CN113517708A - Method and device for controlling flywheel energy storage array system, storage medium and controller - Google Patents

Method and device for controlling flywheel energy storage array system, storage medium and controller Download PDF

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Publication number
CN113517708A
CN113517708A CN202110758815.6A CN202110758815A CN113517708A CN 113517708 A CN113517708 A CN 113517708A CN 202110758815 A CN202110758815 A CN 202110758815A CN 113517708 A CN113517708 A CN 113517708A
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energy storage
real
voltage
storage array
array system
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孟克其劳
周云飞
张占强
海日罕
王藤
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Inner Mongolia University of Technology
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Inner Mongolia University of Technology
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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
    • H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

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Abstract

The present disclosure relates to a method, an apparatus, a storage medium, and a controller for controlling a flywheel energy storage array system, the method comprising: collecting real-time voltage and real-time current of a grid-connected point of a flywheel energy storage array system; determining whether a symmetrical fault exists in the flywheel energy storage array system according to the real-time voltage; under the condition that the flywheel energy storage array system is determined to have a symmetrical fault, determining a reference voltage according to the real-time voltage and the real-time current; and adjusting the output voltage of an inverter at the network side of the flywheel energy storage array system according to the reference voltage. That is to say, when the flywheel energy storage array system has a symmetric fault, the reference voltage can be determined through the real-time voltage and the real-time current of the grid-connected point, and the output voltage of the inverter on the network side of the flywheel energy storage array system is adjusted through the reference voltage, so that the flywheel energy storage array system can operate without being disconnected from the network when the flywheel energy storage array system has the symmetric fault, and the stability of the power grid is improved.

Description

Method and device for controlling flywheel energy storage array system, storage medium and controller
Technical Field
The present disclosure relates to the field of flywheel energy storage technologies, and in particular, to a method and an apparatus for controlling a flywheel energy storage array system, a storage medium, and a controller.
Background
With the development of new energy and grid-connected technology, the ratio of the new energy in a power grid is higher and higher, the new energy, especially wind power generation, is greatly influenced by natural environment, and the stability, the power quality and the like of the power grid system can be influenced by large-scale grid connection of wind power.
In the related art, in order to improve the stability and the electric energy quality of a power grid, electric energy is converted into mechanical energy through a flywheel energy storage array system and stored in a flywheel rotating at a high speed, when electricity is needed, a generator is driven by the flywheel to generate electricity, and energy storage and release are realized through the speed increase and the speed decrease of the flywheel. However, both the flywheel energy storage unit and the grid side in the flywheel energy storage array system are connected to the power grid through the inverter, and the damping characteristic and the inertia characteristic of the traditional synchronous machine are lacked, so that the stability of the power grid system is low.
Disclosure of Invention
In order to solve the above problems, the present disclosure provides a method, an apparatus, a storage medium, and a controller for controlling a flywheel energy storage array system.
In a first aspect, the present disclosure provides a method of controlling a flywheel energy storage array system, the method comprising:
collecting real-time voltage and real-time current of a grid-connected point of a flywheel energy storage array system;
determining whether a symmetrical fault exists in the flywheel energy storage array system according to the real-time voltage;
under the condition that the flywheel energy storage array system is determined to have a symmetrical fault, determining a reference voltage according to the real-time voltage and the real-time current;
and adjusting the output voltage of an inverter at the network side of the flywheel energy storage array system according to the reference voltage.
Optionally, the determining whether there is a symmetric fault in the flywheel energy storage array system according to the real-time voltage includes:
acquiring a preset reference voltage;
and determining whether the flywheel energy storage array system has a symmetrical fault or not according to the real-time voltage and the preset reference voltage.
Optionally, the determining whether a symmetrical fault exists in the flywheel energy storage array system according to the real-time voltage and the preset reference voltage includes:
determining the ratio of the real-time voltage to the preset reference voltage;
determining whether the three-phase voltage corresponding to the real-time voltage drops simultaneously or not under the condition that the ratio is smaller than or equal to a preset ratio threshold;
and determining that the flywheel energy storage array system has a symmetrical fault under the condition that the three-phase voltage corresponding to the real-time voltage falls simultaneously.
Optionally, the determining a reference voltage according to the real-time voltage and the real-time current comprises:
determining actual active power and actual reactive power corresponding to the flywheel energy storage array system according to the real-time voltage and the real-time current;
determining a target voltage phase angle according to the actual active power;
determining a target voltage amplitude according to the actual reactive power;
and determining the reference voltage according to the target voltage phase angle and the target voltage amplitude.
Optionally, the method further comprises:
acquiring a preset network side maximum current corresponding to the network side of the flywheel energy storage array system;
determining a network side reference current corresponding to the network side according to the preset network side maximum current;
and controlling the output current of the network side according to the network side reference current.
Optionally, the method further comprises:
acquiring a preset flywheel maximum current corresponding to a flywheel unit side of the flywheel energy storage array system;
determining a flywheel reference current corresponding to the flywheel unit side according to the preset flywheel maximum current;
and controlling the output current of the flywheel unit side according to the flywheel reference current.
In a second aspect, the present disclosure provides an apparatus for controlling a flywheel energy storage array system, the apparatus comprising:
the acquisition module is used for acquiring real-time voltage and real-time current of a grid-connected point of the flywheel energy storage array system;
the fault determining module is used for determining whether the flywheel energy storage array system has a symmetrical fault according to the real-time voltage;
the voltage determining module is used for determining a reference voltage according to the real-time voltage and the real-time current under the condition that the flywheel energy storage array system is determined to have a symmetrical fault;
and the adjusting module is used for adjusting the output voltage of the inverter on the network side of the flywheel energy storage array system according to the reference voltage.
Optionally, the fault determination module is further configured to:
acquiring a preset reference voltage;
and determining whether the flywheel energy storage array system has a symmetrical fault or not according to the real-time voltage and the preset reference voltage.
Optionally, the fault determination module is further configured to:
determining the ratio of the real-time voltage to the preset reference voltage;
determining whether the three-phase voltage corresponding to the real-time voltage drops simultaneously or not under the condition that the ratio is smaller than or equal to a preset ratio threshold;
and determining that the flywheel energy storage array system has a symmetrical fault under the condition that the three-phase voltage corresponding to the real-time voltage falls simultaneously.
Optionally, the voltage determining module is further configured to:
determining actual active power and actual reactive power corresponding to the flywheel energy storage array system according to the real-time voltage and the real-time current;
determining a target voltage phase angle according to the actual active power;
determining a target voltage amplitude according to the actual reactive power;
and determining the reference voltage according to the target voltage phase angle and the target voltage amplitude.
Optionally, the apparatus further comprises:
the first current acquisition module is used for acquiring a preset network side maximum current corresponding to the network side of the flywheel energy storage array system;
the first current determining module is used for determining a network side reference current corresponding to the network side according to the preset network side maximum current;
and the first control module is used for controlling the output current of the network side according to the network side reference current.
Optionally, the apparatus further comprises:
the second current acquisition module is used for acquiring the preset maximum current of the flywheel corresponding to the flywheel unit side of the flywheel energy storage array system;
the second current determining module is used for determining flywheel reference current corresponding to the flywheel unit side according to the preset maximum flywheel current;
and the second control module is used for controlling the output current of the flywheel unit side according to the flywheel reference current.
In a third aspect, the present disclosure provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of the first aspect of the present disclosure.
In a fourth aspect, the present disclosure provides a controller comprising: a memory having a computer program stored thereon; a processor for executing the computer program in the memory to implement the steps of the method of the first aspect of the disclosure.
By the technical scheme, the real-time voltage and the real-time current of the grid-connected point of the flywheel energy storage array system are periodically collected; determining whether a symmetrical fault exists in the flywheel energy storage array system according to the real-time voltage; under the condition that the flywheel energy storage array system is determined to have a symmetrical fault, determining a reference voltage according to the real-time voltage and the real-time current; and adjusting the output voltage of an inverter at the network side of the flywheel energy storage array system according to the reference voltage. That is to say, when the flywheel energy storage array system has a symmetric fault, the reference voltage can be determined through the real-time voltage and the real-time current of the grid-connected point, and the output voltage of the inverter on the network side of the flywheel energy storage array system is adjusted through the reference voltage, so that the flywheel energy storage array system can operate without being disconnected from the network when the flywheel energy storage array system has the symmetric fault, and the stability of the power grid is improved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a method of controlling a flywheel energy storage array system in accordance with an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a flywheel energy storage array system according to an exemplary embodiment of the present disclosure;
FIG. 3 is a flow chart illustrating another method of controlling a flywheel energy storage array system in accordance with an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a voltage control circuit shown in an exemplary embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a current control circuit shown in an exemplary embodiment of the present disclosure;
FIG. 6 is a block diagram illustrating an apparatus for controlling a flywheel energy storage array system in accordance with an exemplary embodiment of the present disclosure;
FIG. 7 is a block diagram illustrating a second apparatus for controlling a flywheel energy storage array system in accordance with an exemplary embodiment of the present disclosure;
FIG. 8 is a block diagram illustrating a third apparatus for controlling a flywheel energy storage array system in accordance with an exemplary embodiment of the present disclosure;
FIG. 9 is a block diagram illustrating a controller according to an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the description that follows, the terms "first," "second," and the like are used for descriptive purposes only and are not intended to indicate or imply relative importance nor order to be construed.
The present disclosure is illustrated below with reference to specific examples.
Fig. 1 is a flowchart illustrating a method for controlling a flywheel energy storage array system according to an exemplary embodiment of the present disclosure, where the method may include:
s101, collecting real-time voltage and real-time current of a grid-connected point of a flywheel energy storage array system.
Fig. 2 is a schematic structural diagram of a flywheel energy storage array system according to an exemplary embodiment of the present disclosure, and as shown in fig. 2, the flywheel energy storage array system includes a flywheel unit side and a grid side, the flywheel unit side and the grid side are connected through an inverter, M/G is a motor, and the flywheel unit side includes a plurality of flywheel units connected in parallel.
In this step, after the array controller of the flywheel energy storage array system is started, the real-time voltage and the real-time current of the grid-connected point can be collected.
And S102, determining whether the flywheel energy storage array system has a symmetrical fault according to the real-time voltage.
In this step, after the real-time voltage and the real-time current of the grid-connected point are collected, a preset reference voltage can be obtained, and whether a symmetrical fault exists in the flywheel energy storage array system is determined according to the real-time voltage and the preset reference voltage. The ratio of the real-time voltage to the preset reference voltage can be determined, whether the three-phase voltage corresponding to the real-time voltage falls simultaneously or not is determined under the condition that the ratio is smaller than or equal to a preset ratio threshold, and the flywheel energy storage array system is determined to have a symmetrical fault under the condition that the three-phase voltage corresponding to the real-time voltage falls simultaneously. For example, the preset reference voltage may be 220V, and the preset ratio threshold may be 1 pu.
And S103, determining a reference voltage according to the real-time voltage and the real-time current under the condition that the flywheel energy storage array system has a symmetrical fault.
In this step, when it is determined that the flywheel energy storage array system has a symmetric fault, the actual active power and the actual reactive power corresponding to the flywheel energy storage array system may be determined according to the real-time voltage and the real-time current, a target voltage phase angle and a target voltage amplitude value may be determined according to the actual active power and the actual reactive power, and the reference voltage may be determined according to the target voltage phase angle and the target voltage amplitude value.
And S104, adjusting the output voltage of the inverter on the network side of the flywheel energy storage array system according to the reference voltage.
In this step, after the reference voltage is determined, Pulse signals g1 to g6 may be generated by PWM (Pulse Width Modulation), and the Pulse signals g1 to g6 are input to g terminals of 6 IGBTs (Insulated Gate Bipolar transistors) of the inverter on the net side of the flywheel energy storage array system, respectively, to adjust the output voltage of the inverter.
By adopting the method, when the flywheel energy storage array system has a symmetrical fault, the reference voltage can be determined through the real-time voltage and the real-time current of the grid-connected point, and the output voltage of the inverter on the network side of the flywheel energy storage array system is adjusted through the reference voltage, so that the flywheel energy storage array system can operate without being disconnected from the network when the flywheel energy storage array system has the symmetrical fault, and the stability of the power grid is improved.
Fig. 3 is a flowchart illustrating another method for controlling a flywheel energy storage array system according to an exemplary embodiment of the disclosure, where the method may include:
s301, collecting real-time voltage and real-time current of a grid-connected point of the flywheel energy storage array system.
And S302, determining whether the flywheel energy storage array system has a symmetrical fault according to the real-time voltage.
And S303, under the condition that the flywheel energy storage array system is determined to have a symmetrical fault, determining the actual active power and the actual reactive power corresponding to the flywheel energy storage array system according to the real-time voltage and the real-time current.
The real-time voltage comprises real-time d-axis voltage and real-time q-axis voltage, the real-time d-axis voltage and the real-time q-axis voltage are components of grid-connected point voltage of the grid-connected side inverter under a dq coordinate system, the real-time current comprises real-time d-axis current and real-time q-axis current, and the real-time d-axis current and the real-time q-axis current are components of grid-connected point current of the grid-connected side inverter under the dq coordinate system.
In this step, under the condition that it is determined that the flywheel energy storage array system has a symmetric fault, the actual active power corresponding to the flywheel energy storage array system can be calculated according to the real-time voltage and the real-time current by the following formula:
Figure BDA0003148846470000081
wherein, PeFor the actual active power, edFor the real-time d-axis voltage, eqFor the real-time q-axis voltage, idFor the real-time d-axis current, iqIs the real time q-axis current.
The actual reactive power corresponding to the flywheel energy storage array system is calculated through the following formula:
Figure BDA0003148846470000082
wherein Q iseIs the actual reactive power.
And S304, determining a target voltage phase angle according to the actual active power.
In this step, after the actual active power is determined, a preset active power, a preset virtual moment of inertia, a preset rated angular frequency, and a preset virtual damping coefficient may be obtained, and the target voltage phase angle is calculated according to the actual active power, the preset virtual moment of inertia, the preset rated angular frequency, and the preset virtual damping coefficient by the following formula:
Figure BDA0003148846470000083
wherein, JsFor the preset virtual moment of inertia, wnFor the predetermined nominal angular frequency,. DELTA.w is the deviation of the angular frequency of the virtual synchronous generator from the predetermined nominal angular frequency, PrefFor the preset active power, DpFor the preset virtual damping coefficient, θ is the target voltage phase angle.
And S305, determining a target voltage amplitude according to the actual reactive power.
In this step, after the actual reactive power is determined, a preset reactive power, a preset no-load potential and a preset proportionality coefficient may be obtained, and the target voltage amplitude is calculated according to the actual reactive power, the preset no-load potential and the preset proportionality coefficient by the following formula:
E＝E0+m(Qref-Qe) (4)
wherein E is the target voltage amplitude, E0For the predetermined no-load potential, m is the predetermined proportionality coefficient, QrefIs the preset reactive power.
S306, determining the reference voltage according to the target voltage phase angle and the target voltage amplitude.
In this step, after determining the target voltage phase angle and the target voltage magnitude, the reference voltage may be generated by a pulse generator according to the target voltage phase angle and the target voltage magnitude. For example, the reference voltage may be calculated by the following formula:
Figure BDA0003148846470000091
wherein U is the maximum amplitude of the reference voltage,
Figure BDA0003148846470000092
is the reference voltage ua、ub、ucThe three-phase voltage corresponding to the reference voltage.
Fig. 4 is a schematic diagram of a voltage control circuit according to an exemplary embodiment of the disclosure, and as shown in fig. 4, after the actual active power and the actual reactive power are obtained, the actual active power and the actual reactive power may be used as inputs of the circuit, and the pulse signals g1 to g6 are finally obtained. The Pulse Generator is the Pulse Generator.
And S307, adjusting the output voltage of the inverter on the network side of the flywheel energy storage array system according to the reference voltage.
And S308, acquiring the preset maximum current of the network side corresponding to the network side of the flywheel energy storage array system.
The preset grid-side maximum current may be a maximum current allowed to pass through a grid-side inverter of the flywheel energy storage array system.
And S309, determining a network side reference current corresponding to the network side according to the preset network side maximum current.
The grid-side reference current may include a d-axis grid-side reference current and a q-axis grid-side reference current.
In this step, after the preset maximum network-side current is obtained, the network-side inverter of the flywheel energy storage array system may be reset to output the active power command P0refAnd (generally set to 0), the reactive power is maximally sent to the power grid on the premise that the inverter is not damaged by overcurrent so as to support the recovery of the power grid. For example, the d-axis grid-side reference current and the q-axis grid-side reference current may be calculated by the following equations:
Figure BDA0003148846470000101
wherein idref1For the d-axis grid side reference current, iqref1For the q-axis network side reference current, P0refFor a predetermined active power, i, output by the network-side invertermax1The preset net side maximum current is adopted.
And S310, controlling the output current of the network side according to the network side reference current.
In this step, after determining the grid-side reference current of the flywheel energy storage array system, the output current of the grid side may be controlled by a current inner loop control strategy of the prior art to track the grid-side reference current without dead-error, fig. 5 is a schematic diagram of a current control circuit shown in an exemplary embodiment of the present disclosure, as shown in fig. 5, the preset active power output by the grid-side inverter, the preset grid-side maximum current, the d-axis grid-side reference current, the real-time d-axis current, and the real-time q-axis current may be used as inputs of the circuit, and finally, the output current of the grid side may be controlled by the current inner loop control strategy.
And S311, acquiring a preset flywheel maximum current corresponding to the flywheel unit side of the flywheel energy storage array system.
Wherein the preset flywheel maximum current may be a maximum current allowed to pass through an inverter on a flywheel unit side of the flywheel energy storage array system.
And S312, determining the flywheel reference current corresponding to the flywheel unit side according to the preset flywheel maximum current.
The flywheel reference current may include a d-axis flywheel reference current and a q-axis flywheel reference current, among others.
In this step, after the preset maximum current of the flywheel is obtained, the reference current of the d-axis flywheel and the reference current of the q-axis flywheel can be calculated by the following formula:
Figure BDA0003148846470000111
wherein imIs the flywheel sheetPreset current amplitude i after element side amplitude limitingmax2For the preset flywheel maximum current, idref2For the d-axis flywheel reference current, iqref2The q-axis flywheel is referenced to a current.
And S313, controlling the output current of the flywheel unit side according to the flywheel reference current.
In this step, after obtaining the flywheel reference current, the output current of the flywheel unit side can be controlled by an ADRC (Active Disturbance Rejection Control) closed-loop controller to track the flywheel reference current without dead-lag.
By adopting the method, when the flywheel energy storage array system has a symmetrical fault, the reference voltage can be determined through the real-time voltage and the real-time current of the grid-connected point, and the output voltage of the inverter on the network side of the flywheel energy storage array system is adjusted through the reference voltage, so that the flywheel energy storage array system can operate without being disconnected from the network when the flywheel energy storage array system has the symmetrical fault, and the stability of the power grid is improved. Further, a flywheel reference current corresponding to a flywheel unit side of the flywheel energy storage array system and a network side reference current corresponding to a network side can be obtained, and output currents of the flywheel unit side and the network side are controlled through the ADRC closed-loop controller, so that output current amplitude limiting and stability of direct-current bus voltage are higher.
Fig. 6 is a block diagram illustrating an apparatus for controlling a flywheel energy storage array system according to an exemplary embodiment of the disclosure, and as shown in fig. 6, the apparatus may include:
the acquisition module 601 is used for acquiring real-time voltage and real-time current of a grid-connected point of the flywheel energy storage array system;
a fault determining module 602, configured to determine whether a symmetric fault exists in the flywheel energy storage array system according to the real-time voltage;
a voltage determining module 603, configured to determine a reference voltage according to the real-time voltage and the real-time current when it is determined that the flywheel energy storage array system has a symmetric fault;
and an adjusting module 604, configured to adjust an output voltage of the inverter on the network side of the flywheel energy storage array system according to the reference voltage.
Optionally, the fault determining module 602 is further configured to:
acquiring a preset reference voltage;
and determining whether the flywheel energy storage array system has a symmetrical fault or not according to the real-time voltage and the preset reference voltage.
Optionally, the fault determining module 602 is further configured to:
determining the ratio of the real-time voltage to the preset reference voltage;
determining whether the three-phase voltage corresponding to the real-time voltage drops simultaneously or not under the condition that the ratio is smaller than or equal to a preset ratio threshold;
and determining that the flywheel energy storage array system has a symmetrical fault under the condition that the three-phase voltage corresponding to the real-time voltage falls simultaneously.
Optionally, the voltage determining module 603 is further configured to:
determining actual active power and actual reactive power corresponding to the flywheel energy storage array system according to the real-time voltage and the real-time current;
determining a target voltage phase angle according to the actual active power;
determining a target voltage amplitude according to the actual reactive power;
and determining the reference voltage according to the target voltage phase angle and the target voltage amplitude.
Optionally, fig. 7 is a block diagram of a second apparatus for controlling a flywheel energy storage array system according to an exemplary embodiment of the disclosure, and as shown in fig. 7, the apparatus further includes:
a first current obtaining module 605, configured to obtain a preset maximum current of a network side corresponding to the network side of the flywheel energy storage array system;
a first current determining module 606, configured to determine, according to the preset maximum network-side current, a network-side reference current corresponding to the network side;
the first control module 607 is configured to control the output current of the network side according to the network side reference current.
Optionally, fig. 8 is a block diagram of a third apparatus for controlling a flywheel energy storage array system according to an exemplary embodiment of the disclosure, and as shown in fig. 8, the apparatus further includes:
a second current obtaining module 608, configured to obtain a preset maximum current of the flywheel corresponding to a flywheel unit side of the flywheel energy storage array system;
a second current determining module 609, configured to determine a flywheel reference current corresponding to the flywheel unit side according to the preset flywheel maximum current;
a second control module 610 for controlling the output current of the flywheel unit side according to the flywheel reference current.
Through the device, when the flywheel energy storage array system has a symmetrical fault, the reference voltage can be determined through the real-time voltage and the real-time current of the grid-connected point, and the output voltage of the inverter on the network side of the flywheel energy storage array system is adjusted through the reference voltage, so that the flywheel energy storage array system can operate without being disconnected from the network when the flywheel energy storage array system has the symmetrical fault, and the stability of the power grid is improved.
Fig. 9 is a block diagram illustrating a controller 900 according to an example embodiment. Referring to fig. 9, the controller 900 includes a processor 922, which may be one or more in number, and a memory 932 for storing computer programs executable by the processor 922. The computer programs stored in memory 932 may include one or more modules that each correspond to a set of instructions. Further, the processor 922 may be configured to execute the computer program to perform the above-described method of controlling the flywheel energy storage array system.
In addition, the controller 900 may also include a power component 926 and a communication component 950, the power component 926 may be configured to perform power management of the controller 900, and the communication component 950 may be configured to enable communication, e.g., wired or wireless communication, of the controller 900. The controller 900 may also include an input/output (I/O) interface 958. The controller 900 may operate based on an operating system stored in the memory 932, such as Windows ServerTM，Mac OS XTM，UnixTM，LinuxTMAnd so on.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the above-described method of controlling a flywheel energy storage array system is also provided. For example, the computer readable storage medium may be the memory 932 described above including program instructions that are executable by the processor 922 of the controller 900 to perform the method described above for controlling a flywheel energy storage array system.
In another exemplary embodiment, a computer program product is also provided, which comprises a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-mentioned method of controlling a flywheel energy storage array system when executed by the programmable apparatus.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A method of controlling a flywheel energy storage array system, the method comprising:
collecting real-time voltage and real-time current of a grid-connected point of a flywheel energy storage array system;
determining whether a symmetrical fault exists in the flywheel energy storage array system according to the real-time voltage;
under the condition that the flywheel energy storage array system is determined to have a symmetrical fault, determining a reference voltage according to the real-time voltage and the real-time current;
and adjusting the output voltage of an inverter at the network side of the flywheel energy storage array system according to the reference voltage.
2. The method of claim 1, wherein the determining whether a symmetrical fault exists in the flywheel energy storage array system according to the real-time voltage comprises:
acquiring a preset reference voltage;
and determining whether the flywheel energy storage array system has a symmetrical fault or not according to the real-time voltage and the preset reference voltage.
3. The method of claim 2, wherein the determining whether the flywheel energy storage array system has a symmetrical fault according to the real-time voltage and the preset reference voltage comprises:
determining the ratio of the real-time voltage to the preset reference voltage;
determining whether the three-phase voltage corresponding to the real-time voltage drops simultaneously or not under the condition that the ratio is smaller than or equal to a preset ratio threshold;
and determining that the flywheel energy storage array system has a symmetrical fault under the condition that the three-phase voltage corresponding to the real-time voltage falls simultaneously.
4. The method of claim 1, wherein determining a reference voltage from the real-time voltage and the real-time current comprises:
determining actual active power and actual reactive power corresponding to the flywheel energy storage array system according to the real-time voltage and the real-time current;
determining a target voltage phase angle according to the actual active power;
determining a target voltage amplitude according to the actual reactive power;
and determining the reference voltage according to the target voltage phase angle and the target voltage amplitude.
5. The method of claim 1, further comprising:
acquiring a preset network side maximum current corresponding to the network side of the flywheel energy storage array system;
determining a network side reference current corresponding to the network side according to the preset network side maximum current;
and controlling the output current of the network side according to the network side reference current.
6. The method according to any one of claims 1-5, further comprising:
acquiring a preset flywheel maximum current corresponding to a flywheel unit side of the flywheel energy storage array system;
determining a flywheel reference current corresponding to the flywheel unit side according to the preset flywheel maximum current;
and controlling the output current of the flywheel unit side according to the flywheel reference current.
7. An apparatus for controlling a flywheel energy storage array system, the apparatus comprising:
the acquisition module is used for acquiring real-time voltage and real-time current of a grid-connected point of the flywheel energy storage array system;
the fault determining module is used for determining whether the flywheel energy storage array system has a symmetrical fault according to the real-time voltage;
the voltage determining module is used for determining a reference voltage according to the real-time voltage and the real-time current under the condition that the flywheel energy storage array system is determined to have a symmetrical fault;
and the adjusting module is used for adjusting the output voltage of the inverter on the network side of the flywheel energy storage array system according to the reference voltage.
8. The apparatus of claim 7, wherein the fault determination module is further configured to:
acquiring a preset reference voltage;
and determining whether the flywheel energy storage array system has a symmetrical fault or not according to the real-time voltage and the preset reference voltage.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
10. A controller, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 6.
CN202110758815.6A 2021-07-05 2021-07-05 Method and device for controlling flywheel energy storage array system, storage medium and controller Pending CN113517708A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114825396A (en) * 2022-06-20 2022-07-29 南京工程学院 Method for improving DC bus voltage robustness of high-speed flywheel energy storage array

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437811A (en) * 2011-09-26 2012-05-02 重庆大学 Low voltage ride through control method of permanent magnet direct drive wind power generation system with flywheel energy storage unit during power grid symmetrical short circuit default
CN110198040A (en) * 2019-05-20 2019-09-03 清华大学 Flywheel energy storage system low voltage traversing control method and device based on VSG
CN111342491A (en) * 2020-03-20 2020-06-26 华中科技大学 Grid-connected control method and system suitable for flywheel energy storage device
CN112510733A (en) * 2021-02-04 2021-03-16 沈阳微控新能源技术有限公司 Flywheel energy storage system, control method thereof and computer readable storage medium
CN112636374A (en) * 2021-03-09 2021-04-09 沈阳微控新能源技术有限公司 Primary frequency modulation and virtual inertia response control method and device for wind power station

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437811A (en) * 2011-09-26 2012-05-02 重庆大学 Low voltage ride through control method of permanent magnet direct drive wind power generation system with flywheel energy storage unit during power grid symmetrical short circuit default
CN110198040A (en) * 2019-05-20 2019-09-03 清华大学 Flywheel energy storage system low voltage traversing control method and device based on VSG
CN111342491A (en) * 2020-03-20 2020-06-26 华中科技大学 Grid-connected control method and system suitable for flywheel energy storage device
CN112510733A (en) * 2021-02-04 2021-03-16 沈阳微控新能源技术有限公司 Flywheel energy storage system, control method thereof and computer readable storage medium
CN112636374A (en) * 2021-03-09 2021-04-09 沈阳微控新能源技术有限公司 Primary frequency modulation and virtual inertia response control method and device for wind power station

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李汶灿等: "基于多模式协调的飞轮储能系统故障穿越控制方法", 《储能科学与技术》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114825396A (en) * 2022-06-20 2022-07-29 南京工程学院 Method for improving DC bus voltage robustness of high-speed flywheel energy storage array

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