Transformer area charging pile capacity expansion system and method based on topology automatic identification

Abstract

The invention relates to the technical field of electric power, and discloses a transformer area charging pile capacity expansion system and method based on topology automatic identification. A charging control device; wherein the low-voltage topology identification equipment is connected with a plurality of low-voltage electricity meter nodes through transmission lines, and the low-voltage topology identification equipment generates a topological relation network comprising the plurality of low-voltage electricity meter nodes; wherein the charging control equipment is connected with a plurality of charging piles arranged under the corresponding low-voltage ammeter nodes through communication lines, and the charging control equipment generates charging pile control instructions transmitted to the plurality of charging piles according to the topological relation network so as to control the charging piles to execute charging actions. According to the method, the charging pile control instruction is generated by obtaining the topological relation network of the transformer area, and the number of the charging piles in the transformer area is expanded by reasonably controlling the corresponding charging piles to execute the charging action under the limitation of transformer area total load or transmission line load balance and the like.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a charging pile expansion system and method based on automatic topology identification. Background Art

[0002] In the related technical field, the substations of the power system network usually have complicated power connection relationships due to the lack of standardization in installation, management and maintenance. At the same time, during power maintenance, due to non-standard power maintenance methods, the transmission lines where user loads are mounted are switched arbitrarily, resulting in unbalanced loads on different power transmission lines in the substation.

[0003] On this basis, since the topological relationship network of each low-voltage meter node in the substation is unclear, for the sake of power safety, it will be impossible to provide a sufficient number of charging piles for the user side due to the limitations of the total load of the substation or the load balancing of the transmission line. Therefore, how to expand the capacity of charging piles for substations with complex power connection relationships is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The main purpose of the present invention is to provide a system and method for expanding the capacity of charging piles in a substation area based on automatic topology identification, aiming to solve the technical problem that the number of charging piles on the user side is limited due to the complex power connection relationship in the substation area.

[0005] To achieve the above object, the present invention provides a charging pile expansion system based on automatic topology identification, the system having:

[0006] Low voltage topology identification equipment;

[0007] Charging control equipment;

[0008] Wherein, the low-voltage topology identification device is connected to a plurality of low-voltage electricity meter nodes through a transmission line, and the low-voltage topology identification device generates a topological relationship network including the plurality of low-voltage electricity meter nodes;

[0009] Among them, the charging control device is connected to several charging piles arranged under the corresponding low-voltage meter nodes through a communication line, and the charging control device generates a charging pile control instruction transmitted to the several charging piles according to the topological relationship network to control the charging piles to perform charging actions.

[0010] Optionally, each low voltage meter node is configured with:

[0011] Measurement and control terminal;

[0012] Wherein, the measurement and control terminal transmits a high-frequency signal or a high-frequency characteristic signal to the transmission line;

[0013] The low-voltage topology identification device generates a topological relationship network including each low-voltage electric meter node according to the received high-frequency signal or high-frequency characteristic signal.

[0014] Optionally, when the measurement and control terminal transmits a high-frequency signal to the transmission line;

[0015] The measurement and control terminal senses and acquires the high-frequency signal transmitted on the transmission line, and performs calibration processing on the acquired high-frequency signal;

[0016] The low-voltage topology identification device extracts effective high-frequency signals corresponding to low-voltage meter nodes from high-frequency signals on the transmission line that have been calibrated, and generates a topological relationship network including each low-voltage meter node based on the effective high-frequency signals.

[0017] Optionally, when the measurement and control terminal transmits a high-frequency characteristic signal to the transmission line;

[0018] The measurement and control terminal senses and obtains the high-frequency characteristic current transmitted on the transmission line, and extracts the high-frequency characteristic signal from the high-frequency characteristic current;

[0019] The low-voltage topology identification device generates a topological relationship network including each low-voltage electric meter node according to the high-frequency characteristic signal transmitted on the transmission line.

[0020] Optionally, the charging control device has:

[0021] Charging pile control instruction generation module;

[0022] Charging pile control instruction distribution module;

[0023] Wherein, the charging pile control instruction generation module generates a charging pile control instruction set according to the topological relationship network acquired by the charging control device;

[0024] The charging pile control instruction distribution module sends each charging pile control instruction in the generated charging pile control instruction set to the corresponding charging pile, so as to control each charging pile to perform an independent charging action.

[0025] Optionally, the charging pile control instruction set includes a plurality of charging pile control instructions for controlling the charging piles to perform charging actions in a time-sharing manner.

[0026] Optionally, the charging pile control instruction generation module has:

[0027] Transmission line load extraction unit;

[0028] Charging pile control instruction generating unit;

[0029] Wherein, the transmission line load extraction unit extracts the load quantization value of each transmission line according to the topological relationship network;

[0030] Among them, the charging pile control instruction generation unit generates a charging pile control instruction set according to the load quantization value of each transmission line. When the charging pile control instructions in the charging pile control instruction set control the charging pile to perform charging actions in time-sharing, the load quantization value of each transmission line is controlled within a preset difference range.

[0031] Optionally, the charging pile control instruction generation module has:

[0032] Area load extraction unit;

[0033] Charging pile control instruction generating unit;

[0034] Wherein, the transmission line load extraction unit extracts the load quantization value of each substation according to the topological relationship network;

[0035] Among them, the charging pile control instruction generation unit generates a charging pile control instruction set according to the load quantization value of each area. When the charging pile control instructions in the charging pile control instruction set control the charging pile to perform charging actions in time-sharing, the total load quantization value of each area is controlled to be within the corresponding threshold range.

[0036] Optionally, the charging pile control instruction generation module has:

[0037] User charging reservation unit;

[0038] Wherein, the user charging reservation unit obtains the user's required charging pile usage time period;

[0039] Wherein, the charging pile control instruction generation unit generates a charging pile control instruction set according to the charging pile demand use period and the load quantization value of each transmission line or the charging pile demand use period and the load quantization value of each station area;

[0040] Among them, the charging pile control instructions in the charging pile control instruction set control the charging pile to execute in time-sharing during the corresponding charging pile demand usage period, control the load quantization value of each transmission line within a preset difference range or control the total load quantization value of each station area within a corresponding threshold range.

[0041] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a method for expanding the capacity of charging piles in a substation based on automatic topology identification, the method comprising:

[0042] The low voltage topology identification device generates a topological relationship network including a plurality of low voltage meter nodes;

[0043] The charging control device generates a charging pile control instruction transmitted to a plurality of charging piles according to the topological relationship network, so as to control the charging piles to perform charging actions.

[0044] The present invention proposes a system and method for expanding the capacity of charging piles in a substation based on automatic topology identification, the system comprising: a low-voltage topology identification device; a charging control device; wherein the low-voltage topology identification device is connected to a number of low-voltage meter nodes through a transmission line, and the low-voltage topology identification device generates a topological relationship network including a number of low-voltage meter nodes; wherein the charging control device is connected to a number of charging piles arranged under the corresponding low-voltage meter nodes through a communication line, and the charging control device generates a charging pile control instruction transmitted to a number of charging piles according to the topological relationship network to control the charging piles to perform charging actions. The present invention obtains a topological relationship network including a number of low-voltage meter nodes in the substation, thereby generating a charging pile control instruction to control the charging piles arranged under the corresponding low-voltage meter nodes, thereby achieving expansion of the number of charging piles in the substation by reasonably controlling the corresponding charging piles to perform charging actions under the restrictions of the total load of the substation or the load balancing of the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of an embodiment of a charging pile expansion system for a substation based on automatic topology identification in an embodiment of the present invention;

[0046] Figure 2 The present invention is a flowchart of an embodiment of a method for expanding the capacity of charging piles in a substation based on automatic topology identification in an embodiment of the present invention.

[0047] Reference numerals:

[0048] 10- low voltage topology identification module; 20- charging control equipment; 30- low voltage meter node; 40- charging pile. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0050] The embodiment of the present invention provides a charging pile expansion system based on topology automatic identification. Figure 1 , Figure 1 It is a schematic diagram of an embodiment of the charging pile expansion system for a substation based on automatic topology identification of the present invention.

[0051] In this embodiment, a charging pile 40 expansion system for a substation based on automatic topology recognition is proposed. The charging pile 40 expansion system for a substation based on automatic topology recognition includes a low-voltage topology recognition device 10 and a charging control device 20 .

[0052] It should be noted that the low-voltage topology identification device 10 is connected to a number of low-voltage meter nodes 30 through a transmission line, and the low-voltage topology identification device 10 generates a topological relationship network including a number of low-voltage meter nodes 30; the charging control device 20 is connected to a number of charging piles 40 arranged under the corresponding low-voltage meter nodes 30 through a communication line, and the charging control device 20 generates a charging pile control instruction transmitted to the number of charging piles 40 according to the topological relationship network, so as to control the charging piles 40 to perform charging actions.

[0053] In this embodiment, the low-voltage topology identification device 10 is connected to a plurality of low-voltage electricity meter nodes 30 through a transmission line. The low-voltage topology identification device 10 first obtains a topology identification high-frequency signal corresponding to each low-voltage electricity meter node 30 transmitted on the transmission line, and then uses the topology identification high-frequency signal to establish a topological relationship network including the plurality of low-voltage electricity meter nodes 30.

[0054] After that, the charging control device 20 analyzes the power connection relationship of all the low-voltage meter nodes 30 in the substation according to the established topological relationship network, so as to understand the load conditions of different transmission lines and the total load conditions in the substation, and then generates a charging pile control instruction, and sends the charging pile control instruction to the corresponding charging pile 40 through the communication line to control the charging pile 40 to perform the charging action, so as to expand the number of charging piles 40 in the substation by reasonably controlling the corresponding charging pile 40 to perform the charging action under the constraints of the total load of the substation or the load balancing of the transmission line.

[0055] In a preferred embodiment, each low-voltage electric meter node 30 is configured with a measurement and control terminal.

[0056] It should be noted that the measurement and control terminal transmits a high-frequency signal or a high-frequency characteristic signal to the transmission line; the low-voltage topology identification device 10 generates a topological relationship network including each low-voltage meter node 30 according to the received high-frequency signal or high-frequency characteristic signal.

[0057] Each low-voltage meter node 30 in the substation is equipped with a measurement and control terminal, which is used to transmit a high-frequency signal or a high-frequency characteristic signal to the transmission line. The high-frequency signal or high-frequency characteristic signal is a signal generated by the measurement and control terminal according to the high-frequency signal or high-frequency characteristic current transmitted on the transmission line to the corresponding low-voltage meter node 30. After that, the low-voltage topology identification device 10 generates a topological relationship network including each low-voltage meter node 30 according to the received high-frequency signal or high-frequency characteristic signal.

[0058] In one embodiment, when the measurement and control terminal transmits a high-frequency signal to the transmission line, the measurement and control terminal senses and obtains the high-frequency signal transmitted on the transmission line, and calibrates the obtained high-frequency signal; the low-voltage topology identification device 10 extracts the effective high-frequency signal corresponding to the low-voltage meter node 30 from the high-frequency signal on the transmission line after calibration, and generates a topological relationship network including each low-voltage meter node 30 according to the effective high-frequency signal.

[0059] Among them, in this embodiment, the measurement and control terminal has a high-frequency signal sensing module, and the high-frequency signal sensing module senses and acquires the high-frequency signal transmitted on the transmission line. The high-frequency signal sensing module also monitors the high-frequency signal through a configured monitoring device, and generates a calibration signal when it detects that the high-frequency signal matches the identification information of the target low-voltage meter node 30; the obtained high-frequency signal is calibrated and processed by the configured control unit according to the calibration signal generated by the monitoring device. In this way, through the calibration of the high-frequency signal, when the low-voltage topology identification device 10 receives the high-frequency signal, it can determine which part is the effective waveform data transmitted by the corresponding low-voltage meter node 30 for the establishment of this topology network structure according to the calibration.

[0060] Furthermore, the high-frequency signal sensing module may adopt a high-frequency signal sensing component on the transmission line, and the high-frequency signal sensing component on the transmission line includes: a first signal sensing module that outputs a first electrical signal in response to the high-frequency signal on the transmission line and a second signal sensing module that outputs a second electrical signal in response to the high-frequency signal on the transmission line.

[0061] The first electrical signal and the second electrical signal are sensing signals of different impedance loops formed at different positions on the transmission line sensed by the first signal sensing module and the second signal sensing module. When high-frequency signals in different directions on the transmission line flow through different impedance loops, the first electrical signal and the second electrical signal will be different, so that when the first electrical signal and the second electrical signal are obtained, the transmission direction of the high-frequency signal on the transmission line can be determined.

[0062] Therefore, when the high-frequency signal sensing module transmits the sensed high-frequency signal (i.e., the first electrical signal and the second electrical signal) to the high-frequency characteristic signal extraction module of the low-voltage topology identification device 10, the high-frequency characteristic signal extraction module can determine the transmission direction of the high-frequency signal on the transmission line based on the high-frequency signal, thereby establishing a topological relationship network including all low-voltage meter nodes 30.

[0063] In some embodiments, in order to make the first electrical signal and the second electrical signal different when the high-frequency signals in different directions on the transmission line flow through different impedance loops, the high-frequency signal sensing module also needs to set a high-frequency signal impedance transformation component, and use the high-frequency signal impedance transformation component to change the high-frequency signal transmission impedance when the high-frequency signal is transmitted on the transmission line, so as to achieve the purpose of changing the first perception signal and the second perception signal, and then judging the transmission direction of the high-frequency signal on the transmission line according to the changed first perception signal and the second perception signal.

[0064] In practical applications, the high-frequency signal impedance conversion component can use a capacitor, and the high-frequency signal transmission impedance input through the electrode plate of the capacitor can be used to change the impedance of the loop formed by the transmission line for high-frequency signal transmission.

[0065] It should be noted that this embodiment does not limit the high-frequency signal impedance conversion component to a specific device, and those skilled in the art can select any capacitor-like structure, impedance conversion device or impedance conversion module as needed to achieve the purpose of changing the high-frequency signal transmission impedance.

[0066] In another embodiment, when the measurement and control terminal transmits a high-frequency characteristic signal to the transmission line, the measurement and control terminal senses and obtains the high-frequency characteristic current transmitted on the transmission line, and extracts the high-frequency characteristic signal from the high-frequency characteristic current; the low-voltage topology identification device 10 generates a topological relationship network including each low-voltage meter node 30 according to the high-frequency characteristic signal transmitted on the transmission line.

[0067] In this embodiment, a characteristic current generator is connected to the transmission line, and when the characteristic current generator receives a characteristic current generation instruction, it generates and transmits the generated high-frequency characteristic current to the transmission line. The measurement and control terminal senses and obtains the high-frequency characteristic current transmitted on the transmission line through the configured characteristic current receiver; and extracts the high-frequency characteristic signal in the high-frequency characteristic current sensed and obtained by the characteristic current receiver through the configured high-frequency characteristic signal extraction module.

[0068] It should be noted that the high-frequency characteristic signal extraction module can use a high-frequency signal sensing module to sense and obtain the high-frequency characteristic signal transmitted on the transmission line. The specific implementation of the high-frequency signal sensing module has been described in detail in the above embodiments and will not be repeated here.

[0069] In a preferred embodiment, the charging control device 20 comprises: a charging pile control instruction generating module and a charging pile control instruction distributing module.

[0070] It should be noted that the charging pile control instruction generation module generates a charging pile control instruction set based on the topological relationship network obtained by the charging control device 20; the charging pile control instruction distribution module sends each charging pile control instruction in the generated charging pile control instruction set to the corresponding charging pile 40 to control each charging pile 40 to perform an independent charging action.

[0071] Among them, after the low-voltage topology identification device 10 obtains the topological relationship network of the substation including each low-voltage meter node 30, the charging control device 20 can generate a charging pile control instruction according to the load of each transmission line in the current substation and the total load of the substation.

[0072] Specifically, the charging pile control instruction generation module generates a charging control instruction set based on data such as the load of each transmission line and the total load of the substation extracted from the topological relationship network. The charging pile control instruction distribution module sends each charging pile control instruction in the charging control instruction set to the corresponding charging pile 40, so that the charging pile 40 meets the safety requirements of the load of each transmission line and the total load of the substation when performing the charging action according to the corresponding charging pile control instruction. While meeting the power safety, the charging action control of the charging pile 40 is used to expand the number of charging piles 40, so that the user side can install and use as many charging piles 40 as possible.

[0073] In a preferred embodiment, the charging pile control instruction set includes a plurality of charging pile control instructions for controlling the charging pile 40 to perform charging actions in a time-sharing manner.

[0074] In this embodiment, the charging action of the charging pile 40 is controlled to expand the number of charging piles 40. Time-sharing charging control can be performed on several charging piles 40 in the substation. The charging piles 40 can be used to perform time-sharing charging actions to coordinate the load balancing of different transmission lines and relieve the pressure of the total load of the substation.

[0075] In one embodiment, the charging pile control instruction generation module comprises: a transmission line load extraction unit and a charging pile control instruction generation unit.

[0076] It should be noted that the transmission line load extraction unit extracts the load quantization value of each transmission line according to the topological relationship network; the charging pile control instruction generation unit generates a charging pile control instruction set according to the load quantization value of each transmission line. When the charging pile control instructions in the charging pile control instruction set control the charging pile to perform charging actions in 40 time-sharing, the load quantization value of each transmission line is controlled to be within a preset difference range.

[0077] Among them, the charging pile control instruction generation module obtains the load quantization value of each transmission line, and then controls the charging actions performed by the charging piles 40 on different transmission lines in different time periods according to the load quantization value. In this way, the load quantization value of each transmission line is controlled within a preset difference range while ensuring that as many charging piles 40 as possible are available, thereby ensuring load balance of the transmission lines.

[0078] In this embodiment, the load quantization value may be the number of electrical devices mounted on the transmission line or the total power consumption of the transmission line. The preset difference range is a numerical range that can ensure that the transmission line meets the load balancing power safety, and can be manually set based on experience.

[0079] In another embodiment, the charging pile control instruction generation module comprises: a station load extraction unit and a charging pile control instruction generation unit.

[0080] It should be noted that the transmission line load extraction unit extracts the load quantization value of each substation according to the topological relationship network; the charging pile control instruction generation unit generates a charging pile control instruction set according to the load quantization value of each substation, and the charging pile control instructions in the charging pile control instruction set control the charging pile 40 to perform charging actions in a time-sharing manner, and control the total load quantization value of each substation to be within the corresponding threshold range.

[0081] Among them, the charging pile control instruction generation module obtains the load quantization value in the substation, and then controls the charging actions of the charging piles 40 on different transmission lines in different time periods according to the load quantization value, so as to control the total load quantization value of each substation within the corresponding threshold range while ensuring that as many charging piles 40 as possible are available.

[0082] In this embodiment, the load quantification value may be the number of all electrical devices or the total power consumption within the area. The threshold range is a numerical range that can ensure that each area meets the total load quantification value power safety, and can be manually set based on experience.

[0083] In yet another embodiment, the charging pile control instruction generating module comprises: a user charging reservation unit.

[0084] It should be noted that the user charging reservation unit obtains the user's charging pile demand usage period; the charging pile control instruction generation unit generates a charging pile control instruction set according to the charging pile demand usage period and the load quantization value of each transmission line or the charging pile demand usage period and the load quantization value of each substation; the charging pile control instructions in the charging pile control instruction set control the charging pile 40 to control the load quantization value of each transmission line within a preset difference range or control the total load quantization value of each substation within a corresponding threshold range when executing in time-sharing manner during the corresponding charging pile demand usage period.

[0085] Among them, the charging pile control instruction generation module can also further optimize the user experience when the user uses the charging pile 40 in time-sharing mode according to the required use period of the charging pile 40 input by the user through the user charging reservation unit. Specifically, the charging control device can interact with the APP on the smartphone to provide the user with optional time-sharing use periods of the charging pile 40. The user can select the use period of the charging pile 40 according to his own needs, so as to achieve time-sharing charging of multiple charging piles 40 to coordinate the pressure of the transmission line and the load of the station area.

[0086] For example, if user A chooses to charge through charging pile A1 between 1:00 and 3:00 in the morning, then in order to reduce the load pressure, user B can only choose charging pile B1 to charge during the period other than 1:00 to 3:00. In this way, time-sharing charging control among multiple users is realized, which can meet the charging needs of more users while ensuring the balance of the total load of the area or the transmission line load.

[0087] The embodiment of the present invention also provides a method for expanding the charging pile capacity of a station area based on automatic topology identification, referring to Figure 2 , Figure 2 It is a schematic diagram of an embodiment of a method for expanding charging piles in a substation area based on automatic topology identification of the present invention.

[0088] The method for expanding the charging pile capacity of a substation based on automatic topology identification is used in the system for expanding the charging pile capacity of a substation based on automatic topology identification described in the above embodiment. The method comprises the following steps:

[0089] S1: The low voltage topology identification device generates a topological relationship network including a plurality of low voltage meter nodes;

[0090] S2: The charging control device generates a charging pile control instruction to be transmitted to a plurality of charging piles according to the topological relationship network, so as to control the charging piles to perform charging actions.

[0091] It should be noted that the specific implementation methods of the method for expanding the capacity of charging piles in an area based on automatic topology identification in the present application are basically the same as the above-mentioned embodiments of the system for expanding the capacity of charging piles in an area based on automatic topology identification, and will not be repeated here.

[0092] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inside", "outside", "inner side", "outer side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, "inside" refers to an internal or enclosed area or space. "Periphery" refers to the area surrounding a specific component or a specific area.

[0093] In the description of the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0094] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0096] In the description of the embodiments of the present invention, it is to be understood that "-" and "~" represent the range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0097] In the description of the embodiments of the present invention, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0098] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A charging pile expansion system based on automatic topology identification, characterized in that: The system has: Low voltage topology identification equipment; Charging control equipment; Wherein, the low-voltage topology identification device is connected to a plurality of low-voltage electricity meter nodes through a transmission line, and the low-voltage topology identification device generates a topological relationship network including the plurality of low-voltage electricity meter nodes; Among them, the charging control device is connected to several charging piles arranged under the corresponding low-voltage meter nodes through a communication line, and the charging control device generates a charging pile control instruction transmitted to the several charging piles according to the topological relationship network to control the charging piles to perform charging actions.

2. The charging pile expansion system based on automatic topology identification according to claim 1 is characterized in that: Each low voltage meter node is configured with: Measurement and control terminal; Wherein, the measurement and control terminal transmits a high-frequency signal or a high-frequency characteristic signal to the transmission line; The low-voltage topology identification device generates a topological relationship network including each low-voltage electric meter node according to the received high-frequency signal or high-frequency characteristic signal.

3. The charging pile expansion system based on automatic topology identification according to claim 2 is characterized in that: When the measurement and control terminal transmits a high-frequency signal to the transmission line; The measurement and control terminal senses and acquires the high-frequency signal transmitted on the transmission line, and performs calibration processing on the acquired high-frequency signal; The low-voltage topology identification device extracts effective high-frequency signals corresponding to low-voltage meter nodes from high-frequency signals on the transmission line that have been calibrated, and generates a topological relationship network including each low-voltage meter node based on the effective high-frequency signals.

4. The charging pile expansion system based on automatic topology identification according to claim 2 is characterized in that: When the measurement and control terminal transmits a high-frequency characteristic signal to the transmission line; The measurement and control terminal senses and obtains the high-frequency characteristic current transmitted on the transmission line, and extracts the high-frequency characteristic signal from the high-frequency characteristic current; The low-voltage topology identification device generates a topological relationship network including each low-voltage electric meter node according to the high-frequency characteristic signal transmitted on the transmission line.

5. The charging pile expansion system based on automatic topology identification according to claim 1 is characterized in that: The charging control device has: Charging pile control instruction generation module; Charging pile control instruction distribution module; Wherein, the charging pile control instruction generation module generates a charging pile control instruction set according to the topological relationship network acquired by the charging control device; The charging pile control instruction distribution module sends each charging pile control instruction in the generated charging pile control instruction set to the corresponding charging pile, so as to control each charging pile to perform an independent charging action.

6. The charging pile expansion system based on automatic topology identification according to claim 5 is characterized in that: The charging pile control instruction set includes a plurality of charging pile control instructions for controlling the charging piles to perform charging actions in a time-sharing manner.

7. The charging pile expansion system based on automatic topology identification according to claim 6 is characterized in that: The charging pile control instruction generation module has: Transmission line load extraction unit; Charging pile control instruction generating unit; Wherein, the transmission line load extraction unit extracts the load quantization value of each transmission line according to the topological relationship network; Among them, the charging pile control instruction generation unit generates a charging pile control instruction set according to the load quantization value of each transmission line. When the charging pile control instructions in the charging pile control instruction set control the charging pile to perform charging actions in time-sharing, the load quantization value of each transmission line is controlled within a preset difference range.

8. The charging pile expansion system based on automatic topology identification according to claim 6 is characterized in that: The charging pile control instruction generation module has: Area load extraction unit; Charging pile control instruction generating unit; Wherein, the transmission line load extraction unit extracts the load quantization value of each substation according to the topological relationship network; Among them, the charging pile control instruction generation unit generates a charging pile control instruction set according to the load quantization value of each area. When the charging pile control instructions in the charging pile control instruction set control the charging pile to perform charging actions in time-sharing, the total load quantization value of each area is controlled to be within the corresponding threshold range.

9. The charging pile expansion system based on automatic topology identification according to claim 7 or 8, characterized in that: The charging pile control instruction generation module has: User charging reservation unit; Wherein, the user charging reservation unit obtains the user's required charging pile usage time period; Wherein, the charging pile control instruction generation unit generates a charging pile control instruction set according to the charging pile demand use period and the load quantization value of each transmission line or the charging pile demand use period and the load quantization value of each station area; Among them, the charging pile control instructions in the charging pile control instruction set control the charging pile to execute in time-sharing during the corresponding charging pile demand usage period, control the load quantization value of each transmission line within a preset difference range or control the total load quantization value of each station area within a corresponding threshold range.

10. A method for expanding charging piles in a substation area based on automatic topology identification, characterized in that: The method comprises: The low voltage topology identification device generates a topological relationship network including a plurality of low voltage meter nodes; The charging control device generates a charging pile control instruction transmitted to a plurality of charging piles according to the topological relationship network, so as to control the charging piles to perform charging actions.

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