CN115882554B - Management method and related device of energy storage system - Google Patents
Management method and related device of energy storage system Download PDFInfo
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Abstract
The embodiment of the application provides a management method and a related device of an energy storage system, wherein the energy storage system comprises a plurality of energy storage units, and the method comprises the following steps: acquiring operation parameters of a power system accessed by the energy storage system; if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system; determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages; and all the energy storage units to be maintained are charged and maintained, so that maintenance discrimination can be actively carried out and subsequent maintenance processing can be carried out, the condition of maintenance hysteresis is reduced, and the energy utilization rate is improved.
Description
Technical Field
The application relates to the technical field of energy storage management, in particular to a management method and a related device of an energy storage system.
Background
With the rapid development of the electronic industry, the battery energy storage plate which is related to the electronic industry is developed faster with the development of the electronic industry. In the energy storage system in the aspect of battery energy storage, the energy storage system can be a single energy storage system, and a certain number of energy storage units are connected in parallel to the system in order to meet the capacity expansion requirement of the energy storage system in the prior art. However, due to the difference of the delivery capacity, the internal resistance, the delivery time and the like of the battery, the voltages of the energy storage units cannot be completely consistent, and pressure difference exists among the energy storage units (the energy storage units and the like), even circulation exists due to overlarge pressure difference, so that the performance loss and the economic loss of the product are caused, and therefore, the pressure difference adjustment maintenance of the energy storage system is needed. In the prior art, pressure difference maintenance is generally carried out by manual intervention, and the time hysteresis caused by passive maintenance exists, so that the energy utilization rate of the system is reduced.
Disclosure of Invention
The embodiment of the application provides a management method and a related device of an energy storage system, which can pre-judge the charge maintenance of an energy storage unit through the operation parameters of the power system, and charge maintenance is carried out after the charge maintenance is judged to be needed, so that the charge maintenance judgment can be actively carried out, the subsequent maintenance treatment can be carried out, the condition of maintenance hysteresis is reduced, and the energy utilization rate is improved.
A first aspect of embodiments of the present application provides a method for managing an energy storage system, where the energy storage system includes a plurality of energy storage units, the method includes:
acquiring operation parameters of a power system accessed by the energy storage system;
if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system;
determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages;
and carrying out charging maintenance on all the energy storage units to be maintained.
In this example, the operation parameters of the power system accessed by the energy storage system are obtained; if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system; determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages; all the energy storage units to be maintained are charged and maintained, the energy storage units can be subjected to pre-judgment of charging and maintenance through the operation parameters of the power system, and the charging and maintenance can be performed after the charging and maintenance are judged to be required, so that the charging and maintenance judgment can be actively performed, the subsequent maintenance processing can be performed, the condition of maintenance hysteresis is reduced, and the energy utilization rate is improved.
In one possible implementation, the operating parameters of the power system include at least a power rate parameter of a region to which the energy storage system belongs and a load capacity of a transformer of the power system.
In one possible implementation manner, before the obtaining the open circuit voltages corresponding to the energy storage units in the energy storage system if the operation parameters of the power system meet the charge maintenance conditions of the energy storage system, the method further includes:
and if the electricity price parameter of the area to which the energy storage system belongs is in a low electricity price interval and the spare capacity exists in the load capacity of the transformer of the power system, determining that the operation parameter of the power system meets the charging maintenance condition of the energy storage system.
In one possible implementation manner, the determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open circuit voltages includes:
acquiring voltage differences among the open-circuit voltages of the energy storage units to obtain a first voltage difference set;
acquiring a first target voltage difference subset from the first voltage difference set, wherein elements in the first target voltage difference subset are all voltage differences higher than a preset voltage difference threshold in the first voltage difference set;
And determining an energy storage unit with a lower open-circuit voltage in the two energy storage units corresponding to the voltage differences respectively in the first target voltage difference subset as the energy storage unit to be maintained.
In one possible implementation manner, the obtaining the voltage differences between the open circuit voltages of the energy storage units to obtain a first voltage difference set includes:
determining a maximum open circuit voltage of the plurality of open circuit voltages;
and acquiring a voltage difference between the maximum open-circuit voltage and other open-circuit voltages except the maximum open-circuit voltage in the plurality of open-circuit voltages, and obtaining the first voltage difference set.
In one possible implementation manner, the performing charging maintenance on all the energy storage units to be maintained includes:
acquiring maintenance parameters corresponding to all the energy storage units to be maintained respectively;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the maintenance parameters.
In one possible implementation manner, the obtaining maintenance parameters corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained includes:
Determining a target voltage difference corresponding to the target energy storage unit to be maintained; the target energy storage unit to be maintained is any one of all the energy storage units to be maintained, and the target voltage difference is a voltage difference corresponding to the target energy storage unit to be maintained in the first target voltage difference subset;
determining a target difference value between the target voltage difference and the preset voltage difference threshold as a target maintenance voltage value corresponding to the target energy storage unit;
acquiring power adjustment information corresponding to the target maintenance voltage value, and determining the power adjustment information as the maintenance parameter corresponding to the target energy storage unit;
and repeatedly executing the determination processing of the target maintenance voltage value and the acquisition processing of the power adjustment information aiming at each energy storage unit to be maintained until maintenance parameters respectively corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained are obtained.
In one possible implementation manner, the charging process for each energy storage unit to be maintained according to the maintenance parameters includes:
acquiring current power information corresponding to each energy storage unit to be maintained respectively;
Determining target charging power respectively corresponding to each energy storage unit to be maintained according to the current power information and the power adjustment information respectively corresponding to each energy storage unit to be maintained;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the target charging power.
In one possible implementation, the method further includes:
sequencing the power adjustment information corresponding to each energy storage unit to be maintained respectively to obtain a power adjustment sequence table;
and charging the energy storage units to be maintained according to the power adjustment sequence table and the target charging power respectively corresponding to the energy storage units to be maintained.
In one possible implementation, the method further includes:
continuously acquiring operation parameters of an electric power system accessed by the energy storage system;
and stopping the charge maintenance of the energy storage system when the operation parameters of the power system do not meet the charge maintenance conditions of the energy storage system.
A second aspect of embodiments of the present application provides a management apparatus of an energy storage system, the energy storage system including a plurality of energy storage units, the apparatus including:
the first acquisition unit is used for acquiring the operation parameters of the power system accessed by the energy storage system;
The second acquisition unit is used for acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system;
a determining unit, configured to determine all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages;
and the maintenance unit is used for carrying out charging maintenance on all the energy storage units to be maintained.
In one possible implementation, the operating parameters of the power system include at least a power rate parameter of a region to which the energy storage system belongs and a load capacity of a transformer of the power system.
In one possible implementation manner, before the obtaining the open circuit voltages corresponding to the energy storage units in the energy storage system if the operation parameters of the power system meet the charge maintenance conditions of the energy storage system, the management device of the energy storage system is further configured to:
and if the electricity price parameter of the area to which the energy storage system belongs is in a low electricity price interval and the spare capacity exists in the load capacity of the transformer of the power system, determining that the operation parameter of the power system meets the charging maintenance condition of the energy storage system.
In a possible implementation, the determining unit is configured to:
acquiring voltage differences among the open-circuit voltages of the energy storage units to obtain a first voltage difference set;
acquiring a first target voltage difference subset from the first voltage difference set, wherein elements in the first target voltage difference subset are all voltage differences higher than a preset voltage difference threshold in the first voltage difference set;
and determining an energy storage unit with a lower open-circuit voltage in the two energy storage units corresponding to the voltage differences respectively in the first target voltage difference subset as the energy storage unit to be maintained.
In one possible implementation manner, in the acquiring the voltage differences between the open circuit voltages of the energy storage units, the determining unit is configured to:
determining a maximum open circuit voltage of the plurality of open circuit voltages;
and acquiring a voltage difference between the maximum open-circuit voltage and other open-circuit voltages except the maximum open-circuit voltage in the plurality of open-circuit voltages, and obtaining the first voltage difference set.
In one possible implementation, the maintenance unit is configured to:
Acquiring maintenance parameters corresponding to all the energy storage units to be maintained respectively;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the maintenance parameters.
In one possible implementation manner, in the acquiring maintenance parameters corresponding to each to-be-maintained energy storage unit in all to-be-maintained energy storage units, the maintenance unit is configured to:
determining a target voltage difference corresponding to the target energy storage unit to be maintained; the target energy storage unit to be maintained is any one of all the energy storage units to be maintained, and the target voltage difference is a voltage difference corresponding to the target energy storage unit to be maintained in the first target voltage difference subset;
determining a target difference value between the target voltage difference and the preset voltage difference threshold as a target maintenance voltage value corresponding to the target energy storage unit;
acquiring power adjustment information corresponding to the target maintenance voltage value, and determining the power adjustment information as the maintenance parameter corresponding to the target energy storage unit;
and repeatedly executing the determination processing of the target maintenance voltage value and the acquisition processing of the power adjustment information aiming at each energy storage unit to be maintained until maintenance parameters respectively corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained are obtained.
In one possible implementation manner, in terms of the charging process for each of the energy storage units to be maintained according to the maintenance parameters, the maintenance unit is configured to:
acquiring current power information corresponding to each energy storage unit to be maintained respectively;
determining target charging power respectively corresponding to each energy storage unit to be maintained according to the current power information and the power adjustment information respectively corresponding to each energy storage unit to be maintained;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the target charging power.
In one possible implementation, the management device of the energy storage system is further configured to:
sequencing the power adjustment information corresponding to each energy storage unit to be maintained respectively to obtain a power adjustment sequence table;
and charging the energy storage units to be maintained according to the power adjustment sequence table and the target charging power respectively corresponding to the energy storage units to be maintained.
In one possible implementation, the management device of the energy storage system is further configured to:
continuously acquiring operation parameters of an electric power system accessed by the energy storage system;
and stopping the charge maintenance of the energy storage system when the operation parameters of the power system do not meet the charge maintenance conditions of the energy storage system.
A third aspect of the embodiments of the present application provides a terminal, comprising a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory being interconnected, wherein the memory is configured to store a computer program, the computer program comprising program instructions, the processor being configured to invoke the program instructions to execute the step instructions as in the first aspect of the embodiments of the present application.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform part or all of the steps as described in the first aspect of the embodiments of the present application.
A fifth aspect of the embodiments of the present application provides a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps as described in the first aspect of the embodiments of the present application. The computer program product may be a software installation package.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an energy storage system according to an embodiment of the present application;
fig. 2 is a flow chart of a method for managing an energy storage system according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating another method for managing an energy storage system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a management device of an energy storage system according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.
In order to better understand the management method of the energy storage system provided in the embodiments of the present application, the following briefly describes an energy storage system to which the management method of the energy storage system is applied. Referring to fig. 1, fig. 1 is a schematic structural diagram of an energy storage system according to an embodiment of the present application. As shown in fig. 1, the energy storage system includes a plurality of energy storage units, where the plurality of energy storage units are connected in parallel, and can acquire an operation parameter of an electric power system to which the energy storage system is connected, and judge a maintenance state based on the operation parameter, when the state is judged to meet a charging maintenance condition, the energy storage unit to be maintained is determined according to an open-circuit voltage of the energy storage unit, corresponding maintenance information is acquired, and the energy storage unit is charged and maintained according to the maintenance information, so that the maintenance can be performed through the pre-judgment of the operation parameter, and the maintenance information is determined to perform maintenance after the maintenance is judged to be required, thereby being capable of actively performing maintenance judgment and performing subsequent maintenance processing, reducing the condition of maintenance lag, improving the energy utilization rate, and simultaneously, reducing the condition of overlarge end voltage difference, further reducing the occurrence of large circulation between the energy storage units, and improving the stability of the energy storage system.
Referring to fig. 2, fig. 2 is a flowchart of a method for managing an energy storage system according to an embodiment of the present application. As shown in fig. 2, the energy storage system includes a plurality of energy storage units, and the method for managing the energy storage system includes:
201. and acquiring the operation parameters of the power system accessed by the energy storage system.
The energy storage system may include a local controller that may be used to perform a method of managing the energy storage system, and the local controller may interact with an external battery management system (EMS) to obtain operating parameters of the power system, which may be, for example, a direction. The operation parameters at least comprise electricity price parameters of the region where the energy storage system belongs, load capacity of a transformer of the power system and the like, and the electricity price parameters can understand current electricity price information of the external region where the accessed power system is located. Different regions may have different electricity prices according to the polar season and different time periods of each day; the spare capacity can be the spare capacity of the transformer of the power system connected with the energy storage system, the energy storage system can be used as a load when the energy storage system is charged, and if the transformer is connected with other loads and reaches the rated capacity of the connected transformer at the moment, the energy storage system cannot be charged at the moment, so that the energy storage system can be charged only when the spare capacity exists in the connected transformer.
202. And if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system.
The determining that the operation parameter of the power system meets the charging maintenance condition of the energy storage system may specifically be: and if the electricity price parameter of the area to which the energy storage system belongs is in a low electricity price interval and the spare capacity exists in the load capacity of the transformer of the power system, determining that the operation parameter of the power system meets the charging maintenance condition of the energy storage system. The low electricity rate interval may be set by an empirical value or historical data.
The open circuit voltages corresponding to the energy storage units in the energy storage system can be obtained through a voltage detection sensor and the like, and can be obtained through other modes. The plurality of open circuit voltages corresponding to the plurality of energy storage cells may be understood as an open circuit voltage corresponding to each of the plurality of energy storage cells.
203. And determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages.
The first target voltage difference subset may be determined according to the voltage differences between the open circuit voltages and the preset voltage threshold, where the elements in the set are all the voltage differences higher than the preset voltage difference threshold in the first voltage difference set, and the energy storage unit with the lower open circuit voltage in the corresponding two energy storage units with all the voltage differences higher than the preset voltage difference threshold is determined as the energy storage unit to be maintained.
Because the charging maintenance is performed, the energy storage unit with lower open-circuit voltage in the two energy storage units is determined as the energy storage unit to be maintained, so that the charging maintenance of the energy storage unit can be realized.
204. And carrying out charging maintenance on all the energy storage units to be maintained.
The maintenance parameters corresponding to each energy storage unit to be maintained in the energy storage units to be maintained respectively can be obtained, and charging maintenance is carried out based on the maintenance parameters. And continuously acquiring the operation parameters of the power system accessed by the energy storage system after maintenance, and stopping charging maintenance of the energy storage system when the operation parameters of the power system do not meet the charging maintenance conditions of the energy storage system.
In this example, the operation parameters of the power system accessed by the energy storage system are obtained; if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system; determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages; all the energy storage units to be maintained are charged and maintained, the energy storage units can be subjected to pre-judgment of charging and maintenance through the operation parameters of the power system, and the charging and maintenance can be performed after the charging and maintenance are judged to be required, so that the charging and maintenance judgment can be actively performed, the subsequent maintenance processing can be performed, the condition of maintenance hysteresis is reduced, and the energy utilization rate is improved.
In one possible implementation manner, a possible method for determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open circuit voltages includes:
a1, obtaining voltage differences among the open-circuit voltages of the energy storage units to obtain a first voltage difference set;
a2, acquiring a first target voltage difference subset from the first voltage difference set, wherein elements in the first target voltage difference subset are all voltage differences higher than a preset voltage difference threshold value in the first voltage difference set;
a3, determining the energy storage units with lower open-circuit voltage in the two energy storage units corresponding to the voltage differences respectively as the energy storage units to be maintained in the first target voltage difference subset.
The maximum open-circuit voltage can be determined from the open-circuit voltages corresponding to the energy storage units, and the difference value operation is performed according to the maximum open-circuit voltage and the open-circuit voltage corresponding to the energy storage units to obtain a first voltage difference set. So that the first set of voltage differences can be quickly determined.
The preset voltage difference threshold is set through an empirical value or historical data, and the voltage difference in the first target voltage difference subset corresponds to two energy storage units, so that the energy storage unit with lower open-circuit voltage in the two energy storage units can be determined as the energy storage unit to be maintained due to charge maintenance, and the energy storage unit can be charged and maintained. Meanwhile, after the subsequent charge maintenance, the voltage difference in the first target voltage difference subset is smaller than a preset voltage difference threshold value, so that the condition of overlarge terminal voltage difference can be reduced, the occurrence of large circulation among the energy storage units is reduced, and the stability of the energy storage system is improved.
In one possible implementation manner, a possible method for obtaining voltage differences between the open circuit voltages of the energy storage units to obtain a first voltage difference set includes:
b1, determining the maximum open circuit voltage in the open circuit voltages;
and B2, acquiring the voltage difference between the maximum open circuit voltage and other open circuit voltages except the maximum open circuit voltage in the plurality of open circuit voltages, and obtaining the first voltage difference set.
By acquiring the maximum open-circuit voltage and determining a set formed by the maximum open-circuit voltage and the voltage differences between other open-circuit voltages in the plurality of open-circuit voltages as the first voltage difference set, compared with the process of acquiring all the voltage differences between the open-circuit voltages in the plurality of open-circuit voltages, the calculation amount during the voltage difference acquisition can be reduced, the voltage difference higher than the threshold value can be rapidly and accurately determined during the subsequent threshold value judgment, and the efficiency is improved.
In one possible implementation manner, a possible method for charging and maintaining all the energy storage units to be maintained includes:
c1, acquiring maintenance parameters corresponding to all the energy storage units to be maintained respectively;
And C2, respectively carrying out charging treatment on each energy storage unit to be maintained according to the maintenance parameters.
The maintenance parameters may be obtained by a difference between a voltage difference corresponding to the energy storage unit to be maintained and a preset voltage difference, so that the maintenance parameters corresponding to all the energy storage units to be maintained may be obtained. The maintenance parameter may be power adjustment information corresponding to the energy storage unit to be maintained, the power adjustment information being a parameter for adjusting the current power of the energy storage unit to be maintained. During maintenance, the current power information can be adjusted by adopting maintenance parameters, and the energy storage unit to be maintained is charged according to the adjusted power.
In one possible implementation manner, a possible method for obtaining maintenance parameters corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained respectively includes:
d1, determining a target voltage difference corresponding to the target energy storage unit to be maintained; the target energy storage unit to be maintained is any one of all the energy storage units to be maintained, and the target voltage difference is a voltage difference corresponding to the target energy storage unit to be maintained in the first target voltage difference subset;
D2, determining a target difference value between the target voltage difference and the preset voltage difference threshold as a target maintenance voltage value corresponding to the target energy storage unit;
d3, acquiring power adjustment information corresponding to the target maintenance voltage value, and determining the power adjustment information as the maintenance parameter corresponding to the target energy storage unit;
and D4, repeatedly executing the determination processing of the target maintenance voltage value and the acquisition processing of the power adjustment information aiming at each energy storage unit to be maintained until maintenance parameters corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained are obtained.
The larger the target maintenance voltage value is, the larger the adjustment strength corresponding to the power adjustment information is; the smaller the target maintenance voltage value is, the smaller the adjustment strength corresponding to the power adjustment information is. The magnitude of the adjusting force can be understood as the degree of improving the current power information, the greater the adjusting force is, the greater the degree of improving is, the smaller the adjusting force is, and the degree of improving is smaller, so that the charging power information corresponding to the energy storage unit to be maintained can be determined according to the power adjusting information and the current power information, and meanwhile, the energy waste during charging can be reduced and the overall efficiency is improved due to the adjustment of the power.
In one possible implementation manner, a possible method for respectively charging each energy storage unit to be maintained according to the maintenance parameters includes:
e1, obtaining current power information corresponding to each energy storage unit to be maintained respectively;
e2, determining target charging power corresponding to each energy storage unit to be maintained according to the current power information and the power adjustment information corresponding to each energy storage unit to be maintained;
and E3, respectively carrying out charging treatment on each energy storage unit to be maintained according to the target charging power.
The current power information corresponding to the energy storage unit to be maintained may be power information for charging the energy storage unit currently, and the information may be rated charging power, real-time charging power and the like corresponding to the energy storage unit to be maintained.
And determining the sum of the power corresponding to the current power information corresponding to the energy storage unit to be maintained and the adjustment power corresponding to the power adjustment information as the target charging power corresponding to the energy storage unit to be maintained. So that the corresponding energy storage unit can be charged by the target charging power.
The energy storage unit to be maintained and the subsequent energy storage unit to be maintained which are determined by the method are charged, so that the voltage difference between the maintained energy storage units is generally ensured to be smaller than the preset voltage difference threshold value, and the maintenance state of the energy storage system can be judged after a period of time is separated, thereby reducing the maintenance times and improving the system performance.
In one possible implementation manner, when the energy storage unit to be maintained is charged, the energy storage unit to be maintained is further sequenced through the size of the power adjustment information, and is charged according to the sequence of sequencing, specifically as follows:
f1, sequencing the power adjustment information respectively corresponding to the energy storage units to be maintained to obtain a power adjustment sequence table;
and F2, carrying out charging treatment on each energy storage unit to be maintained according to the power adjustment sequence table and the target charging power respectively corresponding to each energy storage unit to be maintained.
The method of sorting according to the power adjustment information to obtain the power adjustment sequence table may be sorting according to the size of the adjustment power corresponding to the power adjustment information, specifically, sorting according to a mode from large to small, so as to obtain the power adjustment sequence table.
The method for maintaining each energy storage unit to be maintained according to the power adjustment sequence table and the target charging power can be as follows: determining a maintenance sequence corresponding to each energy storage unit to be maintained according to the power adjustment sequence table, sequentially carrying out charging treatment on each energy storage unit to be maintained according to the maintenance sequence corresponding to the maintenance sequence and the corresponding target charging power, and carrying out independent charging treatment on the subsequent energy storage units to be maintained after the previous energy storage unit to be maintained is charged.
In one possible implementation manner, when the energy storage unit is charged and maintained, the maintenance and discrimination can be continuously performed on the energy storage system, and when the energy storage system is discriminated that the energy storage system does not meet the charging and maintenance condition, the charging and maintenance on the energy storage unit to be maintained is stopped, so that the accuracy of the charging and maintenance can be improved, and the method specifically comprises the following steps:
g1, continuously acquiring operation parameters of a power system accessed by the energy storage system;
and G2, stopping charging maintenance of the energy storage system when the operation parameters of the power system do not meet the charging maintenance conditions of the energy storage system.
The method for continuously acquiring the operation parameters of the power system accessed by the energy storage system can be as follows: and acquiring the operation parameters of the power system accessed by the energy storage system according to a preset time interval by a maintenance device of the energy storage unit to be maintained, wherein the preset time interval is set through an empirical value or historical data.
In a specific embodiment, a specific maintenance method of the energy storage system is further provided, which specifically includes the following steps:
the cabin energy storage system can not be completely consistent with the battery core, so that the energy storage units have different open-circuit voltage differences, and circulation is formed when the voltage differences are too large, so that the performance loss and the economic loss of the product are caused; the cabin energy storage system is provided with a local controller, the internal information flow of the whole energy storage unit is comprehensively planned, the cabin energy storage system is interacted with external EMS information, and the local controller collects relevant parameters of the battery system through the battery management system; the method comprises the steps of carrying out information interaction through an EMS to obtain charging maintenance parameters, determining a maintenance state according to the charging maintenance parameters, judging whether the charging maintenance is facilitated according to the maintenance state, carrying out open-circuit voltage acquisition calculation on all energy storage units which are connected in parallel in the energy storage system through a battery management system when the charging maintenance is facilitated, comparing the open-circuit voltage acquisition calculation with an internal preset differential pressure threshold value, judging whether the charging maintenance is required (when the differential pressure is larger than the preset differential pressure threshold value, carrying out charging maintenance), arranging the open-circuit voltages when the charging maintenance is required, and simultaneously requesting a Process Control System (PCS) to carry out independent power supplement on each energy storage unit which is required to be maintained in sequence by using proper power according to the current allowable power value until the open-circuit voltage difference value of all the energy storage units is smaller than the preset differential pressure threshold value or the EMS sends out the energy storage units which are not beneficial to the charging maintenance (namely, the charging maintenance condition is not met).
Referring to fig. 3, fig. 3 is a flowchart of a method for managing an energy storage system according to an embodiment of the present application. As shown in fig. 3, the energy storage system includes a plurality of energy storage units, and the method for managing the energy storage system includes:
301. acquiring operation parameters of a power system accessed by the energy storage system;
302. if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system;
303. determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages;
304. determining a target voltage difference corresponding to the target energy storage unit to be maintained; the target energy storage unit to be maintained is any one of all the energy storage units to be maintained, and the target voltage difference is a voltage difference corresponding to the target energy storage unit to be maintained in the first target voltage difference subset;
305. determining a target difference value between the target voltage difference and the preset voltage difference threshold as a target maintenance voltage value corresponding to the target energy storage unit;
306. acquiring power adjustment information corresponding to the target maintenance voltage value, and determining the power adjustment information as the maintenance parameter corresponding to the target energy storage unit;
307. Repeatedly executing the determination processing of the target maintenance voltage value and the acquisition processing of the power adjustment information aiming at each energy storage unit to be maintained until maintenance parameters corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained are obtained;
308. and respectively carrying out charging treatment on each energy storage unit to be maintained according to the maintenance parameters.
In this example, the charging power information corresponding to the energy storage unit to be maintained may be determined according to the power adjustment information and the current power information, and meanwhile, due to the adjustment of power, energy waste during charging may be reduced, and overall efficiency may be improved.
In accordance with the foregoing embodiments, referring to fig. 4, fig. 4 is a schematic structural diagram of a terminal provided in an embodiment of the present application, as shown in the fig. 4, including a processor, an input device, an output device, and a memory, where the processor, the input device, the output device, and the memory are connected to each other, and the memory is configured to store a computer program, where the computer program includes program instructions, and the processor is configured to invoke the program instructions, where the program includes instructions for performing the following steps;
Acquiring operation parameters of a power system accessed by the energy storage system;
if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system;
determining all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open-circuit voltages;
and carrying out charging maintenance on all the energy storage units to be maintained.
The foregoing description of the embodiments of the present application has been presented primarily in terms of a method-side implementation. It will be appreciated that, in order to achieve the above-mentioned functions, the terminal includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The embodiment of the application may divide the functional units of the terminal according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units may be implemented in hardware or in software functional units. It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice.
In accordance with the foregoing, referring to fig. 5, fig. 5 is a schematic structural diagram of a management device of an energy storage system according to an embodiment of the present application. As shown in fig. 5, the energy storage system includes a plurality of energy storage units, and the apparatus includes:
a first obtaining unit 501, configured to obtain an operation parameter of an electric power system to which the energy storage system is connected;
a second obtaining unit 502, configured to obtain a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system if the operation parameters of the power system meet the charge maintenance conditions of the energy storage system;
a determining unit 503, configured to determine all energy storage units to be maintained from the plurality of energy storage units according to the plurality of open circuit voltages;
And the maintenance unit 504 is configured to charge and maintain all the energy storage units to be maintained.
In one possible implementation, the operating parameters of the power system include at least a power rate parameter of a region to which the energy storage system belongs and a load capacity of a transformer of the power system.
In one possible implementation manner, before the obtaining the open circuit voltages corresponding to the energy storage units in the energy storage system if the operation parameters of the power system meet the charge maintenance conditions of the energy storage system, the management device of the energy storage system is further configured to:
and if the electricity price parameter of the area to which the energy storage system belongs is in a low electricity price interval and the spare capacity exists in the load capacity of the transformer of the power system, determining that the operation parameter of the power system meets the charging maintenance condition of the energy storage system.
In a possible implementation manner, the determining unit 503 is configured to:
acquiring voltage differences among the open-circuit voltages of the energy storage units to obtain a first voltage difference set;
acquiring a first target voltage difference subset from the first voltage difference set, wherein elements in the first target voltage difference subset are all voltage differences higher than a preset voltage difference threshold in the first voltage difference set;
And determining an energy storage unit with a lower open-circuit voltage in the two energy storage units corresponding to the voltage differences respectively in the first target voltage difference subset as the energy storage unit to be maintained.
In one possible implementation manner, in the acquiring the voltage differences between the open circuit voltages of the energy storage units, the determining unit 503 is configured to:
determining a maximum open circuit voltage of the plurality of open circuit voltages;
and acquiring a voltage difference between the maximum open-circuit voltage and other open-circuit voltages except the maximum open-circuit voltage in the plurality of open-circuit voltages, and obtaining the first voltage difference set.
In one possible implementation, the maintenance unit 504 is configured to:
acquiring maintenance parameters corresponding to all the energy storage units to be maintained respectively;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the maintenance parameters.
In one possible implementation manner, in the acquiring maintenance parameters corresponding to each of the to-be-maintained energy storage units in all to-be-maintained energy storage units, the maintenance unit 504 is configured to:
Determining a target voltage difference corresponding to the target energy storage unit to be maintained; the target energy storage unit to be maintained is any one of all the energy storage units to be maintained, and the target voltage difference is a voltage difference corresponding to the target energy storage unit to be maintained in the first target voltage difference subset;
determining a target difference value between the target voltage difference and the preset voltage difference threshold as a target maintenance voltage value corresponding to the target energy storage unit;
acquiring power adjustment information corresponding to the target maintenance voltage value, and determining the power adjustment information as the maintenance parameter corresponding to the target energy storage unit;
and repeatedly executing the determination processing of the target maintenance voltage value and the acquisition processing of the power adjustment information aiming at each energy storage unit to be maintained until maintenance parameters respectively corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained are obtained.
In one possible implementation manner, in terms of the charging process for each of the energy storage units to be maintained according to the maintenance parameter, the maintenance unit 504 is configured to:
acquiring current power information corresponding to each energy storage unit to be maintained respectively;
Determining target charging power respectively corresponding to each energy storage unit to be maintained according to the current power information and the power adjustment information respectively corresponding to each energy storage unit to be maintained;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the target charging power.
In one possible implementation, the management device of the energy storage system is further configured to:
sequencing the power adjustment information corresponding to each energy storage unit to be maintained respectively to obtain a power adjustment sequence table;
and charging the energy storage units to be maintained according to the power adjustment sequence table and the target charging power respectively corresponding to the energy storage units to be maintained.
In one possible implementation, the management device of the energy storage system is further configured to:
continuously acquiring operation parameters of an electric power system accessed by the energy storage system;
and stopping the charge maintenance of the energy storage system when the operation parameters of the power system do not meet the charge maintenance conditions of the energy storage system.
The embodiment of the application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program makes a computer execute part or all of the steps of the management method of any one of the energy storage systems described in the embodiment of the method.
Embodiments of the present application also provide a computer program product comprising a non-transitory computer-readable storage medium storing a computer program that causes a computer to perform some or all of the steps of a method of managing an energy storage system as any one of the method embodiments described above.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, such as the division of the units, merely a logical function division, and there may be additional manners of dividing the actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units described above may be implemented either in hardware or in software program modules.
The integrated units, if implemented in the form of software program modules, may be stored in a computer-readable memory for sale or use as a stand-alone product. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a memory, including several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory includes: a U-disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the above embodiments may be implemented by a program that instructs associated hardware, and the program may be stored in a computer readable memory, which may include: flash disk, read-only memory, random access memory, magnetic or optical disk, etc.
The foregoing has outlined rather broadly the more detailed description of embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (9)
1. A method of managing an energy storage system, the energy storage system comprising a plurality of energy storage units, the method comprising:
acquiring operation parameters of a power system accessed by the energy storage system;
if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system, acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system;
Determining a maximum open circuit voltage of the plurality of open circuit voltages;
acquiring a voltage difference between the maximum open circuit voltage and other open circuit voltages except the maximum open circuit voltage in the plurality of open circuit voltages to obtain a first voltage difference set;
acquiring a first target voltage difference subset from the first voltage difference set, wherein elements in the first target voltage difference subset are all voltage differences higher than a preset voltage difference threshold in the first voltage difference set;
determining an energy storage unit with a lower open-circuit voltage in two energy storage units corresponding to the voltage differences respectively in the first target voltage difference subset as an energy storage unit to be maintained;
determining a target voltage difference corresponding to the target energy storage unit to be maintained; the target energy storage unit to be maintained is any one of all the energy storage units to be maintained, and the target voltage difference is a voltage difference corresponding to the target energy storage unit to be maintained in the first target voltage difference subset;
determining a target difference value between the target voltage difference and the preset voltage difference threshold as a target maintenance voltage value corresponding to a target energy storage unit;
Acquiring power adjustment information corresponding to the target maintenance voltage value, and determining the power adjustment information as maintenance parameters corresponding to the target energy storage unit;
repeatedly executing the determination processing of the target maintenance voltage value and the acquisition processing of the power adjustment information aiming at each energy storage unit to be maintained until maintenance parameters corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained are obtained;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the maintenance parameters.
2. The method of claim 1, wherein the operating parameters of the power system include at least a price of electricity parameter of a region to which the energy storage system is attached and a load capacity of a transformer of the power system.
3. The method of claim 2, wherein before obtaining the plurality of open circuit voltages corresponding to the plurality of energy storage units in the energy storage system if the operating parameter of the power system satisfies the charge maintenance condition of the energy storage system, the method further comprises:
and if the electricity price parameter of the area to which the energy storage system belongs is in a low electricity price interval and the spare capacity exists in the load capacity of the transformer of the power system, determining that the operation parameter of the power system meets the charging maintenance condition of the energy storage system.
4. The method according to claim 1, wherein the charging each of the energy storage units to be maintained according to the maintenance parameters includes:
acquiring current power information corresponding to each energy storage unit to be maintained respectively;
determining target charging power respectively corresponding to each energy storage unit to be maintained according to the current power information and the power adjustment information respectively corresponding to each energy storage unit to be maintained;
and respectively carrying out charging treatment on each energy storage unit to be maintained according to the target charging power.
5. The method according to claim 4, wherein the method further comprises:
sequencing the power adjustment information corresponding to each energy storage unit to be maintained respectively to obtain a power adjustment sequence table;
and charging the energy storage units to be maintained according to the power adjustment sequence table and the target charging power respectively corresponding to the energy storage units to be maintained.
6. The method according to claim 1, wherein the method further comprises:
continuously acquiring operation parameters of an electric power system accessed by the energy storage system;
and stopping the charge maintenance of the energy storage system when the operation parameters of the power system do not meet the charge maintenance conditions of the energy storage system.
7. A management device for an energy storage system, the energy storage system comprising a plurality of energy storage units, the device comprising:
the first acquisition unit is used for acquiring the operation parameters of the power system accessed by the energy storage system;
the second acquisition unit is used for acquiring a plurality of open-circuit voltages corresponding to the plurality of energy storage units in the energy storage system if the operation parameters of the power system meet the charging maintenance conditions of the energy storage system;
a determination unit configured to determine a maximum open-circuit voltage among the plurality of open-circuit voltages; acquiring a voltage difference between the maximum open circuit voltage and other open circuit voltages except the maximum open circuit voltage in the plurality of open circuit voltages to obtain a first voltage difference set; acquiring a first target voltage difference subset from the first voltage difference set, wherein elements in the first target voltage difference subset are all voltage differences higher than a preset voltage difference threshold in the first voltage difference set; determining an energy storage unit with a lower open-circuit voltage in two energy storage units corresponding to the voltage differences respectively in the first target voltage difference subset as an energy storage unit to be maintained;
The maintenance unit is used for determining a target voltage difference corresponding to the target energy storage unit to be maintained; the target energy storage unit to be maintained is any one of all the energy storage units to be maintained, and the target voltage difference is a voltage difference corresponding to the target energy storage unit to be maintained in the first target voltage difference subset; determining a target difference value between the target voltage difference and the preset voltage difference threshold as a target maintenance voltage value corresponding to a target energy storage unit; acquiring power adjustment information corresponding to the target maintenance voltage value, and determining the power adjustment information as maintenance parameters corresponding to the target energy storage unit; repeatedly executing the determination processing of the target maintenance voltage value and the acquisition processing of the power adjustment information aiming at each energy storage unit to be maintained until maintenance parameters corresponding to each energy storage unit to be maintained in all the energy storage units to be maintained are obtained; and respectively carrying out charging treatment on each energy storage unit to be maintained according to the maintenance parameters.
8. A terminal comprising a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory being interconnected, wherein the memory is adapted to store a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the method of any of claims 1-6.
9. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of any of claims 1-6.
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