Chaos topology-based direct current power distribution method and system for charging pile

Abstract

A chaos topology-based direct current power distribution method for a charging pile. The method comprises: establishing a charging pile power initial chaos topology distribution network on the basis of a user requirement and a matrix topology network; extending the dimension of the charging pile power initial chaos topology distribution network to a high-dimensional curved surface by means of a Gaussian kernel function, so as to obtain a charging pile power chaos topology distribution network having a plurality of charging nodes; and then controlling the closing and opening of a contactor switch unit on the basis of the charging pile power chaos topology distribution network, the required power of each charging gun, and a power distribution strategy, so as to control the flow direction of power outputted by a power conversion unit.

Description

A DC power distribution method and system for charging piles based on chaotic topology Technical Field

[0001] This invention relates to the field of charging pile technology, and in particular to a DC power distribution method and system for charging piles based on chaotic topology. Background Technology

[0002] After charging begins, the charging pile controller requests charging data from all vehicles waiting to be charged. The charging pile dynamically calculates the power demand of each vehicle based on its own power unit output capacity and adjusts the real-time output power of each vehicle accordingly. During charging, the charging demand of each vehicle is still calculated in real time to avoid redundant startup and allocation of power units. Using an excellent power routing topology can improve the utilization efficiency of power modules, reduce equipment production costs, shorten vehicle charging time, and enhance the user charging experience. Current mainstream power routing topologies include linear allocation topology, ring allocation topology, star-ring allocation topology, and matrix allocation topology. However, all of these suffer from low power utilization or dead zones in supercharging power allocation, and cannot flexibly customize individual node degrees of freedom.

[0003] Therefore, a new solution is needed. Technical issues

[0004] The main objective of this invention is to address the problems of low power utilization, dead zones in supercharging power allocation, and inability to flexibly customize node degrees of freedom in existing power routing topologies by providing a DC power allocation method for charging piles based on chaotic topology. Technical solutions

[0005] To achieve the above objectives, this invention provides a DC power allocation method for charging piles based on chaotic topology, comprising the following steps:

[0006] Based on user requirements, an initial chaotic topology allocation network for charging pile power is established using a matrix topology network; and

[0007] By using a Gaussian kernel function, the dimension of the initial chaotic topology allocation network of the charging pile power is extended to a high-dimensional surface, resulting in a chaotic topology allocation network of the charging pile power with multiple charging nodes. Each charging node is equipped with a charging gun and a power conversion unit connected to the charging gun. Contactor switch units are set between nodes with connection relationships.

[0008] Based on the chaotic topology of the charging pile power allocation network, the power demand of each charging gun and the power allocation strategy, the closing and opening of the contactor switch unit is controlled to control the power orientation of the power conversion unit output.

[0009] In the DC power allocation method for charging piles based on chaotic topology provided by this invention, the step of establishing a two-dimensional initial charging pile power topology network based on a matrix topology network according to user requirements includes:

[0010] Based on the user's input of the number and arrangement requirements of charging guns, a charging pile power matrix topology allocation network is established. The charging pile power matrix topology allocation network includes multiple planar matrix nodes. Each node is equipped with a charging gun and a power conversion unit connected to the charging gun. A contactor switch unit is set between adjacent matrix nodes.

[0011] The user-selected planar matrix nodes are edited with degrees of freedom. Contactor switch units are set between the user-selected planar matrix nodes and one or more of the remaining planar matrix nodes to establish a connection relationship, forming the two-dimensional initial charging pile power topology network.

[0012] In the DC power allocation method for charging piles based on chaotic topology provided by this invention, the step of extending the dimension of the initial chaotic topology allocation network of the charging pile power to a high-dimensional surface through a Gaussian kernel function to obtain a chaotic topology allocation network of the charging pile power with multiple charging nodes includes:

[0013] The Gaussian kernel function is used to expand the dimensionality of the initial chaotic topology allocation network for the charging pile power.

[0014] Based on the maximum degrees of freedom of the charging nodes, the initial chaotic topology allocation network of the charging pile power after dimensional expansion is subjected to dimensionality reduction processing to obtain the chaotic topology allocation network of the charging pile power.

[0015] In the DC power allocation method for charging piles based on chaotic topology provided by this invention, the step of controlling the power guidance of the power conversion unit output by controlling the closing and opening of the contactor switch unit based on the chaotic topology allocation network of the charging pile power, the power demand of each charging gun, and the power allocation strategy includes:

[0016] After one of the multiple charging guns is started, the contactor switch unit directly connected to the started charging gun is disconnected, and the power of the power conversion unit connected to the started charging gun is input to the started charging gun.

[0017] When the power of the power conversion unit connected to the activated charging gun is less than the power required by the activated charging gun, the power chaotic topology allocation network of the charging pile searches for an available power conversion unit among the power conversion units connected to the charging node where the activated charging gun is located. When an available power conversion unit is found, the contactor switch unit between the charging node where the available power conversion unit is located and the charging node where the activated charging gun is located is closed, and the power of the available power conversion unit is input to the activated charging gun.

[0018] The DC power allocation method for charging piles based on chaotic topology provided by this invention further includes: when the sum of the power of the power conversion unit connected to the activated charging gun and the power of all idle power conversion units is less than the required power of the activated charging gun, searching in the chaotic topology power allocation network of the charging pile for a second type of power conversion unit among the power conversion units connected to the charging node where the already occupied power conversion unit is located. The second type of power conversion unit is a power conversion unit that has been occupied by other charging guns and has a lower utilization rate than that occupied by the activated charging gun. When the second type of power conversion unit is found, closing the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the activated charging gun is located, and inputting the power of the second type of power conversion unit to the activated charging gun.

[0019] According to another aspect of the present invention, a DC power distribution system for charging piles based on chaotic topology is also provided, comprising:

[0020] The initial chaotic topology allocation network establishment module is used to establish an initial chaotic topology allocation network for charging pile power based on a matrix topology network, according to user requirements; and

[0021] The dimension expansion module is used to expand the dimension of the initial chaotic topology allocation network of the charging pile power to a high-dimensional surface through a Gaussian kernel function, so as to obtain a chaotic topology allocation network of the charging pile power with multiple charging nodes. Each charging node is equipped with a charging gun and a power conversion unit connected to the charging gun. A contactor switch unit is set between nodes with connection relationship.

[0022] The control module is used to control the power orientation of the power conversion unit by controlling the closing and opening of the contactor switch unit based on the chaotic topology distribution network of the charging pile power, the power demand of each charging gun and the power distribution strategy.

[0023] According to another aspect of the present invention, a charging pile is also provided, the charging pile including the chaotic topology-based DC power distribution system for the charging pile as described above.

[0024] According to another aspect of the present invention, a DC power distribution device for charging piles based on chaotic topology is also provided, comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, it implements the steps of the DC power distribution method for charging piles based on chaotic topology as described above. Beneficial effects

[0025] The DC power allocation method for charging piles based on chaotic topology provided by this invention has the following beneficial effects: This invention proposes a DC power allocation method for charging piles based on chaotic topology. According to user needs, an initial chaotic topology allocation network for charging pile power is established based on a matrix topology network. By using a Gaussian kernel function, the dimension of the initial chaotic topology allocation network for charging pile power is extended to a high-dimensional surface, resulting in a chaotic topology allocation network for charging pile power with multiple charging nodes. Then, based on the chaotic topology allocation network for charging pile power, the required power of each charging gun, and the power allocation strategy, the closing and opening of the contactor switch unit is controlled to control the power orientation of the power conversion unit output. Thus, efficient flexible power scheduling can be achieved, and the degrees of freedom of all nodes in the power topology can be arbitrarily customized to ensure that each node can achieve the efficiency expected by the user. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0027] Figure 1 shows a flowchart of a DC power allocation method for charging piles based on chaotic topology provided in an embodiment of the present invention;

[0028] Figure 2 shows the charging pile power matrix topology allocation network established according to user needs;

[0029] Figure 3 shows the expanded charging pile power matrix topology allocation network. Embodiments of the present invention

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Typical embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] Figure 1 shows a flowchart of a DC power allocation method for charging piles based on chaotic topology according to an embodiment of the present invention. As shown in Figure 1, the DC power allocation method for charging piles based on chaotic topology provided by the present invention includes the following steps:

[0033] Step S1: Based on user requirements, establish an initial chaotic topology allocation network for charging pile power based on a matrix topology network;

[0034] Specifically, in one embodiment of the present invention, firstly, according to user requirements, the number and encoding of charging guns to be set in the system are confirmed, and these charging gun nodes are distributed on the nodes of a matrix grid for initialization, as shown in Figure 2, which is a matrix grid established according to user requirements, containing 16 charging guns. Then, in this matrix topology network of charging guns, the user selects the charging gun node with higher degrees of freedom from all the nodes mentioned above. Degrees of freedom refer to the number of other nodes that the node can connect to. For example, in the example shown in Figure 2, the degree of freedom of the node where charging gun 13 is located is 4, the degree of freedom of the node where charging gun 1 is located is 2, and the degree of freedom of the node where charging gun 2 is located is 3. Finally, according to the user's selection, the degree of freedom of the nodes where the charging guns are located is edited, that is, bridging nodes are added to the node towards more distant nodes. Increasing the number of bridging nodes increases the degree of freedom. The edited kilometer topology is shown in Figure 3. After editing, the degree of freedom of the node where charging gun 13 is located is 7, the degree of freedom of the node where charging gun 1 is located is 3, and the degree of freedom of the node where charging gun 2 is located is 5. Therefore, step S1 includes:

[0035] Based on the user's input of the number and arrangement requirements of charging guns, a charging pile power matrix topology allocation network is established. The charging pile power matrix topology allocation network includes multiple planar matrix nodes. Each node is equipped with a charging gun and a power conversion unit connected to the charging gun. A contactor switch unit is set between adjacent matrix nodes.

[0036] The user-selected planar matrix nodes are edited with degrees of freedom. Contactor switch units are set between the user-selected planar matrix nodes and one or more of the remaining planar matrix nodes to establish a connection relationship, forming the two-dimensional initial charging pile power topology network.

[0037] Thus, a preliminary solution for a chaotic power routing topology based on a matrix shape has been completed. The chaotic power routing topology solution has no fixed shape; it can be customized according to user needs and has a free connection method. Therefore, it can achieve efficient flexible power scheduling and arbitrarily customize the degrees of freedom of all nodes in the power topology, ensuring that each node can achieve the user's expected efficiency.

[0038] Step S2: Using a Gaussian kernel function, the dimension of the initial chaotic topology allocation network of the charging pile power is extended to a high-dimensional surface to obtain a chaotic topology allocation network of the charging pile power with multiple charging nodes. Each charging node is equipped with a charging gun and a power conversion unit connected to the charging gun. A contactor switch unit is set between nodes with connection relationships.

[0039] Specifically, in one embodiment of the present invention, two-dimensional matrix nodes can be directly linearly classified in two-dimensional space. However, given the unknown boundaries that users might edit, we cannot directly classify the new topology on the two-dimensional plane. Therefore, it is necessary to expand the dimension of the new topology model to a high-dimensional surface to achieve linear separability and path-followable characteristics in a high-dimensional environment. Therefore, step S2 includes:

[0040] Step S21: Expand the dimension of the initial chaotic topology allocation network of the charging pile power using the Gaussian kernel function;

[0041] Specifically, in one embodiment of the present invention, a Gaussian kernel function is used as the feature mapping vector, and the expression of the Gaussian function is:

[0042]

[0043] Each node containing a power conversion unit is mapped using a Gaussian kernel function, and the mapped vector is represented as follows:

[0044]

[0045] To achieve higher-dimensional expansion, after performing a Taylor expansion on the Gaussian kernel, the mapping function can be further expressed as:

[0046]

[0047] After expansion and calculation, the vector expression can be obtained as follows:

[0048]

[0049] Thus, the two-dimensional coordinate system of x and y has been successfully elevated to a high-dimensional space with infinite dimensions. The chaotic topology power routing model can achieve linear separability in the high-dimensional space. The chaotic topology system is expanded from two-dimensional space to a multi-faceted matrix topology model in high-dimensional space. On this high-dimensional curved space, all the contactor switching unit connections do not overlap, and the routes between power conversion units are independent and separable.

[0050] Step S22: Based on the maximum degrees of freedom of the charging nodes, perform dimensionality reduction processing on the initial chaotic topology allocation network of the charging pile power after dimensional expansion to obtain the chaotic topology allocation network of the charging pile power.

[0051] Specifically, in one embodiment of the present invention, the computational cost in the high-dimensional curved space is relatively large. Therefore, in order to meet the requirements of linear separability and the constraint of controllable computational cost, we need to perform dimensionality reduction based on the maximum degree of freedom of the charging node. For example, in the embodiment shown in Figure 3, the maximum degree of freedom of the node (number of outward connections) is 7, and we only need to expand it to a 7-dimensional space to meet the requirements. The specific approach of the present invention is as follows: retain the Gaussian kernel function in the 6-level series after Taylor expansion, and design the weights of all subsequent series to be 0.

[0052] In this embodiment, the chaotic topological power allocation component undergoes dimensionality increase and then dimensionality reduction, and continues to perform power allocation in a matrix manner, thereby solving the problem of consistency in power allocation strategies across all chaotic models.

[0053] Step S3: Based on the chaotic topology distribution network of the charging pile power, the required power of each charging gun and the power distribution strategy, control the closing and opening of the contactor switch unit to control the power guidance of the output of the power conversion unit.

[0054] Specifically, in one embodiment of the present invention, after generating the chaotic topology allocation network for charging pile power, the required power of all charging guns is input. Subsequently, the power routing network state is adjusted according to whether each charging gun is activated and the system's charging allocation strategy, outputting power to the charging guns.

[0055] Specifically, after a charging gun is started, the contactor switch unit directly connected to the started charging gun is first disconnected, and the power from the power conversion unit connected to the started charging gun is input to the started charging gun. Furthermore, since each charging gun has a different power requirement, the power input from a single power conversion unit may not meet its demand. That is, when the power of the power conversion unit connected to the started charging gun is less than the required power of the started charging gun, it is necessary to connect other power conversion units in the charging pile power chaotic topology distribution network to provide power. Therefore, step S3 includes:

[0056] After one of the multiple charging guns is started, the contactor switch unit directly connected to the started charging gun is disconnected, and the power of the power conversion unit connected to the started charging gun is input to the started charging gun.

[0057] When the power of the power conversion unit connected to the activated charging gun is less than the required power of the activated charging gun, the charging pile power chaotic topology allocation network searches for any available power conversion units among the power conversion units connected to the charging node where the activated charging gun is located. When an available power conversion unit is found, the contactor switch unit between the charging node where the available power conversion unit is located and the charging node where the activated charging gun is located is closed, and the power of the available power conversion unit is input to the activated charging gun.

[0058] When the sum of the power of the power conversion unit connected to the activated charging gun and the power of all idle power conversion units is less than the required power of the activated charging gun, the charging pile power chaotic topology allocation network searches for a second type of power conversion unit among the power conversion units connected to the charging node where the already occupied power conversion unit is located. The second type of power conversion unit is a power conversion unit that has been occupied by other charging guns and whose utilization rate is lower than that occupied by the activated charging gun. When the second type of power conversion unit is found, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the activated charging gun is located is closed, and the power of the second type of power conversion unit is input to the activated charging gun.

[0059] This invention also provides a DC power distribution system for charging piles based on chaotic topology, comprising: an initial chaotic topology distribution network establishment module, used to establish an initial chaotic topology distribution network for charging pile power based on a matrix topology network according to user needs; and a dimension expansion module, used to expand the dimension of the initial chaotic topology distribution network for charging pile power to a high-dimensional surface through a Gaussian kernel function, to obtain a chaotic topology distribution network for charging pile power with multiple charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between nodes with connection relationships; and a control module, used to control the closing and opening of the contactor switch unit to control the power guidance output of the power conversion unit based on the chaotic topology distribution network for charging pile power, the required power of each charging gun, and the power distribution strategy.

[0060] This invention also provides a DC power distribution device for charging piles based on chaotic topology, which may include:

[0061] Memory, used to store computer programs;

[0062] When a processor executes a computer program stored in the aforementioned memory, it can perform the following steps:

[0063] Based on user requirements, an initial chaotic topology allocation network for charging pile power is established using a matrix topology network. The dimension of this initial chaotic topology allocation network is extended to a high-dimensional surface using a Gaussian kernel function, resulting in a charging pile power chaotic topology allocation network with multiple charging nodes. Each charging node is equipped with a charging gun and a power conversion unit connected to the charging gun. Contactor switch units are installed between nodes with connections. Based on the charging pile power chaotic topology allocation network, the required power of each charging gun, and the power allocation strategy, the closing and opening of the contactor switch units are controlled to control the power guidance output of the power conversion unit.

[0064] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0065] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0066] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0067] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. 1 A DC power allocation method for charging piles based on chaotic topology, characterized in that, Includes the following steps: Based on user requirements, an initial chaotic topology allocation network for charging pile power is established based on a matrix topology network. By using a Gaussian kernel function, the dimension of the initial chaotic topology allocation network of the charging pile power is extended to a high-dimensional surface, resulting in a chaotic topology allocation network of the charging pile power with multiple charging nodes. Each charging node is equipped with a charging gun and a power conversion unit connected to the charging gun. Contactor switch units are set between nodes with connection relationships. Based on the chaotic topology of the charging pile power allocation network, the power demand of each charging gun and the power allocation strategy, the closing and opening of the contactor switch unit is controlled to control the power orientation of the power conversion unit output.

2. The DC power allocation method for charging piles based on chaotic topology as described in claim 1, characterized in that, Based on user requirements, the steps for establishing a two-dimensional initial charging pile power topology network based on a matrix topology network include: Based on the user's input of the number and arrangement requirements of charging guns, a charging pile power matrix topology allocation network is established. The charging pile power matrix topology allocation network includes multiple planar matrix nodes. Each node is equipped with a charging gun and a power conversion unit connected to the charging gun. A contactor switch unit is set between adjacent matrix nodes. The user-selected planar matrix nodes are edited with degrees of freedom. Contactor switch units are set between the user-selected planar matrix nodes and one or more of the remaining planar matrix nodes to establish a connection relationship, forming the two-dimensional initial charging pile power topology network.

3. The DC power allocation method for charging piles based on chaotic topology as described in claim 1, characterized in that, The steps of extending the dimension of the initial chaotic topology allocation network of the charging pile power to a high-dimensional surface by using a Gaussian kernel function to obtain a chaotic topology allocation network of the charging pile power with multiple charging nodes include: The Gaussian kernel function is used to expand the dimensionality of the initial chaotic topology allocation network for the charging pile power. Based on the maximum degrees of freedom of the charging nodes, the initial chaotic topology allocation network of the charging pile power after dimensional expansion is subjected to dimensionality reduction processing to obtain the chaotic topology allocation network of the charging pile power.

4. The DC power allocation method for charging piles based on chaotic topology as described in claim 3, characterized in that, The steps for controlling the power guidance of the power conversion unit output by controlling the closing and opening of the contactor switch unit based on the chaotic topology allocation network of the charging pile power, the power demand of each charging gun, and the power allocation strategy include: After one of the multiple charging guns is started, the contactor switch unit directly connected to the started charging gun is disconnected, and the power of the power conversion unit connected to the started charging gun is input to the started charging gun. When the power of the power conversion unit connected to the activated charging gun is less than the power required by the activated charging gun, the power chaotic topology allocation network of the charging pile searches for an available power conversion unit among the power conversion units connected to the charging node where the activated charging gun is located. When an available power conversion unit is found, the contactor switch unit between the charging node where the available power conversion unit is located and the charging node where the activated charging gun is located is closed, and the power of the available power conversion unit is input to the activated charging gun.

5. The DC power distribution method for charging piles based on chaotic topology as described in claim 4, characterized in that, Also includes: When the sum of the power of the power conversion unit connected to the activated charging gun and the power of all idle power conversion units is less than the required power of the activated charging gun, the charging pile power chaotic topology allocation network searches for a second type of power conversion unit among the power conversion units connected to the charging node where the already occupied power conversion unit is located. The second type of power conversion unit is a power conversion unit that has been occupied by other charging guns and whose utilization rate is lower than that occupied by the activated charging gun. When the second type of power conversion unit is found, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the activated charging gun is located is closed, and the power of the second type of power conversion unit is input to the activated charging gun.

6. A DC power distribution system for charging piles based on chaotic topology, characterized in that, include: The initial chaotic topology allocation network establishment module is used to establish an initial chaotic topology allocation network for charging pile power based on a matrix topology network according to user requirements. as well as The dimension expansion module is used to expand the dimension of the initial chaotic topology allocation network of the charging pile power to a high-dimensional surface through a Gaussian kernel function, so as to obtain a chaotic topology allocation network of the charging pile power with multiple charging nodes. Each charging node is equipped with a charging gun and a power conversion unit connected to the charging gun. A contactor switch unit is set between nodes with connection relationship. The control module is used to control the power orientation of the power conversion unit by controlling the closing and opening of the contactor switch unit based on the chaotic topology distribution network of the charging pile power, the power demand of each charging gun and the power distribution strategy.

7. A charging pile, characterized in that, The charging pile includes the DC power distribution system for charging piles based on chaotic topology as described in claim 6.

8. A DC power distribution device for charging piles based on chaotic topology, characterized in that, It includes a processor and a memory, the memory storing a computer program, which, when executed by the processor, implements the steps of the DC power distribution method for charging piles based on chaotic topology as described in any one of claims 1 to 5.

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