Load balancing control method, charging pile controller and charging pile

Abstract

This application provides a load balancing control method, a charging pile controller, and a charging pile. The method includes: acquiring the load power of each phase line of a power distribution circuit; acquiring the equipment power of electrical devices connected to each phase line; determining a target phase line in the power distribution circuit and the remaining load-bearing capacity of the target phase line based on at least one of the load power and equipment power; switching the charging pile to the target phase line; and controlling the output power of the charging pile based on the remaining load-bearing capacity. The load balancing control method of this application can dynamically control the output power of the charging pile according to the real-time load of the power distribution circuit, reasonably schedule the output phase line and output power of the charging pile, achieve load balancing of each phase line of the power distribution circuit, and reduce the impact of the charging pile on the power distribution circuit.

Description

Technical Field

[0001] This application relates to the field of electric vehicle charging technology, and in particular to a load balancing control method, a charging pile controller, and a charging pile. Background Technology

[0002] Currently, electric vehicles are gaining increasing acceptance and popularity. Electric vehicles can be charged using charging stations. As the charging power of electric vehicles continues to increase, the demands on household power distribution are also rising.

[0003] However, current charging stations cannot properly schedule charging power, which causes a significant impact on household electrical circuits. Summary of the Invention

[0004] This application provides a load balancing control method, a charging pile controller, and a charging pile, which enables the charging pile to reasonably schedule charging power based on the real-time load of the household power distribution circuit, thereby reducing the impact on the household power distribution circuit.

[0005] This application provides a load balancing control method for charging piles, applied to a three-phase household power distribution circuit. The method includes:

[0006] Obtain the load power of each phase line of the power distribution circuit;

[0007] Obtain the device power of the electrical equipment connected to each of the phase lines;

[0008] The target phase line and the remaining load capacity of the target phase line are determined based on at least one of the load power and the equipment power.

[0009] The charging pile is switched to the target phase line, and the output power of the charging pile is controlled according to the remaining load-bearing power.

[0010] In some embodiments, the charging pile is a three-phase input, single-phase output charging pile, and the output of the charging pile can be switched to any phase line of the power distribution circuit.

[0011] In some embodiments, each phase of the power distribution circuit is connected to an electricity meter, and the charging pile is communicatively connected to each of the electricity meters. The charging pile obtains the load power of each phase through the electricity meter connected to each phase.

[0012] In some embodiments, each of the electrical devices is connected to a power acquisition module, which is used to acquire the power of the connected electrical devices. The charging pile and each of the power acquisition modules are communicatively connected to a server. The charging pile obtains the device power of the electrical devices connected to each phase line through the server.

[0013] In some embodiments, determining the target phase line and the remaining borne power of the target phase line in the power distribution circuit based on at least one of the load power and the device power includes:

[0014] If the load power of the phase line initially switched to by the charging pile is greater than the first preset power, and the load power of the remaining phase lines is less than the second preset power, then any one of the remaining phase lines will be determined as the target phase line.

[0015] If the load power of the phase line initially switched to by the charging pile is greater than the first preset power, and the load power of the remaining phase lines is greater than the second preset power, then the phase line with the smallest load power among the remaining phase lines will be determined as the target phase line.

[0016] The difference between the first preset power and the load power of the target phase line is determined as the remaining load-bearing power, wherein the first preset power is greater than the second preset power.

[0017] In some embodiments, the step of switching the charging pile to the target phase line and controlling the output power of the charging pile according to the remaining load-bearing power includes:

[0018] Control the output current of the charging pile to decrease to a preset current;

[0019] The charging pile is switched to the target phase line;

[0020] The output current of the charging pile is increased until the output power of the charging pile is equal to the remaining load-bearing power.

[0021] In some embodiments, determining the target phase line and the remaining borne power of the target phase line in the power distribution circuit based on at least one of the load power and the device power includes:

[0022] If the power of the electrical equipment connected to the initial phase line of the charging pile is greater than the third preset power, and the power of the electrical equipment connected to the remaining phase lines is not greater than the third preset power, then any one of the remaining phase lines will be determined as the target phase line.

[0023] If the power of the electrical equipment connected to the initial phase line of the charging pile is greater than the third preset power, and the power of the electrical equipment connected to the remaining phase lines is greater than the third preset power, then the power of the electrical equipment connected to each remaining phase line will be continuously monitored until the power of the electrical equipment connected to one of the remaining phase lines is no longer greater than the third preset power, and the phase line will be determined as the target phase line.

[0024] The difference between the fourth preset power and the load power of the target phase line is determined as the remaining load-bearing power, wherein the fourth preset power is greater than the third preset power.

[0025] In some embodiments, before obtaining the load power of each phase of the power distribution circuit, the method further includes:

[0026] Acquire multiple historical operating times of preset electrical devices connected to each of the phase lines, wherein the historical operating times include historical start time and historical end time.

[0027] Regression learning is performed on the multiple historical working times to obtain the working time model of the preset electrical equipment;

[0028] After switching the charging pile to the target phase line and controlling the output power of the charging pile according to the remaining load-bearing power, the method further includes:

[0029] Predict the start time of the preset electrical equipment based on the working time model;

[0030] When the start working time is reached, reduce the output power of the charging pile, and / or switch the charging pile to a phase line other than the phase line connected to the preset electrical equipment.

[0031] This application also provides a charging pile controller for executing the load balancing control method described in any of the above embodiments.

[0032] This application also provides a charging pile, including the above-mentioned charging pile controller.

[0033] The load balancing control method of this application embodiment obtains the load power of each phase line and the equipment power of the electrical equipment connected to each phase line, determines the target phase line and the remaining load-bearing power of the target phase line based on at least one of the load power and equipment power, switches the charging pile to the target phase line, and controls the output power of the charging pile based on the remaining load-bearing power. Therefore, it can dynamically control the output power of the charging pile according to the real-time load of the power distribution circuit, reasonably schedule the output phase line and output power of the charging pile, realize the load balancing of each phase line of the power distribution circuit, and reduce the impact of the charging pile on the power distribution circuit. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram illustrating an application scenario of the load balancing control method provided in the embodiments of this application.

[0036] Figure 2 This is a schematic diagram of the structure of a charging pile provided in an embodiment of this application.

[0037] Figure 3 This is a schematic diagram of the first type of load balancing control method provided in the embodiments of this application.

[0038] Figure 4 This is a second flowchart illustrating the load balancing control method provided in an embodiment of this application.

[0039] Figure 5 This is a schematic diagram of a third type of load balancing control method provided in an embodiment of this application.

[0040] Figure 6 This is a schematic diagram of the fourth type of load balancing control method provided in the embodiments of this application.

[0041] Figure 7 This is a fifth flowchart illustrating the load balancing control method provided in the embodiments of this application. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] This application provides a load balancing control method for charging piles, which is applied to a three-phase household power distribution circuit. It can dynamically control the output power of the charging pile according to the real-time load of the power distribution circuit, and reasonably schedule the output phase lines and output power of the charging pile to achieve load balancing of each phase line of the power distribution circuit and reduce the impact of the charging pile on the power distribution circuit.

[0044] refer to Figure 1 , Figure 1This is a schematic diagram illustrating an application scenario of the load balancing control method provided in this application embodiment. The household power distribution circuit 10 is connected to a charging pile 20 and multiple electrical devices, such as device A, device B, and device C. The charging pile 20 can be used to charge electric vehicles. Devices A, B, and C can be any electrical device in the household, such as a refrigerator, air conditioner, washing machine, television, kettle, light bulb, etc. The household power distribution circuit 10 is three-phase powered, therefore each electrical device can be connected to any phase line in the three-phase circuit. For example, the household power distribution circuit 10 may include three phase lines L1, L2, and L3, and each electrical device can be connected to any phase line among L1, L2, and L3. In some embodiments, the charging pile 20 is a three-phase input, single-phase output charging pile. The input of the charging pile 20 is simultaneously connected to the three phase lines L1, L2, and L3, and the output of the charging pile 20 can be switched to any phase line of the power distribution circuit, for example, to any phase line among L1, L2, and L3. In practical applications, the output of charging pile 20 can be switched to phase L1 by default.

[0045] It should be noted that in practical applications, there can be multiple charging piles 20 connected to the household power distribution circuit 10, meaning that multiple charging piles 20 can be installed in a single household. Multiple charging piles 20 can form a charging pile group.

[0046] refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of the charging pile 20 provided in an embodiment of this application. The charging pile 20 includes a charging pile controller 21, and a load power acquisition module 22, a device power acquisition module 23, a charging output control module 24, and a household power control module 25 connected to the charging pile controller 21.

[0047] The charging pile controller 21 is used for overall monitoring and control of the charging pile 20, realizing power scheduling of the charging pile 20. The power acquisition module 22 is used to acquire the load power of each phase line of the power distribution circuit 10, for example, the load power of each phase line in L1, L2, and L3. It should be noted that the load power of each phase line is the sum of the power of all electrical devices connected to that phase line. The device power acquisition module 23 is used to acquire the device power of electrical devices connected to each phase line, for example, the device power of electrical devices connected to each phase line in L1, L2, and L3. It should be noted that the device power acquisition module 23 can acquire the device power of the electrical devices, and which phase line in L1, L2, and L3 the electrical devices are connected to. The load power of each phase line acquired by the power acquisition module 22 is sent to the charging pile controller 21. The device power acquired by the device power acquisition module 23 is also sent to the charging pile controller 21. The charging pile controller 21 controls the charging output control module 24 and the household power control module 25 based on the received information to schedule the output power of the charging pile 20 and the electrical equipment. The charging output control module 24 is used to specifically control the output power of the charging pile 20, and the household power control module 25 is used to specifically schedule the electrical equipment.

[0048] The load balancing control method of this application embodiment can be executed by the charging pile 20 described above. The functions of each module of the charging pile 20 will be described in detail below with reference to the load balancing control method of this application embodiment.

[0049] refer to Figure 3 , Figure 3 This is a schematic flowchart of a first embodiment of the load balancing control method provided in this application. The load balancing control method includes the following steps 31-34:

[0050] 31. Obtain the load power of each phase line of the power distribution circuit.

[0051] The charging pile 20 can obtain the load power of each phase line of the power distribution circuit 10, such as the load power of each phase line in L1, L2, and L3. The load power of each phase line can be obtained by the power acquisition module 22.

[0052] In some embodiments, each phase of the power distribution circuit 10 may be connected to a meter, and the meter for each phase can obtain the load power of that phase, that is, the sum of the power of all electrical devices connected to that phase. The meter has a communication module, such as a Bluetooth or Wi-Fi wireless communication module. The charging pile 20 also has a communication module, such as a Bluetooth or Wi-Fi wireless communication module, and is communicatively connected to the meter for each phase. The charging pile 20 can obtain the load power of each phase through the meter connected to each phase; for example, it can obtain the load power of phase L1 through the meter connected to phase L1, the load power of phase L2 through the meter connected to phase L2, and the load power of phase L3 through the meter connected to phase L3.

[0053] For example, in practical applications, the electricity meter can obtain the load power of the connected phase line in real time. The electricity meter can report the real-time load power to the charging pile 20 at a certain frequency. Alternatively, the charging pile 20 can send a load power acquisition request to the electricity meter at a certain frequency, and the electricity meter can return the real-time load power to the charging pile 20 based on the received load power acquisition request.

[0054] In practical applications, after the charging pile 20 obtains the load power of each phase line of the power distribution circuit 10, it can generate a load power table. The load power table includes the load power of phase line L1, phase line L2, and phase line L3. The charging pile 20 can update the load power table each time it receives new load power. Therefore, the load power table can reflect the real-time load status of each phase line of the power distribution circuit 10.

[0055] 32. Obtain the device power of the electrical equipment connected to each phase line.

[0056] The charging pile 20 can obtain the device power of the electrical equipment connected to each phase line of the power distribution circuit 10, for example, the device power of the electrical equipment connected to each phase line of L1, L2, and L3. The device power acquisition module 23 can be used to obtain the device power of the electrical equipment connected to each phase line. It should be noted that each phase line can be connected to one or more electrical devices, or it can be zero (i.e., none).

[0057] In some embodiments, each electrical device is connected to a power acquisition module, which is used to acquire the power of the connected electrical device. In practical applications, the power acquisition module can be a module built into the electrical device or an externally installed module. The power acquisition module has communication functions, such as Bluetooth, Wi-Fi, or other wireless communication capabilities. The charging pile 20 and each power acquisition module are communicatively connected to a server, for example, wirelessly connected to a server, which can be a home server. Therefore, the charging pile 20 can communicate with the power acquisition module of each electrical device through the server to obtain the device power of the electrical device connected to each phase line.

[0058] In practical applications, after the charging pile 20 obtains the device power of each phase line connected to the electrical equipment in the power distribution circuit 10, it can generate a device power table. The device power table contains the attributes of the phase line to which the electrical equipment is connected, such as whether it is connected to phase line L1, L2, or L3, as well as the real-time power of the electrical equipment. The charging pile 20 can update the device power table each time it receives new device power.

[0059] 33. Determine the target phase line and the remaining load capacity of the target phase line in the power distribution circuit based on at least one of the load power and equipment power.

[0060] The charging pile 20 can determine the target phase line and its remaining capacity based on at least one of the load power and equipment power in the power distribution circuit 10. The target phase line is one of the three phase lines L1, L2, and L3. The remaining capacity of the target phase line is the amount of power it can still carry without exceeding its maximum power capacity. It is understood that each phase line has a maximum power capacity; if the actual power exceeds this capacity, a hazard or accident may occur. In practical applications, the maximum power capacity of each phase line can be the same. For example, in one example, the maximum power capacity of each of L1, L2, and L3 could be 12kW.

[0061] 34. Switch the charging pile to the target phase line and control the output power of the charging pile according to the remaining load-bearing power.

[0062] After determining the target phase line and the remaining power that the target phase line can carry, the charging pile 20 is switched to the target phase line, that is, the output of the charging pile 20 is switched to the target phase line, and the output power of the charging pile is controlled according to the remaining power that can carry.

[0063] For example, if the target phase line is determined to be phase line L2, and the remaining power carrying capacity of phase line L2 is 5kW, then the output of charging pile 20 can be switched to phase line L2, and the output power of charging pile 20 can be controlled according to the remaining power carrying capacity of 5kW. In one example, the output power of charging pile 20 can be directly set to 5kW; alternatively, the output power of charging pile 20 can be set to less than 5kW to leave a certain redundancy and ensure the safety of power distribution circuit 10.

[0064] In practical applications, the load warning value for each phase of the power distribution circuit 10 can be configured through a server (such as a home server), and the load of each phase can be monitored in real time. When the load of a certain phase exceeds the load warning value, an early warning can be issued, and the output power of the charging pile 20 can be reduced and the phase can be switched simultaneously.

[0065] The load balancing control method of this application embodiment obtains the load power of each phase line and the equipment power of the electrical equipment connected to each phase line, determines the target phase line and the remaining load-bearing power of the target phase line based on at least one of the load power and equipment power, switches the charging pile to the target phase line, and controls the output power of the charging pile based on the remaining load-bearing power. Therefore, it can dynamically control the output power of the charging pile 20 according to the real-time load of the power distribution circuit 10, and reasonably schedule the output phase line and output power of the charging pile 20 to achieve load balancing of each phase line of the power distribution circuit 10 and reduce the impact of the charging pile 20 on the power distribution circuit 10.

[0066] In some embodiments, reference Figure 4 , Figure 4 This is a second flowchart illustrating the load balancing control method provided in an embodiment of this application. Step 33: Determining the target phase line and its remaining capacity based on at least one of the load power and equipment power, includes the following steps:

[0067] 331. If the load power of the phase line initially switched to by the charging pile is greater than the first preset power, and the load power of the remaining phase lines is less than the second preset power, then any one of the remaining phase lines will be determined as the target phase line.

[0068] 332. If the load power of the phase line initially switched to by the charging pile is greater than the first preset power, and the load power of the remaining phase lines is greater than the second preset power, then the phase line with the smallest load power among the remaining phase lines shall be determined as the target phase line.

[0069] 333, the difference between the first preset power and the load power of the target phase line is determined as the remaining load-bearing power, wherein the first preset power is greater than the second preset power.

[0070] The first and second preset power values ​​are pre-set in the charging pile 20. These values ​​can be set according to actual application needs, experience, or the actual carrying capacity of the power distribution circuit 10. The first preset power is greater than the second preset power. Understandably, the first preset power should be less than the maximum power that each phase of the power distribution circuit 10 can carry. For example, in one application example, if the maximum power that each phase of the power distribution circuit 10 can carry is 12kW, the first preset power could be 10kW, and the second preset power could be 3kW. In practical applications, the maximum power that each phase of the power distribution circuit 10 can carry, the first preset power, and the second preset power can all be configured via a server (e.g., a home server).

[0071] The charging pile 20 compares the load power of the initially switched phase line (e.g., L1 phase line) with the first preset power, and compares the load power of the remaining phase lines (e.g., L2 and L3 phase lines) with the second preset power.

[0072] If the load power of the phase line initially switched to by the charging pile 20 (e.g., phase line L1) is greater than the first preset power, and the load power of the remaining phase lines (e.g., phase lines L2 and L3) is less than the second preset power, then any one of the remaining phase lines (e.g., phase lines L2 and L3) will be designated as the target phase line. For example, if the charging pile 20 is initially switched to phase line L1, the load power of phase line L1 is 11kW, the load power of phase line L2 is 1.5kW, and the load power of phase line L3 is 2kW, then the load power of phase line L1 is greater than the first preset power of 10kW, and the load power of phase lines L2 and L3 is less than the second preset power of 3kW. In this case, either phase line L2 or phase line L3 can be designated as the target phase line. Subsequently, the difference between the first preset power and the load power of the target phase line is determined as the remaining load-bearing power. For example, the difference of 8.5kW between the first preset power of 10kW and the load power of the target phase line L2 of 1.5kW is determined as the remaining load-bearing power, or the difference of 8kW between the first preset power of 10kW and the load power of the target phase line L3 of 2kW is determined as the remaining load-bearing power.

[0073] If the load power of the initial phase line (e.g., phase line L1) to which the charging pile 20 is initially switched is greater than the first preset power, and the load power of the remaining phase lines (e.g., phase lines L2 and L3) is greater than the second preset power, then the phase line with the smallest load power among the remaining phase lines (e.g., phase lines L2 and L3) is determined as the target phase line. For example, if the charging pile 20 is initially switched to phase line L1, the load power of phase line L1 is 11kW, the load power of phase line L2 is 5kW, and the load power of phase line L3 is 6kW, then the load power of phase line L1 is greater than the first preset power of 10kW, and the load power of phase lines L2 and L3 is greater than the second preset power of 3kW. In this case, phase line L2 with the smallest load power can be determined as the target phase line. Subsequently, the difference between the first preset power and the load power of the target phase line is determined as the remaining load-bearing power. For example, the difference of 5kW between the first preset power of 10kW and the load power of the target phase line L2 is determined as the remaining load-bearing power.

[0074] Therefore, the embodiments of this application can determine the target phase line and the remaining load-bearing power of the target phase line based on the real-time load power of each phase line.

[0075] In some embodiments, reference Figure 5 , Figure 5 This is a schematic diagram of a third type of load balancing control method provided in an embodiment of this application. Step 34: Switching the charging pile to the target phase line and controlling the output power of the charging pile according to the remaining load-bearing capacity includes the following steps:

[0076] 341, Control the output current of the charging pile to decrease to the preset current;

[0077] 342, switch the charging station to the target phase line;

[0078] 343, control the output current of the charging pile to increase until the output power of the charging pile is the remaining load-bearing power.

[0079] After determining the target phase line and remaining capacity, the charging pile 20, upon switching to the target phase line, first reduces its output current to a preset current. This preset current is a small current pre-set in the charging pile 20, such as 1A. Then, the charging pile 20 is switched to the target phase line, for example, phase line L2. Next, the output current of the charging pile 20 is increased, and its output power increases accordingly until the output power reaches the determined remaining capacity. This completes the phase line switching of the charging pile 20.

[0080] It is understandable that during the process of switching the charging pile 20 to the target phase line, the output current is first reduced, and then the output current is increased after switching to the target phase line. This can improve the electrical safety of the charging pile 20 during the phase line switching process and avoid accidents.

[0081] In some embodiments, reference Figure 6 , Figure 6 This is a schematic diagram of a fourth flow chart of the load balancing control method provided in this application embodiment. Step 33: Determining the target phase line and its remaining capacity based on at least one of the load power and equipment power, includes the following steps:

[0082] 334. If the power of the electrical equipment connected to the phase line initially switched to by the charging pile is greater than the third preset power, and the power of the electrical equipment connected to the remaining phase lines is not greater than the third preset power, then any one of the remaining phase lines will be determined as the target phase line.

[0083] 335. If the power of the electrical equipment connected to the phase line initially switched to by the charging pile is greater than the third preset power, and the power of the electrical equipment connected to the remaining phase lines is greater than the third preset power, then the power of the electrical equipment connected to each remaining phase line will be continuously monitored until the power of the electrical equipment connected to one of the remaining phase lines is greater than the third preset power, and that phase line will be identified as the target phase line.

[0084] 336. The difference between the fourth preset power and the load power of the target phase line is determined as the remaining load-bearing power, wherein the fourth preset power is greater than the third preset power.

[0085] The third and fourth preset power values ​​are power values ​​preset in the charging pile 20. These preset power values ​​can be set according to actual application needs, experience, or the actual carrying capacity of the power distribution circuit 10. The fourth preset power is greater than the third preset power. It is understood that the fourth preset power should be less than the maximum power that each phase of the power distribution circuit 10 can carry. The third preset power represents the power of a relatively high-power appliance for common household appliances. For example, in one application example, if the maximum power that each phase of the power distribution circuit 10 can carry is 12kW, the fourth preset power could be 10kW, and the third preset power could be 3kW. It should be noted that the fourth and third preset power values ​​are not necessarily related to the first and second preset power values ​​in the above embodiments.

[0086] The charging pile 20 first compares the power of each device connected to the initially switched phase line (e.g., phase line L1) with a third preset power to determine whether any device connected to the initially switched phase line has a power exceeding the third preset power (this can be understood as a high-power household appliance, such as an air conditioner, electric oven, or electric water heater). Then, it also compares the power of each device connected to the remaining phase lines (e.g., phase lines L2 and L3) with the third preset power to determine whether any device connected to the remaining phase lines has a power exceeding the third preset power.

[0087] If the device connected to the initial phase line (e.g., phase line L1) of the charging pile 20 has a power output greater than the third preset power (i.e., there is a high-power device), and none of the devices connected to the remaining phase lines (e.g., phase lines L2 and L3) have a power output greater than the third preset power (i.e., there is no high-power device), then any one of the remaining phase lines (e.g., phase lines L2 and L3) will be designated as the target phase line. For example, if the charging pile 20 is initially connected to phase line L1, and there is a device with a power output of 4kW on phase line L1, while the power output of the devices on phase lines L2 and L3 does not exceed the third preset power of 3kW, then either phase line L2 or L3 can be designated as the target phase line. Subsequently, the difference between the fourth preset power and the load power of the target phase line will be determined as the remaining achievable power. For example, if the fourth preset power is 10kW, the target phase line is phase line L2, and the load power of phase line L2 is 2kW, then the difference of 8kW between the fourth preset power of 10kW and the load power of phase line L2 will be determined as the remaining achievable power.

[0088] If the power of the electrical equipment connected to the initial phase line (e.g., phase line L1) of the charging pile exceeds the third preset power (i.e., there is a high-power electrical equipment), and the power of the electrical equipment connected to the remaining phase lines (e.g., phase lines L2 and L3) also exceeds the third preset power (i.e., there is also a high-power electrical equipment), then the power of the electrical equipment connected to each remaining phase line (e.g., phase lines L2 and L3) will be continuously monitored until one of the remaining phase lines (e.g., phase lines L2 and L3) is connected to an electrical equipment whose power does not exceed the third preset power (i.e., there is no high-power electrical equipment), and that phase line will be identified as the target phase line. For example, when charging pile 20 is initially switched to phase line L1, there are devices with a power of 4kW on phase line L1, devices with a power of 3.5kW on phase line L2, and devices with a power of 5kW on phase line L3. The device power of the devices connected to phase lines L2 and L3 is continuously monitored. If, after a period of time, the device power of the devices on phase line L3 does not exceed the third preset power of 3kW (meaning the previous 5kW device has been deactivated), then phase line L3 can be designated as the target phase line. Subsequently, the difference between the fourth preset power and the load power of the target phase line is determined as the remaining load-bearing power. For example, if the fourth preset power is 10kW and the load power of the target phase line L3 is 1kW, then the difference of 9kW (10kW) between the fourth preset power and the load power of phase line L3 is determined as the remaining load-bearing power.

[0089] Therefore, embodiments of this application can determine the target phase line and the remaining power that the target phase line can carry based on the power of the electrical equipment connected to each phase line.

[0090] Understandably, after determining the target phase line and the remaining load capacity of the target phase line, the charging pile 20 can first control the reduction of the output current of the charging pile 20, then switch to the target phase line, and then control the increase of the output current of the charging pile 20 until the output power of the charging pile is the remaining load capacity.

[0091] In some embodiments, the charging pile 20 may also make a comprehensive judgment based on the load power of each phase line and the equipment power of the electrical equipment connected to each phase line to determine the target phase line and the remaining load-bearing power of the target phase line.

[0092] In some embodiments, reference Figure 7 , Figure 7 This is a fifth flowchart illustrating the load balancing control method provided in this application embodiment. Before step 31: obtaining the load power of each phase line of the power distribution circuit, the method further includes the following steps:

[0093] 35. Obtain multiple historical working times of preset electrical equipment connected to each phase line. The historical working time includes the historical start time and the historical end time.

[0094] 36. Regression learning is performed on multiple historical working times to obtain a working time model for the preset electrical equipment;

[0095] Step 34: After switching the charging pile to the target phase line and controlling the output power of the charging pile according to the remaining load capacity, the following steps are also included:

[0096] 37. Predict the start time of preset electrical equipment based on the working time model;

[0097] 38. When the start time for operation is reached, reduce the output power of the charging pile, and / or switch the charging pile to a phase line other than the phase line of the preset electrical equipment connection.

[0098] The preset electrical equipment refers to one or more pre-set electrical devices. These preset devices can be set according to needs, experience, or by the user. In one example, the preset electrical equipment could be high-powered household appliances such as air conditioners, electric ovens, and electric water heaters. The charging station 20 can obtain multiple historical operating times of the preset electrical devices connected to each phase line. For example, the charging station 20 can communicate with these preset electrical devices through a server (e.g., a home server) to obtain the operating time of each preset electrical device each time it operates, thus obtaining multiple historical operating times. These historical operating times can include the historical start time and historical end time, i.e., the start and end times of each operation of the preset electrical device.

[0099] Subsequently, the charging piles underwent regression learning on multiple historical operating times to obtain a working time model for the preset electrical equipment. Understandably, regression learning can study the relationship between the operation and time of preset electrical equipment based on historical data, thus the resulting working time model can predict the future working time of the preset electrical equipment, i.e., when it will start working and when it will stop working.

[0100] Understandably, in some embodiments, regression learning can be performed on multiple historical operating times for each preset electrical device to obtain an individual operating time model for each preset electrical device. Therefore, each operating time model can predict the future operating time of a corresponding preset electrical device. In other embodiments, regression learning can be performed on all historical operating times of multiple preset electrical devices to obtain a shared operating time model for multiple preset electrical devices. This operating time model can distinguish between different preset electrical devices, and therefore, this single operating time model can predict the future operating time of multiple preset electrical devices.

[0101] After the charging pile 20 is switched to the target phase line and its output power is controlled, the start time of the preset electrical equipment can be predicted based on the working time model, that is, when the preset electrical equipment will start working. For example, if each preset electrical equipment corresponds to a working time model, the working time model corresponding to each preset electrical equipment can be called to predict the start time of that preset electrical equipment; if multiple preset electrical equipment share a working time model, the start time of each preset electrical equipment can be predicted separately using the working time model.

[0102] Subsequently, when the predicted start-up time arrives, the output power of the charging pile 20 is reduced, for example, by controlling the output power of the charging pile 20 to be reduced by half, and / or, the charging pile 20 is switched to a phase line other than the phase line connected to the preset electrical equipment. It is understood that if the phase line connected to the preset electrical equipment is different from the phase line switched to by the charging pile 20, the charging pile 20 does not need to switch phase lines; if the phase line connected to the preset electrical equipment is the same as the phase line switched to by the charging pile 20, the charging pile 20 can switch phase lines, or reduce the output power while switching phase lines. Therefore, based on the predicted start-up time, the output power of the charging pile 20 can be reduced in a timely manner when the preset electrical equipment starts working, or the charging pile 20 can be switched to another phase line, avoiding line overload due to the sudden start of the preset electrical equipment and improving the safety of the power distribution circuit 10.

[0103] This application also provides a charging pile controller, such as the charging pile controller 21 in the above embodiments. The charging pile controller is used to execute the load balancing control method of any of the above embodiments.

[0104] This application also provides a charging pile, such as the charging pile 20 in the above embodiments, which includes the charging pile controller. The charging pile can be used to implement the load balancing control method of any of the above embodiments.

[0105] This application also provides a storage medium storing a computer program, which, when executed by a processor, implements the load balancing control method of any of the above embodiments.

[0106] It should be noted that those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, which may include, but is not limited to, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0107] In the description of this application, it should be understood that terms such as “first” and “second” are used only to distinguish similar objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0108] The load balancing control method, charging pile controller, and charging pile provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and its core ideas. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A load balancing control method for charging piles, characterized in that, The method, applied to a three-phase household power distribution circuit, includes: Obtain the load power of each phase line of the power distribution circuit; Obtain the device power of the electrical equipment connected to each of the phase lines; Determining the target phase line and the remaining capacity of the target phase line in the power distribution circuit based on at least one of the load power and the equipment power includes: If the load power of the phase line initially switched to by the charging pile is greater than the first preset power, and the load power of all remaining phase lines is less than the second preset power, then any one of the remaining phase lines is determined as the target phase line; if the load power of the phase line initially switched to by the charging pile is greater than the first preset power, and the load power of all remaining phase lines is greater than the second preset power, then the phase line with the smallest load power among the remaining phase lines is determined as the target phase line; the difference between the first preset power and the load power of the target phase line is determined as the remaining load-bearing power, wherein the first preset power is greater than the second preset power; or If the power of the equipment connected to the initial phase line of the charging pile is greater than the third preset power, and the power of the equipment connected to the remaining phase lines is not greater than the third preset power, then any one of the remaining phase lines is determined as the target phase line; if the power of the equipment connected to the initial phase line of the charging pile is greater than the third preset power, and the power of the equipment connected to the remaining phase lines is greater than the third preset power, then the power of the equipment connected to each remaining phase line is continuously monitored until the power of the equipment connected to one of the remaining phase lines is not greater than the third preset power, and that phase line is determined as the target phase line; the difference between the fourth preset power and the load power of the target phase line is determined as the remaining load-bearing power, wherein the fourth preset power is greater than the third preset power; Switching the charging pile to the target phase line and controlling the output power of the charging pile according to the remaining load-bearing power includes: controlling the output current of the charging pile to decrease to a preset current; switching the charging pile to the target phase line; and controlling the output current of the charging pile to increase until the output power of the charging pile is the remaining load-bearing power.

2. The load balancing control method according to claim 1, characterized in that, The charging pile is a three-phase input, single-phase output charging pile, and the output of the charging pile can be switched to any phase line of the power distribution circuit.

3. The load balancing control method according to claim 1, characterized in that, Each phase line of the power distribution circuit is connected to an electricity meter, and the charging pile is communicatively connected to each of the electricity meters. The charging pile obtains the load power of each phase line through the electricity meter connected to each phase line.

4. The load balancing control method according to claim 1, characterized in that, Each of the electrical devices is connected to a power acquisition module, which is used to acquire the power of the connected electrical devices. The charging pile and each of the power acquisition modules are communicatively connected to a server. The charging pile obtains the device power of the electrical devices connected to each phase line through the server.

5. The load balancing control method according to any one of claims 1 to 4, characterized in that, Before obtaining the load power of each phase line of the power distribution circuit, the method further includes: Acquire multiple historical operating times of preset electrical devices connected to each of the phase lines, wherein the historical operating times include historical start time and historical end time. Regression learning is performed on the multiple historical working times to obtain the working time model of the preset electrical equipment; After switching the charging pile to the target phase line and controlling the output power of the charging pile according to the remaining load-bearing power, the method further includes: Predict the start time of the preset electrical equipment based on the working time model; When the start working time is reached, reduce the output power of the charging pile, and / or switch the charging pile to a phase line other than the phase line connected to the preset electrical equipment.

6. A charging pile controller, characterized in that, Used to perform the load balancing control method according to any one of claims 1 to 5.

7. A charging pile, characterized in that, Includes the charging pile controller as described in claim 6.

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