A power distribution method and system for energy storage converter

Abstract

The present invention provides a power distribution method and system for an energy storage converter, which belongs to the technical field of power supply devices, and specifically comprises: determining an alternative scheduling scheme according to a reliable discharge power range of a target converter and an energy storage regulation demand of an energy storage device, determining a priority scheduling scheme among the alternative scheduling schemes based on the number of target converters of different alternative scheduling schemes and the deviation of the remaining capacity of corresponding energy storage batteries between target converters, determining the balance of the remaining capacity of corresponding energy storage batteries between different energy storage converters after adjusting the energy storage regulation demand by using different discharge powers, and determining power distribution results of different target converters according to the balance and the reliable discharge power ranges of different target converters, thereby ensuring the reliability of energy storage regulation of the energy storage device.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply devices, and in particular relates to a power distribution method and system for an energy storage converter. Background Art

[0002] As the core equipment of the energy storage device, the most important function of the converter is to convert direct current into alternating current. At the same time, due to the power limitation of the power electronic components of the converter, in order to achieve the power distribution of the converter, the invention patent CN108988397A "A power distribution control method for parallel operation of energy storage converters" takes the minimum THD of the grid connection point as the goal, can accurately obtain the output power of each converter unit, and takes the output external characteristics of the converters when running in parallel as the control basis, providing technical support for the development of parallel energy storage converters. However, there were the following technical problems at that time:

[0003] The existing technical solutions ignore the power distribution of the energy storage inverter according to the energy storage regulation requirements. If the energy storage battery connected to the energy storage inverter cannot meet the energy storage regulation requirements due to insufficient remaining capacity, it will inevitably lead to frequent switching control of the energy storage inverter, making it difficult to meet the reliability of the final energy storage regulation requirements.

[0004] In order to solve the above technical problems, the present invention provides a method and system for distributing power of an energy storage converter. Summary of the invention

[0005] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, a power distribution method for an energy storage converter is provided.

[0007] A power distribution method for an energy storage converter, specifically comprising:

[0008] S1 determines the corresponding energy storage battery of the energy storage converter of the energy storage device and uses it as the corresponding energy storage battery, and determines the balanced energy storage converter in the energy storage converter according to the deviation of the remaining capacity between the corresponding energy storage batteries;

[0009] S2 determines the reliable discharge power range of the balanced energy storage converter and the target converter based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, and determines the alternative scheduling scheme according to the reliable discharge power range of the target converter and the energy storage regulation demand of the energy storage device;

[0010] S3 determines a priority scheduling scheme among the alternative scheduling schemes based on the number of target converters of different alternative scheduling schemes and the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters;

[0011] S4 determines the balance of the remaining capacity of the corresponding energy storage batteries between different energy storage inverters after using different discharge powers to adjust the energy storage regulation demand, and determines the power allocation results of different target inverters based on the balance and the reliable discharge power ranges of different target inverters.

[0012] A further technical solution is that the energy storage battery corresponding to the energy storage inverter is determined according to the connection relationship between the energy storage inverter and the energy storage battery.

[0013] A further technical solution is that the method for determining the alternative scheduling scheme is:

[0014] Based on the energy storage regulation requirement of the energy storage device and with the constraint that the sum of the reliable discharge power ranges of the target converter in the regulation scheme can meet the energy storage regulation requirement of the energy storage device, the alternative regulation scheme in the regulation scheme is determined.

[0015] A further technical solution is that the method for determining the priority scheduling scheme among the alternative scheduling schemes is:

[0016] Determining the scheduling processing difficulty of the alternative scheduling scheme based on the number of target converters of the alternative scheduling scheme;

[0017] Determine the deviation of the remaining capacity of the corresponding energy storage batteries between different target converters based on the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters of the alternative scheduling scheme, and use the deviation of the remaining capacity to determine the converter balancing coefficient of the alternative scheduling scheme;

[0018] The converter balancing coefficient and the scheduling processing difficulty are used to determine the comprehensive evaluation amount of the alternative scheduling schemes, and the priority scheduling scheme among the alternative scheduling schemes is determined based on the comprehensive evaluation amount.

[0019] A further technical solution is that the method for determining the power allocation result of the target converter is:

[0020] Determine the remaining capacity of the corresponding energy storage batteries of different target converters after the energy storage regulation demand is adjusted by using the allocated power of the target converter, and use it as the remaining capacity after adjustment;

[0021] Determine the residual capacity deviation between the energy storage converters according to the average value of the adjusted residual capacity of different target converters and the average value of the residual capacity of the corresponding energy storage batteries of other energy storage converters, and determine the adjusted balancing coefficient using the residual capacity deviation between the energy storage converters;

[0022] Determine the regulation reliability coefficient by using the deviation between the allocated power of different target converters and the end points of the reliable discharge power interval;

[0023] Determine the distribution processing reliability under the distribution power by using the weighted sum of the adjusted equalization coefficient and the adjusted reliability coefficient, and determine the power distribution results of different target converters by using the distribution processing reliability

[0024] A further technical solution is to use the allocated power corresponding to the maximum allocation processing reliability as the power allocation result of the target converter.

[0025] In a second aspect, the present application provides an energy storage converter power distribution system, which adopts the above-mentioned energy storage converter power distribution method, and specifically includes:

[0026] Converter classification module, scheduling scheme generation module, scheduling scheme screening module, power allocation module;

[0027] The converter classification module is responsible for determining the corresponding energy storage battery of the energy storage converter of the energy storage device, and using it as the corresponding energy storage battery, and determining the balanced energy storage converter in the energy storage converter according to the deviation of the remaining capacity between the corresponding energy storage batteries;

[0028] The scheduling scheme generation module is responsible for determining the reliable discharge power range of the balanced energy storage converter and the target converter based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, and determining the alternative scheduling scheme according to the reliable discharge power range of the target converter and the energy storage regulation demand of the energy storage device;

[0029] The scheduling scheme screening module is responsible for determining the priority scheduling scheme among the alternative scheduling schemes based on the number of target converters of different alternative scheduling schemes and the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters;

[0030] The power allocation module is responsible for determining the balance of the remaining capacity of the corresponding energy storage batteries between different energy storage inverters after adjusting the energy storage regulation demand using different discharge powers, and determining the power allocation results of different target inverters based on the balance and the reliable discharge power ranges of different target inverters.

[0031] The beneficial effects of the present invention are:

[0032] 1. In the present invention, the balanced energy storage converter in the energy storage converter is determined according to the deviation of the remaining capacity between the corresponding energy storage batteries, thereby avoiding the occurrence of technical problems such as the large deviation of the capacity between the corresponding energy storage batteries of the energy storage converter causing the regulation reliability of the energy storage converter to fail to meet the requirements, realizing the screening of balanced energy storage converters with relatively balanced capacity, and also laying the foundation for further utilizing balanced energy storage converters for energy storage regulation.

[0033] 2. In the present invention, the power allocation results of different target converters are determined according to the balance situation and the reliable discharge power range of different target converters. This not only takes into account the difference in the balance situation of the residual capacity between different energy storage converters after adjustment due to the use of different power allocation methods, thereby ensuring the balance situation of the energy storage converter after adjustment, but also ensures the reliability of the power allocation result and the stability of the energy storage adjustment by considering the reliable discharge power range of the target converter.

[0034] Other features and advantages will be described in the following description. The objects and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and drawings.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0037] Figure 1 It is a flow chart of a power distribution method for an energy storage converter;

[0038] Figure 2 is a flow chart of a method for determining a balanced energy storage converter in an energy storage converter;

[0039] Figure 3 It is a flow chart of a method for determining a reliable discharge power range of a balanced energy storage converter;

[0040] Figure 4 A flowchart of a method for determining a preferred scheduling solution among alternative scheduling solutions;

[0041] Figure 5 It is a framework diagram of a power distribution system of an energy storage converter. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0043] When distributing the power of the converter, if the energy storage battery connected to the energy storage converter cannot meet the demand of energy storage regulation due to insufficient remaining capacity, the energy storage converter needs to be frequently switched during the energy storage regulation process, making it difficult to meet the reliability requirements of the final energy storage regulation.

[0044] Balanced energy storage inverter: It is determined according to the deviation of the remaining capacity between the corresponding energy storage batteries of the energy storage inverter. Specifically, it is determined according to the proportion of corresponding energy storage batteries whose remaining capacity deviations between other corresponding energy storage batteries are greater than 10%. When the proportion is 0.2, the energy storage inverter whose proportion is less than 0.1 is used as the balanced energy storage inverter.

[0045] Alternative scheduling scheme: Determined based on the reliable discharge power range of the target converter and the energy storage regulation requirements of the energy storage device. Specifically, based on the energy storage regulation requirements of the energy storage device, and with the constraint that the sum of the reliable discharge power ranges of the target converter in the regulation scheme can meet the energy storage regulation requirements of the energy storage device, the alternative regulation scheme in the regulation scheme is determined.

[0046] Preferred scheduling scheme: Determine the deviation of the remaining capacity of the corresponding energy storage batteries between different target inverters based on the deviation of the remaining capacity of the corresponding energy storage batteries between the target inverters of the alternative scheduling scheme, and use the deviation of the remaining capacity to determine the inverter balancing coefficient of the alternative scheduling scheme, use the inverter balancing coefficient and the scheduling processing difficulty to determine the comprehensive evaluation amount of the alternative scheduling scheme, and determine the priority scheduling scheme among the alternative scheduling schemes based on the comprehensive evaluation amount.

[0047] Embodiment 1 To solve the above problem, according to one aspect of the present invention, Figure 1 As shown, a power distribution method for an energy storage converter is provided, which specifically includes:

[0048] S1 determines the corresponding energy storage battery of the energy storage converter of the energy storage device and uses it as the corresponding energy storage battery, and determines the balanced energy storage converter in the energy storage converter according to the deviation of the remaining capacity between the corresponding energy storage batteries;

[0049] Furthermore, the energy storage battery corresponding to the energy storage inverter is determined according to the connection relationship between the energy storage inverter and the energy storage battery.

[0050] It is understandable that if Figure 2 As shown, the method for determining the balanced energy storage converter in the energy storage converter is:

[0051] Determine the deviation of the remaining capacity between different corresponding energy storage batteries and other corresponding energy storage batteries according to the deviation of the remaining capacity between the corresponding energy storage batteries, and determine the capacity balancing coefficient of the different corresponding energy storage batteries by using the deviation;

[0052] Determine the capacity deviation energy storage battery based on the capacity balancing coefficients of different corresponding energy storage batteries, and determine the converter balancing coefficients of different energy storage converters according to the proportion of the capacity deviation energy storage battery in the corresponding energy storage batteries;

[0053] The determination of the balanced energy storage converter in the energy storage converter is performed by means of the converter balancing coefficient.

[0054] It should be noted that when the converter balancing coefficient of the energy storage converter is greater than a preset balancing coefficient, the energy storage converter is determined to be a balanced energy storage converter.

[0055] It should also be noted that the method for determining the balanced energy storage converter in the energy storage converter is:

[0056] S11 determines the deviation of the remaining capacity between different corresponding energy storage batteries and other corresponding energy storage batteries according to the deviation of the remaining capacity between the corresponding energy storage batteries, and determines the number of deviation energy storage batteries of the different corresponding energy storage batteries by using the deviation;

[0057] Optionally, the above step S11 includes the following steps:

[0058] S111 determines the deviation of the remaining capacity between different corresponding energy storage batteries and other corresponding energy storage batteries according to the deviation of the remaining capacity between the corresponding energy storage batteries, and judges whether there is a corresponding energy storage battery whose deviation of the remaining capacity with other corresponding energy storage batteries does not meet the requirement, if so, proceeds to the next step, if not, determines that the energy storage converter is a balanced energy storage converter;

[0059] S112: the corresponding energy storage battery whose residual capacity deviation from other corresponding energy storage batteries does not meet the requirement is used as a capacity deviation battery, and whether the number of the capacity deviation batteries meets the requirement is determined. If so, the next step is entered; if not, it is determined that the energy storage converter does not belong to a balanced energy storage converter;

[0060] S113: obtaining other corresponding energy storage batteries whose deviation from the remaining capacity of the capacity deviation battery does not meet the requirement, and using them as deviation energy storage batteries, and determining whether there are capacity deviation batteries whose number of deviation energy storage batteries does not meet the requirement, if yes, proceeding to step S12, if not, proceeding to the next step;

[0061] S114 determines the comprehensive capacity deviation of batteries with different capacity deviations according to the deviation of the remaining capacity with other corresponding energy storage batteries, and judges whether there is a capacity deviation battery whose comprehensive capacity deviation does not meet the requirements. If so, enters step S12; if not, it is determined that the energy storage inverter belongs to a balanced energy storage inverter.

[0062] S12 determines the capacity deviation coefficients of different corresponding energy storage batteries according to the number of the deviation energy storage batteries, determines the converter deviation coefficients of different energy storage converters by the average values ​​of the capacity deviation coefficients of different corresponding energy storage batteries, and determines the balanced energy storage converter in the energy storage converter by the converter deviation coefficient.

[0063] Furthermore, the discharge power curve of the corresponding energy storage battery is determined according to the analysis result of the historical discharge power data of the corresponding energy storage battery.

[0064] S2 determines the reliable discharge power range of the balanced energy storage converter and the target converter based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, and determines the alternative scheduling scheme according to the reliable discharge power range of the target converter and the energy storage regulation demand of the energy storage device;

[0065] S3 determines a priority scheduling scheme among the alternative scheduling schemes based on the number of target converters of different alternative scheduling schemes and the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters;

[0066] Specifically, Figure 3 As shown, the method for determining the reliable discharge power range of the balanced energy storage converter is:

[0067] Based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, the discharge power curves of different corresponding energy storage batteries at the remaining capacity are determined, and the stable discharge duration of different corresponding energy storage batteries in different discharge power intervals is determined through the discharge power curve at the remaining capacity;

[0068] Taking a preset time threshold as a constraint condition, determining a reliable interval in the discharge power interval of different corresponding energy storage batteries;

[0069] The reliable discharge power range of the balanced energy storage converter is determined according to the sum of the reliable power ranges of different corresponding energy storage batteries.

[0070] It can be understood that the reliable discharge power interval is a maximum discharge power interval in which the duration of stable discharge is greater than a preset duration threshold.

[0071] Further, when the interval width of the reliable discharge power interval of the balanced energy storage converter meets the requirement, the balanced energy storage converter is determined as the target converter.

[0072] In another embodiment, the method for determining the reliable discharge power range of the balanced energy storage converter is:

[0073] S21 determines the discharge power curves of different corresponding energy storage batteries at the remaining capacity based on the discharge power curves of the corresponding energy storage batteries of the balanced energy storage converter, and determines the stable discharge durations of different corresponding energy storage batteries in different discharge power intervals through the discharge power curves at the remaining capacity;

[0074] S22 determines the reliable intervals in the discharge power intervals of different corresponding energy storage batteries with the preset time threshold as a constraint condition, and determines whether there is a corresponding energy storage battery whose reliable interval width is less than the preset width. If so, proceed to the next step; if not, proceed to step S26;

[0075] S23: taking the corresponding energy storage battery whose interval width of the reliable interval is less than the preset width as the screening energy storage battery, judging whether the proportion of the corresponding energy storage battery of the screening energy storage battery in the balanced energy storage converter meets the requirement, if so, proceeding to the next step, if not, determining that the balanced energy storage converter does not belong to the target converter;

[0076] S24 determines the discharge stability coefficient of the screened energy storage battery based on the reliable interval of the screened energy storage battery and the duration of stable discharge in the reliable interval, and judges whether the number of screened energy storage batteries whose discharge stability coefficients do not meet the requirements meets the requirements, if so, proceeds to the next step, if not, determines that the balanced energy storage converter does not belong to the target converter;

[0077] S25 obtains the number of the screened energy storage batteries and the proportion of the corresponding energy storage batteries in the balanced energy storage converter, and determines the stability deviation of the balanced energy storage converter in combination with the discharge stability coefficients of different screened energy storage batteries, and judges whether the stability deviation of the balanced energy storage converter meets the requirements. If so, proceeds to the next step; if not, determines that the balanced energy storage converter does not belong to the target converter;

[0078] S26 determines the reliable discharge power range of the balanced energy storage converter according to the sum of the reliable power ranges of different corresponding energy storage batteries.

[0079] Specifically, it can be understood that the method for determining the alternative scheduling scheme is:

[0080] Based on the energy storage regulation requirement of the energy storage device and with the constraint that the sum of the reliable discharge power ranges of the target converter in the regulation scheme can meet the energy storage regulation requirement of the energy storage device, the alternative regulation scheme in the regulation scheme is determined.

[0081] Specifically, it is understandable that Figure 4 As shown, the method for determining the priority scheduling scheme among the alternative scheduling schemes is:

[0082] S31 determines the scheduling processing difficulty of the alternative scheduling scheme based on the number of target converters of the alternative scheduling scheme;

[0083] S32 determines the deviation of the remaining capacity of the corresponding energy storage batteries between different target converters based on the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters of the alternative scheduling scheme, and determines the converter balancing coefficient of the alternative scheduling scheme using the deviation of the remaining capacity;

[0084] S33 uses the converter balancing coefficient and the scheduling processing difficulty to determine the comprehensive evaluation amount of the alternative scheduling schemes, and determines the priority scheduling scheme among the alternative scheduling schemes based on the comprehensive evaluation amount.

[0085] Optionally, after obtaining the scheduling processing scheme of the alternative scheduling scheme, the priority scheduling scheme in the alternative scheduling scheme may be determined by the following technical scheme, specifically:

[0086] S321: obtaining the average remaining capacity of the energy storage batteries corresponding to different target converters, and using it as the corresponding remaining capacity, and determining the capacity deviation converter in the target converter by using the deviation of the corresponding remaining capacity;

[0087] S322 determines a deviation correction factor based on the proportion of the number of the capacity deviation converters to the number of target converters in the alternative scheduling scheme;

[0088] S323 determines the comprehensive evaluation amount of the alternative scheduling schemes according to the product of the deviation correction factor and the scheduling processing difficulty, and determines the priority scheduling scheme among the alternative scheduling schemes according to the comprehensive evaluation amount.

[0089] Optionally, before entering step S321, the following steps are included:

[0090] The scheduling processing difficulty of the alternative scheduling scheme is determined based on the number of target converters of the alternative scheduling scheme, and it is judged whether the scheduling processing difficulty of the alternative scheduling scheme meets the requirements. If so, the process goes to step S321; if not, it is determined that the alternative scheduling scheme does not belong to the preferred scheduling scheme.

[0091] Optionally, the above step S321 includes the following contents:

[0092] S3211 obtains the average remaining capacity of the energy storage batteries corresponding to different target converters, and uses it as the corresponding remaining capacity, and determines whether the average value of the deviation of the average remaining capacity of the corresponding energy storage batteries between different target converters meets the requirements, if so, proceeds to the next step, if not, determines that the alternative scheduling scheme does not belong to the preferred scheduling scheme;

[0093] S3212 determines whether there is a capacity deviation converter in the target converter by using the deviation amount corresponding to the remaining capacity, if yes, proceeds to the next step, if no, proceeds to step S322;

[0094] S3213 obtains the number of the capacity deviation converters and the corresponding residual capacity deviations between different capacity deviation converters and other target converters, and determines the capacity deviation factors of different capacity deviation converters in combination with the number of the capacity deviation converters and the number of target converters in the alternative scheduling scheme, and determines whether there is a capacity deviation converter whose capacity deviation factor does not meet the requirements. If not, proceed to the next step. If so, determine that the alternative scheduling scheme does not belong to the preferred scheduling scheme;

[0095] S3214 determines whether the sum of the capacity deviation factors of the capacity deviation converter meets the requirements. If so, proceed to the next step. If not, determine that the alternative scheduling scheme does not belong to the preferred scheduling scheme.

[0096] Optionally, the above step S322 may also be:

[0097] The deviation correction factor is determined based on the deviation of the average remaining capacity of the corresponding energy storage batteries between different target converters.

[0098] Furthermore, the priority scheduling scheme is the alternative scheduling scheme with the largest comprehensive evaluation value.

[0099] S4 determines the balance of the remaining capacity of the corresponding energy storage batteries between different energy storage inverters after using different discharge powers to adjust the energy storage regulation demand, and determines the power allocation results of different target inverters based on the balance and the reliable discharge power ranges of different target inverters.

[0100] Specifically, the method for determining the power allocation result of the target converter is:

[0101] Determine the remaining capacity of the corresponding energy storage batteries of different target converters after the energy storage regulation demand is adjusted by using the allocated power of the target converter, and use it as the remaining capacity after adjustment;

[0102] Determine the residual capacity deviation between the energy storage converters according to the average value of the adjusted residual capacity of different target converters and the average value of the residual capacity of the corresponding energy storage batteries of other energy storage converters, and determine the adjusted balancing coefficient using the residual capacity deviation between the energy storage converters;

[0103] Determine the regulation reliability coefficient by using the deviation between the allocated power of different target converters and the end points of the reliable discharge power interval;

[0104] Determine the distribution processing reliability under the distribution power by using the weighted sum of the adjusted equalization coefficient and the adjusted reliability coefficient, and determine the power distribution results of different target converters by using the distribution processing reliability

[0105] Furthermore, the allocated power corresponding to the maximum allocation processing reliability is used as the power allocation result of the target converter.

[0106] Embodiment 2 In the second aspect, as Figure 5 As shown, the present application provides an energy storage converter power distribution system, which adopts the above-mentioned energy storage converter power distribution method, specifically comprising:

[0107] Converter classification module, scheduling scheme generation module, scheduling scheme screening module, power allocation module;

[0108] The converter classification module is responsible for determining the corresponding energy storage battery of the energy storage converter of the energy storage device, and using it as the corresponding energy storage battery, and determining the balanced energy storage converter in the energy storage converter according to the deviation of the remaining capacity between the corresponding energy storage batteries;

[0109] The scheduling scheme generation module is responsible for determining the reliable discharge power range of the balanced energy storage converter and the target converter based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, and determining the alternative scheduling scheme according to the reliable discharge power range of the target converter and the energy storage regulation demand of the energy storage device;

[0110] The scheduling scheme screening module is responsible for determining the priority scheduling scheme among the alternative scheduling schemes based on the number of target converters of different alternative scheduling schemes and the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters;

[0111] The power allocation module is responsible for determining the balance of the remaining capacity of the corresponding energy storage batteries between different energy storage inverters after adjusting the energy storage regulation demand using different discharge powers, and determining the power allocation results of different target inverters based on the balance and the reliable discharge power ranges of different target inverters.

[0112] Based on the above embodiments, the present invention achieves the following beneficial effects:

[0113] 1. In the present invention, the balanced energy storage converter in the energy storage converter is determined according to the deviation of the remaining capacity between the corresponding energy storage batteries, thereby avoiding the occurrence of technical problems such as the large deviation of the capacity between the corresponding energy storage batteries of the energy storage converter causing the regulation reliability of the energy storage converter to fail to meet the requirements, realizing the screening of balanced energy storage converters with relatively balanced capacity, and also laying the foundation for further utilizing balanced energy storage converters for energy storage regulation.

[0114] 2. In the present invention, the power allocation results of different target converters are determined according to the balance situation and the reliable discharge power range of different target converters. This not only takes into account the difference in the balance situation of the residual capacity between different energy storage converters after adjustment due to the use of different power allocation methods, thereby ensuring the balance situation of the energy storage converter after adjustment, but also ensures the reliability of the power allocation result and the stability of the energy storage adjustment by considering the reliable discharge power range of the target converter.

[0115] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0116] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0117] The above description is only one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, one or more embodiments of this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included in the scope of the claims of this specification.

Claims

1. A power distribution method for an energy storage converter, characterized in that: Specifically include: Determine the energy storage battery corresponding to the energy storage converter of the energy storage device and use it as the corresponding energy storage battery, and determine the balanced energy storage converter in the energy storage converter according to the deviation of the remaining capacity between the corresponding energy storage batteries; Based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, determine the reliable discharge power range of the balanced energy storage converter and the target converter, and determine the alternative scheduling scheme according to the reliable discharge power range of the target converter and the energy storage regulation demand of the energy storage device; Determine a priority scheduling scheme among the alternative scheduling schemes based on the number of target converters of different alternative scheduling schemes and the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters; Determine the balance of the remaining capacity of the corresponding energy storage batteries between different energy storage converters after using different discharge powers to adjust the energy storage regulation demand, and determine the power allocation results of different target converters according to the balance and the reliable discharge power ranges of different target converters; The method for determining the balanced energy storage converter in the energy storage converter is: Determine the deviation of the remaining capacity between different corresponding energy storage batteries and other corresponding energy storage batteries according to the deviation of the remaining capacity between the corresponding energy storage batteries, and determine the capacity balancing coefficient of the different corresponding energy storage batteries by using the deviation; Determine the capacity deviation energy storage battery based on the capacity balancing coefficients of different corresponding energy storage batteries, and determine the converter balancing coefficients of different energy storage converters according to the proportion of the capacity deviation energy storage battery in the corresponding energy storage batteries; Determining the balanced energy storage converter in the energy storage converter by using the converter balancing coefficient; The method for determining the reliable discharge power range of the balanced energy storage converter is: Based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, the discharge power curves of different corresponding energy storage batteries at the remaining capacity are determined, and the stable discharge duration of different corresponding energy storage batteries in different discharge power intervals is determined through the discharge power curve at the remaining capacity; Taking a preset time threshold as a constraint condition, determining a reliable interval in the discharge power interval of different corresponding energy storage batteries; The reliable discharge power interval of the balanced energy storage converter is determined according to the sum of the reliability intervals of different corresponding energy storage batteries.

2. The energy storage converter power distribution method according to claim 1, characterized in that: The energy storage battery corresponding to the energy storage converter is determined according to the connection relationship between the energy storage converter and the energy storage battery.

3. The energy storage converter power distribution method according to claim 1, characterized in that: When the converter balancing coefficient of the energy storage converter is greater than a preset balancing coefficient, the energy storage converter is determined to be a balanced energy storage converter.

4. The energy storage converter power distribution method according to claim 1, characterized in that: The discharge power curve of the corresponding energy storage battery is determined according to the analysis result of the historical discharge power data of the corresponding energy storage battery.

5. The energy storage converter power distribution method according to claim 1, characterized in that: The reliable interval is a maximum discharge power interval in which the duration of stable discharge is greater than a preset duration threshold.

6. The energy storage converter power distribution method according to claim 1, characterized in that: The method for determining the alternative scheduling scheme is: Based on the energy storage regulation requirement of the energy storage device and with the constraint that the sum of the reliable discharge power ranges of the target converter in the regulation scheme can meet the energy storage regulation requirement of the energy storage device, the alternative regulation scheme in the regulation scheme is determined.

7. The energy storage converter power distribution method according to claim 1, characterized in that: The method for determining the priority scheduling scheme among the alternative scheduling schemes is: Determining the scheduling processing difficulty of the alternative scheduling scheme based on the number of target converters of the alternative scheduling scheme; Determine the deviation of the remaining capacity of the corresponding energy storage batteries between different target converters based on the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters of the alternative scheduling scheme, and use the deviation of the remaining capacity to determine the converter balancing coefficient of the alternative scheduling scheme; The converter balancing coefficient and the scheduling processing difficulty are used to determine the comprehensive evaluation amount of the alternative scheduling schemes, and the priority scheduling scheme among the alternative scheduling schemes is determined based on the comprehensive evaluation amount.

8. An energy storage converter power distribution system, using an energy storage converter power distribution method according to any one of claims 1 to 7, characterized in that: Specifically include: Converter classification module, scheduling scheme generation module, scheduling scheme screening module, power allocation module; The converter classification module is responsible for determining the corresponding energy storage battery of the energy storage converter of the energy storage device, and using it as the corresponding energy storage battery, and determining the balanced energy storage converter in the energy storage converter according to the deviation of the remaining capacity between the corresponding energy storage batteries; The scheduling scheme generation module is responsible for determining the reliable discharge power range of the balanced energy storage converter and the target converter based on the discharge power curve of the corresponding energy storage battery of the balanced energy storage converter, and determining the alternative scheduling scheme according to the reliable discharge power range of the target converter and the energy storage regulation demand of the energy storage device; The scheduling scheme screening module is responsible for determining the priority scheduling scheme among the alternative scheduling schemes based on the number of target converters of different alternative scheduling schemes and the deviation of the remaining capacity of the corresponding energy storage batteries between the target converters; The power allocation module is responsible for determining the balance of the remaining capacity of the corresponding energy storage batteries between different energy storage inverters after adjusting the energy storage regulation demand using different discharge powers, and determining the power allocation results of different target inverters based on the balance and the reliable discharge power ranges of different target inverters.

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