A charging pile cluster power sharing control method, system and device

Abstract

The application provides a charging pile cluster power sharing control method, system and device, which comprises the following steps: calculating the residual power of the charging pile cluster at the current time according to the total power upper limit of the charging pile cluster at the current time, the total number of charging piles possessed by the charging pile cluster at the current time and the actual output power of each charging pile; calculating the weight of each charging pile in distributing the residual power according to the performance state of each charging pile; and obtaining the power output upper limit of each charging pile at the next time according to the residual power at the current time, the weight of each charging pile and the actual output power. The application can automatically adjust the power output upper limit of each charging pile in real time, thereby improving the equipment utilization rate and load utilization rate of the charging station.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power management of charging pile cluster, and particularly relates to a charging pile cluster power sharing control method, system and device. BACKGROUND

[0002] In the fast charging process, the charging power will change greatly with the change of the battery SOC. Fine control of the real-time available power of each charging pile in the same station can greatly save the total power distribution capacity.

[0003] The rated power load of the area where the charging station is located is fixed. In principle, the resident power load should be prioritized, and the remaining available capacity should be allocated to the charging station. During the resident power peak period, the available load power of the charging station is often less than the sum of the rated powers of all charging piles. At this time, it will lead to a decrease in the number of available charging piles and a decrease in the equipment utilization rate of the charging station, thereby affecting the operation efficiency of the charging station.

[0004] Based on the above status, the available load power of the charging station needs to be shared among multiple charging piles, and the available load power will change in real time with time or surrounding user power consumption. Therefore, the power sharing control method for multiple charging piles is particularly important.

[0005] At present, the industry has proposed various schemes for power sharing control in this application scenario. The main feature of the power sharing scheme of the prior art is that the power is allocated in proportion based on the rated power of each charging pile (i.e. the maximum charging power of the charging pile, which is only limited by the hardware of the charging pile, excluding the performance degradation of the hardware, and can be regarded as a fixed value), so as to meet the dynamically changing available load power of the charging station. The power sharing allocation timing is when a charging pile joins or exits, and the power is redistributed. Or, a fixed rated power is allocated to a part of the charging piles first, and if there is remaining power, it is allocated to another part of the charging piles.

[0006] In summary, the power sharing control method of the prior art is basically based on the rated power of each charging pile to allocate the charging power, ignoring the real-time changes in the usage state of each charging pile and the power demand of the charging equipment (such as new energy vehicles) connected to each charging pile.

[0007] Therefore, there is a greater need for a power sharing control method that can dynamically allocate power to each charging pile according to the real-time changes in the available load power of the charging station and the real-time changes in the actual demand power of each charging pile. SUMMARY

[0008] In view of the deficiencies of the prior art, the present application provides a charging pile cluster power sharing control method, comprising:

[0009] Step 1, according to the total power upper limit of the charging pile cluster at the current time, and the total number of charging piles and the actual output power of each charging pile of the charging pile cluster at the current time, calculate the remaining power of the charging pile cluster at the current time;

[0010] Step 2, according to the performance state of each charging pile, calculate the weight of each charging pile to distribute the remaining power; according to the remaining power at the current time, the weight and the actual output power of each charging pile, obtain the power output upper limit allocated to each charging pile at the next time.

[0011] In an embodiment of the present application, step 2 includes updating the total power upper limit, the total number of charging piles and the actual output power, and cyclically executing steps 1 to 2.

[0012] In an embodiment of the present application, step 1 includes calculating the remaining power △P(k) at the current time according to the following formula:

[0013]

[0014] In the formula, P Total (k) is the total power upper limit at the kth time, P Real_i (k) is the actual output power of the i th charging pile at the k th time, and N is the total number of charging piles at the k th time.

[0015] In an embodiment of the present application,

[0016] The performance state in step 2 is the rated power of the charging pile;

[0017] And step 2 includes:

[0018] The power output upper limit allocated to each charging pile at the k+1 th time at the initial time k=0 is obtained according to the following formula:

[0019]

[0020] The power output upper limit allocated to each charging pile at the k+1 th time when k>0 is obtained according to the following formula:

[0021]

[0022] In the formula, P A_i (k+1) is the power output upper limit allocated to the i th charging pile at the k+1 th time, P Rated_i (k) is the rated power of the i th charging pile.

[0023] In an embodiment of the present application, the performance state in step 2 is the actual output power of the charging pile at the current time;

[0024] And step 2 includes:

[0025] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula:

[0026]

[0027] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula when k>0:

[0028]

[0029] P(k+1) is the upper limit of the power output allocated to the i th charging pile at the k+1 moment, P A_i (k+1) is the upper limit of the power output allocated to the i th charging pile at the k+1 moment, P Rated_i (k) is the rated power of the i th charging pile.

[0030] In an embodiment of the present application,

[0031] The performance state in step 2 is the change value of the actual output power of the charging pile at the current moment;

[0032] And step 2 includes:

[0033] The change value ΔP Real_i (k) of the actual output power of each charging pile at the k moment is obtained according to the following formula:

[0034] ΔP Real_i (k) = P Real_i (k) - P Real_i (k-1)

[0035] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula when k=0:

[0036]

[0037] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula when k>0:

[0038]

[0039] P(k+1) is the upper limit of the power output allocated to the i th charging pile at the k+1 moment, P A_i (k+1) is the upper limit of the power output allocated to the i th charging pile at the k+1 moment, P Rated_i (k) is the rated power of the i th charging pile, and when is 0, the remaining power ΔP(k) is equally divided according to the total number of charging piles.

[0040] In an embodiment of the present application, the total power upper limit is less than the sum of the rated powers of all charging piles, and the upper limit of the power output allocated to each charging pile is less than or equal to the rated power of the corresponding charging pile.

[0041] The application further provides a charging pile cluster power sharing control device, comprising:

[0042] Module 1, configured to calculate the residual power of the charging pile cluster at the current time according to the total power upper limit of the charging pile cluster at the current time, the total number of charging piles and the actual output power of each charging pile of the charging pile cluster at the current time;

[0043] Module 2, configured to calculate the weight of each charging pile in distributing the residual power according to the performance state of each charging pile, and obtain the power output upper limit of each charging pile at the next time according to the residual power at the current time, the weight and the actual output power of each charging pile.

[0044] In an embodiment of the application, module 2 is further configured to update one or more of the total power upper limit, the total number of charging piles and the actual output power; and the charging pile cluster power sharing control device cyclically calls module 1 to module 2.

[0045] In an embodiment of the application, module 1 is configured to calculate the residual power △P(k) at the current time according to the following formula:

[0046]

[0047] In the formula, P Total (k) is the total power upper limit at the kth time, P Real_i (k) is the actual output power of the ith charging pile at the kth time, and N is the total number of charging piles at the kth time.

[0048] In an embodiment of the application,

[0049] The performance state is the rated power of each charging pile;

[0050] And module 2 is specifically configured to:

[0051] Obtain the power output upper limit of each charging pile at the k+1th time at the initial time k=0 according to the following formula:

[0052]

[0053] Obtain the power output upper limit of each charging pile at the k+1th time when k>0 according to the following formula:

[0054]

[0055] In the formula, P A_i (k+1) is the power output upper limit of the ith charging pile at the k+1th time, P Rated_i (k) is the rated power of the ith charging pile.

[0056] In an embodiment of the present application, the performance state is the actual output power of each charging pile at the current time;

[0057] And the module 2 is specifically used for:

[0058] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula:

[0059]

[0060] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula when k>0:

[0061]

[0062] In the formula, P A_i (k+1) is the upper limit of the power output allocated to the i-th charging pile at the k+1 moment, P Rated_i (k) is the rated power of the i-th charging pile.

[0063] In an embodiment of the present application, the performance state is the actual output power of each charging pile at the current time;

[0064] And the module 2 is specifically used for:

[0065] The change value ΔP Real_i (k) of the actual output power of each charging pile at the k moment is obtained according to the following formula:

[0066] ΔP Real_i (k) = P Real_i (k) - P Real_i (k-1)

[0067] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula:

[0068]

[0069] The upper limit of the power output allocated to each charging pile at the k+1 moment is obtained according to the following formula when k>0:

[0070]

[0071] In the formula, P A_i (k+1) is the upper limit of the power output allocated to the i-th charging pile at the k+1 moment, P Rated_i (k) is the rated power of the i-th charging pile, and when is 0, the remaining power ΔP(k) is equally divided according to the total number of charging piles.

[0072] In one embodiment of the present invention, the total power limit is less than the sum of the rated power of all charging piles, and the power output limit allocated to each charging pile is less than or equal to the rated power of the corresponding charging pile.

[0073] This invention also provides a charging pile cluster power sharing control system, comprising: a charging station monitoring and management system, a charging pile cluster controller connected to the charging station monitoring and management system, and a charging pile cluster, wherein the charging pile cluster includes multiple charging piles, and the charging pile cluster controller is connected to the multiple charging piles, wherein...

[0074] The charging station monitoring and management system is used to obtain the current total power limit of the charging pile cluster.

[0075] The charging pile cluster controller is used to calculate the remaining power of the charging pile cluster at the current moment based on the total power limit at the current moment, the total number of charging piles in the charging pile cluster, and the actual output power of each charging pile; and to calculate the weight of the remaining power allocated to each charging pile based on the performance status of each charging pile; and to obtain the power output limit allocated to each charging pile at the next moment based on the remaining power at the current moment, the weight of each charging pile, and the actual output power.

[0076] In one embodiment of the present invention, the charging pile cluster controller is used to calculate the remaining power ΔP(k) at the current moment according to the following formula:

[0077]

[0078] In the formula P Total (k) represents the upper limit of the total power at time k, P Real_i (k) represents the actual output power of the i-th charging pile at time k, and N represents the total number of charging piles at time k.

[0079] In one embodiment of the present invention,

[0080] The performance status is the rated power of the charging pile;

[0081] Furthermore, the charging pile cluster controller is used for:

[0082] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0083]

[0084] The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0085]

[0086] In the formula P A_i(k+1) represents the upper limit of power output allocated to the i-th charging pile at time k+1, P Rated_i (k) represents the rated power of the i-th charging pile.

[0087] In one embodiment of the present invention,

[0088] The performance status refers to the actual output power of each charging station at the current moment;

[0089] Furthermore, the charging pile cluster controller is used for:

[0090] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0091]

[0092] The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0093]

[0094] In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at time k+1, P Rated_i (k) represents the rated power of the i-th charging pile.

[0095] In one embodiment of the present invention, the performance status is the change in the actual output power of each charging pile at the current moment;

[0096] Furthermore, the charging pile cluster controller is used for:

[0097] The change in actual output power ΔP of each charging pile at time k is obtained according to the following formula. Real_i (k):

[0098] ΔP Real_i (k)=P Real_i (k)-P Real_i (k-1)

[0099] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0100]

[0101] The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0102]

[0103] In the formula P A_i(k+1) represents the upper limit of power output allocated to the i-th charging pile at time k+1, P Rated_i (k) represents the rated power of the i-th charging pile, and when When the value is 0, the remaining power ΔP(k) is divided equally according to the total number of charging piles.

[0104] In one embodiment of the present invention, the charging station monitoring and management system is also used to update the total power limit once at any given time.

[0105] As can be seen from the above solutions, the advantages of the present invention are:

[0106] Based on the shared total power limit set by the charging station monitoring and management system, the power output limit allocated to each charging pile is automatically adjusted in real time by the charging pile cluster controller, so as to avoid some charging piles being shut down during peak electricity consumption periods, thereby improving the equipment utilization rate and load utilization rate of the charging station. Attached Figure Description

[0107] Figure 1 This is a block diagram of a charging pile cluster power sharing control system according to an embodiment of the present invention;

[0108] Figure 2 This is a flowchart of a charging pile cluster power sharing control method according to an embodiment of the present invention;

[0109] Figure 3 This is a flowchart of a method for dynamically adjusting the power of each charging pile in a charging station according to an embodiment of the present invention. Detailed Implementation

[0110] To make the above-mentioned features and effects of the present invention clearer and easier to understand, specific embodiments and parameters are described below, along with detailed descriptions in conjunction with the accompanying drawings. It should be noted that, for the purpose of visually demonstrating the process details, the following description uses AC charging as an example; however, the application scenarios of the present invention are not limited to AC and can also be used for DC charging.

[0111] The parameters involved in this invention include:

[0112] The maximum total power output of the charging station at time k: P Total (k)

[0113] The total number of charging piles in the charging station: N

[0114] The actual output power and rated power of the i-th charging pile at time k: P Real_i (k), P Rated_i (k)

[0115] The maximum power output allocated to the i-th charging pile at time k+1: P A_i (k+1)

[0116] The total power limit of the charging station is less than the sum of the rated power of all charging piles:

[0117] At time k, the actual output power of the charging pile meets the condition: P Real_i (k)≤P A_i (k)

[0118] In this embodiment of the invention, the aforementioned total power limit P Total (k) Actual output power P Real_i (k) and rated power P Rated_i (k) The allocated upper limit of power output P A_i (k) In a preferred embodiment, all are AC power.

[0119] This invention proposes a power sharing control method and system for charging pile clusters, the system block diagram of which is shown below. Figure 1 As shown, the system communication network scheme can adopt Ethernet, serial port, WiFi, Bluetooth, Zigbee, and wireless communication modules. The charging pile cluster power sharing control system 10 of the present invention includes: a charging station monitoring and management system 11, a charging pile cluster controller 12 connected to the charging station monitoring and management system, and a charging pile cluster, which includes multiple charging piles, namely charging pile 131 (charging pile 1), charging pile 132 (charging pile 2), charging pile 133 (charging pile 3), etc. The charging pile cluster controller 12 is connected to the multiple charging piles. The charging station monitoring and management system 11 is used to obtain the total power limit P of the charging pile cluster at the current time (time k). Total (k), and transmit the total power limit P through any of the above communication schemes. Total (k) The data is transmitted to the charging pile cluster controller 12. The charging pile cluster controller 12 is used to determine the current total power limit P. Total (k) and the total number of charging piles N in the charging pile cluster and the actual output power P of each charging pile. Real_i (k), calculate the remaining power ΔP(k) of the charging pile cluster at the current moment; and calculate the weight of the remaining power allocated to each charging pile according to the performance status of each charging pile. Then, based on the remaining power ΔP(k), the weight of each charging pile, and the actual output power P, calculate the remaining power allocated to each charging pile. Real_i (k) yields the upper limit of power output (maximum available power) P allocated to each charging pile at the next time step (k+1). A_i(k+1). The upper limit of power output can be further transmitted to each charging pile or the device to be charged (such as an electric vehicle) through the above communication method. The electric vehicle draws electrical energy from the corresponding charging pile according to its actual power demand. However, the electrical energy drawn by the electric vehicle (i.e. the actual output power of the charging pile) cannot exceed the upper limit of power output of the charging pile at this moment calculated by the charging pile cluster controller 12.

[0120] It is understandable that the power demand of electric vehicles changes in real time, for example, with changes in the battery's state of charge (SOC). Therefore, the actual output power of charging stations may also change in real time.

[0121] The charging station monitoring and management system 11 is also used to detect and update the total power limit and / or the actual output power of each charging pile at each time. In some embodiments, a power detection device may also be set up to detect the actual output power of each charging pile in real time and transmit the detected actual output power of each charging pile to the charging pile cluster controller. In this embodiment, the charging pile cluster controller 12 is used to calculate the power output limit allocated to each charging pile at the next time based on the updated total power limit, the total number of charging piles, and the actual output power of each charging pile at each time, so as to limit the maximum output power of each charging pile, and continuously repeat the above process to complete the dynamic power allocation of the charging station.

[0122] In one embodiment, the charging pile cluster controller 12 calculates the remaining power ΔP(k) at the current moment according to the following formula:

[0123]

[0124] In the formula P Total (k) represents the upper limit of the total power at time k, P Real_i (k) represents the actual output power of the i-th charging pile at time k, and N represents the total number of charging piles at time k.

[0125] In one embodiment, the performance status of each charging pile is its rated power P. Rated_i (k);

[0126] Furthermore, the charging pile cluster controller 12 is specifically used for:

[0127] At the initial time k = 0, the actual output power of each charging pile is 0. The upper limit of power output allocated to each charging pile at time k+1 is obtained according to the following formula:

[0128]

[0129] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0130]

[0131] In the formula PA_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at time k+1, P Rated_i (k) represents the rated power of the i-th charging pile, where k is an integer greater than or equal to zero.

[0132] At the initial moment of the system, the actual output power P of each charging pile is... Real_i (0) = 0.

[0133] In another embodiment, the performance state of each charging station is the actual output power P of each charging station at the current moment. Real_i (k);

[0134] Furthermore, the charging pile cluster controller 12 is specifically used for:

[0135] At the initial time k = 0, the actual output power of each charging pile is 0. The upper limit of power output allocated to each charging pile at time k+1 is obtained according to the following formula:

[0136]

[0137] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0138]

[0139] In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at time k+1, P Rated_i (k) represents the rated power of the i-th charging pile.

[0140] In another embodiment, the performance status of each charging pile is the change in the actual output power of each charging pile at the current moment;

[0141] Furthermore, the charging pile cluster controller 12 is specifically used for:

[0142] The change in actual output power ΔP of each charging pile at time k when k≥1 is obtained by the following formula. Real_i (k):

[0143] ΔP Real_i (k)=P Real_i (k)-P Real_i (k-1)

[0144] At the initial time k = 0, the actual output power of each charging pile is 0. The upper limit of power output allocated to each charging pile at time k+1 is obtained according to the following formula:

[0145]

[0146] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0147]

[0148] In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at time k+1, and when When the value is 0, the remaining power ΔP(k) is divided equally according to the total number of charging piles N.

[0149] In the above embodiments, the total power limit P Total (k) is less than the sum of the rated power of multiple charging piles. Furthermore, the maximum power output P allocated to each charging station A_i (k) is less than or equal to the rated power P of the corresponding charging pile. Rated_i (k).

[0150] Based on the aforementioned charging pile cluster power sharing control system, this invention also proposes a charging pile cluster power sharing control device, comprising:

[0151] Module 1 is used to determine the current total power limit P of the charging pile cluster. Total (k), and the total number N of charging piles in the charging pile cluster at the current moment and the actual output power P of each charging pile. Real_i (k), calculate the remaining power △P(k) of the charging pile cluster at the current time;

[0152] Module 2 is used to calculate the weight of the remaining power allocated to each charging pile based on the performance status of each charging pile, and to determine the weight of the remaining power allocated to each charging pile based on the current remaining power ΔP(k), the weight of each charging pile, and the actual output power P. Real_i (k) yields the upper limit of power output P allocated to each charging pile at the next moment. A_i (k+1).

[0153] Module 2 is also used to update one or more of the total power limit, the total number of charging stations, and the actual output power.

[0154] It is understandable that the charging pile cluster power sharing control device cyclically calls modules 1 to 2. The frequency of cyclic calling can be set according to the actual application scenario. That is, every preset time interval, the total power limit, the total number of charging piles, and the actual output power of each charging pile are updated once. Based on the updated data, the power output limit of each charging pile at the next moment is calculated to achieve dynamic power allocation.

[0155] Module 1 is used to calculate the remaining power ΔP(k) at the current moment according to the following formula:

[0156]

[0157] In the formula P Total (k) represents the upper limit of the total power at time k, P Real_i (k) represents the actual output power of the i-th charging pile at time k, and N represents the total number of charging piles at time k.

[0158] In one embodiment, the performance status of each charging pile is the rated power of each charging pile;

[0159] Module 2 is specifically used for:

[0160] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0161]

[0162] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0163]

[0164] Since the same symbols in this article represent the same meaning, the meaning of each symbol in the formula has been explained in the preceding text and will not be repeated in the following text.

[0165] In another embodiment, the performance status of each charging pile is the actual output power of each charging pile at the current moment;

[0166] Module 2 is specifically used for:

[0167] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0168]

[0169] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0170]

[0171] In another embodiment, the performance status of each charging pile is the change in the actual output power of each charging pile at the current moment;

[0172] Module 2 is specifically used for:

[0173] The change in actual output power ΔP of each charging pile at time k when k≥1 is obtained by the following formula. Real_i (k):

[0174] ΔP Real_i (k)=P Real_i (k)-P Real_i (k-1)

[0175] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0176]

[0177] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0178]

[0179] when When the value is 0, the remaining power ΔP(k) is evenly distributed according to the total number of charging piles N. That is, when the change in the actual output power of all charging piles is zero, the following condition is met.

[0180] The total power limit is less than the sum of the rated power of all charging piles, and the power output limit allocated to each charging pile is less than or equal to the rated power of the corresponding charging pile.

[0181] The following are method embodiments corresponding to the above system and device embodiments. This embodiment can be implemented in conjunction with the above embodiments. The relevant technical details mentioned in the above embodiments are still valid in this embodiment, and will not be repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the above embodiments.

[0182] In this invention, the power sharing control method monitors the total power limit of the charging pile cluster and the actual output power of each charging pile in real time, and periodically adjusts the power output limit allocated to each charging pile, so as to dynamically adjust the charging power of each charging pile according to the charging demand during the charging process.

[0183] The power sharing control method used in this invention is as follows: Figure 2 As shown, it includes:

[0184] Step 1: Calculate the remaining power of the charging pile cluster at the current moment based on the current total power limit of the charging pile cluster, the current total number of charging piles in the charging pile cluster, and the actual output power of each charging pile.

[0185] Specifically, it is necessary to obtain the total power limit P allocated to the charging pile cluster in real time. Total (k), and obtain the actual output power P of each charging pile at time k. Real_i (k). Because the total power limit may change at different times, it needs to be obtained once in each processing cycle; and the actual output power of each charging pile will also change in real time during the operation of each charging pile, so it also needs to be obtained once in each processing cycle.

[0186] Step 2: Calculate the weight of the remaining power allocated to each charging pile based on the performance status of each charging pile. Based on the remaining power at the current moment, the weight of each charging pile, and the actual output power, obtain the upper limit of the power output allocated to each charging pile at the next moment.

[0187] Specifically, based on the total number N of charging piles and the maximum total power P of the charging station Total (k), combined with the actual output power P of each charging pile Real_i (k) and the rated power P of each charging pile Rated_i (k), this invention proposes the following three methods to calculate the upper limit of power output P allocated to the i-th charging pile at time k+1. A_i (k+1), in the specific implementation process, any of the following methods can be selected to calculate the upper limit of power output P allocated to the i-th charging pile at time k+1, according to actual needs. A_i (k+1):

[0188] The first method allocates the remaining power ΔP(k) according to the weight determined by the rated power of each charging pile.

[0189] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0190]

[0191] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0192]

[0193] In the above formula This refers to the weighting of ΔP(k) based on the rated power.

[0194] The second method allocates ΔP(k) based on the weight determined by the actual output power of each charging pile at the current moment.

[0195] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0196]

[0197] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0198]

[0199] In the above formula This refers to the weighted allocation of ΔP(k) based on the actual output power of each charging pile;

[0200] If P Real_i If all k are 0, then ΔP(k) is distributed equally.

[0201] If part of P Real_i If (k) is 0, then P Real_i For charging piles where (k) is not zero, ΔP(k) is first allocated according to the weight of their actual output power. If there is still excess power after allocation, for P... Real_i For charging piles where (k) is 0, the excess power is distributed evenly.

[0202] The third method allocates ΔP(k) based on the weight determined by the change in the actual output power of each charging pile at the current moment.

[0203] The change in actual output power ΔP of each charging pile at time k when k > 0 is obtained from the following formula. Real_i (k):

[0204] ΔP Real_i (k)=P Real_i (k)-P Real_i (k-1), (Min(ΔP) Real_i (k))=0)

[0205] The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0:

[0206]

[0207] The following formula yields the upper limit of power output allocated to each charging pile at time k+1 when k > 0:

[0208]

[0209] when When the value is 0, the remaining power ΔP(k) is divided equally according to the total number of charging piles N.

[0210] In the above formula This refers to the weighted allocation of ΔP(k) based on the change in the actual output power of each charging pile at the current moment;

[0211] If ΔP Real_i If all k are 0, then ΔP(k) is distributed equally.

[0212] If part of ΔP Real_i If (k) is 0, then ΔP Real_i For charging piles where (k) is not zero, ΔP(k) is first allocated according to the weight determined by the change in actual output power. If there is still excess power after allocation, then... The excess power is evenly distributed among charging stations with a capacity of 0. For example... Figure 3 As shown, the charging pile cluster controller sends the power output limit calculated in step 2 to the corresponding charging piles, ensuring that the actual output power of each charging pile in the next moment does not exceed the corresponding power output limit. Furthermore, by repeatedly executing steps 1 and 2, real-time dynamic adjustment of the power of each charging pile in the charging station is achieved. The following specific embodiments all use the first method described above to achieve dynamic power allocation in the charging station:

[0213] Implementation Case 1

[0214] Example Scenario 1 Explanation:

[0215] a) The total power limit of the charging pile cluster remains unchanged, P Total =600kW;

[0216] b) Total number of charging stations, N = 4;

[0217] c) The rated power of each charging station, P Rated_i (k) = 350kW;

[0218] d) The actual power requirements of each charging station are as follows: P Requext_0 (k) = 100kW, P Request_1 (k) = 100kW, P Request_2 (k) = 200kW, P Request_3 (k) = 0kW, and it is assumed that the actual power demand of each charging station will not change in the short term.

[0219] The dynamic power allocation process for each charging station is as follows:

[0220]

[0221] In the table above, starting from time 6, P Real_i (k) and PA_i (k+1) remains stable, meaning that the actual output power of each charging pile in two adjacent update cycles and the calculated upper limit of the power output at the next moment no longer change.

[0222] Implementation Case 2

[0223] Example Scenario 2 Explanation:

[0224] a) Based on the change in scenario one, that is, the quasi-steady state before the dynamic power adjustment in scenario two is time 6 of scenario one;

[0225] b) First, charging pile 3 starts charging, and its actual power demand is 350kW. Therefore, the actual power demand of each charging pile becomes: P Request_0 (k) = 100kW, P Request_1 (k) = 100kW, P Request_2 (k) = 200kW, P Request_3 (k) = 350kW.

[0226] The dynamic power allocation process for each charging station is as follows:

[0227]

[0228]

[0229] In the table above, starting from time 17, P Real_i (k) and P A_i (k+1) remains stable. The upper limit of the power output allocated to charging pile 3 is 197kW, which cannot meet the power demand of 350kW. Therefore, the actual output power of charging pile 3 is 197kW.

[0230] c) Then, charging station 2 stops charging, i.e., the actual power demand P of charging station 2 stops. Request_2 If (k) = 0kW, then the dynamic power allocation process for each charging station is as follows:

[0231]

[0232] In the table above, starting from time 6, P Real_i (k) and P A_i (k+1) remains stable; it can be seen that when charging pile 2 stops charging, according to the power sharing control algorithm of this application, the upper limit of power output and the actual output power allocated to charging pile 3 are both increased, ultimately meeting its power demand of 350kW.

[0233] Implementation Case 3

[0234] Example Scenario 3 Explanation:

[0235] a) Based on the change in scenario one, that is, the quasi-steady state before the dynamic power adjustment in scenario three is time 6 of scenario one;

[0236] b) Total power limit P of the charging pile cluster Total (k) When the power is changed from 600kW to 500kW, the dynamic power allocation process for each charging station is as follows:

[0237]

[0238] In the table above, starting from time 1, P Real_i (k) and P A_i (k+1) remains stable; when P Total (k) When the power is changed from 600kW to 500kW, the remaining unused power allocated to each charging pile (the difference between the upper limit of the power output allocated to the charging pile and its actual output power) changes from 50kW to 25kW.

[0239] Although the present invention has been disclosed with reference to the above embodiments, the specific embodiments are only used to explain the present invention and are not intended to limit the present invention. Any person skilled in the art can make some changes and improvements without departing from the concept and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A power sharing control method for a charging pile cluster, characterized in that, include: Step 1: Calculate the remaining power of the charging pile cluster at the current moment based on the current total power limit of the charging pile cluster, the current total number of charging piles in the charging pile cluster, and the actual output power of each charging pile. Step 2: Calculate the weight of the remaining power allocated to each charging pile based on the performance status of each charging pile; Based on the remaining power at the current moment, the weight of each charging pile, and the actual output power, the upper limit of power output allocated to each charging pile at the next moment is obtained in real time. The upper limit of power output allocated to each of the charging piles is less than or equal to the rated power of the corresponding charging pile, and the actual output power of each charging pile does not exceed the corresponding upper limit of power output. The weight is determined based on one of the following: the rated power of the charging pile, the actual output power of the charging pile at the current moment, or the change in the actual output power of the charging pile at the current moment.

2. The charging pile cluster power sharing control method as described in claim 1, characterized in that, Step 2 includes updating the total power limit, the total number of charging piles, and the actual output power, and cyclically executing steps 1 to 2.

3. The charging pile cluster power sharing control method as described in claim 1, characterized in that, Step 1 includes calculating the remaining power ΔP(k) at the current moment according to the following formula: In the formula P Total (k) represents the upper limit of the total power at time k, P Real_i (k) represents the actual output power of the i-th charging pile at time k, and N represents the total number of charging piles at time k.

4. The charging pile cluster power sharing control method as described in claim 3, characterized in that, The performance status mentioned in step 2 refers to the rated power of the charging pile. And step 2 includes: The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile.

5. The charging pile cluster power sharing control method as described in claim 3, characterized in that, The performance status mentioned in step 2 is the actual output power of the charging pile at the current moment; And step 2 includes: The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile.

6. The charging pile cluster power sharing control method as described in claim 3, characterized in that, The performance status in step 2 refers to the change in the actual output power of the charging pile at the current moment. And step 2 includes: The change in actual output power ΔP of each charging pile at time k is obtained according to the following formula. Real_i (k): ΔP Real_i (k)=P Real_i (k)-P Real_i (k-1) The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile, and when When the value is 0, the remaining power ΔP(k) is divided equally according to the total number of charging piles.

7. The charging pile cluster power sharing control method as described in claim 1, characterized in that, The total power limit is less than the sum of the rated power of all charging piles.

8. A power sharing control device for a charging pile cluster, characterized in that, include: Module 1 is used to calculate the remaining power of the charging pile cluster at the current moment based on the current total power limit of the charging pile cluster, the current total number of charging piles in the charging pile cluster and the actual output power of each charging pile. Module 2 is used to calculate the weight of the remaining power allocated to each charging pile based on the performance status of each charging pile, and to obtain the upper limit of power output allocated to each charging pile in real time at the next moment based on the remaining power at the current moment, the weight of each charging pile, and the actual output power. The upper limit of power output allocated to each of the charging piles is less than or equal to the rated power of the corresponding charging pile, and the actual output power of each charging pile does not exceed the corresponding upper limit of power output. The weight is determined based on one of the following: the rated power of the charging pile, the actual output power of the charging pile at the current moment, or the change in the actual output power of the charging pile at the current moment.

9. The charging pile cluster power sharing control device as described in claim 8, characterized in that, The module 2 is also used to update one or more of the total power limit, the total number of charging piles, and the actual output power; Furthermore, the charging pile cluster power sharing control device cyclically calls module 1 to module 2.

10. The charging pile cluster power sharing control device as described in claim 8, characterized in that, The module 1 is used to calculate the remaining power ΔP(k) at the current moment according to the following formula: In the formula P Total (k) represents the upper limit of the total power at time k, P Real_i (k) represents the actual output power of the i-th charging pile at time k, and N represents the total number of charging piles at time k.

11. The charging pile cluster power sharing control device as described in claim 10, characterized in that, The performance status refers to the rated power of each charging pile; And module 2 is specifically used for: The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile.

12. The charging pile cluster power sharing control device as described in claim 10, characterized in that, The performance status refers to the actual output power of each charging pile at the current moment; And module 2 is specifically used for: The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile.

13. The charging pile cluster power sharing control device as described in claim 10, characterized in that, The performance status refers to the change in the actual output power of each charging pile at the current moment. And module 2 is specifically used for: The change in actual output power ΔP of each charging pile at time k is obtained according to the following formula. Real_i (k): ΔP Real_i (k)=P Real_i (k)-P Real_i (k-1) The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile, and when When the value is 0, the remaining power ΔP(k) is divided equally according to the total number of charging piles.

14. The charging pile cluster power sharing control device as described in claim 8, characterized in that, The total power limit is less than the sum of the rated power of all charging piles.

15. A power sharing control system for a charging pile cluster, comprising: A charging station monitoring and management system, a charging pile cluster controller connected to the charging station monitoring and management system, and a charging pile cluster, wherein the charging pile cluster includes multiple charging piles, and the charging pile cluster controller is connected to the multiple charging piles, characterized in that... The charging station monitoring and management system is used to obtain the current total power limit of the charging pile cluster; The charging pile cluster controller is configured to calculate the remaining power of the charging pile cluster at the current moment based on the current total power limit, the total number of charging piles in the charging pile cluster, and the actual output power of each charging pile; calculate the weight for allocating the remaining power to each charging pile based on the performance status of each charging pile; and obtain the power output limit allocated to each charging pile in real time for the next moment based on the current remaining power, the weight of each charging pile, and the actual output power. The upper limit of power output allocated to each of the charging piles is less than or equal to the rated power of the corresponding charging pile, and the actual output power of each charging pile does not exceed the corresponding upper limit of power output. The weight is determined based on one of the following: the rated power of the charging pile, the actual output power of the charging pile at the current moment, or the change in the actual output power of the charging pile at the current moment.

16. The charging pile cluster power sharing control system as described in claim 15, characterized in that, The charging pile cluster controller is used to calculate the remaining power ΔP(k) at the current moment according to the following formula: In the formula P Total (k) represents the upper limit of the total power at time k, P Real_i (k) represents the actual output power of the i-th charging pile at time k, and N represents the total number of charging piles at time k.

17. The charging pile cluster power sharing control system as described in claim 16, characterized in that, The performance status refers to the rated power of the charging pile; And the charging pile cluster controller is used for: The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile.

18. The charging pile cluster power sharing control system as described in claim 16, characterized in that, The performance status refers to the actual output power of each charging pile at the current moment. And the charging pile cluster controller is used for: The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile.

19. The charging pile cluster power sharing control system as described in claim 16, characterized in that, The performance status refers to the change in the actual output power of each charging pile at the current moment. And the charging pile cluster controller is used for: The change in actual output power ΔP of each charging pile at time k is obtained according to the following formula. Real_i (k): ΔP Real_i (k)=P Real_i (k)-P Real_i (k-1) The following formula yields the upper limit of power output allocated to each charging pile at the (k+1)th time when the initial time k = 0: The following formula provides the upper limit of power output allocated to each charging pile at time k+1 when k>0: In the formula P A_i (k+1) represents the upper limit of power output allocated to the i-th charging pile at the (k+1)-th time, P Rated_i (k) represents the rated power of the i-th charging pile, and when When the value is 0, the remaining power ΔP(k) is divided equally according to the total number of charging piles.

20. The charging pile cluster power sharing control system as described in claim 15, characterized in that, The charging station monitoring and management system is also used to update the total power limit once at any given time.

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