Energy dispatch methods, systems and devices

Abstract

This application relates to an energy dispatching method, system, and device. The method includes: determining inter-group allocation priority: determining the inter-group allocation priority of each group of energy storage units based on the remaining battery power of each group of energy storage units; inter-group power allocation: determining the group phase power allocated to each phase transmission line of each group of energy storage units based on the inter-group allocation priority and the upper limit power value of each phase transmission line of each group of energy storage units; intra-group priority determination: for each group of energy storage units, determining the intra-group allocation priority of the energy storage unit based on the remaining battery power of each energy storage device in the energy storage unit; intra-group power allocation: within each group of energy storage units, determining the initial phase power allocated to each phase transmission line of each energy storage device based on the intra-group allocation priority, the upper limit inverter power value of the inverter of each energy storage device, and the upper limit battery power value of each energy storage device. This method can improve efficiency.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy dispatching method, system and device. Background Technology

[0002] With the rapid development of the energy storage industry, intelligent scheduling of energy storage systems is becoming increasingly popular. The energy management system (EMS) of energy storage systems, with its excellent performance, fully meets users' needs in various aspects such as disaster prevention and mitigation, peak shaving and valley filling, and self-consumption.

[0003] In traditional parallel systems, each group consists of one or more standalone systems connected by wires. The central control center connects to each group's main unit wirelessly (WIFI, BLE, etc.) or wiredly (CAN, 485, etc.), and collects grid information through electricity meters. This places higher demands on the energy management system (EMS) of parallel systems. It needs to precisely adjust the system's output power under more complex operating conditions. Furthermore, the distribution of power among multiple energy storage devices operating simultaneously significantly impacts the overall system's performance and stability. Summary of the Invention

[0004] Therefore, it is necessary to provide an energy dispatching method, system, and device that can precisely adjust the output power of the system to ensure the performance and stability of the entire system, addressing the aforementioned technical problems.

[0005] In a first aspect, this application provides an energy scheduling method, comprising:

[0006] Inter-group allocation priority determination: Based on the remaining battery capacity of each group of energy storage units, the inter-group allocation priority of each group of energy storage units is determined;

[0007] Inter-group power allocation: Based on the inter-group allocation priority and the upper limit power value of each phase transmission line of the energy storage unit in each group, determine the group phase power allocated to each phase transmission line of each energy storage unit according to the target total working power of each phase.

[0008] Group priority determination: For each group of energy storage units, the group allocation priority of the energy storage unit is determined based on the remaining battery power of each energy storage device in the energy storage unit.

[0009] Intra-group power allocation: In each group of energy storage units, the initial phase power of the group phase power allocated to each phase transmission line of each energy storage device is determined according to the intra-group allocation priority, the inverter power limit of each energy storage device's inverter, and the battery power limit of each energy storage device.

[0010] The upper limit power value on each phase transmission line of each energy storage unit is the sum of the upper limit inverter power values ​​of the inverters of each energy storage device in the energy storage unit on the corresponding phase transmission line.

[0011] Secondly, this application also provides an energy dispatching system, which applies the energy dispatching method in any of the above embodiments, including multiple sets of energy storage units and a central control center that is communicatively connected to the multiple sets of energy storage units. Each set of energy storage units includes a host and at least one energy storage device that is communicatively connected to the host.

[0012] The central control center is used to obtain the remaining battery power of each group of energy storage units and to perform the process of determining the inter-group allocation priority and the inter-group power allocation of each group of energy storage units.

[0013] Each of the aforementioned hosts is used to perform the group priority determination process and the group power allocation process;

[0014] Each energy storage device is used to operate based on the initial phase power allocated to each phase of the energy storage device by the host.

[0015] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described in any of the above embodiments.

[0016] The aforementioned energy dispatching method, system, and equipment first determine the inter-group allocation priority, then perform inter-group power allocation based on the inter-group allocation priority, and subsequently determine the intra-group priority and perform intra-group power allocation based on the intra-group priority. By utilizing the grouping of energy storage devices, first performing inter-group power allocation, and then performing intra-group power allocation, the system's output power is adjusted in a hierarchical manner, which improves the accuracy of the system's output power and thus ensures the performance and stability of the entire system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an energy storage system scheduling system in one embodiment;

[0019] Figure 2 This is a flowchart illustrating an energy storage system scheduling method in one embodiment;

[0020] Figure 3 This is a flowchart illustrating the energy storage system scheduling method in yet another embodiment;

[0021] Figure 4 This is a schematic diagram in one embodiment of how the host allocates the total target power of each group to the target power of each phase.

[0022] Figure 5 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0025] For ease of understanding, we define the following uniformly: when the actual inverter power is positive, it means that energy from the single-unit system flows out through the inverter; when the actual inverter power is negative, it means that external energy charges the battery through the inverter; when the actual battery power is positive, it means that the battery is discharging; when the actual battery power is negative, it means that the battery is charging; when the grid power is positive, it means that the entire energy storage system is feeding power to the grid; when the grid power is negative, it means that energy is flowing into the grid (possibly to power the load or to charge the energy storage module).

[0026] It should also be noted that the energy scheduling method in this application can be used for both charging control and discharging control, which will be described uniformly below, and will also be explained when the scheduling scheme is used only in one case.

[0027] The energy scheduling method provided in this application embodiment can be applied to, for example, Figure 1 The energy storage system shown is a distributed energy storage system. It comprises multiple energy storage units and a central control center communicatively connected to these units. Each energy storage unit includes a main unit and at least one energy storage device communicatively connected to it. Figure 1As shown, energy storage devices P11, P12, and P13 form one group; energy storage device P21 forms another group; and energy storage devices P31 and P32 form yet another group. Figure 1 The thin solid lines shown represent intra-group communication, and the communication method is not limited. Among them, energy storage devices P11, P21, and P31 are the main units of their respective groups. The central control center connects to the main units of each group wirelessly (WIFI, BLE, etc.) or wiredly (CAN, 485, etc.). The central control center also collects grid information through electricity meters.

[0028] Among them, the combination Figure 2 As shown, to improve scheduling efficiency, this application employs a centralized control center for preliminary energy scheduling. This involves the central control center acquiring the remaining battery power of each group of energy storage units, as well as determining the inter-group allocation priority and power distribution. Within each group, the main unit performs more refined calculations. Each main unit executes the intra-group priority determination and power distribution processes to allocate the target power for each phase of each individual system. This decentralized calculation approach, after the central control center performs the main calculations, sends the preliminary results to the main units within the energy storage system for further calculations. Each energy storage device operates based on the initial phase power allocated by the main unit to each phase of the transmission line.

[0029] Specifically, the host in each group of energy storage units uploads necessary information (such as the remaining battery power of the energy storage unit) to the central control center. The central control center obtains this necessary information and collects grid information through electricity meters. Then, the central control center performs calculations to obtain the group phase power on each phase transmission line of each group of energy storage units. Based on the received group phase power on each phase transmission line of each group of energy storage units, the host in each group further calculates the initial phase power on each phase transmission line of each energy storage device and sends it to each energy storage device. After receiving the target power, each energy storage device adjusts its actual output according to the target power. In this way, the host only uploads limited processed data, and the central control center performs overall energy scheduling and balances the phase power of each group of energy storage systems in real time. After receiving the group phase power, the host of each group further calculates and processes it to allocate the initial phase power of each energy storage device on each phase transmission line. This reduces the amount of data processing and calculation at each stage, improves the calculation speed of the target power, and reduces the pressure on the overall data transmission. In addition, by grouping the energy storage devices, power allocation is first performed between groups and then within groups. This hierarchical adjustment of the system's output power improves the accuracy of the system's output power, thereby ensuring the performance and stability of the entire system.

[0030] In some optional embodiments, the above scheme can deploy a distributed EMS design scheme with less communication pressure. In this way, by performing published EMS calculations, that is, the central control center performs preliminary calculations of the group phase power on each phase transmission line of the energy storage unit, and the host of the group performs further target calculations, the target power scheduling of the complex system can be realized, improving the overall response speed of the system. In addition, the central control center is responsible for balancing the processing of each group to ensure the accuracy and reliability of the system power output.

[0031] For ease of understanding, the following provides a detailed description of the processing methods for the central control center and the group's hosts. Specifically, in an exemplary embodiment, as follows: Figure 3 As shown, a capacity scheduling method is provided, including steps 302 to 308. Wherein:

[0032] S302: Determining the inter-group allocation priority: Based on the remaining battery capacity of each group of energy storage units, determine the inter-group allocation priority of each group of energy storage units.

[0033] The inter-group allocation priority is determined based on the remaining battery capacity of each group of energy storage units. The inter-group allocation priority is not a fixed order or determined according to the remaining battery capacity SOC. This application involves a large number of energy storage units, and frequent switching should be avoided. Therefore, this application determines the inter-group allocation priority based on the remaining battery capacity of each group of energy storage units after aggregation. The inter-group allocation priority will only be adjusted when the group with the largest SOC changes.

[0034] In some optional embodiments, the inter-group allocation priority of each group of energy storage units is determined based on the remaining battery capacity of each group of energy storage units, including: determining the average remaining battery capacity of each group of energy storage units; determining an initial inter-group allocation priority according to a first target order of the average remaining battery capacity of each group of energy storage units, wherein when each energy storage unit is in a discharging state, the first target order is from largest to smallest, and when each energy storage unit is in a charging state, the first target order is from smallest to largest; if the energy storage unit corresponding to the largest average remaining battery capacity changes, determining a first difference between the largest and smallest average remaining battery capacity; if the first difference is greater than a first threshold, updating the inter-group allocation priority according to the first target order of the average remaining battery capacity of each group of energy storage units; if the first difference is less than or equal to the first threshold, maintaining the original inter-group allocation priority.

[0035] Specifically, when each energy storage unit is in a discharging state, the default allocation order is energy storage unit P1, energy storage unit P2, and energy storage unit P3. Whenever the first difference between the largest average remaining battery capacity C and the smallest average remaining battery capacity is greater than a first threshold, the inter-group allocation priority is changed, and the inter-group allocation priority is determined by the average remaining battery capacity of each group from largest to smallest. If the first difference is less than or equal to the first threshold, the original inter-group allocation priority is maintained to avoid frequent switching and ensure system stability.

[0036] Specifically, when each energy storage unit is in a charging state, the default allocation order is energy storage unit P1, energy storage unit P2, and energy storage unit P3. Whenever the first difference between the largest average remaining battery capacity C and the smallest average remaining battery capacity is greater than a first threshold, the inter-group allocation priority is changed, and the inter-group allocation priority is based on the average remaining battery capacity of each group from smallest to largest. If the first difference is less than or equal to the first threshold, the original inter-group allocation priority is maintained to avoid frequent switching and ensure system stability.

[0037] The first threshold can be 5. In other embodiments, the value of the first threshold is in the range of 3-10, and no specific limitation is made here.

[0038] In the above embodiments, the priority of inter-group allocation will only be adjusted if the first difference between the largest average remaining battery power and the smallest average remaining battery power is greater than a first threshold, which can avoid frequent switching and ensure the stability of the system.

[0039] It should be noted that each group of hosts can obtain individual machine information through internal communication channels, and then summarize and organize this individual machine information to obtain summarized information, which is then uploaded to the central control center. The summarized information only includes the necessary data required for calculation by the central control center, and does not include other irrelevant data, thereby reducing the amount of data reported to the central control center and reducing the data processing workload of the central control center.

[0040] The individual unit information may include the maximum charging limit per phase of the inverter (caused by physical factors, such as product materials and temperature factors, similar to discharge), the maximum discharge limit per phase of the inverter, the actual output power of each inverter phase, the maximum charging power of the battery, the maximum discharging power of the battery, the remaining battery capacity (i.e., SOC), and the actual battery power.

[0041] The host computer's processing of this individual unit information may include calculating the total charging limit, total discharging limit, actual inverter power, and average battery SOC for each group.

[0042] Specifically, let's take the first phase L1 of the aforementioned energy storage unit P1 as an example:

[0043] MP p1-L1 = MP p1，1-L1 +MP p1，2-L1 +MP p1，3-L1 .

[0044] INVP p1-L1 =INVP p1，1-L1 +P p1，2-L1 +P p1，3-L1 .

[0045] BatP p1,1 =(BatP p1,1 +BatP p1,2 +BatP p1,3 ) / 3.

[0046] Among them, MP pk-Lj INVP represents the upper limit power value of the k-th energy storage unit pk on the j-th phase transmission line Lj. pk,h-Lj BatP represents the upper limit of the inverter power of the h-th energy storage device in any group of energy storage units pk on the j-th phase transmission line Lj. pk,h Let f(x) be the upper limit of the battery power of the h-th energy storage device in any group of energy storage units pk.

[0047] Other groups also undergo the same processing. After processing, the summarized information is sent to the central control center, which includes the total charging limit for each phase of each group, the total discharging limit for each phase of each group, and the remaining battery capacity of each group. In other embodiments, if the central control center includes other functions, the data types uploaded by each host can be configured accordingly; no specific limitations are made here.

[0048] S304: Inter-group power allocation: Based on the inter-group allocation priority and the upper limit power value of each phase transmission line of each group of energy storage units, determine the group phase power allocated to each phase transmission line of each group of energy storage units according to the target total working power of each phase.

[0049] The upper limit power value on each phase transmission line of each energy storage unit is the sum of the upper limit inverter power values ​​of the inverters of each energy storage device in the energy storage unit on the corresponding phase transmission line.

[0050] The target total operating power per phase is determined based on grid information, which can be obtained by the central control center through electricity meters. Based on this grid information, the target total operating power per phase can be calculated. This allows for the calculation of target power adapted to current conditions. Specifically, during peak electricity price periods, the battery supplies power to the load and feeds power to the grid via the inverter. During off-peak electricity price periods, the grid supplies power to the load and charges the battery via the inverter. This allows for the separate calculation of the target total operating power per phase under both discharging and charging conditions.

[0051] In some alternative embodiments, the expected discharge and charging power of the grid are set by the user or determined based on the grid inlet circuit breaker in the actual environment. For example, if the user's grid inlet circuit breaker has a grid current of 20A and a grid voltage of 230V, then the maximum expected charging and discharging power is 4500W (which needs to be smaller than the calculated value of 4600W, and should not be operated under extreme conditions as much as possible).

[0052] In some optional embodiments, during peak electricity prices, discharge control is performed according to the scheduling method of this application, and during off-peak electricity prices, charging control is performed according to the scheduling method of this application.

[0053] After determining the target total operating power of each phase based on grid information, inter-group allocation can be performed based on the upper limit power value of each phase transmission line of each group of energy storage units and the target total operating power of each phase to determine the group phase power of each phase transmission line of each group of energy storage units. In some optional embodiments, processing can be performed phase by phase or in parallel across multiple phases. For each phase, the group phase power of each phase transmission line of each group of energy storage units is calculated by combining the target total operating power of that phase and the upper limit power value of the corresponding phase transmission line of each group of energy storage units.

[0054] S306: Group Priority Determination: For each group of energy storage units, the group allocation priority of the energy storage unit is determined based on the remaining battery power of each energy storage device in the energy storage unit.

[0055] The allocation priority within a group is determined based on the remaining battery capacity of each energy storage device in each group, and the allocation priority is not a fixed order or determined according to the remaining battery capacity (SOC). This application involves a large number of energy storage devices, and frequent switching should be avoided. Therefore, this application determines the allocation priority within a group based on the remaining battery capacity of each group of energy storage devices.

[0056] In some optional embodiments, for each group of energy storage units, the intra-group allocation priority of the energy storage units is determined based on the remaining battery capacity of each energy storage device in the energy storage unit. This includes: for each group of energy storage units, determining an initial intra-group allocation priority based on a second target order of the remaining battery capacity of each energy storage device in the energy storage unit, wherein when each energy storage unit is in a discharging state, the second target order is from largest to smallest, and when each energy storage unit is in a charging state, the second target order is from smallest to largest; if the energy storage device corresponding to the largest remaining battery capacity changes in each group of energy storage units, determining a second difference between the largest and smallest remaining battery capacity; if the second difference is greater than a second threshold, updating the intra-group allocation priority again based on the second target order of the remaining battery capacity of each energy storage device in the energy storage unit; if the second difference is less than or equal to the second threshold, maintaining the original intra-group allocation priority.

[0057] Specifically, when each energy storage unit is in a discharging state, the default allocation order is energy storage device P11, energy storage device P12, and energy storage device P13. Whenever the second difference between the remaining capacity of the largest battery and the remaining capacity of the smallest battery is greater than the second threshold, the allocation priority within the group is changed. The allocation priority within the group is determined by the remaining capacity of each energy storage device from largest to smallest. If the second difference is less than or equal to the second threshold, the original allocation priority within the group is maintained to avoid frequent switching and ensure the stability of the system.

[0058] Specifically, when each energy storage unit is in a charging state, the default allocation order is energy storage device P11, energy storage device P12, and energy storage device P13. Whenever the second difference between the remaining capacity of the largest battery and the remaining capacity of the smallest battery is greater than the second threshold, the allocation priority within the group is changed. The allocation priority within the group is determined by the remaining capacity of each energy storage device from smallest to largest. If the second difference is less than or equal to the second threshold, the original allocation priority within the group is maintained to avoid frequent switching and ensure the stability of the system.

[0059] The second threshold can be 5. In other embodiments, the value of the second threshold is in the range of 3-10, and no specific limitation is made here.

[0060] In the above embodiments, the group allocation priority will only be adjusted when the second difference between the largest remaining battery power and the smallest remaining battery power is greater than the second threshold, which can avoid frequent switching and ensure the stability of the system.

[0061] S308: Intra-group power allocation: In each group of energy storage units, the initial phase power of the group phase power is allocated to each phase transmission line of each energy storage device based on the intra-group allocation priority, the upper limit of the inverter power of each energy storage device's inverter, and the upper limit of the battery power of each energy storage device.

[0062] Combination Figure 4 As shown, Figure 4 This is a schematic diagram illustrating how, in one embodiment, the host allocates the group phase power on each phase transmission line of each group of energy storage units to the initial phase power on each phase transmission line of each energy storage device. After receiving the group phase power on each phase transmission line of each group of energy storage units, the host can perform intra-group allocation. For example, it can calculate the target power of each phase of each energy storage device within the group based on the group phase power on each phase transmission line of each group of energy storage units. Specifically, it can be processed phase by phase or in parallel across multiple phases. For each phase, the target power of each energy storage device is calculated by combining the total target power of that phase with the inverter information of each energy storage device, thereby determining the initial phase power on each phase transmission line of each energy storage device within the group.

[0063] Specifically, the initial phase power on each phase transmission line of each energy storage device must be less than or equal to the upper limit of the inverter power of each energy storage device's inverter, and the sum of the initial phase power of each phase of each energy storage device must be less than or equal to the upper limit of the battery power of each energy storage device. After determining the allocation priority within the group, the initial phase power on each phase transmission line of each energy storage unit (issued by the central control center), the upper limit of the inverter power of each energy storage device in the group (using the charging limit during charging and the discharging limit during discharging), and the upper limit of the battery power of each energy storage device in the group are used to allocate the initial phase power on each phase transmission line to each energy storage device in the group. Specifically, each allocation first considers the upper limit of the inverter power, then the upper limit of the battery power, and allocates according to the allocation priority within the group.

[0064] Each energy storage device in the subsequent group can operate according to the initial phase power of each phase transmission line of each energy storage device.

[0065] The above energy dispatching method first determines the inter-group allocation priority, then performs inter-group power allocation based on the inter-group allocation priority, and subsequently determines the intra-group priority and performs intra-group power allocation based on the intra-group priority. In this way, by grouping energy storage devices, first performing inter-group power allocation, and then performing intra-group power allocation, the allocation complexity is reduced and the processing efficiency is improved.

[0066] In some optional embodiments, the N groups of energy storage units are sequentially labeled as the first group to the Nth group of energy storage units according to the inter-group allocation priority; wherein, determining the group phase power allocated to each phase transmission line of each group of energy storage units based on the inter-group allocation priority and the upper limit power value on each phase transmission line of each group of energy storage units includes: if the target total operating power P_Lj of the j-th phase transmission line Lj is less than or equal to the upper limit power value MP of the j-th phase transmission line Lj of the first group of energy storage units. p1-Lj The group phase power P allocated to the j-th phase transmission line Lj of the first group of energy storage units is then... p1-Lj =P_Lj, and the group phase power P allocated to any energy storage unit pk in the second to Nth group of energy storage units on the j-th phase transmission line Lj. pk-Lj For: P pk-Lj =0, N≥2; if the target total operating power P_Lj of the j-th phase transmission line Lj is greater than or equal to the sum of the upper limit power values ​​of the j-th phase transmission lines Lj of N energy storage units. Then allocate any group of energy storage units P pk The group phase power P on the j-th phase transmission line Lj pk-Lj For: P pk-Lj =MP pk-Lj , N≥2; if If 1 ≤ T < N, then the group phase power P allocated to any energy storage unit pk in the first to the Tth group of energy storage units on the j-th phase transmission line Lj is... pk-Lj For: P pk-Lj =MP pk-Lj Where k∈[1,T]; and the group phase power P of the T+1th group of energy storage units on the j-th phase transmission line Lj is allocated. pT+1-Lj for: And the group phase power P allocated to any energy storage unit pk from the T+2th group to the Nth group on the j-th phase transmission line Lj. pk-Lj For:P pk-Lj =0,k∈[T+2,N]; where MP pk-Lj Let pk be the upper limit power value of the k-th energy storage unit on the j-th phase transmission line Lj.

[0067] The allocation process follows the inter-group priority, determining the group-phase power on each phase transmission line of each group of energy storage units based on the target total operating power of each phase of the power grid and the upper limit power value on each phase transmission line of the energy storage unit. For example, for each phase, the current energy storage unit is identified, and then the corresponding group-phase power is allocated to the current energy storage unit based on the target total operating power of each phase of the power grid and the upper limit power value on each phase transmission line of the energy storage unit. Then, based on the inter-group allocation priority, the next energy storage unit is determined as the current energy storage unit, and the corresponding group-phase power is allocated to the current energy storage unit based on the target total operating power of each phase of the power grid and the upper limit power value on each phase transmission line of the energy storage unit, until the allocation is completed.

[0068] Specifically, for each phase, the first group of energy storage units, determined according to the inter-group allocation priority, such as energy storage unit P1, is first allocated the corresponding group phase power, for example, when P_Lj≤MP p1-Lj In the case of P p1-Lj =P_Lj, at this time, other energy storage units do not need to participate in the allocation, so that Figure 1 For example, only the group phase power of the j-th phase of energy storage unit P1 needs to be set to P_Lj, and other energy storage units do not need to participate in the allocation.

[0069] If the sum of the upper limit power values ​​of the j-th phase transmission line Lj of the energy storage units in the first T groups, determined according to the inter-group allocation priority, is less than the target total operating power P_Lj of the j-th phase transmission line Lj, ​​and the target total operating power P_Lj of the j-th phase transmission line Lj is less than the sum of the upper limit power values ​​of the j-th phase transmission line Lj of the energy storage units in N groups, then the group phase power P of the energy storage units in the first T groups, determined according to the inter-group allocation priority, can be set as follows: pk-Lj =MP pk-Lj The group phase power P of the T+1th energy storage unit pT+1-Lj for: If there are remaining energy storage units, the corresponding group phase power of these remaining units is 0, meaning they do not participate in the allocation. Specifically, combined with... Figure 1 If the sum of the upper limit power values ​​of the j-th phase transmission line Lj of energy storage unit P1 and the j-th phase transmission line Lj of energy storage unit P2 is greater than P_Lj, then the group phase power of the j-th phase of energy storage unit P1 is P_Lj. p1-Lj =MP p1-Lj The phase power of the j-th phase of the energy storage unit is P. p2-Lj =P_Lj-MP p2-Lj Group P3 will not participate.

[0070] If the sum of the upper limit power values ​​of the j-th phase transmission line Lj of N energy storage units is less than the target total operating power P_Lj of the j-th phase transmission line Lj, ​​then the group phase power of the j-th phase of each energy storage unit is P. pk-Lj =MP pk-Lj .

[0071] In the above embodiments, based on the inter-group allocation priority and the upper limit power value of each phase transmission line of each group of energy storage units, the target total working power is determined and allocated to the group phase power of each phase transmission line of each group of energy storage units, so as to complete the target power processing of the central control center.

[0072] In some optional embodiments, during the power allocation process within a group, the method includes: setting a first allocation rule: allocating power to each energy storage device of the energy storage unit according to the priority order of allocation within the group; setting a second allocation rule: in each energy storage device, allocating power to each phase transmission line of the energy storage device according to a preset transmission line phase arrangement order; the priority of the first allocation rule is greater than the priority of the second allocation rule, and during the power allocation process within the group, the initial phase power obtained by each energy storage device of each group of energy storage units on each phase transmission line needs to meet the following requirements:

[0073] P pk,h-Lj ≤INVP pk,h-Lj And Σ J j=1 (P pk,h-Lj )≤BatP pk,h

[0074] Among them, P pk,h-Lj Let INVP be the initial phase power of the h-th energy storage device in any energy storage unit pk on the j-th phase transmission line Lj. pk,h-Lj BatP represents the upper limit of the inverter power of the h-th energy storage device in any group of energy storage units pk on the j-th phase transmission line Lj. pk,h Let J = 3, where J is the upper limit of the battery power of the h-th energy storage device in any group of energy storage units pk.

[0075] For each phase, during each allocation, the energy storage device to be allocated is determined by first considering the upper limit of the inverter power of the inverter of each energy storage device, and then considering the upper limit of the battery power of the energy storage device.

[0076] Specifically, with Figure 1 Taking the first group of energy storage units as an example, assume that the three-phase power allocated by the central control center to energy storage unit P1 is 1000, 2000, and 1500 respectively:

[0077] Specifically, following step S308: the process of power allocation within the group, the final allocation result is as follows:

[0078] Table 1:

[0079]

[0080] The above allocation process is explained as follows.

[0081] The energy storage devices P11, P12, and P13 are allocated in that order (within each group, the allocation priority is also based on the SOC value from largest to smallest). Then, the allocation proceeds in the order of first phase L1, then second phase L2, and finally third phase L3. The initial phase power of each energy storage device on each phase transmission line in each group of energy storage units is determined based on the upper limit of the battery power. The upper limit of the inverter power of the first phase of energy storage device P11 is 1000, and the group phase power of this first phase is 1000. Since 1000 = 1000 and 1000 < the upper limit of the battery power of energy storage device P11, the initial phase power of the first phase of energy storage device P11 is 1000. The upper limit of the inverter power of the first phase of energy storage device P12 is 800, and the group phase power of this first phase is 0. Therefore, the initial phase power of the first phase of energy storage device P12 is 0. Similarly, the initial phase power of the first phase of energy storage device P13 is 0.

[0082] The upper limit of the inverter power of the second phase of energy storage device P11 is 1000, and the group phase power of this second phase is 2000. Since 1000 < 2000, and 1000 = the upper limit of the battery power of energy storage device P11 (2000) - the power of the first phase already allocated (1000), the initial phase power of the second phase of energy storage device P11 is 1000. The upper limit of the inverter power of the second phase of energy storage device P12 is 800, and the remaining group phase power of this second phase is 2000 - 1000 (allocated to energy storage device P11) = 1000. 800 = 80. 0, and 800 < the upper limit of the battery power of energy storage device P12 (3000), therefore the initial phase power of the second phase of energy storage device P12 is 800; the upper limit of the inverter power of the second phase of energy storage device P13 is 900, and the remaining phase power of the second phase is 2000 - 1000 (allocated to energy storage device P11) - 800 (allocated to energy storage device P12) = 200. 200 < 900, and 200 < the upper limit of the battery power of energy storage device P13 (2500), therefore the initial phase power of the second phase of energy storage device P13 is 200.

[0083] The upper limit of the battery power of energy storage device P11 (2000) - the power of the first phase (1000) - the power of the second phase (1000) = 0. Therefore, the initial phase power of the third phase of energy storage device P11 is 0. The upper limit of the inverter power of the third phase of energy storage device P12 is 800, and the combined phase power of this third phase is 1500. Since 800 < 1500, and 800 < the upper limit of the battery power of energy storage device P12 (3000) - the power of the second phase (800), the initial phase power of the third phase is 0. The initial phase power of the second phase of device P12 is 800; the upper limit of the inverter power of the third phase of energy storage device P13 is 900. The remaining phase power of the third phase is 1500 - 0 (allocated to energy storage device P11) - 800 (allocated to energy storage device P12) = 700. 700 < 900, and 700 < the upper limit of the battery power of energy storage device P13, 2500 - the power already allocated to the second phase, 200. Therefore, the initial phase power of the third phase of energy storage device P13 is 700.

[0084] In each group of energy storage units, the host (for example, the host in energy storage unit P1 is energy storage device P11, the host in energy storage unit P2 is energy storage device P21, and the host in energy storage unit P3 is energy storage device P31) calculates the initial phase power of each phase transmission line of each energy storage device, and then sends it to the corresponding energy storage device for final power output.

[0085] In the above embodiments, the group phase power of each group is distributed to the host of the corresponding group. The host then breaks it down into the initial phase power of each phase transmission line of each energy storage device and distributes it to the corresponding energy storage device, thereby reducing data transmission, enabling distributed computing, and improving efficiency.

[0086] In some optional embodiments, the energy dispatching method further includes: an inter-group power reallocation process; the inter-component power reallocation process includes: determining the power matching category of each group of energy storage units based on the group phase power allocated to each group of energy storage units and the sum of the initial phase power of each energy storage device in each group of energy storage units, wherein the power matching category includes a power reduction group and a power increase group; determining the power reduction difference of the power reduction group based on the sum of the group phase power and the initial phase power; and reallocating the power reduction difference to the power increase group.

[0087] If the host cannot allocate output according to the group phase power issued by the central control center, the host can upload the initial phase power of each phase transmission line of each energy storage device within the group after allocation. The central control center can then determine the power matching category of the energy storage unit based on the initial phase power of each phase transmission line of each energy storage device within the group and the group phase power of each phase transmission line of each group of energy storage units. This power matching category includes power reduction groups and power expansion groups.

[0088] In some optional embodiments, the power matching category of each group of energy storage units is determined based on the group phase power allocated to each group of energy storage units and the sum of the initial phase power of each energy storage device in each group of energy storage units. This includes: if a first condition is met on any phase output line Lj of any group of energy storage units, then the k-th group of energy storage units pk is a power reduction group and the j-th phase output line of the k-th group of energy storage units pk needs to be power reduced; if a second condition is met on all phase output lines Lj of any group of energy storage units, then the k-th group of energy storage units pk is a power increase group.

[0089] The first condition is: ;

[0090] The second condition is: ;

[0091] Where pk,h represents the h-th energy storage device in any energy storage unit pk, and H represents the total number of energy storage devices in any energy storage unit pk; P pk,h-Lj Let P be the initial phase power of the h-th energy storage device in any group of energy storage units pk on the j-th phase transmission line Lj; pk-Lj Let pk be the group phase power of any energy storage unit pk on the j-th phase transmission line Lj.

[0092] in, Figure 1 Taking energy storage unit P1 as an example:

[0093] ;

[0094] ;

[0095] .

[0096] If any one of DP1, DP2, and DP3 is greater than 0, then the energy storage unit P1 is a reduced power group; if all three are equal to 0, then the energy storage unit P1 is an increased power group.

[0097] In some optional embodiments, the power reduction difference of the power reduction group is determined based on the sum of the group phase power and the initial phase power of the power reduction group, including:

[0098]

[0099] Where d represents any power reduction group, and H is the total number of energy storage devices in any power reduction group d; P d-Lj P is the group phase power allocated to the j-th phase transmission line Lj of the power reduction group d by the inter-group power allocation process. d，h-LjDP is the initial phase power (DP) allocated to any energy storage device d,h in the power reduction group d by the power allocation process within the group on the j-th phase output line Lj. j It is the power reduction difference of the j-th phase in any of the power reduction groups.

[0100] Determine the power reduction difference for each group and each corresponding phase. For example, calculate the power reduction difference between the allocated group phase power of each phase of each energy storage unit and the sum of the initial allocated phase power of each energy storage device in the group. Figure 1 Taking the energy storage unit P1 as an example of a reduced power group:

[0101]

[0102] Among them, the difference in the first phase of the DP1 group energy storage unit, the difference in the reduced power of the second phase of the first group of DP2 energy storage units, and the difference in the reduced power of the third phase of the first group of DP3 energy storage units; P pk,h-Lj Let be the initial phase power of the h-th energy storage device in energy storage unit pk on the j-th phase transmission line Lj.

[0103] Finally, the power difference from the power reduction is redistributed to the power increase group.

[0104] The group phase power of each phase in the power reduction group is the group phase power of each phase in the previous allocation minus the difference power of each phase. Taking energy storage unit P1 as an example, the adjusted group phase power of the first phase is: For power allocation groups, each host unit needs to redistribute the initial phase power of each phase of each energy storage device based on the power required for each phase of the power allocation group, without requiring the central control center to recalculate the adjusted group phase power.

[0105] To facilitate understanding, a first example is given, in which the phase power of each phase group is too high, while the total allowable power of the batteries in the group is too low, as follows:

[0106] Assuming the control center issues each phase group power of 2000, 2000, 2000 respectively, the inverter information of each energy storage device includes:

[0107] Table 2:

[0108]

[0109] The initial phase power obtained after allocation by the host (the specific allocation method can be found below) is as follows:

[0110] Table 3:

[0111]

[0112] Therefore, it can be seen that after allocation, phases L2 and L3 cannot be allocated and output according to the group phase power issued by the central control center. At this time, energy storage unit P1 cannot output according to the predetermined group phase power, but energy storage unit P2 or energy storage unit P3 is actually capable of outputting. Therefore, the power reduction difference is calculated as follows:

[0113]

[0114] The energy storage unit P2 and energy storage unit P3 are processed in the same way; if energy storage unit P2 and energy storage unit P3 can be executed according to the predetermined group phase power allocation at this time, then the corresponding power reduction difference is 0.

[0115] For any energy storage unit, if at least one of the power reduction differences is greater than 0, the group is marked as a "power reduction group". For any energy storage unit, if all power reduction differences are equal to 0, it is marked as a "power increase group".

[0116] The following calculations are performed for the power reduction groups, with energy storage unit P1 as the power reduction group and energy storage units P2 and P3 as the power increase groups. Since one group cannot handle the group phase power assigned by the control center, other groups will assist in sharing the load. Therefore, after calculating the initial phase power on each phase transmission line of each energy storage device, an adjustment step is required. The adjusted power is (P' pk-Lj (This represents the group phase power on each phase transmission line of each energy storage unit after adjustment).

[0117]

[0118] For power increase groups, the corresponding power to be borne is calculated. The power to be borne by each phase of the power increase group is determined based on the power reduction power difference of each corresponding power decrease group and the number of power increase groups. For example, first determine the sum of the power reduction power differences of each corresponding power decrease group, then calculate the number of power increase groups, and finally determine the power to be borne by each phase of each power increase group by the ratio of the calculated sum to the number.

[0119] Taking the first example above as an example, the power to be undertaken by the first phase of energy storage unit P2 and energy storage unit P3 is calculated as DP1 / 2, the power to be undertaken by the second phase is DP2 / 2, and the power to be undertaken by the third phase is DP3 / 2, where 2 represents the number of power distribution groups.

[0120] Subsequently, the central control center will send the group phase power of the power reduction group to the corresponding host. The host will not need to adjust the initial phase power of each energy storage device on each phase transmission line. The central control center will send the power to be undertaken by the power expansion group to the corresponding power expansion group so that the host can redistribute the initial phase power of each energy storage device on each phase transmission line within the group.

[0121] In the above embodiments, the central control center performs preliminary initial phase power calculations, and the group host performs further target calculations to realize the initial phase power scheduling of complex systems, thereby improving the overall response speed of the system. In addition, the central control center is responsible for balancing the output of each group to ensure the accuracy and reliability of the system power output.

[0122] In some optional embodiments, redistributing the power reduction difference to the power expansion group includes: identifying a target energy storage device in the power expansion group that can bear the power reduction difference of the power reduction group; identifying a target phase in each phase of the target energy storage device that can bear the power reduction difference of each phase of the power reduction group; and redistributing power to the target phase of the target energy storage device based on the power reduction difference of each phase of the power reduction group.

[0123] This application requires identifying the target energy storage devices and target phases that will bear the corresponding power in the power allocation group.

[0124] In some optional embodiments, determining the target energy storage device in the power expansion group that can bear the power reduction difference of the power reduction group may include: in ΣP pk，h-Lj <BatP pk，h In the case of pk-th power expansion group, the h-th energy storage device is determined as the target energy storage device, where P pk，h-Lj BatP is the initial phase power already allocated to the j-th phase of the h-th energy storage device in the pk-th power allocation group. pk，h The upper limit of battery power for the h-th energy storage device in the pk-th power allocation group.

[0125] Specifically, taking the first example above as an example, where ΣP p2，h-Lj <BatP p2,1 Then it is determined that the energy storage device P21 within energy storage unit P2 has the capacity to handle excess power. Here, h represents the h-th energy storage device within energy storage unit P2, and j represents the phase number; P p2，1-Lj The initial phase power allocated to the j-th phase of the energy storage device P21 within group p2 (i.e., the power allocated by the main unit as mentioned above) is as shown in the previous P... p2，1-L1 P p2，1-L2 P p2，1-L3 Here, h=1, and energy storage device P21 is one of the energy storage devices in energy storage unit P2, and so on.

[0126] For ease of understanding, assume the following table shows the parameters of energy storage unit P2:

[0127] Table 4:

[0128]

[0129] According to the above embodiment, the initial phase power allocated to energy storage unit P2 is:

[0130] Table 5:

[0131]

[0132] Therefore, the initial phase power of the first phase of energy storage device P21 is 1000 + the initial phase power of the second phase is 1000 = 2000 = the upper limit of the battery power of energy storage device P21. Therefore, energy storage device P21 does not have the ability to bear excess power, while energy storage devices P22 and P23 do.

[0133] After identifying the target energy storage device, it is also necessary to identify the target phase within the target energy storage device that can handle excess power. Specifically, this includes: in P pk,h-Lj <INVP pk,h-Lj In the case of pk-th power allocation group, the j-th phase of the h-th energy storage device is determined as the target phase, where P pk,h-Lj The initial phase power already allocated to the j-th phase of the h-th energy storage device in the pk-th power allocation group.

[0134] Taking the parameters of the energy storage unit P2 as an example again, where P... p2,h-Lj <INVP p2,h-Lj This indicates that the j-th phase of the energy storage device h in energy storage unit P2 still has the capacity to handle excess power, which is the target phase. For example, the first phase L1 of energy storage device P22 has the capacity to handle excess power, i.e., 0 < 80°. The first phase (0 < 90°), the second phase (20° < 90°), and the third phase (70° < 90°) of energy storage device P23 also have the capacity to handle excess power.

[0135] Once the target energy storage device and target phase are determined, the initial phase power of the target energy storage device can be reallocated to the target phase based on the power required to be borne by each phase of the power allocation group.

[0136] In one optional embodiment, power is reallocated to the target phase of the target energy storage device based on the power reduction difference between each phase of the power reduction group, including:

[0137] exist In this case, the power required to be handled by the target phase of the target energy storage device is determined to be... ;

[0138] Where m is the number of power expansion groups, BatP pk,n P represents the upper limit of the battery power of the target energy storage device n for power enhancement group pk. pn，h-Lj The initial phase power of the target energy storage device h in the power enhancement group pn on the j-th phase transmission line Lj is determined. The excess power that the nth phase of the target energy storage device n in the power allocation group pk needs to handle. The initial phase power of the target energy storage device n in the power allocation group pk on the nth phase transmission line Ln is determined. P represents the upper limit of the inverter power of the inverter of the target energy storage device n in the power allocation group pk on the j-th phase transmission line Lj. pk，n-Lj The initial phase power of the target energy storage device n in the power allocation group pk on the j-th phase transmission line Lj is given by J=3. Based on the sum of the power that the target phase of the target energy storage device needs to bear and the initial phase power of the target phase of the target energy storage device, the adjusted power of the target phase of the target energy storage device is obtained.

[0139] In one optional embodiment, power is reallocated to the target phase of the target energy storage device based on the power reduction difference between each phase of the power reduction group, including:

[0140] exist In this case, the power required to be handled by the target phase of the target energy storage device is determined to be... ;

[0141] Where m is the number of power expansion groups, BatP pk,n P represents the upper limit of the battery power of the target energy storage device n for power enhancement group pk. pn，h-Lj The initial phase power of the target energy storage device h in the power enhancement group pn on the j-th phase transmission line Lj is determined. The excess power that the nth phase of the target energy storage device n in the power allocation group pk needs to handle. The initial phase power of the target energy storage device n in the power allocation group pk on the nth phase transmission line Ln is determined. P represents the upper limit of the inverter power of the target energy storage device n in the power expansion group pk on the j-th phase transmission line Lj. pk，n-Lj The initial phase power of the target energy storage device n in the power allocation group pk on the j-th phase transmission line Lj is given by J=3. Based on the sum of the power that the target phase of the target energy storage device needs to bear and the initial phase power of the target phase of the target energy storage device, the adjusted power of the target phase of the target energy storage device is obtained.

[0142] In the case of discharge, if the energy storage device cannot fully bear the load, the power grid can bear the load. Therefore, it is necessary to determine whether the energy storage device can fully bear the load.

[0143] Specifically, determining whether the target energy storage equipment within a group can fully handle the load can be based on... It's confirmed.

[0144] Taking energy storage unit P2 as an example, for the second phase, energy storage device P23 is the target energy storage device. The power required for the second phase is 50. The maximum discharge power of energy storage device P23's battery (2500) - the initial phase power of the allocated second phase (200) - the initial phase power of the allocated third phase (700) = 1600 > 50. Therefore, the second phase of energy storage device P23 can fully handle the power. For the third phase, energy storage device P23 is the target energy storage device, and the power required for the third phase is 450. The maximum discharge power of energy storage device P23's battery (2500) - the initial phase power of the allocated second phase (200) - the initial phase power of the allocated third phase (700) = 1600 > 450. Therefore, the third phase of energy storage device P23 can fully handle the power.

[0145] When the target phase energy of the target energy storage device is determined to be fully borne, the power it needs to bear is: .

[0146] Specifically, the i-th phase of P2k needs to carry extra power. Then, the final adjusted initial phase power of the j-th phase of the energy storage device P2k in energy storage unit P2 is: ,in, This refers to the initial phase power determined in the previous allocation.

[0147] Specifically, if the nth phase of energy storage device P2k in energy storage unit P2 cannot fully handle the load, then the maximum excess power it can handle is... The remaining uncapable second power is supplied by the grid. Therefore, the final adjusted initial phase power of the j-th phase of the energy storage device P2k in energy storage unit P2 is... ,in, This refers to the initial phase power determined in the previous allocation.

[0148] To avoid cumbersome calculations and to consider feasibility, only one calculation is performed. If it is found after processing that the energy storage unit P3 cannot handle the corresponding power, no further processing is required, and the portion that the energy storage unit P3 cannot handle is provided by the power grid.

[0149] If energy storage unit P2 is unable to handle the initial phase power assigned by the central control center, the same procedure applies to energy storage units P1 and P3. If energy storage unit P3 experiences the same issue, the same procedure applies to energy storage units P1 and P2, which will not be elaborated further here.

[0150] In some optional embodiments, the method further includes: when each energy storage device of each energy storage unit is in the discharge process, P_Lj=PloadLj; when each energy storage device of each energy storage unit is in the charging process, P_Lj=P_chg-PloadLj; wherein, P_Lj is the target total operating power of the j-th phase transmission line Lj, ​​PloadLj is the power required by the load j-th phase, and P_chg is the charging power.

[0151] The operating power of each phase of the power grid is determined based on grid information. Specifically, during discharge, the operating power of each phase of the grid is set to P_feed (a user-defined value). The energy storage system must first meet the load demand (if it can only supply power to the load, it will not feed power to the grid), and then feed the expected power to the grid. For phase L1, the output power required by the three inverters is P_L1 = P_loadL1, and so on for P_L2, P_L3, etc. Here, P_loadL1 is the power that phase L1 needs to supply to the load, P_L1 is the target total operating power of phase L1, P_L2 is the target total operating power of phase L2, and P_L3 is the target total operating power of phase L3. During charging, the target total operating power of each phase of the grid is set to P_chg. The load energy is provided by the grid. The energy storage system is only supplied after the load is subtracted from the charging expectation. The power that the three sets of inverters can obtain from the grid is P_L1 = P_chg - P_loadL1. If P_chg > P_loadL1, then P_L1 = P_chg - P_loadL1; P_L2, P_L3 and so on. Where P_loadL1 is the operating power of the first phase of the load, P_L1 is the target total operating power of the first phase L1, P_L2 is the target total operating power of the second phase L2, and P_L3 is the target total operating power of the third phase L3.

[0152] In the above embodiments, a distributed EMS design scheme can be deployed with relatively low communication pressure. The grouped energy storage system only uploads limited processed data, and the EMS performs overall energy scheduling and balances the power output of each group of energy storage systems in real time. After receiving the initial phase power of each phase, the group host further calculates and processes the data to allocate the initial phase power of each phase to each unit, reducing the amount of data processing and calculation in each link, improving the calculation speed of the initial phase power, and reducing the pressure on the overall data transmission.

[0153] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0154] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 5 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores corresponding target power, etc. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements an energy storage system scheduling method.

[0155] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0156] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0157] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0158] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0159] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0160] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0161] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An energy scheduling method, characterized in that, include: Inter-group allocation priority determination: Based on the remaining battery capacity of each group of energy storage units, the inter-group allocation priority of each group of energy storage units is determined; Inter-group power allocation: Based on the inter-group allocation priority and the upper limit power value of each phase transmission line of the energy storage unit in each group, determine the group phase power allocated to each phase transmission line of each energy storage unit according to the target total working power of each phase. Group priority determination: For each group of energy storage units, the group allocation priority of the energy storage unit is determined based on the remaining battery power of each energy storage device in the energy storage unit. Intra-group power allocation: In each group of energy storage units, the initial phase power of the group phase power allocated to each phase transmission line of each energy storage device is determined according to the intra-group allocation priority, the inverter power limit of each energy storage device's inverter, and the battery power limit of each energy storage device. Wherein, the upper limit power value on each phase transmission line of each energy storage unit is the sum of the upper limit inverter power values ​​of the inverters of each energy storage device in the energy storage unit on the corresponding phase transmission line; The determination of the inter-group allocation priority of the energy storage units based on the remaining battery capacity of each group of energy storage units includes: Determine the average remaining battery capacity of each group of energy storage units; Based on a first target order of the average remaining battery capacity of each group of energy storage units, an initial inter-group allocation priority is determined, wherein when each energy storage unit is in a discharging state, the first target order is from largest to smallest, and when each energy storage unit is in a charging state, the first target order is from smallest to largest. When the energy storage unit corresponding to the largest average remaining battery capacity changes, a first difference between the largest average remaining battery capacity and the smallest average remaining battery capacity is determined. If the first difference is greater than the first threshold, the inter-group allocation priority is updated again according to the first target order of the average remaining battery capacity of each group of energy storage units; If the first difference is less than or equal to the first threshold, the original inter-group allocation priority is maintained.

2. The method according to claim 1, characterized in that, The energy dispatching method further includes: an inter-group power reallocation process; the inter-group power reallocation process includes: Based on the group phase power allocated to each group of energy storage units and the sum of the initial phase power of each energy storage device in each group of energy storage units, the power matching category of each group of energy storage units is determined, wherein the power matching category includes power reduction group and power increase group. The power reduction difference of the power reduction group is determined based on the sum of the group phase power and the initial phase power of the power reduction group; The power reduction difference is then redistributed to the power increase group.

3. The method according to claim 1, characterized in that, The N groups of energy storage units are sequentially labeled as the first group to the Nth group of energy storage units according to the inter-group allocation priority; wherein, determining the group phase power allocated to each phase of each group of energy storage units based on the inter-group allocation priority and the upper limit power value on each phase transmission line of each group of energy storage units includes: If the target total operating power P_Lj of the j-th phase transmission line Lj is less than or equal to the upper limit power value MP of the j-th phase transmission line Lj of the first energy storage unit... p1-Lj Then the group phase power P allocated to the j-th phase transmission line Lj of the first group of energy storage units P1 p1-Lj =P_Lj, and the group phase power P allocated to any energy storage unit pk in the second to Nth groups of energy storage units on the j-th phase transmission line Lj. pk-Lj For: P pk-Lj =0, N≥2; If the target total operating power P_Lj of the j-th phase transmission line Lj is greater than or equal to the sum of the upper limit power values ​​of the j-th phase transmission lines Lj of the N energy storage units... Then allocate any group of energy storage units P pk The group phase power P on the j-th phase transmission line Lj pk-Lj For: P pk-Lj =MP pk-Lj N≥2; if If 1 ≤ T < N, then the group phase power P allocated to any energy storage unit pk in the first to the Tth group of energy storage units on the j-th phase transmission line Lj is... pk-Lj For: P pk-Lj =MP pk-Lj Where k∈[1,T]; and the group phase power P of the T+1th group of energy storage units on the j-th phase transmission line Lj is allocated. pT+1-Lj for: And the group phase power P allocated to any energy storage unit pk from the T+2th group to the Nth group on the j-th phase transmission line Lj. pk-Lj For:P pk-Lj =0,k∈[T+2,N]; Among them, MP pk-Lj Let pk be the upper limit power value of the k-th energy storage unit on the j-th phase transmission line Lj.

4. The method according to claim 1, characterized in that, For each group of energy storage units, the method of determining the intra-group allocation priority of the energy storage units based on the remaining battery power of each energy storage device in the energy storage unit includes: For each group of energy storage units, the initial allocation priority within the group is determined according to the second target order of the remaining battery power of each energy storage device in the energy storage unit. When each energy storage unit is in a discharging state, the second target order is from largest to smallest, and when each energy storage unit is in a charging state, the second target order is from smallest to largest. In each group of energy storage units, if the energy storage device corresponding to the largest remaining battery capacity changes, a second difference between the largest remaining battery capacity and the smallest remaining battery capacity is determined. If the second difference is greater than the second threshold, the group allocation priority is updated again according to the second target order of the remaining battery power of each energy storage device in the energy storage unit. If the second difference is less than or equal to the second threshold, the original intra-group allocation priority is maintained.

5. The method according to claim 1, characterized in that, During the power allocation process within the group, the method includes: The first allocation rule is set: power is allocated to each energy storage device in the energy storage unit according to the priority order of the allocation within the group; A second allocation rule is set: In each energy storage device, power is allocated to each phase transmission line of the energy storage device according to the preset transmission line phase arrangement order; The first allocation rule has a higher priority than the second allocation rule. During the power allocation process within the group, the initial phase power obtained by each energy storage device of each energy storage unit on each phase transmission line must satisfy the following: P pk,h-Lj ≤INVP pk,h-Lj And Σ J j=1 (P pk,h-Lj )≤BatP pk,h Among them, P pk,h-Lj Let INVP be the initial phase power of the h-th energy storage device in any energy storage unit pk on the j-th phase transmission line Lj. pk,h-Lj BatP represents the upper limit of the inverter power of the h-th energy storage device in any group of energy storage units pk on the j-th phase transmission line Lj. pk,h Let J = 3, where J is the upper limit of the battery power of the h-th energy storage device in any group of energy storage units pk.

6. The method according to claim 2, characterized in that, The step of determining the power matching category of each group of energy storage units based on the sum of the group phase power allocated to each group of energy storage units and the initial phase power of each energy storage device in each group of energy storage units includes: If the first condition is met in any phase output line Lj of any group of energy storage units, then the k-th group of energy storage units pk is a power reduction group and the j-th phase output line of the k-th group of energy storage units pk needs to be power reduced. If the second condition is met in all phase output lines Lj of any group of energy storage units, then the energy storage unit pk of the kth group is a power-up group. The first condition is: ; The second condition is: ; Where pk,h represents the h-th energy storage device in any energy storage unit pk, and H represents the total number of energy storage devices in any energy storage unit pk; P pk,h-Lj Let P be the initial phase power of the h-th energy storage device in any group of energy storage units pk on the j-th phase transmission line Lj; pk-Lj Let pk be the group phase power of any energy storage unit pk on the j-th phase transmission line Lj.

7. The method according to claim 2, characterized in that, Determining the power reduction power difference of the power reduction group based on the sum of the group phase power and the initial phase power of the power reduction group includes: Where d represents any power reduction group, and H is the total number of energy storage devices in any power reduction group d; P d-Lj P is the group phase power allocated to the j-th phase transmission line Lj of the power reduction group d by the inter-group power allocation process. d，h-Lj DP is the initial phase power (DP) allocated to any energy storage device d,h in the power reduction group d by the power allocation process within the group on the j-th phase output line Lj. j It is the power reduction difference of the j-th phase in any of the power reduction groups.

8. The method according to claim 7, characterized in that, The step of redistributing the power reduction difference to the power increase group includes: Identify the target energy storage device in the power increase group that can bear the power reduction difference of the power decrease group; Identify the target phase among the phases of the target energy storage device that can bear the power reduction difference of each phase of the power reduction group; Based on the power reduction difference of each phase of the power reduction group, the power is redistributed to the target phase of the target energy storage device.

9. The method according to claim 8, characterized in that, The method of reallocating power to the target phase of the target energy storage device based on the power reduction power difference of each phase of the power reduction group includes: exist In the case of this, the power that the target phase of the target energy storage device needs to bear is determined to be ; Where m is the number of power expansion groups, BatP pk,n P represents the upper limit of the battery power of the target energy storage device n for power enhancement group pk. pn，h-Lj The initial phase power of the target energy storage device h in the power enhancement group pn on the j-th phase transmission line Lj is determined. The excess power that the nth phase of the target energy storage device n in the power allocation group pk needs to handle. The initial phase power of the target energy storage device n in the power allocation group pk on the nth phase transmission line Ln is determined. P represents the upper limit of the inverter power of the target energy storage device n in the power expansion group pk on the j-th phase transmission line Lj. pk，n-Lj The initial phase power of the target energy storage device n in the power enhancement group pk on the j-th phase transmission line Lj is J=3; The adjusted power of the target phase of the target energy storage device is obtained by summing the power required to be borne by the target phase of the target energy storage device and the initial phase power of the target phase of the target energy storage device.

10. The method according to claim 8, characterized in that, The method of reallocating power to the target phase of the target energy storage device based on the power reduction power difference of each phase of the power reduction group includes: exist In the case of this, the power that the target phase of the target energy storage device needs to bear is determined to be ; Where m is the number of power expansion groups, BatP pk,n P represents the upper limit of the battery power of the target energy storage device n for power enhancement group pk. pn，h-Lj The initial phase power of the target energy storage device h in the power enhancement group pn on the j-th phase transmission line Lj is determined. The excess power that the nth phase of the target energy storage device n in the power allocation group pk needs to handle. The initial phase power of the target energy storage device n in the power allocation group pk on the nth phase transmission line Ln is determined. P represents the upper limit of the inverter power of the target energy storage device n in the power expansion group pk on the j-th phase transmission line Lj. pk，n-Lj The initial phase power of the target energy storage device n in the power enhancement group pk on the j-th phase transmission line Lj is J=3; The adjusted power of the target phase of the target energy storage device is obtained by summing the power required to be borne by the target phase of the target energy storage device and the initial phase power of the target phase of the target energy storage device.

11. An energy dispatching system, employing the energy dispatching method according to any one of claims 1 to 10, characterized in that, It includes multiple sets of energy storage units and a central control center that is communicatively connected to the multiple sets of energy storage units. Each set of energy storage units includes a host and at least one energy storage device that is communicatively connected to the host. The central control center is used to obtain the remaining battery power of each group of energy storage units and to perform the process of determining the inter-group allocation priority and the inter-group power allocation of each group of energy storage units. Each of the aforementioned hosts is used to perform the group priority determination process and the group power allocation process; Each energy storage device is used to operate based on the initial phase power allocated to each phase of the energy storage device by the host.

12. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 10.

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