CN115940224A - Charge-discharge control method, device, equipment and medium of energy storage system - Google Patents
Charge-discharge control method, device, equipment and medium of energy storage system Download PDFInfo
- Publication number
- CN115940224A CN115940224A CN202211453315.2A CN202211453315A CN115940224A CN 115940224 A CN115940224 A CN 115940224A CN 202211453315 A CN202211453315 A CN 202211453315A CN 115940224 A CN115940224 A CN 115940224A
- Authority
- CN
- China
- Prior art keywords
- charging
- energy storage
- storage system
- determining
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a charge and discharge control method, a charge and discharge control device, charge and discharge control equipment and a charge and discharge control medium of an energy storage system. The method comprises the following steps: determining the working mode of the energy storage system according to the operation mode of the power grid; determining the charging and discharging state of the storage battery according to the state parameters of the storage battery in the energy storage system, and predicting the SOH (state of health) of the storage battery; and determining a charge-discharge strategy of the energy storage system according to the working mode, the charge-discharge state, the state parameters and the SOH, and controlling the charge and discharge of the storage battery of the energy storage system based on the charge-discharge strategy. According to the technical scheme, the optimal charge and discharge strategy of the energy storage system can be determined more comprehensively and accurately, so that the charge and discharge efficiency of the energy storage system is improved, and the service life of the battery is prolonged.
Description
Technical Field
The invention relates to the field of power grids, in particular to a charging and discharging control method, a charging and discharging control device, charging and discharging control equipment and a charging and discharging control medium of an energy storage system.
Background
The energy storage system in the microgrid is generally composed of a plurality of groups of storage batteries, and energy can be stored in the storage batteries through an external inverter and can also be stably transmitted to the power grid in a grid-connected state. The energy storage system has better stability and higher energy density. However, the storage battery of the energy storage system needs frequent charging and discharging, and the loss of the battery is large.
Therefore, how to determine the optimal charging and discharging strategy of the energy storage system more comprehensively and accurately so as to improve the charging and discharging efficiency of the energy storage system and prolong the service life of the battery is a problem to be solved urgently at present.
Disclosure of Invention
The invention provides a charge-discharge control method, a charge-discharge control device, charge-discharge equipment and a charge-discharge medium of an energy storage system, which can more comprehensively and accurately determine the optimal charge-discharge strategy of the energy storage system, thereby improving the charge-discharge efficiency of the energy storage system and prolonging the service life of a battery.
According to an aspect of the present invention, there is provided a charge and discharge control method of an energy storage system, including:
determining the working mode of the energy storage system according to the operation mode of the power grid;
determining the charge-discharge state of the storage battery according to the state parameters of the storage battery in the energy storage system, and predicting the SOH (state of health) of the storage battery;
and determining a charge-discharge strategy of the energy storage system according to the working mode, the charge-discharge state, the state parameters and the SOH, and controlling the charge and discharge of the storage battery of the energy storage system based on the charge-discharge strategy.
According to another aspect of the present invention, there is provided a charge and discharge control apparatus of an energy storage system, including:
the determining module is used for determining the working mode of the energy storage system according to the operation mode of the power grid;
the prediction module is used for determining the charging and discharging state of the storage battery according to the state parameters of the storage battery in the energy storage system and predicting the SOH (state of health) of the storage battery;
the control module is used for determining a charging and discharging strategy of the energy storage system according to the working mode, the charging and discharging state, the state parameter and the SOH, and controlling the charging and discharging of the storage battery of the energy storage system based on the charging and discharging strategy
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,
the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the method for controlling charging and discharging of the energy storage system according to any embodiment of the present invention.
According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to implement a charging and discharging control method of an energy storage system according to any embodiment of the present invention when the computer instructions are executed.
According to the technical scheme of the embodiment of the invention, the working mode of the energy storage system is determined according to the operation mode of a power grid, the charging and discharging state of the storage battery is determined according to the state parameter of the storage battery in the energy storage system, the SOH of the storage battery is predicted, the charging and discharging strategy of the energy storage system is determined according to the working mode, the charging and discharging state, the state parameter and the SOH, and the charging and discharging of the storage battery of the energy storage system is controlled based on the charging and discharging strategy.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a charging and discharging control method for an energy storage system according to an embodiment of the present invention;
fig. 2 is a flowchart of a charge and discharge control method for an energy storage system according to a second embodiment of the present invention;
fig. 3 is a block diagram of a charge and discharge control device of an energy storage system according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," "target," "candidate," "alternative," and the like in the description and claims of the invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1 is a flowchart of a charging and discharging control method for an energy storage system according to an embodiment of the present invention, where the method is applicable to a situation where the energy storage system charges and discharges a storage battery based on a charging and discharging policy, the method may be implemented by a charging and discharging control device of the energy storage system, the charging and discharging control device of the energy storage system may be implemented in a form of hardware and/or software, and the charging and discharging control device of the energy storage system may be configured in an electronic device and executed by the energy storage system. The energy storage system is used for acquiring electric energy through an external inverter and storing the electric energy into a storage battery pack, namely charging; the method is also used for stably transmitting the electric energy in the storage battery pack to electric equipment of a power grid, namely discharging. As shown in fig. 1, the charge and discharge control method of the energy storage system includes:
and S101, determining the working mode of the energy storage system according to the operation mode of the power grid.
The operation mode of the power grid refers to a mode representing a cooperation mode between the power grid and the energy storage system. The operating modes may include an island operating mode and a grid-connected operating mode. The island operation mode refers to a mode in which the energy storage system independently charges and discharges electric equipment in the power grid. The grid-connected operation mode refers to a mode in which the energy storage system and other power supply equipment in the power grid charge and discharge electric equipment in the power grid together. The working mode of the energy storage system refers to an access mode that the energy storage system is accessed into a power grid and performs at least one charge and discharge for the power grid. The working modes can include the working modes that the power grid is completely accessed to participate in charge and discharge regulation and the working modes that the power grid is partially accessed to participate in charge and discharge regulation.
Optionally, determining the working mode of the energy storage system according to the operation mode of the power grid includes: if the operation mode of the power grid is an island operation mode, determining that the working mode of the energy storage system is completely connected into the power grid to participate in charging and discharging regulation; and if the operation mode of the power grid is a grid-connected operation mode, determining that the working mode of the energy storage system is that part of the energy storage system is connected into the power grid to participate in charging and discharging regulation.
Optionally, after the working mode of the energy storage system is determined to be that part of the storage batteries are connected to the power grid to participate in charging and discharging regulation, the number of groups of storage batteries in the energy storage system to be connected to the power grid can be determined according to relevant parameters of existing storage batteries in the power grid.
S102, determining the charging and discharging state of the storage battery according to the state parameters of the storage battery in the energy storage system, and predicting the SOH of the storage battery.
The energy storage system may include at least one battery pack. The state parameter of the storage battery refers to a battery parameter which can represent the state of the battery, and the battery parameter can comprise at least one of the following: voltage, current, internal resistance, and temperature. The charge and discharge state may include a charge state and a discharge state. The state of health (SOH) may represent a service life condition of the battery, and specifically, the state of health of the battery may be determined by a percentage of a current capacity of the battery to a factory capacity of the battery.
Optionally, the energy storage system may collect the state parameters related to the storage battery in real time, input the state parameters of the storage battery into a pre-trained analysis model, and output an analysis result of the charge-discharge state of the storage battery, so as to determine the charge-discharge state of the storage battery, input the state parameters of the storage battery into a pre-trained prediction model, predict the state of health SOH of the storage battery, and output a predicted SOH value of the storage battery.
Optionally, the energy storage system may collect State parameters related to the storage battery in real time, estimate a percentage of remaining charge (SOC) of the storage battery based on a preset calculation rule, such as an unscented kalman filter method, determine a charge/discharge State of the storage battery according to an estimation result of the SOC, and predict a State of health (SOH) of the storage battery.
S103, determining a charge and discharge strategy of the energy storage system according to the working mode, the charge and discharge state, the state parameter and the SOH, and controlling the charge and discharge of a storage battery of the energy storage system based on the charge and discharge strategy.
The charge and discharge strategy refers to an execution strategy for charging and discharging the storage battery of the energy storage system in a future period of time.
Optionally, determining a charging and discharging strategy of the energy storage system according to the working mode, the charging and discharging state, the state parameter and the SOH includes: determining the SOC of the storage battery according to the state parameters of the storage battery in the energy storage system; if the working mode is that part of the energy storage system is connected to a power grid to participate in charge and discharge regulation, and the charge and discharge state is a charge state, determining the charge modes of the energy storage system at different stages according to the SOC, a preset charge SOC threshold value, the SOH, a preset charge SOH threshold value, the battery voltage and the voltage threshold value; and determining a charging and discharging strategy of the energy storage system based on the charging mode.
The State of charge (SOC) of the battery may be represented by a State of charge (called a remaining capacity), and may represent a capability of the battery to continue power supply. The charging SOC threshold value is a preset threshold value for measuring whether the SOC is too low in the charging process of the battery. The charging SOH threshold is a preset threshold for measuring whether the SOH is too low during the charging process of the battery. The charging mode refers to a mode which can represent a charging mode of the battery, and the charging mode can be a constant current charging mode, a constant voltage charging mode, a floating charging mode or a constant power charging mode.
Optionally, the state parameters of the storage battery in the energy storage system may be input into a pre-trained model, and the SOC of the storage battery is output; the SOC of the battery may also be estimated based on an Unscented KALMAN Filter (Unscented KALMAN Filter, UKF) and state parameters of the battery in the energy storage system.
Optionally, the working mode is that part of the power grid is connected to participate in the regulation and control of charging and discharging, and the charging and discharging state is the charging state, and according to the SOC, the preset SOC threshold value of charging, the SOH, the preset SOH threshold value of charging, the battery voltage and the voltage threshold value, the charging mode of the energy storage system at different stages is determined, and the method includes: if the SOH is detected to be smaller than or equal to a preset charging SOH threshold value, the battery voltage is detected to be smaller than a preset voltage threshold value, and the SOC is detected to be smaller than or equal to a preset first charging SOC threshold value, determining that the charging mode of the first stage is a constant current charging mode; in the process of charging based on the constant-current charging mode, if the battery voltage is detected to be greater than a preset voltage threshold, determining that the charging mode of the second stage is a constant-voltage charging mode; in the process of charging based on the constant-voltage charging mode, if the SOC is detected to be greater than or equal to a preset second charging SOC threshold value, determining that the charging mode of the third stage is a floating charging mode; and in the process of charging based on the floating charge charging mode, if the SOC reaches a preset third charging SOC threshold value, stopping charging the storage battery.
The voltage threshold refers to a threshold for measuring whether the battery voltage reaches a certain level. The constant current charging mode refers to a mode in which the battery is charged with a constant current. The constant voltage charging mode is a mode in which the battery is charged with a constant voltage. The floating charging mode is a charging mode in which a power supply circuit and a storage battery pack are continuously connected in parallel to supply power, namely a full floating charging working mode. The first charging SOC threshold value is less than the second charging SOC threshold value, which is less than the third charging SOC threshold value. For example, the first charge SOC threshold may be 80%, the second charge SOC threshold may be 90%, and the third charge SOC threshold may be 100%.
Optionally, the change condition of the SOC within the preset time period may be analyzed based on a preset rule, so as to determine the current charge and discharge state of the storage battery, that is, determine the charge and discharge state.
For example, if it is detected that the SOH is less than or equal to the preset charging SOH threshold, the battery voltage is less than the preset voltage threshold, and the SOC is less than or equal to 80%, it is determined that the charging of the storage battery is started, that is, the first stage of charging is entered, and the charging mode of the first stage is the constant current charging mode.
For example, in the charging based on the constant voltage charging mode, if it is detected that the SOC is greater than or equal to 90%, the charging in the second stage is ended, the charging in the third stage is started, and the charging mode in the third stage is determined to be the floating charge charging mode.
For example, in the charging based on the float charging mode, if the SOC is detected to reach 100%, it is determined that the battery is fully charged, and the charging of the secondary battery may be stopped.
Optionally, after determining the charging modes of the energy storage system in different stages, the storage battery may be charged based on the determined charging modes in different stages based on the corresponding charging modes, and when the electrical equipment in the power grid sends a discharging request, the electrical equipment is discharged to the power grid equipment, that is, the charging and discharging strategy of the energy storage system is determined.
Optionally, after determining the charging modes of the energy storage system at different stages, one possible implementation manner of performing charging on the storage battery based on the different charging modes is as follows: if the charging mode is a constant current charging mode, a single closed loop control system is adopted, wherein a current loop is controlled by a PI (Proportional Integral) regulator; if the charging mode is a constant voltage charging mode, a current loop is used as an inner loop, a voltage loop is used as an outer loop, and the current loop and the voltage loop pass through a double closed loop control system of the PI regulator respectively; if the charging mode is a floating charging mode, the same control strategy as the constant voltage mode can be adopted because constant voltage and low current charging is required; and if the charging mode is a constant-power charging mode, charging in a mode of setting voltage and controlling current.
According to the technical scheme of the embodiment of the invention, the working mode of the energy storage system is determined according to the operation mode of a power grid, the charging and discharging state of the storage battery is determined according to the state parameter of the storage battery in the energy storage system, the SOH of the storage battery is predicted, the charging and discharging strategy of the energy storage system is determined according to the working mode, the charging and discharging state, the state parameter and the SOH, and the charging and discharging of the storage battery of the energy storage system is controlled based on the charging and discharging strategy.
Optionally, after controlling charging and discharging of the storage battery of the energy storage system, the method further includes: in the process of charging and discharging the storage battery, optimizing a charging and discharging strategy of the storage battery according to the real-time state parameters and the SOH; and controlling the charging and discharging of the storage battery of the energy storage system according to the optimized charging and discharging strategy.
For example, the charging and discharging conditions of each storage battery pack of the energy storage system may be detected according to real-time state parameters, and if it is detected that the charging and discharging amount of the storage battery pack in a preset time period is greater than a certain threshold, the charging and discharging strategy of the storage battery is optimized, where the optimized charging and discharging strategy may be: the charge and discharge amount of the storage battery pack is reduced by controlling the PWM signal of a DC-DC converter (direct current-direct current converter) connected with the storage battery pack and switching on and off the relevant switch connected with the storage battery pack, so that the charge and discharge amount of each storage battery pack is balanced and controlled, and the problem of unbalanced actual charge and discharge amount of the battery in the charge and discharge process of the storage battery pack is solved.
For example, the charging and discharging strategy of the storage battery may be optimized according to the real-time state parameter and SOH, specifically, when it is detected that the SOH of the storage battery pack is reduced by 1%, the charging and discharging strategy of the storage battery may be optimized, where the optimized charging and discharging strategy may be: the discharge depth in the battery state parameters is reduced by about 0.5%, so that the battery can be circulated for more times, and the loss is reduced.
The storage batteries can comprise an energy storage battery and a power storage battery, wherein the energy battery pack is a lithium iron phosphate battery, and the power battery pack is a super capacitor, so that the charging and discharging strategies of the storage batteries can be optimized based on the characteristics of the two types of batteries during charging, and the optimal use of energy storage is realized. The equalizing circuit of each storage battery pack adopts a centralized capacitor equalizing circuit.
It should be noted that, in the above manner, the charge and discharge strategy on the energy storage battery side may be optimized in consideration of the state of health and the remaining life of the storage battery.
Example two
Fig. 2 is a flowchart of a charge and discharge control method for an energy storage system according to a second embodiment of the present invention, and this embodiment further explains in detail "determining a charge and discharge state of a storage battery according to state parameters of the storage battery in the energy storage system and predicting a state of health SOH of the storage battery" based on the above technical solutions, and as shown in fig. 2, the charge and discharge control method for an energy storage system includes:
s201, determining the working mode of the energy storage system according to the operation mode of the power grid.
And S202, determining the SOC of the storage battery according to the state parameters of the storage battery in the energy storage system.
Optionally, the state parameters of the storage battery in the energy storage system can be input into a pre-trained model, and the percentage SOC of the remaining electric quantity of the storage battery is output; determining the percentage SOC of the residual electric quantity of the storage battery according to the state parameters of the storage battery in the energy storage system, wherein the determining comprises the following steps: and estimating the percentage SOC of the residual electric quantity of the storage battery based on unscented Kalman filtering UKF according to the state parameters of the storage battery in the energy storage system.
Specifically, an equation of state of the energy storage system may be generated according to state parameters of a storage battery in the energy storage system based on an unscented kalman filter method, and the SOC value of the storage battery may be predicted based on the equation of state. For example, the unscented kalman filter method may predict the SOC value by: under the condition that the estimation result is inaccurate, the combination analysis is carried out through the measured value, the estimated value of the algorithm at the last moment of the calculation time and the error of the algorithm, the accurate optimal value is obtained finally, errors possibly existing in other estimation methods are input into the algorithm by Kalman filtering, and the optimal solution can be obtained.
And S203, determining the charge and discharge state of the storage battery according to the change condition of the SOC in the preset time period.
For example, if the SOC value decreases within the preset time period, the charging/discharging state of the battery is a discharging state, and if the SOC value increases within the preset time period, the charging/discharging state of the battery is a charging state.
And S204, predicting the SOH of the storage battery according to the SOC and the preset delivery capacity of the storage battery.
The battery factory capacity refers to a preset standard capacity of the storage battery at the factory.
Optionally, after determining the percentage SOC of the storage battery, the ratio of the SOC to the preset factory battery capacity may be used as the state of health SOH of the storage battery, that is, the state of health SOH of the storage battery is predicted; the SOC and the preset delivery capacity of the battery may also be input into a preset prediction model to predict the state of health SOH of the storage battery.
S205, determining a charging and discharging strategy of the energy storage system according to the working mode, the charging and discharging state, the state parameters and the SOH, and controlling the charging and discharging of the storage battery of the energy storage system based on the charging and discharging strategy.
According to the technical scheme of the embodiment of the invention, after the working mode of the energy storage system is determined, the percentage SOC of the residual electric quantity of the storage battery is determined according to the state parameters of the storage battery in the energy storage system, the charging and discharging state of the storage battery is determined according to the change condition of the SOC in a preset time period, the SOH of the storage battery is predicted according to the SOC and the preset delivery capacity of the storage battery, and finally, the charging and discharging strategy of the energy storage system is determined according to the working mode, the charging and discharging state, the state parameters and the SOH, and the charging and discharging of the storage battery of the energy storage system are controlled based on the charging and discharging strategy.
EXAMPLE III
Fig. 3 is a block diagram of a charge/discharge control device of an energy storage system according to a third embodiment of the present invention, where the charge/discharge control device of the energy storage system according to the third embodiment of the present invention is applicable to a situation where the energy storage system charges or discharges a storage battery based on a charge/discharge strategy, and the charge/discharge control device of the energy storage system may be implemented in a form of hardware and/or software and configured in the energy storage system, as shown in fig. 3, the charge/discharge control device specifically includes: a determination module 301, a prediction module 302, and a control module 303.
Wherein the content of the first and second substances,
the determining module 301 is configured to determine a working mode of the energy storage system according to an operation mode of a power grid;
the prediction module 302 is configured to determine a charge-discharge state of a storage battery according to a state parameter of the storage battery in the energy storage system, and predict a state of health (SOH) of the storage battery;
and the control module 303 is configured to determine a charge and discharge strategy of the energy storage system according to the working mode, the charge and discharge state, the state parameter, and the SOH, and control charge and discharge of a storage battery of the energy storage system based on the charge and discharge strategy.
According to the technical scheme of the embodiment of the invention, the working mode of the energy storage system is determined according to the operation mode of a power grid, the charging and discharging state of the storage battery is determined according to the state parameter of the storage battery in the energy storage system, the SOH of the storage battery is predicted, the charging and discharging strategy of the energy storage system is determined according to the working mode, the charging and discharging state, the state parameter and the SOH, and the charging and discharging of the storage battery of the energy storage system is controlled based on the charging and discharging strategy.
Further, the prediction module 302 may include:
the first SOC determining unit is used for determining the SOC of the storage battery according to the state parameters of the storage battery in the energy storage system;
the state determining unit is used for determining the charging and discharging state of the storage battery according to the change condition of the SOC within a preset time period;
and the predicting unit is used for predicting the SOH of the storage battery according to the SOC and preset delivery capacity of the storage battery.
Further, the SOC determining unit is specifically configured to:
and estimating the SOC of the storage battery based on unscented Kalman filtering UKF according to the state parameters of the storage battery in the energy storage system.
Further, the control module 303 may include:
the second SOC determining unit is used for determining the SOC of the storage battery according to the state parameters of the storage battery in the energy storage system;
the mode determining unit is used for determining the charging modes of the energy storage system at different stages according to the SOC, a preset charging SOC threshold value, the SOH, a preset charging SOH threshold value, the battery voltage and the voltage threshold value if the working mode is that part of the working mode is accessed to the power grid to participate in charging and discharging regulation and the charging and discharging state is a charging state;
and the strategy determining unit is used for determining a charging and discharging strategy of the energy storage system based on the charging mode.
Further, the mode determining unit is specifically configured to:
if the SOH is detected to be smaller than or equal to a preset charging SOH threshold value, the battery voltage is detected to be smaller than a preset voltage threshold value, and the SOC is detected to be smaller than or equal to a preset first charging SOC threshold value, determining that the charging mode of the first stage is a constant current charging mode;
in the process of charging based on the constant-current charging mode, if the battery voltage is detected to be greater than a preset voltage threshold, determining that the charging mode of the second stage is a constant-voltage charging mode;
in the process of charging based on the constant-voltage charging mode, if the SOC is detected to be greater than or equal to a preset second charging SOC threshold value, determining that the charging mode of the third stage is a floating charging mode;
and in the process of charging based on the floating charge charging mode, if the SOC is detected to reach a preset third charging SOC threshold value, the storage battery is stopped being charged.
Further, the determining module 301 is specifically configured to:
if the operation mode of the power grid is an island operation mode, determining that the working mode of the energy storage system is completely switched in the power grid to participate in charging and discharging regulation and control;
and if the operation mode of the power grid is a grid-connected operation mode, determining that the working mode of the energy storage system is that part of the energy storage system is connected into the power grid to participate in charging and discharging regulation.
Further, the apparatus is further configured to:
in the process of charging and discharging the storage battery, optimizing a charging and discharging strategy of the storage battery according to the real-time state parameters and the SOH;
and controlling the charging and discharging of the storage battery of the energy storage system according to the optimized charging and discharging strategy.
Example four
Fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention. FIG. 4 shows a schematic block diagram of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from a storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the electronic apparatus 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to the bus 14.
A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 11 performs the various methods and processes described above, such as the charge and discharge control method of the energy storage system.
In some embodiments, the charge and discharge control method of the energy storage system may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the above-described charge and discharge control method of the energy storage system may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the charging and discharging control method of the energy storage system by any other suitable means (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A charge-discharge control method of an energy storage system is characterized by comprising the following steps:
determining the working mode of the energy storage system according to the operation mode of the power grid;
determining the charge-discharge state of the storage battery according to the state parameters of the storage battery in the energy storage system, and predicting the SOH (state of health) of the storage battery;
and determining a charge-discharge strategy of the energy storage system according to the working mode, the charge-discharge state, the state parameters and the SOH, and controlling the charge and discharge of a storage battery of the energy storage system based on the charge-discharge strategy.
2. The method of claim 1, wherein determining the state of charge and discharge of the battery based on the state parameters of the battery in the energy storage system and predicting the state of health (SOH) of the battery comprises:
determining the SOC of the storage battery according to the state parameters of the storage battery in the energy storage system;
determining the charge-discharge state of the storage battery according to the change condition of the SOC within a preset time period;
and predicting the SOH of the storage battery according to the SOC and the preset delivery capacity of the storage battery.
3. The method of claim 2, determining the SOC of the battery based on the state parameter of the battery in the energy storage system, comprising:
and estimating the SOC of the storage battery based on unscented Kalman filter UKF according to the state parameters of the storage battery in the energy storage system.
4. The method of claim 1, wherein determining the charging and discharging strategy of the energy storage system according to the operating mode, the charging and discharging state, the state parameter and the SOH comprises:
determining the SOC of the storage battery according to the state parameters of the storage battery in the energy storage system;
if the working mode is that part of the working mode is connected into a power grid to participate in charging and discharging regulation, and the charging and discharging state is a charging state, determining the charging modes of the energy storage system at different stages according to the SOC, a preset charging SOC threshold value, the SOH, a preset charging SOH threshold value, the battery voltage and the voltage threshold value;
and determining a charging and discharging strategy of the energy storage system based on the charging mode.
5. The method of claim 4, wherein determining the charging mode of the energy storage system at different stages based on the SOC, a preset charging SOC threshold, the SOH, a preset charging SOH threshold, the battery voltage, and the voltage threshold comprises:
if the SOH is detected to be smaller than or equal to a preset charging SOH threshold value, the battery voltage is detected to be smaller than a preset voltage threshold value, and the SOC is detected to be smaller than or equal to a preset first charging SOC threshold value, determining that the charging mode of the first stage is a constant current charging mode;
in the process of charging based on the constant-current charging mode, if the battery voltage is detected to be greater than a preset voltage threshold, determining that the charging mode of the second stage is a constant-voltage charging mode;
in the process of charging based on the constant-voltage charging mode, if the SOC is detected to be greater than or equal to a preset second charging SOC threshold value, determining that the charging mode of the third stage is a floating charging mode;
and in the process of charging based on the floating charge charging mode, if the SOC reaches a preset third charging SOC threshold value, stopping charging the storage battery.
6. The method of claim 1, wherein determining the operating mode of the energy storage system based on the operating mode of the grid comprises:
if the operation mode of the power grid is an island operation mode, determining that the working mode of the energy storage system is completely switched in the power grid to participate in charging and discharging regulation and control;
and if the operation mode of the power grid is a grid-connected operation mode, determining that the working mode of the energy storage system is that part of the energy storage system is connected into the power grid to participate in charging and discharging regulation.
7. The method of claim 1, further comprising:
in the process of charging and discharging the storage battery, optimizing a charging and discharging strategy of the storage battery according to the real-time state parameters and the SOH;
and controlling the charging and discharging of the storage battery of the energy storage system according to the optimized charging and discharging strategy.
8. A charge-discharge control device for an energy storage system, comprising:
the determining module is used for determining the working mode of the energy storage system according to the operation mode of the power grid;
the prediction module is used for determining the charging and discharging state of the storage battery according to the state parameters of the storage battery in the energy storage system and predicting the SOH (state of health) of the storage battery;
and the control module is used for determining a charging and discharging strategy of the energy storage system according to the working mode, the charging and discharging state, the state parameter and the SOH, and controlling the charging and discharging of the storage battery of the energy storage system based on the charging and discharging strategy.
9. An electronic device, characterized in that the electronic device comprises:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the charge and discharge control method of an energy storage system according to any one of claims 1 to 7.
10. A computer-readable storage medium storing computer instructions for causing a processor to implement the method of controlling charging and discharging of an energy storage system according to any one of claims 1 to 7 when executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211453315.2A CN115940224A (en) | 2022-11-21 | 2022-11-21 | Charge-discharge control method, device, equipment and medium of energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211453315.2A CN115940224A (en) | 2022-11-21 | 2022-11-21 | Charge-discharge control method, device, equipment and medium of energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115940224A true CN115940224A (en) | 2023-04-07 |
Family
ID=86654996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211453315.2A Pending CN115940224A (en) | 2022-11-21 | 2022-11-21 | Charge-discharge control method, device, equipment and medium of energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115940224A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116365669A (en) * | 2023-06-01 | 2023-06-30 | 钛玛科（北京）工业科技有限公司 | Network management optimization method and system for lithium battery |
| CN116683588A (en) * | 2023-08-02 | 2023-09-01 | 深圳市神通天下科技有限公司 | Lithium ion battery charge and discharge control method and system |
| CN117497887A (en) * | 2023-12-14 | 2024-02-02 | 杭州义益钛迪信息技术有限公司 | Storage battery management method and system |
| CN117497887B (en) * | 2023-12-14 | 2024-04-26 | 杭州义益钛迪信息技术有限公司 | Storage battery management method and system |
-
2022
- 2022-11-21 CN CN202211453315.2A patent/CN115940224A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116365669A (en) * | 2023-06-01 | 2023-06-30 | 钛玛科（北京）工业科技有限公司 | Network management optimization method and system for lithium battery |
| CN116365669B (en) * | 2023-06-01 | 2023-11-03 | 钛玛科（北京）工业科技有限公司 | Network management optimization method and system for lithium battery |
| CN116683588A (en) * | 2023-08-02 | 2023-09-01 | 深圳市神通天下科技有限公司 | Lithium ion battery charge and discharge control method and system |
| CN116683588B (en) * | 2023-08-02 | 2024-01-26 | 深圳市神通天下科技有限公司 | Lithium ion battery charge and discharge control method and system |
| CN117497887A (en) * | 2023-12-14 | 2024-02-02 | 杭州义益钛迪信息技术有限公司 | Storage battery management method and system |
| CN117497887B (en) * | 2023-12-14 | 2024-04-26 | 杭州义益钛迪信息技术有限公司 | Storage battery management method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115940224A (en) | Charge-discharge control method, device, equipment and medium of energy storage system | |
| JP5842054B2 (en) | Storage battery analysis system, storage battery analysis method, and storage battery analysis program | |
| CN112666464A (en) | Battery health state prediction method and device, electronic equipment and readable storage medium | |
| JP6590762B2 (en) | Power supply system | |
| WO2020198118A1 (en) | Methods, systems, and devices for estimating and predicting a remaining time to charge and a remaining time to discharge of a battery | |
| JP2018063947A (en) | Storage battery management apparatus, storage battery management method, and program | |
| US11193984B2 (en) | Method and device for the service life-optimized usage of an electrochemical energy store | |
| CN114954105A (en) | Battery replacement method and device, electronic equipment and storage medium | |
| JPWO2017149618A1 (en) | Control device, power generation control device, control method, system, and program | |
| US20160105041A1 (en) | Method and system for charging a battery | |
| CN113190693B (en) | Data processing method and device of energy storage system, electronic equipment and storage medium | |
| CN117526508A (en) | Energy management method, device, equipment and storage medium of battery energy storage system | |
| US20230148201A1 (en) | Method and system for supplying power to device, and related device | |
| CN116231669A (en) | Data processing method, device, electronic equipment and storage medium | |
| CN115395613B (en) | Battery charging management method and device, electronic equipment and storage medium | |
| CN115742781A (en) | Battery charging method and device, electronic equipment and storage medium thereof | |
| CN115692885A (en) | Battery lithium separation protection method and device, electronic equipment and storage medium | |
| CN115902625A (en) | Performance prediction method, device, equipment and storage medium of battery system | |
| KR20230175191A (en) | Method and device for controlling a charging signal for charging a rechargeable battery cell or battery | |
| CN114779109A (en) | Method and device for determining battery health state, electronic equipment and storage medium | |
| CN115864611B (en) | Energy storage battery safety energy storage management method, system, equipment and storage medium | |
| CN115902651A (en) | Power battery testing method, device, equipment and storage medium | |
| WO2024057996A1 (en) | Electricity storage element degradation state calculating device, degradation state calculating method, degradation state calculating program, degradation state estimating device, degradation state estimating method, abnormality detecting device, and abnormality detecting method | |
| CN116961188A (en) | Scheduling method and device of base station power supply, electronic equipment and readable storage medium | |
| CN115291111A (en) | Training method of battery standing time prediction model and standing time prediction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |