Charging station rectifier cabinet power distribution method and system

Abstract

The invention provides a charging station rectifier cabinet power distribution method and system, and the method comprises the steps: building a first pre-distribution power path between each charging gun in a plurality of charging guns in charging and a direct connection power module, and obtaining a first pre-distribution power path set; determining a second pre-distribution power path set of the charging gun in each charging process to obtain a plurality of second pre-distribution power path sets; processing the first pre-allocated power path set and the plurality of second pre-allocated power path sets according to a preset power module scheduling priority ranking strategy to obtain a third pre-allocated power path set meeting a preset power sum constraint condition; and according to the third pre-distributed power path set, updating the electric connection relationship between the plurality of charging guns in charging and the plurality of power supply modules. The method can effectively solve the problem of path blockage when the multiple charging piles share the rectifier cabinet, and facilitates the improvement of the power utilization rate.

Description

Technical Field

[0001] This application relates to the technical field of new energy power and energy storage, and particularly to a power distribution method and system for a rectifier cabinet in a charging station. Background Art

[0002] With the popularization of new energy vehicles, the demand for electric vehicle charging piles has increased rapidly. The rectifier cabinet is a core component in the charging pile system, which is used to convert alternating current into direct current for charging electric vehicles. The existing charging pile systems generally have the following problems: multiple charging pile terminals share the rectifier cabinet, which may lead to uneven resource allocation and low utilization rate; some charging guns have low demand, but it may cause energy waste because the guns with high demand cannot call idle modules.

[0003] Currently, the load management of the rectifier cabinet mainly adopts static allocation strategies or simple polling allocation strategies, lacking intelligent and real-time dynamic allocation strategies. Therefore, an efficient dynamic allocation method is needed, which can improve the utilization rate of the rectifier cabinet while meeting user needs. Summary of the Invention

[0004] This application provides a power distribution method and system for a rectifier cabinet in a charging station. By establishing a first pre-allocated power path set between the charging guns and the directly connected power modules, then determining a second pre-allocated power path set for each charging gun with different numbers of closed bus coupler contactors, then processing the above path sets according to a preset priority sorting strategy to obtain a third pre-allocated power path set whose sum of output powers is greater than the current state constraint, and finally updating the electrical connection relationship between the charging guns and the power modules accordingly to optimize power distribution, realize dynamic optimization of power paths, solve path blockage and improve system utilization rate.

[0005] In a first aspect, this application provides a power distribution method for a rectifier cabinet in a charging station, which is applied to a rectifier cabinet controller of the charging station. The charging station includes a plurality of power modules, a rectifier cabinet and a plurality of charging guns. The plurality of power modules are electrically connected to the rectifier cabinet, the rectifier cabinet is electrically connected to the plurality of charging guns. The rectifier cabinet includes the rectifier cabinet controller and a contactor circuit. The contactor circuit includes a plurality of bus coupler contactors that are electrically connected according to a preset topology. The method includes: Establish a first pre-allocated power path between each charging gun in the plurality of charging guns and the directly connected power module to obtain a first pre-allocated power path set; Determine the second pre-allocated power path set of each charging gun to obtain a plurality of second pre-allocated power path sets. A single second pre-allocated power path set includes a plurality of second pre-allocated power paths of a single charging gun and a plurality of closed bus coupler contactor numbers corresponding to the plurality of second pre-allocated power paths one by one; Process the first pre-allocated power path set and the multiple second pre-allocated power path sets according to a pre-set power module scheduling priority sorting strategy to obtain a third pre-allocated power path set that meets the pre-set total power constraint condition. The third pre-allocated power path set includes the first pre-allocated power path set and a fourth pre-allocated power path set, and the fourth pre-allocated power path set includes the second pre-allocated power paths in the multiple second pre-allocated power path sets. Update the electrical connection relationship between the multiple charging charging guns and the multiple power modules according to the third pre-allocated power path set.

[0006] In a second aspect, an embodiment of the present application provides a power distribution system for a rectifier cabinet of a charging station. The system includes multiple power modules, a rectifier cabinet, and multiple charging guns. The multiple power modules are electrically connected to the rectifier cabinet, and the rectifier cabinet is electrically connected to the multiple charging guns. The rectifier cabinet includes a rectifier cabinet controller and a contactor circuit. The contactor circuit includes multiple bus coupler contactors that build an electrical connection relationship according to a pre-set topology. Among them, The rectifier cabinet controller is configured to execute the steps of implementing the method described in the first aspect above.

[0007] In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, and one or more programs. The one or more programs are stored in the memory and are configured to be executed by the processor. The programs include instructions for executing the steps in the first aspect of the embodiments of the present application.

[0008] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program / instructions are stored. The computer program / instructions are executed by a processor to implement the steps of the method described in the first aspect above.

[0009] It can be seen that in the embodiment of the present application, the rectifier cabinet controller establishes a first pre-allocated power path between each of the charging charging guns and the directly connected power module in the multiple charging charging guns, and obtains a first pre-allocated power path set; determines the second pre-allocated power path set of each charging charging gun, and obtains a plurality of second pre-allocated power path sets; processes the first pre-allocated power path set and the plurality of second pre-allocated power path sets according to a preset power module scheduling priority sorting strategy, and obtains a third pre-allocated power path set that meets the preset power sum constraint condition; updates the electrical connection relationship between the multiple charging charging guns and the multiple power modules according to the third pre-allocated power path set. In this way, compared with the existing rectifier cabinet load management scheme that uses a static allocation strategy or a simple polling allocation strategy, the present application can effectively solve the path blocking problem when multiple charging piles share a rectifier cabinet by establishing a pre-allocated path between the charging gun and the directly connected power module, determining the extended path including different numbers of closed bus coupler contactors, and dynamically scheduling the path set according to the priority strategy, which is beneficial to improving the system power utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 is a system architecture diagram of a rectifier cabinet power distribution system provided by an embodiment of the present application; Figure 2 is a structural block diagram of an electronic device provided by an embodiment of the present application; Figure 3 is a step flow chart of a rectifier cabinet power distribution method provided by an embodiment of the present application; Figure 4 is a step flow chart of a third pre-allocated power path set determination strategy provided by an embodiment of the present application; Figure 5 is a schematic flow diagram of a first round of pre-allocation operation provided by an embodiment of the present application; Figure 6 is a schematic structural diagram of a star topology provided by an embodiment of the present application; Figure 7 is a schematic structural diagram of a star topology after the first round of pre-allocation operation provided by an embodiment of the present application; Figure 8 is a schematic structural diagram of a star topology after the second round of pre-allocation operation provided by an embodiment of the present application; Figure 9It is a schematic structural diagram of a star topology after the third round of pre-allocation operation provided by an embodiment of the present application; Figure 10 It is a functional unit block diagram of a power distribution system for a rectifier cabinet of a charging station provided by an embodiment of the present application. Detailed implementation manners

[0012] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0013] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0014] Referring to "embodiment" in this article means that a specific feature, structure or characteristic described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0015] The "and / or" in the embodiments of the present application describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone; A and B exist simultaneously; B exists alone. Among them, A and B can be singular or plural.

[0016] In the embodiments of the present application, the symbol " / " can represent that the front and rear associated objects are an "or" relationship. In addition, the symbol " / " can also represent a division sign, that is, perform a division operation. For example, A / B can represent A divided by B.

[0017] The "at least one (piece)" or its similar expression in the embodiments of the present application refers to any combination of these items, including any combination of a single item (piece) or multiple items (pieces), meaning one or more, and multiple means two or more. For example, at least one (piece) of a, b, or c can represent the following seven situations: a, b, c, a and b, a and c, b and c, a, b, and c. Among them, each of a, b, and c can be an element or a set containing one or more elements.

[0018] In the embodiments of the present application, "equal to" can be used in combination with "greater than" and is applicable to the technical solutions adopted when it is greater than, or can also be used in combination with "less than" and is applicable to the technical solutions adopted when it is less than. When "equal to" is used in combination with "greater than", it is not used in combination with "less than"; when "equal to" is used in combination with "less than", it is not used in combination with "greater than".

[0019] Currently, the load management of the rectifier cabinet mainly adopts a static allocation strategy or a simple polling allocation strategy, lacking an intelligent and real-time dynamic allocation strategy. Therefore, an efficient dynamic allocation method is needed, which can improve the utilization rate of the rectifier cabinet while meeting user requirements.

[0020] In view of the above problems, the embodiments of the present application provide a method and system for power allocation of a rectifier cabinet in a charging station. The embodiments of the present application will be introduced in detail below with reference to the accompanying drawings.

[0021] Please refer to Figure 1 , Figure 1 which is the system architecture diagram of a power allocation system for a rectifier cabinet in a charging station provided by the embodiments of the present application. As shown in Figure 1 , the system architecture diagram of the power allocation system for the rectifier cabinet in the charging station includes a power supply module 110, a rectifier cabinet 120, and a charging gun 130. Among them, the rectifier cabinet 120 includes a rectifier cabinet controller 121 and a contactor circuit 122, and the contactor circuit 122 includes a bus tie contactor.

[0022] Among them, the number of the power supply module 110, the charging gun 130, and the bus tie contactor can be specifically set to be multiple. Multiple power supply modules 110 are electrically connected to the rectifier cabinet 120, the rectifier cabinet 120 is electrically connected to multiple charging guns 130, and the contactor circuit 122 includes multiple bus tie contactors that build an electrical connection relationship according to a preset topology.

[0023] Specifically, the power supply module 110 is a device capable of storing or generating electric energy, such as a common battery module composed of multiple battery cells, or a current conversion device with the function of electric energy conversion. The electric energy generated or stored by the power supply module 110 will be transmitted to the rectifier cabinet 120 in an electrically connected manner, which is the source of the electric energy supply for the entire charging station.

[0024] Specifically, the rectifier cabinet 120 is the core hub of the rectifier cabinet power distribution system of the entire charging station. Among them, the rectifier cabinet controller 121 is used to continuously monitor and collect the status information from the power modules 110 (such as remaining power, output power, etc.) and the real-time demands of each charging gun 130 (such as current charging power demand, whether a vehicle is connected, etc.); and, based on this information, the rectifier cabinet controller 121 performs calculations and makes decisions according to the preset power distribution strategy to determine how to reasonably distribute the power of multiple power modules 110 to each charging gun, so as to optimize the overall power utilization of the system and avoid the situation where some charging guns 130 have insufficient power while some power modules 110 have idle electrical energy. The contactor circuit 122 is the execution unit for the rectifier cabinet 120 to achieve power distribution control. The bus tie contactor is essentially a controlled switch device. Under the command of the rectifier cabinet controller 121, they can quickly close or open, thereby changing the connection state of the circuit.

[0025] Specifically, the charging gun 130 is the charging device directly used by users at the charging station and is the terminal component for realizing the transmission of electrical energy from the charging station to electrical equipment such as electric vehicles. During the charging process, the charging gun 130 has to undertake the task of electrical energy transmission and also needs to have the function of communicating with the vehicle to monitor the charging status in real time and feedback it to the rectifier cabinet controller 121, so that the rectifier cabinet controller 121 can dynamically adjust the power distribution strategy according to the actual situation to ensure the safety, stability and efficiency of the charging process.

[0026] It can be seen that in this embodiment, through the cooperation of the power module, rectifier cabinet, rectifier cabinet controller, contactor circuit and bus tie contactor constructed according to the preset topology, and the charging gun, the intelligent distribution and flexible regulation of the charging station power are realized, which can effectively improve the power utilization rate, solve the path congestion problem, reduce the algorithm complexity, reduce the hardware switching risk, and ensure the safety, stability and efficiency of the charging process.

[0027] Please refer to Figure 2 , Figure 2 which is the structural block diagram of an electronic device provided by an embodiment of the present application and is used to execute the Figure 1 charging station rectifier cabinet power distribution system in Figure 2As shown, the electronic device 20 may include one or more of the following components: a memory 23, a processor 21, a communication bus 30, a communication interface 22, and one or more programs 231. The one or more programs 231 are stored in the memory 23 and are configured to be executed by the processor 21. The one or more programs 231 include instructions for performing any step in the following method embodiments. In a specific implementation, the processor 21 is used to execute any step in the following method embodiments, and when performing data transmission such as sending, the communication interface 22 can be selectively called to complete the corresponding operation. Among them, the electronic device 20 may be a mobile phone terminal, a tablet computer, a laptop computer, and a wearable intelligent device.

[0028] The processor 21 may include one or more processing cores. The processor 21 connects various parts within the entire electronic device 20 using various interfaces and lines. By running or executing instructions, programs, code sets, or instruction sets stored in the memory 23, and by calling data stored in the memory 23, the processor 21 performs various functions of the electronic device 20 and processes data. Optionally, the processor 21 may be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA). The processor 21 may integrate a combination of one or several of a central processing unit (CPU), a graphics processing unit (GPU), and a modem, etc. Among them, the CPU mainly processes the operating system, user interface, and application programs, etc.; the GPU is responsible for rendering and drawing the displayed content; the modem is used to process wireless communication. It can be understood that the above modem may not be integrated into the processor 21 and may be implemented separately by a communication chip.

[0029] The memory 23 may include random access memory (RAM) and may also include read-only memory (ROM). The memory 23 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 23 may include a program storage area and a data storage area. Among them, the program storage area may store instructions for implementing the operating system, instructions for implementing at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above various method embodiments, etc. The data storage area may also store data created during the use of the electronic device 20.

[0030] It can be understood that the electronic device 20 may include more or fewer structural elements than those shown in the above structural block diagram. For example, it may include a power module, physical buttons, a Wi-Fi module, a speaker, a Bluetooth module, sensors, etc., which are not limited herein.

[0031] Please refer to Figure 3 , Figure 3 which is a flowchart of the steps of a power distribution method for a rectifier cabinet of a charging station provided by an embodiment of the present application, and is applied to Figure 1 the rectifier cabinet controller 121 in Figure 3 as shown in Step S310: Establish a first pre-allocated power path between each charging charging gun among multiple charging charging guns and a directly connected power module to obtain a first pre-allocated power path set.

[0032] Among them, by establishing a direct connection between the charging gun and the directly connected power module, it is ensured that each charging gun obtains at least basic power support, avoiding power supply delay or interruption caused by complex path scheduling; and, the direct connection path does not require an additional closing bus coupler contactor, reducing the complexity of the initial allocation and providing a stable basis for subsequent extended allocation.

[0033] In a possible embodiment, the directly connected power module refers to the power module among the multiple power modules that is directly electrically connected to the charging charging gun.

[0034] Among them, when establishing the direct connection path, the priority of the direct connection path can be dynamically adjusted according to real-time parameters such as the module health status or temperature, rather than fixed allocation.

[0035] Among them, when establishing the direct connection path, some modules can be reserved as "elastic resources" to reserve space for subsequent high-priority requirements.

[0036] It can be understood that, as the starting point of multiple rounds of pre-allocation, allocating the most direct and reliable power module to each charging gun can ensure that the basic requirements are met. By preferentially occupying the directly connected module, the number of optional paths to be considered in subsequent rounds is reduced, optimizing the algorithm efficiency. If the total power of the directly connected modules cannot meet the requirements of the charging gun, the multi-round extended allocation in step S320 is triggered.

[0037] Step S320: Determine a second pre-allocated power path set for each charging charging gun to obtain multiple second pre-allocated power path sets.

[0038] Among them, a single second pre-allocated power path set includes multiple second pre-allocated power paths of a single charging charging gun and the number of multiple closing bus coupler contactors corresponding to the multiple second pre-allocated power paths one by one.

[0039] Among them, a single second pre-allocated power path includes the charging gun serial number capable of forming a power supply loop for the charging gun during charging, the module serial number of the non-directly connected power supply module, and the contactor serial number of the bus tie contactor that needs to be closed. The number of single closed bus tie contactors refers to the number of closed contactors of the bus tie contactors that need to be closed in the corresponding second pre-allocated power path.

[0040] Among them, the number of bus tie contactors that need to be closed in each second pre-allocated power path is recorded. This number reflects the complexity and control cost of the path and is an important consideration factor when sorting by priority later. Generally speaking, the fewer the number of closed contactors, the relatively simpler the path and the more likely it is to be considered preferentially.

[0041] Specifically, for each charging gun during charging, by analyzing and calculating the connection relationships of all non-directly connected power supply modules and the corresponding bus tie contactors in the system, all possible combinations that can form a power supply loop are found, thereby determining multiple second pre-allocated power paths, and these paths form the second pre-allocated power path set of a single charging gun.

[0042] It should be clear that as the charging process progresses, the states of the power supply modules (such as remaining battery power, output power changes, etc.) and the requirements of the charging guns (such as power requirement changes caused by changes in the vehicle battery power, etc.) may all change. The algorithm can be further optimized to achieve real-time dynamic update of the second pre-allocated power path set, ensuring that the system can always make the optimal power distribution decision based on the latest state information.

[0043] It can be understood that step S320 provides multiple alternative paths other than the direct connection path for subsequent power path selection and is an important basis for realizing dynamic and flexible power distribution. When the direct connection path cannot meet the power requirement of the charging gun, a suitable one can be selected from these alternative paths to supplement the power.

[0044] It can be seen that in this embodiment, the information such as the number of closed bus tie contactors included in each path in the second pre-allocated power path set is an important basis for subsequent path screening and sorting according to the preset power supply module scheduling priority sorting strategy. By processing these paths according to the priority, the power can be distributed more reasonably, improving the overall power utilization rate and operation efficiency of the system.

[0045] Step S330, process the first pre-allocated power path set and the multiple second pre-allocated power path sets according to the preset power supply module scheduling priority sorting strategy to obtain a third pre-allocated power path set that meets the preset power sum constraint condition.

[0046] Among them, the third pre-allocated power path set includes the first pre-allocated power path set and the fourth pre-allocated power path set, and the fourth pre-allocated power path set includes the second pre-allocated power paths in the multiple second pre-allocated power path sets.

[0047] Among them, the preset power sum constraint condition means that the sum of the output powers of multiple power supply modules called in the third pre-allocated power path set is greater than the sum of the output powers of the multiple charging guns in the current charging state.

[0048] It can be seen that in this embodiment, through priority sorting and constraint condition screening, the initial path set is transformed into an optimal path combination that meets the power requirements, which is the core decision-making link of the entire power distribution algorithm, realizing efficient scheduling and providing a clear execution plan for subsequent hardware control.

[0049] Step S340, update the electrical connection relationship between the multiple charging guns being charged and the multiple power supply modules according to the third pre-allocated power path set.

[0050] Specifically, by releasing redundant connections and establishing new paths, the physical implementation of the third pre-allocated path set is realized to ensure that the power is transmitted according to the optimized scheme.

[0051] In a possible embodiment, the updating the electrical connection relationship between the multiple charging guns being charged and the multiple power supply modules according to the third pre-allocated power path set includes: releasing the power supply modules and bus coupler contactors of the multiple charging guns being charged except for the directly connected power supply modules; sequentially turning on the power supply modules and bus coupler contactors belonging to the charging guns being charged in the fourth pre-allocated power path set.

[0052] Among them, if the opening of a certain path fails, it can be quickly rolled back to the direct connection path (the first pre-allocated path set) to ensure the basic charging function.

[0053] Among them, for paths without conflicts, the release / opening operations are allowed to be executed simultaneously to shorten the switching time, and the current upper limit is dynamically adjusted during the switching process to reduce the impact of inrush current on the equipment.

[0054] Among them, during the process of updating the electrical connection relationship between the multiple charging guns being charged and the multiple power supply modules, the detection of the action state of the contactors can be increased, and if the opening fails, the alternative path is automatically tried.

[0055] Furthermore, after the path is updated, it is necessary to trigger the power monitoring module to verify the distribution effect, such as detecting whether the actual power meets the requirements.

[0056] It can be seen that in this embodiment, by establishing the first pre-allocated power path set between the charging gun and the direct-connected power module, then determining the second pre-allocated power path set with different numbers of closed bus coupler contactors for each charging gun, and then processing the above path sets according to the preset priority sorting strategy, a third pre-allocated power path set that satisfies the sum of output powers being greater than the current state constraint is obtained. Finally, the electrical connection relationship between the charging gun and the power module is updated accordingly to optimize power distribution, achieve dynamic optimization of the power path, solve path blockage, and improve system utilization rate.

[0057] Please refer to Figure 4 , Figure 4 FIG. is a flowchart of the steps of a third pre-allocated power path set determination strategy provided by an embodiment of the present application. Among them, in terms of processing the first pre-allocated power path set and the multiple second pre-allocated power path sets according to the preset power module scheduling priority sorting strategy to obtain a third pre-allocated power path set that satisfies the preset sum of power constraint conditions, the above method may further include the following steps: Step S410, perform the first-round pre-allocation operation to obtain the first number of second pre-allocated power paths as the first-round candidate power paths.

[0058] Among them, for the second pre-allocated power paths with the number of closed contactors being 1 in the multiple second pre-allocated power path sets, the first-round pre-allocation operation is performed.

[0059] Among them, a path with the number of closed contactors being 1 means that only 1 contactor needs to be switched to establish a power path. The hardware operation is simple and the loss is low. Processing such paths first can quickly optimize power distribution and reduce the system switching risk.

[0060] In a possible embodiment, the candidate path determination strategy for the second pre-allocated power paths with the number of closed contactors being 1 for a charging gun during a single charging includes the following constraint conditions: Condition 1, preferentially select the second pre-allocated power path belonging to the power module that does not conflict with the optional power modules of other charging guns among the optional power modules of the charging gun being processed currently; Condition 2, if there are multiple non-conflicting paths, preferentially select the second pre-allocated power path belonging to the power module closest to the direct-connected power module of the charging gun being processed currently; Condition 3, preferentially select the second pre-allocated power path in which the power of the power module is less than or equal to the remaining demand power of the charging gun being processed currently.

[0061] Among them, Condition 1 is to achieve conflict avoidance. For example, if the optional first power module of the first charging gun has been occupied by the second charging gun, then this path is excluded. For example, when the third charging gun occupies the fifth power module in a star topology, the paths of other guns that involve the fifth power module conflict.

[0062] Among them, condition 2 lies in achieving distance priority. The distance refers to the physical connection of the power supply modules in the topology (for example, in a star topology, the directly connected module is the central node, and the non-directly connected modules define the distance according to the level or cable length). Modules with a shorter distance can reduce cable loss and improve the response speed.

[0063] Among them, condition 3 lies in achieving power matching. If the power of the module > the remaining demand of the charging gun, then this module cannot be fully utilized, resulting in waste of resources. Therefore, only modules with power ≤ demand are selected. For example, if the remaining demand of the gun is 50kW, a 40kW module is preferred over an 80kW power supply module.

[0064] It can be seen that in this embodiment, the first-round pre-allocation operation processes the most easily achievable paths, which may solve the demands of some charging guns and reduce the calculation pressure in subsequent rounds; and, through the allocation of conflict-free paths, unoccupied modules are reserved for subsequent rounds (such as processing paths of 2 contactors in the second round), avoiding global resource competition.

[0065] Step S420, determine whether the remaining demand power of multiple charging guns during charging under the constraints of the first-round candidate power paths and the first pre-allocation power path set is greater than zero, and whether there are unoccupied idle power supply modules among multiple power supply modules.

[0066] Among them, the remaining demand power being greater than zero indicates that some charging guns are still not satisfied after the first-round allocation, and the existence of unoccupied idle power supply modules among multiple power supply modules indicates that there are still unoccupied modules in the system, providing a resource basis for continued allocation.

[0067] Specifically, if so, execute step S430.

[0068] In a possible embodiment, the method further includes: if it is detected that the remaining demand power of the multiple charging guns during charging under the constraints of the first-round candidate power paths and the first pre-allocation power path set is equal to zero, or there are no unoccupied idle power supply modules among the multiple power supply modules, then determine the sum of the output powers of the multiple charging guns during charging under the constraints of the first-round candidate power paths and the first pre-allocation power path set; if it is detected that the sum of the output powers is greater than the sum of the output powers of the multiple charging guns in the current charging state, then merge the first-round candidate power paths and the first pre-allocation power path set into the third pre-allocation power path set; if it is detected that the sum of the output powers is not greater than the sum of the output powers of the multiple charging guns in the current charging state, then maintain the current charging state of the charging guns during charging.

[0069] Among them, detecting that the sum of the output powers is greater than the sum of the output powers in the current charging state of the charging guns during the multiple chargings is to ensure that there is redundancy in the allocated power and avoid power shortage caused by measurement errors or load fluctuations.

[0070] Among them, when it is detected that the sum of the output powers is not greater than the sum of the output powers in the current charging state of the charging guns during the multiple chargings, the system does not perform path switching, but maintains the current charging state of the charging guns being charged, avoiding invalid or harmful hardware operations, such as insufficient power after switching.

[0071] It can be seen that in this embodiment, through the power verification and state decision mechanism, a safe termination and execution guarantee are provided for the multi-round pre-allocation algorithm. Its core value lies in balancing the power demand satisfaction degree and the hardware operation cost, avoiding invalid switching through dynamic verification, and improving the system reliability and resource utilization rate.

[0072] Step S430, perform a second-round pre-allocation operation to obtain a second number of second pre-allocated power paths as the second-round candidate power paths.

[0073] Among them, for the second pre-allocated power paths in the multiple second pre-allocated power path sets where the number of closed contactors is 1 and they are not used as candidates, and the second pre-allocated power paths where the number of closed contactors is 2, perform the second-round pre-allocation operation.

[0074] In a possible embodiment, the candidate path determination strategy for the second pre-allocated power paths in the second-round pre-allocation operation includes the following constraint conditions: Condition 1, preferentially select the second pre-allocated power path belonging to the power supply module that does not conflict with the power supply modules of other charging guns being charged among the optional power supply modules of the charging gun being charged currently being processed; Condition 2, if there are multiple non-conflicting paths, preferentially select the second pre-allocated power path belonging to the power supply module closest to the directly connected power supply module of the charging gun being charged currently being processed; Condition 3, preferentially select the second pre-allocated power path where the power of the power supply module in the second pre-allocated power path is less than or equal to the remaining demand power of the charging gun being charged currently being processed.

[0075] Specifically, when specifically implementing the above three constraint conditions, for the paths where the number of closed contactors is 1 and they are not used as candidates, if they were not selected due to conflicts in the first round, such paths that do not conflict with the already allocated paths are preferentially considered in this round. The paths with 2 closed contactors are used as the second-best choice and are only enabled when the paths with 1 contactor are insufficient, in order to balance the hardware complexity and power demand.

[0076] It can be seen that in this embodiment, by further exploring available paths on the basis of the first round, both the hardware complexity is controlled and the flexibility of power distribution is improved. This progressive path expansion strategy can solve the problem of power optimization in charging stations, making the algorithm efficient and reliable in practical applications.

[0077] Step S440: Determine whether the remaining required power of multiple charging guns during charging under the constraints of the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set is greater than zero, and whether there are unoccupied idle power modules among multiple power modules.

[0078] Specifically, if so, execute step S450.

[0079] In a possible embodiment, the method further includes: if it is detected that the remaining required power of the multiple charging guns during charging under the constraints of the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set is equal to zero, or there are unoccupied idle power modules among the multiple power modules, then determine the sum of the output powers of the multiple charging guns during charging under the constraints of the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set; if it is detected that the sum of the output powers is greater than the sum of the output powers of the multiple charging guns in the current charging state, then merge the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set into the third pre-allocated power path set; if it is detected that the sum of the output powers is not greater than the sum of the output powers of the multiple charging guns in the current charging state, then maintain the current charging state of the charging guns during charging.

[0080] Among them, after each round of pre-allocation operation, it is necessary to determine whether the remaining required power is greater than zero and whether there are unoccupied idle power modules among multiple power modules, and the core concept of the processing method when not satisfied is the same.

[0081] Specifically, the judgment and processing operations after the second-round pre-allocation operation have been analyzed in detail in the part of the processing steps after the aforementioned first-round pre-allocation operation, and will not be elaborated here.

[0082] Step S450: Perform a third-round pre-allocation operation to obtain a third number of second pre-allocated power paths as the third-round candidate power paths.

[0083] Among them, for the second pre-allocated power paths in the multiple second pre-allocated power path sets with the number of closed contactors being 1 and not being used as candidates, and the second pre-allocated power paths with the number of closed contactors being 2 and not being used as candidates, and the second pre-allocated power paths with the number of closed contactors being 3, perform the third-round pre-allocation operation.

[0084] Among them, in the third round of pre-allocation operation, the aforementioned constraint conditions 1, 2, and 3 are still executed. However, in the specific process, if there is a path with the number of closed contactors being 1 and not being used as a candidate, it is preferentially enabled; when the number of paths with the number of closed contactors being 1 and not being used as candidates is insufficient, consider selecting paths with the number of closed contactors being 2 and not being used as candidates; paths with the number of closed contactors being 3 are used as the last alternative and are only used when necessary.

[0085] In a possible embodiment, the controller can also execute the fourth round, the fifth round, etc., which is not uniquely limited here.

[0086] Specifically, the number of contactors is gradually relaxed in each round. For example, in the Nth round, unselected paths with the closed number of 1 to N are processed, and the constraint conditions of conflict avoidance, distance priority, and power matching are always followed, and the termination conditions are to stop when all the charging gun requirements are met or there are no idle modules, or when the preset maximum number of rounds is reached.

[0087] It can be seen that in this embodiment, deep path expansion is performed in the final stage of multi-round pre-allocation, which not only ensures power supply in extreme scenarios but also controls the hardware operation cost through the priority strategy.

[0088] Step S460, determine whether the remaining required power of multiple charging charging guns under the constraints of the first-round candidate power path, the second-round candidate power path, the third-round pre-allocation operation, and the first pre-allocation power path set is equal to zero, or whether there are no unoccupied idle power modules among multiple power modules.

[0089] Specifically, if so, execute step S470.

[0090] Step S470, determine the sum of the output powers of multiple charging charging guns under the constraints of the first-round candidate power path, the second-round candidate power path, the third-round candidate power path, and the first pre-allocation power path set.

[0091] Among them, if the fourth round, the fifth round, or more rounds of pre-allocation operations can be executed, it is necessary to determine the sum of the output powers of multiple charging charging guns under the constraints of multiple rounds of candidate power paths and the first pre-allocation power path set.

[0092] Step S480, determine whether the sum of the output powers is greater than the sum of the output powers of multiple charging charging guns in the current charging state.

[0093] Specifically, if so, execute step S490.

[0094] In a possible embodiment, the method further includes: if it is detected that the sum of the output powers is not greater than the sum of the output powers in the current charging state of the charging guns during charging, the current charging state of the charging guns during charging is maintained.

[0095] Among them, maintaining the current charging state of the charging guns during charging avoids invalid or harmful hardware operations, such as insufficient power after switching.

[0096] Step S490, combining the first-round candidate power paths, the second-round candidate power paths, the third-round candidate power paths, and the first pre-allocated power path set into a third pre-allocated power path set.

[0097] Among them, the candidate paths (including low-complexity and high-complexity paths) selected in each round are combined with the initial direct connection path set to form a final power distribution scheme.

[0098] Furthermore, during the merging process, problems such as path conflicts and power redundancy are processed to generate executable hardware control instructions. If a certain module is selected by paths in multiple rounds, the path with a higher priority is retained (for example, a 1-contact path takes precedence over a 3-contact path); if the power of a low-priority path has been covered by a high-priority path, the low-priority path is removed.

[0099] It can be seen that in this embodiment, by establishing pre-allocated paths between the charging guns and the directly connected power modules, determining the extended paths with different numbers of closed bus coupler contactors, and dynamically scheduling the path set according to the priority strategy, the path blockage problem when multiple charging piles share a rectifier cabinet can be effectively solved, which is beneficial to improving the system power utilization rate.

[0100] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of a first-round pre-allocation operation provided by an embodiment of the present application. Among them, in terms of performing the first-round pre-allocation operation, the above method may further include the following steps: Step S510, determining the number of paths of the second pre-allocated power paths with the number of closed contactors of each charging gun during charging being 1, and obtaining a plurality of path numbers corresponding to the plurality of charging guns during charging one by one.

[0101] Among them, a single second pre-allocated power path includes the charging gun number that can form a power supply loop for the charging gun during charging, the module number of the non-directly connected power module, and the contactor number of the bus coupler contactor that needs to be closed. The number of single closed bus coupler contactors refers to the number of closed bus coupler contactors that need to be closed in the corresponding second pre-allocated power path.

[0102] Step S520: Determine the candidate path allocation priorities of the charging guns during the multiple charging processes according to the number of the multiple paths. The number of paths is negatively correlated with the candidate path allocation priorities.

[0103] Among them, the candidate path allocation priorities are used to determine the processing order of the charging guns. The charging gun with fewer paths has a higher priority, and the charging gun with restricted selection is preferentially satisfied.

[0104] In a possible embodiment, the candidate path allocation priorities include the following priorities from high to low: the first priority, the charging gun with fewer paths has a higher priority; the second priority, when the number of paths is the same, the charging gun with a larger remaining required power is preferred; the third priority, when the number of paths is the same and the remaining required power is the same, the charging gun with fewer same power module numbers as other charging guns is preferred; the fourth priority, when the number of paths is the same, the remaining required power is the same, and the number of same power module numbers as other charging guns is the same, the charging gun with a smaller gun number is preferred.

[0105] Exemplarily, there are 5 charging guns in the system, namely the first to fifth charging guns in sequence. The number of paths of the second pre-allocated power path with 1 closed contactor is 1, 2, 2, 2, 3 respectively, the remaining required powers are 80, 60, 70, 70, 50 respectively, and the number of power modules shared with other guns is 1, 2, 1, 1, 0 respectively. Then, according to the first priority, the sorting is the first charging gun, the second / third / fourth charging guns, and the fifth charging gun; for the second / third / fourth charging guns, according to the second priority, the sorting is the third / fourth charging guns, and the second charging gun; for the third / fourth charging guns, according to the third priority, it is judged that they are the same, and then according to the fourth priority, the sorting is the third charging gun and the fourth charging gun. Thus, the final processing order of the charging guns is the first charging gun, the third charging gun, the fourth charging gun, the second charging gun, and the fifth charging gun.

[0106] It can be seen that in this embodiment, through the four-layer priority rules, the system can generate a stable processing order of the charging guns in complex scenarios, which not only ensures the allocation efficiency but also avoids decision-making ambiguity through deterministic rules. It is the key mechanism that takes into account fairness and efficiency in multi-gun power allocation.

[0107] Step S530: Determine the first number of second pre-allocated power paths as the first-round candidate power paths according to the candidate path allocation priorities.

[0108] Among them, when determining the first number of second pre-allocated power paths as the first-round candidate power paths for the charging guns during the multiple charging processes according to the above processing order, it is necessary to select the most suitable power module for each charging gun based on the above constraints 1 / 2 / 3.

[0109] Further, if the second and / or third round of pre-allocation operations are required, during each round of pre-allocation operations, it is necessary to first determine the processing order of multiple charging guns based on the aforementioned four priorities, and then select a most suitable power module for each charging gun based on the above constraints 1 / 2 / 3. However, the second pre-allocation power paths involved in each round are different. For example, in the second round, it is necessary to target the second pre-allocation power paths with 1 closed contactor and not being a candidate, and the second pre-allocation power paths with 2 closed contactors. And when applying constraints 1 / 2 / 3, it is necessary to make differential adjustments according to the paths involved in the operation. For example, in the second round, the paths with 1 closed contactor are processed first, and then the paths with 2 closed contactors are considered.

[0110] It can be seen that in this embodiment, by establishing the first pre-allocation power path set of the charging gun and the directly connected power module, then determining the second pre-allocation power path set of each charging gun including different numbers of closed bus coupler contactors, then processing the above path sets according to the preset priority sorting strategy, obtaining the third pre-allocation power path set that satisfies the sum of the output powers being greater than the current state constraint, and finally updating the electrical connection relationship between the charging gun and the power module accordingly to optimize the power distribution, realizing the dynamic optimization of the power path, solving the path blockage and improving the system utilization rate.

[0111] Please refer to Figure 6 , Figure 6 which is a schematic structural diagram of a star topology provided by an embodiment of the present application. As Figure 6 shown, the star topology is the star topology structure corresponding to a rectifier cabinet with 12 inputs and 8 outputs for power switching.

[0112] Among them, the star topology includes the first power module to the twelfth power module, the first charging gun to the fourth charging gun, and multiple bus coupler contactors M1-M24. Among them, each charging gun is directly connected to a power module respectively. Specifically, the first charging gun is directly connected to the first power module, the second charging gun is directly connected to the third power module, the third charging gun is directly connected to the fifth power module, and the fourth charging gun is directly connected to the sixth power module. In this way, 4 first pre-allocation power paths are formed, obtaining the first pre-allocation power path set.

[0113] Among them, the contactor circuit can build the electrical connection relationship according to the following preset topologies: matrix topology, ring topology, cross-ring topology, and star topology.

[0114] Exemplarily, if the maximum output power of each power module is 80 Kw, and the required powers of the first to fourth charging guns are 235 KW, 200 KW, 240 KW, and 240 KW respectively, then according to the existing static allocation strategy or simple polling allocation strategy, the first / second / fourth power modules can jointly supply power to the first charging gun, the third / eleventh / twelfth power modules can jointly supply power to the second charging gun, the fifth / eighth / ninth power modules can jointly supply power to the third charging gun, and the sixth / seventh power modules can jointly supply power to the fourth charging gun. Since the tenth power module cannot be used for the fourth charging gun due to path blockage problems, the total utilization rate of the current system is (235 + 200 + 240 + 160) KW / 960 Kw ≈ 86.98%.

[0115] If the power modules are dynamically allocated according to the power distribution method of the rectifier cabinet of the charging station provided in this application, then based on the directly connected power modules, it is determined that the first charging gun - occupies the first power module - remaining required power 155 KW, the second charging gun - occupies the third power module - remaining required power 120 KW, the third charging gun - occupies the fifth power module - remaining required power 160 KW, and the fourth charging gun - occupies the sixth power module - remaining required power 160 KW.

[0116] Furthermore, for the second pre-allocated power paths with the number of closed contactors in the star topology being 1 in multiple second pre-allocated power paths, the structural schematic diagram of the star topology after the first round of pre-allocation operation can be seen Figure 7 , such as Figure 7 shown Figure 7 is the structural schematic diagram of a star topology after the first round of pre-allocation operation provided by an embodiment of this application.

[0117] Among them, the process of performing the first round of pre-allocation operation specifically includes first determining the number of paths for each charging gun to close 1 main contactor, and then the call priority can be determined based on the number of paths. The first call priority table provided below can be referred to: First Call Priority Table

[0118] Furthermore, the most suitable power module corresponding to the second pre-allocated power path is allocated to the charging gun in the order of the first call priority.

[0119] Among them, for the fourth charging gun, since the seventh / ninth power module does not conflict with the optional power modules of the first / second / third charging guns, the seventh power module with a serial number close to the sixth power module is selected. Then, it is determined that the fourth charging gun occupies the sixth / seventh power modules, and the remaining required power is 80 KW. For the third charging gun, since the second / fourth power modules overlap with the optional power modules of the first / second charging guns, the eighth power module is selected. Then, it is determined that the third charging gun occupies the fifth / eighth power modules, and the remaining required power is 80 KW. For the second charging gun, since the second / fourth / twelfth power modules all overlap with the optional power module of the first charging gun, the fourth power module with a serial number close to the third power module is selected. Then, it is determined that the second charging gun occupies the third / fourth power modules, and the remaining required power is 40 KW. For the first charging gun, since the second / twelfth power modules overlap with the second charging gun, the tenth power module is selected. Then, it is determined that the first charging gun occupies the first / tenth power modules, and the remaining required power is 75 KW.

[0120] It can be seen that in this embodiment, after the first-round pre-allocation operation, the first charging gun is allocated the first and tenth power modules, the second charging gun is allocated the third and fourth power modules, the third charging gun is allocated the fifth and eighth power modules, and the fourth charging gun is allocated the sixth and seventh power modules.

[0121] Furthermore, since the remaining required power is greater than 0 and there are unoccupied idle power modules, a second-round pre-allocation operation needs to be performed. The schematic structural diagram of the star topology after the second-round pre-allocation operation can be seen in Figure 8 , as Figure 8 shown. Figure 8 FIG. is a schematic structural diagram of the star topology after the second-round pre-allocation operation provided by the embodiment of the present application.

[0122] Among them, the process of performing the second-round pre-allocation operation specifically includes first determining the number of closed contactors of each charging gun as 1 and the second pre-allocation power paths that are not used as candidates, as well as the number of second pre-allocation power paths with the number of closed contactors as 2. Then, the call priority can be determined based on the number of paths. The second call priority table is as follows: Second Call Priority Table

[0123] Furthermore, the most suitable power module corresponding to the second pre-allocation power path is allocated to the charging gun in the order of the second call priority.

[0124] Among them, for the fourth charging gun, it is determined that the remaining required power of the fourth charging gun - occupying the sixth / seventh / ninth power module is 0 KW; for the second charging gun, since the remaining required power cannot make the second power module output at full power, this power module occupation is temporarily abandoned this round, and the remaining required power of the second charging gun - occupying the third / fourth power module is maintained at 40 KW; for the third charging gun, since the second power module overlaps with the first / second charging guns and the eleventh power module overlaps with the first charging gun, the eleventh power module is selected, and then it is determined that the remaining required power of the third charging gun - occupying the fifth / eighth / eleventh power modules is 0 KW; for the first charging gun, since the remaining required power cannot make the second or twelfth power module output at full power, this module occupation is temporarily abandoned this round, and the remaining required power of the first charging gun - occupying the first / tenth power modules is maintained at 75 KW.

[0125] It can be seen that in this embodiment, after the second-round pre-allocation operation, the first charging gun maintains the allocation to the first and tenth power modules, the second charging gun maintains the allocation to the third and fourth power modules, the third charging gun is allocated to the fifth, eighth, and eleventh power modules, and the fourth charging gun is allocated to the sixth, seventh, and ninth power modules.

[0126] Furthermore, the remaining required powers of the first and second charging guns are greater than 0 and there are idle power modules that are not occupied. Therefore, a third-round pre-allocation operation needs to be performed. The structural schematic diagram of the star topology after the third-round pre-allocation operation can be seen in Figure 9 , as Figure 9 shown, Figure 9 is the structural schematic diagram of a star topology after the third-round pre-allocation operation provided by the embodiment of the present application.

[0127] Among them, the process of performing the third-round pre-allocation operation specifically includes first determining the number of closing contactors of each charging gun that is 1 and not used as a candidate second pre-allocation power path, and, the number of closing contactors that is 2 and not used as a candidate second pre-allocation power path, and the number of second pre-allocation power paths with the number of closing contactors being 3. Then, the call priority can be determined based on the number of paths. The third call priority table provided below can be referred to: Third Call Priority Table

[0128] Furthermore, the most suitable power module corresponding to the second pre-allocation power path is allocated to the charging gun in the order of the third call priority.

[0129] Among them, for the second charging gun, it is determined that the second charging gun - occupying the third / fourth / second power module - has a remaining required power of 0 KW; for the first charging gun, it is determined that the first charging gun - occupying the first / tenth / twelfth power module - has a remaining required power of 0 KW.

[0130] It can be seen that after three rounds of pre-allocation operations, multiple third pre-allocation power path sets can be determined. Specifically, the first charging gun occupies the first, tenth, and twelfth power modules, the second charging gun occupies the third, fourth, and second power modules, the third charging gun occupies the fifth, eighth, and eleventh power modules, and the fourth charging gun occupies the sixth, seventh, and ninth power modules. Furthermore, the pre-allocation estimated system utilization rate = (235 + 200 + 240 + 240) KW / 960 Kw ≈ 95.31%. Since it is determined that the pre-allocation estimated system utilization rate > the current system utilization rate, and each gun occupies different modules and paths, the electrical connection relationship between multiple charging guns during charging and multiple power modules can be updated according to the third pre-allocation power path set.

[0131] It can be seen that in this embodiment, by establishing the first pre-allocation power path set between the charging gun and the directly connected power module, then determining the second pre-allocation power path set for each charging gun with different numbers of closed bus coupler contactors, then processing the above path sets according to the preset priority sorting strategy, obtaining the third pre-allocation power path set that satisfies the sum of output powers being greater than the current state constraint, and finally updating the electrical connection relationship between the charging gun and the power module accordingly to optimize power distribution, achieve dynamic optimization of the power path, solve path blockage, and improve system utilization rate.

[0132] Please refer to Figure 10 , Figure 10 , which is a functional unit block diagram of a power distribution system for a rectifier cabinet in a charging station provided by an embodiment of the present application. As Figure 10 shown, the system includes the following units: The processing unit 1100 is used to establish the first pre-allocation power path between each charging gun during charging among multiple charging guns and the directly connected power module, obtaining the first pre-allocation power path set; determining the second pre-allocation power path set for each charging gun during charging, obtaining multiple second pre-allocation power path sets, where a single second pre-allocation power path set includes multiple second pre-allocation power paths of a single charging gun during charging and multiple closed bus coupler contactor numbers corresponding one-to-one to the multiple second pre-allocation power paths; processing the first pre-allocation power path set and the multiple second pre-allocation power path sets according to the preset power module scheduling priority sorting strategy, obtaining the third pre-allocation power path set that satisfies the preset power sum constraint condition, where the third pre-allocation power path set includes the first pre-allocation power path set and the fourth pre-allocation power path set, and the fourth pre-allocation power path set includes the second pre-allocation power paths in the multiple second pre-allocation power path sets.

[0133] An update unit 1200 is configured to update the electrical connection relationship between the plurality of charging charging guns and the plurality of power supply modules according to the third pre-allocated power path set.

[0134] In one embodiment, in the aspect of processing the first pre-allocated power path set and the plurality of second pre-allocated power path sets according to a preset power supply module scheduling priority sorting strategy to obtain a third pre-allocated power path set that meets the preset power sum constraint condition, the processing unit 1100 is specifically configured to: for the second pre-allocated power paths in the plurality of second pre-allocated power path sets with the number of closed contactors being 1, perform a first round of pre-allocation operation to obtain a first number of second pre-allocated power paths as the first-round candidate power paths; if it is detected that the remaining required power of the plurality of charging charging guns under the constraints of the first-round candidate power paths and the first pre-allocated power path set is greater than zero, and there are unoccupied idle power supply modules among the plurality of power supply modules, then for the second pre-allocated power paths in the plurality of second pre-allocated power path sets with the number of closed contactors being 1 and not being selected as candidates, and the second pre-allocated power paths with the number of closed contactors being 2, perform a second round of pre-allocation operation to obtain a second number of second pre-allocated power paths as the second-round candidate power paths; if it is detected that the remaining required power of the plurality of charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths and the first pre-allocated power path set is greater than zero, and there are unoccupied idle power supply modules among the plurality of power supply modules, then for the second pre-allocated power paths in the plurality of second pre-allocated power path sets with the number of closed contactors being 1 and not being selected as candidates, and the second pre-allocated power paths with the number of closed contactors being 2 and not being selected as candidates, and the second pre-allocated power paths with the number of closed contactors being 3, perform a third round of pre-allocation operation to obtain a third number of second pre-allocated power paths as the third-round candidate power paths; if it is detected that the remaining required power of the plurality of charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths, the third-round pre-allocation operation and the first pre-allocated power path set is equal to zero, or there are no unoccupied idle power supply modules among the plurality of power supply modules, then determine the sum of the output powers of the plurality of charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths, the third-round candidate power paths and the first pre-allocated power path set; if it is detected that the sum of the output powers is greater than the sum of the output powers of the plurality of charging charging guns in the current charging state, then merge the first-round candidate power paths, the second-round candidate power paths, the third-round candidate power paths and the first pre-allocated power path set into the third pre-allocated power path set.

[0135] In one embodiment, in the aspect of processing the first pre-allocated power path set and the multiple second pre-allocated power path sets according to a preset power module scheduling priority sorting strategy to obtain a third pre-allocated power path set that meets the preset power sum constraint condition, the processing unit 1100 is further configured to: if it is detected that the remaining required power of the multiple charging guns under the constraints of the first-round candidate power path and the first pre-allocated power path set is equal to zero, or there are no unoccupied idle power modules among the multiple power modules, determine the sum of the output powers of the multiple charging guns under the constraints of the first-round candidate power path and the first pre-allocated power path set; if it is detected that the sum of the output powers is greater than the sum of the output powers of the multiple charging guns in the current charging state, merge the first-round candidate power path and the first pre-allocated power path set into the third pre-allocated power path set; if it is detected that the sum of the output powers is not greater than the sum of the output powers of the multiple charging guns in the current charging state, maintain the current charging state of the charging guns.

[0136] In one embodiment, in the aspect of processing the first pre-allocated power path set and the multiple second pre-allocated power path sets according to a preset power module scheduling priority sorting strategy to obtain a third pre-allocated power path set that meets the preset power sum constraint condition, the processing unit 1100 is further configured to: if it is detected that the remaining required power of the multiple charging guns under the constraints of the first-round candidate power path, the second-round candidate power path and the first pre-allocated power path set is equal to zero, or there are unoccupied idle power modules among the multiple power modules, determine the sum of the output powers of the multiple charging guns under the constraints of the first-round candidate power path, the second-round candidate power path and the first pre-allocated power path set; if it is detected that the sum of the output powers is greater than the sum of the output powers of the multiple charging guns in the current charging state, merge the first-round candidate power path, the second-round candidate power path and the first pre-allocated power path set into the third pre-allocated power path set; if it is detected that the sum of the output powers is not greater than the sum of the output powers of the multiple charging guns in the current charging state, maintain the current charging state of the charging guns.

[0137] In one embodiment, in terms of the first-round pre-allocation operation, the processing unit 1100 is specifically configured to: determine the number of paths of the second pre-allocation power paths where the number of closed contactors of each charging gun during charging is 1, so as to obtain a plurality of path numbers corresponding to the plurality of charging guns during charging one by one; determine the candidate path allocation priorities of the plurality of charging guns during charging according to the plurality of path numbers, and there is a negative correlation between the path number and the candidate path allocation priority; determine the first number of second pre-allocation power paths as the first-round candidate power paths according to the candidate path allocation priorities.

[0138] In one embodiment, in terms of updating the electrical connection relationship between the plurality of charging guns during charging and the plurality of power supply modules according to the third pre-allocation power path set, the updating unit 1200 is specifically configured to: release the power supply modules and bus coupler contactors of the plurality of charging guns during charging except for the directly connected power supply modules; sequentially turn on the power supply modules and bus coupler contactors belonging to the charging guns during charging in the fourth pre-allocation power path set.

[0139] It can be seen that in this embodiment, by establishing the first pre-allocation power path set between the charging gun and the directly connected power supply module, then determining the second pre-allocation power path set of each charging gun including different numbers of closed bus coupler contactors, then processing the above path sets according to the preset priority sorting strategy, obtaining the third pre-allocation power path set whose sum of output powers is greater than the current state constraint, and finally updating the electrical connection relationship between the charging gun and the power supply module accordingly, so as to optimize power distribution, realize dynamic optimization of power paths, solve path blockage and improve system utilization rate.

[0140] In addition, an embodiment of the present application further provides a computer storage medium, which stores a computer program that can be loaded and executed by a processor, such as the power distribution method of the rectifier cabinet of the charging station as described above. The computer-readable storage medium includes, for example: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0141] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0142] In several embodiments provided by the present application, it should be understood that the disclosed methods, devices, and systems can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0143] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, the functional units in various embodiments of the present invention can be integrated in a processing unit, or each unit can be physically included separately, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of a combination of hardware and software functional units.

[0144] The integrated unit implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute some steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, mobile hard disks, magnetic disks, optical disks, volatile memories, or non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchlink dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM), etc., all of which are media that can store program code.

[0145] In the above embodiments, the descriptions of the various embodiments each have their own emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0146] The embodiments of the present application have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

[0147] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can easily conceive of changes or substitutions without departing from the spirit and scope of the present application, and can make various changes and modifications, including combinations of the above different functions and implementation steps, including software and hardware implementation manners, all within the protection scope of the present application.

Claims

1. A power distribution method for a rectifier cabinet of a charging station, characterized in that, A rectifier cabinet controller applied to a charging station, the charging station includes a plurality of power modules, a rectifier cabinet, and a plurality of charging guns. The plurality of power modules are electrically connected to the rectifier cabinet, and the rectifier cabinet is electrically connected to the plurality of charging guns. The rectifier cabinet includes the rectifier cabinet controller and a contactor circuit. The contactor circuit includes a plurality of bus coupler contactors that are electrically connected according to a preset topology. The method includes: Establish a first pre-allocated power path between each charging gun in the plurality of charging guns and the directly connected power module, and obtain a first pre-allocated power path set; Determine a second pre-allocated power path set for each charging gun in the plurality of charging guns, and obtain a plurality of second pre-allocated power path sets. A single second pre-allocated power path set includes a plurality of second pre-allocated power paths of a single charging gun and a plurality of closed bus coupler contactor numbers corresponding one-to-one to the plurality of second pre-allocated power paths; Process the first pre-allocated power path set and the plurality of second pre-allocated power path sets according to a preset power module scheduling priority sorting strategy, and obtain a third pre-allocated power path set that satisfies the preset power sum constraint condition. The third pre-allocated power path set includes the first pre-allocated power path set and a fourth pre-allocated power path set. The fourth pre-allocated power path set includes the second pre-allocated power paths in the plurality of second pre-allocated power path sets; Update the electrical connection relationship between the plurality of charging guns and the plurality of power modules according to the third pre-allocated power path set.

2. The method according to claim 1, characterized in that The process of processing the first pre-allocated power path set and the plurality of second pre-allocated power path sets according to a preset power module scheduling priority sorting strategy to obtain a third pre-allocated power path set that satisfies the preset power sum constraint condition includes: For the second pre-allocated power paths in the plurality of second pre-allocated power path sets with the number of closed contactors being 1, perform a first round of pre-allocation operation to obtain a first number of second pre-allocated power paths as the first round of candidate power paths; If it is detected that the remaining required power of the plurality of charging guns under the constraints of the first round of candidate power paths and the first pre-allocated power path set is greater than zero, and there are unoccupied idle power modules among the plurality of power modules, then for the second pre-allocated power paths in the plurality of second pre-allocated power path sets with the number of closed contactors being 1 and not being selected as candidates, and the second pre-allocated power paths with the number of closed contactors being 2, perform a second round of pre-allocation operation to obtain a second number of second pre-allocated power paths as the second round of candidate power paths; If it is detected that the remaining required power of the multiple charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set is greater than zero, and there are unoccupied idle power modules among the multiple power modules, then for the second pre-allocated power paths with the number of closed contactors being 1 and not being candidates, the second pre-allocated power paths with the number of closed contactors being 2 and not being candidates, and the second pre-allocated power paths with the number of closed contactors being 3, perform a third-round pre-allocation operation to obtain a third number of second pre-allocated power paths as the third-round candidate power paths; If it is detected that the remaining required power of the multiple charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths, the third-round pre-allocation operation, and the first pre-allocated power path set is equal to zero, or there are no unoccupied idle power modules among the multiple power modules, then determine the sum of the output powers of the multiple charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths, the third-round candidate power paths, and the first pre-allocated power path set; If it is detected that the sum of the output powers is greater than the sum of the output powers of the multiple charging charging guns in the current charging state, then merge the first-round candidate power paths, the second-round candidate power paths, the third-round candidate power paths, and the first pre-allocated power path set into the third pre-allocated power path set.

3. The method according to claim 2, wherein The method further includes: If it is detected that the remaining required power of the multiple charging charging guns under the constraints of the first-round candidate power paths and the first pre-allocated power path set is equal to zero, or there are no unoccupied idle power modules among the multiple power modules, then determine the sum of the output powers of the multiple charging charging guns under the constraints of the first-round candidate power paths and the first pre-allocated power path set; If it is detected that the sum of the output powers is greater than the sum of the output powers of the multiple charging charging guns in the current charging state, then merge the first-round candidate power paths and the first pre-allocated power path set into the third pre-allocated power path set; If it is detected that the sum of the output powers is not greater than the sum of the output powers of the multiple charging charging guns in the current charging state, then maintain the current charging state of the charging charging guns.

4. The method according to claim 2 or 3, characterized in that, The method further includes: If it is detected that the remaining required power of the multiple charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set is equal to zero, or there are unoccupied idle power modules among the multiple power modules, then determine the sum of the output powers of the multiple charging charging guns under the constraints of the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set; If it is detected that the sum of the output powers is greater than the sum of the output powers of the plurality of charging guns in the current charging state, then merge the first-round candidate power paths, the second-round candidate power paths, and the first pre-allocated power path set into the third pre-allocated power path set; If it is detected that the sum of the output powers is not greater than the sum of the output powers of the plurality of charging guns in the current charging state, then maintain the current charging state of the charging guns being charged.

5. The method according to claim 2, wherein The first-round pre-allocation operation includes the following processing steps: Determine the number of paths of the second pre-allocated power paths with the number of closed contactors of each charging gun being 1, and obtain a plurality of path numbers corresponding one-to-one to the plurality of charging guns being charged; Determine the candidate path allocation priorities of the plurality of charging guns being charged according to the plurality of path numbers, and there is a negative correlation between the path number and the candidate path allocation priority; Determine the first number of second pre-allocated power paths as the first-round candidate power paths according to the candidate path allocation priorities.

6. The method according to claim 5, characterized in that, The candidate path determination strategy of the second pre-allocated power path with the number of closed contactors of a single charging gun being 1 includes the following constraint conditions: Condition 1: Prioritize selecting the second pre-allocated power path belonging to the power supply module that does not conflict with the power supply modules of other charging guns among the optional power supply modules of the charging gun being currently processed; Condition 2: If there are multiple non-conflicting paths, prioritize selecting the second pre-allocated power path belonging to the power supply module closest to the directly connected power supply module of the charging gun being currently processed; Condition 3: Prioritize selecting the second pre-allocated power path in which the power of the power supply module is less than or equal to the remaining demand power of the charging gun being currently processed.

7. The method according to claim 1 or 2, characterized in that, The updating of the electrical connection relationship between the plurality of charging guns being charged and the plurality of power supply modules according to the third pre-allocated power path set includes: Release the power supply modules and the bus coupler contactors other than the directly connected power supply modules of the plurality of charging guns being charged; Sequentially turn on the power supply modules and the bus coupler contactors belonging to the charging guns being charged in the fourth pre-allocated power path set.

8. The method according to claim 1 or 2, characterized in that The preset topology includes any one of the following: matrix topology, ring topology, cross-ring topology, and star topology.

9. The method according to claim 1 or 2, characterized in that The directly connected power supply module refers to the power supply module directly electrically connected to the charging gun being charged among the plurality of power supply modules; A single second pre-allocated power path includes the charging gun serial number capable of forming a power supply loop for the charging gun being charged, the module serial number of the non-directly connected power supply module, and the contactor serial number of the bus coupler contactor that needs to be closed. The number of single closed bus coupler contactors refers to the number of closed bus coupler contactors that need to be closed in the corresponding second pre-allocated power path; The preset power sum constraint condition means that the sum of the output powers of the multiple power supply modules called in the third pre-allocated power path set is greater than the sum of the output powers of the plurality of charging guns being charged in the current charging state.

10. A power distribution system for a rectifier cabinet of a charging station, characterized in that, Multiple power modules, a rectifier cabinet, and multiple charging guns. The multiple power modules are electrically connected to the rectifier cabinet, and the rectifier cabinet is electrically connected to the multiple charging guns. The rectifier cabinet includes a rectifier cabinet controller and a contactor circuit. The contactor circuit includes multiple bus coupler contactors that build an electrical connection relationship according to a preset topology. Among them, The rectifier cabinet controller is configured to execute the steps in any one of the methods of claims 1-9.

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