CN113162206A - Super capacitor energy storage device based on cascaded half-bridge, control method thereof and storage medium - Google Patents

Super capacitor energy storage device based on cascaded half-bridge, control method thereof and storage medium Download PDF

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Publication number
CN113162206A
CN113162206A CN202110452975.8A CN202110452975A CN113162206A CN 113162206 A CN113162206 A CN 113162206A CN 202110452975 A CN202110452975 A CN 202110452975A CN 113162206 A CN113162206 A CN 113162206A
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China
Prior art keywords
bridge
energy storage
bridge module
thyristors
storage device
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CN202110452975.8A
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Inventor
史明明
葛雪峰
袁宇波
刘瑞煌
姜云龙
司鑫尧
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State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power 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
    • 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
    • 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
    • H02J15/00—Systems for storing electric energy
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost converters
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Abstract

The invention discloses a super-capacitor energy storage device based on a cascaded half bridge, a control method thereof and a storage medium, wherein the super-capacitor energy storage device comprises a plurality of single-phase branches which are arranged in parallel, each single-phase branch comprises a plurality of energy storage units, a plurality of buck/boost converters, a cascaded branch based on a half bridge module, a full bridge module based on a bidirectional thyristor, an outlet filter inductor and a power grid, the energy storage units are connected with the buck/boost converters, the cascaded branch based on the half bridge module comprises a plurality of sub-modules, the buck/boost converters are connected with the sub-modules of the cascaded branch, the cascaded branch based on the half bridge module is connected with the full bridge module based on the bidirectional thyristor, and the module based on the bidirectional thyristor is sequentially connected with the outlet filter inductor and the power grid in series. According to the invention, through carrying out optimization design on the chain type converter applied to the field of energy storage, the required number of energy storage units and switching tubes is reduced, the voltage-resistant grade of the device is improved, the modulation and voltage-sharing processes are simplified, the cost of the energy storage device is reduced, and the transformer-free high-voltage direct hanging of the energy storage device is realized.

Description

Super capacitor energy storage device based on cascaded half-bridge, control method thereof and storage medium
Technical Field
The invention belongs to the field of energy storage converter design, relates to an energy storage converter optimization design scheme for high-voltage direct hanging based on a super capacitor, and particularly relates to a super capacitor energy storage device based on a cascade half bridge and a control method thereof.
Background
The super capacitor is widely applied to energy storage application occasions with short time, high efficiency, high power density, long cycle life and safety, but the voltage of a single energy storage module is very low, the capacity is very small, a large number of energy storage modules are often required to be used in a series-parallel combination mode, the voltage and current sharing among the energy storage modules are difficult, and the device efficiency is low.
The chain-type converter can realize the collection of a large number of energy storage units, can realize the independent control of the sub-modules, and can promote the voltage and current sharing among the energy storage modules in the energy storage application occasion. And the modular structure can customize the output voltage of the converter, realize that the converter has no high voltage of the transformer and hangs directly, raise the efficiency of the energy storage device. However, the amplitude of the grid voltage is very high, and the number of series-connected energy storage devices required for meeting the voltage constraint of the converter is too large, so that energy storage capacity is wasted. The traditional chain-type converter needs more switching tubes, the output of the energy storage module and the output of the converter submodule are more, the modulation and voltage-sharing processes of the submodules are too complex, and a new technical scheme is needed to solve the problems.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the cascade half-bridge-based super-capacitor energy storage device and the control method thereof are provided, and the chain converter applied to the field of energy storage is optimally designed so as to reduce the required number of energy storage units and switch tubes, improve the voltage-resistant grade of the device, simplify the modulation and voltage-sharing processes, reduce the cost of the energy storage device, and realize the transformer-free high-voltage direct hanging of the energy storage device.
The technical scheme is as follows: in order to achieve the purpose, the invention provides a super-capacitor energy storage device based on a cascaded half-bridge, which comprises a plurality of single-phase branches arranged in parallel, wherein each single-phase branch comprises a plurality of energy storage units, a plurality of buck/boost converters, a cascaded branch based on a half-bridge module, a full-bridge module based on a bidirectional thyristor, an outlet filter inductor and a power grid, the energy storage units are connected with the buck/boost converters, the cascaded branch based on the half-bridge module comprises a plurality of sub-modules, the buck/boost converters are connected with the sub-modules of the cascaded branch, the cascaded branch based on the half-bridge module is connected with the full-bridge module based on the bidirectional thyristor, and the full-bridge module based on the bidirectional thyristor is sequentially connected with the outlet filter inductor and the power grid in series.
Furthermore, the buck/boost converter comprises a filter inductor, a first upper switch tube, a first lower switch tube and a filter capacitor, the sub-module of the cascade branch comprises a second upper switch tube and a second lower switch tube, the energy storage unit is connected with the filter inductor and an emitter of the first lower switch tube, and the filter capacitor is connected with a collector of the second upper switch tube and an emitter of the second lower switch tube.
Further, the emitter of the switching tube under the kth half-bridge circuit in the cascaded branch based on the half-bridge modules is connected with the emitter of the switching tube on the (k + 1) th half-bridge circuit.
Furthermore, the cascade branch circuit based on the half-bridge module is connected with the full-bridge module based on the bidirectional thyristor through the base electrode of the switching tube on the first half-bridge circuit and the emitter electrode of the switching tube under the last half-bridge circuit.
Furthermore, the full-bridge module based on the bidirectional thyristors is composed of a plurality of bridge arms, each bridge arm is a single-drive series bidirectional thyristor which is capacitively coupled, and all thyristors of the bridge arms can be triggered simultaneously.
Further, the number of the bridge arms in the full-bridge module based on the bidirectional thyristors is four, if the modulation wave of a certain phase is greater than or equal to 0, the four thyristors at the upper left corner and the four thyristors at the lower right corner in the full-bridge module based on the bidirectional thyristors of the phase are conducted at the same time, otherwise, the four thyristors at the upper right corner and the four thyristors at the lower left corner are conducted at the same time.
A control method of a super capacitor energy storage device based on a cascade half bridge comprises the following steps:
s1: acquiring an output signal by adopting a virtual synchronous machine algorithm;
s2: the output signal is transmitted to a classic power grid current loop to obtain a modulation wave um；
S3: the buck/boost converters all adopt a voltage loop to control the voltage of a filter capacitor of the buck/boost converters, a cascade branch circuit based on a half-bridge module adopts nearest level approximation modulation based on voltage sequencing, and a modulation wave umA cascade branch circuit based on a half-bridge module is driven through an absolute value link, nearest level approximation modulation and voltage sequencing; if the modulation wave of a certain phase is greater than or equal to 0, the four thyristors at the upper left corner and the four thyristors at the lower right corner in the full-bridge module based on the bidirectional thyristors of the phase are conducted at the same time, otherwise, the four thyristors at the upper right corner and the four thyristors at the lower left corner are conducted at the same time.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) raising the voltage of the sub-modules of the chain-link converter through the buck/boost converter, and reducing the number of super capacitors;
(2) the half-bridge modules form a cascade branch of the chain-type converter, so that the number of switching tubes is reduced;
(3) the full-bridge module based on the bidirectional thyristor is used for simplifying the modulation and voltage-sharing process and improving the voltage-withstanding grade of the device.
Drawings
FIG. 1 is a super capacitor energy storage topology based on cascaded half bridges;
FIG. 2 is a capacitively coupled single drive series triac;
FIG. 3 is an overall control block diagram of a super capacitor energy storage device based on a cascaded half bridge;
fig. 4 is a block diagram of drive signal generation for a cascaded half-bridge based super-capacitor energy storage device.
In fig. 1: the power supply comprises an energy storage unit 1, a buck/boost converter 2, a cascade branch circuit 3 based on a half-bridge module, a capacitor-coupled single-drive series bidirectional thyristor 4, a full-bridge module 5 based on the bidirectional thyristor, an outlet filter inductor 6, a power grid 7 and a single-phase branch circuit 8.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
As shown in fig. 1, the present invention provides a super capacitor energy storage device based on a cascaded half bridge, which includes three single phase branches 8 connected in parallel, where each single phase branch includes n energy storage units 1, n buck/boost converters 2, a cascaded branch 3 based on a half bridge module, a full bridge module 5 based on a bidirectional thyristor, an outlet filter inductor 6 and a power grid 7, the n energy storage units 1 are respectively connected to the n buck/boost converters 2, the cascaded branch 3 based on a half bridge module includes n submodules (half bridge circuits), the n buck/boost converters 2 are respectively connected to the n submodules of the cascaded branch 3 based on a half bridge module, the cascaded branch 3 based on a half bridge module is connected to the full bridge module 5 based on a bidirectional thyristor, and the full bridge module 5 based on a bidirectional thyristor is sequentially connected to the outlet filter inductor 6 and the power grid 7 in series.
In the embodiment, the buck/boost converter 2 comprises a filter inductor, a first upper switch tube, a first lower switch tube and a filter capacitor, the sub-module of the cascade branch 3 comprises a second upper switch tube and a second lower switch tube, the energy storage unit 1 is connected with the filter inductor and an emitter of the first lower switch tube, and the filter capacitor is connected with a collector of the second upper switch tube and an emitter of the second lower switch tube; an emitter of a switching tube under the kth half-bridge circuit in the cascade branch 3 based on the half-bridge module is connected with an emitter of a switching tube on the (k + 1) th half-bridge circuit; the cascade branch 3 based on the half-bridge module is connected with the full-bridge module 5 based on the bidirectional thyristor through the base electrode of the switching tube on the first half-bridge circuit and the emitting electrode of the switching tube under the last half-bridge circuit; the full-bridge module 5 based on the bidirectional thyristors is composed of four bridge arms, each bridge arm is a single-drive series bidirectional thyristor 4 which is capacitively coupled, so that simultaneous triggering of all thyristors of the bridge arms can be realized, if a phase modulation wave is more than or equal to 0, four thyristors at the upper left corner and four thyristors at the lower right corner in the full-bridge module based on the bidirectional thyristors of the phase are simultaneously conducted, otherwise, four thyristors at the upper right corner and four thyristors at the lower left corner are simultaneously conducted.
As shown in fig. 2, the capacitor-coupled single-drive series bidirectional thyristor 4 is composed of a voltage-sharing resistor, a voltage-stabilizing tube and a capacitor. When a trigger signal is input, the upper left thyristor and the lower right thyristor are conducted, the voltage stabilizing tube is biased in the forward direction, the voltage stabilizing tube is conducted, and the lower left thyristor and the upper right thyristor are conducted. Thus, the capacitively coupled single drive series triac shown in fig. 2 can trigger four thyristors simultaneously.
Based on the super capacitor energy storage device, the embodiment provides a control method of a super capacitor energy storage device based on a cascaded half bridge, including the following steps:
s1: acquiring an output signal by adopting a virtual synchronous machine algorithm;
as shown in fig. 3, 1 is a Virtual Synchronous machine algorithm (VSG), and 2 is a grid current loop. The virtual synchronous machine algorithm specifically comprises the following steps:
Figure BDA0003039506170000031
wherein v isabcAnd iabcIs the inverter AC bus voltage and current, P, Q is the fundamental active and reactive power of the AC bus, P*、Q*Is active and reactive given, V*V is the rated voltage amplitude and the AC bus voltage amplitude, omega*、ωmRated and VSG electrical angular velocities, Dp、DqActive-frequency (P-f) and reactive-voltage (Q-V) droop coefficients, J, K inertia coefficients for active and reactive loops, EmIs the VSG potential.
S2: the output signal is transmitted to a classic power grid current loop to obtain a modulation wave um。
Compare FIG. 3, θmIs the VSG phase angle, θinIs uinPhase of (1), Uind、UinqIs uinD, q-axis component of (I)d、Iq、Vd、VqAre respectively iabcAnd vabcThe respective d, q-axis components of,
Figure BDA0003039506170000041
for a given value of AC bus current umIs a modulated wave. SW1、SW2、SW3、SW4And SW5For pre-synchronizing the switches, K1And K2For pre-synchronizing the adjustment coefficients of angular velocity and voltage amplitude, thetavAnd thetagThe phase angle of the alternating current bus and the phase angle of the voltage of the power grid. When SW1、SW2And SW3Closed, SW4And SW5Entering into pre-synchronization mode when opening, and after the grid-connected breaker is closed, the SW1、SW2And SW3Is turned on, SW4And SW5And closing to enter a grid-connected operation mode.
S3: as shown in FIG. 4, VErefiAnd EiThe reference value and the feedback value of the filter capacitor voltage of the ith buck/boost converter are obtained; the buck/boost converters all adopt a voltage loop to control the voltage of a filter capacitor of the buck/boost converters, and the duty ratio of the ith buck/boost converter is VErefiSubtract EiThe modulation method is obtained through a PI link and a PWM link, and a cascade branch circuit based on a half-bridge module adopts nearest level approximation modulation based on voltage sequencing; modulated wave umA cascade branch circuit based on a half-bridge module is driven through an absolute value link, nearest level approximation modulation and voltage sequencing; if the modulation wave of a certain phase is greater than or equal to 0, the four thyristors at the upper left corner and the four thyristors at the lower right corner in the full-bridge module based on the bidirectional thyristors of the phase are conducted at the same time, otherwise, the four thyristors at the upper right corner and the four thyristors at the lower left corner are conducted at the same time.
The embodiment also provides a control system of the super capacitor energy storage device based on the cascaded half bridge, which comprises a network interface, a memory and a processor; the network interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements; a memory for storing computer program instructions executable on the processor; a processor for executing the steps of the finite element analysis method described above when executing the computer program instructions.
The present embodiment also provides a computer storage medium storing a computer program that when executed by a processor can implement the method described above. The computer-readable medium may be considered tangible and non-transitory. Non-limiting examples of a non-transitory tangible computer-readable medium include a non-volatile memory circuit (e.g., a flash memory circuit, an erasable programmable read-only memory circuit, or a mask read-only memory circuit), a volatile memory circuit (e.g., a static random access memory circuit or a dynamic random access memory circuit), a magnetic storage medium (e.g., an analog or digital tape or hard drive), and an optical storage medium (e.g., a CD, DVD, or blu-ray disc), among others. The computer program includes processor-executable instructions stored on at least one non-transitory tangible computer-readable medium. The computer program may also comprise or rely on stored data. The computer programs may include a basic input/output system (BIOS) that interacts with the hardware of the special purpose computer, a device driver that interacts with specific devices of the special purpose computer, one or more operating systems, user applications, background services, background applications, and the like.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims (9)

1. The utility model provides a super capacitor energy memory based on cascade half-bridge, its characterized in that, includes the single-phase branch road of the parallelly connected setting of a plurality of, single-phase branch road includes a plurality of energy storage unit, a plurality of buck/boost converter, based on the cascade branch road of half-bridge module, full-bridge module, export filter inductance and electric wire netting based on bidirectional thyristor, buck/boost converter is being connected to the energy storage unit, the cascade branch road based on half-bridge module includes a plurality of submodule pieces, buck/boost converter is connecting the submodule piece of cascading branch road, the cascade branch road based on half-bridge module is connected with full-bridge module based on bidirectional thyristor, full-bridge module based on bidirectional thyristor is established ties in proper order with export filter inductance, electric wire netting.
2. The super capacitor energy storage device based on the cascaded half bridge as claimed in claim 1, wherein the buck/boost converter comprises a filter inductor, a first upper switch tube, a first lower switch tube and a filter capacitor, the sub-modules of the cascaded branch comprise a second upper switch tube and a second lower switch tube, the energy storage unit is connected with the filter inductor and the emitter of the first lower switch tube, and the filter capacitor is connected with the collector of the second upper switch tube and the emitter of the second lower switch tube.
3. The super capacitor energy storage device based on half bridge cascade of claim 1, wherein the emitter of the switching tube under the kth half bridge circuit in the cascade branch based on half bridge module is connected to the emitter of the switching tube on the (k + 1) th half bridge circuit.
4. The super capacitor energy storage device based on half-bridge cascade of claim 1, wherein the cascade branch based on half-bridge module is connected to the full-bridge module based on triac through the base of the switch tube on the first half-bridge circuit and the emitter of the switch tube under the last half-bridge circuit.
5. The super-capacitor energy storage device based on the cascaded half-bridge as claimed in claim 1, wherein the full-bridge module based on the bidirectional thyristors is composed of a plurality of bridge arms, each bridge arm is a single-drive series bidirectional thyristor coupled in capacitance, and the simultaneous triggering of all thyristors of the bridge arms can be realized.
6. The super-capacitor energy storage device based on the cascaded half-bridge as claimed in claim 5, wherein the number of the bridge arms in the full-bridge module based on the bidirectional thyristors is four, if the modulation wave of a certain phase is greater than or equal to 0, the four thyristors in the upper left corner and the four thyristors in the lower right corner in the full-bridge module based on the bidirectional thyristors are turned on at the same time, otherwise, the four thyristors in the upper right corner and the four thyristors in the lower left corner are turned on at the same time.
7. A control method of a super capacitor energy storage device based on a cascade half bridge is characterized by comprising the following steps:
s1: acquiring an output signal by adopting a virtual synchronous machine algorithm;
s2: the output signal is transmitted to a classic power grid current loop to obtain a modulation wave um；
S3: the buck/boost converters all adopt a voltage loop to control the voltage of a filter capacitor of the buck/boost converters, a cascade branch circuit based on a half-bridge module adopts nearest level approximation modulation based on voltage sequencing, and a modulation wave umA cascade branch circuit based on a half-bridge module is driven through an absolute value link, nearest level approximation modulation and voltage sequencing; if the modulation wave of a certain phase is greater than or equal to 0, the four thyristors at the upper left corner and the four thyristors at the lower right corner in the full-bridge module based on the bidirectional thyristors of the phase are conducted at the same time, otherwise, the four thyristors at the upper right corner and the four thyristors at the lower left corner are conducted at the same time.
8. The method according to claim 7, wherein the virtual synchronous machine algorithm in step S1 is specifically:
Figure FDA0003039506160000021
wherein P, Q is the fundamental active and reactive power of the AC bus, P*、Q*Is active and reactive given, V*V is the rated voltage amplitude and the AC bus voltage amplitude, omega*、ωmRated and VSG electrical angular velocities, Dp、DqActive-frequency (P-f) and reactive-voltage (Q-V) droop coefficients, J, K inertia coefficients for active and reactive loops, EmIs the VSG potential.
9. A computer storage medium, characterized in that: the computer storage medium stores a program of a method of controlling a cascaded half-bridge based super-capacitor energy storage device, which when executed by at least one processor, implements the steps of a method of controlling a cascaded half-bridge based super-capacitor energy storage device of any of claims 7 and 8.
CN202110452975.8A 2021-04-26 2021-04-26 Super capacitor energy storage device based on cascaded half-bridge, control method thereof and storage medium Pending CN113162206A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109586601A (en) * 2018-12-03 2019-04-05 清华大学 A kind of mixed bridge circuit and its control method
CN110957912A (en) * 2019-10-31 2020-04-03 东南大学 Distributed energy storage device based on controllable direct current bus
CN111917123A (en) * 2020-07-06 2020-11-10 国网江苏省电力有限公司电力科学研究院 Super-capacitor energy storage device for auxiliary frequency modulation and control method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109586601A (en) * 2018-12-03 2019-04-05 清华大学 A kind of mixed bridge circuit and its control method
CN110957912A (en) * 2019-10-31 2020-04-03 东南大学 Distributed energy storage device based on controllable direct current bus
CN111917123A (en) * 2020-07-06 2020-11-10 国网江苏省电力有限公司电力科学研究院 Super-capacitor energy storage device for auxiliary frequency modulation and control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王作兴: "基于级联半桥拓扑的储能系统研究与设计", 全国优秀硕士学位论文全文库, pages 1 - 93 *

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