CN117674218A - Control method and control device of energy storage system, energy storage system and storage medium - Google Patents
Control method and control device of energy storage system, energy storage system and storage medium Download PDFInfo
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Abstract
The invention discloses a control method, a control device, an energy storage system and a storage medium of an energy storage system, wherein the current flowing through a power supply bus can be preliminarily determined by using the bus voltage and a second preset threshold value, after the battery voltage is obtained, the state of a current battery can be determined by using the battery voltage and the first preset voltage threshold value, and further the limitation on the charging and discharging currents of the energy storage battery can be adjusted according to the battery state, and finally the current flowing through the power supply bus is adjusted, so that the stability on the bus voltage is realized. According to the control method provided by the embodiment of the invention, the power entering and exiting the energy storage battery is effectively reduced by limiting the charging and discharging current of the energy storage battery, so that the energy storage battery is effectively protected on the basis of stabilizing the bus voltage, the service life of the energy storage battery is prolonged, and the safe and reliable use is ensured.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a control method and a control device for an energy storage system, and a storage medium.
Background
The energy storage charging and discharging system is generally connected with the photovoltaic power generation system and the power grid system, and the photovoltaic power generation system and the power grid system work simultaneously in daytime; at night, the photovoltaic power generation side stops working, and the energy storage charging and discharging system can only be connected with the power grid system; and when the power is cut off at night, the photovoltaic power generation system stops generating power, and the power grid system is separated from the energy storage charging and discharging system. At present, in order to ensure that stable control of bus voltage of an energy storage charging and discharging system can be realized under various working conditions, the bus voltage is basically only protected from the stable angle of ensuring the bus voltage, so that an energy storage battery of the energy storage system cannot be effectively protected.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a control method of the energy storage system, which can effectively complete effective protection of the energy storage battery under partial working conditions.
The invention also provides a control device, an energy storage system and a computer readable storage medium for executing the control method.
According to a first aspect of the present invention, there is provided a control method of an energy storage system including an energy storage battery and a power supply bus electrically connected to each other, the control method including:
acquiring battery voltage of the energy storage battery and bus voltage of the power supply bus;
and adjusting the current flowing through the power supply bus according to the battery voltage, the first preset voltage threshold value, the bus voltage and the second preset voltage threshold value.
The control method according to the embodiment of the invention has at least the following beneficial effects:
the current flowing through the power supply bus can be preliminarily determined by using the bus voltage and the second preset threshold value, after the battery voltage is obtained, the state of the current battery can be determined by using the battery voltage and the first preset voltage threshold value, and then the limitation on the charging and discharging current of the energy storage battery can be adjusted according to the battery state, and finally the current flowing through the power supply bus is adjusted, so that the stability of the bus voltage is realized. According to the control method provided by the embodiment of the invention, the power entering and exiting the energy storage battery is effectively reduced by limiting the charging and discharging current of the energy storage battery, so that the energy storage battery is effectively protected on the basis of stabilizing the bus voltage, the service life of the energy storage battery is prolonged, and the safe and reliable use is ensured.
According to some embodiments of the invention, the adjusting the current flowing through the power supply bus according to the battery voltage and the first preset voltage threshold, the bus voltage and the second preset voltage threshold includes:
acquiring a first voltage difference between the battery voltage and the first preset voltage threshold;
acquiring a second voltage difference value between the bus voltage and the second preset voltage threshold;
determining a target current supplied to the power supply bus according to the second voltage difference value;
and adjusting the target current according to the first voltage difference value.
According to some embodiments of the invention, the determining the target current to the supply bus according to the second voltage difference comprises:
obtaining a second intermediate current according to the second voltage difference;
and determining the target current according to the second intermediate current.
According to some embodiments of the invention, the determining the target current from the second intermediate current includes:
acquiring a second battery current;
the target current is determined from the second battery current and the second intermediate current.
According to some embodiments of the invention, the determining the target current from the second battery current and the second intermediate current comprises:
calculating a second current difference of the second battery current and the second intermediate current;
determining a second operating duty cycle from the second current difference;
and determining the target current according to the second operation duty cycle.
According to some embodiments of the invention, the adjusting the target current according to the first voltage difference comprises:
obtaining a first intermediate current according to the first voltage difference;
and adjusting the target current according to the first intermediate current.
According to some embodiments of the invention, the adjusting the target current according to the first intermediate current includes:
acquiring a first battery current;
the target current is adjusted according to the first battery current and the first intermediate current.
According to some embodiments of the invention, the adjusting the target current according to the first battery current and the first intermediate current includes:
calculating a first current difference of the first battery current and the first intermediate current;
determining a first operating duty cycle from the first current difference;
and adjusting the target current according to the first operation duty cycle.
The control device according to an embodiment of the second aspect of the present invention includes a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method according to the embodiment of the first aspect when executing the computer program. The control device adopts all the technical schemes of the control method of the embodiment, so that the control device has at least all the beneficial effects brought by the technical schemes of the embodiment.
An energy storage system according to an embodiment of the third aspect of the present invention comprises a control device according to an embodiment of the third aspect described above. The energy storage system adopts all the technical schemes of the control device of the embodiment, so that the energy storage system has at least all the beneficial effects brought by the technical schemes of the embodiment.
A computer-readable storage medium according to an embodiment of a fourth aspect of the present invention stores computer-executable instructions for performing the control method as described in the above-described first and second aspect embodiments. Since the computer-readable storage medium adopts all the technical solutions of the control method of the above embodiments, it has at least all the advantageous effects brought by the technical solutions of the above embodiments.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a system block diagram of an energy storage system according to an embodiment of the present invention;
FIG. 2 is a system block diagram of an energy storage system according to another embodiment of the present invention;
FIG. 3 is a method flow chart of a method of controlling an energy storage system according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method of regulating current flowing through a power bus in accordance with one embodiment of the present invention;
fig. 5 is a control flow chart of a control method of the energy storage system according to an embodiment of the invention.
Reference numerals:
the energy storage battery 100, the energy storage converter 200, the photovoltaic power generation system 300, the power grid system 400 and the power supply bus 500.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, the description of first, second, etc. is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be determined reasonably by a person skilled in the art in combination with the specific content of the technical solution.
Referring to fig. 1, fig. 1 is a system block diagram of an energy storage system according to an embodiment of the present invention, in which both a photovoltaic power generation system 300 and a grid system 400 are directly connected to a power supply bus 500, and an energy storage battery 100 is connected to the power supply bus 500 through an energy storage converter 200. During daytime, the photovoltaic power generation system 300 and the power grid system 400 work normally, and the whole energy storage system can charge the energy storage battery 100 while ensuring the power supply of the power supply bus 500; with further reference to fig. 1, fig. 1 may represent a night scenario of an energy storage system, where the photovoltaic power generation system 300 stops working, the power grid system 400 works normally, and the bus voltage Vdc of the power supply bus 500 is jointly ensured by the power grid system 400 and the energy storage battery 100; fig. 2 is a system block diagram of an energy storage system according to another embodiment of the present invention, which may represent a scenario where the energy storage system is at night and the power grid system 400 is not powered, and only the energy storage battery 100 is used for power supply. Under the above-mentioned various working conditions, in order to keep the bus voltage Vdc stable, it is necessary to detect the bus voltage Vdc and utilize the bus voltage Vdc as a feedback adjustment parameter to realize stable control of the bus voltage Vdc of the power supply bus 500.
Based on this, the control method provided in the embodiment of the present invention may primarily determine the current flowing through the power supply bus 500 by using the bus voltage Vdc and the second preset threshold value, and after the battery voltage Vbatt is obtained, may determine the current state of the battery by using the battery voltage Vbatt and the first preset voltage threshold value, so as to adjust the limitation on the charging and discharging currents of the energy storage battery 100 according to the battery state, and finally adjust the current flowing through the power supply bus 500, thereby achieving the stability of the bus voltage Vdc. According to the control method provided by the embodiment of the invention, the charging and discharging currents of the energy storage battery 100 are limited, so that the power entering and exiting the energy storage battery 100 is effectively reduced, the energy storage battery 100 is effectively protected on the basis of stabilizing the bus voltage Vdc, the service life of the energy storage battery 100 is prolonged, and the safe and reliable use is ensured.
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings, in which it is apparent that the embodiments described below are some, but not all embodiments of the invention.
Referring to fig. 3, fig. 3 is a flowchart of a method for controlling an energy storage system according to an embodiment of the present invention, where the method includes, but is not limited to, the following steps:
step S100, obtaining a battery voltage Vbatt of the energy storage battery 100 and a bus voltage Vdc of the power supply bus 500;
in step S200, the current flowing through the power supply bus 500 is adjusted according to the battery voltage Vbatt and the first preset voltage threshold vbatt_given, and the bus voltage Vdc and the second preset voltage threshold vdc_given.
The second preset voltage threshold vdc_given is a preset target value, and it can be understood that the energy storage system needs to stabilize the bus voltage Vdc at the second preset voltage threshold vdc_given so as to ensure that the whole energy storage system normally supplies power to the outside. After the bus voltage Vdc is obtained, the bus voltage Vdc is used as a feedback adjustment parameter, and the adjustment quantity required by the bus voltage Vdc can be rapidly determined by utilizing the bus voltage Vdc and a second preset voltage threshold value vdc_given, so that the input and output of the energy storage battery 100 are adjusted, the current flowing through the power supply bus 500 is adjusted, and finally the stability of the bus voltage Vdc is ensured. It can be appreciated that the second preset voltage threshold vdc_given may be adjusted according to different energy storage system requirements in different application scenarios, for example, in a home application scenario, the range of the second preset voltage threshold vdc_given is typically 220V to 230V, and the second preset voltage threshold vdc_given specifically takes which value in the range, and may be adjusted individually according to a specific user.
As the primary basis for determining the battery state of the energy storage battery 100, the first preset voltage threshold vbatt_given may be understood that when the battery voltage Vbatt is greater than or equal to the first preset voltage threshold vbatt_given, the electric quantity of the energy storage battery 100 is in a more saturated state, and when the electric quantity is lower than the first preset voltage threshold vbatt_given, the electric quantity of the energy storage battery 100 may be regarded as a normal working state, and under the saturated state and the normal state, the charging and discharging requirements of the energy storage battery 100 are inconsistent. Therefore, when the bus voltage Vdc is adjusted by using the bus voltage Vdc and the second preset voltage threshold value vdc_given, the relationship between the battery voltage Vbatt and the first preset voltage threshold value vbatt_given needs to be fully considered, so that the current flowing through the power supply bus 500 can be correctly adjusted, the stability of the bus voltage Vdc of the power supply bus 500 is ensured, and meanwhile, the service life and the use safety of the energy storage battery 100 can be ensured while the stability of the bus voltage Vdc is ensured on the premise of considering the battery state of the energy storage battery 100.
As shown in fig. 4, fig. 4 is a flowchart of a method for adjusting a current flowing through a power supply bus according to an embodiment of the invention, and step S200 includes, but is not limited to, the following steps:
step S210, obtaining a first voltage difference between the battery voltage Vbatt and a first preset voltage threshold vbatt_given;
step S220, obtaining a second voltage difference value between the bus voltage Vdc and a second preset voltage threshold value vdc_given;
step S230, determining a target current supplied to the power supply bus 500 according to the second voltage difference;
step S240, adjusting the target current according to the first voltage difference.
It will be appreciated that the second voltage difference may directly and effectively reflect the deviation state between the current bus voltage Vdc and the second preset voltage threshold vdc_given, and thus the second voltage difference may be used to determine the target current of the energy storage battery 100 supplied to the power supply bus 500 through the energy storage converter 200.
The battery voltage Vbatt can directly and effectively reflect the current battery state of the energy storage battery 100, and then the target current can be adjusted by utilizing the first voltage difference value, so that on the premise of stabilizing the bus voltage Vdc, reasonable control of charging and discharging of the energy storage battery 100 can be realized, and the problems of overcharging and the like of the energy storage battery 100 are avoided.
Specifically, as shown in fig. 5, fig. 5 is a control flow chart of a control method of an energy storage system according to an embodiment of the present invention, after a bus voltage Vdc is obtained, a second voltage difference is obtained by subtracting a second preset voltage threshold vdc_given from the bus voltage Vdc, and then a target current can be determined by using the second voltage difference, which is the voltage control loop. Meanwhile, the battery voltage Vbatt of the energy storage battery 100 is obtained, a first voltage difference value is obtained by performing subtraction operation on the battery voltage Vbatt and a first preset voltage threshold value vbatt_given, the first voltage difference value reflects the current state of the battery, and then the target current supplied to the power supply bus 500 determined by using the second voltage difference value can be adaptively adjusted by using the first voltage difference value, so as to obtain the target current capable of simultaneously considering the bus voltage Vdc of the power supply bus 500 and the battery state of the energy storage battery 100.
In some embodiments, step S230 includes, but is not limited to, the steps of:
obtaining a second intermediate current according to the second voltage difference;
the target current is determined from the second intermediate current.
The energy storage battery 100 outputs the electric energy to the power supply bus 500, and the control of the energy storage converter 200 needs to be completed by using the current as the control amount, so when the target current needs to be determined, the corresponding second intermediate current needs to be determined by using the second voltage difference value, and then the control of the energy storage converter 200 needs to be determined by using the second intermediate current, so as to obtain the target current.
In some embodiments, the target current is determined from the second intermediate current, including, but not limited to, the steps of:
acquiring a second battery current;
the target current is determined from the second battery current and the second intermediate current.
It will be appreciated that when it is desired to control the output of the energy storage battery 100, it is necessary to consider the battery current Ibatt output by the energy storage battery 100 at the same time, so that more accurate output control of the energy storage battery 100 may be achieved. The battery current Ibatt of the energy storage battery 100, i.e. the second battery current, is used as a feedback adjustment parameter to adjust the second intermediate current, so that the target current can be better adjusted. The current control loop is used for completing the process of regulating the target current by using the battery current Ibatt.
In some embodiments, the target current is determined from the second battery current and the second intermediate current, including, but not limited to, the steps of:
calculating a second current difference between the second battery current and the second intermediate current;
determining a second operating duty cycle based on the second current difference;
the target current is determined based on the second operating duty cycle.
The second battery current may reflect the charge and discharge state of the current energy storage battery 100, and further, a second current difference between the second battery current and the second intermediate current may be used to obtain a state that may more represent that the current energy storage battery 100 needs to be regulated, and further, the second current difference may be further used to determine a second operation duty ratio required for controlling the energy storage converter 200 to perform electric energy conversion output, so that control of the energy storage converter 200 may be finally completed according to the second operation duty ratio, so that the energy storage converter 200 may output a desired target current.
Specifically, as shown in fig. 5, after the second intermediate current is obtained, the second battery current collected synchronously is subtracted from the second intermediate current to obtain a control current for adjusting the energy storage converter 200, and the control current is input to the second controller C2 to obtain a corresponding second operation duty ratio, and finally the control of the energy storage converter 200 is completed by using the second operation duty ratio to obtain the target current. It should be noted that, the control of the energy storage converter 200 may be performed by the third controller S1 and the fourth controller S2 shown in fig. 5, where the third controller S1 is configured to control the energy storage converter 200 to output the battery current with the second operation duty ratio, and finally, to be converted into the control of the bus voltage Vdc of the power supply bus 500 through the fourth control.
In some embodiments, step S240 includes, but is not limited to, the following steps:
obtaining a first intermediate current according to the first voltage difference;
the target current is adjusted according to the first intermediate current.
The first voltage difference is obtained by subtracting the battery voltage Vbatt from a first preset voltage threshold vbatt_given, reflecting the current battery state of the energy storage battery 100. When the first voltage difference is positive or zero, it indicates that the battery voltage Vbatt is greater than or equal to the first preset voltage threshold vbatt_given, which indicates that the energy storage battery 100 may be in a state with a higher electric quantity, it is necessary to reduce the charge-discharge current of the energy storage battery 100 to reduce the energy entering and exiting the energy storage battery 100, and the target current determined according to the second intermediate current is adjusted by using the first intermediate current, so that the target current is effectively reduced, thereby protecting the use safety and the service life of the energy storage battery 100.
Specifically, a maximum current threshold is set, and only when the battery voltage Vbatt is greater than or equal to the first preset voltage threshold vbatt_given, the battery voltage Vbatt is enabled to be smaller than the maximum current threshold, so that the charging and discharging currents of the energy storage battery 100 are effectively limited, and meanwhile stability of the bus voltage Vdc is guaranteed. It should be noted that the specific value of the maximum current threshold is determined according to the requirement of the actual energy storage system, which is not further limited herein.
It can be understood that when the first voltage difference is a negative number, it is indicated that the battery voltage Vbatt is smaller than the first preset voltage threshold value vbatt_given, and the electric quantity of the energy storage battery 100 is not in a relatively high state, so that the charge and discharge flow of the energy storage battery 100 is not required to be limited, and the charge and discharge control of the energy storage system can be continuously completed by using the voltage ring and the current ring.
In some embodiments, adjusting the target current based on the first intermediate current includes, but is not limited to, the steps of:
acquiring a first battery current;
the target current is adjusted based on the first battery current and the first intermediate current.
It will be appreciated that when it is desired to control the output of the energy storage battery 100, it is necessary to consider the battery current Ibatt output by the energy storage battery 100 at the same time, so that more accurate output control of the energy storage battery 100 may be achieved. The first battery current is also the battery current Ibatt of the energy storage battery 100, and the first battery current and the second battery current are the same current.
For adjusting the target current with the first battery current and the first intermediate current, it is also necessary to make a determination according to the magnitude relation between the battery voltage Vbatt and the first preset voltage threshold value vbatt_given. When the battery voltage Vbatt is greater than or equal to the first preset voltage threshold value vbatt_given, it is indicated that the energy storage battery 100 may be in a state with higher electric quantity, and it is necessary to reduce the charge-discharge current of the energy storage battery 100 so as to reduce the energy entering and exiting the energy storage battery 100, at this time, the adjustment of the second intermediate current is completed by using the first intermediate current, and then the adjusted current is further adjusted by using the first battery current, so as to obtain the target current capable of ensuring the bus voltage Vdc and ensuring the safety and the service life of the battery. It should be noted that, when the battery voltage Vbatt is smaller than the first preset voltage threshold value vbatt_given, the electric quantity of the energy storage battery 100 is not in a relatively high state, and therefore, the charge and discharge flow of the energy storage battery 100 is not required to be limited, and the charge and discharge control of the energy storage system can be completed by continuously using the voltage ring and the current ring.
In some embodiments, adjusting the target current based on the first battery current and the first intermediate current includes, but is not limited to, the steps of:
calculating a first current difference between the first battery current and the first intermediate current;
determining a first operating duty cycle from the first current difference;
the target current is adjusted according to the first operating duty cycle.
The first battery current may reflect the charge and discharge state of the current energy storage battery 100, and further, a state that the current energy storage battery 100 needs to be adjusted may be better represented by using a first current difference between the first battery current and the first intermediate current, and further, a first operation duty ratio required for controlling the energy storage converter 200 to perform electric energy conversion output may be adjusted by using the first current difference, so that the adjustment of the energy storage converter 200 may be finally completed according to the first operation duty ratio, so that the energy storage converter 200 may output a desired target current.
For a better description of the control method of the energy storage system according to the embodiment of the present invention, by way of a specific embodiment, and with reference to fig. 2,
acquiring a first voltage difference between the battery voltage Vbatt and a first preset voltage threshold vbatt_given;
acquiring a second voltage difference value between the bus voltage Vdc and a second preset voltage threshold value vdc_given;
obtaining a second intermediate current according to the second voltage difference;
obtaining a first intermediate current according to the first voltage difference;
obtaining a battery current Ibatt, namely obtaining a second battery current and a first battery current;
calculating a second current difference between the second battery current and the second intermediate current;
determining a second operating duty cycle based on the second current difference;
determining a target current according to the second operating duty cycle;
calculating a first current difference between the first battery current and the first intermediate current;
adjusting the second operation duty ratio according to the first current difference value to obtain a first operation duty ratio;
the target current is adjusted according to the first operating duty cycle.
Subtracting the bus voltage Vdc from a second preset voltage threshold value vdc_given to obtain a second voltage difference value, and inputting the second voltage difference value into the first controller C1 to obtain a second intermediate current; meanwhile, performing subtraction operation on the battery voltage Vbatt and a first preset voltage threshold value vbatt_given to obtain a second voltage difference value, and inputting the second voltage difference value to the first controller C1 to obtain a first intermediate current; the second intermediate current is used as a main control signal for controlling the busbar voltage Vdc, and the first intermediate current is used as an adjusting signal for the second intermediate current.
At this time, the second battery current and the first battery current are obtained, the second battery current is used as a feedback adjustment parameter to correct the second intermediate current, a second current difference value is obtained, the first intermediate current obtained is then corrected by the first battery current, a first current difference value is obtained, and the first current difference value is used as a correction value of the second current difference value.
The second current difference is further input to the second controller C2 to obtain a second operation duty cycle for controlling the operation of the energy storage converter 200, and meanwhile, the first intermediate current is input to the second controller C2 to obtain a corrected first operation duty cycle for correcting the second operation duty cycle, and finally, according to the determination of the target current of the second operation duty cycle, the adjustment of the target current is completed by using the first operation duty cycle.
When the duty ratio of the energy storage converter is actually controlled, the first intermediate current can be directly used for adjusting the second intermediate current in the C1 control stage to obtain the initial target current igive, and then the duty ratio calculation can be completed by using the dehumidification target current igive and the battery current Ibatt according to the current loop logic.
When the bus voltage Vdc is controlled and adjusted by the battery voltage Vbatt, it is necessary to fully consider the relationship between the magnitude of the battery voltage Vbatt and the magnitude of the first preset voltage threshold value vbatt_given, and the larger the battery voltage Vbatt exceeds the first preset voltage threshold value vbatt_given, the larger the magnitude of adjustment is required, and finally, when the battery voltage Vbatt is greater than or equal to the first preset voltage threshold value vbatt_given, the charging and discharging currents of the energy storage battery 100 are limited to be less than the maximum current threshold value. It is understood that when the battery voltage Vbatt is less than the first preset voltage threshold value vbatt_given, the adjustment of the bus voltage Vdc by using the battery voltage Vbatt is not required, and only the control is performed by directly using the voltage ring and the current ring of the bus voltage Vdc.
In some embodiments, when the electric quantity of the energy storage battery 100 is lower than the preset minimum battery threshold value, the output of the energy storage battery 100 is stopped, so as to avoid the over-discharge of the energy storage battery 100 and damage to the battery. In some embodiments, a lower battery threshold is set, and when the battery voltage Vbatt of the energy storage battery 100 is lower than the threshold, an early warning is triggered, so that the user knows that the battery power is lower in advance, and needs to take corresponding protection measures.
In some embodiments, when the photovoltaic power generation system 300 is stopped at night, but the grid system 400 is operating normally, if the battery is not sufficiently charged, the grid system 400 may be used to complete charging of the energy storage battery 100, in addition to ensuring that the bus voltage Vdc is operating normally by using the grid system 400 and the energy storage battery 100. When the power grid system 400 is utilized to charge the bus voltage Vdc, the discharging time of the energy storage battery can be fully calculated, so that the energy storage battery 100 can charge the energy storage battery 100 by utilizing low-price electricity under the condition of peak-valley electricity utilization at night, and the economic benefit of a user is ensured to the greatest extent.
In addition, an embodiment of the present invention also provides a control apparatus including: memory, a processor, and a computer program stored on the memory and executable on the processor. The processor and the memory may be connected by a bus or other means.
The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The non-transitory software programs and instructions required to implement the energy storage system control method of the above embodiments are stored in the memory, and when executed by the processor, perform the energy storage system control method of the above embodiments, for example, perform the method steps S100 to S200, and the method steps S210 to S240 described above.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, an embodiment of the invention also provides an energy storage system, which comprises the control device of the embodiment. The energy storage system adopts all the technical schemes of the control device of the embodiment, so that the energy storage system has at least all the beneficial effects brought by the technical schemes of the embodiment.
Furthermore, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions that are executed by a processor or controller, for example, by one of the processors in the above-described embodiments of the energy storage system, so that the processor performs the control method of the energy storage system in the above-described embodiments, for example, performs the method steps S100 to S200 and the method steps S210 to S240 described above.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media or non-transitory media and communication media or transitory media. The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk DVD or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (11)
1. A control method of an energy storage system, wherein the energy storage system includes an energy storage battery and a power supply bus electrically connected to each other, the control method comprising:
acquiring battery voltage of the energy storage battery and bus voltage of the power supply bus;
and adjusting the current flowing through the power supply bus according to the battery voltage, the first preset voltage threshold value, the bus voltage and the second preset voltage threshold value.
2. The method of claim 1, wherein adjusting the current flowing through the power supply bus according to the battery voltage and a first preset voltage threshold, the bus voltage and a second preset voltage threshold, comprises:
acquiring a first voltage difference between the battery voltage and the first preset voltage threshold;
acquiring a second voltage difference value between the bus voltage and the second preset voltage threshold;
determining a target current supplied to the power supply bus according to the second voltage difference value;
and adjusting the target current according to the first voltage difference value.
3. The method of claim 2, wherein determining the target current to the power bus based on the second voltage difference comprises:
obtaining a second intermediate current according to the second voltage difference;
and determining the target current according to the second intermediate current.
4. A method of controlling an energy storage system according to claim 3, wherein said determining the target current from the second intermediate current comprises:
acquiring a second battery current;
the target current is determined from the second battery current and the second intermediate current.
5. The method of claim 4, wherein determining the target current from the second battery current and the second intermediate current comprises:
calculating a second current difference of the second battery current and the second intermediate current;
determining a second operating duty cycle from the second current difference;
and determining the target current according to the second operation duty cycle.
6. The method of claim 2, wherein adjusting the target current according to the first voltage difference comprises:
obtaining a first intermediate current according to the first voltage difference;
and adjusting the target current according to the first intermediate current.
7. The method of claim 6, wherein adjusting the target current according to the first intermediate current comprises:
acquiring a first battery current;
the target current is adjusted according to the first battery current and the first intermediate current.
8. The method of claim 7, wherein said adjusting said target current based on said first battery current and said first intermediate current comprises:
calculating a first current difference of the first battery current and the first intermediate current;
determining a first operating duty cycle from the first current difference;
and adjusting the target current according to the first operation duty cycle.
9. A control device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements a method for controlling an energy storage system according to any one of claims 1 to 8 when executing the computer program.
10. An energy storage system comprising the control device of claim 9.
11. A computer-readable storage medium storing computer-executable instructions for performing the method of controlling the energy storage system according to any one of claims 1 to 8.
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| CN202211053684.2A CN117674218A (en) | 2022-08-31 | 2022-08-31 | Control method and control device of energy storage system, energy storage system and storage medium |
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| CN202211053684.2A CN117674218A (en) | 2022-08-31 | 2022-08-31 | Control method and control device of energy storage system, energy storage system and storage medium |
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