Capacitor grid connection point determination method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a capacitor grid connection point determination method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a plurality of reactive load values of each node of the transformer area line and an impedance value between two adjacent nodes; determining a calculated load value of each node according to the plurality of reactive load values of each node; and determining a capacitor grid connection point according to the impedance value between the two adjacent nodes and the calculated load value. The technical scheme provided by the embodiment of the invention not only considers the reactive load value and the impedance value of each node of the transformer area line, but also considers the calculation difficulty of selecting the grid-connected point, can reasonably determine the grid-connected point of the transformer area line, improves the power quality of the transformer area, reduces the power loss of the transformer area, is simple in process, is low in calculation difficulty, and is suitable for popularization and application. And the project progress is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of newly-built capacitor grid connection points for substation lines, and in particular to a method, device, electronic equipment and storage medium for determining a capacitor grid connection point. Background Art

[0002] With the construction of new power systems, the proportion of grid-connected adjustable source and load storage equipment has gradually increased, and most of these devices are connected to the grid at the substation level, which has led to a gradual increase in the demand for reactive power compensation resources at the substation level. At the same time, due to the strong volatility of adjustable source and load storage equipment itself, it is crucial to choose a suitable capacitor grid connection point.

[0003] For some substations that need to add reactive power compensation grid-connected points on the line, current flow calculation is mostly used to determine the corresponding nodes. However, this method has high requirements on calculation conditions and cannot quickly determine the appropriate nodes, which is not conducive to application in actual projects.

[0004] The existing methods for determining capacitor grid connection points have high requirements and slow speed, which has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0005] The present invention provides a method, device, electronic device and storage medium for determining a capacitor grid connection point, so as to solve the problems of high requirements and slow speed of the existing method for determining a capacitor grid connection point, thereby reducing the difficulty of calculation and improving the project progress.

[0006] According to one aspect of the present invention, a method for determining a capacitor grid connection point is provided, which is applied to a transformer line, and the method comprises:

[0007] Obtain multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes;

[0008] Determining a calculated load value of each node according to a plurality of reactive load values ​​of each node;

[0009] The capacitor grid connection point is determined according to the impedance value between the two adjacent nodes and the calculated load value.

[0010] Optionally, obtaining multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes includes:

[0011] Obtain a topology diagram of the substation line, and number each node from 1 to n in order from near to far from the low-voltage side of the substation transformer; where n is a positive integer greater than or equal to 2;

[0012] Obtain the reactive load value at m different sampling times within a preset time of each node of the substation line; wherein m is a positive integer greater than or equal to 2;

[0013] Obtain the impedance value between two adjacent nodes of the substation line.

[0014] Optionally, determining the calculated load value of each node according to the reactive load value of each node includes:

[0015] Get the weighted value of each node at different sampling times;

[0016] Determine the calculated load value of each node according to the multiple reactive load values ​​of each node and the weighted value

[0017] Optionally, the calculation formula for the weighted value of each node at different sampling times is:

[0018]

[0019] Where k(t) is the weighted value of different sampling times, t is the current sampling time, m is the total sampling time, and m≥t;

[0020] The calculation formula of the calculation load value of each node is:

[0021]

[0022] Where i is the i-th node of the substation line, Q i is the computational load value of the i-th node, Q it is the reactive load value sampled at the i-th node at time t, i≤n.

[0023] Optionally, determining a capacitor grid connection point according to the impedance value between the two adjacent nodes and the calculated load value includes:

[0024] Determine the calculated distance between each node according to the impedance value between the two adjacent nodes;

[0025] Determining the calculation deviation between the nodes according to the calculation distance between the nodes and the calculation load value of the nodes;

[0026] Summing the calculated deviations between the nodes to determine the total calculated deviation of each node;

[0027] The capacitor grid connection point is determined according to the total calculated deviation of each node.

[0028] Optionally, the calculation formula for calculating the distance between the nodes is:

[0029]

[0030] Where i is the i-th node of the station line, j is the j-th node of the station line, R ijis the resistance value between the i-th node and the j-th node, X ij is the reactance value between the i-th node and the j-th node, Z ij The calculated distance between the i-th node and the j-th node, n is the total number of nodes in the area, j≤n, i≤n;

[0031] The calculation formula for the calculation deviation between the nodes is:

[0032]

[0033] Among them, Q j is the computational load value of the jth node, A ij is the calculated deviation between the i-th node and the j-th node;

[0034] The calculation formula for the total calculation deviation of each node is:

[0035]

[0036] Among them, A i is the total calculated deviation of the ith node.

[0037] Optionally, determining the capacitor grid connection point according to the total calculated deviation of each node includes:

[0038] The node with the smallest total calculated deviation is selected as the capacitor grid connection point.

[0039] According to another aspect of the present invention, a device for determining a capacitor grid connection point is provided, which is applied to a transformer line, and the device comprises:

[0040] A data acquisition module, used to acquire multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes;

[0041] A data calculation module, used to determine a calculated load value of each node according to a plurality of reactive load values ​​of each node;

[0042] The grid connection point determination module is used to determine the capacitor grid connection point according to the impedance value between the two adjacent nodes and the calculated load value.

[0043] According to another aspect of the present invention, there is provided an electronic device, comprising:

[0044] one or more processors;

[0045] a storage device for storing one or more programs,

[0046] When the one or more programs are executed by the one or more processors, the one or more processors implement any of the above-mentioned methods for determining a capacitor grid connection point of the present invention.

[0047] According to another aspect of the present invention, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, any of the above-mentioned methods for determining a capacitor grid connection point of the present invention is implemented.

[0048] The technical solution of the embodiment of the present invention first obtains multiple reactive load values ​​of each node of the substation line and the impedance value between two adjacent nodes, and then calculates the calculated load value of each node according to the reactive load value of each node. Finally, the capacitor grid connection point is determined according to the impedance value of the adjacent node and the calculated load value of each node. The embodiment of the present invention not only takes into account the reactive load value and impedance value of each node of the substation line, but also takes into account the difficulty of selecting the grid connection point, reduces the difficulty of interest rate calculation, can reasonably determine the grid connection point of the substation line, ensures the continuity and stability of the power supply of the substation, improves the reliability of power supply, can be applied to different substation lines, improves the power quality of the substation, reduces the loss of power in the substation, and the method for determining the grid connection point is simple, the calculation speed is fast, and the project progress is improved.

[0049] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 A flowchart of a method for determining a capacitor grid connection point provided by an embodiment of the present invention;

[0052] Figure 2 A line topology diagram of a certain area provided by an embodiment of the present invention;

[0053] Figure 3 A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention;

[0054] Figure 4 A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention;

[0055] Figure 5 A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention;

[0056] Figure 6A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention;

[0057] Figure 7 A schematic diagram of the structure of a capacitor grid connection point determination device provided by an embodiment of the present invention;

[0058] Figure 8 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0060] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0061] Figure 1 A flowchart of a method for determining a capacitor grid connection point provided by an embodiment of the present invention, Figure 2 A topological diagram of a certain area line provided in an embodiment of the present invention. The embodiment of the present invention is applicable to the situation where a new capacitor grid connection point is built in an area line. The method can be executed by a capacitor grid connection point determination device, which can be implemented in the form of hardware and / or software.

[0062] like Figure 1 As shown, the method for determining a capacitor grid connection point provided by an embodiment of the present invention includes:

[0063] S110, obtaining multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes.

[0064] Specifically, in the substation lines, as the proportion of grid-connected adjustable source and load storage equipment is gradually increasing, a large number of reasonable grid connection points need to be selected. When selecting a suitable grid connection point, due to the presence of components such as resistance, inductance and reactance in the substation lines, the current in the substation lines will be hindered, and there will be a phase difference between the voltage and the current, resulting in a part of the electric energy not doing work in the load. Therefore, it is necessary to first obtain the reactive load value of each node on the substation line at multiple times and the impedance value between two adjacent nodes. Among them, the reactive load value refers to the part of the load that does not do work in the substation line, and the multiple reactive load values ​​are the reactive load values ​​of the node at multiple times. The impedance value refers to the hindering effect of components such as resistance, capacitance and inductance on the current between two adjacent nodes in the substation line.

[0065] For example, Table (1) is Figure 2 The reactive load value of each node in a certain area at a certain time is shown in Table (2). Figure 2 The impedance value between two adjacent nodes in a certain area is shown.

[0066] Table (1)

[0067] Node Number Reactive load at a certain moment (kVar) 1 50 2 64 3 24 4 69 5 80 6 19 7 35 8 71

[0068] Table (2)

[0069]

[0070]

[0071] It should be noted that the above is only an example of Figure 2 The reactive load value of each node in a certain area at a certain moment and the impedance value between two adjacent nodes are shown. The above table (1) and table (2) can be prepared according to the results of previous tests. This embodiment does not specifically limit the specific data in table (1) and table (2).

[0072] S120. Determine a calculated load value of each node according to multiple reactive load values ​​of each node.

[0073] Specifically, after obtaining multiple reactive load values ​​of each node on the substation line, the multiple reactive load values ​​of each node are summed according to different weights to determine the calculated load value of each node on the substation line. After obtaining the reactive load values ​​of one of the nodes in the substation line at multiple times, different weights are assigned to the reactive load values ​​at each time, and the reactive load values ​​at different times are multiplied by the corresponding weights, and then summed to determine the calculated load value of the node. The calculated load values ​​of other nodes on the substation line are also determined according to the above steps.

[0074] S130, determining a capacitor grid connection point according to an impedance value between two adjacent nodes and a calculated load value.

[0075] Specifically, the calculated load value of each node can reflect the amount of work done on the load when the current flows through each node in the substation line, and the impedance value between two adjacent nodes represents the ability of the two nodes to hinder the current. After obtaining the calculated load value of each node on the line and the impedance value between two adjacent nodes, the grid connection point of the newly built capacitor in the substation line can be determined by the calculated load value of each node and the impedance value between two adjacent nodes. Not only the reactive load value and impedance value of each node are taken into account, but also the calculation difficulty can be reduced and the efficiency of determining the newly built grid connection point of the substation line can be improved.

[0076] The method for determining the grid connection point of a capacitor provided in an embodiment of the present invention first obtains multiple reactive load values ​​of each node of the substation line and the impedance value between two adjacent nodes, and then calculates the calculated load value of each node according to the reactive load value of each node. Finally, the grid connection point of the capacitor is determined according to the impedance value of the adjacent node and the calculated load value of each node. The embodiment of the present invention not only takes into account the reactive load value and impedance value of each node of the substation line, but also takes into account the difficulty of selecting the grid connection point, reduces the difficulty of calculation, can reasonably determine the grid connection point of the substation line, ensures the continuity and stability of the power supply of the substation, improves the reliability of power supply, can be applied to different substation lines, improves the power quality of the substation, reduces the loss of power in the substation, and the method for determining the grid connection point is simple, the calculation speed is fast, and the project progress is improved.

[0077] Optional, Figure 3 A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention. Figure 3 , the method for determining a capacitor grid connection point provided by an embodiment of the present invention includes:

[0078] S210, obtaining a substation line topology diagram, and numbering each node from 1 to n in order from near to far from the low-voltage side of the substation transformer.

[0079] Wherein, n is a positive integer greater than or equal to 2.

[0080] Specifically, refer to Figure 2 Before obtaining the reactive load value of each node of the substation line and the impedance value between two adjacent nodes, it is necessary to first obtain the topology of the substation line, and number the nodes in the topology of the substation line in the order from near to far from the low-voltage side of the substation distribution transformer. That is, the node closest to the substation distribution transformer is numbered 1, and the node farthest from the distribution transformer is numbered n. Among them, n is a positive integer greater than or equal to 2.

[0081] S220, obtaining reactive load values ​​at m different sampling times within a preset time at each node of the substation line.

[0082] Here, m is a positive integer greater than or equal to 2.

[0083] Specifically, after obtaining the substation line topology map and numbering all the nodes on the substation line. After obtaining the reactive load values ​​of each node on the substation line at multiple times, the reactive load values ​​of each node on the substation line at m different sampling times within a preset time can be obtained. Among them, the preset time can be set according to actual needs, and the embodiment of the present invention does not make specific limitations on this. Exemplarily, the preset time can be the past 30 days. After numbering the nodes on the substation line, the reactive load values ​​of each node on the line at any m sampling times in the past 30 days can be obtained, where m is a positive integer greater than or equal to 2.

[0084] S230: Obtain the impedance value between two adjacent nodes of the substation line.

[0085] S240. Determine a calculated load value of each node according to multiple reactive load values ​​of each node.

[0086] S250, determining a capacitor grid connection point according to an impedance value between two adjacent nodes and a calculated load value.

[0087] Optional, Figure 4 A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention. Figure 4 , the method for determining a capacitor grid connection point provided by an embodiment of the present invention includes:

[0088] S310, obtaining a substation line topology diagram, and numbering each node from 1 to n in order from near to far from the low-voltage side of the substation transformer.

[0089] S320, obtaining reactive load values ​​at m different sampling times within a preset time at each node of the substation line.

[0090] S330: Obtain the impedance value between two adjacent nodes of the substation line.

[0091] S340: Obtain weighted values ​​of each node at different sampling times.

[0092] Specifically, after obtaining the reactive load values ​​of m different sampling times of each node in the substation line, the reactive load values ​​at different sampling times have different importance. Therefore, it is also necessary to obtain weighted values ​​at different sampling times, and the different influences of the reactive load values ​​at different sampling times are reflected by the corresponding weighted values, so as to ensure that the results are more accurate and reasonable.

[0093] Among them, the weighted value of each node at different sampling times is calculated using the following formula:

[0094]

[0095] Wherein, k(t) is the weighted value of different sampling times, t is the current sampling time, m is the total sampling time, and m≥t.

[0096] S350. Determine the calculated load value of each node according to multiple reactive load values ​​and weighted values ​​of each node.

[0097] Specifically, after calculating the weighted values ​​of each node on the substation line at different sampling times, the calculated load value of each node can be determined by the reactive load value of each node and the corresponding weighted value. The calculated load value of each node can be determined by multiplying the reactive load value of each node at different sampling times by its corresponding weighted value, and then summing these products. The embodiment of the present invention obtains the reactive load value of each node at different sampling times of the substation line and the weighted value of the reactive load value at different sampling times, and then calculates the calculated load value of each node, taking into account the importance of the reactive load value at different sampling times, ensuring the accuracy of the calculation result, and ensuring the rationality of the capacitor grid connection point.

[0098] The calculation load value of each node is calculated using the following formula:

[0099]

[0100] Where i is the i-th node of the substation line, Q i is the computational load value of the i-th node, Q it is the reactive load value sampled at the i-th node at time t, i≤n.

[0101] S360, determining a capacitor grid connection point according to an impedance value between two adjacent nodes and a calculated load value.

[0102] Optional, Figure 5 A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention. Figure 5 , the method for determining a capacitor grid connection point provided by an embodiment of the present invention includes:

[0103] S410, obtaining multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes.

[0104] S420. Determine a calculated load value of each node according to multiple reactive load values ​​of each node.

[0105] S430: Determine the calculated distance between each node according to the impedance value between two adjacent nodes.

[0106] Specifically, after obtaining the impedance value of two adjacent nodes of the substation line, it is also necessary to calculate the calculated distance between different nodes on the substation line, that is, the impedance value between different nodes. Because the impedance value between two adjacent nodes can only represent the obstruction to the current between the two adjacent nodes, and in determining the capacitor grid connection point, it is necessary to determine the calculated distance between different nodes. When calculating the calculated distance between different nodes, the impedance values ​​between each adjacent node between the two non-adjacent nodes can be added, and then the calculated distance between the two non-adjacent nodes can be determined by calculations such as square root.

[0107] The distance between nodes is calculated using the following formula:

[0108]

[0109] Where i is the i-th node of the station line, j is the j-th node of the station line, R ij is the resistance value between the i-th node and the j-th node, X ij is the reactance value between the i-th node and the j-th node, Z ij The calculated distance between the i-th node and the j-th node, n is the total number of nodes in the substation line, j≤n, i≤n.

[0110] For example, if node 1 is connected to node 2, node 2 is connected to node 3, node 3 is connected to node 4, node 2 is connected to node 5, node 3 is connected to node 6, and the impedance value between node 1 and node 2 is R 12 +jX 12 =1+j2, the impedance between node 2 and node 3 is R 23 +jX 23 =2+j3, the impedance between node 3 and node 4 is R 34 +jX 34 =3+j4, the impedance between node 2 and node 5 is R 25 +jX 25 =4+j5, the impedance between node 3 and node 6 is R 36 +jX 36 =5+j6, then the calculated distance between node 1 and node 6 is:

[0111]

[0112] S440: Determine the calculation deviation between each node according to the calculation distance between each node and the calculation load value of each node.

[0113] Specifically, after determining the calculated distance between the nodes of the substation line, it is only possible to represent the obstruction of the current between the nodes on the substation line. It is also necessary to determine the calculated deviation between the nodes through the calculated distance between the nodes and the calculated load value of each node. The calculated deviation between one node and the other node can be determined by dividing the calculated distance between two nodes on the substation line by the calculated load value of one of the nodes.

[0114] The calculation deviation between nodes is calculated using the following formula:

[0115]

[0116] Among them, Q j is the calculation load value of the jth node, A ij is the calculated deviation between the i-th node and the j-th node.

[0117] For example, if the calculated distance between node 1 and node 6 is 13.6, and the calculated load value of node 1 is 50, then the calculated deviation between node 1 and node 6 is:

[0118]

[0119] S450: sum the calculation deviations between the nodes to determine the total calculation deviation of each node.

[0120] Specifically, the calculated deviation between each node can only represent the deviation between two nodes on the substation line, and the total calculated deviation of each node needs to be determined. The total calculated deviation of the substation line node can be obtained by summing the calculated deviation between the node and all nodes on the substation line.

[0121] The total calculated deviation of each node is calculated using the following formula:

[0122]

[0123] Among them, A i is the total calculated deviation of the ith node.

[0124] For example, Table (3) is Figure 2 The total calculated deviation of each node in a certain area is shown.

[0125] Table (3)

[0126] Node Number Total calculated deviation 1 0.0405 2 0.0266 3 0.016 4 0.0303 5 0.0323 6 0.0165 7 0.0256 8 0.0383

[0127] It should be noted that the above is only an example of Figure 2The total calculated deviation of each node in a certain area is shown. The above table (3) can be prepared according to the results of previous tests. This embodiment does not specifically limit the specific data in table (3).

[0128] S460: Determine the capacitor grid connection point according to the total calculated deviation of each node.

[0129] Specifically, after calculating the total calculation deviation of each node of the substation line, the total calculation deviation of each node can be used to determine the grid connection point of the substation line capacitor. The node with the smallest total calculation deviation is selected as the grid connection point of the new capacitor of the substation line. The embodiment of the present invention calculates the calculation distance between each node of the substation line, and then calculates the calculation deviation between each node and the total calculation deviation of each node, and finally determines the grid connection point of the new capacitor of the substation line, reasonably determines the grid connection point, takes into account the reactive load value and impedance value of each node, and has low calculation difficulty and high efficiency.

[0130] Optional, Figure 6 A flowchart of another method for determining a capacitor grid connection point provided by an embodiment of the present invention. Figure 6 , the method for determining a capacitor grid connection point provided by an embodiment of the present invention includes:

[0131] S510, obtaining multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes.

[0132] S520. Determine a calculated load value of each node according to multiple reactive load values ​​of each node.

[0133] S530: Determine the calculated distance between each node according to the impedance value between two adjacent nodes.

[0134] S540: Determine the calculation deviation between each node according to the calculation distance between each node and the calculation load value of each node.

[0135] S550: Sum the calculation deviations between the nodes to determine the total calculation deviation of each node.

[0136] S560: Select the node with the smallest total calculated deviation as the capacitor grid connection point.

[0137] Specifically, after obtaining the total calculation deviation of each node of the substation line, the total calculation deviation of each node can be used to determine the grid connection point of the substation line capacitor. The node with the smallest total calculation deviation is selected as the grid connection point of the new capacitor of the substation line. Not only the reactive load value and impedance value of each node are taken into account, but also the stability of the substation line is taken into account, which reduces the difficulty of calculation and improves the project progress.

[0138] The method for determining the capacitor grid connection point provided in the embodiment of the present invention obtains the reactive load value of each node of the substation line and the impedance value of two adjacent nodes, and then calculates the calculation deviation between the nodes of the substation line and the total calculation deviation of each node, and finally selects the node with the smallest total calculation deviation as the new capacitor grid connection point of the substation line. Not only the reactive load value and impedance value of each node are taken into account, but also the stability of the substation line is taken into account. The calculation difficulty is low, the grid connection point determination method is reasonable, the project progress is improved, and the operation and maintenance cost is reduced.

[0139] The embodiment of the present invention also provides a device for determining a capacitor grid connection point. Figure 7 The following is a schematic diagram of a capacitor grid connection point determination device provided by an embodiment of the present invention. Figure 7 As shown, the capacitor grid connection point determination device 100 includes:

[0140] The data acquisition module 110 is used to obtain multiple reactive load values ​​of each node of the substation line and the impedance value between two adjacent nodes.

[0141] The data calculation module 120 is used to determine the calculated load value of each node according to multiple reactive load values ​​of each node.

[0142] The grid connection point determination module 130 is used to determine the capacitor grid connection point according to the impedance value between two adjacent nodes and the calculated load value.

[0143] The embodiment of the present invention obtains multiple reactive load values ​​of each node of the substation line and the impedance value between adjacent nodes through the data acquisition module, calculates the calculated load value of each node through the data calculation module, and finally determines the capacitor grid connection point through the grid connection point determination module. Not only the reactive load value and impedance value of each node are taken into account, but also the stability of the substation line is taken into account, the reliability of power supply is improved, the continuity and stability of power supply are guaranteed, the power quality of the substation is improved, the grid connection point selection method is reasonable, the calculation difficulty is low, and the project progress is improved.

[0144] The capacitor grid connection point determination device provided in the embodiment of the present invention can execute the capacitor grid connection point determination method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0145] Figure 8A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0146] like Figure 8 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0147] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0148] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a capacitor grid connection point determination method.

[0149] In some embodiments, the capacitor grid connection point determination method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the capacitor grid connection point determination method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the capacitor grid connection point determination method in any other appropriate manner (e.g., by means of firmware).

[0150] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0151] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0152] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0153] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0154] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0155] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0156] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0157] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a capacitor grid connection point, characterized in that: Applied to the area line, the method includes: Obtain multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes; Determining a calculated load value of each node according to a plurality of reactive load values ​​of each node; The capacitor grid connection point is determined according to the impedance value between the two adjacent nodes and the calculated load value.

2. The determination method according to claim 1, characterized in that: Acquiring multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes, including: Obtain a topology diagram of the substation line, and number each node from 1 to n in order from near to far from the low-voltage side of the substation transformer; where n is a positive integer greater than or equal to 2; Obtain the reactive load value at m different sampling times within a preset time of each node of the substation line; wherein m is a positive integer greater than or equal to 2; Obtain the impedance value between two adjacent nodes of the substation line.

3. The determination method according to claim 2, characterized in that: Determining the calculated load value of each node according to the multiple reactive load values ​​of each node includes: Get the weighted value of each node at different sampling times; The calculated load value of each node is determined according to the multiple reactive load values ​​of each node and the weighted value.

4. The determination method according to claim 3, characterized in that: The calculation formula of the weighted value of each node at different sampling times is: Where k(t) is the weighted value of different sampling times, t is the current sampling time, m is the total sampling time, and m≥t; The calculation formula of the calculation load value of each node is: Where i is the i-th node of the substation line, Q i is the computational load value of the i-th node, Q it is the reactive load value sampled at the i-th node at time t, i≤n.

5. The determination method according to claim 1, characterized in that: Determining a capacitor grid connection point according to the impedance value between the two adjacent nodes and the calculated load value includes: Determine the calculated distance between each node according to the impedance value between the two adjacent nodes; Determining the calculation deviation between the nodes according to the calculation distance between the nodes and the calculation load value of the nodes; Summing the calculated deviations between the nodes to determine the total calculated deviation of each node; The capacitor grid connection point is determined according to the total calculated deviation of each node.

6. The determination method according to claim 5, characterized in that: The calculation formula for the distance between the nodes is: Where i is the i-th node of the station line, j is the j-th node of the station line, R ij is the resistance value between the i-th node and the j-th node, X ij is the reactance value between the i-th node and the j-th node, Z ij The calculated distance between the i-th node and the j-th node, n is the total number of nodes in the area, j≤n, i≤n; The calculation formula for the calculation deviation between the nodes is: Among them, Q j is the calculation load value of the jth node, A ij is the calculated deviation between the i-th node and the j-th node; The calculation formula for the total calculation deviation of each node is: Among them, A i is the total calculated deviation of the ith node.

7. The determination method according to claim 5, characterized in that: Determining the capacitor grid connection point according to the total calculated deviation of each node includes: The node with the smallest total calculated deviation is selected as the capacitor grid connection point.

8. A device for determining a capacitor grid connection point, characterized in that: Applicable to the area lines, including: A data acquisition module, used to acquire multiple reactive load values ​​of each node of the substation line and impedance values ​​between two adjacent nodes; A data calculation module, used to determine a calculated load value of each node according to a plurality of reactive load values ​​of each node; The grid connection point determination module is used to determine the capacitor grid connection point according to the impedance value between the two adjacent nodes and the calculated load value.

9. An electronic device, characterized in that: The electronic device comprises: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the capacitor grid connection point determination method as described in any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for determining a capacitor grid connection point as described in any one of claims 1 to 7 is implemented.

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