CN113629739A - Energy storage system control method and device, computer equipment and storage medium - Google Patents
Energy storage system control method and device, computer equipment and storage medium Download PDFInfo
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- CN113629739A CN113629739A CN202111084708.6A CN202111084708A CN113629739A CN 113629739 A CN113629739 A CN 113629739A CN 202111084708 A CN202111084708 A CN 202111084708A CN 113629739 A CN113629739 A CN 113629739A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The present disclosure relates to the field of automatic power generation control technologies of power systems, and in particular, to a method and an apparatus for controlling an energy storage system, a computer device, and a storage medium. The energy storage system control method comprises the steps of obtaining a current frequency value of a power grid system; determining a regulation and control interval where the current frequency value is located; and controlling the energy storage system according to the control logic corresponding to the regulation and control interval. According to the method and the device, the regulation and control interval where the current frequency value is located is determined, different control logics are adopted in different intervals, the frequency modulation potential of the energy storage system is improved, the regulation capacity of the power system under the condition of emergency change of the power grid frequency is further enhanced, and the stability of the system is enhanced. The technical problems that in the prior art, an energy storage system cannot fully exert the dynamic frequency modulation capability and cannot meet the power grid frequency are effectively solved.
Description
Technical Field
The present disclosure relates to the field of automatic power generation control technologies of power systems, and in particular, to a method and an apparatus for controlling an energy storage system, a computer device, and a storage medium.
Background
The frequency regulation response of the traditional hydroelectric and thermal power generating set is slow, and the regulation speed is restricted by safety and cannot be greatly improved. The requirement for adjusting the system frequency is higher and higher after the current power system enters the era with the characteristic of double high, and the original frequency modulation capability depending on the traditional unit can not meet the requirement.
The energy storage power supply has fast and accurate power regulation capability as a power electronic technology, is very suitable for the requirement of the required frequency modulation of the current power system, and is matched and supplemented with the traditional frequency modulation unit, so that the system frequency modulation is more efficient and safer. Meanwhile, the energy storage power supply has the advantage of high efficiency, and because the energy storage power supply is very easy to participate in the matching of the frequency modulation function of the automatic gain control, a relatively small amount of energy storage power supply is introduced, so that the problems of slow response and capacity shortage of regional power grid frequency modulation can be effectively solved, the integral automatic gain control frequency modulation capability of the power system is improved, and the reliability of the power grid operation is improved comprehensively.
The energy storage power supply can alternately realize active power output and active power input without limitation. The conventional generator set needs to consider the amplitude of response power and the limit of the polarity change speed of the generator in the control process, and the power change signal of the conventional generator set has the limit of maximum power up-regulation or power down-regulation in order to ensure the safety of the generator set. Meanwhile, in order to reduce the damage of the generator set caused by frequent alternation of ascending and descending, the power signal in the same direction can only be responded in a certain time period, and the reverse power signal is blocked. The energy storage power supply does not have this limitation in the response of the power change signal.
With the rapid development and gradual maturity of energy storage technology, the participation of large-scale energy storage power sources in power grid frequency modulation has already developed solid theoretical research and demonstration verification. However, the configuration and maintenance of the energy storage system require a large amount of capital investment, and in order to improve the resource utilization rate, a method for exerting the frequency modulation capability of the energy storage system as much as possible needs to be researched.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an energy storage system control method, an apparatus, a computer device and a storage medium.
The embodiment of the application provides an energy storage system control method, which comprises the following steps:
acquiring a current frequency value of a power grid system;
determining a regulation and control interval where the current frequency value is located;
and controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
In one embodiment, the controlling the energy storage system according to the control logic corresponding to the regulation and control interval includes:
when the regulation interval in which the current frequency value is located is an active power control interval, performing active power control on the energy storage system;
and when the regulation and control interval in which the current frequency value is located is a dynamic frequency modulation interval, regulating the storage capacity of the energy storage system.
In one embodiment, when the regulation interval in which the current frequency value is located is an active power control interval, the active power control is performed on the energy storage system, and an adjustment command of automatic gain control is responded.
In one embodiment, the adjusting command in response to the automatic gain control comprises:
acquiring an active power actual value of the energy storage system;
obtaining an active power regulation target of the energy storage system;
obtaining a control target value of the energy storage system according to the actual value of the active power and the active power regulation target;
and controlling the converter direct-current input or output voltage of the energy storage system according to the control target value.
In one embodiment, the controlling the converter dc input or output voltage of the energy storage system according to the control target value includes:
acquiring the actual value of the direct-current voltage of each converter of the energy storage system;
and obtaining the direct current input or output voltage value of the converter according to the actual direct current voltage value and the control target value.
In one embodiment, when the regulation interval in which the current frequency value is located is a dynamic frequency modulation interval, adjusting the storage capacity of the energy storage system includes:
acquiring a load threshold value of the power grid system;
acquiring an upper limit and a lower limit of the storage capacity of the energy storage system;
controlling the storage capacity of the energy storage system to be at the upper limit when the grid system load exceeds the grid system load threshold; and controlling the storage capacity of the energy storage system at the lower limit when the load of the power grid system is lower than the load threshold of the power grid system.
In one embodiment, when the regulation interval in which the current frequency value is located is a dynamic frequency modulation interval, the adjusting the storage capacity of the energy storage system further includes:
discharging when the current storage capacity of the energy storage system is larger than the upper limit;
and if the current storage capacity of the energy storage system is smaller than the lower limit, charging.
In one embodiment, an energy storage system control apparatus includes:
the acquisition module is used for acquiring the current frequency value of the power grid system;
the analysis module is used for determining a regulation and control interval where the current frequency value is located;
and the control module is used for controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
In one embodiment, a computer device comprises a memory storing a computer program and a processor implementing the steps of the method of any of the above embodiments when the processor executes the computer program.
In one of the embodiments, a computer storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method described in any of the above embodiments.
According to the energy storage system control method, the energy storage system control device, the computer equipment and the storage medium, the current frequency value of the power grid system is obtained; determining a regulation and control interval where the current frequency value is located; and controlling the energy storage system according to the control logic corresponding to the regulation and control interval. According to the method and the device, the regulation and control interval where the current frequency value is located is determined, different control logics are adopted in different intervals, the frequency modulation potential of the energy storage system is improved, the regulation capacity of the power system under the condition of emergency change of the power grid frequency is further enhanced, and the stability of the system is enhanced. The technical problems that in the prior art, an energy storage system cannot fully exert the dynamic frequency modulation capability and cannot meet the power grid frequency are effectively solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram of an exemplary embodiment of an energy storage system control method;
FIG. 2 is a schematic flow chart of a method for controlling an energy storage system according to an embodiment;
FIG. 3 is a schematic diagram of an energy storage system control flow of an embodiment of an energy storage system control method;
FIG. 4 is a schematic diagram illustrating an automatic gain control process of an embodiment of a method for controlling an energy storage system;
FIG. 5 is a schematic diagram illustrating a dc input or output voltage flow of a converter according to an embodiment of a method for controlling an energy storage system;
FIG. 6 is a schematic diagram of a storage capacity control flow of the energy storage system control method in one embodiment;
FIG. 7 is a schematic diagram illustrating a storage capacity adjustment process of the energy storage system control method according to an embodiment;
FIG. 8 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all couplings of one or more of the associated listed items.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
As shown in fig. 1, the energy storage system control method provided by the present application may be applied to an energy storage system control device. Obtaining a current frequency value of a power grid system; determining a regulation and control interval where the current frequency value is located; and controlling the energy storage system according to the control logic corresponding to the regulation and control interval. According to the method and the device, the regulation and control interval where the current frequency value is located is determined, different control logics are adopted in different intervals, the frequency modulation potential of the energy storage system is improved, the regulation capacity of the power system under the condition of emergency change of the power grid frequency is further enhanced, and the stability of the system is enhanced. The technical problems that in the prior art, an energy storage system cannot fully exert the dynamic frequency modulation capability and cannot meet the power grid frequency are effectively solved.
In one embodiment, as shown in fig. 2, an energy storage system control method is provided, which is described by taking the method as an example applied to the energy storage system control device shown in fig. 1, and includes the following steps:
s202: and acquiring the current frequency value of the power grid system.
In particular, the energy storage system control means will f1、f2Set as a threshold value of the system frequency, then the threshold value f1And f2The grid frequency is divided into three intervals. And the energy storage system control device acquires the current frequency value of the power grid system, and sets f as the current frequency value of the power grid system.
S204: and determining the regulation and control interval of the current frequency value.
Specifically, the energy storage system control device obtains a current frequency value of the power grid system, sets f as the current frequency value of the power grid system, and determines a regulation and control interval where the current frequency value is located, wherein the current frequency value f>Threshold value f1When, it is interval I; current frequency value f<Threshold value f2When, it is interval II; when the threshold value f2<Current frequency value f<Threshold value f1In this case, it is interval III.
S206: and controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
Specifically, the energy storage system control device controls the energy storage system according to the control logic corresponding to the regulation and control interval. When the frequency value before the system is in the interval I, the energy storage system absorbs active power from the system; when the system frequency is in the interval II, the energy storage system sends active power to the system; when the system frequency is in the interval III, the energy storage system adjusts the self storage capacity, so that the energy storage system has enough adjustable capacity under the condition of dynamic frequency modulation.
In the embodiment, the energy storage system control method obtains the current frequency value of the power grid system; determining a regulation and control interval where the current frequency value is located; and controlling the energy storage system according to the control logic corresponding to the regulation and control interval. According to the method and the device, the regulation and control interval where the current frequency value is located is determined, different control logics are adopted in different intervals, the frequency modulation potential of the energy storage system is improved, the power system is further enhanced in the technology, the energy storage system cannot fully exert the dynamic frequency modulation capability, and the technical problem that the power grid frequency cannot be met is solved.
As shown in fig. 3, in one embodiment, the controlling the energy storage system according to the control logic corresponding to the regulation and control interval includes:
s302: and when the regulation interval in which the current frequency value is located is an active power control interval, performing active power control on the energy storage system.
Specifically, the energy storage system control device controls the energy storage system according to the control logic corresponding to the regulation and control interval. And when the regulation interval in which the current frequency value is located is an active power control interval, performing active power control on the energy storage system. When the frequency value before the system is in the interval I, the energy storage system absorbs active power from the system; and when the system frequency is in the interval II, the energy storage system sends active power to the system.
S304: and when the regulation interval in which the current frequency value is located is the dynamic frequency modulation interval, regulating the storage capacity of the energy storage system.
Specifically, the energy storage system control device controls the energy storage system according to the control logic corresponding to the regulation and control interval. And when the regulation interval in which the current frequency value is located is the dynamic frequency modulation interval, regulating the storage capacity of the energy storage system. When the system frequency is in the interval III, the energy storage system adjusts the self storage capacity, so that the energy storage system has enough adjustable capacity under the condition of dynamic frequency modulation.
In this embodiment, when the regulation and control interval in which the current frequency value is located is an active power control interval, performing active power control on the energy storage system; and when the regulation interval in which the current frequency value is located is a dynamic frequency modulation interval, regulating the storage capacity of the energy storage system. The frequency modulation potential of the energy storage system is improved, the adjusting capacity of the power system under the condition of the emergency change of the power grid frequency is further enhanced, and the stability of the system is enhanced.
In one embodiment, when the regulation interval in which the current frequency value is located is an active power control interval, the energy storage system is subjected to active power control, and an adjustment command of automatic gain control is responded.
Specifically, the energy storage system control device obtains a current frequency value of the power grid system, and when a regulation interval in which the current frequency value is located is an active power control interval, active power control is performed on the energy storage system, and a regulation command of Automatic Gain Control (AGC) is responded. And under the conditions that the active power is absorbed from the system and sent out to the system, the energy storage system responds to the adjusting command of the automatic gain control AGC, takes the active power distributed by the automatic gain control AGC as an adjusting target, and performs PID control to adjust the direct-current output voltage.
In this embodiment, when the regulation and control interval in which the current frequency value is located is an active power control interval, active power control is performed on the energy storage system, and an adjustment command of the automatic gain control AGC is responded, so that the active power of the energy storage system can track a target value, and thus the system frequency is quickly supported.
As shown in fig. 4, in one embodiment, the response to the adjustment command of the automatic gain control includes:
s402: and acquiring an actual active power value of the energy storage system.
Specifically, when the regulation and control interval in which the current frequency value is located is an active power control interval, active power control is performed on the energy storage system, that is, the energy storage system responds to an adjustment command of the automatic gain control AGC under the conditions that active power is absorbed from the system and the active power is sent to the system, the active power distributed by the automatic gain control AGC is used as an adjustment target, and the energy storage system control device acquires an actual active power value of the energy storage system.
S404: and obtaining an active power regulation target of the energy storage system.
Specifically, after the energy storage system control device collects the actual value of the active power of the energy storage system, the energy storage system control device further obtains the active power regulation target of the energy storage system.
S406: and obtaining a control target value of the energy storage system according to the actual value of the active power and the active power regulation target.
Specifically, the energy storage system control device obtains a control target value of the energy storage system according to the actual value of the active power and the active power adjustment target. And the energy storage system control device compares the acquired actual value of the active power of the current energy storage system with the active power regulation target to obtain a comparison structure. And the energy storage system control device performs PID control on the comparison result and takes the PID control result as a direct current voltage control target value of the converter in the energy storage system.
S408: and controlling the converter direct-current input or output voltage of the energy storage system according to the control target value.
Specifically, the energy storage system control device controls the converter direct current input or output voltage of the energy storage system according to the control target value. The energy storage system control device compares the actual value of the direct current voltage collected by each energy storage converter of the energy storage system with the target value, and performs PID control to regulate the direct current input or output voltage.
In this embodiment, an active power adjustment target and an active power adjustment target of the energy storage system are obtained, a control target value of the energy storage system is obtained according to the actual value of the active power and the active power adjustment target, and the converter direct-current input or output voltage of the energy storage system is controlled according to the control target value. And then the active power of the energy storage system can track the target value, so that the system frequency is quickly supported.
As shown in fig. 5, in one embodiment, the controlling the converter dc input or output voltage of the energy storage system according to the control target value includes:
s502: acquiring the actual direct-current voltage value of each converter of the energy storage system;
specifically, the energy storage system control device obtains a control target value of the energy storage system according to the actual value of the active power and the active power adjustment target. The energy storage system control device obtains the actual direct-current voltage value of each converter of the energy storage system.
S504: and obtaining the direct current input or output voltage value of the converter according to the actual value and the control target value of the direct current voltage.
Specifically, the energy storage system control device obtains a direct current voltage actual value of each converter of the energy storage system, and the energy storage system control device obtains a control target value of the energy storage system according to the active power actual value and the active power regulation target, so as to obtain a direct current input or output voltage value of the converter.
In this embodiment, the energy storage system control device obtains the actual dc voltage value of each converter of the energy storage system, and obtains the dc input or output voltage value of the converter according to the actual dc voltage value and the control target value. And dividing the functional stages of the energy storage system according to the system frequency, responding to automatic gain control AGC in the emergency frequency modulation stage, and adjusting the requirement to carry out rapid active power control.
As shown in fig. 6, in one embodiment, when the regulation interval in which the current frequency value is located is a dynamic frequency modulation interval, the adjusting the storage capacity of the energy storage system includes:
s602: and acquiring a load threshold of the power grid system.
Specifically, when the system frequency is in the interval III which is a dynamic frequency modulation interval, the energy storage system adjusts the storage capacity of the energy storage system, so that the energy storage system is ensured to have enough adjustable capacity under the dynamic frequency modulation condition. The adjustment mode is that the energy storage system control device firstly obtains the load threshold of the power grid system.
S604: acquiring an upper limit and a lower limit of the storage capacity of the energy storage system;
specifically, when the system frequency is in the interval iii, which is a dynamic frequency modulation capability adjustment stage, the energy storage system control device performs steady-state dynamic frequency modulation capability control. The energy storage system control device obtains a load threshold value of a power grid system and obtains an upper limit and a lower limit of the storage capacity of the energy storage system. The energy storage system control device controls the storage capacity of the energy storage system within the set upper limit and lower limit according to the load condition of the current system.
S606: when the load of the power grid system exceeds the load threshold of the power grid system, controlling the storage capacity of the energy storage system to be at the upper limit; and controlling the storage capacity of the energy storage system to be at a lower limit when the load of the power grid system is lower than the load threshold of the power grid system.
Specifically, when the system frequency is in the interval iii, which is a dynamic frequency modulation capability adjustment stage, the energy storage system control device performs steady-state dynamic frequency modulation capability control. When the system load exceeds a set threshold value, the energy storage system control device controls the storage capacity of the energy storage system to be at the upper limit of a set range; and when the system load is smaller than the set threshold value, the energy storage system control device controls the storage capacity of the energy storage system to be at the lower limit of the set range.
In this embodiment, the energy storage system control device obtains a grid system load threshold value and an upper limit and a lower limit of the storage capacity, the grid system load exceeds the grid system load threshold value, and the storage capacity of the energy storage system is controlled to be at the upper limit; and controlling the storage capacity of the energy storage system to be at a lower limit when the load of the power grid system is lower than the load threshold of the power grid system. The energy storage system control device controls the storage capacity of the energy storage system according to the system load condition, so that the energy storage system has enough dynamic frequency modulation capability, the frequency modulation potential of the energy storage system is improved, and the adjustment capability of the power system under the condition of the emergency change of the power grid frequency is further enhanced.
As shown in fig. 7, in one embodiment, when the regulation interval in which the current frequency value is located is a dynamic frequency modulation interval, the adjusting the storage capacity of the energy storage system further includes:
s702: discharging when the current storage capacity of the energy storage system is larger than the upper limit;
specifically, after the storage capacity of the energy storage system is controlled and set, the set storage capacity is used as an adjustment target and is subjected to PID control with the actual storage capacity of the energy storage system, a PID control result is used as a direct current voltage control target, each energy storage converter collects a direct current voltage actual value and compares the direct current voltage actual value with a target value, PID control is performed to adjust direct current output voltage, therefore, the storage capacity tracks the target value, and if the current storage capacity of the energy storage system is larger than a set value, discharging is performed.
S704: and if the current storage capacity of the energy storage system is smaller than the lower limit, charging.
Specifically, after the storage capacity of the energy storage system is controlled and set, the set storage capacity is used as an adjustment target and is subjected to PID control with the actual storage capacity of the energy storage system, a PID control result is used as a direct current voltage control target, each energy storage converter collects a direct current voltage actual value and compares the direct current voltage actual value with a target value, PID control is performed to adjust direct current output voltage, therefore, the storage capacity tracks the target value, and if the current storage capacity of the energy storage system is smaller than a set value, charging is performed. The frequency modulation potential of the energy storage system is further improved, the adjusting capacity of the power system under the condition of the emergency change of the power grid frequency is enhanced, and the stability of the system is enhanced.
In this embodiment, when the regulation interval in which the current frequency value is located is the dynamic frequency modulation interval, the storage capacity of the energy storage system is adjusted. Discharging when the current storage capacity of the energy storage system is larger than the upper limit; and if the current storage capacity of the energy storage system is smaller than the lower limit, charging.
It should be understood that, although the steps in the flowcharts of fig. 2 to 7 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps of fig. 2-7 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, there is provided an energy storage system control apparatus including:
the acquisition module is used for acquiring the current frequency value of the power grid system;
the analysis module is used for determining the regulation and control interval where the current frequency value is located;
and the control module is used for controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
In one embodiment, the energy storage system control device controls the energy storage system according to a control logic corresponding to the regulation and control interval, and includes:
the active power control module is used for controlling the active power of the energy storage system when the regulation interval in which the current frequency value is located is an active power control interval;
and the storage capacity adjusting module is used for adjusting the storage capacity of the energy storage system when the regulation and control interval in which the current frequency value is located is the dynamic frequency modulation interval.
In an embodiment, the automatic gain control module is configured to perform active power control on the energy storage system when the regulation interval in which the current frequency value is located is an active power control interval, and respond to an adjustment command of the automatic gain control.
In one embodiment, responding to an adjustment command for automatic gain control comprises:
the acquisition module is used for acquiring an active power actual value of the energy storage system;
the obtaining module is used for obtaining an active power regulation target of the energy storage system;
the control target value module is used for obtaining a control target value of the energy storage system according to the actual value of the active power and the active power regulation target;
and the converter control module is used for controlling the converter direct-current input or output voltage of the energy storage system according to the control target value.
In one embodiment, controlling converter dc input or output voltage of an energy storage system according to a control target value includes:
the acquisition module is used for acquiring the actual direct-current voltage value of each converter of the energy storage system;
and the input or output voltage value module is used for obtaining the direct current input or output voltage value of the converter according to the actual direct current voltage value and the control target value.
In one embodiment, when the regulation interval in which the current frequency value is located is a dynamic frequency modulation interval, adjusting the storage capacity of the energy storage system includes:
the acquisition module is used for acquiring a load threshold of the power grid system; acquiring the upper limit and the lower limit of the storage capacity of the energy storage system;
the storage capacity control module is used for controlling the storage capacity of the energy storage system to be at an upper limit when the load of the power grid system exceeds a load threshold of the power grid system; and controlling the storage capacity of the energy storage system to be at a lower limit when the load of the power grid system is lower than the load threshold of the power grid system.
In one embodiment, when the regulation and control interval in which the current frequency value is located is a dynamic frequency modulation interval, the method adjusts the storage capacity of the energy storage system, and further includes:
the discharging module is used for discharging when the current storage capacity of the energy storage system is larger than the upper limit;
and the charging module is used for charging when the current storage capacity of the energy storage system is smaller than the lower limit.
For specific limitations of the energy storage system control device, reference may be made to the above limitations of the energy storage system control method, which are not described herein again. The modules in the energy storage system control device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 8. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing periodic task allocation data, such as configuration files, theoretical operating parameters and theoretical deviation value ranges, task attribute information and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement an energy storage system control method.
Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, there is provided a computer device comprising a memory storing a computer program and a processor implementing the following steps when the processor executes the computer program:
acquiring a current frequency value of a power grid system;
determining a regulation and control interval where the current frequency value is;
and controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
In one embodiment, when the processor executes the computer program, the control of the energy storage system according to the control logic corresponding to the control interval is implemented, and includes:
when the regulation interval in which the current frequency value is located is an active power control interval, performing active power control on the energy storage system;
and when the regulation interval in which the current frequency value is located is the dynamic frequency modulation interval, regulating the storage capacity of the energy storage system.
In one embodiment, the processor executes the computer program to perform active power control on the energy storage system when the regulation interval in which the current frequency value is located is an active power control interval, and respond to the regulation command of the automatic gain control.
In one embodiment, a processor, when executing a computer program, implements adjustment commands responsive to automatic gain control, comprising:
acquiring an active power actual value of an energy storage system;
obtaining an active power regulation target of an energy storage system;
obtaining a control target value of the energy storage system according to the actual value of the active power and the active power regulation target;
and controlling the converter direct-current input or output voltage of the energy storage system according to the control target value.
In one embodiment, the processor, when executing the computer program, implements control of a converter dc input or output voltage of the energy storage system according to a control target value, comprising:
acquiring the actual direct-current voltage value of each converter of the energy storage system;
and obtaining the direct current input or output voltage value of the converter according to the actual value and the control target value of the direct current voltage.
In one embodiment, when the processor executes the computer program, the processor adjusts the storage capacity of the energy storage system when the regulation interval in which the current frequency value is located is the dynamic frequency modulation interval, including:
acquiring a load threshold of a power grid system;
acquiring an upper limit and a lower limit of the storage capacity of the energy storage system;
when the load of the power grid system exceeds the load threshold of the power grid system, controlling the storage capacity of the energy storage system to be at the upper limit; and controlling the storage capacity of the energy storage system to be at a lower limit when the load of the power grid system is lower than the load threshold of the power grid system.
In one embodiment, when the processor executes the computer program, the storage capacity of the energy storage system is adjusted when the regulation and control interval in which the current frequency value is located is the dynamic frequency modulation interval, and the method further includes:
discharging when the current storage capacity of the energy storage system is larger than the upper limit;
and if the current storage capacity of the energy storage system is smaller than the lower limit, charging.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring a current frequency value of a power grid system;
determining a regulation and control interval where the current frequency value is;
and controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
In one embodiment, when executed by the processor, the computer program implements control of the energy storage system according to control logic corresponding to the regulation and control interval, including:
when the regulation interval in which the current frequency value is located is an active power control interval, performing active power control on the energy storage system;
and when the regulation interval in which the current frequency value is located is the dynamic frequency modulation interval, regulating the storage capacity of the energy storage system.
In one embodiment, the computer program is executed by the processor to perform active power control on the energy storage system when the regulation interval in which the current frequency value is located is an active power control interval, and respond to the regulation command of the automatic gain control.
In one embodiment, a computer program that when executed by a processor implements adjustment commands responsive to automatic gain control, comprises:
acquiring an active power actual value of an energy storage system;
obtaining an active power regulation target of an energy storage system;
obtaining a control target value of the energy storage system according to the actual value of the active power and the active power regulation target;
and controlling the converter direct-current input or output voltage of the energy storage system according to the control target value.
In one embodiment, a computer program, when executed by a processor, implements controlling a converter dc input or output voltage of an energy storage system in accordance with a control target value, comprising:
acquiring the actual direct-current voltage value of each converter of the energy storage system;
and obtaining the direct current input or output voltage value of the converter according to the actual value and the control target value of the direct current voltage.
In one embodiment, the computer program, when executed by the processor, is configured to adjust the storage capacity of the energy storage system when the regulation interval in which the current frequency value is located is a dynamic frequency regulation interval, including:
acquiring a load threshold of a power grid system;
acquiring an upper limit and a lower limit of the storage capacity of the energy storage system;
when the load of the power grid system exceeds the load threshold of the power grid system, controlling the storage capacity of the energy storage system to be at the upper limit; and controlling the storage capacity of the energy storage system to be at a lower limit when the load of the power grid system is lower than the load threshold of the power grid system.
In one embodiment, when executed by a processor, the computer program is configured to adjust the storage capacity of the energy storage system when the regulation interval in which the current frequency value is located is a dynamic frequency regulation interval, and further includes:
discharging when the current storage capacity of the energy storage system is larger than the upper limit;
and if the current storage capacity of the energy storage system is smaller than the lower limit, charging.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments may be arbitrarily coupled, and for the sake of brevity, all possible couplings of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the couplings of the technical features, the technical features should be considered as the scope of the present description.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An energy storage system control method, characterized by comprising:
acquiring a current frequency value of a power grid system;
determining a regulation and control interval where the current frequency value is located;
and controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
2. The method according to claim 1, wherein the controlling the energy storage system according to the control logic corresponding to the regulation and control interval comprises:
when the regulation interval in which the current frequency value is located is an active power control interval, performing active power control on the energy storage system;
and when the regulation and control interval in which the current frequency value is located is a dynamic frequency modulation interval, regulating the storage capacity of the energy storage system.
3. The energy storage system control method according to claim 2, wherein when the regulation interval in which the current frequency value is located is an active power control interval, the energy storage system is subjected to active power control, and an adjustment command of automatic gain control is responded.
4. The energy storage system control method of claim 3, wherein the responding to the adjustment command of the automatic gain control comprises:
acquiring an active power actual value of the energy storage system;
obtaining an active power regulation target of the energy storage system;
obtaining a control target value of the energy storage system according to the actual value of the active power and the active power regulation target;
and controlling the converter direct-current input or output voltage of the energy storage system according to the control target value.
5. The energy storage system control method according to claim 4, wherein the controlling of the converter DC input or output voltage of the energy storage system according to the control target value comprises:
acquiring the actual value of the direct-current voltage of each converter of the energy storage system;
and obtaining the direct current input or output voltage value of the converter according to the actual direct current voltage value and the control target value.
6. The method according to claim 2, wherein when the modulation interval in which the current frequency value is located is a dynamic frequency modulation interval, adjusting the storage capacity of the energy storage system comprises:
acquiring a load threshold value of the power grid system;
acquiring an upper limit and a lower limit of the storage capacity of the energy storage system;
controlling the storage capacity of the energy storage system to be at the upper limit when the grid system load exceeds the grid system load threshold; and controlling the storage capacity of the energy storage system at the lower limit when the load of the power grid system is lower than the load threshold of the power grid system.
7. The method according to claim 6, wherein when the modulation interval in which the current frequency value is located is a dynamic frequency modulation interval, the storage capacity of the energy storage system is adjusted, further comprising:
discharging when the current storage capacity of the energy storage system is larger than the upper limit;
and if the current storage capacity of the energy storage system is smaller than the lower limit, charging.
8. An energy storage system control apparatus, characterized by comprising:
the acquisition module is used for acquiring the current frequency value of the power grid system;
the analysis module is used for determining a regulation and control interval where the current frequency value is located;
and the control module is used for controlling the energy storage system according to the control logic corresponding to the regulation and control interval.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 7.
10. A computer storage medium on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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