CN115036942A - Hybrid energy storage VSG frequency oscillation suppression method and device - Google Patents

Hybrid energy storage VSG frequency oscillation suppression method and device Download PDF

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CN115036942A
CN115036942A CN202210957935.3A CN202210957935A CN115036942A CN 115036942 A CN115036942 A CN 115036942A CN 202210957935 A CN202210957935 A CN 202210957935A CN 115036942 A CN115036942 A CN 115036942A
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virtual
vsg
energy storage
hybrid energy
representing
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Inventor
杨沛豪
孙钢虎
兀鹏越
谭龙胜
王小辉
寇水潮
高峰
梁舒婷
庞顺
贺婷
薛晓峰
林怡玢
王冰礁
葛传军
常云潇
王仪杭
张晨曦
查天智
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Xian Thermal Power Research Institute Co Ltd
Huaneng Luoyuan Power Generation Co Ltd
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Xian Thermal Power Research Institute Co Ltd
Huaneng Luoyuan Power Generation Co Ltd
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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
    • H02J3/241—The oscillation concerning frequency
    • 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
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Power Engineering (AREA)
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Abstract

The application discloses hybrid energy storage VSG frequency oscillation suppression method and device, wherein the method comprises the following steps: and constructing a first hybrid energy storage VSG rotor mechanical equation, wherein the first hybrid energy storage VSG rotor mechanical equation comprises a virtual damping coefficient, constructing a self-adaptive virtual damping coefficient based on the load sudden change condition, expressing the virtual damping coefficient by using the self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation, and applying the second hybrid energy storage VSG rotor mechanical equation to a hybrid energy storage VSG control system to execute a VSG virtual angular frequency suppression function. The method and the device effectively restrain the frequency oscillation of the power grid.

Description

Hybrid energy storage VSG frequency oscillation suppression method and device
Technical Field
The present application relates to the field of hybrid energy storage, and in particular, to a method and an apparatus for suppressing VSG frequency oscillation in hybrid energy storage, an electronic device, and a computer-readable storage medium.
Background
The large-scale energy storage technology serving as one of key technical supports of energy transformation in China has attracted extensive attention in the industry in recent years because the large-scale energy storage technology can provide various auxiliary services such as peak shaving, frequency modulation, emergency response and the like for a power grid. The distributed hybrid energy storage system consists of a storage battery and a super capacitor, is connected with a power grid through a current converter, has power bidirectional flow capacity, and has the advantages of rapid power regulation, various application modes and the like. In a hybrid energy storage system, a storage battery has the characteristic of high energy density but is not suitable for frequent charging and discharging, and a super capacitor has the advantage of high power density.
The distributed hybrid energy storage system has the influence on the frequency stability of the network side due to the low inertia and low damping characteristic. In order to make the energy storage converter control system have the rotational inertia and damping as the Synchronous generator has, a Virtual Synchronous Generator (VSG) control technology is widely adopted, so that the VSG control technology participates in the regulation of the grid frequency and voltage as the Synchronous generator.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the application aims to solve the application problem of the VSG control technology in the hybrid energy storage system, and provides a hybrid energy storage VSG frequency oscillation suppression method, a hybrid energy storage VSG frequency oscillation suppression device, an electronic device and a computer-readable storage medium.
In order to achieve the above object, a first aspect of the present application provides a method for suppressing VSG frequency oscillation of a hybrid energy storage, including the following steps:
constructing a first hybrid energy storage VSG rotor mechanical equation, wherein the first hybrid energy storage VSG rotor mechanical equation comprises a virtual damping coefficient;
constructing a self-adaptive virtual damping coefficient based on the load sudden change condition;
expressing the virtual damping coefficient by using the self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation;
and applying the second hybrid energy storage VSG rotor mechanical equation to a hybrid energy storage VSG control system to execute a VSG virtual angular frequency suppression function.
In one possible embodiment, the constructing the first hybrid energy storage VSG rotor mechanical equation comprises:
Figure 615266DEST_PATH_IMAGE001
wherein,Hrepresenting virtual moment of inertia, ω representing virtual angular frequency, ω 0 Indicating nominal angular frequency, T m Representing VSG mechanical torque, T e Representing electromagnetic torque, P ref Representing the active power reference value, P e Representing virtual electromagnetic power, T m Is approximately equal to
Figure 732126DEST_PATH_IMAGE002
，T e Is approximately equal to
Figure DEST_PATH_IMAGE003
，DRepresents the adaptive virtual damping coefficient and is,P m to be virtual mechanical power, δ represents a virtual power angle, and t represents time.
In a possible implementation, the constructing an adaptive virtual damping coefficient based on the load sudden change condition includes:
dividing the hybrid energy storage output power into a power increasing working condition and a power decreasing working condition according to the load sudden change condition;
dividing a stage that the change rate of the virtual angular frequency is greater than zero and a stage that the change rate of the virtual angular frequency is less than zero according to the change rate of the virtual angular frequency;
and constructing the self-adaptive virtual damping coefficient according to the power increasing working condition, the power decreasing working condition, the stage that the virtual angular frequency change rate is greater than zero and the stage that the virtual angular frequency change rate is less than zero.
In a possible embodiment, the constructing the adaptive virtual damping coefficient according to the power increasing condition and the power decreasing condition, the phase in which the virtual angular frequency change rate is greater than zero, and the phase in which the virtual angular frequency change rate is less than zero includes:
Figure 161970DEST_PATH_IMAGE004
wherein,Drepresenting the adaptive virtual damping coefficient and,D 0 representing the nominal virtual damping coefficient, k D Representing the virtual damping adaptation coefficient, k Dmax The maximum adjustment multiple of the virtual damping is shown,
Figure DEST_PATH_IMAGE005
represents a virtual angular frequency deviation, and M represents a virtual angular frequency deviation threshold.
The application provides in a second aspect a hybrid energy storage VSG frequency oscillation suppression device, including:
a first construction module for constructing a first hybrid energy storage VSG rotor mechanical equation, wherein the first hybrid energy storage VSG rotor mechanical equation includes a virtual damping coefficient;
the second construction module is used for constructing the self-adaptive virtual damping coefficient based on the sudden load change condition;
the representing module is used for representing the virtual damping coefficient by the self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation;
and the application module is used for applying the second hybrid energy storage VSG rotor mechanical equation to a hybrid energy storage VSG control system and executing a VSG virtual angular frequency suppression function.
In one possible embodiment, the first building block comprises:
Figure 403596DEST_PATH_IMAGE006
wherein,Hrepresenting virtual moment of inertia, ω representing virtual angular frequency, ω 0 Indicating nominal angular frequency, T m Representing VSG mechanical torque, T e Representing electromagnetic torque, P ref Representing the active power reference value, P e Representing virtual electromagnetic power, T m Is approximately equal to
Figure DEST_PATH_IMAGE007
，T e Is approximately equal to
Figure 147561DEST_PATH_IMAGE008
，DRepresenting the adaptive virtual damping coefficient and,P m to be virtual mechanical power, δ represents a virtual power angle, and t represents time.
In a possible embodiment, the second building block comprises:
the first dividing unit is used for dividing the hybrid energy storage output power into a power increasing working condition and a power decreasing working condition according to the load sudden change condition;
the second dividing unit is used for dividing a stage in which the change rate of the virtual angular frequency is greater than zero and a stage in which the change rate of the virtual angular frequency is less than zero according to the change rate of the virtual angular frequency;
and the construction unit is used for constructing the self-adaptive virtual damping coefficient according to the power increasing working condition and the power decreasing working condition, the stage that the virtual angular frequency change rate is greater than zero and the stage that the virtual angular frequency change rate is less than zero.
In a possible embodiment, the construction unit comprises:
Figure DEST_PATH_IMAGE009
wherein,Drepresenting the adaptive virtual damping coefficient and,D 0 representing the nominal virtual damping coefficient, k D Representing the virtual damping adaptation coefficient, k Dmax The maximum adjustment multiple of the virtual damping is shown,
Figure 791032DEST_PATH_IMAGE010
denotes a virtual angular frequency deviation, and M denotes a virtual angular frequency deviation threshold.
According to a third aspect of embodiments of the present application, there is provided an electronic apparatus, including:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the hybrid energy storage VSG frequency oscillation suppression method of any of the first aspect.
According to a fourth aspect of embodiments of the present application, there is provided a storage medium, wherein instructions that, when executed by a processor of an electronic device, enable the electronic device to perform the hybrid energy storage VSG frequency oscillation suppression method according to any one of the first aspects.
According to a fifth aspect of embodiments herein, there is provided a computer program product comprising a computer program which, when executed by a processor, implements the hybrid energy storage VSG frequency oscillation suppression method according to any of the first aspects.
The beneficial effect of this application:
according to the embodiment of the application, the VSG control strategy based on the self-adaptive virtual damping coefficient is adopted in the hybrid energy storage system, so that the frequency oscillation of a power grid can be effectively inhibited through reasonably controlling the virtual damping coefficient.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a hybrid energy storage microgrid topology in the prior art;
fig. 2 is a flow chart of a hybrid energy storage VSG frequency oscillation suppression method according to an embodiment of the present application;
fig. 3 is a hybrid energy storage DC/AC converter topology and VSG control flow diagram according to an embodiment of the present application;
fig. 4 is a schematic diagram of a VSG active and virtual angular frequency variation curve according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a hybrid energy storage VSG frequency oscillation suppression device according to an embodiment of the present application;
fig. 6 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.
Before describing the hybrid energy storage VSG frequency oscillation suppression method according to the embodiment of the present application, a hybrid energy storage microgrid topology is first described with reference to fig. 1.
Fig. 1 is a schematic diagram of a hybrid energy storage microgrid topology in the prior art, wherein distributed power supply points pass through as shown in fig. 1
Figure DEST_PATH_IMAGE011
The (DC-DC) converter is connected to the DC bus because of its active power outputP DG The fluctuation of the energy storage device is required to be configured with a hybrid energy storage device consisting of a storage battery and a super capacitor, and the active power of the storage battery is regulatedP B Active power of super capacitorP C To stabilizeP DG Fluctuating. When the frequency oscillation accident occurs in the AC large power grid, the power oscillation signal passes through
Figure 126198DEST_PATH_IMAGE012
The (ac-to-dc) converter is required to have a frequency oscillation suppression capability when it is transmitted to the dc side.
The hybrid energy storage VSG frequency oscillation suppression method, the apparatus, the electronic device, and the computer-readable storage medium proposed according to the embodiments of the present application are described below with reference to the drawings, and first, the hybrid energy storage VSG frequency oscillation suppression method proposed according to the embodiments of the present application will be described with reference to the drawings.
Fig. 2 is a flowchart of a hybrid energy storage VSG frequency oscillation suppression method according to an embodiment of the present application.
As shown in fig. 2, the method for suppressing the VSG frequency oscillation of the hybrid energy storage includes the following steps:
step S110, constructing a first hybrid energy storage VSG rotor mechanical equation, wherein the first hybrid energy storage VSG rotor mechanical equation comprises a virtual damping coefficient.
In an embodiment of the present application, a first hybrid energy storage VSG rotor mechanical equation may be constructed, which may be a hybrid energy storage VSG rotor mechanical equation including a virtual damping coefficient.
The mechanical equation of the hybrid energy storage VSG rotor is explained in conjunction with FIG. 3. Fig. 3 is a hybrid energy storage DC/AC converter topology and VSG control flow diagram according to an embodiment of the present application.
As shown in FIG. 3, A, B and C each represent a three-phase circuit, N represents the circuit neutral point, C f Represents a filter capacitance;U dc is a dc bus voltage;U abc 、i abc three-phase voltage and current at the alternating current side of the hybrid energy storage DC/AC converter are obtained;e abc three-phase voltage of an alternating current power grid;R f 、L f 、L g 、R g a filter circuit is formed. In the control flow of the VSG,ɷis the virtual angular frequency;δis a virtual power angle;P ref is an active power reference value;P e for virtual electromagnetic power, the VSG has no stator winding losses,P e also known as VSG controls output power;P m is virtual mechanical power;uis a virtual internal potential in the VSG;Q e the actual output value of the reactive power is obtained;Q ref is a reactive power reference value. The first hybrid energy storage VSG rotor mechanical equation may be a joint equation of the rate of change of the virtual angular frequency with time and the rate of change of the virtual power angle with time, as follows:
Figure 855120DEST_PATH_IMAGE013
wherein,Hrepresenting virtual moment of inertia, ω representing virtual angular frequency, ω 0 Indicating nominal angular frequency, T m Representing VSG mechanical torque, T e Representing electromagnetic torque, P ref Representing the active power reference value, P e Representing virtual electromagnetic power, T m Is approximately equal to
Figure 788396DEST_PATH_IMAGE014
，T e Is approximately equal to
Figure 286374DEST_PATH_IMAGE015
，DRepresenting the adaptive virtual damping coefficient and,P m to be virtual mechanical power, δ represents a virtual power angle, and t represents time.
And step S120, constructing an adaptive virtual damping coefficient based on the load sudden change condition.
In the embodiment of the application, the adaptive virtual damping coefficient can be constructed based on the load sudden change condition, and can be adaptively adjusted according to the load change condition.
It should be noted that the load mutation situation can be analyzed by fig. 4. Fig. 4 is a schematic diagram of a VSG active and virtual angular frequency variation curve according to an embodiment of the present application.
As shown in fig. 4, when a sudden load disturbance occurs, the VSG virtual angular frequency oscillates at the moment of the disturbance. When the output power of the hybrid energy storage is increased (stages a and b), the virtual angular frequency change rate of the stage a
Figure 58020DEST_PATH_IMAGE016
Suddenly increased from 0, fallen back in a very short time int 2 Time of dayɷReaches a maximum value at which point
Figure 8659DEST_PATH_IMAGE017
Whole a phase hold
Figure 891164DEST_PATH_IMAGE018
(ii) a Stage bɷIs continuously reduced when
Figure 712490DEST_PATH_IMAGE019
In a similar manner to the phase a,
Figure 655038DEST_PATH_IMAGE020
also increased and then decreased, i.e.ɷThe reduction process is accelerated and then decelerated toɷ 0 The process of (1). When the output power of the hybrid energy storage is continuously reduced (c and d stages), wherein the c stage virtual angular frequency change rate
Figure 92973DEST_PATH_IMAGE021
In at 4 Time of dayɷReaching a minimum value; rate of change of d-phase virtual angular frequency
Figure 513590DEST_PATH_IMAGE022
Finally the virtual angular frequency is stabilized at the nominal angular frequencyɷ 0 。
In order to enable the hybrid energy storage VSG control system to respond to the virtual angular frequency increase rapidly in the stage a, the adaptive control strategy reduces the virtual damping in the stageDFurthermore, in order to suppress the overshoot of the virtual angular frequency, the method needs to be applied toɷWhen the maximum value is reached, pairɷAre subject to a limit value, i.e. att 2 Time of day, virtual dampingDThe maximum adjustment in the forward direction is reached. In the virtual angular frequency reduction phase (b phase), in order to make the hybrid energy storage VSG control system respond rapidlyɷReduction, reducing overshoot at near nominal angular frequency, requires adaptive reduction of virtual dampingDFurther, in order to suppress the decrease of the virtual angular frequency to the destabilization region, inɷTo a minimum, i.e.t 4 Time of day, virtual dampingDThe reverse maximum adjustment is reached.
In the analysis of the load sudden change condition, the working conditions of the stages a and b belong to a power increasing working condition, the working conditions of the stages c and d belong to a power decreasing working condition, the virtual angular frequency change rates of the stages a and d belong to a stage in which the virtual angular frequency change rate is greater than zero, and the virtual angular frequency change rates of the stages b and c belong to a stage in which the virtual angular frequency change rate is less than zero.
According to the analysis of the load sudden change situation, the adaptive virtual damping coefficient can be expressed as follows:
Figure 986159DEST_PATH_IMAGE023
wherein,Drepresenting the adaptive virtual damping coefficient and,D 0 representing the nominal virtual damping coefficient, k D Representing the virtual damping adaptation coefficient, k Dmax The maximum adjustment multiple of the virtual damping is shown,
Figure 99609DEST_PATH_IMAGE024
denotes a virtual angular frequency deviation, and M denotes a virtual angular frequency deviation threshold.
And step S130, expressing the virtual damping coefficient by using a self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation.
In the embodiment of the present application, after obtaining the first hybrid energy storage VSG rotor mechanical equation and the adaptive virtual damping coefficient, the virtual damping coefficient may be expressed by using the adaptive virtual damping coefficient, and the second hybrid energy storage VSG rotor mechanical equation may be obtained, that is, the second hybrid energy storage VSG rotor mechanical equation may be a hybrid energy storage VSG rotor mechanical equation including the adaptive virtual damping coefficient.
And step S140, applying a second hybrid energy storage VSG rotor mechanical equation to a hybrid energy storage VSG control system, and executing a VSG virtual angular frequency suppression function.
In this embodiment of the application, after the second hybrid energy storage VSG rotor mechanical equation is obtained, the second hybrid energy storage VSG rotor mechanical equation may be applied to the hybrid energy storage VSG control system to perform a VSG virtual angular frequency suppression function.
It should be noted that when
Figure 618315DEST_PATH_IMAGE025
，DAdaptive reduction, fast responseɷIncrease/decrease; when in use
Figure 842623DEST_PATH_IMAGE026
，DFast increase limitɷIt can be prevented from entering the destabilization region.
Through the steps, a first hybrid energy storage VSG rotor mechanical equation is constructed, wherein the first hybrid energy storage VSG rotor mechanical equation comprises a virtual damping coefficient, a self-adaptive virtual damping coefficient is constructed based on the load sudden change condition, the virtual damping coefficient is expressed by the self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation, and the second hybrid energy storage VSG rotor mechanical equation is applied to a hybrid energy storage VSG control system to execute a VSG virtual angular frequency suppression function. The method and the device effectively restrain the frequency oscillation of the power grid.
In order to implement the foregoing embodiment, as shown in fig. 5, this embodiment further provides a hybrid energy storage VSG frequency oscillation suppression method apparatus 500, where the apparatus 500 includes: a first construction module 510, a second construction module 520, a representation module 530, and an application module 540.
A first construction module 510 for constructing a first hybrid energy storage VSG rotor mechanical equation, wherein the first hybrid energy storage VSG rotor mechanical equation comprises a virtual damping coefficient;
a second constructing module 520, configured to construct an adaptive virtual damping coefficient based on a load sudden change condition;
the representing module 530 is configured to represent the virtual damping coefficient by using a self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation;
and an applying module 540, configured to apply the second hybrid energy storage VSG rotor mechanical equation to the hybrid energy storage VSG control system, and execute a VSG virtual angular frequency suppression function.
In one possible implementation, the first construction module 510 includes:
Figure 904120DEST_PATH_IMAGE013
wherein,Hrepresenting virtual moment of inertia, ω representing virtual angular frequency, ω 0 Indicating nominal angular frequency, T m Representing VSG mechanical torque, T e Representing electromagnetic torque, P ref Representing the active power reference value, P e Representing virtual electromagnetic power, T m Is approximately equal to
Figure 188470DEST_PATH_IMAGE027
，T e Is approximately equal to
Figure 600997DEST_PATH_IMAGE008
，DRepresenting the adaptive virtual damping coefficient and,P m to be virtual mechanical power, δ represents a virtual power angle, and t represents time.
In one possible embodiment, the second construction module 520 includes:
the first dividing unit 521 is configured to divide the hybrid energy storage output power into a power increase condition and a power decrease condition according to a load sudden change condition;
a second dividing unit 522, configured to divide a stage in which the change rate of the virtual angular frequency is greater than zero and a stage in which the change rate of the virtual angular frequency is less than zero according to the change rate of the virtual angular frequency;
the constructing unit 523 is configured to construct an adaptive virtual damping coefficient according to the power increasing condition and the power decreasing condition, the stage in which the virtual angular frequency change rate is greater than zero, and the stage in which the virtual angular frequency change rate is less than zero.
In a possible embodiment, the unit 523 is configured to include:
Figure 628996DEST_PATH_IMAGE028
wherein,Drepresents the adaptive virtual damping coefficient and is,D 0 representing the nominal virtual damping coefficient, k D Representing the virtual damping adaptation coefficient, k Dmax The maximum adjustment multiple of the virtual damping is shown,
Figure 279420DEST_PATH_IMAGE029
represents a virtual angular frequency deviation, and M represents a virtual angular frequency deviation threshold.
According to the hybrid energy storage VSG frequency oscillation suppression device, a first hybrid energy storage VSG rotor mechanical equation is constructed, wherein the first hybrid energy storage VSG rotor mechanical equation comprises a virtual damping coefficient, an adaptive virtual damping coefficient is constructed based on the condition of sudden load change, the virtual damping coefficient is represented by the adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation, and the second hybrid energy storage VSG rotor mechanical equation is applied to a hybrid energy storage VSG control system to execute a VSG virtual angular frequency suppression function. The method and the device effectively restrain the frequency oscillation of the power grid.
It should be noted that the foregoing explanation of the embodiment of the hybrid energy storage VSG frequency oscillation suppression method is also applicable to the hybrid energy storage VSG frequency oscillation suppression device of the embodiment, and is not repeated herein.
There is also provided, in accordance with an embodiment of the present application, an electronic device, a computer-readable storage medium, and a computer program product.
FIG. 6 illustrates a schematic block diagram of an example electronic device 600 that can be used to implement embodiments of the present application. The electronic device 600 is 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 processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit implementations of the disclosure described and/or claimed herein.
As shown in fig. 6, the electronic device 600 includes a computing unit 601, which can perform various appropriate actions and processes according to a computer program stored in a Read Only Memory (ROM) 602 or a computer program loaded from a storage unit 608 into a Random Access Memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the device 600 can also be stored. The calculation unit 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input-output interface 605 is also connected to bus 604.
A plurality of components in the electronic device 600 are connected to the input-output interface 605, including: an input unit 606 such as a keyboard, a mouse, or the like; an output unit 607 such as various types of displays, speakers, and the like; a storage unit 608, such as a magnetic disk, optical disk, or the like; and a communication unit 609 such as a network card, modem, wireless communication transceiver, etc. The communication unit 609 allows the electronic device 600 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The computing unit 601 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of the computing unit 601 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various dedicated Artificial Intelligence (AI) computing chips, various computing units running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, and so forth. The calculation unit 601 performs the various methods and processes described above, such as the hybrid energy storage VSG frequency oscillation suppression method. For example, in some embodiments, the hybrid tank VSG frequency oscillation suppression method may be implemented as a computer software program tangibly embodied in a machine-readable medium, such as the storage unit 608. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 600 via the ROM 602 and/or the communication unit 609. When the computer program is loaded into the RAM 603 and executed by the computing unit 601, one or more steps of the hybrid energy storage VSG frequency oscillation suppression method described above may be performed. Alternatively, in other embodiments, the calculation unit 601 may be configured to perform the hybrid tank VSG frequency oscillation suppression method in any other suitable manner (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.
Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a computer-readable storage medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may be a machine readable signal medium or a machine readable storage medium. 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. More specific examples of a computer-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 portable 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 a computer 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 computer. 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), the internet, and blockchain networks.
The computer 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 as to solve the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service ("Virtual Private Server", or simply "VPS"). The server may also be a server of a distributed system, or a server incorporating a blockchain.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A hybrid energy storage VSG frequency oscillation suppression method is characterized by comprising the following steps:
constructing a first hybrid energy storage VSG rotor mechanical equation, wherein the first hybrid energy storage VSG rotor mechanical equation comprises a virtual damping coefficient;
constructing a self-adaptive virtual damping coefficient based on the load sudden change condition;
expressing the virtual damping coefficient by using the self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation;
and applying the second hybrid energy storage VSG rotor mechanical equation to a hybrid energy storage VSG control system to execute a VSG virtual angular frequency suppression function.
2. The method of claim 1 wherein the constructing a first hybrid energy storage VSG rotor mechanical equation comprises:
Figure 295295DEST_PATH_IMAGE001
wherein,Hrepresenting virtual moment of inertia, ω representing virtual angular frequency, ω 0 Indicating nominal angular frequency, T m Representing VSG mechanical torque, T e Representing electromagnetic torque, P ref Representing the active power reference value, P e Representing virtual electromagnetic power, T m Is approximately equal to
Figure 75033DEST_PATH_IMAGE002
，T e Is approximately equal to
Figure 470242DEST_PATH_IMAGE003
，DRepresenting the adaptive virtual damping coefficient and,P m to be virtual mechanical power, δ represents a virtual power angle, and t represents time.
3. The method of claim 1, wherein constructing an adaptive virtual damping coefficient based on the sudden load change condition comprises:
dividing the hybrid energy storage output power into a power increasing working condition and a power decreasing working condition according to the load sudden change condition;
dividing a stage that the change rate of the virtual angular frequency is greater than zero and a stage that the change rate of the virtual angular frequency is less than zero according to the change rate of the virtual angular frequency;
and constructing the self-adaptive virtual damping coefficient according to the power increasing working condition, the power decreasing working condition, the stage that the virtual angular frequency change rate is greater than zero and the stage that the virtual angular frequency change rate is less than zero.
4. The method of claim 3, wherein the constructing the adaptive virtual damping coefficient according to the power-up condition and the power-down condition, the phase in which the virtual angular frequency rate of change is greater than zero, and the phase in which the virtual angular frequency rate of change is less than zero comprises:
Figure 284614DEST_PATH_IMAGE004
wherein,Drepresenting the adaptive virtual damping coefficient and,D 0 representing the nominal virtual damping coefficient, k D Representing the virtual damping adaptive coefficient, k Dmax The maximum adjustment multiple of the virtual damping is shown,
Figure 107077DEST_PATH_IMAGE005
represents a virtual angular frequency deviation, and M represents a virtual angular frequency deviation threshold.
5. A hybrid energy storage VSG frequency oscillation suppression device, comprising:
a first construction module to construct a first hybrid energy storage VSG rotor mechanical equation, wherein the first hybrid energy storage VSG rotor mechanical equation includes a virtual damping coefficient;
the second construction module is used for constructing the self-adaptive virtual damping coefficient based on the sudden load change condition;
the representing module is used for representing the virtual damping coefficient by the self-adaptive virtual damping coefficient to obtain a second hybrid energy storage VSG rotor mechanical equation;
and the application module is used for applying the second hybrid energy storage VSG rotor mechanical equation to a hybrid energy storage VSG control system and executing a VSG virtual angular frequency suppression function.
6. The apparatus of claim 5, wherein the first configuration module comprises:
Figure 967585DEST_PATH_IMAGE006
wherein,Hrepresenting virtual moment of inertia, ω representing virtual angular frequency, ω 0 Indicating nominal angular frequency, T m Representing VSG mechanical torque, T e Representing electromagnetic torque, P ref Representing the active power reference value, P e Representing virtual electromagnetic power, T m Is approximately equal to
Figure 166485DEST_PATH_IMAGE007
，T e Is approximately equal to
Figure 835364DEST_PATH_IMAGE008
，DRepresenting the adaptive virtual damping coefficient and,P m to be virtual mechanical power, δ represents a virtual power angle, and t represents time.
7. The apparatus of claim 5, wherein the second configuration module comprises:
the first dividing unit is used for dividing the hybrid energy storage output power into a power increasing working condition and a power decreasing working condition according to the load sudden change condition;
the second dividing unit is used for dividing a stage in which the change rate of the virtual angular frequency is greater than zero and a stage in which the change rate of the virtual angular frequency is less than zero according to the change rate of the virtual angular frequency;
and the construction unit is used for constructing the self-adaptive virtual damping coefficient according to the power increasing working condition and the power decreasing working condition, the stage that the virtual angular frequency change rate is greater than zero and the stage that the virtual angular frequency change rate is less than zero.
8. The apparatus of claim 7, wherein the construction unit comprises:
Figure 828728DEST_PATH_IMAGE009
wherein,Drepresenting the adaptive virtual damping coefficient and,D 0 representing the nominal virtual damping coefficient, k D Representing the virtual damping adaptation coefficient, k Dmax The maximum adjustment multiple of the virtual damping is shown,
Figure 583057DEST_PATH_IMAGE010
represents a virtual angular frequency deviation, and M represents a virtual angular frequency deviation threshold.
9. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the hybrid energy storage VSG frequency oscillation suppression method of any of claims 1 to 4.
10. A computer readable storage medium whose instructions, when executed by a processor of an electronic device, enable the electronic device to perform the hybrid energy storage VSG frequency oscillation suppression method of any of claims 1-4.
CN202210957935.3A 2022-08-10 2022-08-10 Hybrid energy storage VSG frequency oscillation suppression method and device Pending CN115036942A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106130424A (en) * 2016-06-24 2016-11-16 西安交通大学 Virtual synchronous Generator Damping coefficient self-adaptation control method based on unified damping ratio
CN109861246A (en) * 2018-12-24 2019-06-07 燕山大学 A kind of photovoltaic microgrid dynamic frequency stable control method based on VSG
CN112398166A (en) * 2020-11-09 2021-02-23 西安热工研究院有限公司 Parameter analysis method for energy storage primary frequency modulation virtual synchronous machine
CN112467790A (en) * 2020-11-18 2021-03-09 西安热工研究院有限公司 Method for inhibiting power oscillation of virtual synchronizer of MMC interconnection converter
CN112491070A (en) * 2020-11-20 2021-03-12 西安热工研究院有限公司 Energy storage adaptive damping VSG control method
CN113890059A (en) * 2021-10-09 2022-01-04 华能洋浦热电有限公司 Stability analysis method and system for hybrid energy storage VSG control system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106130424A (en) * 2016-06-24 2016-11-16 西安交通大学 Virtual synchronous Generator Damping coefficient self-adaptation control method based on unified damping ratio
CN109861246A (en) * 2018-12-24 2019-06-07 燕山大学 A kind of photovoltaic microgrid dynamic frequency stable control method based on VSG
CN112398166A (en) * 2020-11-09 2021-02-23 西安热工研究院有限公司 Parameter analysis method for energy storage primary frequency modulation virtual synchronous machine
CN112467790A (en) * 2020-11-18 2021-03-09 西安热工研究院有限公司 Method for inhibiting power oscillation of virtual synchronizer of MMC interconnection converter
CN112491070A (en) * 2020-11-20 2021-03-12 西安热工研究院有限公司 Energy storage adaptive damping VSG control method
CN113890059A (en) * 2021-10-09 2022-01-04 华能洋浦热电有限公司 Stability analysis method and system for hybrid energy storage VSG control system

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