Distributed energy storage cabinet output control method and system for power grid response demand

Abstract

The present invention discloses a distributed energy storage cabinet output control method and system for power grid response demand, belonging to the field of power control technology. The key points of the technical solution include: determining a transmission terminal according to a power grid instruction, and obtaining a first transmission demand, wherein the first transmission loss is determined according to the distance between the power consumption terminal and the default energy storage cabinet; each distributed energy storage cabinet forms a direct connection relationship with at least one distributed energy storage cabinet; obtaining the storage capacity of the default energy storage cabinet, calculating a first transmittable capacity according to the storage capacity, and judging whether the first transmittable capacity meets the first transmission demand; if not, constructing a transmission sequence according to the first transmittable capacity, and determining a second transmission demand; updating the transmission sequence according to the second transmission demand, obtaining a final transmission sequence, and transmitting power to the power consumption terminal according to the final transmission sequence. The present invention achieves the transmission target with the minimum loss through the coordinated transmission of multiple energy storage cabinets based on the distance between the power consumption terminal and the energy storage cabinet.

Description

Technical Field

[0001] The present invention relates to the field of power control technology, and more specifically to a distributed energy storage cabinet output control method and system for power grid response demand. Background Art

[0002] As the global energy structure accelerates its transformation toward renewable energy, the proportion of distributed energy systems in the power grid is increasing. From industrial parks, commercial centers to residential communities, energy storage cabinets are widely deployed to meet the energy storage and management needs in different scenarios. However, the current energy storage cabinet control scheme is usually only applied to an independent energy storage cabinet. For example, a charging and discharging method of an energy storage system and an energy storage cabinet are provided in a Chinese patent application with publication number CN118554495A.

[0003] However, the capacity and adjustment capabilities of a single energy storage cabinet are limited, making it difficult to meet large-scale and complex electricity demands, so the existing technology has shortcomings. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a distributed energy storage cabinet output control method and system for power grid response demand, which achieves the transmission goal with minimal loss through the coordinated transmission of multiple energy storage cabinets based on the distance between the power terminal and the energy storage cabinet.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a distributed energy storage cabinet output control method for power grid response demand, wherein the distributed energy storage cabinets are multiple and controlled by a power dispatching center, each of the distributed energy storage cabinets corresponds to a power terminal, and the minimum loss output control method is executed by the power dispatching center, and the minimum loss output control method includes:

[0007] Determine a power transmission terminal according to a power grid instruction, and obtain a first power transmission demand, wherein the first power transmission demand is determined according to the power transmission demand of the power consumption terminal and a first transmission loss, wherein the first transmission loss is determined according to the distance between the power consumption terminal and a default energy storage cabinet, and the default energy storage cabinet is a distributed energy storage cabinet corresponding to the power consumption terminal; each of the distributed energy storage cabinets forms a direct connection relationship with at least one of the distributed energy storage cabinets;

[0008] Acquire the power storage amount of the default energy storage cabinet, calculate a first transmittable power amount according to the power storage amount, and determine whether the first transmittable power amount meets the first power transmission demand;

[0009] If not, constructing a power transmission sequence according to the first transmittable power amount, and determining a second power transmission demand;

[0010] The power transmission sequence is updated according to the second power transmission demand to obtain a final power transmission sequence, and power is transmitted to the power user terminal according to the final power transmission sequence.

[0011] As a further improvement of the present invention, constructing a power transmission sequence according to the first transmittable power amount and determining a second power transmission demand includes:

[0012] If the first transmittable power is zero, the power transmission sequence is an empty sequence, and the second power transmission demand is determined according to the first power transmission demand;

[0013] If the first transmittable power is not zero, the power transmission sequence is based on the first transmittable power and the default energy storage cabinet configuration, and the second power transmission demand is determined based on the first power transmission demand and the first transmittable power.

[0014] As a further improvement of the present invention, the second power transmission demand is determined according to the first power transmission demand and the first transmittable amount of electricity, including:

[0015] According to the default energy storage cabinet, determine the directly connected energy storage cabinet corresponding to each default energy storage cabinet;

[0016] Obtaining a second transmission loss corresponding to the distance between the direct-connected energy storage cabinet and the power terminal;

[0017] The second power transmission demand is obtained according to the second transmission loss, the first transmittable amount of power and the first power transmission demand.

[0018] As a further improvement of the present invention, updating the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence includes:

[0019] Execute a first iterative operation, the first iterative operation including: determining whether the directly-connected energy storage cabinet can meet the second power transmission demand; if not, updating the directly-connected energy storage cabinet and the second power transmission demand; repeating the first iterative operation until the current directly-connected energy storage cabinet meets the current second power transmission demand; and outputting the current power transmission sequence as the final power transmission sequence.

[0020] As a further improvement of the present invention, the determining whether the directly connected energy storage cabinet can meet the second power transmission demand includes:

[0021] According to the distance between the direct-connected energy storage cabinet and the default energy storage cabinet, the direct-connected energy storage cabinets are sorted in ascending order to obtain a queuing sequence;

[0022] Execute a second iterative operation, wherein the second iterative operation includes obtaining the current storage capacity of the first directly-connected energy storage cabinet, and obtaining the corresponding second transmittable capacity according to the storage capacity of the first directly-connected energy storage cabinet, determining whether the second transmittable capacity is zero, and if not, updating the transmission sequence according to the second transmittable capacity and the first directly-connected energy storage cabinet, determining whether the second transmittable capacity meets the second transmission demand, and if not, updating the second transmission demand and the queuing sequence, and repeating the second iterative operation until a preset termination condition is met, and the first directly-connected energy storage cabinet is the directly-connected energy storage cabinet at the head of the queuing sequence;

[0023] According to the satisfied termination condition, it is determined whether the directly connected energy storage cabinet can meet the second power transmission demand.

[0024] As a further improvement of the present invention, if there are multiple directly-connected energy storage cabinets, updating the directly-connected energy storage cabinets includes:

[0025] According to each of the directly connected energy storage cabinets, determining an extended energy storage cabinet corresponding to each of the directly connected energy storage cabinets;

[0026] Determine a second direct-connected energy storage cabinet according to the extended energy storage cabinet corresponding to each direct-connected energy storage cabinet, wherein the second direct-connected energy storage cabinet is the direct-connected energy storage cabinet with the largest number of corresponding extended energy storage cabinets;

[0027] The directly connected energy storage cabinet is updated to an extended energy storage cabinet corresponding to the second directly connected energy storage cabinet.

[0028] As a further improvement of the present invention, the updating of the second power transmission demand includes:

[0029] Calculate a third transmission loss according to the distance between the extended energy storage cabinet corresponding to the second directly-connected energy storage cabinet and the power terminal;

[0030] The second power transmission demand is updated according to the third transmission loss.

[0031] As a further improvement of the present invention, according to the default energy storage cabinet, determining the directly connected energy storage cabinet corresponding to each default energy storage cabinet includes:

[0032] Using the distributed energy storage cabinet that is closest to the default energy storage cabinet as the directly connected energy storage cabinet;

[0033] The distributed energy storage cabinet whose distance from the default energy storage cabinet is within a preset range is used as the directly connected energy storage cabinet.

[0034] As a further improvement of the present invention, the second transmission loss is determined according to resistance loss, capacitance loss and inductance loss in the power transmission process.

[0035] As a further improvement of the present invention, the present invention provides a distributed energy storage cabinet output control system for power grid response demand, comprising:

[0036] An acquisition module is provided, which determines a power transmission terminal according to a power grid instruction and acquires a first power transmission demand, wherein the first power transmission demand is determined according to a power transmission demand of a power consumption terminal and a first transmission loss, wherein the first transmission loss is determined according to a distance between the power consumption terminal and a default energy storage cabinet, wherein the default energy storage cabinet is a distributed energy storage cabinet corresponding to the power consumption terminal; each of the distributed energy storage cabinets forms a direct connection relationship with a plurality of the distributed energy storage cabinets;

[0037] A judgment module, which obtains the storage capacity of the default energy storage cabinet, calculates a first transmittable power according to the storage capacity, and judges whether the first transmittable power meets the first power transmission demand;

[0038] a determination module, if not, constructing a power transmission sequence according to the first transmittable power quantity and determining a second power transmission requirement;

[0039] An updating module updates the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence, and transmits power to the power user terminal according to the final power transmission sequence.

[0040] The present invention comprehensively considers the power transmission demand of the power terminal and the first transmission loss to determine the first power transmission demand, and judges whether the default energy storage cabinet corresponding to the power terminal can meet the first power transmission demand. If the power transmission demand cannot be met, the second power transmission demand is determined based on the first transmission demand and the first transmission loss, and the directly connected energy storage cabinet is selected according to the second transmission demand and the transmission loss, and the transmission sequence is updated at the same time. Finally, power is transmitted to the power terminal according to the final transmission sequence to achieve the transmission goal with minimal loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the process steps of the present invention;

[0042] Figure 2 This is a schematic diagram of the scenario when there is only one directly connected energy storage cabinet;

[0043] Figure 3 This is a schematic diagram of a scenario when there are multiple directly connected energy storage cabinets;

[0044] Figure 4 Schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations of the technical solution of the present invention.

[0046] The term "and / or" in the following text is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0047] like Figure 1 As shown, an embodiment of the present application provides a distributed energy storage cabinet output control method for power grid response demand, including:

[0048] Determine the power transmission terminal according to the power grid instruction, and obtain the first power transmission demand, the first power transmission demand is determined according to the power transmission demand of the power consumption terminal and the first transmission loss, the first transmission loss is determined according to the distance between the power consumption terminal and the default energy storage cabinet, the default energy storage cabinet is the distributed energy storage cabinet corresponding to the power consumption terminal; each distributed energy storage cabinet forms a direct connection relationship with at least one distributed energy storage cabinet;

[0049] Obtaining the storage capacity of the default energy storage cabinet, calculating the first transmittable power according to the storage capacity, and determining whether the first transmittable power meets the first power transmission demand;

[0050] If not, constructing a power transmission sequence according to the first transmittable power quantity and determining a second power transmission demand;

[0051] The power transmission sequence is updated according to the second power transmission demand to obtain a final power transmission sequence, and power is transmitted to the power user terminal according to the final power transmission sequence.

[0052] There are multiple distributed energy storage cabinets controlled by a power dispatching center, each distributed energy storage cabinet corresponds to a power terminal, the control method is executed by the power dispatching center, and each distributed energy storage cabinet can communicate with each other.

[0053] This embodiment comprehensively considers the power transmission demand of the power terminal and the first transmission loss to determine the first power transmission demand, and determines whether the default energy storage cabinet corresponding to the power terminal can meet the first power transmission demand. If the default energy storage cabinet cannot meet the power transmission demand, the second power transmission demand is determined based on the first transmission demand and the first transmission loss, and the directly connected energy storage cabinet is selected according to the second transmission demand and the transmission loss, and the transmission sequence is updated at the same time, and finally power is transmitted to the power terminal according to the final transmission sequence to achieve the transmission target with minimal loss.

[0054] Furthermore, the embodiment of the present application provides a step of constructing a power transmission sequence according to the first transmittable power quantity and determining a second power transmission requirement, including:

[0055] If the first transmittable power is zero, the power transmission sequence is an empty sequence, and the second power transmission demand is determined according to the first power transmission demand;

[0056] If the first transmittable power is not zero, the power transmission sequence is configured according to the first transmittable power and the default energy storage cabinet, and the second power transmission demand is determined according to the first power transmission demand and the first transmittable power.

[0057] Among them, taking into account the problem of energy conversion efficiency of the energy storage cabinet during the discharge process, the first transmittable power is 90% of the storage power of the default energy storage cabinet.

[0058] Specifically, if the first transmittable power is zero, the transmission sequence , if the first transmittable power is not zero and the default energy storage cabinet does not meet the first transmission demand, the transmission sequence ,in is the number of the default energy storage cabinet, The first transmittable amount of electricity.

[0059] Furthermore, this embodiment provides a step of determining a second power transmission requirement according to a first power transmission requirement when the first transmittable power quantity is zero, including:

[0060] According to the default energy storage cabinet, determine the directly connected energy storage cabinet corresponding to each default energy storage cabinet;

[0061] According to the distance between the directly connected energy storage cabinet and the power consumption terminal, the corresponding second transmission loss is obtained;

[0062] A second power transmission demand is obtained according to the second transmission loss and the first power transmission demand.

[0063] For example, assuming that the second transmission loss is , then the second transmission demand , The first transmission demand.

[0064] Among them, for each directly connected energy storage cabinet, its corresponding second transmission loss is ,in, It represents the resistance loss in the process of transmitting electricity to the power terminal. It represents the capacitance loss in the process of transmitting power to the power terminal. It represents the inductance loss in the process of transmitting power to the power terminal. represents the current, represents the resistivity of the transmission line, Indicates the length of the transmission line between the direct-connected energy storage cabinet and the power terminal. represents the cross-sectional area of ​​the transmission line, Indicates voltage, Indicates the frequency of alternating current, Represents the distributed capacitance per unit length, Indicates the time it takes for the direct-connected energy storage cabinet to transmit power to the power terminal. Represents the inductance per unit length.

[0065] In this embodiment, the transmission loss is determined by the length of the transmission line, so that the power is transmitted along a path with less loss as much as possible, thereby improving the overall transmission efficiency of the power and reducing unnecessary energy loss.

[0066] Furthermore, this embodiment provides a step of determining a second power transmission requirement according to the first power transmission requirement and the first power transmission requirement when the first transmittable power quantity is not zero, including:

[0067] According to the default energy storage cabinet, determine the directly connected energy storage cabinet corresponding to each default energy storage cabinet;

[0068] According to the distance between the directly connected energy storage cabinet and the power consumption terminal, the corresponding second transmission loss is obtained;

[0069] A second power transmission demand is obtained according to the second transmission loss, the first transmittable amount of electricity and the first power transmission demand.

[0070] For example, assuming that the second transmission loss is , the first transmission demand is , then the second transmission demand , It is the first transmittable amount of electricity.

[0071] Furthermore, in the case where the first transmittable power is not zero, this embodiment provides a step of determining, according to the default energy storage cabinet, a directly connected energy storage cabinet corresponding to each default energy storage cabinet, including:

[0072] The distributed energy storage cabinet that is closest to the default energy storage cabinet is used as the direct-connected energy storage cabinet;

[0073] The distributed energy storage cabinets that are within the preset distance from the default energy storage cabinet are used as direct-connected energy storage cabinets.

[0074] Among them, the preset range needs to ensure that there is at least one distributed energy storage cabinet within this range; the distributed energy storage cabinet that is closest to the default energy storage cabinet is used as the direct-connected energy storage cabinet, which means that each default energy storage cabinet corresponds to only one direct-connected energy storage cabinet; if the distributed energy storage cabinets that are within the preset range from the default energy storage cabinet are used as direct-connected energy storage cabinets, then each default energy storage cabinet may correspond to multiple direct-connected energy storage cabinets.

[0075] Further, if each default energy storage cabinet corresponds to only one direct-connected energy storage cabinet, and each direct-connected energy storage cabinet corresponds to only one extended energy storage cabinet, this embodiment provides a step of updating the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence, including:

[0076] An iterative operation is performed, the iterative operation including: obtaining the storage capacity of the directly-connected energy storage cabinet, and calculating the second transmittable power according to the storage capacity of the directly-connected energy storage cabinet, determining whether the second transmittable power is zero, if not, updating the power transmission sequence according to the second transmittable power and the directly-connected energy storage cabinet, determining whether the second transmittable power meets the second power transmission demand, if not, updating the second power transmission demand and the directly-connected energy storage cabinet, repeating the above steps until the second transmittable power meets the second power transmission demand, and outputting a final power transmission sequence.

[0077] Furthermore, the step of determining the extended energy storage cabinet corresponding to each directly connected energy storage cabinet includes:

[0078] The distributed energy storage cabinet that is closest to the directly connected energy storage cabinet is used as an extended energy storage cabinet;

[0079] The distributed energy storage cabinets that are within a predetermined distance from the directly connected energy storage cabinets are regarded as extended energy storage cabinets.

[0080] Among them, the distributed energy storage cabinet that has been determined as the default energy storage cabinet or the directly connected energy storage cabinet cannot be used as an extended energy storage cabinet. If the distributed energy storage cabinet closest to the directly connected energy storage cabinet has been determined as the default energy storage cabinet or the directly connected energy storage cabinet, the distributed energy storage cabinet that is the second closest to the directly connected energy storage cabinet will be used as an extended energy storage cabinet, and so on. The predetermined range needs to ensure that there is at least one distributed energy storage cabinet that has not been determined as a default energy storage cabinet or a directly connected energy storage cabinet within this range. Similar to the step of determining the directly connected energy storage cabinet, the distributed energy storage cabinet that is closest to the directly connected energy storage cabinet is used as an extended energy storage cabinet, which means that each directly connected energy storage cabinet corresponds to only one extended energy storage cabinet; the distributed energy storage cabinets that are within the predetermined range of the distance to the directly connected energy storage cabinet are used as extended energy storage cabinets, and each directly connected energy storage cabinet may correspond to multiple extended energy storage cabinets.

[0081] Furthermore, this embodiment provides a step of updating the second power transmission requirement and the directly connected energy storage cabinet, including:

[0082] According to each directly connected energy storage cabinet, determine the extended energy storage cabinet corresponding to each directly connected energy storage cabinet;

[0083] Updating the directly connected energy storage cabinet to the extended energy storage cabinet corresponding to the second directly connected energy storage cabinet;

[0084] According to the second transmittable power, the second power transmission demand, and the distance between the extended energy storage cabinet and the power consumption terminal, the third power transmission demand is calculated, and the second power transmission demand is updated to the third power transmission demand.

[0085] For example, Figure 2 As shown, Indicates the default energy storage cabinet. Indicates the directly connected energy storage cabinet corresponding to the default energy storage cabinet. Assuming that the power demand of the power terminal is 1000 degrees, The amount of power that can be transferred is 500 degrees, the first transmission loss is 1 degree, and the second transmission loss is is 2 degrees, at this time the second transmission demand is 503 degrees. First, according to The second transferable power can be calculated by the storage capacity. The specific calculation method is to determine Whether the corresponding power consumption terminal needs power transmission, Figure 2 Not shown The corresponding power consumption terminal, if yes, calculate After the power transmission to the corresponding power terminal is completed, the remaining storage capacity is 90% of the remaining storage capacity as the second transferable capacity. Then determine whether the second transferable capacity is zero. If not, according to the second transferable capacity and Update the transmission sequence, that is, the transmission sequence at this time ,in for The corresponding second transferable amount, assuming is 300 degrees, and then it is determined whether the second transmittable power meets the second power transmission demand, that is, Is it greater than or equal to , if so, the final transmission sequence is By transmitting electricity to the power consumption terminal according to this transmission sequence, the goal of minimizing losses can be achieved while meeting the transmission demand.

[0086] If not, the transmission sequence is still , then you need to update the second transmission demand and the directly connected energy storage cabinet. First, determine Corresponding external energy storage cabinet And update the direct-connected energy storage cabinet to an extended energy storage cabinet , and then calculate the third transmission demand ,in express The loss of transmitting electricity to the electricity terminal is calculated based on The distance from the power terminal is determined, assuming is 3 degrees, at this time is 206 degrees, and finally the second transmission demand is updated to the third transmission demand, and the above steps are repeated until the second transmittable power meets the second transmission demand, and the final transmission sequence is output. Specifically, in this example, assuming The transmittable power is 300 kWh, which can meet the second transmission demand. The final transmission sequence should be ;

[0087] Among them, if the second transmittable power is zero, there is no need to update the transmission sequence, and the step of updating the second transmission demand and directly connecting the energy storage cabinet is directly performed and repeated until the second transmittable power meets the second transmission demand and the final transmission sequence is output.

[0088] This embodiment updates the direct-connected energy storage cabinet based on the distance as a reference, which helps to shorten the transmission distance, reduce line losses during the transmission process, and improve the transmission efficiency. The second transmission demand is updated based on the updated distance between the direct-connected energy storage cabinet and the power terminal to fully meet the power transmission needs of the power terminal.

[0089] Further, if there are multiple direct-connected energy storage cabinets corresponding to the default energy storage cabinet, and each direct-connected energy storage cabinet corresponds to at least one extended energy storage cabinet, this embodiment provides a step of updating the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence, including:

[0090] Execute a first iterative operation, the first iterative operation including determining whether the directly connected energy storage cabinet can meet the second power transmission demand, if not, updating the directly connected energy storage cabinet and the second power transmission demand, repeating the first iterative operation until the current directly connected energy storage cabinet meets the current second power transmission demand, and outputting the current power transmission sequence as the final power transmission sequence.

[0091] Furthermore, this embodiment provides a step of determining whether the directly connected energy storage cabinet can meet the second power transmission demand, including:

[0092] According to the distance between the direct-connected energy storage cabinet and the default energy storage cabinet, the direct-connected energy storage cabinets are sorted in ascending order to obtain a queuing sequence;

[0093] Execute a second iterative operation, the second iterative operation including: obtaining the current storage capacity of the first directly connected energy storage cabinet, and obtaining the corresponding second transmittable power according to the storage capacity of the first directly connected energy storage cabinet, judging whether the second transmittable power is zero, if not, updating the power transmission sequence according to the second transmittable power and the first directly connected energy storage cabinet, judging whether the second transmittable power meets the second power transmission demand, if not, updating the second power transmission demand and the queuing sequence, repeating the second iterative operation until a preset termination condition is met, and the first directly connected energy storage cabinet is the directly connected energy storage cabinet at the top of the queuing sequence;

[0094] According to the termination condition that is satisfied, it is determined whether the directly connected energy storage cabinet can meet the second power transmission demand.

[0095] For example, Figure 3 As shown, It is the default energy storage cabinet. , , , for The corresponding directly connected energy storage cabinets are sorted in ascending order according to the distance between each directly connected energy storage cabinet and the power terminal to obtain a queue sequence , the first iteration is for Carry out, when When the second transmission demand cannot be met, the queue sequence needs to be updated to obtain the updated queue sequence , then for Perform the second iteration, and so on.

[0096] In this embodiment, when there are multiple directly connected energy storage cabinets, the multiple directly connected energy storage cabinets are sorted to form a queuing sequence, and each iteration operation is performed on the directly connected energy storage cabinet at the head of the queuing sequence. At the same time, the second power transmission demand used in the adjacent next iteration operation needs to be updated according to the result of the adjacent previous iteration operation, so that the updated second power transmission demand is more suitable for the directly connected energy storage cabinet targeted by the next iteration operation, thereby making a more accurate judgment to generate a more accurate power transmission plan. In addition, this method avoids the confusion and disorder that may occur when the second transmittable power of multiple directly connected energy storage cabinets is judged at the same time, which helps to improve the logic and operability of the algorithm. At the same time, this embodiment gives priority to energy storage cabinets with short distances based on the queuing sequence, which can ensure that paths with short distances and low losses are preferentially selected during power transmission, avoiding the waste of resources caused by long-distance power transmission.

[0097] Furthermore, this embodiment provides a step of updating a direct-connected energy storage cabinet, including:

[0098] According to each directly connected energy storage cabinet, determine the extended energy storage cabinet corresponding to each directly connected energy storage cabinet;

[0099] According to the extended energy storage cabinets corresponding to each directly-connected energy storage cabinet, a second directly-connected energy storage cabinet is determined, where the second directly-connected energy storage cabinet is the directly-connected energy storage cabinet with the largest number of corresponding extended energy storage cabinets;

[0100] Update the directly connected energy storage cabinet to the extended energy storage cabinet corresponding to the second directly connected energy storage cabinet.

[0101] Furthermore, this embodiment provides a step of updating the second power transmission requirement, including:

[0102] A third transmission loss is calculated according to the distance between the extended energy storage cabinet corresponding to the second directly connected energy storage cabinet and the power terminal;

[0103] The second power transmission demand is updated according to the third transmission loss.

[0104] For each extended energy storage cabinet, the calculation method of the corresponding third transmission loss can be the same as the calculation method of the second transmission loss. Indicates the length of the transmission line between the external energy storage cabinet and the power terminal. Indicates the time it takes for the extended energy storage cabinet to transmit power to the power consumption terminal.

[0105] For example, Figure 3 As shown, It is the default energy storage cabinet. , , , for The corresponding direct-connected energy storage cabinet, the solid coil is the direct-connected energy storage cabinet circle of the default energy storage cabinet. According to the distance between each direct-connected energy storage cabinet and the power terminal, the direct-connected energy storage cabinets are sorted in ascending order to obtain the queue sequence , and the first , as the first directly connected energy storage cabinet, and calculate the second transferable power corresponding to the first directly connected energy storage cabinet , then determine whether the second transmittable power is zero, if not, update the power transmission sequence according to the second transmittable power and the first directly connected energy storage cabinet, at this time , then determine whether the second transmittable power meets the second power transmission demand, if not, update the second power transmission demand and the queue sequence. Specifically, the updated second power transmission demand is based on the original second power transmission demand, the second transmittable power and The loss of electricity transmission to the electricity consumption terminal is determined, and the updated queue sequence is eliminated The queue sequence after that, that is, the queue sequence at this time Then repeat the above steps until a preset termination condition is met, wherein the preset termination condition is that the queue sequence is empty or the second transmittable power quantity meets the second power transmission demand.

[0106] If the second transmittable power is zero, there is no need to perform the step of updating the power transmission sequence according to the second transmittable power and the first directly connected energy storage cabinet, and the step of updating the second power transmission demand and the queuing sequence is directly performed and repeated.

[0107] If the termination condition is that the queue sequence is empty, it means that the default energy storage cabinet and the direct-connected energy storage cabinet cannot meet the power transmission demand of the power terminal. At this time, the direct-connected energy storage cabinet needs to be updated. Specifically, according to each direct-connected energy storage cabinet, the corresponding extended energy storage cabinet of each direct-connected energy storage cabinet is determined. Figure 3 The dotted circle in the middle is the extended energy storage cabinet circle corresponding to each directly connected energy storage cabinet, that is, The corresponding extended energy storage cabinet is , and , The corresponding extended energy storage cabinet is and , The corresponding extended energy storage cabinet is and , The corresponding extended energy storage cabinet is and According to the number of extended energy storage cabinets corresponding to each direct-connected energy storage cabinet, the second direct-connected energy storage cabinet is determined to be , and then update the direct-connected energy storage cabinet to The corresponding extended energy storage cabinet is selected and the above steps are repeated. Specifically, assuming that the power demand of the power terminal is 1000 degrees, the default energy storage cabinet And directly connected energy storage cabinet , , , While satisfying the transmission loss, 800 kWh of electricity can be provided to the power terminal. The remaining electricity needs The corresponding extended energy storage cabinet provides, if The corresponding extended energy storage cabinet still cannot make up the remaining power. , and The second directly connected energy storage cabinet and its corresponding extended energy storage cabinet are further determined until the needs of the power consumption terminal can be met.

[0108] This embodiment determines the second directly-connected energy storage cabinet according to the number of extended energy storage cabinets corresponding to each directly-connected energy storage cabinet, and judges the extended energy storage cabinet corresponding to the second directly-connected energy storage cabinet, which can reduce the number of iterations and is conducive to quickly filling the power gap.

[0109] Furthermore, since each distributed energy storage cabinet can communicate with each other, the distributed energy storage cabinet output control method for power grid response demand provided in the embodiment of the present application can also be directly executed by each energy storage cabinet. Exemplarily, when there are multiple directly connected energy storage cabinets corresponding to the default energy storage cabinet, the power terminal can directly send the first power transmission demand to the default energy storage cabinet corresponding to it. When the default energy storage cabinet cannot meet the first power transmission demand, the default energy storage cabinet will generate a second transmission demand based on its own transmittable power and the second transmission loss and send it to the first directly connected energy storage cabinet in the queue sequence. If the directly connected energy storage cabinet cannot meet the second transmission demand, the second transmission demand and the queue sequence are updated using the method introduced above, and the updated second transmission demand is sent to the next directly connected energy storage cabinet, and the judgment step is repeated. If the queue sequence cannot meet the power transmission demand of the power terminal, it is necessary to update the direct-connected energy storage cabinet, that is, it is necessary to determine the second direct-connected energy storage cabinet and its corresponding extended energy storage cabinet. At this time, each direct-connected energy storage cabinet sends the number of its currently available extended energy storage cabinets to other direct-connected energy storage cabinets. After that, each direct-connected energy storage cabinet compares the number of its corresponding extended energy storage cabinets with the received number, and sends the number of the direct-connected energy storage cabinet with a larger number of corresponding extended energy storage cabinets to other direct-connected energy storage cabinets, and carries the voting mark to form a valid vote. Finally, each direct-connected energy storage cabinet compares the direct-connected energy storage cabinet with the most votes in the voting mark, thereby reaching a "consensus" and finally updating the direct-connected energy storage cabinet through the extended energy storage cabinet corresponding to the direct-connected energy storage cabinet. This method does not require the power to be sent to the dispatching center in real time, avoiding power loss and network consumption when idle.

[0110] It can be seen from the above embodiments that the embodiments of the present application set up direct-connected energy storage cabinets and extended energy storage cabinets. The direct-connected energy storage cabinets and extended energy storage cabinets are determined based on the transmission distance. When the power terminal needs to use electricity, it is first powered by the nearest default energy storage cabinet. When the power supply performance of the default energy storage cabinet cannot meet the requirements, the "innermost" energy storage cabinet circle formed by at least one direct-connected energy storage cabinet of the default energy storage cabinet is used for power supply. The direct-connected energy storage cabinets in each level of the energy storage cabinet circle can communicate with each other, that is, the power supply information can be shared, so as to set the form in combination with the queue sequence. The priorities are formed so that the directly connected energy storage cabinets can spontaneously distribute power according to the performance requirements of the power supply. When the power supply demand cannot be met within the first-level directly connected energy storage cabinet circle, one of the directly connected energy storage cabinets is used as the second directly connected energy storage cabinet to form an extended energy storage cabinet circle corresponding to the second directly connected energy storage cabinet. That is, the second-level directly connected energy storage cabinet circle is formed at this time, and it is gradually iterated to meet the power supply demand. That is, when the power supply demand is too large, the third-level directly connected energy storage cabinet circle and the fourth-level directly connected energy storage cabinet circle may appear in the above manner, and this application does not impose any restrictions on this.

[0111] In the above preferred embodiment, the second directly connected energy storage cabinet selects the energy storage cabinet with the most extended energy storage cabinets in the circle of directly connected energy storage cabinets, thereby ensuring that the supply performance of the next level of directly connected energy storage cabinet circle extended each time is the largest, thereby reducing the further iterative extension of the circle of directly connected energy storage cabinets. The embodiment of the present application provides a distributed energy storage cabinet output control method for power grid response demand, determines the transmission loss by the length of the transmission path, and determines the various distributed energy storage cabinets that transmit power to the power terminal by the distance between the distributed energy storage cabinets, and the method provided by the embodiment of the present application is applicable to different scenarios, and the specific selection method of the direct-connected energy storage cabinet can be determined according to actual needs.

[0112] Further, such as Figure 4 As shown, the embodiment of the present application provides a distributed energy storage cabinet output control system for power grid response demand, including:

[0113] An acquisition module determines a power transmission terminal according to a power grid instruction and acquires a first power transmission demand, wherein the first power transmission demand is determined according to the power transmission demand of the power consumption terminal and a first transmission loss, wherein the first transmission loss is determined according to the distance between the power consumption terminal and a default energy storage cabinet, wherein the default energy storage cabinet is a distributed energy storage cabinet corresponding to the power consumption terminal; each distributed energy storage cabinet forms a direct connection relationship with multiple distributed energy storage cabinets;

[0114] A judgment module is used to obtain the storage capacity of the default energy storage cabinet, calculate the first transmittable power according to the storage capacity, and judge whether the first transmittable power meets the first power transmission demand;

[0115] The determination module, if not, constructs a power transmission sequence according to the first transmittable power quantity and determines a second power transmission requirement;

[0116] The updating module updates the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence, and transmits power to the power user terminal according to the final power transmission sequence.

[0117] The embodiments of the present application provide a distributed energy storage cabinet output control method and system for power grid response demand. When the first energy storage cabinet corresponding to the power terminal cannot meet the power transmission demand, the power transmission sequence is determined by transmission loss to achieve the power transmission target with minimal loss.

[0118] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0119] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0120] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0121] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A distributed energy storage cabinet output control method for power grid response demand, characterized in that: There are multiple distributed energy storage cabinets controlled by a power dispatching center, each distributed energy storage cabinet corresponds to a power terminal, and the distributed energy storage cabinet output control method is executed by the power dispatching center. The distributed energy storage cabinet output control method includes: Determine a power transmission terminal according to a power grid instruction, and obtain a first power transmission demand, wherein the first power transmission demand is determined according to the power transmission demand of the power consumption terminal and a first transmission loss, wherein the first transmission loss is determined according to the distance between the power consumption terminal and a default energy storage cabinet, and the default energy storage cabinet is a distributed energy storage cabinet corresponding to the power consumption terminal; each of the distributed energy storage cabinets forms a direct connection relationship with at least one of the distributed energy storage cabinets; Acquire the power storage amount of the default energy storage cabinet, calculate a first transmittable power amount according to the power storage amount, and determine whether the first transmittable power amount meets the first power transmission demand; If not, constructing a power transmission sequence according to the first transmittable power amount, and determining a second power transmission demand; updating the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence, and transmitting power to the power user terminal according to the final power transmission sequence; The step of constructing a power transmission sequence according to the first transmittable power amount and determining a second power transmission demand includes: If the first transmittable power is zero, the power transmission sequence is an empty sequence, and the second power transmission demand is determined according to the first power transmission demand; If the first transmittable power is not zero, the power transmission sequence is configured according to the first transmittable power and the default energy storage cabinet, and the second power transmission demand is determined according to the first power transmission demand and the first transmittable power; The second power transmission demand is determined according to the first power transmission demand and the first transmittable power, including: According to the default energy storage cabinet, determine the directly connected energy storage cabinet corresponding to each default energy storage cabinet; Obtaining a second transmission loss corresponding to the distance between the direct-connected energy storage cabinet and the power terminal; The second power transmission demand is obtained according to the second transmission loss, the first transmittable amount of power and the first power transmission demand.

2. A distributed energy storage cabinet output control method for power grid response demand according to claim 1, characterized in that: Updating the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence includes: Execute a first iterative operation, the first iterative operation including: determining whether the directly-connected energy storage cabinet can meet the second power transmission demand; if not, updating the directly-connected energy storage cabinet and the second power transmission demand; repeating the first iterative operation until the current directly-connected energy storage cabinet meets the current second power transmission demand; and outputting the current power transmission sequence as the final power transmission sequence.

3. A distributed energy storage cabinet output control method for grid response demand according to claim 2, characterized in that: The determining whether the directly connected energy storage cabinet can meet the second power transmission demand includes: According to the distance between the direct-connected energy storage cabinet and the default energy storage cabinet, the direct-connected energy storage cabinets are sorted in ascending order to obtain a queuing sequence; Execute a second iterative operation, wherein the second iterative operation includes obtaining the current storage capacity of the first directly-connected energy storage cabinet, and obtaining the corresponding second transmittable capacity according to the storage capacity of the first directly-connected energy storage cabinet, determining whether the second transmittable capacity is zero, and if not, updating the transmission sequence according to the second transmittable capacity and the first directly-connected energy storage cabinet, determining whether the second transmittable capacity meets the second transmission demand, and if not, updating the second transmission demand and the queuing sequence, and repeating the second iterative operation until a preset termination condition is met, and the first directly-connected energy storage cabinet is the directly-connected energy storage cabinet at the head of the queuing sequence; According to the satisfied termination condition, it is determined whether the directly connected energy storage cabinet can meet the second power transmission demand.

4. A distributed energy storage cabinet output control method for power grid response demand according to claim 2, characterized in that: If there are multiple directly connected energy storage cabinets, updating the directly connected energy storage cabinets includes: According to each of the directly connected energy storage cabinets, determining an extended energy storage cabinet corresponding to each of the directly connected energy storage cabinets; Determine a second direct-connected energy storage cabinet according to the extended energy storage cabinet corresponding to each direct-connected energy storage cabinet, wherein the second direct-connected energy storage cabinet is the direct-connected energy storage cabinet with the largest number of corresponding extended energy storage cabinets; The directly connected energy storage cabinet is updated to an extended energy storage cabinet corresponding to the second directly connected energy storage cabinet.

5. A distributed energy storage cabinet output control method for power grid response demand according to claim 4, characterized in that: The updating of the second power transmission requirement comprises: Calculate a third transmission loss according to the distance between the extended energy storage cabinet corresponding to the second directly-connected energy storage cabinet and the power terminal; The second power transmission demand is updated according to the third transmission loss.

6. A distributed energy storage cabinet output control method for grid response demand according to claim 1, characterized in that: According to the default energy storage cabinet, determining the directly connected energy storage cabinet corresponding to each default energy storage cabinet includes: Using the distributed energy storage cabinet that is closest to the default energy storage cabinet as the directly connected energy storage cabinet; Alternatively, the distributed energy storage cabinet whose distance from the default energy storage cabinet is within a preset range is used as the directly connected energy storage cabinet.

7. A distributed energy storage cabinet output control method for grid response demand according to claim 6, characterized in that: The second transmission loss is determined according to resistance loss, capacitance loss and inductance loss during power transmission.

8. A distributed energy storage cabinet output control system for power grid response demand, characterized in that: include: An acquisition module is provided, which determines a power transmission terminal according to a power grid instruction and acquires a first power transmission demand, wherein the first power transmission demand is determined according to a power transmission demand of a power consumption terminal and a first transmission loss, wherein the first transmission loss is determined according to a distance between the power consumption terminal and a default energy storage cabinet, wherein the default energy storage cabinet is a distributed energy storage cabinet corresponding to the power consumption terminal; each of the distributed energy storage cabinets forms a direct connection relationship with a plurality of the distributed energy storage cabinets; A judgment module, which obtains the storage capacity of the default energy storage cabinet, calculates a first transmittable power according to the storage capacity, and judges whether the first transmittable power meets the first power transmission demand; a determination module, if not, constructing a power transmission sequence according to the first transmittable power quantity, and determining a second power transmission requirement; The step of constructing a power transmission sequence according to the first transmittable power amount and determining a second power transmission demand includes: If the first transmittable power is zero, the power transmission sequence is an empty sequence, and the second power transmission demand is determined according to the first power transmission demand; If the first transmittable power is not zero, the power transmission sequence is configured according to the first transmittable power and the default energy storage cabinet, and the second power transmission demand is determined according to the first power transmission demand and the first transmittable power; The second power transmission demand is determined according to the first power transmission demand and the first transmittable power, including: According to the default energy storage cabinet, determine the directly connected energy storage cabinet corresponding to each default energy storage cabinet; Obtaining a second transmission loss corresponding to the distance between the direct-connected energy storage cabinet and the power terminal; obtaining the second power transmission demand according to the second transmission loss, the first transmittable amount of electricity, and the first power transmission demand; An updating module updates the power transmission sequence according to the second power transmission demand to obtain a final power transmission sequence, and transmits power to the power user terminal according to the final power transmission sequence.

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