Method for regulating charging power, multi-phase power generation system and charging device
By obtaining the grid connection point power and adjusting the charging power of the multiphase power generation system based on preset thresholds, the problem of limited charging of charging equipment caused by load imbalance is solved, achieving the effect of fully utilizing the energy of the multiphase power generation system, and reducing installation difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI SIGE DIGITAL TECHNOLOGY CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-06-05
AI Technical Summary
In multiphase power generation systems, load power imbalance leads to limited charging power of charging equipment, making it impossible to fully utilize the remaining energy of the multiphase power generation system. Existing methods rely on manual adjustment of the load access sequence during the installation phase, which is difficult to solve the imbalance problem caused by the randomness and dynamic changes of the load.
By acquiring the grid connection point power of each phase of the multiphase power generation system, calculating the average grid connection point power, and adjusting the maximum allowable charging power of each phase in real time based on the preset grid connection point power threshold, dynamic balance of charging power is achieved using control equipment or charging equipment.
It achieves charging power balance under random and dynamic changes in load operation, makes full use of the surplus energy of multiphase power generation system, and reduces installation difficulty and cost.
Smart Images
Figure CN122159458A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electronic power technology, and in particular to a method for regulating charging power, a multiphase power generation system, and a charging device. Background Technology
[0002] In multiphase power generation systems, charging equipment draws power from the AC bus to charge electrical devices. However, in practical applications, each phase of a multiphase power generation system can be connected to a load. While the power generated by the system meets the load requirements, the surplus power is then transferred to electrical devices such as new energy vehicles using the charging equipment. Due to the diversity and randomness of the loads, power imbalances in the multiphase loads are prone to occur. The surplus power in each phase is unbalanced. To ensure that the charging equipment draws all its power from the surplus power of the multiphase power generation system, the phase with the smallest surplus power is used as a reference phase, and the charging equipment uses the surplus power of this reference phase as the maximum allowable charging power per phase. However, this results in limited charging power for the charging equipment and an inability to fully utilize the surplus energy of the multiphase power generation system.
[0003] To address this situation, the existing approach is to distribute the load as evenly as possible across each phase of the multiphase power generation system during the system installation phase. By rationally allocating the load, efforts are made to maintain power balance across the multiphase loads, thereby reducing the difference in remaining power supply capacity of each phase due to load imbalance.
[0004] However, the above methods place high demands on installers. Before system installation, installers need to identify the power of each load and allocate them according to the power parameters of different loads to keep the total power of the loads connected to each phase as balanced as possible. This increases the difficulty and cost of installation and requires high installation accuracy. Moreover, in practical applications, the power of some loads is unstable, and the loads connected to each phase are not all turned on at the same time. The operating state of the loads is random and dynamic. Under these circumstances, simply relying on manual adjustment of the load connection phase sequence during the installation phase cannot fundamentally solve the problem of multiphase load power imbalance and still cannot fully utilize the surplus energy of the multiphase power generation system. Summary of the Invention
[0005] This invention provides a method for adjusting charging power to solve the problem of insufficient utilization of residual energy in a multiphase power generation system due to multiphase load power imbalance. The method is applied to a multiphase power generation system, which includes a charging device. The method includes: Obtain the grid connection point power of each phase of the multiphase power generation system to obtain the average grid connection point power; Based on the average grid connection point power and the preset grid connection point power threshold for each phase, the maximum allowable charging power for each phase is determined. Adjust the maximum allowable charging power of the charging equipment according to the maximum allowable charging power of each phase.
[0006] Optionally, based on the average grid connection point power and the preset grid connection point power threshold for each phase, the maximum allowable charging power for each phase is determined, including: The average grid connection point power is compared with the preset grid connection point power threshold for each phase; If the average grid connection point power is less than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be increased. If the average grid connection point power is greater than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be reduced. If the average grid connection point power is equal to the preset grid connection point power threshold of the phase, then the maximum allowable charging power of the phase is obtained.
[0007] Optionally, the maximum allowable charging power of the charging device is adjusted according to the maximum allowable charging power of each phase, including: The maximum allowable charging power of the charging equipment is adjusted based on the minimum value among the maximum allowable charging power of each phase.
[0008] Optionally, after adjusting the maximum allowable charging power of the charging device according to the maximum allowable charging power of each phase, the method further includes: The maximum allowable charging power of the charging device is sent to the user device, so that the user device can control its own charging power according to the maximum allowable charging power of the charging device.
[0009] Optionally, the sum of the preset grid connection point power thresholds for each phase is a fixed value.
[0010] Optionally, before obtaining the grid connection point power of each phase of the multiphase power generation system and obtaining the average grid connection point power, the following steps are also included: Determine whether the multiphase power generation system is in surplus charging mode, wherein surplus charging mode refers to the mode of using the surplus power of the multiphase power generation system as the energy source of the charging equipment; To obtain the grid connection point power of each phase of a multiphase power generation system and thus the average grid connection point power, the following steps are taken: When the multiphase power generation system is in surplus charging mode, the grid connection point power of each phase of the multiphase power generation system is obtained to obtain the average grid connection point power.
[0011] This invention also provides a multiphase power generation system to solve the problem of unbalanced multiphase load power in a multiphase power generation system, which leads to the inability to fully utilize the remaining energy of the multiphase power generation system. The multiphase power generation system includes a multiphase AC bus, charging equipment, power generation equipment, inverter equipment, and control equipment. The power generation equipment is connected to the input side of the inverter equipment, and the output side of the inverter equipment is connected to the AC power grid through a multi-phase AC bus. The input side of the charging device is connected to at least one phase of the multiphase AC bus, and the output side of the charging device is connected to the electrical equipment. The control device or the charging device is used to implement the above-described method for adjusting the charging power. Optionally, the multiphase power generation system further includes an energy storage device; The energy storage device is connected to the inverter device.
[0012] Optionally, the multiphase power generation system further includes multiple power acquisition devices, each of which is connected to a phase AC bus at one end and to the AC power grid at the other end.
[0013] This invention also provides a charging device to solve the problem of insufficient utilization of the remaining energy in a multiphase power generation system due to the imbalance of multiphase load power. The charging device is applied to a multiphase power generation system and includes: The average power determination module is used to obtain the grid connection point power of each phase of the multiphase power generation system and obtain the average grid connection point power. The first power regulation module is used to determine the maximum allowable charging power of each phase based on the average grid connection point power and the preset grid connection point power threshold of each phase. The second power determination module is used to adjust the maximum allowable charging power of the charging device according to the maximum allowable charging power of each phase.
[0014] In this embodiment of the invention, the average grid-connected power is obtained by acquiring the grid-connected power of each phase of the multiphase power generation system; based on the average grid-connected power and the preset grid-connected power thresholds for each phase, the maximum allowable charging power of each phase is determined; and the maximum allowable charging power of the charging equipment is adjusted according to the maximum allowable charging power of each phase. Thus, by utilizing the average grid-connected power of the multiphase power generation system and combining it with the preset grid-connected power thresholds for each phase, the maximum allowable charging power of each phase can be adjusted in real time. This allows for real-time adjustment of the maximum allowable charging power of the charging equipment based on the load operating status of each phase, thereby solving the problem that the charging power of the charging equipment is limited due to the unbalanced load power connected to each phase and the randomness and dynamic changes in the load operating status, and the inability to fully utilize the remaining energy of the multiphase power generation system. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] In the attached diagram: Figure 1 A structural diagram of a multiphase power generation system provided in an embodiment of the present invention; Figure 2 A structural diagram of another multiphase power generation system provided in an embodiment of the present invention; Figure 3 This is a structural diagram of another multiphase power generation system provided in an embodiment of the present invention; Figure 4 A flowchart illustrating a method for adjusting charging power according to an embodiment of the present invention; Figure 5 The maximum allowable charging power regulation loop diagram for each phase is provided for embodiments of the present invention. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.
[0018] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.
[0019] In the description of this specification, the terms "first" and "second," etc., are used to distinguish different objects or to distinguish different treatments of the same object, rather than to describe a specific order of objects.
[0020] In the description of this specification, "and / or" is merely a way of describing the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.
[0021] This invention provides a charging power adjustment scheme for a multiphase power generation system. It eliminates the need for manual adjustment of the load connection phase sequence during the installation phase. It enables real-time adjustment of the maximum allowable charging power of the charging equipment based on the grid connection point power of each phase during the operation of the multiphase power generation system, thereby ensuring full utilization of the remaining energy of the multiphase power generation system.
[0022] First, the multiphase power generation system in the embodiments of the present invention can refer to an AC system with two or more output phases, such as a two-phase power generation system or a three-phase power generation system.
[0023] Figure 1 This is a structural diagram of a multiphase power generation system provided in an embodiment of the present invention. Figure 1 As shown, this multiphase power generation system is a three-phase power generation system, and its power distribution form is a three-phase five-wire system, that is, it includes a three-phase AC bus (A phase line L). A Phase B line L B C-phase line L C And a neutral line (N) and a protective grounding line (Pe).
[0024] The three-phase power generation system also includes charging equipment, power generation equipment, inverter equipment, and control equipment (not shown in the figure); wherein, the power generation equipment is connected to the input side of the inverter equipment, and the output side of the inverter equipment is connected to the AC power grid through the three-phase AC bus and the protective grounding wire Pe; the input side of the charging equipment is connected to the three-phase AC bus and the protective grounding wire Pe, and the output side of the charging equipment is connected to the electrical equipment.
[0025] It should be noted that the power distribution of the above three-phase power generation system can also be a three-phase four-wire system, that is, including phase A line L. A Phase B line L B C-phase line L C It can be a three-phase three-wire system with four AC busbars, including the neutral line N, or the A-phase line L. A Phase B line L B and C phase line L C The charging equipment for the aforementioned three-phase power generation system can also be connected to only one or two of the three phases. In specific applications, the connection method can be determined according to the wiring configuration of the charging equipment.
[0026] In one embodiment, such as Figure 2 As shown, the multiphase power generation system described above may also include an energy storage device; the energy storage device is connected to the inverter device.
[0027] In one embodiment, such as Figure 3As shown, the aforementioned multiphase power generation system may also include multiple power acquisition devices (e.g., a three-phase power generation system includes three power acquisition devices). One end of each power acquisition device is connected to one phase AC bus, and the other end is connected to the AC power grid. The power acquisition device can be an electricity meter, used to obtain the grid connection point power of the connected phase.
[0028] based on Figures 1-3 In any of the multiphase power generation systems shown, each phase is connected to a load, such as load A connected to phase A, load B connected to phase B, and load C connected to phase C. Because the load power connected to each phase is unbalanced, and the operating state of the loads is random and dynamically changing, the remaining power supply capacity of each phase fluctuates and is uneven in real time. This limits the charging power of the charging equipment to the electrical devices and prevents the full utilization of the remaining energy in the multiphase power generation system.
[0029] Therefore, this embodiment of the invention also provides a method for adjusting charging power. This method is used to solve the problem that the charging power of the charging equipment to the electrical equipment is limited and the remaining energy of the multiphase power generation system cannot be fully utilized because the load power connected to each phase is unbalanced and the operating state of the load is random and dynamically changing. Moreover, this embodiment of the invention has lower requirements for installation personnel and installation accuracy, thus reducing installation difficulty and installation cost.
[0030] In this embodiment of the invention, the method for adjusting charging power can be implemented through the control equipment or charging equipment in the multiphase power generation system described above. Figure 4 A flowchart illustrating a method for adjusting charging power according to an embodiment of the present invention. Figure 4 As shown, the method may include: Step 401: Obtain the grid connection point power of each phase of the multiphase power generation system to obtain the average grid connection point power; Step 402: Determine the maximum allowable charging power for each phase based on the average grid connection point power and the preset grid connection point power threshold for each phase; Step 403: Adjust the maximum allowable charging power of the charging device according to the maximum allowable charging power of each phase.
[0031] The following is combined with Figures 1-4 The method for adjusting the charging power described above will be explained.
[0032] In step 401 above, the grid connection point power of each phase of the multiphase power generation system is obtained, and the average grid connection point power is calculated based on the grid connection point power of each phase.
[0033] The grid connection point power is the real-time active power at the common connection point of each phase of the AC power grid and the multiphase power generation system. The average grid connection point power is obtained by summing the grid connection point power of each phase and dividing by the number of phases.
[0034] In practical implementation, the grid connection point power of each phase can be achieved through... Figure 3 The power is collected by the power acquisition device shown; or, the grid connection point power of each phase can also be calculated by the grid connection point voltage and current of each phase collected by the inverter device. For specific calculation methods, please refer to the existing technology, which will not be elaborated here.
[0035] refer to Figure 3 The grid connection power of phase A is P. A_PCC The grid connection point power of phase B is P. B_PCC The grid connection point power of phase C is P C_PCC Average grid connection point power P AVERAGE_PCC =(P A_PCC +P B_PCC +P C_PCC )÷3.
[0036] In step 402 above, the maximum allowable charging power of each phase is determined based on the average grid connection point power and the preset grid connection point power threshold for each phase.
[0037] The preset grid connection point power threshold for each phase represents the pre-set power threshold for that phase to purchase electricity from the AC grid or to sell electricity to the AC grid. It is the final target value of the grid connection point power achieved by adjusting the maximum allowable charging power of each phase. The sum of the preset grid connection point power thresholds for each phase can be a fixed value. That is, it is only necessary to control the total power purchase or total power sale of all phases of the system, allowing a certain phase to purchase electricity, sell electricity, or neither, etc. Furthermore, the power purchase or power sale threshold for each phase can be set based on actual needs, ensuring that the sum is a fixed value.
[0038] For example, the preset grid connection point power threshold for phase A is P. A_REF The preset grid connection power threshold for phase B is P. B_REF The preset grid connection power threshold for phase C is P. C_REF P A_REF +P B_REF +P C_REF =Q, where Q is a fixed value. If Q=0, it means that it is not allowed to buy electricity from the AC grid or sell electricity to the AC grid. If Q>0, it means that it is allowed to buy electricity from the AC grid, and the total power of the three-phase electricity purchase shall not exceed Q. If Q<0, it means that it is allowed to sell electricity to the AC grid, and the total power of the three-phase electricity sale shall not exceed the absolute value of Q.
[0039] In practical implementation, the maximum allowable charging power of each phase in a multiphase power generation system is determined based on the average grid connection point power and the preset grid connection point power threshold for that phase. Specifically, a negative feedback regulation method can be used to determine the maximum allowable charging power of each phase. The average grid connection point power is used as the feedback signal, and the maximum allowable charging power of each phase is continuously adjusted in real time until the target is reached, thus obtaining the maximum allowable charging power of each phase.
[0040] In one embodiment, step 402 above may specifically include: The average grid connection point power is compared with the preset grid connection point power threshold for each phase; If the average grid connection point power is less than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be increased. If the average grid connection point power is greater than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be reduced. If the average grid connection point power is equal to the preset grid connection point power threshold of the phase, then the maximum allowable charging power of the phase is obtained.
[0041] In practice, Figure 5 This is the maximum allowable charging power control loop diagram for each phase in this embodiment of the invention, based on... Figure 5 It can be seen that the control loops for the maximum allowable charging power of each phase operate independently. Specifically, taking phase A as an example, firstly, the comparator of the phase A control loop compares the average grid-connected power P. AVERAGE_PCC The preset grid connection point power threshold P of phase A A_REF Calculate the error P between the two. A_REF -P AVERAGE_PCC Then, the controller processes the error according to a preset control algorithm (such as proportional-integral control algorithm). If the error is greater than 0, it indicates that the average grid-connected power P... AVERAGE_PCC The power threshold P at the grid connection point of phase A is less than the preset power threshold of phase A. A_REF If the error is less than 0, then the maximum allowable charging power of phase A should be increased; if the error is less than 0, it indicates that the average grid connection point power P AVERAGE_PCC The power threshold P at the grid connection point of phase A is greater than the preset power threshold of phase A. A_REF If the error is zero, then the maximum allowable charging power of phase A should be reduced; if the error is zero, then the average grid connection point power P is zero. AVERAGE_PCC Equal to the preset grid connection point power threshold P of phase A A_REF The maximum allowable charging power P of phase A output by the control loop A_CHARGE_MAX Phase B of P BVERAGE_PCC P and C phase CVERAGE_PCC The implementation process is similar to that of the A-phase control loop, and will not be elaborated further here.
[0042] In this way, by taking the average grid connection point power equal to the preset grid connection point power threshold of each phase as the goal, the maximum allowable charging power of each phase can be continuously adjusted in real time, which can improve the accuracy of the maximum allowable charging power of each phase, and the adjustment logic is simple and efficient.
[0043] In step 403 above, the maximum allowable charging power of the charging device can be determined and adjusted based on the maximum allowable charging power of each phase.
[0044] In practice, the maximum allowable charging power P of the charging equipment can be determined based on the minimum value among the maximum allowable charging power of each phase. CHARGE_MAX That is, P CHARGE_MAX =Number of phases × min(P) A_CHARGE_MAX P B_CHARGE_MAX P C_CHARGE_MAX In other words, the maximum allowable charging power of each phase is limited to the minimum value. Therefore, the maximum allowable charging power of the charging device is the number of phases multiplied by the minimum value.
[0045] In one embodiment, after step 103 above, the following may also be included: The maximum allowable charging power of the charging device is sent to the user device, so that the user device can control its own charging power according to the maximum allowable charging power of the charging device.
[0046] In practice, the maximum allowable charging power of the charging device can be sent to the power-consuming device in the form of a duty cycle, and the power-consuming device can limit its own charging power based on the duty cycle.
[0047] In this embodiment of the invention, in order to enable the multiphase charging system to prioritize the consumption of local surplus power, before adopting the charging power adjustment method provided in this embodiment of the invention, that is, before step 401, it can be determined whether the multiphase power generation system is in surplus charging mode. Surplus charging mode refers to the mode of using the surplus power of the multiphase power generation system as the energy source of the charging equipment. The surplus power indicates that the multiphase charging system still has a power surplus after meeting the local load demand. When the multiphase power generation system is in surplus charging mode, steps 401-403 are executed.
[0048] In the surplus charging mode, the fixed value Q can be set to 0, which means that the system does not allow buying electricity from the AC grid or selling electricity to the AC grid. It only uses the power surplus of the system as the energy source for the charging equipment. The preset grid connection point power threshold of each phase can also be set to 0 (or approximately equal to 0). The following three specific examples illustrate the implementation process of the above-mentioned charging power adjustment method provided in the embodiments of the present invention in surplus charging mode.
[0049] Example 1: Assume the multiphase power generation system is a two-phase photovoltaic-storage-charging system, with a total photovoltaic power generation P. pvTotal =4kW. Phase A load power P Aload =2kW, B-phase load power P Bload =0kW, therefore, the surplus power P pvSurplus =P pvTotal - P Aload -P Bload =2kW, two-phase charging equipment is connected to the system, and the photovoltaic surplus charging mode begins. Among them, P A_REF and P B_REF All are set to 0, P A_PCC =0kW,P B_PCC =-2kW, calculated P AVERAGE_PCC =-1kW.
[0050] The result obtained after adjusting the charging power using the above method is: P A_PCC =1kW, P B_PCC =-1kW, P CHARGE_MAX =2kW.
[0051] Example 2: Assume the multiphase power generation system is a three-phase photovoltaic-storage-charging system. The total photovoltaic power generation P... pvTotal =9kW, Phase A load power P Aload =4kW, B-phase load power P Bload =1kW, C-phase load power P Cload =0kW, therefore, the surplus power P pvSurplus =P pvTotal - P Aload -P Bload -P Cload =4kW, a single-phase charging device is connected to phase A of the system, and the photovoltaic surplus charging mode is started. Among them, P A_REF P B_REF and P C_REF All are set to 0, P A_PCC =1kW, P B_PCC =-2kW, P C_PCC =-3kW, calculated P AVERAGE_PCC =-1.33kW.
[0052] The result obtained after adjusting the charging power using the above method is: P A_PCC =5kW, P B_PCC =-2kW, P C_PCC =-3kW, P CHARGE_MAX =4kW.
[0053] Example 3: Assume the multiphase power generation system is a three-phase photovoltaic-storage-charging system. The total photovoltaic power generation P...pvTotal =12kW, Phase A load power P Aload =4kW, B-phase load power P Bload =2kW, C-phase load power P Cload =0kW, therefore, the surplus power P pvSurplus =P pvTotal - P Aload -P Bload -P Cload =6kW, three-phase charging equipment is connected to the system, and the photovoltaic surplus charging mode begins. Among them, P A_REF P B_REF and P C_REF All are set to 0, P A_PCC =0kW,P B_PCC =-2kW, P C_PCC =-4kW, calculated P AVERAGE_PCC =-2kW.
[0054] The result obtained after adjusting the charging power using the above method is: P A_PCC =2kW, P B_PCC =0kW,P C_PCC =-2kW, P CHARGE_MAX =6kW.
[0055] It should be noted that the surplus charging mode is an operating mode with the primary goal of absorbing local surplus electricity. Under this mode, the system can also flexibly realize various operating states, such as charging without interacting with the grid, purchasing electricity from the grid to supplement charging, or feeding electricity back to the grid and selling electricity, depending on the surplus situation and operating strategy.
[0056] In summary, the charging power adjustment method provided in this embodiment of the invention utilizes the average grid-connected power of the multiphase power generation system, combined with the preset grid-connected power threshold of each phase, to adjust the maximum allowable charging power of each phase in real time. This allows for real-time adjustment of the maximum allowable charging power of the charging equipment based on the load operating status of each phase. This solves the problem of limited charging power for electrical equipment and the inability to fully utilize the remaining energy of the multiphase power generation system caused by the unbalanced load power connected to each phase and the randomness and dynamic changes in the load operating status. Furthermore, in this embodiment of the invention, the power requirements for the load installed on each phase are relatively low during the system installation phase, thus reducing the technical requirements for installers and lowering installation costs and difficulty.
[0057] This invention also provides a charging device, as described in the following embodiments. Since the principle by which this charging device solves the problem is similar to the above-described method for adjusting charging power, the implementation of this charging device can refer to the implementation of the method for adjusting charging power; repeated details will not be elaborated further.
[0058] The charging equipment includes: The average power determination module is used to obtain the grid connection point power of each phase of the multiphase power generation system and obtain the average grid connection point power. The first power regulation module is used to determine the maximum allowable charging power of each phase based on the average grid connection point power and the preset grid connection point power threshold of each phase. The second power determination module is used to adjust the maximum allowable charging power of the charging device according to the maximum allowable charging power of each phase.
[0059] In one embodiment, the first power regulation module can be specifically used for: The average grid connection point power is compared with the preset grid connection point power threshold for each phase; If the average grid connection point power is less than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be increased. If the average grid connection point power is greater than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be reduced. If the average grid connection point power is equal to the preset grid connection point power threshold of the phase, then the maximum allowable charging power of the phase is obtained.
[0060] In one embodiment, the second power regulation module can be specifically used for: The maximum allowable charging power of the charging equipment is adjusted based on the minimum value among the maximum allowable charging power of each phase.
[0061] In one embodiment, a transmitting module may be further included, configured to, after the second power regulation module adjusts the maximum allowable charging power of the charging device according to the maximum allowable charging power of each phase: The maximum allowable charging power of the charging device is sent to the user device, so that the user device can control its own charging power according to the maximum allowable charging power of the charging device.
[0062] In one embodiment, the sum of the preset grid connection point power thresholds for each phase is a fixed value.
[0063] In one embodiment, a mode determination module may be further included, used before the average power determination module obtains the grid connection point power of each phase of the multiphase power generation system and obtains the average grid connection point power: Determine whether the multiphase power generation system is in surplus charging mode, wherein surplus charging mode refers to the mode of using the surplus power of the multiphase power generation system as the energy source of the charging equipment; The average power determination module can be specifically used for: When the multiphase power generation system is in surplus charging mode, the grid connection point power of each phase of the multiphase power generation system is obtained to obtain the average grid connection point power.
[0064] In this embodiment of the invention, the average grid-connected power is obtained by acquiring the grid-connected power of each phase of the multiphase power generation system; based on the average grid-connected power and the preset grid-connected power thresholds for each phase, the maximum allowable charging power of each phase is determined; and the maximum allowable charging power of the charging equipment is adjusted according to the maximum allowable charging power of each phase. Thus, by utilizing the average grid-connected power of the multiphase power generation system and combining it with the preset grid-connected power thresholds for each phase, the maximum allowable charging power of each phase can be adjusted in real time. This allows for real-time adjustment of the maximum allowable charging power of the charging equipment based on the load operating status of each phase, thereby solving the problem that the charging power of the charging equipment is limited due to the unbalanced load power connected to each phase and the randomness and dynamic changes in the load operating status, and the inability to fully utilize the remaining energy of the multiphase power generation system.
[0065] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0066] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A method for adjusting charging power, characterized in that, Applied to a multiphase power generation system, the multiphase power generation system including a charging device, the method includes: Obtain the grid connection point power of each phase of the multiphase power generation system to obtain the average grid connection point power; Based on the average grid connection point power and the preset grid connection point power threshold for each phase, the maximum allowable charging power for each phase is determined. Adjust the maximum allowable charging power of the charging equipment according to the maximum allowable charging power of each phase.
2. The method as described in claim 1, characterized in that, Based on the average grid connection point power and the preset grid connection point power threshold for each phase, the maximum allowable charging power for each phase is determined, including: The average grid connection point power is compared with the preset grid connection point power threshold for each phase; If the average grid connection point power is less than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be increased. If the average grid connection point power is greater than the preset grid connection point power threshold for that phase, then the maximum allowable charging power for that phase will be reduced. If the average grid connection point power is equal to the preset grid connection point power threshold of the phase, then the maximum allowable charging power of the phase is obtained.
3. The method as described in claim 1, characterized in that, Adjust the maximum allowable charging power of the charging equipment according to the maximum allowable charging power of each phase, including: The maximum allowable charging power of the charging equipment is adjusted based on the minimum value among the maximum allowable charging power of each phase.
4. The method as described in claim 1, characterized in that, After adjusting the maximum allowable charging power of the charging equipment based on the maximum allowable charging power of each phase, the following steps are also included: The maximum allowable charging power of the charging device is sent to the user device, so that the user device can control its own charging power according to the maximum allowable charging power of the charging device.
5. The method as described in claim 1, characterized in that, The sum of the preset grid connection point power thresholds for each phase is a fixed value.
6. The method according to any one of claims 1-5, characterized in that, Before obtaining the grid connection point power of each phase of the multiphase power generation system and the average grid connection point power, the following steps are also included: Determine whether the multiphase power generation system is in surplus charging mode, wherein surplus charging mode refers to the mode of using the surplus power of the multiphase power generation system as the energy source of the charging equipment; To obtain the grid connection point power of each phase of a multiphase power generation system and thus the average grid connection point power, the following steps are taken: When the multiphase power generation system is in surplus charging mode, the grid connection point power of each phase of the multiphase power generation system is obtained to obtain the average grid connection point power.
7. A multiphase power generation system, characterized in that, The multiphase power generation system includes a multiphase AC bus, charging equipment, power generation equipment, inverter equipment, and control equipment; The power generation equipment is connected to the input side of the inverter equipment, and the output side of the inverter equipment is connected to the AC power grid through a multi-phase AC bus. The input side of the charging device is connected to at least one phase of the multiphase AC bus, and the output side of the charging device is connected to the electrical equipment. The control device or the charging device is used to implement the charging power adjustment method as described in any one of claims 1-6.
8. The multiphase power generation system as described in claim 7, characterized in that, The multiphase power generation system also includes energy storage equipment; The energy storage device is connected to the inverter device.
9. The multiphase power generation system as described in claim 7, characterized in that, The multiphase power generation system also includes multiple power acquisition devices, with one end of each power acquisition device connected to a phase AC bus and the other end connected to the AC power grid.
10. A charging device, characterized in that, The charging device, applied to a multiphase power generation system, includes: The average power determination module is used to obtain the grid connection point power of each phase of the multiphase power generation system and obtain the average grid connection point power. The first power regulation module is used to determine the maximum allowable charging power of each phase based on the average grid connection point power and the preset grid connection point power threshold of each phase. The second power determination module is used to adjust the maximum allowable charging power of the charging device according to the maximum allowable charging power of each phase.