Charging system output power control method and device, equipment and medium

Abstract

The invention discloses a charging system output power control method and device, equipment and a medium, and belongs to the technical field of charging automobiles, and the method comprises the steps: when a charging request of to-be-charged equipment is received, determining the target demand power of the to-be-charged equipment, and determining the maximum power capable of being borne by a battery pack in the to-be-charged equipment; determining a target constraint condition for safe operation of the charging system according to the power grid load, the power distribution capacity, the component temperature and the component state; generating an adjusting instruction for adjusting the output power of the charging system according to the target demand power, the maximum power capable of being borne by the battery pack and the target constraint condition; and controlling a power adjustment module of the charging system according to the adjustment instruction so as to adjust the output power of the charging system. By means of the method, the safety of the charging system in the operation process can be greatly improved, and maximization of the output power of the charging system can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of charging vehicles, and in particular to a method, device, equipment and medium for controlling the output power of a charging system. Background Art

[0002] With the rapid development of electric vehicles, the charging system of electric vehicles has also received widespread attention. In order to efficiently charge multiple electric vehicles at the same time, the output power of the charging system has been balanced between fast charging and safe charging.

[0003] In the existing charging system output power control method, the output power of the charging system is usually controlled according to the capacity of the distribution transformer. However, the capacity of the distribution transformer is relatively fixed, so this method will limit the output power of the charging system and cannot guarantee the maximization of the output power of the charging system. In addition, since the output power of the charging system is limited by many factors, such as: grid load and power tolerance of electric vehicles, etc. Therefore, if only the capacity of the distribution transformer is used to control the output power of the charging system, the safety of the charging system during operation cannot be guaranteed.

[0004] It can be seen that how to ensure that the charging system operates safely while maximizing the output power of the charging system is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method, device, equipment and medium for controlling the output power of a charging system, so as to solve the technical problem in the prior art that the charging system cannot ensure the maximum output power while operating safely. The specific scheme is as follows:

[0006] In order to solve the above technical problems, the present invention provides a method for controlling the output power of a charging system, comprising:

[0007] When receiving a charging request from a device to be charged, determining a target required power of the device to be charged and determining a maximum power that a battery pack in the device to be charged can withstand;

[0008] Determine the target constraints under which the charging system can operate safely based on grid load, distribution capacity, component temperature, and component status;

[0009] generating an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand, and the target constraint condition;

[0010] The power adjustment module of the charging system is controlled according to the adjustment instruction to adjust the output power of the charging system.

[0011] Preferably, the process of determining the target constraint conditions for the safe operation of the charging system according to the grid load, distribution capacity, component temperature and component status includes:

[0012] According to the maximum load that the power grid can bear, a first sub-constraint condition is obtained;

[0013] According to the maximum capacity of the distribution transformer, the second sub-constraint is obtained;

[0014] Obtaining a third sub-constraint condition according to a temperature threshold that each component in the charging system can withstand during operation;

[0015] The fourth sub-constraint condition is obtained according to the maximum power that the devices in each component in the charging system can withstand in a safe operating state.

[0016] Preferably, the process of generating an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand, and the target constraint condition includes:

[0017] respectively setting corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition, and the fourth sub-constraint condition to obtain a first weight value, a second weight value, a third weight value, and a fourth weight value for adjusting the output power of the charging system;

[0018] The target required power is used as an output target, and an adjustment instruction for adjusting the output power of the charging system is generated according to the first weight value, the second weight value, the third weight value, and the fourth weight value for adjusting the output power of the charging system.

[0019] Preferably, the process of setting corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition respectively includes:

[0020] According to the importance of affecting the safe operation of the charging system or the TOPSIS algorithm or the principal component analysis method or the hierarchical analysis method, corresponding weight values ​​are set for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition respectively.

[0021] Preferably, the process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0022] If the operating temperature value of the device to be charged exceeds a first preset threshold value during the process of the charging system charging the device to be charged, the PDU for charging the device to be charged is searched according to the adjustment instruction to obtain the charging PDU, and the output power of the charging PDU is reduced so that the operating temperature value of the device to be charged drops to the first preset threshold value;

[0023] If an abnormal PDU with an operating temperature value exceeding a second preset threshold value appears during the charging process of the charging system for the device to be charged, the output power of the HVDC connected to the abnormal PDU is reduced according to the adjustment instruction so that the operating temperature value of the abnormal PDU drops to the second preset threshold value;

[0024] If an abnormal HVDC having an operating temperature value exceeding a third preset threshold value occurs during the charging process of the charging system for the device to be charged, the output power of the abnormal HVDC is reduced according to the adjustment instruction so that the operating temperature value of the abnormal HVDC drops to the third preset threshold value;

[0025] If an abnormal charging cabinet whose operating temperature value exceeds the fourth preset threshold value appears during the charging system charging the device to be charged, the power output of the abnormal charging cabinet is reduced according to the adjustment instruction, and the cloud platform is notified to increase the output power of the PDU in other charging cabinets in the charging system, so that the operating temperature value of the abnormal charging cabinet drops to the fourth preset threshold value, and the overall output power of the charging system meets the target demand power.

[0026] Preferably, it also includes:

[0027] When the operating temperature value of the device to be charged drops to the first preset threshold, and / or the operating temperature value of the abnormal PDU drops to the second preset threshold, and / or the operating temperature value of the abnormal HVDC drops to the third preset threshold, and / or the operating temperature value of the abnormal charging cabinet drops to the fourth preset threshold, the output power of the charging PDU and / or the abnormal PDU and / or the abnormal HVDC and / or the abnormal charging cabinet is adjusted according to the adjustment instruction so that the overall output power of the charging system meets the target demand power.

[0028] Preferably, the process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0029] If the operating temperature value of the designated component in the charging system changes from the warning temperature value to the target temperature value, the output power of the designated component is controlled according to the power adjustment model; wherein the expression of the power adjustment model is:

[0030]

[0031] Where, T 1 is the warning temperature value, T is the target temperature value, Pout is the limit power output value of the designated component when ensuring a safe operating state, and Pctrl is the power output by the designated component at T.

[0032] Preferably, the process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0033] If the target required power does not exceed the maximum power that can be output by the target charging cabinet in the charging system, the output power of the PDU in the target charging cabinet is controlled according to the adjustment instruction.

[0034] Preferably, if the target required power does not exceed the maximum power that can be output by the target charging cabinet in the charging system, the process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction includes:

[0035] If the target required power does not exceed the output power of the target PDU in the target charging cabinet, the output power of the target PDU is controlled according to the adjustment instruction.

[0036] Preferably, if the target required power does not exceed the maximum power that can be output by the target charging cabinet in the charging system, the process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction includes:

[0037] If the target required power exceeds the output power of the target PDU in the target charging cabinet, but does not exceed the maximum power that the target charging cabinet can output, a PDU is selected from the target charging cabinet according to the target required power to obtain a screened PDU;

[0038] The output power of the screening PDU is controlled according to the adjustment instruction so that the output power of the screening PDU meets the target required power.

[0039] Preferably, the process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction includes:

[0040] Real-time monitoring of the operation status of the PDU in the target charging cabinet;

[0041] If an alarm PDU that does not meet the target constraint condition appears in the target charging cabinet, the output power of the alarm PDU is reduced according to the adjustment instruction, and the PDU in the target charging cabinet that is in an idle state is started so that the output power of the target charging cabinet meets the target demand power.

[0042] Preferably, the process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0043] If the target demand power exceeds the maximum power that the target charging cabinet in the charging system can output, the output power of the target charging cabinet and the idle PDU in other charging cabinets is controlled according to the adjustment instruction so that the output power of the target charging cabinet and the idle PDU meets the target demand power.

[0044] In order to solve the above technical problems, the present invention further provides a control device for output power of a charging system, comprising:

[0045] A power determination module, configured to determine the target required power of the device to be charged and the maximum power that the battery pack in the device to be charged can withstand when receiving a charging request from the device to be charged;

[0046] A condition determination module is used to determine the target constraint conditions for the safe operation of the charging system based on the grid load, distribution capacity, component temperature and component status;

[0047] an instruction generation module, configured to generate an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand, and the target constraint condition;

[0048] The power adjustment module is used to control the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system.

[0049] In order to solve the above technical problems, the present invention further provides a control device for output power of a charging system, comprising:

[0050] Memory for storing computer programs;

[0051] The processor is used to implement the steps of the method for controlling the output power of a charging system as disclosed above when executing the computer program.

[0052] In order to solve the above technical problem, the present invention also 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 a method for controlling the output power of a charging system as disclosed above are implemented.

[0053] It can be seen that in the control method of the output power of the charging system provided by the present invention, when the charging system receives a charging request from the device to be charged, the target power demand of the device to be charged and the maximum power that the battery pack in the device to be charged can withstand are first determined; then, the target constraint conditions for the safe operation of the charging system are determined according to the grid load, distribution capacity, component temperature and component status, and an adjustment instruction for adjusting the output power of the charging system is generated according to the target power demand, the maximum power that the battery pack can withstand and the target constraint conditions; finally, the power adjustment module of the charging system is controlled according to the adjustment instruction, and the output power of the charging system is adjusted accordingly. Compared with the prior art, since this method generates adjustment instructions from the factors of the power demand of the device to be charged, the maximum power that the internal battery pack can withstand and the target constraint conditions for the safe operation of the charging system, and controls the output power of the charging system, it is equivalent to considering all the influencing factors of the device to be charged in the entire charging link to control the output power of the charging system, so the method can greatly improve the safety of the charging system during operation. Furthermore, the method provided by the present invention controls the output power of the charging system in real time according to various influencing factors of the device to be charged in the charging link. Therefore, the method can also ensure the maximization of the output power of the charging system. Correspondingly, the control device, equipment and medium of the output power of the charging system provided by the present invention also have the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0055] Figure 1 A flow chart of a method for controlling output power of a charging system provided by an embodiment of the present invention;

[0056] Figure 2 The principle block diagram of charging the device to be charged;

[0057] Figure 3 A topology diagram showing a charging gun connected in parallel to each PDU in the charging cabinet;

[0058] Figure 4 A topology diagram of multiple charging cabinets connected in parallel with a single charging gun;

[0059] Figure 5 For Figure 4 The flowchart shown is for charging a device to be charged when multiple charging cabinets are connected in parallel with a single charging gun;

[0060] Figure 6 A structural diagram of a device for controlling output power of a charging system provided by an embodiment of the present invention;

[0061] Figure 7 This is a structural diagram of a charging system output power control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0062] 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.

[0063] See also Figure 1 , Figure 1 A flow chart of a method for controlling output power of a charging system provided by an embodiment of the present invention, the method comprising:

[0064] Step S11: when a charging request is received from the device to be charged, the target required power of the device to be charged is determined, and the maximum power that the battery pack in the device to be charged can withstand is determined;

[0065] Step S12: determining target constraint conditions for safe operation of the charging system according to grid load, distribution capacity, component temperature and component status;

[0066] Step S13: generating an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand, and the target constraint condition;

[0067] Step S14: controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system.

[0068] In this embodiment, a method for controlling the output power of a charging system is provided, which can not only ensure the safe operation of the charging system, but also ensure the maximization of the output power of the charging system. It should be noted that the method provided in this embodiment is specifically described with the charging system as the execution subject.

[0069] When the charging system receives a charging request from the device to be charged, it first determines the target power requirement of the device to be charged and the maximum power that the battery pack in the device to be charged can withstand. It is understandable that when the charging system is charging the device to be charged, it needs to charge the device to be charged according to the power requirement of the device to be charged. Therefore, when the charging system is charging the device to be charged, it needs to be aware of the target power requirement of the device to be charged in a timely manner. When the device to be charged receives the power output by the charging system, it mainly relies on the battery pack in the device to be charged to store electrical energy. Therefore, when the charging system is charging the device to be charged, it also needs to be aware of the maximum power that the battery pack in the device to be charged can withstand.

[0070] See also Figure 2 , Figure 2 The principle block diagram of charging the device to be charged. Figure 2 In the figure, 11 represents the power grid, 12 represents the distribution transformer, 13 represents the charging system, and 14 represents the device to be charged. When the charging system 13 charges the device to be charged 14, the AC in the power grid 11 enters the charging system 13 through the distribution transformer 12. When the charging system 13 receives a charging request from the device to be charged 14, the charging system 13 charges the device to be charged 14.

[0071] It is conceivable that in actual applications, there will be many electrical devices connected to the back end of the power grid and the distribution transformer, so the load state of the power grid and the distribution capacity will directly affect the charging state of the device to be charged. Therefore, in order to ensure that the output power of the charging system is maximized when charging the device to be charged, it is also necessary to determine the power grid load and distribution capacity when the charging system is charging the device to be charged.

[0072] In addition, the charging system is composed of a large number of electrical devices, such as: PDU (Power Distribution Unit), HVDC (High Voltage Direct Current), CCU (Charger Control Unit) and contactor, etc. If an electrical device in the charging system leaks, is in an abnormal operating state or is in an overloaded operating state, it will affect the safe and stable operation of the charging system. Therefore, in order to ensure the stability and reliability of the charging system when charging the charging equipment, it is necessary to determine the target constraints for the safe operation of the charging system based on the grid load, distribution capacity, component temperature and component status.

[0073] When the target power requirement of the device to be charged, the maximum power that the battery pack in the device to be charged can withstand, and the target constraints are determined, it is equivalent to obtaining all the influencing factors of the charging system in the process of charging the device to be charged. In this case, an adjustment instruction for adjusting the output power of the charging system can be generated according to the target power requirement of the device to be charged, the maximum power that the battery pack can withstand, and the target constraints. After that, the power adjustment module of the charging system is controlled according to the adjustment instruction, so as to achieve the purpose of adjusting the output power of the charging system.

[0074] It can be imagined that when the charging system is charging the device to be charged, it generates adjustment instructions based on the required power of the device to be charged, the maximum power that its internal battery pack can withstand, and the target constraints for the safe operation of the charging system, and controls and adjusts the charging power of the device to be charged in real time according to the adjustment instructions. This is equivalent to considering all the influencing factors of the device to be charged in the entire charging link to control the output power of the charging system. Therefore, this method can greatly improve the safety of the charging system during operation. In addition, when the charging system is charging the device to be charged, it controls and adjusts its own output power in real time according to the various influencing factors of the device to be charged in the charging link. Therefore, this method can also ensure the maximization of the output power of the charging system.

[0075] It can be seen that in the control method of the output power of the charging system provided in this embodiment, when the charging system receives a charging request from the device to be charged, the target power demand of the device to be charged and the maximum power that the battery pack in the device to be charged can withstand are first determined; then, the target constraint conditions for the safe operation of the charging system are determined according to the grid load, distribution capacity, component temperature and component status, and an adjustment instruction for adjusting the output power of the charging system is generated according to the target power demand, the maximum power that the battery pack can withstand and the target constraint conditions; finally, the power adjustment module of the charging system is controlled according to the adjustment instruction, and the output power of the charging system is adjusted accordingly. Compared with the prior art, since this method generates adjustment instructions from the factors of the power demand of the device to be charged, the maximum power that the internal battery pack can withstand and the target constraint conditions for the safe operation of the charging system, and controls the output power of the charging system, it is equivalent to considering all the influencing factors of the device to be charged in the entire charging link to control the output power of the charging system, so the method can greatly improve the safety of the charging system during operation. Furthermore, the method provided in this embodiment controls the output power of the charging system in real time according to various influencing factors of the device to be charged on the charging link. Therefore, the method can also ensure the maximization of the output power of the charging system.

[0076] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation mode, the above step: the process of determining the target constraint conditions for the safe operation of the charging system according to the grid load, distribution capacity, component temperature and component status includes:

[0077] According to the maximum load that the power grid can bear, the first sub-constraint condition is obtained;

[0078] According to the maximum capacity of the distribution transformer, the second sub-constraint is obtained;

[0079] The third sub-constraint condition is obtained according to the temperature threshold that each component in the charging system can withstand during operation;

[0080] The fourth sub-constraint condition is obtained according to the maximum power that the devices in each component in the charging system can withstand under a safe operating state.

[0081] It is understandable that the safe and stable operation of the charging system is not only closely related to the load of the power grid, but also closely related to the capacity of the distribution transformer, the operating status of its internal components and the operating temperature. Therefore, in order to ensure the safety and stability of the charging system during operation, it is also necessary to determine the maximum load that the power grid can withstand, the maximum capacity of the distribution transformer, the maximum power that the devices in the components of the charging system can withstand under safe operating conditions, and the maximum temperature that the components in the charging system can withstand during operation.

[0082] It is understandable that when the charging system is charging the charging device, the AC power needs to enter the distribution transformer from the power grid before the charging system can receive the energy transmitted by the power grid through the distribution transformer.

[0083] In this case, in order to ensure the stability and reliability of the charging system when charging the charging device, it is necessary to first determine the maximum load that the power grid can bear and obtain the first sub-constraint. That is, the charging system needs to constrain the power output of the charging system according to the first sub-constraint; then, according to the maximum capacity of the distribution transformer, the second sub-constraint is obtained, and the power output of the charging system is limited according to the second sub-constraint.

[0084] In addition, during the operation of the charging system, each component inside it will emit heat. For example, the charging gun plug connector, relay copper busbar, charging module, HVDC, PDU and CCU components in the charging system will emit a lot of heat during operation. When the components in the charging system emit heat during operation, the operating temperature value of the components inside the charging system will increase. When the operating temperature value of the component exceeds the preset operating temperature value, the component will have a high safety hazard, which will lead to a great safety risk for the entire charging system. Therefore, in order to ensure the safety and reliability of the charging system during operation, it is also necessary to determine the maximum temperature threshold that each component in the charging system can withstand during operation to obtain the third sub-constraint condition.

[0085] Since the charging system is composed of components and devices set inside it, the stable operation of the charging system is inseparable from the safe and stable operation of each component inside it. Therefore, in order to ensure the safe and stable operation of each component in the charging system, the devices in each component in the charging system cannot exceed their maximum output power. That is, in order to ensure the safe operation of each component in the charging system, it is also necessary to determine the maximum power that the devices in each component in the charging system can withstand under the safe operation state, and obtain the fourth sub-constraint condition.

[0086] It should be noted that the components in the charging system are divided into power components and control components. Among them, the power components include HVDC and DC units, etc., and the control components include CCU, PDU and CPU (Central Processing Unit), etc. The power component can output power according to a pre-set power curve based on factors such as temperature and voltage. The control component can send commands to the power component according to the pre-set maximum power that can be tolerated to ensure that its power output is within the preset range.

[0087] As a preferred implementation, the above step: the process of generating an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand and the target constraint condition includes:

[0088] Setting corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition, and the fourth sub-constraint condition, respectively, to obtain a first weight value, a second weight value, a third weight value, and a fourth weight value for adjusting the output power of the charging system;

[0089] The target required power is used as the output target, and an adjustment instruction for adjusting the output power of the charging system is generated according to a first weight value, a second weight value, a third weight value, and a fourth weight value for adjusting the output power of the charging system.

[0090] It is understandable that, depending on different application scenarios, when the charging system charges the charging device, the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint have different degrees of influence on the output power of the charging system.

[0091] In order to meet different application scenarios when the charging system charges the charging device, corresponding weight values ​​can be set for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint, respectively, to obtain the first weight value, the second weight value, the third weight value and the fourth weight value for adjusting the output power of the charging system; then, the charging system takes the target demand power of the charging device as the output target, and generates an adjustment instruction for adjusting the output power of the charging system according to the first weight value, the second weight value, the third weight value and the fourth weight value for adjusting the output power of the charging system.

[0092] Specifically, for example: the first weight value, second weight value, third weight value and fourth weight value corresponding to the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint are 50%, 30%, 10% and 10% respectively, and the current output power of the charging system is 100KW.

[0093] Assuming that the power grid fails during the process of charging the charging device, and the power grid cannot bear its maximum load, the first sub-constraint triggers a fault warning, then the charging system needs to reduce the current output power according to the first weight value of 50%, that is, the charging system needs to adjust the current output power from 100KW to 50KW. When the power grid returns to normal and the fault warning triggered by the first sub-constraint is lifted, the charging system needs to adjust the current output power according to the first weight value of 50%, that is, the charging system needs to adjust the current output power from 50KW to 100KW.

[0094] Assume that when the charging system is charging the charging device, the distribution transformer fails and the fault warning is triggered by the second sub-constraint condition. Then the charging system needs to reduce the current output power according to the second weight value of 30%, that is, the charging system needs to adjust the current output power from 100KW to 70KW. When the distribution transformer returns to normal and the fault warning triggered by the second sub-constraint condition is lifted, the charging system needs to adjust the current output power according to the second weight value of 30%, that is, the charging system needs to adjust the current output power from 70KW to 100KW.

[0095] Assume that when the charging system is charging the charging device, the operating temperature of a component in the charging system exceeds its set temperature threshold, and the output power of a device in the charging system also exceeds the maximum power it can withstand. In this case, the third and fourth sub-constraints will trigger the fault warning at the same time, then the charging system needs to reduce the current output power according to the third weight value 10% and the fourth weight value 10% at the same time, that is, the charging system needs to adjust the current output power from 100KW to 80KW; when the fault warning triggered by the third sub-constraint is lifted, the charging system needs to adjust the current output power according to the third weight value 10%, that is, the charging system needs to adjust the current output power from 80KW to 90KW; When the fault warning triggered by the fourth sub-constraint is lifted, the charging system needs to call back the current output power according to the fourth weight value of 10%, that is, the charging system needs to call back the current output power from 80KW to 90KW; when the fault warnings triggered by the third and fourth sub-constraints are lifted at the same time, the charging system needs to call back the current output power according to the third weight value of 10% and the fourth weight value of 10%, that is, the charging system needs to call back the current output power from 80KW to 100KW.

[0096] In addition, it should be noted that under certain extreme conditions, only one of the first, second, third and fourth sub-constraints can be considered, and the constraints of other sub-constraints on the charging system can be ignored. For example, in certain extreme cases, the charging gun line in the charging system can only consider the third sub-constraint, while ignoring the influence of the first, second and fourth sub-constraints on it. In this case, the first, second and fourth weight values ​​can be set to zero, and the third weight value can be set to 100%.

[0097] As a preferred implementation, the above step: the process of setting corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition respectively includes:

[0098] According to the importance of affecting the safe operation of the charging system or the TOPSIS algorithm or the principal component analysis method or the hierarchical analysis method, corresponding weight values ​​are set for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition.

[0099] In this embodiment, when setting corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint, corresponding weight values ​​can be set for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint according to the importance of affecting the safe operation of the charging system or the TOPSIS algorithm or the principal component analysis method or the hierarchical analysis method.

[0100] Among them, when setting corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint according to the importance of affecting the safe operation of the charging system, because it is possible to take into account the influence of various influencing factors on the charging process on the charging process when the charging system charges the device to be charged, therefore, when setting corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint according to the importance of affecting the safe operation of the charging system, the safety and reliability of the charging system when charging the device to be charged can be further guaranteed.

[0101] When setting corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint respectively according to the TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) algorithm, because the algorithm can make full use of all the implicit information in the original collected data, the algorithm can be used to more accurately perform quantitative analysis on the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint when the charging system charges the charging device.

[0102] When setting corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint according to the principal component analysis method, because this method can more objectively set the corresponding weights for each factor based on real data information, this method can more accurately set corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint.

[0103] When setting corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint respectively according to the Analytic Hierarchy Process (AHP), because this method can organically combine quantitative analysis and qualitative analysis, this method can be used to set corresponding weight values ​​for the first sub-constraint, the second sub-constraint, the third sub-constraint and the fourth sub-constraint more accurately and quickly.

[0104] Obviously, the method provided in this embodiment can ensure flexibility and diversity when setting corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition.

[0105] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation mode, the above step: controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0106] If the operating temperature value of the device to be charged exceeds a first preset threshold value during the charging process of the device to be charged by the charging system, the PDU for charging the device to be charged is searched according to the adjustment instruction, the charging PDU is obtained, and the output power of the charging PDU is reduced so that the operating temperature value of the device to be charged drops to the first preset threshold value;

[0107] If an abnormal PDU with an operating temperature value exceeding a second preset threshold value appears during the charging process of the charging system for the charging device, the output power of the HVDC connected to the abnormal PDU is reduced according to the adjustment instruction so that the operating temperature value of the abnormal PDU drops to the second preset threshold value;

[0108] If an abnormal HVDC with an operating temperature value exceeding a third preset threshold value appears during the charging process of the charging system for the charging device, the output power of the abnormal HVDC is reduced according to the adjustment instruction so that the operating temperature value of the abnormal HVDC drops to the third preset threshold value;

[0109] If an abnormal charging cabinet with an operating temperature value exceeding the fourth preset threshold value appears in the process of charging the charging device in the charging system, the power output of the abnormal charging cabinet is reduced according to the adjustment instruction, and the cloud platform is notified to increase the output power of the PDU in other charging cabinets in the charging system, so that the operating temperature value of the abnormal charging cabinet drops to the fourth preset threshold value and the overall output power of the charging system meets the target demand power.

[0110] In order to ensure the safety and reliability of the charged device during the charging process, when an abnormal component appears in the charging system, the charging system can use the proximity control principle to adjust the output power of the charging system.

[0111] When the operating temperature of the device to be charged exceeds the first preset threshold value during the charging process of the charging system, it means that the device to be charged is already in an overloaded state, which poses a great safety hazard. In this case, it is necessary to find the PDU that charges the device to be charged according to the adjustment instruction and obtain the charging PDU; then, the charging system can reduce the output power of the charging PDU, so that the operating temperature of the device to be charged can be reduced to the first preset threshold value, and the safe and stable operation of the device to be charged is guaranteed.

[0112] When an abnormal PDU with an operating temperature value exceeding the second preset threshold value appears during the charging process of the charging system for the charging device, it indicates that the output power of the abnormal PDU is relatively high at the current moment and there is a potential danger. At this time, in order to eliminate the potential risk of the abnormal PDU, the output power of the HVDC connected to the abnormal PDU can be reduced according to the adjustment instruction, so that the operating temperature value of the abnormal PDU can be reduced to the second preset threshold value.

[0113] When the charging system has an abnormal HVDC whose operating temperature value exceeds the third preset threshold value during charging of the charging device, it indicates that the current output power of the abnormal HVDC is high and there are certain safety hazards. In this case, in order to ensure the safe and reliable operation of the abnormal HVDC, the output power of the abnormal HVDC can be reduced according to the adjustment instruction, so that the operating temperature value of the abnormal HVDC can be reduced to the third preset threshold value.

[0114] See also Figure 3 , Figure 3 The topology diagram is as follows: each PDU in the charging cabinet is connected in parallel with a charging gun. Figure 3 In the topology diagram shown, 11 represents the power grid, 10 represents the cloud platform, 14 represents the device to be charged, 15 represents the charging cabinet, 111 represents the CCU, 121 represents the first HVDC, 122 represents the second HVDC, 123 represents the NHVDC, 131 represents the first PDU, 132 represents the second PDU, and 133 represents the NPDU. Each PDU in the charging cabinet 15 can charge a device to be charged 14 through a charging gun.

[0115] exist Figure 3In the topology diagram shown, if the operating temperature value of the device to be charged 14 exceeds the first preset threshold value when the first PDU 131 in the charging cabinet 15 charges the device to be charged 14, the output power of the first PDU 131 can be reduced at this time, so that the operating temperature value of the device to be charged 14 can be reduced to the first preset threshold value; if the operating temperature value of the second PDU 132 in the charging cabinet 15 charges the device to be charged 14, the second PDU 132 exceeds the second preset threshold value, the output power of the second HVDC 122 can be reduced at this time, so that the operating temperature value of the second PDU 132 can be reduced to the second preset threshold value; if the operating temperature value of the NHVDC 123 exceeds the third preset threshold value when the NPDU 133 in the charging system charges the device to be charged 14, the CCU 111 can reduce the output power of the NHVDC 123, so that the operating temperature value of the NHVDC 123 can be reduced to the third preset threshold value.

[0116] When the charging system is charging the device to be charged and an abnormal charging cabinet with an operating temperature value exceeding the fourth preset threshold value appears, it means that the power output of the abnormal charging cabinet is relatively high at the current moment, and the abnormal charging cabinet may be burned. In this case, in order to avoid the above situation, the charging system needs to reduce the power output of the abnormal charging cabinet according to the adjustment instruction, and notify the cloud platform to increase the output power of the PDU in other charging cabinets in the charging system for adjustment, so that the operating temperature value of the abnormal charging cabinet can be reduced to the fourth preset threshold value, and the overall output power of the charging system can meet the target power demand of the device to be charged.

[0117] See also Figure 4 , Figure 4 The topology diagram for connecting multiple charging cabinets in parallel with a single charging gun. Figure 4 In the charging system shown, 11 represents the power grid, 10 represents the cloud platform, 14 represents the device to be charged, 16 represents the first charging cabinet, 17 represents the second charging cabinet, 18 represents the third charging cabinet, 110 represents the centralized control, 111 represents the CCU, 120 represents HVDC1~HVDCn, 131 represents the first PDU, 132 represents the second PDU, and 133 represents the NPDU. The charging system is composed of the first charging cabinet 16, the second charging cabinet 17 and the third charging cabinet 18. Each PDU in the first charging cabinet 16, the second charging cabinet 17 and the third charging cabinet 18 can charge the device to be charged 14 through a charging gun.

[0118] if Figure 4In the charging system shown, when the operating temperature value of the first charging cabinet in the charging system is charging the charging device 14, it means that the output power of the first charging cabinet is relatively high. At this time, it is necessary to reduce the power output of the first charging cabinet, and notify the cloud platform 10 to increase the output power of the PDU in the second charging cabinet or the third charging cabinet, so that the operating temperature value of the first charging cabinet can be reduced to the fourth preset threshold value, and the overall output power of the first charging cabinet, the second charging cabinet and the third charging cabinet can meet the target demand power.

[0119] Obviously, through the technical solution provided in this embodiment, the safety and reliability of the charging system when charging the charging device can be further guaranteed.

[0120] As a preferred implementation, the control method further includes:

[0121] When the operating temperature value of the device to be charged drops to a first preset threshold, and / or the operating temperature value of the abnormal PDU drops to a second preset threshold, and / or the operating temperature value of the abnormal HVDC drops to a third preset threshold, and / or the operating temperature value of the abnormal charging cabinet drops to a fourth preset threshold, the output power of the charging PDU and / or the abnormal PDU and / or the abnormal HVDC and / or the abnormal charging cabinet is adjusted according to the adjustment instruction so that the overall output power of the charging system meets the target demand power.

[0122] In actual applications, when the operating temperature value of the device to be charged drops to the first preset threshold value, it means that the device to be charged has resumed normal operation. At this time, when the charging system charges the device to be charged, it does not need to consider the abnormal operating state of the charging PDU when charging the device to be charged. In this case, the output power of the charging system can be directly adjusted according to the adjustment instruction, and the overall output power of the charging system meets the target demand power.

[0123] When the operating temperature value of the abnormal PDU drops to the second preset threshold, it means that the abnormal PDU has recovered to a normal operating state. At this time, the charging system does not need to consider the abnormal operating state of the abnormal PDU when charging the charging device. In this case, the output power of the charging system can be directly adjusted according to the adjustment instruction, and the overall output power of the charging system meets the target demand power.

[0124] Similarly, when the operating temperature value of the abnormal HVDC drops to the third preset threshold, and / or the operating temperature value of the abnormal charging cabinet drops to the fourth preset threshold, it means that the abnormal HVDC and / or the abnormal charging cabinet have returned to normal operating state. At this time, when the charging system is charging the charging device, it is not necessary to consider the abnormal operating state of the abnormal HVDC and / or the abnormal charging cabinet. In this case, the output power of the abnormal HVDC and / or the abnormal charging cabinet can be directly adjusted according to the adjustment instruction, and the overall output power of the charging system meets the target demand power.

[0125] It is conceivable that when the operating temperature value of the device to be charged drops to a first preset threshold value, and / or the operating temperature value of the abnormal PDU drops to a second preset threshold value, and / or the operating temperature value of the abnormal HVDC drops to a third preset threshold value, and / or the operating temperature value of the abnormal charging cabinet drops to a fourth preset threshold value, the charging system does not need to consider the constraints of abnormal factors such as the charging PDU, abnormal PDU, abnormal HVDC and abnormal charging cabinet when charging the device to be charged, thereby further improving the flexibility of the charging system when charging the device to be charged.

[0126] Obviously, through the technical solution provided in this embodiment, the flexibility of the charging system when charging the charging device can be further improved.

[0127] As a preferred implementation, the above step: controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0128] If the operating temperature value of a specified component in the charging system changes from the warning temperature value to the target temperature value, the output power of the specified component is controlled according to the power adjustment model; wherein the expression of the power adjustment model is:

[0129]

[0130] Where, T 1 is the warning temperature value, T is the target temperature value, Pout is the limit power output value of the specified component when ensuring a safe operating state, and Pctrl is the power output of the specified component at T.

[0131] In this embodiment, in order to ensure the safe and stable operation of the charging system, when the operating temperature value of the target component in the charging system reaches the warning temperature value corresponding to the target component, it is necessary to issue an over-temperature warning to the target component and limit the power output of the target component; when the operating temperature value of the target component in the charging system reaches the set fault threshold corresponding to the target component, it is necessary to shut down the target component and stop the power output of the target component, and issue a corresponding alarm message. The target component refers to any component in the charging system, such as: charging gun plug connector, relay copper bus, PDU and HVDC, etc.

[0132] It should be noted that in actual applications, in order to ensure the safe operation of the target component, if the operating temperature value of the target component reaches the warning temperature value corresponding to the target component, the speed of the fan in the charging system can also be adjusted to achieve the purpose of rapid heat dissipation of the target component.

[0133] If the operating temperature value of a specified component in the charging system changes from the warning temperature value to the target temperature value, the output power of the specified component can be controlled according to the power adjustment model; wherein the expression of the power adjustment model is:

[0134]

[0135] Where, T 1 is the warning temperature value, T is the target temperature value, Pout is the limit power output value of the specified component when ensuring a safe operating state, and Pctrl is the power output of the specified component at T.

[0136] Obviously, the technical solution provided in this embodiment can ensure the safe and stable operation of each component in the charging system.

[0137] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation mode, the above step: controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0138] If the target demand power does not exceed the maximum power that the target charging cabinet in the charging system can output, the output power of the PDU in the target charging cabinet is controlled according to the adjustment instruction.

[0139] It is understandable that in actual applications, a plurality of charging cabinets connected in parallel are usually provided in the charging system. In this case, if the target power demand of the device to be charged does not exceed the maximum power that the target charging cabinet in the charging system can output, the charging system can control the output power of the PDU in the target charging cabinet according to the adjustment instruction. The target charging cabinet refers to any charging cabinet in the charging system.

[0140] It can be imagined that under this setting, other charging cabinets in the charging system except the target charging cabinet can be kept idle, so that the utilization rate of the PDU module in the charging system can be improved while meeting the charging needs of the charged equipment.

[0141] As a preferred implementation, the above step: if the target demand power does not exceed the maximum power that the target charging cabinet in the charging system can output, the process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction includes:

[0142] If the target demand power does not exceed the output power of the target PDU in the target charging cabinet, the output power of the target PDU is controlled according to the adjustment instruction.

[0143] If the target power demand of the device to be charged does not exceed the output power of the target PDU in the target charging cabinet, in this case, in order to further improve the utilization rate of the PDU module of the charging system, the charging system can directly control the output power of the target PDU according to the adjustment instruction, and let all other PDUs in the target charging cabinet except the target PDU be idle. Among them, the target PDU refers to any PDU in the target charging cabinet.

[0144] As a preferred implementation, the above step: if the target demand power does not exceed the maximum power that the target charging cabinet in the charging system can output, the process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction includes:

[0145] If the target demand power exceeds the output power of the target PDU in the target charging cabinet, but does not exceed the maximum power that the target charging cabinet can output, a PDU is selected from the target charging cabinet according to the target demand power to obtain a screening PDU;

[0146] The output power of the screening PDU is controlled according to the adjustment instruction so that the output power of the screening PDU meets the target required power.

[0147] If the target power demand of the device to be charged exceeds the output power of the target PDU in the target charging cabinet, but the target power demand of the device to be charged does not exceed the maximum power that the target charging cabinet can output, in this case, in order to meet the charging needs of the device to be charged, multiple PDUs in the charging system are required to charge the device to be charged together.

[0148] Specifically, the charging system needs to select a PDU from the target charging cabinet according to the target power demand of the device to be charged to obtain a screened PDU; then, the charging system controls the output power of the screened PDU according to the adjustment instruction, so that the output power of the screened PDU can meet the target power demand of the device to be charged.

[0149] As a preferred implementation, the above step: the process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction includes:

[0150] Real-time monitoring of the operating status of the PDU in the target charging cabinet;

[0151] If an alarm PDU that does not meet the target constraint conditions appears in the target charging cabinet, the output power of the alarm PDU is reduced according to the adjustment instruction, and the PDU in the target charging cabinet that is in an idle state is started to make the output power of the target charging cabinet meet the target demand power.

[0152] In order to further ensure the safe and stable operation of the charging system, when the charging system is charging the charging equipment, it is also necessary to monitor the operation status of the PDU in the target charging cabinet in real time.

[0153] If an alarm PDU that does not meet the target constraint conditions appears in the target charging cabinet, it means that the alarm PDU is overloaded and cannot maintain normal operation. In this case, it is necessary to reduce the output power of the alarm PDU according to the adjustment instruction, and in order to meet the target power demand of the device to be charged, it is also necessary to start the PDU in the idle state in the target charging cabinet while reducing the output power of the alarm PDU, so that the output power of the target charging cabinet can meet the charging demand of the device to be charged.

[0154] It should be noted that in actual applications, if the target charging cabinet needs to increase the number of PDUs to increase its power output, the target charging cabinet can directly start the added PDU to quickly output power; if the target charging cabinet needs to reduce the number of PDUs to reduce its power output, the hysteresis power value can be added to the output power of each PDU to reduce the power output, thereby preventing power fluctuations when the target charging cabinet adjusts the number of PDUs.

[0155] Obviously, through the technical solution provided in this embodiment, it can be ensured that the charging system can meet the charging needs of the device to be charged in various operating scenarios.

[0156] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation mode, the above step: controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes:

[0157] If the target demand power exceeds the maximum power that the target charging cabinet in the charging system can output, the output power of the target charging cabinet and the idle PDU in other charging cabinets is controlled according to the adjustment instruction so that the output power of the target charging cabinet and the idle PDU meets the target demand power.

[0158] In actual applications, when the device to be charged is in an application scenario where multiple charging cabinets are connected in parallel with a single gun, if the target demand power of the device to be charged exceeds the maximum power that the target charging cabinet in the charging system can output, it means that the maximum power that a single charging cabinet in the charging system can output cannot meet the charging demand of the device to be charged.

[0159] In this case, the charging system can control the output power of the idle PDUs in the target charging cabinet and other charging cabinets according to the adjustment instructions, so that the output power of the idle PDUs in the target charging cabinet and other charging cabinets can meet the target required power of the equipment to be charged.

[0160] In order to enable those skilled in the art to better understand the implementation principle of the technical solution provided by this embodiment, the above situation is specifically described here through an application scenario embodiment. Figure 4 , Figure 4 The topology diagram for connecting multiple charging cabinets in parallel with a single charging gun. Figure 4 In the topology diagram shown, the charging system is provided with a first charging cabinet 16, a second charging cabinet 17 and a third charging cabinet 18, each of which is provided with a CCU 11, HVDC1~HVDCn120, a first PDU 131, a second PDU 132, and a third NPDU 133. The first charging cabinet 16, the second charging cabinet 17 and the third charging cabinet 18 jointly charge the device to be charged 14.

[0161] See also Figure 5 , Figure 5 For Figure 4 The flowchart shown is for charging a device to be charged when multiple charging cabinets are connected in parallel with a single charging gun. The method includes:

[0162] S101: When the charging system receives a charging request from a device to be charged, the charging system determines a target required power of the device to be charged;

[0163] S102: Determine whether the target required power is less than the output power of the first PDU in the first charging cabinet; if so, execute step S103; if not, execute step S104;

[0164] Step S103: Using the first PDU in the first charging cabinet to charge the device to be charged;

[0165] Step S104: Determine whether the target required power is less than the total output power of the first charging cabinet; if so, execute step S105; if not, execute step S106;

[0166] Step S105: Using the first charging cabinet to charge the device to be charged;

[0167] Step S106: Determine whether the target required power is less than the total output power of the first charging cabinet and the second charging cabinet; if so, execute step S107; if not, execute step S108;

[0168] Step S107: Using the first charging cabinet and the second charging cabinet to charge the device to be charged;

[0169] Step S108: Determine whether the target required power is less than the total output power of the first charging cabinet, the second charging cabinet and the third charging cabinet; if so, execute S109;

[0170] Step S109: Use the first charging cabinet, the second charging cabinet, and the third charging cabinet to charge the device to be charged.

[0171] Obviously, through the technical solution provided in this embodiment, the charging needs of the equipment to be charged can also be met when multiple charging cabinets are connected in parallel with a single gun.

[0172] See also Figure 6 , Figure 6 This is a structural diagram of a device for controlling output power of a charging system provided by an embodiment of the present invention, the device comprising:

[0173] The power determination module 21 is used to determine the target required power of the device to be charged and the maximum power that the battery pack in the device to be charged can withstand when receiving a charging request from the device to be charged;

[0174] A condition determination module 22, for determining target constraint conditions for safe operation of the charging system according to grid load, distribution capacity, component temperature and component status;

[0175] The instruction generation module 23 is used to generate an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand and the target constraint condition;

[0176] The power adjustment module 24 is used to control the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system.

[0177] Preferably, the condition determination module 22 includes:

[0178] A first determination submodule, used to obtain a first sub-constraint condition according to the maximum load that the power grid can bear;

[0179] A second determination submodule, configured to obtain a second sub-constraint condition according to the maximum capacity of the distribution transformer;

[0180] A third determination submodule, configured to obtain a third sub-constraint condition according to a temperature threshold that each component in the charging system can withstand during operation;

[0181] The fourth determination submodule is used to obtain a fourth sub-constraint condition according to the maximum power that the devices in each component in the charging system can withstand under a safe operating state.

[0182] Preferably, the instruction generation module 23 includes:

[0183] A weight setting submodule, used to set corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition, respectively, to obtain a first weight value, a second weight value, a third weight value and a fourth weight value for adjusting the output power of the charging system;

[0184] The instruction generation submodule is used to generate an adjustment instruction for adjusting the output power of the charging system based on the target required power as the output target and the first weight value, the second weight value, the third weight value and the fourth weight value for adjusting the output power of the charging system.

[0185] Preferably, the weight setting submodule includes:

[0186] The weight setting unit is used to set corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition according to the importance of affecting the safe operation of the charging system or the TOPSIS algorithm or the principal component analysis method or the hierarchical analysis method.

[0187] Preferably, the power adjustment module 24 includes:

[0188] A PDU adjustment unit, configured to search for a PDU for charging the device to be charged according to an adjustment instruction, obtain a charging PDU, and reduce an output power of the charging PDU, so that the operating temperature value of the device to be charged drops to the first preset threshold value if the operating temperature value of the device to be charged exceeds a first preset threshold value during the charging process of the device to be charged by the charging system;

[0189] The HVDC adjustment unit is used to reduce the output power of the HVDC connected to the abnormal PDU according to the adjustment instruction if an abnormal PDU with an operating temperature value exceeding a second preset threshold value appears during the charging process of the charging system for the charging device, so that the operating temperature value of the abnormal PDU drops to the second preset threshold value;

[0190] a temperature adjustment unit, configured to reduce the output power of the abnormal HVDC according to an adjustment instruction if an abnormal HVDC having an operating temperature value exceeding a third preset threshold value occurs during the charging process of the charging system for the charging device, so that the operating temperature value of the abnormal HVDC drops to the third preset threshold value;

[0191] The cabinet adjustment unit is used to reduce the power output of the abnormal charging cabinet according to the adjustment instruction if an abnormal charging cabinet with an operating temperature value exceeding the fourth preset threshold value appears during the charging process of the charging system for the charging device, and notify the cloud platform to increase the output power of the PDU in other charging cabinets in the charging system, so that the operating temperature value of the abnormal charging cabinet drops to the fourth preset threshold value, and the overall output power of the charging system meets the target demand power.

[0192] Preferably, the power adjustment module 24 includes:

[0193] The component control unit is used to control the output power of the specified component according to the power adjustment model if the operating temperature value of the specified component in the charging system changes from the warning temperature value to the target temperature value; wherein the expression of the power adjustment model is:

[0194]

[0195] Where, T 1 is the warning temperature value, T is the target temperature value, Pout is the limit power output value of the specified component when ensuring a safe operating state, and Pctrl is the power output of the specified component at T.

[0196] Preferably, the power adjustment module 24 includes:

[0197] The PDU adjustment submodule is used to control the output power of the PDU in the target charging cabinet according to the adjustment instruction if the target demand power does not exceed the maximum power that the target charging cabinet in the charging system can output.

[0198] Preferably, the PDU adjustment submodule includes:

[0199] The target PDU adjustment unit is used to control the output power of the target PDU according to the adjustment instruction if the target demand power does not exceed the output power of the target PDU in the target charging cabinet.

[0200] Preferably, the PDU adjustment submodule includes:

[0201] A PDU screening unit, for selecting a PDU from the target charging cabinet according to the target demand power to obtain a screened PDU if the target demand power exceeds the output power of the target PDU in the target charging cabinet but does not exceed the maximum power that the target charging cabinet can output;

[0202] The screening PDU adjustment unit is used to control the output power of the screening PDU according to the adjustment instruction so that the output power of the screening PDU meets the target required power.

[0203] Preferably, the power adjustment module 23 includes:

[0204] PDU monitoring unit, used to monitor the operation status of the PDU in the target charging cabinet in real time;

[0205] The cabinet power adjustment unit is used to reduce the output power of the alarm PDU according to the adjustment instruction if an alarm PDU that does not meet the target constraint conditions appears in the target charging cabinet, and start the PDU in the idle state in the target charging cabinet to make the output power of the target charging cabinet meet the target demand power.

[0206] Preferably, the power adjustment module 24 includes:

[0207] The system power adjustment unit is used to control the output power of the target charging cabinet and the idle PDU in other charging cabinets according to the adjustment instruction if the target demand power exceeds the maximum power that the target charging cabinet can output in the charging system, so that the output power of the target charging cabinet and the idle PDU meets the target demand power.

[0208] A device for controlling output power of a charging system provided in an embodiment of the present invention has the beneficial effects of the method for controlling output power of a charging system disclosed above.

[0209] See also Figure 7 , Figure 7 This is a structural diagram of a charging system output power control device provided by an embodiment of the present invention, the device comprising:

[0210] A memory 31, used for storing computer programs;

[0211] The processor 32 is used to implement the steps of the method for controlling the output power of a charging system disclosed above when executing a computer program.

[0212] A device for controlling output power of a charging system provided in an embodiment of the present invention has the beneficial effects of the method for controlling output power of a charging system disclosed above.

[0213] Correspondingly, an embodiment of the present invention further discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of a method for controlling the output power of a charging system disclosed above are implemented.

[0214] A computer-readable storage medium provided in an embodiment of the present invention has the beneficial effects of the aforementioned method for controlling the output power of a charging system disclosed above.

[0215] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the 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.

[0216] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0217] The above is a detailed introduction to a method, device, equipment and medium for controlling the output power of a charging 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. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for controlling the output power of a charging system, It is characterized in that include: When receiving a charging request from a device to be charged, determining a target required power of the device to be charged and determining a maximum power that a battery pack in the device to be charged can withstand; Determine the target constraints under which the charging system can operate safely based on grid load, distribution capacity, component temperature, and component status; generating an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand, and the target constraint condition; The power adjustment module of the charging system is controlled according to the adjustment instruction to adjust the output power of the charging system.

2. The method for controlling the output power of a charging system according to claim 1, It is characterized in that The process of determining the target constraint conditions for the safe operation of the charging system according to the grid load, the distribution capacity, the component temperature and the component state includes: According to the maximum load that the power grid can bear, a first sub-constraint condition is obtained; According to the maximum capacity of the distribution transformer, the second sub-constraint is obtained; Obtaining a third sub-constraint condition according to a temperature threshold that each component in the charging system can withstand during operation; The fourth sub-constraint condition is obtained according to the maximum power that the devices in each component in the charging system can withstand in a safe operating state.

3. The method for controlling the output power of a charging system according to claim 2, It is characterized in that The process of generating an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand, and the target constraint condition includes: respectively setting corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition, and the fourth sub-constraint condition to obtain a first weight value, a second weight value, a third weight value, and a fourth weight value for adjusting the output power of the charging system; The target required power is used as an output target, and an adjustment instruction for adjusting the output power of the charging system is generated according to the first weight value, the second weight value, the third weight value, and the fourth weight value for adjusting the output power of the charging system.

4. The method for controlling the output power of a charging system according to claim 3, It is characterized in that The process of setting corresponding weight values ​​for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition, and the fourth sub-constraint condition respectively includes: According to the importance of affecting the safe operation of the charging system or the TOPSIS algorithm or the principal component analysis method or the hierarchical analysis method, corresponding weight values ​​are set for the first sub-constraint condition, the second sub-constraint condition, the third sub-constraint condition and the fourth sub-constraint condition respectively.

5. The method for controlling the output power of a charging system according to claim 1, It is characterized in that The process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes: If the operating temperature value of the device to be charged exceeds a first preset threshold value during the process of the charging system charging the device to be charged, the PDU for charging the device to be charged is searched according to the adjustment instruction to obtain the charging PDU, and the output power of the charging PDU is reduced so that the operating temperature value of the device to be charged drops to the first preset threshold value; If an abnormal PDU with an operating temperature value exceeding a second preset threshold value appears during the charging process of the charging system for the device to be charged, the output power of the HVDC connected to the abnormal PDU is reduced according to the adjustment instruction so that the operating temperature value of the abnormal PDU drops to the second preset threshold value; If an abnormal HVDC having an operating temperature value exceeding a third preset threshold value occurs during the charging process of the charging system for the device to be charged, the output power of the abnormal HVDC is reduced according to the adjustment instruction so that the operating temperature value of the abnormal HVDC drops to the third preset threshold value; If an abnormal charging cabinet whose operating temperature value exceeds the fourth preset threshold value appears during the charging system charging the device to be charged, the power output of the abnormal charging cabinet is reduced according to the adjustment instruction, and the cloud platform is notified to increase the output power of the PDU in other charging cabinets in the charging system, so that the operating temperature value of the abnormal charging cabinet drops to the fourth preset threshold value, and the overall output power of the charging system meets the target demand power.

6. The method for controlling the output power of a charging system according to claim 5, It is characterized in that Also includes: When the operating temperature value of the device to be charged drops to the first preset threshold, and / or the operating temperature value of the abnormal PDU drops to the second preset threshold, and / or the operating temperature value of the abnormal HVDC drops to the third preset threshold, and / or the operating temperature value of the abnormal charging cabinet drops to the fourth preset threshold, the output power of the charging PDU and / or the abnormal PDU and / or the abnormal HVDC and / or the abnormal charging cabinet is adjusted according to the adjustment instruction so that the overall output power of the charging system meets the target demand power.

7. A method for controlling output power of a charging system according to claim 5, It is characterized in that The process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes: If the operating temperature value of the designated component in the charging system changes from the warning temperature value to the target temperature value, the output power of the designated component is controlled according to the power adjustment model; wherein the expression of the power adjustment model is: Where, T 1 is the warning temperature value, T is the target temperature value, Pout is the limit power output value of the designated component when ensuring a safe operating state, and Pctrl is the power output by the designated component at T.

8. The method for controlling the output power of a charging system according to claim 1, It is characterized in that The process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes: If the target required power does not exceed the maximum power that can be output by the target charging cabinet in the charging system, the output power of the PDU in the target charging cabinet is controlled according to the adjustment instruction.

9. The method for controlling the output power of a charging system according to claim 8, It is characterized in that The process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction if the target required power does not exceed the maximum power that can be output by the target charging cabinet in the charging system includes: If the target required power does not exceed the output power of the target PDU in the target charging cabinet, the output power of the target PDU is controlled according to the adjustment instruction.

10. The method for controlling the output power of a charging system according to claim 8, It is characterized in that The process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction if the target required power does not exceed the maximum power that can be output by the target charging cabinet in the charging system includes: If the target required power exceeds the output power of the target PDU in the target charging cabinet, but does not exceed the maximum power that the target charging cabinet can output, a PDU is selected from the target charging cabinet according to the target required power to obtain a screened PDU; The output power of the screening PDU is controlled according to the adjustment instruction so that the output power of the screening PDU meets the target required power.

11. The method for controlling the output power of a charging system according to claim 8, It is characterized in that The process of controlling the output power of the PDU in the target charging cabinet according to the adjustment instruction includes: Real-time monitoring of the operation status of the PDU in the target charging cabinet; If an alarm PDU that does not meet the target constraint condition appears in the target charging cabinet, the output power of the alarm PDU is reduced according to the adjustment instruction, and the PDU in the target charging cabinet that is in an idle state is started so that the output power of the target charging cabinet meets the target demand power.

12. The method for controlling the output power of a charging system according to claim 1, It is characterized in that The process of controlling the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system includes: If the target demand power exceeds the maximum power that the target charging cabinet in the charging system can output, the output power of the target charging cabinet and the idle PDU in other charging cabinets is controlled according to the adjustment instruction so that the output power of the target charging cabinet and the idle PDU meets the target demand power.

13. A device for controlling the output power of a charging system, It is characterized in that include: A power determination module, configured to determine the target required power of the device to be charged and the maximum power that the battery pack in the device to be charged can withstand when receiving a charging request from the device to be charged; A condition determination module is used to determine the target constraint conditions for the safe operation of the charging system based on the grid load, distribution capacity, component temperature and component status; an instruction generation module, configured to generate an adjustment instruction for adjusting the output power of the charging system according to the target required power, the maximum power that the battery pack can withstand, and the target constraint condition; The power adjustment module is used to control the power adjustment module of the charging system according to the adjustment instruction to adjust the output power of the charging system.

14. A device for controlling the output power of a charging system, It is characterized in that include: Memory for storing computer programs; A processor, configured to implement the steps of a method for controlling the output power of a charging system as claimed in any one of claims 1 to 12 when executing the computer program.

15. A computer-readable storage medium, It is 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 method for controlling the output power of a charging system as claimed in any one of claims 1 to 12 are implemented.

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