the corresponding candidate schemes is calculated. The candidate node in the candidate scheme with the highest average location base is used as the location target of the network-type static var generator.

2. The method according to claim 1, characterized in that, The step of determining the weighting coefficients of each preset index in the corresponding location node based on the maximum annual active power flow and the total power supply capacity includes: When the annual maximum active power flow of the selected node is greater than or equal to half of the total power supply capacity, a first set of weighting coefficients mapped to each of the preset indicators is obtained. When the annual maximum active power flow of the selected node is less than half of the total power supply capacity, a second set of weighting coefficients is obtained that maps to each of the preset indicators. The values ​​of the second set of weighting coefficients are different from those of the first set of weighting coefficients.

3. The method according to claim 1, characterized in that, The preset indicators include the dynamic voltage recovery time of the addressing node; The steps for obtaining the value of the preset indicator include: Obtain the starting moment when the transient voltage amplitude reaches its lowest value during a power system fault; Obtain the recovery time when the transient voltage amplitude returns to normal. The difference between the recovery time and the start time is taken as the dynamic voltage recovery time.

4. The method according to claim 1, characterized in that, The preset index includes the dynamic voltage recovery amplitude of the address node, and the steps for obtaining the value of the preset index include: The minimum value of transient voltage amplitude when a power system fault occurs; Obtain the second amplitude value when the transient voltage amplitude recovers to the normal state; The difference between the second amplitude and the lowest value is taken as the dynamic voltage recovery amplitude.

5. The method according to claim 1, characterized in that, The preset index includes the short-circuit ratio level index of the site selection node, and the steps for obtaining the value of the preset index include: Monitor the short-circuit ratio of the power system at the selected node during normal operation; When the short-circuit ratio is less than or equal to a preset first threshold, the value of the short-circuit ratio level index of the corresponding address node is determined to be 0; When the short-circuit ratio is greater than the first threshold, the value of the short-circuit ratio level index of the corresponding address node is determined to be 1.

6. The method according to any one of claims 1 to 5, characterized in that, The preset indicators include the stable voltage deviation indicator and voltage harmonic indicator of the site selection node; The steps for obtaining the value of the preset indicator include: Monitor the voltage deviation and total harmonic distortion of the power system during normal operation of the selected node; When the voltage deviation is greater than or equal to the preset second threshold, the value of the stable voltage deviation index of the corresponding address node is set to 0; otherwise, the value of the stable voltage deviation index of the corresponding address node is set to 1. When the total harmonic distortion of voltage is greater than or equal to a preset third threshold, the voltage harmonic index of the corresponding address node is set to 0; otherwise, the voltage harmonic index of the corresponding address node is set to 1.

7. A location selection device for a grid-type static var generator, characterized in that, include: The scheme acquisition module is used to acquire multiple sets of candidate schemes, each set of candidate schemes including several location nodes; The statistics module is used to count the total power capacity connected to each of the addressing nodes, and to obtain the annual maximum active power flow output of each of the addressing nodes and the values ​​of multiple preset indicators. The coefficient determination module is used to determine the weight coefficients of each preset index in the corresponding location node based on the annual maximum active power flow and the total power supply capacity. The sorting module is used to calculate the location base number of the corresponding location node according to the value of the preset index and the weight coefficient, and sort the location nodes in the same group of candidate schemes according to the size of the location base number. The capacity acquisition module is used to select several site selection nodes as candidate nodes in descending order of the site selection base number, and obtain the preset planned installation capacity corresponding to each candidate node. The calculation module is used to calculate the average location base of the corresponding candidate scheme when the sum of the planned installation capacities of the candidate nodes in the same group of candidate schemes is equal to the total planned installation capacity. The target determination module is used to select the candidate node in the candidate scheme with the highest average location base as the location target of the network-type static var generator.

8. 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 steps of the addressing method for the grid-type static var generator as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the addressing method for the grid-type static var generator as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the addressing method for the grid-type static var generator according to any one of claims 1 to 6.

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