A method, apparatus, device, and storage medium for dynamically power-limited energy storage power regulation.

Abstract

This invention discloses a method, apparatus, device, and storage medium for dynamically power-limited energy storage power regulation. The method includes: acquiring battery performance parameters and the total amount of power to be allocated; calculating the energy parameters of each battery; calculating the allocated power of each battery based on the energy parameters of each battery and the total amount of power to be allocated; performing power correction on the calculated allocated power of each battery to obtain the corrected allocated power of each battery; and allocating the unallocated power due to the power correction to batteries that have not reached the power limit to obtain the allocated power of each battery after secondary allocation. This invention differentiates and regulates different types of batteries, which can extend the battery's lifespan.

Description

Technical Field

[0001] This invention relates to a method, apparatus, equipment, and storage medium for dynamically power-limited energy storage power regulation, belonging to the field of new energy control technology. Background Technology

[0002] The proportion of new energy power generation is increasing year by year. Due to the intermittent and random nature of new energy power generation, electrochemical energy storage has also developed rapidly.

[0003] Currently, energy storage power stations simply adjust the power of energy storage converters based on State of Charge (SOC), allocating power among multiple converters according to SOC to achieve more discharge for converters with higher SOC and more charging for converters with lower SOC. This approach fails to consider the different battery types and DOD (Device Optimization) associated with different energy storage converters. Simply allocating power based on SOC can negatively impact battery lifespan. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method, apparatus, device, and storage medium for dynamically power-limited energy storage power regulation, which can differentiate and regulate different types of batteries, thereby extending battery life. To achieve the above objective, this invention employs the following technical solution:

[0005] In a first aspect, the present invention provides a method for dynamically power-limited energy storage power regulation, comprising:

[0006] Obtain the battery SOC parameters, DOD parameters, and the total amount of power to be allocated;

[0007] Based on the battery SOC parameters and DOD parameters, the energy parameters of each battery are calculated; wherein, the energy parameters of the battery include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value, and the current energy value;

[0008] Based on the energy parameters of each battery and the total amount of power to be allocated, the allocated power of each battery is calculated.

[0009] The power allocation of each battery is corrected based on the battery SOC parameters to obtain the corrected power allocation of each battery.

[0010] The unallocated power due to power correction is allocated to the batteries that have not reached their power limits, resulting in the allocated power for each battery after secondary allocation.

[0011] In conjunction with the first aspect, the upper limit and lower limit of the SOC technology are further set according to the DOD parameters;

[0012] When the battery's SOC exceeds the technical limit, the battery will no longer be charged.

[0013] When the battery's state of charge (SOC) is below the technical lower limit, the battery will no longer discharge.

[0014] In conjunction with the first aspect, the relative SOC value, relative energy value, and current energy value are further calculated using the following formula:

[0015]

[0016] In equation (1), AvaSoc is the relative SOC value, and Soc is the obtained battery SOC parameter. down This is the lower limit of SOC technology. up This represents the upper limit of SOC technology; AvaEnergy is the relative energy value, E n The rated energy of the battery; CurEnergy is the energy value for the current period.

[0017] In conjunction with the first aspect, further, when there are n energy storage converters and the total power to be allocated is P fp The power allocated to each battery is P. cl Calculated using the following formula:

[0018]

[0019] In equation (2), t is the agreed time, and AvaSumSoc is the average SOC after the agreed time has arrived, calculated by the following formula:

[0020]

[0021] In equation (3), t is the agreed time.

[0022] In conjunction with the first aspect, the corrected power allocation for each battery is further as follows:

[0023] When the obtained battery SOC parameter Soc is less than the SOC technical upper limit Soc up The charging power is corrected to P. cd =min(P cl ,P n ,P maxcd ), where P cl Power allocation for each battery, P n P is the rated power of the battery. maxcd This is the maximum charging power;

[0024] When the obtained battery SOC parameter Soc is greater than or equal to the upper limit of SOC technology, up The charging power is corrected to P. cd =0;

[0025] When the obtained battery SOC parameter Soc is greater than the technical lower limit of SOC Soc down The discharge power is corrected to P. fd =min(P cl ,P n ,P maxfd ), where P maxfd This represents the maximum discharge power.

[0026] When the obtained battery SOC parameter Soc is less than or equal to the lower limit of SOC technology Soc down The discharge power is corrected to P. fd =0.

[0027] In conjunction with the first aspect, it further includes:

[0028] After secondary distribution, the allocated power of each battery is sent to the corresponding energy storage converter, which then controls the charging and discharging of the battery.

[0029] In a second aspect, the present invention provides a dynamically power-limited energy storage power regulation device, comprising:

[0030] Acquisition module: used to acquire battery SOC parameters, DOD parameters, and the total amount of power to be allocated;

[0031] The first calculation module is used to calculate the energy parameters of each battery based on the battery SOC parameters and DOD parameters; wherein, the energy parameters of the battery include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value, and the current energy value;

[0032] The second calculation module is used to calculate the allocated power of each battery based on the energy parameters of each battery and the total amount of power to be allocated.

[0033] Correction module: Used to correct the power allocation of each battery based on the battery SOC parameters, and obtain the corrected power allocation of each battery;

[0034] Secondary allocation module: used to allocate the unallocated power caused by power correction to the batteries that have not reached the power limit, so as to obtain the allocated power of each battery after secondary allocation.

[0035] In conjunction with the second aspect, it further includes:

[0036] Power distribution module: Used to distribute the allocated power of each battery after secondary distribution to the corresponding energy storage converter, which then controls the charging and discharging of the battery.

[0037] Thirdly, the present invention provides a computer device, including a processor and a storage medium;

[0038] The storage medium is used to store instructions;

[0039] The processor is configured to operate according to the instructions to perform the steps of the method according to the first aspect.

[0040] Fourthly, this aspect provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in the first aspect.

[0041] Compared with the prior art, the beneficial effects achieved by the dynamic power limiting energy storage power regulation method, apparatus, device, and storage medium provided in the embodiments of the present invention include:

[0042] This invention obtains the battery's SOC parameters, DOD parameters, and the total amount of power to be allocated; based on the battery's SOC and DOD parameters, it calculates the energy parameters of each battery; wherein, the battery's energy parameters include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value, and the current energy value; based on the energy parameters of each battery and the total amount of power to be allocated, it calculates the allocated power for each battery; this invention allocates power according to the battery's SOC and DOD parameters during power adjustment, satisfying power output requirements while also considering battery lifespan; this invention treats different types of batteries differently, and while realizing the function of an energy storage power station, it utilizes power limits to achieve the goal of balancing battery lifespan and extending battery lifespan.

[0043] This invention performs power correction on the calculated power allocation of each battery based on the battery SOC parameter, resulting in the corrected power allocation for each battery. The unallocated power caused by the power correction is then allocated to the batteries that have not reached their power limits, resulting in the power allocation for each battery after a second allocation. This invention performs two rounds of correction before issuing the target power allocation value for each battery. This ensures that the relative SOC values ​​of each battery remain consistent, reducing the impact of a single energy storage converter or battery failure on the overall functionality of the energy storage power station. Attached Figure Description

[0044] Figure 1 This is a flowchart of a dynamic power-limited energy storage power regulation method provided in Embodiment 1 of the present invention;

[0045] Figure 2 This is a schematic diagram illustrating the relationship between cycle life and DOD of the same type of battery in a dynamic power-limited energy storage power regulation method provided in Embodiment 1 of the present invention.

[0046] Figure 3 This is a schematic diagram of the upper limit and lower limit of SOC technology in a dynamic power-limited energy storage power regulation method provided in Embodiment 1 of the present invention;

[0047] Figure 4 This is a schematic diagram of the energy storage power regulation device provided in Embodiment 1 of the present invention. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0049] Example 1:

[0050] like Figure 1 As shown, a dynamic power-limited energy storage power regulation method includes:

[0051] Obtain the battery SOC parameters, DOD parameters, and the total amount of power to be allocated;

[0052] Based on the battery SOC parameters and DOD parameters, the energy parameters of each battery are calculated; wherein, the energy parameters of the battery include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value, and the current energy value;

[0053] Based on the energy parameters of each battery and the total amount of power to be allocated, the allocated power of each battery is calculated.

[0054] The power allocation of each battery is corrected based on the battery SOC parameters to obtain the corrected power allocation of each battery.

[0055] The unallocated power due to power correction is allocated to the batteries that have not reached their power limits, resulting in the allocated power for each battery after secondary allocation.

[0056] The specific steps are as follows:

[0057] Step 1: Obtain the battery SOC parameters, DOD parameters, and the total amount of power to be allocated.

[0058] like Figure 4 As shown, the energy storage power regulation device provides communication between GOOSE and n energy storage converters. These converters are connected to the battery and are used to control the charging and discharging of the battery. It also includes acquiring the battery's rated power P. n Battery rated energy E n Maximum charging power P maxcd Maximum discharge power P maxfd .

[0059] like Figure 2As shown, DOD represents the percentage of battery discharge capacity relative to the battery's rated capacity. For the same type of battery, the cycle life decreases as the depth of discharge increases. Considering both the depth of discharge and the number of cycles, recommended DOD parameters are available for each type of battery.

[0060] The direction from the reference bus to the line is considered positive; charging power is a positive value, and discharging power is a negative value. The maximum charging power of most batteries is less than their maximum discharging power.

[0061] The performance parameters of each energy storage converter and each battery are individually tuned.

[0062] Step 2: Calculate the energy parameters of each battery based on the battery SOC and DOD parameters.

[0063] The energy parameters of a battery include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value AvaEnergy, and the current energy value CurEnergy.

[0064] like Figure 3 As shown, different types of batteries have different DOD parameters, with common lead-acid batteries reaching 80% and lithium batteries reaching 100%. Due to the different DOD parameters, the upper and lower limits of the battery's SOC technology also differ.

[0065] The upper and lower limits of SOC technology are set according to the DOD parameters; when the battery SOC is greater than the upper limit, the battery will no longer be charged; when the battery SOC is less than the lower limit, the battery will no longer be discharged.

[0066] The relative SOC value, relative energy value, and current energy value are calculated using the following formula:

[0067]

[0068] In equation (1), AvaSoc is the relative SOC value, and Soc is the obtained battery SOC parameter. down This is the lower limit of SOC technology. up This represents the upper limit of SOC technology; AvaEnergy is the relative energy value, E n The rated energy of the battery; CurEnergy is the energy value for the current period.

[0069] Step 3: Calculate the allocated power for each battery based on the energy parameters of each battery and the total amount of power to be allocated.

[0070] Due to the different types of batteries and their varying degrees of DOD, in order to reduce the impact of a single energy storage converter or battery failure on the overall continuous power output capability of the energy storage converter, it is necessary to ensure that the relative SOC values ​​of each battery are consistent during power regulation.

[0071] The total amount of power to be allocated is P fp The power allocated to each battery is P. cl Calculated using the following formula:

[0072]

[0073] In equation (2), t is the agreed time, and AvaSumSoc is the average SOC after the agreed time has arrived, calculated by the following formula:

[0074]

[0075] In equation (3), t is the agreed time, which is generally taken as 15 min, 30 min or 1 hour.

[0076] Step 4: Based on the battery SOC parameters, perform power correction on the calculated power allocation of each battery to obtain the corrected power allocation of each battery.

[0077] When the obtained battery SOC parameter Soc is less than the SOC technical upper limit Soc up The charging power is corrected to P. cd =min(P cl ,P n ,P maxcd ), where P cl Power allocation for each battery, P n P is the rated power of the battery. maxcd This is the maximum charging power;

[0078] When the obtained battery SOC parameter Soc is greater than or equal to the upper limit of SOC technology, up The charging power is corrected to P. cd =0;

[0079] When the obtained battery SOC parameter Soc is greater than the technical lower limit of SOC Soc down The discharge power is corrected to P. fd =min(P cl ,P n ,P maxfd ), where P maxfd This represents the maximum discharge power.

[0080] When the obtained battery SOC parameter Soc is less than or equal to the lower limit of SOC technology Soc down The discharge power is corrected to P. fd =0.

[0081] Step 5: Allocate the unallocated power caused by power correction to the batteries that have not reached the power limit, and obtain the allocated power of each battery after secondary allocation.

[0082] Step 6: The allocated power of each battery after secondary distribution is sent to the corresponding energy storage converter, which then controls the charging and discharging of the battery.

[0083] Steps 1-6 constitute a dynamic power-limited energy storage power regulation. The dynamic power-limited energy storage power regulation device periodically repeats the above process.

[0084] This embodiment ensures that the relative SOC value of each battery remains consistent, reducing the impact of a single energy storage converter or battery failure on the overall functionality of the energy storage power station.

[0085] This embodiment treats different types of batteries differently. While realizing the function of an energy storage power station, it utilizes power limits to take into account the battery's lifespan, thereby extending the battery's lifespan.

[0086] Example 2:

[0087] This invention provides a dynamically power-limited energy storage power regulation device, comprising:

[0088] Acquisition module: used to acquire battery SOC parameters, DOD parameters, and the total amount of power to be allocated;

[0089] The first calculation module is used to calculate the energy parameters of each battery based on the battery SOC parameters and DOD parameters; wherein, the energy parameters of the battery include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value, and the current energy value;

[0090] The second calculation module is used to calculate the allocated power of each battery based on the energy parameters of each battery and the total amount of power to be allocated.

[0091] Correction module: Used to correct the power allocation of each battery based on the battery SOC parameters, and obtain the corrected power allocation of each battery;

[0092] Secondary allocation module: used to allocate the unallocated power caused by power correction to the batteries that have not reached the power limit, so as to obtain the allocated power of each battery after secondary allocation.

[0093] Power distribution module: Used to distribute the allocated power of each battery after secondary distribution to the corresponding energy storage converter, which then controls the charging and discharging of the battery.

[0094] Example 3:

[0095] This invention provides a computer device, including a processor and a storage medium;

[0096] The storage medium is used to store instructions;

[0097] The processor is configured to operate according to the instructions to execute the steps of the method described in Embodiment 1.

[0098] Example 4:

[0099] This invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the method described in Embodiment 1.

[0100] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0101] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0102] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0103] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0104] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for regulating energy storage power with dynamic power limitation, characterized in that, include: Obtain the battery SOC parameters, DOD parameters, and the total amount of power to be allocated; Based on the battery SOC and DOD parameters, the energy parameters of each battery are calculated; wherein, the battery energy parameters include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value, and the current energy value; wherein, the relative SOC value, the relative energy value, and the current energy value are calculated by the following formula: （1）， In equation (1), AvaSoc is the relative SOC value, and Soc is the obtained battery SOC parameter. down This is the lower limit of SOC technology, Soc up This represents the upper limit of SOC technology; AvaEnergy is the relative energy value, E n This represents the battery's rated energy; CurEnergy represents the current energy value. Based on the energy parameters of each battery and the total power to be allocated, the allocated power for each battery is calculated; when there are n energy storage converters, the total power to be allocated is P. fp The power allocated to each battery is P. cl Calculated using the following formula: （2）， In equation (2), t is the agreed time, and AvaSumSoc is the average SOC after the agreed time is reached, calculated by the following formula: （3）， In equation (3), t is the agreed time, and P fp The total power to be allocated; The power allocation of each battery is corrected based on the calculated SOC parameters to obtain the corrected power allocation of each battery; wherein, the corrected power allocation of each battery is: When the obtained battery SOC parameter Soc is less than the SOC technical upper limit Soc up The charging power is corrected to P. cd =min(P cl ,P n ,P maxcd ), where P cl Power allocation for each battery, P n P is the rated power of the battery. maxcd This is the maximum charging power; When the obtained battery SOC parameter Soc is greater than or equal to the upper limit of SOC technology, up The charging power is corrected to P. cd =0; When the obtained battery SOC parameter Soc is greater than the technical lower limit of SOC Soc down The discharge power is corrected to P. fd =min(P cl ,P n ,P maxfd ), where P maxfd This represents the maximum discharge power. When the obtained battery SOC parameter Soc is less than or equal to the lower limit of SOC technology Soc down The discharge power is corrected to P. fd =0; The unallocated power due to power correction is allocated to the batteries that have not reached their power limits, resulting in the allocated power for each battery after secondary allocation.

2. The method for regulating energy storage power with dynamic power limitation according to claim 1, characterized in that, The upper and lower limits of SOC technology are set according to the DOD parameters; When the battery's SOC exceeds the technical limit, the battery will no longer be charged. When the battery's state of charge (SOC) is below the technical lower limit, the battery will no longer discharge.

3. The method for regulating energy storage power with dynamic power limitation according to claim 1, characterized in that, Also includes: After secondary distribution, the allocated power of each battery is sent to the corresponding energy storage converter, which then controls the charging and discharging of the battery.

4. A dynamic power-limited energy storage power regulation device, used to execute the dynamic power-limited energy storage power regulation method according to claim 1, characterized in that, include: Acquisition module: used to acquire battery SOC parameters, DOD parameters, and the total amount of power to be allocated; The first calculation module is used to calculate the energy parameters of each battery based on the battery SOC parameters and DOD parameters; wherein, the energy parameters of the battery include the upper limit of SOC technology, the lower limit of SOC technology, the relative SOC value, the relative energy value, and the current energy value; The second calculation module is used to calculate the allocated power of each battery based on the energy parameters of each battery and the total amount of power to be allocated. Correction module: Used to correct the power allocation of each battery based on the battery SOC parameters, and obtain the corrected power allocation of each battery; Secondary allocation module: used to allocate the unallocated power caused by power correction to the batteries that have not reached the power limit, so as to obtain the allocated power of each battery after secondary allocation.

5. The energy storage power regulation device with dynamic power limiting according to claim 4, characterized in that, Also includes: Power distribution module: Used to distribute the allocated power of each battery after secondary distribution to the corresponding energy storage converter, which then controls the charging and discharging of the battery.

6. A computer device, characterized in that, Including processor and storage media; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to perform the steps of the method according to any one of claims 1 to 3.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method according to any one of claims 1 to 3.

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