Power distribution method, system and equipment of charging and discharging system and medium

Abstract

The invention relates to the technical field of electric vehicle charging and discharging, and discloses a power distribution method, system and equipment of a charging and discharging system and a medium, and the type of the charging and discharging system is determined according to the number and connection relation of terminals and system cabinets. The type of the charging and discharging system is a single-terminal cross-cabinet parallel system, and the number of power modules required by the target power distribution unit is adjusted according to the rated power of the power modules distributed by the power distribution units, the total required power of the single terminals and the initial required power of the single terminals to the target power distribution unit. And adjusting the output power of the power module required by each power distribution unit on the basis of the rated power of the power module distributed by the target power distribution unit and the adjusted number of the power modules required by the target power distribution unit under the condition that the total required power of the single terminal is met. The minimum number of power modules can be called under the condition that the power supply requirement of a single terminal is ensured, so that the power utilization rate of the charging and discharging system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging and discharging, and in particular to a power distribution method, system, equipment and medium of a charging and discharging system. Background Art

[0002] As the demand for electric vehicle charging grows, charging and discharging systems are widely used. Common cross-cabinet parallel group charging systems include: multiple system cabinets, power modules, power distribution units (PDUs) and charging terminals.

[0003] At present, the power distribution of the charging and discharging system is often distributed in proportion to the output capacity of the power distribution unit. The power allocated to each power distribution unit is evenly divided according to the number of power modules allocated to it, so as to determine the actual output power of each power module. According to this distribution method, the actual output power of each power module is less than its rated power, resulting in a large number of modules being called and insufficient utilization of the power of the charging and discharging system.

[0004] It can be seen that how to improve the power utilization of the charging and discharging system is a problem that technical personnel in this field need to solve. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a power distribution method, system, device and medium for a charging and discharging system, which can improve the power utilization of the charging and discharging system.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a power distribution method of a charging and discharging system, comprising:

[0007] Determine the type of charging and discharging system based on the number and connection relationship between terminals and system cabinets;

[0008] When the charging and discharging system type is a single-terminal cross-cabinet parallel system, the number of power modules required by the target power distribution unit is adjusted according to the rated power of the power modules allocated by each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal to the target power distribution unit; wherein the initial required power of the target power distribution unit is the required power after the initial allocation based on the total required power of the single terminal;

[0009] When the total power requirement of the single terminal is met, the output power of the power modules required by each power allocation unit is adjusted based on the rated power of the power modules allocated by the target power allocation unit and the number of power modules required by the adjusted target power allocation unit.

[0010] On the one hand, according to the rated power of the power modules allocated by each power allocation unit, the total required power of the single terminal, and the initial required power of the single terminal for the target power allocation unit, adjusting the number of power modules required for the target power allocation unit includes:

[0011] According to the total power demand of the single terminal, the initial power demand of the single terminal for the target power allocation unit, and the rated power of the power module allocated to each power allocation unit, adjusting the actual power demand of the single terminal for each power allocation unit;

[0012] Based on the actual power demand of the single terminal for each power allocation unit and the rated power of the power modules allocated by each power allocation unit, the number of power modules required for each power allocation unit is adjusted.

[0013] On the one hand, based on the actual power demand of the single terminal for each power allocation unit and the rated power of the power modules allocated by each power allocation unit, adjusting the number of power modules required for each power allocation unit includes:

[0014] Performing a modulo operation on the actual power demanded by the single terminal for the target power allocation unit and the rated power of the target power module to obtain a quotient and a remainder;

[0015] When the remainder is zero, the quotient is used as the target number of power modules;

[0016] When the remainder is not zero, the quotient is increased by one as the target number of power modules.

[0017] On the one hand, in the case of meeting the total required power of the single terminal, based on the rated power of the power module allocated by the target power allocation unit and the number of power modules required by the adjusted target power allocation unit, adjusting the output power of the power module required by each power allocation unit includes:

[0018] When the target power distribution unit is not the last power distribution unit, the output power of each power module required after the target power distribution unit is adjusted is adjusted to the rated power;

[0019] When the target power allocation unit is the last power allocation unit, the remaining required power of the single terminal is determined based on the total required power of the single terminal and the output power provided to the single terminal by other power allocation units; the output power of each power module required after the last power allocation unit is adjusted is determined based on the remaining required power of the single terminal and the number of power modules required after adjustment of the last power allocation unit.

[0020] On the one hand, determining the remaining required power of the single terminal according to the total required power of the single terminal and the output power provided to the single terminal by other power allocation units includes:

[0021] Determine the output power provided by other power distribution units to the single terminal according to the number of target power modules connected to other power distribution units and the rated power of the target power modules; wherein the other power distribution units are the remaining power distribution units except the last power distribution unit among all power distribution units supplying power to the single terminal;

[0022] The difference between the total required power of the single terminal and the output power provided to the single terminal by other power allocation units is taken as the remaining required power of the single terminal.

[0023] The embodiment of the present invention also provides a power distribution method of a charging and discharging system, comprising:

[0024] Determine the type of charging and discharging system based on the number and connection relationship between terminals and system cabinets;

[0025] When the charging and discharging system type is a single system cabinet multi-terminal system, the required power of each terminal is respectively modulo the rated power of the power module in the single system cabinet to obtain the remainder corresponding to each terminal;

[0026] In ascending order of remainders, the actual number of power modules required by the target terminal for the single system cabinet is reduced one by one, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power, until the actual number of power modules required by all terminals for the single system cabinet is equal to the number of available modules of the single system cabinet, then the operation is terminated.

[0027] On the one hand, in the order of ascending remainders, the actual number of power modules required by the target terminal for the single system cabinet is reduced one by one, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power until the actual number of power modules required by all terminals for the single system cabinet is equal to the number of available modules, and then the operation is terminated, including:

[0028] The difference between the actual required number and the available number of modules is used as the number of power modules to be reduced;

[0029] According to the order of the remainder from small to large, the number of power modules corresponding to each target terminal is reduced by one in turn until the number of reduced power modules reaches the number of power modules to be reduced, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power.

[0030] The embodiment of the present invention also provides a power distribution method of a charging and discharging system, comprising:

[0031] Determine the type of charging and discharging system based on the number and connection relationship between terminals and system cabinets;

[0032] When the charging and discharging system type includes both a single-terminal cross-cabinet parallel system and a single-system cabinet multi-terminal system, the cross-cabinet parallel terminal is used as a cross-cabinet terminal, and the number of power modules required for each power distribution unit is adjusted according to the rated power of the power module allocated to each power distribution unit, the total required power of the cross-cabinet terminal, and the initial required power of the cross-cabinet terminal for each power distribution unit; wherein the initial required power of each power distribution unit is the required power after initial allocation based on the total required power of the cross-cabinet terminal; when the total required power of the cross-cabinet terminal is met, the output power of the power module required for each power distribution unit is adjusted based on the rated power of the power module allocated to each power distribution unit and the adjusted number of power modules required for each power distribution unit;

[0033] Perform modulo operation on the required power of each terminal and the rated power of the power module in the target system cabinet to obtain the remainder corresponding to each terminal; wherein the target system cabinet is any one of the system cabinets; in ascending order of the remainders, reduce the actual required number of power modules in the target system cabinet required by the target terminal one by one, and adjust the output power of the power module currently actually connected to the target terminal to the rated power, until the actual required number of power modules in the target system cabinet by all terminals is equal to the number of available modules in the target system cabinet.

[0034] The embodiment of the present invention further provides a charging and discharging system, comprising a monitoring module, wherein the monitoring module comprises a determining unit and an adjusting unit;

[0035] The determination unit is used to determine the type of charging and discharging system according to the number and connection relationship between the terminals and the system cabinets;

[0036] The adjustment unit is used to adjust the number of power modules required for the target power distribution unit according to the rated power of the power modules allocated to each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal to the target power distribution unit when the charging and discharging system type is a single-terminal cross-cabinet parallel system; wherein the initial required power of the target power distribution unit is the required power after initial allocation based on the total required power of the single terminal; and when the total required power of the single terminal is met, the output power of the power modules required by each power distribution unit is adjusted based on the rated power of the power modules allocated by the target power distribution unit and the adjusted number of power modules required by the target power distribution unit.

[0037] The embodiment of the present invention further provides a power distribution device of a charging and discharging system, comprising:

[0038] Memory for storing computer programs;

[0039] A processor is used to execute the computer program to implement the steps of the power allocation method of the charging and discharging system.

[0040] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the power allocation method of the charging and discharging system are implemented.

[0041] It can be seen from the above technical scheme that the type of charging and discharging system is determined according to the number and connection relationship between the terminal and the system cabinet. The type of charging and discharging system is a single-terminal cross-cabinet parallel system. When the output power of the power module is closer to its rated power, the number of power modules required is less. Therefore, the number of power modules required for the target power distribution unit can be adjusted according to the rated power of the power modules allocated by each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal to the target power distribution unit; wherein, the initial required power of the target power distribution unit is the required power after the initial allocation of the total required power of the single terminal. In order to improve the utilization rate of the power of the charging and discharging system, under the condition of meeting the total required power of the single terminal, the output power of the power module required by each power distribution unit is adjusted based on the rated power of the power module allocated by the target power distribution unit and the number of power modules required by the adjusted target power distribution unit. The traditional scheme allocates power in proportion to the output capacity of the power distribution unit. The present invention adjusts the number of power modules required for each power distribution unit based on the initial allocation of the total required power of the single terminal to determine the initial required power of the power distribution unit, combined with the rated power of each power module. Under the premise of ensuring that the total power demand of a single terminal remains unchanged, the output power of each power module is further adjusted. Compared with the traditional method, the present invention can call the minimum number of power modules while ensuring the power supply demand of a single terminal, thereby improving the power utilization of the charging and discharging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] FIG1 is a schematic diagram of the architecture of a single-terminal cross-cabinet parallel system provided by an embodiment of the present invention;

[0044] FIG2 is a flow chart of a power distribution method applicable to a single-terminal cross-cabinet parallel system provided by an embodiment of the present invention;

[0045] 3 is a schematic diagram of adjusting the output power and number of power modules in a single-terminal cross-cabinet parallel system provided by an embodiment of the present invention;

[0046] FIG4 is a flow chart of a power distribution method applicable to a single system cabinet multi-terminal system provided by an embodiment of the present invention;

[0047] FIG5 is a schematic diagram of the architecture of a single system cabinet multi-terminal system provided by an embodiment of the present invention;

[0048] 6 is a schematic diagram of adjusting the output power and number of power modules in a single system cabinet multi-terminal system according to an embodiment of the present invention;

[0049] FIG7 is a schematic diagram of a composite charging and discharging system with parallel output of power distribution units provided by an embodiment of the present invention;

[0050] FIG8 is a flow chart of a power distribution method applicable to a hybrid charging and discharging system provided by an embodiment of the present invention;

[0051] 9 is a schematic structural diagram of a hybrid charging and discharging system including both a single-terminal cross-cabinet parallel system and a single-system cabinet multi-terminal system provided by an embodiment of the present invention;

[0052] FIG10 is a schematic diagram of the structure of a charging and discharging system provided by an embodiment of the present invention;

[0053] FIG. 11 is a structural diagram of a power distribution device of a charging and discharging system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] Figure 1 is a schematic diagram of the architecture of a single-terminal cross-cabinet parallel system provided by an embodiment of the present invention. The single terminal in Figure 1 takes a charging terminal as an example, and the single-terminal cross-cabinet parallel system includes multiple system cabinets, power modules, power distribution units and charging terminals. The system cabinet can also be called a charging cabinet, and a single charging cabinet contains several power modules and several PDUs. Figure 1 takes the example that each system cabinet contains four PDUs and four power modules. For the sake of convenience in distinguishing, the four PDUs under each system cabinet can be referred to as PDU1, PDU2, PDU3 and PDU1, respectively, and the four power modules can be referred to as module 1, module 2, module 3 and module 4, respectively. Multiple PDUs can be connected to the same charging terminal to form a cross-cabinet parallel charging system.

[0057] Assuming that the rated power of each power module is 20KW, a charging terminal requires 210KW of power. The charging terminal is connected to four PDUs of different system cabinets, namely PDU1 to PDU4. The output capacity ratios of these four PDUs are 4:3:2:3. Therefore, PDU1 needs to allocate 70KW, PDU2 needs to allocate 52.5KW, PDU3 needs to allocate 35KW, and PDU4 needs to allocate 52.5KW. A total of 12 power modules are required, and the output power of each power module is 210 / 12=17.5KW. As can be seen from Figure 1, the way of allocating power according to the output capacity of the PDU will cause the actual output power of each power module to be less than its rated power, resulting in a large number of modules being called and insufficient utilization of the power of the charging and discharging system.

[0058] Next, a power distribution method for a charging and discharging system provided by an embodiment of the present invention is described in detail. FIG2 is a flow chart of a power distribution method for a single-terminal cross-cabinet parallel system provided by an embodiment of the present invention, the method comprising:

[0059] S201: Determine the type of charging and discharging system according to the number and connection relationship between the terminals and the system cabinets.

[0060] A system cabinet can contain multiple power distribution units (PDUs) and multiple power modules. The power distribution unit can be connected to a terminal to supply power to the terminal. In the discharge scenario, the power module can be a bidirectional AC / DC module or a bidirectional DC / DC module.

[0061] In practical applications, the output power provided by each power distribution unit to the terminal is adjusted by adjusting the number of power modules distributed by each power distribution unit.

[0062] According to the charging and discharging methods supported by the terminal, the terminal can be a charging terminal, a charging and discharging terminal, or both. According to the cooling method of the terminal, the terminal can be a liquid cooling terminal or an air cooling terminal, etc.

[0063] Common types of charging and discharging systems include a single-terminal cross-cabinet parallel system, a single-system cabinet multi-terminal system, and a hybrid system that includes both a single-terminal cross-cabinet parallel system and a single-system cabinet multi-terminal system. Among them, a single-terminal cross-cabinet parallel system refers to at least one terminal being connected in parallel with PDUs in multiple system cabinets. A single-system cabinet multi-terminal system refers to a system cabinet in which multiple PDUs are connected to multiple terminals respectively. Therefore, in an embodiment of the present invention, the type of charging and discharging system can be determined based on the number and connection relationship between the terminal and the system cabinet.

[0064] S202: When the charging and discharging system type is a single-terminal cross-cabinet parallel system, adjust the number of power modules required for the target power distribution unit according to the rated power of the power modules allocated to each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal for the target power distribution unit.

[0065] When the charging and discharging system type is a single-terminal cross-cabinet parallel system, the actual power demand of the terminal for each system cabinet can be adjusted to make the output power of each power module in the system cabinet that supplies power to the terminal as close to the rated power of the power module as possible, so that the terminal can call the minimum number of power modules when the total power demand is met, thereby improving the power utilization of the charging and discharging system. This adjustment method can be regarded as a minimum power module quantity strategy, that is, calling the minimum number of power modules when the total power demand of the terminal is met.

[0066] Figure 1 shows an example of a charging terminal connected to four system cabinets, each of which contains four PDUs and four power modules. Each system cabinet can supply power to the terminal through the PDU to meet the charging needs of the terminal. Figure 1 shows an example of PDU1 in each system cabinet supplying power to the terminal.

[0067] It should be noted that the number of PDUs and power modules contained in each system cabinet in Figure 1 is for example only. In actual applications, each system cabinet may contain a greater or lesser number of PDUs and power modules, and the connection method between the power modules and PDUs may be full matrix, partial matrix, bus, ring or triangular cone, and there is no limitation on this.

[0068] Considering that there are multiple power distribution units connected to a single terminal in a single-terminal cross-cabinet parallel system, the number of power modules allocated to each power distribution unit and the adjustment method of the output power are similar. For the sake of convenience, any power distribution unit among all power distribution units, namely the target power distribution unit, is taken as an example for explanation.

[0069] Among them, the initial required power of the target power distribution unit can be the required power after initial allocation according to the total required power of the single terminal. The initial allocation can be divided equally or proportionally. The proportional allocation can be the ratio of the total required power of a single terminal to the allocated power of all power distribution units connected to the terminal to the ratio of the available power of all power distribution units. In the actual single-terminal cross-cabinet parallel application scenario, the proportion of each power distribution unit can be determined based on the output capacity of each power distribution unit connected to the terminal.

[0070] Taking proportional allocation as an example, assuming that the total power demand of a single terminal is 210 kilowatts (kw), and the single terminal is connected to four power allocation units respectively, and the power demand ratio of each power allocation unit is 4:3:2:3. The initial power demand of the single terminal for the first power allocation unit is 210 / (4+3+2+3)*4=70kw, the initial power demand of the single terminal for the second power allocation unit is 210 / (4+3+2+3)*3=52.5kw, the initial power demand of the single terminal for the third power allocation unit is 210 / (4+3+2+3)*2=35kw, and the initial power demand of the single terminal for the fourth power allocation unit is 210 / (4+3+2+3)*3=52.5kw.

[0071] Assume that the rated power of the power modules allocated by the power distribution unit is 20kw. Taking 4+3+2+3=12 power modules as an example, the output power of each power module in the initial state is 210 / 12=17.5kw. Obviously, the output power of each power module cannot reach its rated power, which will cause the utilization rate of each power module to be low.

[0072] According to the total power demand of the single terminal, the initial power demand of the single terminal for the target power allocation unit, and the rated power of the power modules allocated to each power allocation unit, the actual power demand of the single terminal for each power allocation unit is adjusted. Based on the actual power demand of the single terminal for each power allocation unit and the rated power of the power modules allocated to each power allocation unit, the number of power modules required for each power allocation unit is adjusted.

[0073] The adjustment method of the number of power modules required by each power distribution unit is similar, and the target power distribution unit is used as an example for description. In order to distinguish the power modules allocated by the target power distribution unit from those allocated by other power distribution units, the power modules allocated by the target power distribution unit can be called target power modules.

[0074] In actual application scenarios, a single terminal can perform a modulus operation on the actual required power of the target power allocation unit and the rated power of the target power module to obtain a quotient and a remainder; if the remainder is zero, the quotient is used as the target number of power modules. If the remainder is not zero, the quotient plus one is used as the target number of power modules.

[0075] Combined with the above example of proportional allocation, the initial power demand of a single terminal for the first power allocation unit is 70kw, and the rated power of the power module allocated by the first power allocation unit is 20kw. In order to meet the initial power demand of the single terminal for the first power allocation unit, the first power allocation unit requires at least 4 power modules to supply power to the single terminal. If these 4 power modules can all reach the rated power, the output power of the 4 power modules is 20*4=80kw. Therefore, the actual power demand of the single terminal for the first power allocation unit can be adjusted to 80kw, and the number of power modules required for the first power allocation unit is 80 / 20=4. By analogy, the actual power demand of the single terminal for the second power allocation unit can be adjusted to 60kw, and the number of power modules required for the second power allocation unit is 60 / 20=3. The actual power demand of the single terminal for the third power allocation unit is adjusted to 40kw, and the number of power modules required for the third power allocation unit is 40 / 20=2. The actual power requirement of the single terminal for the fourth power distribution unit is adjusted to 210-80-60-40=30kw. The number of power modules required for the fourth power distribution unit is 30 / 20, the quotient is 1, and the remainder is 10, so the number of power modules required for the fourth power distribution unit is 2.

[0076] S203: When the total power requirement of a single terminal is met, the output power of the power modules required by each power allocation unit is adjusted based on the rated power of the power modules allocated by the target power allocation unit and the adjusted number of power modules required by the target power allocation unit.

[0077] After adjusting the number of power modules required by the target power allocation unit, the output power of the power modules required by each power allocation unit can be adjusted based on the rated power of the power modules allocated by the target power allocation unit and the adjusted number of power modules required by the target power allocation unit while meeting the total power requirement of a single terminal.

[0078] Considering that the closer the output power of a power module is to the rated power, the higher the utilization rate of the power module is. Therefore, when adjusting the output power of the power module, make it as close to the rated power as possible. However, if the power distribution unit that supplies power to a single terminal is the last power distribution unit, due to the increase in the output power provided to the single terminal by other power distribution units, the actual power demand of the single terminal for the last power distribution unit is often lower than the initial power demand. Therefore, the adjustment methods of the output power of the power modules under the last power distribution unit and other power distribution units can be distinguished.

[0079] In the embodiment of the present invention, when the target power distribution unit is not the last power distribution unit, the output power of each power module required after the target power distribution unit is adjusted may be adjusted to the rated power.

[0080] When the target power allocation unit is the last power allocation unit, the remaining power requirement of the single terminal can be determined based on the total power requirement of the single terminal and the output power provided to the single terminal by other power allocation units. The output power of each power module required after the last power allocation unit is adjusted is determined based on the remaining power requirement of the single terminal and the number of power modules required after the last power allocation unit is adjusted.

[0081] For determining the remaining required power of a single terminal, the output power provided by other power allocation units to the single terminal can be determined based on the number of target power modules connected to other power allocation units and the rated power of the target power modules. The difference between the total required power of the single terminal and the output power provided by other power allocation units to the single terminal is taken as the remaining required power of the single terminal. Among them, the other power allocation units are the remaining power allocation units except the last power allocation unit among all the power allocation units supplying power to the single terminal.

[0082] Figure 3 is a schematic diagram of adjusting the output power and number of power modules in a single-terminal cross-cabinet parallel system provided by an embodiment of the present invention. The schematic diagram on the upper side of Figure 3 is a schematic diagram of the power distribution unit of each system cabinet supplying power to the terminal in the initial state. The total power demand of the single terminal is 210kw. In the initial state, according to the ratio of 4:3:2:3, the initial power demand of the single terminal for each power distribution unit is determined to be 70kw, 52.5kw, 35kw and 52.5kw respectively. The output power of each power module is 17.5kw, and the number of power modules required is 4, 3, 2 and 3 respectively, requiring a total of 12 power modules. The schematic diagram on the lower side of Figure 3 is a schematic diagram of the power distribution unit of each system cabinet supplying power to the terminal after adjustment according to the minimum number of power modules strategy. After adjustment, the actual power demand of the single terminal for each power distribution unit is 80kw, 60kw, 40kw and 30kw respectively, and the number of power modules required is 4, 3, 2 and 2 respectively. After adjustment, the output power of the power modules required by the first three power distribution units is set to 20kw. The fourth power distribution unit is the last power distribution unit. At this time, the remaining required power of the single terminal is 210-20*4-20*3-20*2=30kw. The output power of the power module required by the fourth power distribution unit can be adjusted to 30 / 2=15kw.

[0083] As can be seen from Figure 3, before the adjustment, a total of 12 power modules are needed to supply power to a single terminal. After the adjustment, only 11 power modules are needed to complete the power supply to a single terminal while meeting the total power demand of the single terminal. According to the minimum power module quantity strategy provided by the embodiment of the present invention, the minimum number of power modules can be called while meeting the total power demand of a single terminal, and the output power of most power modules is made as close to their rated power as possible, which effectively solves the problem of insufficient utilization of the rated power of the power modules and improves the utilization of the power of the charging and discharging system.

[0084] It can be seen from the above technical scheme that the type of charging and discharging system is determined according to the number and connection relationship between the terminal and the system cabinet. The type of charging and discharging system is a single-terminal cross-cabinet parallel system. When the output power of the power module is closer to its rated power, the number of power modules required is less. Therefore, the number of power modules required for the target power distribution unit can be adjusted according to the rated power of the power modules allocated by each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal to the target power distribution unit; wherein, the initial required power of the target power distribution unit is the required power after the initial allocation of the total required power of the single terminal. In order to improve the utilization rate of the power of the charging and discharging system, under the condition of meeting the total required power of the single terminal, the output power of the power module required by each power distribution unit is adjusted based on the rated power of the power module allocated by the target power distribution unit and the number of power modules required by the adjusted target power distribution unit. The traditional scheme allocates power in proportion to the output capacity of the power distribution unit. The present invention adjusts the number of power modules required for each power distribution unit based on the initial allocation of the total required power of the single terminal to determine the initial required power of the power distribution unit, combined with the rated power of each power module. Under the premise of ensuring that the total power demand of a single terminal remains unchanged, the output power of each power module is further adjusted. Compared with the traditional method, the present invention can call the minimum number of power modules while ensuring the power supply demand of a single terminal, thereby improving the power utilization of the charging and discharging system.

[0085] FIG4 is a flow chart of a power distribution method applicable to a single system cabinet multi-terminal system provided by an embodiment of the present invention, the method comprising:

[0086] S401: Determine the type of charging and discharging system according to the number and connection relationship between the terminals and the system cabinets.

[0087] The specific implementation of S401 can refer to the introduction of S201, which will not be repeated here.

[0088] S402: When the charging and discharging system type is a single system cabinet multi-terminal system, a required power of each terminal is modulo the rated power of the power module in the single system cabinet to obtain a remainder corresponding to each terminal.

[0089] When the charging and discharging system type is a single system cabinet multi-terminal system, if the sum of the power requirements of all terminals in the single system cabinet exceeds the rated output power of the single system cabinet, or the actual number of power modules required by all terminals in the single system cabinet exceeds the number of available modules in the single system cabinet, the number and output power of the power modules allocated by the power distribution unit that supplies power to each terminal can be adjusted to maximize the actual output power of the charging and discharging system.

[0090] In an embodiment of the present invention, the adjustment strategy of adjusting the output power and number of power modules so that the actual output power of the single system cabinet is as close to the rated maximum value as possible without exceeding the rated output power of the single system cabinet and the number of available modules is called the maximum output power strategy.

[0091] FIG5 is a schematic diagram of the architecture of a single system cabinet multi-terminal system provided by an embodiment of the present invention. FIG5 takes a single system cabinet including 12 power modules and 4 PDUs as an example. The 12 power modules can be referred to as modules 1 to 12, and the 4 PDUs can be referred to as PDU1 to PDU4. PDU1 is connected to charging terminal 1, PDU2 is connected to charging terminal 2, PDU3 is connected to charging terminal 3, and PDU4 is connected to charging terminal 4. Each PDU can supply power to the charging terminal connected to it through the allocated power module.

[0092] In the embodiment of the present invention, there is no limitation on the power distribution topology of the charging and discharging system, and the power distribution topology of the charging and discharging system may be a full matrix topology, a partial matrix, a ring type, a bus type, a star type, and a triangular cone type.

[0093] For a single system cabinet with multiple terminals, in actual application scenarios, the actual number of power modules required by all terminals in the single system cabinet is often greater than the number of available modules in the single system cabinet.

[0094] The actual number of power modules required by all terminals for a single system cabinet can be determined based on the power requirements of each terminal and the rated power of the power modules in the single system cabinet. The number of available modules in a single system cabinet can be determined based on the rated output power of the single system cabinet and the rated power of the power modules in the single system cabinet.

[0095] For example, a single system cabinet supplies power to four terminals. Assuming that the power requirements of terminals 1 to 4 are 70kw, 45kw, 54kw, and 68kw respectively, and the rated power of the power modules in the single system cabinet is 20kw, the single system cabinet needs to allocate 4 power modules to meet the power requirements of terminal 1, 3 power modules to meet the power requirements of terminal 2, 3 power modules to meet the power requirements of terminal 3, and 4 power modules to meet the power requirements of terminal 4, then the actual number of power modules required by all terminals for the single system cabinet is 4+3+3+4=14. The rated output power of the single system cabinet is 240kw, so the number of available modules in the single system cabinet is 240 / 20=12.

[0096] When the actual number of power modules required by all terminals in a single system cabinet is greater than the number of available modules in the single system cabinet, in order not to exceed the number of available modules in the single system cabinet, the required power of each terminal can be modulo the rated power of the power module in the single system cabinet to obtain the remainder corresponding to each terminal.

[0097] S403: Reduce the actual number of power modules required by the target terminal in the single system cabinet one by one in ascending order of the remainder, and adjust the output power of the power module currently actually connected to the target terminal to the rated power, until the actual number of power modules required by all terminals in the single system cabinet is equal to the number of available modules in the single system cabinet, then end the operation.

[0098] In actual application scenarios, the difference between the actual number of required modules and the number of available modules can be used as the number of power modules to be reduced. According to the order of remainders from small to large, the number of power modules corresponding to each target terminal is reduced by one until the number of reduced power modules reaches the number of power modules to be reduced, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power.

[0099] In the above-mentioned example of a single system cabinet supplying power to four terminals, the power requirements of terminals 1 to 4 are 70kw, 45kw, 54kw and 68kw respectively. The power requirements of terminals 1 to 4 are modulo the rated power of the power module in the single system cabinet, 20kw. The remainders corresponding to terminal 1, terminal 2, terminal 3 and terminal 4 are 10, 5, 14 and 8 respectively. The number of available modules in a single system cabinet is 12, and the actual number of power modules required by all terminals for the single system cabinet is 14. At this time, 2 power modules need to be reduced. Arranged in order of remainder from small to large, the remainder corresponding to terminal 2 is the smallest, and the remainder corresponding to terminal 4 is the second smallest. Therefore, the power modules supplied by terminal 2 can be adjusted from 3 to 2, and the power modules supplied by terminal 4 can be adjusted from 4 to 3.

[0100] Figure 6 is a schematic diagram of adjusting the output power and number of power modules of a single system cabinet multi-terminal system provided by an embodiment of the present invention. The schematic diagram on the upper side of Figure 6 is a schematic diagram of the single system cabinet supplying power to 4 terminals in the initial state. The power requirements of terminals 1 to 4 are 70kw, 45kw, 54kw and 68kw respectively, and the total power requirement is 237kw. Terminal 1 occupies 4 power modules, and the output power of each power module is 17.5kw; terminal 2 occupies 3 power modules, and the output power of each power module is 15kw; terminal 3 occupies 3 power modules, and the output power of each power module is 18kw; terminal 4 occupies 4 power modules, and the output power of each power module is 17kw. Before the adjustment, the 4 terminals occupied a total of 14 power modules, which exceeded the upper limit of 12 modules of the single system cabinet.

[0101] The schematic diagram on the lower side of Figure 6 is a schematic diagram of each power distribution unit of a single system cabinet supplying power to a terminal after adjustment according to the maximum output power strategy. After the adjustment, the number of power modules occupied by terminal 2 and terminal 4 is reduced by one each. At this time, terminal 1 occupies 4 power modules, and the output power of each power module is 17.5kw; terminal 2 occupies 2 power modules, and the output power of each power module is 20kw; terminal 3 occupies 3 power modules, and the output power of each power module is 18kw; terminal 4 occupies 3 power modules, and the output power of each power module is 20kw. After the adjustment, the actual output power of the single system cabinet is 17.5*4+20*2+18*3+20*3=224kw.

[0102] As can be seen from Figure 6, before the adjustment, a total of 14 power modules are needed to supply power to multiple terminals. After the adjustment, 12 power modules in a single system cabinet can be used to supply power to multiple terminals.

[0103] For a single system cabinet with multiple terminals, traditional power allocation methods include determining the allocation strategy by sorting by terminal ID size, or determining the allocation strategy by the order in which the terminals are charged.

[0104] The rated power of the charging and discharging system has an upper limit. Assuming that the charging and discharging system is equipped with 12 power modules, and the rated power of each module is 20kw, the rated output power of the charging and discharging system is 240kw. There are 4 charging terminals in the system cabinet, and the required power is 70kw, 45kw, 54kw and 68kw respectively. The total required power is 237kw, which requires 14 power modules.

[0105] Taking the allocation strategy determined by terminal ID size as an example, the terminals are arranged in ascending order of terminal ID, namely terminal 1, terminal 2, terminal 3 and terminal 4. The power supply requirements of terminals with small terminal IDs are met first. Under the premise that the system cabinet has only 12 modules, the actual output power to terminal 1, terminal 2, terminal 3 and terminal 4 is 70 kw, 45 kw, 40 kw and 60 kw respectively. After adjustment, the actual output power of a single system cabinet is 70 + 45 + 40 + 60 = 215 kw.

[0106] Taking the order of terminal charging to determine the allocation strategy as an example, the terminals are arranged in the order of charging, namely terminal 4, terminal 1, terminal 3 and terminal 2. The power supply needs of the terminals that charge first are met first. Under the premise that the system cabinet has only 12 modules, the actual output power to terminal 1, terminal 2, terminal 3 and terminal 4 is 70 kw, 40 kw, 40 kw and 68 kw respectively. After adjustment, the actual output power of a single system cabinet is 70 +40+40 +68= 218 kw.

[0107] Compared with the traditional power allocation method, the maximum output power strategy provided in the embodiment of the present invention can maximize the output power of a single system cabinet without exceeding the rated output power and the number of available modules that can be provided by the single system cabinet.

[0108] It can be seen from the above technical scheme that the type of charging and discharging system is determined according to the number and connection relationship between the terminal and the system cabinet. In the case where the charging and discharging system type is a single system cabinet multi-terminal system, the required power of each terminal is respectively modulo the rated power of the power module in the single system cabinet to obtain the remainder corresponding to each terminal. The smaller the value of the remainder, the smaller the impact of reducing the number of power modules corresponding to the remainder on the output power of the charging and discharging system. In order to maximize the output power of the charging and discharging system, the actual number of requirements of the target terminal for the power module in the single system cabinet can be reduced one by one in ascending order of the remainder, and the output power of the power module currently actually connected to the target terminal can be adjusted to the rated power until the actual number of requirements of all terminals for the power modules in the single system cabinet is equal to the number of available modules in the single system cabinet, and then the operation is terminated. In this technical scheme, the number and output power of the power modules are adjusted based on the remainder corresponding to each terminal, so that the output power of the single system cabinet can be maximized without exceeding the rated output power and the number of available modules that can be provided by the single system cabinet.

[0109] The single-system cabinet multi-terminal system shown in Figure 5 takes the example of each power distribution unit being connected to one terminal. In practical applications, there may also be a situation where multiple power distribution units of a single-system cabinet are connected to one terminal at the same time. As shown in Figure 7, it is a schematic diagram of a composite charging and discharging system with parallel output of power distribution units provided by an embodiment of the present invention. Figure 7 takes the example of a single-system cabinet supplying power to two charging terminals. The single-system cabinet includes 12 power modules and 4 power distribution units. The 12 power modules are modules 1 to 12, and the 4 power distribution units are PDU1 to PDU4. Among them, PDU1 and PDU2 are connected to charging terminal 1, and PDU3 and PDU4 are connected to charging terminal 2. The above-mentioned maximum output power strategy is also applicable to the composite charging and discharging system shown in Figure 7.

[0110] In addition to the single-terminal cross-cabinet parallel system and single-system cabinet multi-terminal system introduced above, in actual applications, there may also be a hybrid charging and discharging system that includes both a single-terminal cross-cabinet parallel system and a single-system cabinet multi-terminal system.

[0111] FIG8 is a flow chart of a power distribution method applicable to a hybrid charging and discharging system provided by an embodiment of the present invention, the method comprising:

[0112] S801: Determine the type of charging and discharging system according to the number and connection relationship between the terminals and the system cabinets.

[0113] The specific implementation of S801 can refer to the introduction of S201, which will not be repeated here.

[0114] S802: The terminals connected in parallel across cabinets are regarded as cross-cabinet terminals, and the number of power modules required for each power distribution unit is adjusted according to the rated power of the power modules allocated to each power distribution unit, the total required power of the cross-cabinet terminal, and the initial required power of the cross-cabinet terminal for each power distribution unit.

[0115] When the charging and discharging system includes multiple terminals and multiple system cabinets, and there is a single terminal connected in parallel with multiple system cabinets across cabinets, and a single system cabinet is connected in parallel with multiple terminals at the same time, it can be determined that the charging and discharging system type includes both a single-terminal cross-cabinet parallel system and a single system cabinet multi-terminal system.

[0116] For hybrid charging and discharging systems, the output power and number of power modules supplying power to terminals connected in parallel across cabinets can be adjusted according to the strategy of minimum number of power modules first, and then the output power and number of power modules supplying power to each terminal in each system cabinet can be adjusted based on the strategy of maximum output power.

[0117] In the embodiment of the present invention, the terminals connected in parallel across cabinets can be used as cross-cabinet terminals, and the output power and number of power modules supplying power to the cross-cabinet terminals are adjusted according to the rated power of each power module and the total required power of the cross-cabinet terminals according to the minimum number of power modules strategy. Then, according to the rated output power of each system cabinet and the required power of each terminal, the output power and number of power modules in each system cabinet supplying power to each terminal are adjusted according to the maximum output power strategy.

[0118] The initial required power of each power distribution unit may be the required power after initial distribution based on the total required power of the terminals across the cabinets.

[0119] S803: When the total power requirement of the terminals across the cabinets is met, the output power of the power modules required by each power distribution unit is adjusted based on the rated power of the power modules allocated by each power distribution unit and the adjusted number of power modules required by each power distribution unit.

[0120] For cross-cabinet terminals, the method of adjusting the output power and number of power modules supplying power to the cross-cabinet terminals can refer to the method of adjusting the number and output power of power modules in a single-terminal cross-cabinet parallel system, which will not be repeated here. S804: Perform a remainder operation on the required power of each terminal and the rated power of the power module in the target system cabinet to obtain the remainder corresponding to each terminal.

[0121] The target system cabinet is any one of the system cabinets.

[0122] S805: In ascending order of remainders, the actual number of power modules in the target system cabinet required by the target terminal is reduced by one, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power, until the actual number of power modules required by all terminals in the target system cabinet is equal to the number of available modules in the target system cabinet. For the hybrid charging and discharging system, the method of adjusting the output power and number of power modules in each system cabinet that supply power to each terminal can refer to the method of adjusting the number of power modules and output power in a single system cabinet multi-terminal system, which will not be repeated here.

[0123] FIG9 is a schematic diagram of the structure of a hybrid charging and discharging system provided by an embodiment of the present invention, which includes both a single-terminal cross-cabinet parallel system and a single system cabinet multi-terminal system. FIG9 takes 4 system cabinets and 5 charging terminals as an example. The 4 system cabinets are system cabinets 1 to system cabinets 4, and the 5 charging terminals are charging terminals 1 to charging terminals 5. As can be seen from FIG9, system cabinet 1 supplies power to charging terminal 1 through PDU1 and supplies power to charging terminal 3 through PDU2; system cabinet 2 supplies power to charging terminal 2 through PDU1 and supplies power to charging terminal 3 through PDU2; system cabinet 3 supplies power to charging terminal 3 through PDU1 and supplies power to charging terminal 4 through PDU2; system cabinet 4 supplies power to charging terminal 3 through PDU1 and supplies power to charging terminal 5 through PDU2. For system cabinet 1, system cabinet 2, system cabinet 3 and system cabinet 3, the systems formed by these system cabinets and the charging terminals connected to them all belong to a single system cabinet multi-terminal system. As for the charging terminal 3, it is connected to the PDU2 of the system cabinet, the PDU2 of the system cabinet 2, the PDU1 of the system cabinet 3 and the PDU1 of the system cabinet 4 respectively, which belongs to a single-terminal cross-cabinet parallel system.

[0124] When performing power distribution for the system shown in FIG9 , the charging terminal 3 can be used as a cross-cabinet terminal, and the output power and number of power modules supplying power to the charging terminal 3 can be adjusted according to the minimum number of power modules strategy. Then, the output power and number of power modules supplying power to each terminal from system cabinet 1 to system cabinet 4 can be adjusted according to the maximum output power strategy.

[0125] In the embodiment of the present invention, for the hybrid charging and discharging system, the output power and number of power modules are adjusted by combining the strategy of minimum number of power modules and the strategy of maximum output power, which is more conducive to achieving maximum power distribution.

[0126] It can be seen from the above technical solution that the type of charging and discharging system is determined according to the number and connection relationship between the terminal and the system cabinet. When the type of charging and discharging system includes both a single-terminal cross-cabinet parallel system and a single-system cabinet multi-terminal system, the terminal connected in parallel across the cabinet can be used as a cross-cabinet terminal. For a single-terminal cross-cabinet parallel system, the closer the output power of the power module is to its rated power, the fewer the number of power modules required. Therefore, the number of power modules required for each power distribution unit can be adjusted according to the rated power of the power module allocated by each power distribution unit, the total required power of the cross-cabinet terminal, and the initial required power of the cross-cabinet terminal for each power distribution unit. In order to improve the utilization rate of the power of the charging and discharging system, based on the rated power of the power module allocated by each power distribution unit and the adjusted number of power modules required by each power distribution unit, the output power of the power module required by each power distribution unit is adjusted while meeting the total required power of the cross-cabinet terminal. For a single-system cabinet multi-terminal system, the required power of each terminal is modulo the rated power of the power module in the target system cabinet to obtain the remainder corresponding to each terminal. The smaller the value of the remainder, the smaller the impact of reducing the number of power modules corresponding to the remainder on the output power of the charging and discharging system. In order to maximize the output power of the charging and discharging system, the actual number of power modules in the target system cabinet required by the target terminal can be reduced by one one by one in ascending order of the remainder, and the output power of the power module currently actually connected to the target terminal can be adjusted to the rated power until the actual number of power modules in the target system cabinet required by all terminals is equal to the number of available modules in the target system cabinet. The traditional scheme distributes power in proportion to the output capacity of the power distribution unit. The present invention adjusts the number of power modules required by each power distribution unit based on the initial distribution of the total power demand of the cross-cabinet terminal to determine the initial power demand of the power distribution unit, combined with the rated power of each power module. Under the premise of ensuring that the total power demand of the cross-cabinet terminal remains unchanged, the output power of each power module is further adjusted, and the minimum number of power modules can be called while ensuring the power supply demand of the cross-cabinet terminal, thereby improving the power utilization of the charging and discharging system. And on this basis, the number of power modules and the output power are further adjusted based on the remainder corresponding to each terminal, so that the output power of the charging and discharging system can be maximized without exceeding the rated output power and the number of available modules that the system cabinet can provide.

[0127] FIG10 is a schematic diagram of the structure of a charging and discharging system provided by an embodiment of the present invention, including a monitoring module, the monitoring module including a determining unit 101 and an adjusting unit 102;

[0128] A determination unit 101, configured to determine the type of the charging and discharging system according to the number and connection relationship between the terminals and the system cabinets;

[0129] The adjustment unit 102 is used to adjust the number of power modules required by the target power distribution unit according to the rated power of the power modules allocated to each power distribution unit, the total required power of the single terminal and the initial required power of the single terminal to the target power distribution unit when the charging and discharging system type is a single-terminal cross-cabinet parallel system; wherein the initial required power of the target power distribution unit is the required power after initial allocation based on the total required power of the single terminal; when the total required power of the single terminal is met, the output power of the power modules required by each power distribution unit is adjusted based on the rated power of the power modules allocated by the target power distribution unit and the adjusted number of power modules required by the target power distribution unit.

[0130] In some embodiments, the adjustment unit includes a power adjustment subunit and a number adjustment subunit;

[0131] The power adjustment subunit is used to adjust the actual power required by the single terminal for each power allocation unit according to the total power required by the single terminal, the initial power required by the single terminal for the target power allocation unit, and the rated power of the power module allocated to each power allocation unit;

[0132] The number adjustment subunit is used to adjust the number of power modules required by each power distribution unit based on the actual power required by the single terminal for each power distribution unit and the rated power of the power modules allocated by each power distribution unit.

[0133] In some embodiments, the number adjustment subunit is used to perform a modulo operation on the actual required power of the single terminal to the target power allocation unit and the rated power of the target power module to obtain a quotient and a remainder;

[0134] When the remainder is zero, the quotient is used as the target number of power modules;

[0135] When the remainder is not zero, the quotient is increased by one as the target number of power modules.

[0136] In some embodiments, the adjustment unit includes a first power adjustment subunit and a second power adjustment subunit;

[0137] A first power adjustment subunit, configured to adjust the output power of each power module required after the target power allocation unit is adjusted to the rated power when the target power allocation unit is not the last power allocation unit;

[0138] The second power adjustment subunit is used to determine the remaining required power of the single terminal based on the total required power of the single terminal and the output power provided to the single terminal by other power allocation units when the target power allocation unit is the last power allocation unit; and determine the output power of each power module required after the last power allocation unit is adjusted based on the remaining required power of the single terminal and the number of power modules required after the last power allocation unit is adjusted.

[0139] In some embodiments, the second power adjustment subunit is used to determine the output power provided by other power distribution units to the single terminal according to the number of target power modules connected to other power distribution units and the rated power of the target power modules; wherein the other power distribution units are the remaining power distribution units except the last power distribution unit among all power distribution units supplying power to the single terminal;

[0140] The difference between the total required power of the single terminal and the output power provided to the single terminal by other power allocation units is taken as the remaining required power of the single terminal.

[0141] For the description of the features in the embodiment corresponding to FIG. 10 , reference can be made to the relevant description of the embodiment corresponding to FIG. 2 , and they will not be described one by one here.

[0142] It can be seen from the above technical scheme that the type of charging and discharging system is determined according to the number and connection relationship between the terminal and the system cabinet. The type of charging and discharging system is a single-terminal cross-cabinet parallel system. When the output power of the power module is closer to its rated power, the number of power modules required is less. Therefore, the number of power modules required for the target power distribution unit can be adjusted according to the rated power of the power modules allocated by each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal to the target power distribution unit; wherein, the initial required power of the target power distribution unit is the required power after the initial allocation of the total required power of the single terminal. In order to improve the utilization rate of the power of the charging and discharging system, under the condition of meeting the total required power of the single terminal, the output power of the power module required by each power distribution unit is adjusted based on the rated power of the power module allocated by the target power distribution unit and the number of power modules required by the adjusted target power distribution unit. The traditional scheme allocates power in proportion to the output capacity of the power distribution unit. The present invention adjusts the number of power modules required for each power distribution unit based on the initial allocation of the total required power of the single terminal to determine the initial required power of the power distribution unit, combined with the rated power of each power module. Under the premise of ensuring that the total power demand of a single terminal remains unchanged, the output power of each power module is further adjusted. Compared with the traditional method, the present invention can call the minimum number of power modules while ensuring the power supply demand of a single terminal, thereby improving the power utilization of the charging and discharging system.

[0143] FIG11 is a structural diagram of a power distribution device of a charging and discharging system provided by an embodiment of the present invention. As shown in FIG11 , the power distribution device of the charging and discharging system includes: a memory 110 for storing a computer program;

[0144] The processor 111 is used to implement the steps of the power allocation method of the charging and discharging system in the above embodiment when executing the computer program.

[0145] The power distribution device of the charging and discharging system provided in this embodiment may include but is not limited to a smart phone, a tablet computer, a laptop computer or a desktop computer.

[0146] Among them, the processor 111 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 111 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 111 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 111 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 111 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0147] The memory 110 may include one or more computer-readable storage media, which may be non-transitory. The memory 110 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 110 is at least used to store the following computer program 1101, wherein the computer program is loaded and executed by the processor 111, and the relevant steps of the power allocation method of the charging and discharging system disclosed in any of the aforementioned embodiments can be implemented. In addition, the resources stored in the memory 110 may also include an operating system 1102 and data 1103, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 1102 may include Windows, Unix, Linux, etc. Data 1103 may include, but is not limited to, the rated power of the power modules in each system cabinet, the total required power of a single terminal, the rated output power of a single system cabinet, and the required power of each terminal.

[0148] In some embodiments, the power distribution device of the charging and discharging system may further include a display screen 112 , an input and output interface 113 , a communication interface 114 , a power supply 115 , and a communication bus 116 .

[0149] Those skilled in the art will appreciate that the structure shown in FIG. 11 does not constitute a limitation on the power distribution device of the charging and discharging system, and may include more or fewer components than those shown in the figure.

[0150] It is understandable that if the power distribution method of the charging and discharging system in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, magnetic disk or optical disk and other media that can store program codes.

[0151] Based on this, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the power allocation method of the charging and discharging system as described above are implemented.

[0152] The functions of the functional modules of the computer-readable storage medium described in the embodiment of the present invention can be specifically implemented according to the method in the above method embodiment. The specific implementation process can refer to the relevant description of the above method embodiment, which will not be repeated here.

[0153] The above is a detailed introduction to a power distribution method, system, device and medium for a charging and discharging system provided by an embodiment of the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0154] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0155] The above is a detailed introduction to the power distribution method, system, device and medium of a charging and discharging system provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A power distribution method for a charging and discharging system, characterized in that: include: Determine the type of charging and discharging system based on the number and connection relationship between terminals and system cabinets; When the charging and discharging system type is a single-terminal cross-cabinet parallel system, the number of power modules required by the target power distribution unit is adjusted according to the rated power of the power modules allocated by each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal to the target power distribution unit; wherein the initial required power of the target power distribution unit is the required power after the initial allocation based on the total required power of the single terminal; When the total power requirement of the single terminal is met, the output power of the power modules required by each power allocation unit is adjusted based on the rated power of the power modules allocated by the target power allocation unit and the number of power modules required by the adjusted target power allocation unit.

2. The power distribution method of the charging and discharging system according to claim 1, characterized in that: According to the rated power of the power modules allocated by each power allocation unit, the total required power of the single terminal, and the initial required power of the single terminal for the target power allocation unit, adjusting the number of power modules required for the target power allocation unit includes: According to the total power demand of the single terminal, the initial power demand of the single terminal for the target power allocation unit, and the rated power of the power module allocated to each power allocation unit, adjusting the actual power demand of the single terminal for each power allocation unit; Based on the actual power demand of each power allocation unit by the single terminal and the rated power of the power modules allocated by each power allocation unit, the number of power modules required by each power allocation unit is adjusted.

3. The power distribution method of the charging and discharging system according to claim 2, characterized in that: Based on the actual power demand of each power distribution unit by the single terminal and the rated power of the power modules allocated by each power distribution unit, adjusting the number of power modules required for each power distribution unit includes: Performing a modulo operation on the actual power demanded by the single terminal for the target power allocation unit and the rated power of the target power module to obtain a quotient and a remainder; When the remainder is zero, the quotient is used as the target number of power modules; When the remainder is not zero, the quotient is increased by one as the target number of power modules.

4. The power distribution method of the charging and discharging system according to claim 1, characterized in that: In the case where the total required power of the single terminal is met, adjusting the output power of the power modules required by each power allocation unit based on the rated power of the power modules allocated by the target power allocation unit and the number of power modules required by the adjusted target power allocation unit includes: When the target power distribution unit is not the last power distribution unit, the output power of each power module required after the target power distribution unit is adjusted is adjusted to the rated power; When the target power allocation unit is the last power allocation unit, the remaining required power of the single terminal is determined based on the total required power of the single terminal and the output power provided to the single terminal by other power allocation units; the output power of each power module required after the last power allocation unit is adjusted is determined based on the remaining required power of the single terminal and the number of power modules required after adjustment of the last power allocation unit.

5. The power distribution method of the charging and discharging system according to claim 4, characterized in that: Determining the remaining required power of the single terminal according to the total required power of the single terminal and the output power provided to the single terminal by other power allocation units includes: Determine the output power provided by other power distribution units to the single terminal according to the number of target power modules connected to other power distribution units and the rated power of the target power modules; wherein the other power distribution units are the remaining power distribution units except the last power distribution unit among all power distribution units supplying power to the single terminal; The difference between the total required power of the single terminal and the output power provided to the single terminal by other power allocation units is taken as the remaining required power of the single terminal.

6. A power distribution method for a charging and discharging system, characterized in that: include: Determine the type of charging and discharging system based on the number and connection relationship between terminals and system cabinets; When the charging and discharging system type is a single system cabinet multi-terminal system, the required power of each terminal is respectively modulo the rated power of the power module in the single system cabinet to obtain the remainder corresponding to each terminal; In ascending order of remainders, the actual number of power modules required by the target terminal for the single system cabinet is reduced one by one, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power, until the actual number of power modules required by all terminals for the single system cabinet is equal to the number of available modules of the single system cabinet, then the operation is terminated.

7. The power distribution method of the charging and discharging system according to claim 6, characterized in that: In the order of the ascending remainders, the actual number of power modules required by the target terminal for the single system cabinet is reduced one by one, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power, until the actual number of power modules required by all terminals for the single system cabinet is equal to the number of available modules, and then the operation is terminated, including: The difference between the actual required number and the available number of modules is used as the number of power modules to be reduced; According to the order of the remainder from small to large, the number of power modules corresponding to each target terminal is reduced by one in turn until the number of reduced power modules reaches the number of power modules to be reduced, and the output power of the power module currently actually connected to the target terminal is adjusted to the rated power.

8. A power distribution method for a charging and discharging system, characterized in that: include: Determine the type of charging and discharging system based on the number and connection relationship between terminals and system cabinets; When the charging and discharging system type includes both a single-terminal cross-cabinet parallel system and a single-system cabinet multi-terminal system, the cross-cabinet parallel terminal is used as a cross-cabinet terminal, and the number of power modules required for each power distribution unit is adjusted according to the rated power of the power module allocated to each power distribution unit, the total required power of the cross-cabinet terminal, and the initial required power of the cross-cabinet terminal for each power distribution unit; wherein the initial required power of each power distribution unit is the required power after initial allocation based on the total required power of the cross-cabinet terminal; when the total required power of the cross-cabinet terminal is met, the output power of the power module required for each power distribution unit is adjusted based on the rated power of the power module allocated to each power distribution unit and the adjusted number of power modules required for each power distribution unit; Perform modulo operation on the required power of each terminal and the rated power of the power module in the target system cabinet to obtain the remainder corresponding to each terminal; wherein the target system cabinet is any one of the system cabinets; in ascending order of the remainders, reduce the actual required number of power modules in the target system cabinet required by the target terminal one by one, and adjust the output power of the power module currently actually connected to the target terminal to the rated power, until the actual required number of power modules in the target system cabinet by all terminals is equal to the number of available modules in the target system cabinet.

9. A charging and discharging system, characterized in that: comprising a monitoring module, wherein the monitoring module comprises a determining unit and an adjusting unit; The determination unit is used to determine the type of charging and discharging system according to the number and connection relationship between the terminals and the system cabinets; The adjustment unit is used to adjust the number of power modules required for the target power distribution unit according to the rated power of the power modules allocated to each power distribution unit, the total required power of the single terminal, and the initial required power of the single terminal to the target power distribution unit when the charging and discharging system type is a single-terminal cross-cabinet parallel system; wherein the initial required power of the target power distribution unit is the required power after initial allocation based on the total required power of the single terminal; and when the total required power of the single terminal is met, the output power of the power modules required by each power distribution unit is adjusted based on the rated power of the power modules allocated by the target power distribution unit and the adjusted number of power modules required by the target power distribution unit.

10. A power distribution device for a charging and discharging system, characterized in that: include: Memory for storing computer programs; A processor, configured to execute the computer program to implement the steps of the power distribution method for a charging and discharging system as claimed in any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the power distribution method of the charging and discharging system according to any one of claims 1 to 8 are implemented.

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