Charging pile direct current power distribution method and system based on chaos topology

Abstract

The invention discloses a charging pile direct current power distribution method based on chaos topology, and the method comprises the steps: building a charging pile power initial chaos topology distribution network based on a matrix topology network according to user demands; expanding the dimension of the charging pile power initial chaotic topological distribution network to a high-dimensional curved surface through a Gaussian kernel function to obtain a charging pile power chaotic topological distribution network with a plurality of charging nodes; on the basis of the charging pile power chaos topology distribution network, the required power of each charging gun and a power distribution strategy, controlling on and off of a contactor switch unit so as to control guiding of power output by a power conversion unit; therefore, efficient power flexible scheduling can be realized, the degree of freedom of all nodes in the power topology can be customized at will, and it is ensured that each node can reach the efficiency expected by a user.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a charging pile DC power distribution method and system based on chaotic topology. Background Art

[0002] After starting charging, the controller of the charging pile first requests charging data from all vehicles to be charged. The charging pile dynamically calculates the required power of each vehicle based on the output capacity of its own power unit, and dynamically adjusts the real-time output power of each vehicle. During charging, the charging required power of each vehicle is still calculated in real time to avoid redundant startup and allocation of power units. The use of excellent power routing topology can improve the utilization efficiency of power modules, while reducing equipment production costs, shortening vehicle charging time, and improving user charging experience. The current mainstream power routing topologies include linear distribution topology, ring distribution topology, star ring distribution topology, and matrix distribution topology. However, there are problems such as low power utilization or dead spots in supercharging power distribution, and it is impossible to flexibly customize some node degrees of freedom.

[0003] Based on this, a new solution is needed. Summary of the invention

[0004] The main purpose of the present invention is to provide a charging pile DC power distribution method based on chaotic topology to address the problems of low power utilization, blind spots in supercharging power distribution, and inability to flexibly customize node freedom in existing power routing topologies.

[0005] To achieve the above object, the present invention provides a charging pile DC power distribution method based on chaotic topology, comprising the following steps:

[0006] According to user needs, an initial chaotic topology distribution network for charging pile power is established based on a matrix topology network; and

[0007] By using a Gaussian kernel function, the dimension of the initial chaotic topological distribution network of the charging pile power is expanded to a high-dimensional surface, and a charging pile power chaotic topological distribution network with multiple charging nodes is obtained, 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 the nodes having a connection relationship;

[0008] Based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power direction output by the power conversion unit.

[0009] In the charging pile DC power distribution method based on chaotic topology provided by the present invention, according to user needs, the steps of establishing a two-dimensional initial charging pile power topology network based on a matrix topology network include:

[0010] Based on the number and arrangement requirements of the charging guns input by the user, a charging pile power matrix topology distribution network is established, wherein the charging pile power matrix topology distribution network includes a plurality of planar matrix nodes, each 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 adjacent matrix nodes;

[0011] The plane matrix node selected by the user is freely edited, and a contactor switch unit is set between the plane matrix node selected by the user and one or more of the remaining plane matrix nodes to establish a connection relationship, so as to form the two-dimensional initial charging pile power topology network.

[0012] In the charging pile DC power distribution method based on chaotic topology provided by the present invention, the dimension of the initial chaotic topology distribution network of the charging pile power is expanded to a high-dimensional surface through a Gaussian kernel function, and the steps of obtaining a charging pile power chaotic topology distribution network with multiple charging nodes include:

[0013] Using the Gaussian kernel function, the dimension of the charging pile power initial chaotic topology distribution network is expanded;

[0014] According to the maximum degree of freedom of the charging node, the initial chaotic topology distribution network of the charging pile power is subjected to dimensionality reduction processing after the dimension expansion to obtain the chaotic topology distribution network of the charging pile power.

[0015] In the charging pile DC power distribution method based on chaotic topology provided by the present invention, the step of controlling the power direction output by the power conversion unit by controlling the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy includes:

[0016] After one of the plurality of charging guns is started, disconnecting a contactor switch unit directly connected to the started charging gun, and inputting power of a power conversion unit connected to the started charging gun to the started charging gun;

[0017] 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, the charging pile power chaotic topology distribution network is searched to see whether there is an idle power conversion unit among the power conversion units connected to the charging node where the started charging gun is located. When an idle power conversion unit is found, the contactor switch unit between the charging node where the idle power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the idle power conversion unit is input to the started charging gun.

[0018] The chaotic topology-based charging pile DC power distribution method provided by the present invention also includes: when the sum of the power of the power conversion unit connected to the started charging gun and the power of all idle power conversion units is less than the required power of the started charging gun, searching the charging pile power chaotic topology distribution network for a second type of power conversion unit among the power conversion units connected to the charging node where the occupied power conversion unit is located, the second type of power conversion unit is occupied by other charging guns and has a lower utilization rate than the power conversion unit occupied by the started charging gun, and when the second type of power conversion unit is searched, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the second type of power conversion unit is input to the started charging gun.

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

[0020] An initial chaotic topology distribution network establishment module is used to establish an initial chaotic topology distribution network for charging pile power based on a matrix topology network according to user needs; and

[0021] A dimension expansion module, used to expand the dimension of the initial chaotic topology distribution network of the charging pile power to a high-dimensional surface through a Gaussian kernel function, so as to obtain a charging pile power chaotic topology distribution network having 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 the nodes having a connection relationship;

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

[0023] According to yet another aspect of the present invention, a charging pile is further provided, wherein the charging pile comprises the charging pile DC power distribution system based on chaotic topology as described above.

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

[0025] The charging pile DC power distribution method based on chaotic topology provided by the present invention has the following beneficial effects: the present invention proposes a charging pile DC power distribution method based on chaotic topology, and according to user needs, an initial chaotic topology distribution network of charging pile power is established based on a matrix topology network; through a Gaussian kernel function, the dimension of the initial chaotic topology distribution network of charging pile power is expanded to a high-dimensional surface to obtain a charging pile power chaotic topology distribution network with multiple charging nodes; then based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power orientation of the power conversion unit output; thereby, efficient power flexible 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0027] Figure 1 The figure shows a flow chart of a charging pile DC power distribution method based on chaotic topology provided by an embodiment of the present invention;

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

[0029] Figure 3 Shown is the expanded charging pile power matrix topology distribution network. DETAILED DESCRIPTION

[0030] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Typical embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] Figure 1FIG. 1 is a flow chart of a method for distributing DC power of a charging pile based on chaotic topology according to an embodiment of the present invention. Figure 1 As shown, the charging pile DC power distribution method based on chaotic topology provided by the present invention includes the following steps:

[0033] Step S1: According to user needs, an initial chaotic topology distribution network for charging pile power is established based on a matrix topology network;

[0034] Specifically, in one embodiment of the present invention, first, according to user needs, the number and coding of charging guns that the user wants to set in the system are confirmed and these charging gun nodes are distributed on the nodes of the matrix grid for initialization, such as Figure 2 As shown in the figure, a matrix grid is established according to user needs, which includes 16 charging guns. Then, in the matrix topology network of charging guns, the user selects a charging gun node with a higher degree of freedom from all the above nodes, where the degree of freedom refers to the number of other nodes that the node can connect to. For example, Figure 2 In the example shown, 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 choice, the degree of freedom of the node where the charging gun is located is edited, that is, a bridge node is added from the node to the farther node, and the increase in the number of bridge nodes is the increase in the degree of freedom. The edited kilometer topology is shown in 3. The degree of freedom of the node where charging gun 13 is located after editing 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 number and arrangement requirements of the charging guns input by the user, a charging pile power matrix topology distribution network is established, wherein the charging pile power matrix topology distribution network includes a plurality of planar matrix nodes, each 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 adjacent matrix nodes;

[0036] The plane matrix node selected by the user is freely edited, and a contactor switch unit is set between the plane matrix node selected by the user and one or more of the remaining plane matrix nodes to establish a connection relationship, so as to form the two-dimensional initial charging pile power topology network.

[0037] Therefore, the scheme of chaotic power routing topology based on matrix shape has been preliminarily completed. The chaotic power routing topology scheme has no fixed shape. It deforms according to user customization and has free connection mode. Therefore, efficient power flexible scheduling can be achieved. The 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.

[0038] Step S2: By using a Gaussian kernel function, the dimension of the initial chaotic topological distribution network of the charging pile power is expanded to a high-dimensional surface to obtain a charging pile power chaotic topological distribution network having 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 the nodes having a connection relationship;

[0039] Specifically, in one embodiment of the present invention, the two-dimensional matrix nodes can be directly linearly classified in the two-dimensional space, but under the condition that we do not know which boundaries the user may edit, we will not be able to directly classify the new topology on the two-dimensional plane, so it is necessary to expand the dimension of the new topological model to a high-dimensional surface, so as to achieve the characteristics of linear separability and path-following in high dimensions. Therefore, step S2 includes:

[0040] Step S21: using the Gaussian kernel function to perform dimension expansion on the charging pile power initial chaotic topology allocation network;

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

[0042] e -δ||x -y ||2

[0043] The Gaussian kernel function is used to map the nodes where all power conversion units are located. The mapped vector is expressed as:

[0044]

[0045] In order to achieve higher-dimensional expansion, after Taylor expansion of the Gaussian kernel, the mapping function can be further expressed as:

[0046]

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

[0048]

[0049] At this point, the two-dimensional coordinate system of x and y has been successfully elevated to a high-dimensional space of infinite dimensions. The chaotic topological power routing model can be linearly separable in the high-dimensional space. The chaotic topological system is expanded from the two-dimensional space to a multi-faceted matrix topological model in the high-dimensional space. In this high-dimensional curved space, all the contactor switch unit connections have no overlap, and the routes between the power conversion units are independent and separable.

[0050] Step S22: According to the maximum degree of freedom of the charging node, the initial chaotic topology distribution network of the charging pile power is subjected to dimensionality reduction processing after the dimension expansion to obtain the chaotic topology distribution network of the charging pile power.

[0051] Specifically, in one embodiment of the present invention, the amount of calculation in the high-dimensional surface space is large. Therefore, in order to meet the requirements of linear separability and the limitation of controllable amount of calculation, we need to perform dimensionality reduction processing according to the maximum degree of freedom of the charging node. For example, Figure 3 In the embodiment shown, 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 needs. The specific method of the present invention is: retain the 6-level series of the Gaussian kernel function after Taylor expansion, and the weights of all subsequent series are designed to be 0.

[0052] In this embodiment, after the chaotic topology power distribution split is dimensionally increased and then dimensionally reduced, it continues to distribute power in a matrix manner, thereby solving the problem of consistency of power distribution strategies for all chaotic models.

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

[0054] Specifically, in one embodiment of the present invention, after the charging pile power chaotic topology distribution network is generated, the required power of all charging guns is input. Subsequently, the power routing network state is adjusted according to whether each charging gun is started or not and the charging distribution strategy of the system, and the power required by the charging gun is output.

[0055] Specifically, after a certain charging gun is started, the contactor switch unit directly connected to the started charging gun is first disconnected, and the power of the power conversion unit connected to the started charging gun is input to the started charging gun. Furthermore, since the power requirements of each charging gun are different, the power input by a single power conversion unit may not be able to meet its requirements, that is, when the power of the power conversion unit connected to the started charging gun is less than the power requirements 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 for it. Therefore, step S3 includes:

[0056] After one of the plurality of charging guns is started, disconnecting a contactor switch unit directly connected to the started charging gun, and inputting power of a power conversion unit connected to the started charging gun to the started charging gun;

[0057] 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, search the charging pile power chaotic topology distribution network for an idle power conversion unit among the power conversion units connected to the charging node where the started charging gun is located, and when an idle power conversion unit is found, close the contactor switch unit between the charging node where the idle power conversion unit is located and the charging node where the started charging gun is located, and input the power of the idle power conversion unit to the started charging gun;

[0058] When the sum of the power of the power conversion unit connected to the started charging gun and the power of all idle power conversion units is less than the required power of the started charging gun, the charging pile power chaotic topology distribution network is searched to see whether there is a second type of power conversion unit among the power conversion units connected to the charging node where the occupied power conversion unit is located, the second type of power conversion unit is occupied by other charging guns and has a lower utilization rate than the power conversion unit occupied by the started charging gun. When the second type of power conversion unit is searched, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the second type of power conversion unit is input to the started charging gun.

[0059] The present invention also provides a charging pile DC power distribution system based on chaotic topology, including: an initial chaotic topology distribution network establishment module, which is used to establish a charging pile power initial chaotic topology distribution network based on a matrix topology network according to user needs; and a dimension expansion module, which is used to expand the dimension of the charging pile power initial chaotic topology distribution network to a high-dimensional surface through a Gaussian kernel function to obtain a charging pile power chaotic topology distribution network 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 the nodes with a connection relationship; a control module, which is used to control the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy to control the power direction output by the power conversion unit.

[0060] The embodiment of the present invention further provides a charging pile DC power distribution device based on chaotic topology, which may include:

[0061] Memory for storing computer programs;

[0062] The processor can implement the following steps when executing the computer program stored in the above memory:

[0063] According to user needs, an initial chaotic topology distribution network for charging pile power is established based on a matrix topology network; through a Gaussian kernel function, the dimension of the initial chaotic topology distribution network for charging pile power is expanded to a high-dimensional surface to obtain a charging pile power chaotic topology distribution network 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 the nodes with a connection relationship; based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power orientation output by the power conversion unit.

[0064] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0065] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those explicitly recited in each claim. More specifically, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.

[0066] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0067] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A charging pile DC power distribution method based on chaotic topology, characterized in that: The following steps are involved: According to user needs, an initial chaotic topology distribution 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 topological distribution network of the charging pile power is expanded to a high-dimensional surface, and a charging pile power chaotic topological distribution network with multiple charging nodes is obtained, 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 the nodes having a connection relationship; Based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power direction output by the power conversion unit.

2. The method for distributing DC power of a charging pile based on chaotic topology according to claim 1, characterized in that: According to user needs, the steps of establishing a two-dimensional initial charging pile power topology network based on a matrix topology network include: Based on the number and arrangement requirements of the charging guns input by the user, a charging pile power matrix topology distribution network is established, wherein the charging pile power matrix topology distribution network includes a plurality of planar matrix nodes, each 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 adjacent matrix nodes; The plane matrix node selected by the user is freely edited, and a contactor switch unit is set between the plane matrix node selected by the user and one or more of the remaining plane matrix nodes to establish a connection relationship, so as to form the two-dimensional initial charging pile power topology network.

3. The method for distributing DC power of a charging pile based on chaotic topology according to claim 1, characterized in that: The steps of extending the dimension of the initial chaotic topology distribution network of the charging pile power to a high-dimensional surface by using a Gaussian kernel function to obtain a charging pile power chaotic topology distribution network with multiple charging nodes include: Using the Gaussian kernel function, the dimension of the charging pile power initial chaotic topology distribution network is expanded; According to the maximum degree of freedom of the charging node, the initial chaotic topology distribution network of the charging pile power is subjected to dimensionality reduction processing after the dimension expansion to obtain the chaotic topology distribution network of the charging pile power.

4. The method for distributing DC power of a charging pile based on chaotic topology according to claim 3, characterized in that: The steps of controlling the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy to control the power direction output by the power conversion unit include: After one of the plurality of charging guns is started, disconnecting a contactor switch unit directly connected to the started charging gun, and inputting power of a power conversion unit connected to the started charging gun to the started charging gun; 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, the charging pile power chaotic topology distribution network is searched to see whether there is an idle power conversion unit among the power conversion units connected to the charging node where the started charging gun is located. When an idle power conversion unit is found, the contactor switch unit between the charging node where the idle power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the idle power conversion unit is input to the started charging gun.

5. The method for distributing DC power of a charging pile based on chaotic topology according to claim 4, characterized in that: Also includes: When the sum of the power of the power conversion unit connected to the started charging gun and the power of all idle power conversion units is less than the required power of the started charging gun, the charging pile power chaotic topology distribution network is searched to see whether there is a second type of power conversion unit among the power conversion units connected to the charging node where the occupied power conversion unit is located, the second type of power conversion unit is occupied by other charging guns and has a lower utilization rate than the power conversion unit occupied by the started charging gun. When the second type of power conversion unit is searched, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the second type of power conversion unit is input to the started charging gun.

6. A charging pile DC power distribution system based on chaotic topology, characterized in that: include: An initial chaotic topology distribution network establishment module is used to establish an initial chaotic topology distribution network for charging pile power based on a matrix topology network according to user needs; as well as A dimension expansion module, used to expand the dimension of the initial chaotic topology distribution network of the charging pile power to a high-dimensional surface through a Gaussian kernel function, so as to obtain a charging pile power chaotic topology distribution network having 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 the nodes having a connection relationship; A control module is used to control the power direction output by the power conversion unit by controlling the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy.

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

8. A charging pile DC power distribution device based on chaotic topology, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the charging pile DC power distribution method based on chaotic topology as described in any one of claims 1 to 5 are implemented.

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