CN107222029A - Combined modular movable energy storage system - Google Patents
Combined modular movable energy storage system Download PDFInfo
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- CN107222029A CN107222029A CN201710661944.7A CN201710661944A CN107222029A CN 107222029 A CN107222029 A CN 107222029A CN 201710661944 A CN201710661944 A CN 201710661944A CN 107222029 A CN107222029 A CN 107222029A
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- Prior art keywords
- switch
- current transformers
- module
- bus
- static
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Classifications
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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
- H02J15/00—Systems for storing electric energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
Abstract
A kind of combined modular movable energy storage system provided in an embodiment of the present invention, energy-storage system uses modularized design in system, single topological structure module or multiple topological structure modules can individually be parallel to system operation and constitute EPS emergency power supplies, when detect electric network fault or quality of voltage is poor can not meet loading demand when, automatic rapid opening static switch, now, system is changed into islet operation by grid-connected, 380V/50Hz alternating current is provided to load, ensures that load is powered.Topological structure module can also interconnect the movable energy storage system for constituting series connection by dc bus, it is series between power supply and load, constitute on line type UPS uninterrupted power source, when the grid fails, automatic detection line voltage simultaneously judges, disconnects static switch in time, isolated island is formed, then DC/DC current transformers are opened, and are load uninterrupted power supply.The present invention can greatly improve the adaptability of parallel movable energy storage system, reduce online mobile UPS cost.
Description
Technical field
The present invention relates to movable energy storage system technical field, more particularly to combined modular movable energy storage system.
Background technology
As modern society increasingly strengthens the dependence of electric power energy, the swift and violent growth of need for electricity, power supply quality will
More and more higher is sought, the normal operation of normal life order and society that unexpected power-off will necessarily give people is damaged, especially
Be for load especially important in first order load, once interruption of power supply, it will cause great political fallout or economic loss.
As the main power of electric network emergency power supply unit, Mobile energy storage power-supply system has maneuverability, technology maturation, startup fast
Fast many advantages, such as, emergent electricity, urban distribution network, confrontation major natural disasters and the regional temporary electricity of power shortages are protected in politics
Etc. the effect that middle-size and small-size electricity consumption place plays increasingly significant.
It is general to use diesel-oil electric generator wagon as emergency power supply, but diesel-driven generator startup time length needs 5~30s, power supply electricity
Pressure, frequency fluctuation is big, efficiency is low, and main power source operation can only be done under off-network state, it is impossible to accomplish seamless switching, and bavin hair
Using also environment and noise pollution inevitably will be brought.Now, some mechanisms have developed and have applied portable great Rong
Energy-storage system is measured as emergency power supply, more based on demonstration.The system start-up time is short, mostly Millisecond, can realize simultaneously/from
The seamless switching of two kinds of operational modes of net.Portable Large Copacity energy-storage system both can be as power supply simultaneously, again can be with power distribution network
Interaction, charges in low power consumption, is discharged during peak of power consumption, reaches peak load shifting, improves the quality of power supply, integrates and make full use of
Electric energy, alleviate peak times of power consumption and power the purpose of pressure, be with a wide range of applications.
Existing movable energy storage system can be divided into two major classes by its structure：Parallel connection type movable energy storage system and tandem type are moved
Dynamic energy-storage system.The first kind is list DC/AC current transformer forms, and energy-accumulating medium is grid-connected by DC/DC and DC/AC current transformers, this
Class energy-storage system is parallel on ac bus, and can regarding a kind of EPS as, (Emergency Power Supply, emergency power is supplied
Give, emergency power supply), the general response time be 0.1 to 2 seconds, it is impossible to meet the requirement of uninterrupted load.Another kind of is double DC/AC
Back-to-back converter structure, energy-accumulating medium is linked into DC/AC DC sides by DC/DC, and the Cascade System is linked into power network, can
To regard UPS (Uninterruptible Power System/Uninterruptible Power Supply, uninterrupted electricity as
Source), the equipment general response time is less than 10ms, can meet the requirement of sensitive load, but its cost is high, running wastage is high and
And be only capable of applying to important load and ensure this single scene of powering, equipment is often left unused and wasted.
Therefore, these existing movable energy storage system application scenarios are single, and cost is high, is those skilled in the art's needs
The technical problem of solution.
The content of the invention
The embodiments of the invention provide combined modular movable energy storage system, for solving existing movable energy storage system
Application scenarios are single, and the high technical problem of cost.
A kind of combined modular movable energy storage system provided in an embodiment of the present invention, including：Two or more are opened up
Flutter construction module；
The topological structure module includes static switch SS, switch S0.1, switch S0.2, switch S0.3, DC/AC unsteady flow
Device, DC/DC current transformers, energy-accumulating medium, dc bus；
The second end of the static switch SS by one end of the switch S0.3 connections the first DC/AC current transformers,
The other end of the first DC/AC current transformers passes through the switch S0.2 connections dc bus, the dc bus connection
One end of the first DC/DC current transformers, the other end of the first DC/DC current transformers connects the energy-accumulating medium, described straight
Flow DC connecting end of the bus by the switch S0.1 connections topological structure module；
The static switch SS of one topological structure module the second end connects another topological structure module
Static switch SS first end.
Preferably, each topological structure module also includes battery management system and intelligent monitor system；
The battery management system connects the energy-accumulating medium；
The intelligent monitor system and the static switch SS, the switch S0.1, the switch S0.2, the switch
S0.3, the DC/AC current transformers, the DC/DC current transformers, battery management system connection；
The intelligent monitor system for being arranged at the different topological structure modules is connected with each other.
Preferably, the static switch SS of first topological structure module first end connection AC network, last
The static switch SS of the individual topological structure module the second end connection load.
Preferably, described two or two or more topological structure module is specially two topological structure modules, and respectively
One module and the second module；
First module includes static switch SS1.1, switch S1.1, switch S1.2, switch S1.3, the first DC/AC and become
Flow device, the first DC/DC current transformers, ultracapacitor, dc bus；
The second end of the static switch SS1.1 passes through the one of the switch S1.3 connections the first DC/AC current transformers
End, the other end of the first DC/AC current transformers is by the switch S1.2 connections dc bus, and the dc bus connects
One end of the first DC/DC current transformers is connect, the other end of the first DC/DC current transformers connects the ultracapacitor, institute
State DC connecting end of the dc bus by the switch S1.1 connections first module；
Second module includes static switch SS2.1, switch S2.1, switch S2.2, switch S2.3, the 2nd DC/AC and become
Flow device, the 2nd DC/DC current transformers, battery, dc bus；
The second end of the static switch SS2.1 passes through the one of the switch S2.3 connections the 2nd DC/AC current transformers
End, the other end of the 2nd DC/AC current transformers is by the switch S2.2 connections dc bus, and the dc bus connects
One end of the 2nd DC/DC current transformers is connect, the other end of the 2nd DC/DC current transformers connects the battery, the direct current
The DC connecting end that bus passes through the switch S2.1 connections second module；
The second end of the static switch SS1.1 connects the first end of the static switch SS2.1.
Preferably, the embodiment of the present invention also includes the first battery management system, the first intelligent monitor system, the second cell tube
Reason system, the second intelligent monitor system；
First battery management system connects the ultracapacitor；
First intelligent monitor system and the static switch SS1.1, the switch S1.1, the switch S1.2, institute
State switch S1.3, the first DC/AC current transformers, the first DC/DC current transformers, first battery management system connection；
Second battery management system connects the battery；
Second intelligent monitor system and the static switch SS2.1, the switch S2.1, the switch S2.2, institute
State switch S2.3, the 2nd DC/AC current transformers, the 2nd DC/DC current transformers, second battery management system connection；
First intelligent monitor system is connected with each other with second intelligent monitor system.
Preferably, the first end connection AC network of the static switch SS1.1, the second of the static switch SS2.1
End connection load.
Another combined modular movable energy storage system provided in an embodiment of the present invention, including the 3rd module and the 4th mould
Block；
3rd module includes static switch SS3.1, switch S3.1, switch S3.2, switch S3.3, the 3rd DC/AC and become
Flow device, the 3rd DC/DC current transformers, ultracapacitor, dc bus；
The second end of the static switch SS3.1 passes through the one of the switch S3.3 connections the 3rd DC/AC current transformers
End, the other end of the 3rd DC/AC current transformers is by the switch S3.2 connections dc bus, and the dc bus connects
One end of the 3rd DC/DC current transformers is connect, the other end of the 3rd DC/DC current transformers connects the ultracapacitor, institute
State DC connecting end of the dc bus by the switch S3.1 connections the 3rd module；
4th module includes static switch SS4.1, switch S4.1, switch S4.2, switch S4.3, the 4th DC/AC and become
Flow device, the 4th DC/DC current transformers, battery, dc bus；
The 4th end of the static switch SS4.1 passes through the one of the switch S4.3 connections the 4th DC/AC current transformers
End, the other end of the 4th DC/AC current transformers is by the switch S4.2 connections dc bus, and the dc bus connects
One end of the 4th DC/DC current transformers is connect, the other end of the 4th DC/DC current transformers connects the battery, the direct current
The DC connecting end that bus passes through the switch S4.1 connections the 4th module；
The DC connecting end of 3rd module connects the DC connecting end of the 4th module.
Preferably, the embodiment of the present invention also includes the 3rd battery management system, the 3rd intelligent monitor system, the 4th cell tube
Reason system, the 4th intelligent monitor system；
3rd battery management system connects the ultracapacitor；
3rd intelligent monitor system and the static switch SS3.1, the switch S3.1, the switch S3.2, institute
State switch S3.3, the 3rd DC/AC current transformers, the 3rd DC/DC current transformers, the 3rd battery management system connection；
4th battery management system connects the battery；
4th intelligent monitor system and the static switch SS4.1, the switch S4.1, the switch S4.2, institute
State switch S4.3, the 4th DC/AC current transformers, the 4th DC/DC current transformers, the 4th battery management system connection；
3rd intelligent monitor system is connected with each other with the 4th intelligent monitor system.
Preferably, the first end connection AC network of the static switch SS3.1, the second of the static switch SS4.1
End connection load.
Preferably,
During normal operation, the ultracapacitor of the 3rd module and the battery of the 4th module are in
SOC>80% state, the 3rd DC/DC current transformers and the 4th DC/DC current transformers are closed, and now power network is first passed around
3rd module is rectified into direct current, and inversion goes out 380V/50Hz alternating currents supply load to the 4th module again；
When the grid fails, the 3rd module is judged by detecting line voltage and disconnects static switch SS3.1 in time,
Form isolated island, then the 3rd DC/DC current transformers and the 4th DC/DC current transformers are opened, the 3rd module it is described
Ultracapacitor response is comparatively fast powered rapidly to load, and relatively stable alternating voltage is formed in the short time, the 4th module
The lithium battery capacity is larger, and the supply of electric power of long period is provided to load.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
Energy-storage system uses module in a kind of combined modular movable energy storage system provided in an embodiment of the present invention, system
Change design, single topological structure module or multiple topological structure modules can individually be parallel to system operation composition EPS and answer urgent telegram
Source, when detect electric network fault or quality of voltage is poor can not meet loading demand when, it is automatic rapid to open static switch, this
When, system is changed into islet operation by grid-connected, and 380V/50Hz alternating current is provided to load, ensures that load is powered.Topological structure
Module can also interconnect the movable energy storage system for constituting series connection by dc bus, be series between power supply and load, be formed in
Wire type UPS uninterrupted power sources, when the grid fails, automatic detection line voltage simultaneously judge, disconnect static switch in time, form lonely
Island, then DC/DC current transformers opening, is load uninterrupted power supply.The present invention can greatly improve parallel movable energy storage system
Adaptability, reduce online mobile UPS cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 shows for a kind of one embodiment of combined modular movable energy storage system provided in an embodiment of the present invention
It is intended to；
Fig. 2 be combined modular movable energy storage system provided in an embodiment of the present invention in topological structure module principle
Figure；
Fig. 3 is a kind of combined modular movable energy storage system control strategy figure provided in an embodiment of the present invention；
Fig. 4 shows for a kind of second embodiment of combined modular movable energy storage system provided in an embodiment of the present invention
It is intended to；
Fig. 5 is the signal of the embodiment of another combined modular movable energy storage system provided in an embodiment of the present invention
Figure；
Fig. 6 is another combined modular movable energy storage system control strategy figure provided in an embodiment of the present invention.
Embodiment
The embodiments of the invention provide combined modular movable energy storage system, for solving existing movable energy storage system
Application scenarios are single, and the high technical problem of cost.
To enable goal of the invention, feature, the advantage of the present invention more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of embodiment of the invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Referring to Fig. 1, a kind of first implementation of combined modular movable energy storage system provided in an embodiment of the present invention
Example, the present embodiment constitutes EPS emergency power supplies using topological structure wired in parallel to network system operation, including：Two or two
Above topological structure module；
Topological structure module includes static switch SS, switch S0.1, switch S0.2, switch S0.3, DC/AC current transformer, DC/
DC current transformers, energy-accumulating medium 002, dc bus；
Static switch SS the second end is by switching one end of the DC/AC current transformers of S0.3 connections the first, the first DC/AC unsteady flows
The other end of device connects one end of the first DC/DC current transformers, the first DC/ by switching S0.2 connection dc bus, dc bus
The other end connection energy-accumulating medium 002 of DC current transformers, dc bus is connected by switching the direct current of S0.1 connection topological structure modules
Connect end；
The static switch SS of one topological structure module the second end connects the static switch of another topological structure module
SS first end.
Each topological structure module also includes battery management system BMS and intelligent monitor system 001；
Battery management system BMS connections energy-accumulating medium 002；
Intelligent monitor system 001 and static switch SS, switch S0.1, switch S0.2, switch S0.3, DC/AC current transformer,
DC/DC current transformers, battery management system BMS connections；
The intelligent monitor system 001 for being arranged at different topology structure module is connected with each other.
The static switch SS of first topological structure module first end connection AC network, last topological structure mould
The static switch SS of block the second end connection load 003.
During normal operation, the static switch SS in each topological structure module is closed, opening in each topological structure module
Close the switch S0.1 closures in S0.2, switch S0.3 closures, each topological structure module.
It should be noted that 001 expression intelligent monitor system in Fig. 1,002 represents energy-accumulating medium, and 003 represents load, BMS
Battery management system is represented, DC/DC represents DC/DC current transformers, and the structure between switch S0.2 and switch S0.3 is DC/AC unsteady flows
Device, the two big dotted line frame in left and right is two topological structure modules as example, and four middle points represent middle and omit some
Individual topological structure module connection.
A kind of combined modular movable energy storage system provided in an embodiment of the present invention, including topological structure module, each
Connected between topological structure module by static switch, form parallel-connection structure, combined type module can be worked as EPS emergency power supplies
Change that movable energy storage system detects electric network fault or quality of voltage is poor when can not meet loading demand, it is automatic rapid to open static
Switch, now, system is changed into islet operation by grid-connected, and 380V/50Hz alternating current is provided to load, ensures that load is powered.
Energy-storage system uses module in a kind of combined modular movable energy storage system provided in an embodiment of the present invention, system
Change design, single topological structure module or multiple topological structure modules can individually be parallel to system operation composition EPS and answer urgent telegram
Source, when detect electric network fault or quality of voltage is poor can not meet loading demand when, it is automatic rapid to open static switch, this
When, system is changed into islet operation by grid-connected, and 380V/50Hz alternating current is provided to load, ensures that load is powered.
Opened up referring to Fig. 2, topological structure module is actually the two-way three-phase bridge converter with direct current output interface
Structure is flutterred, as shown in Figure 2.DC side energy-accumulating medium all configures the two-way DC/DC circuits of Bi Buck-Boost, with DC/AC DC sides
Electric capacity parallel running.
Two-way DC/DC circuits have unsteady flow, a voltage regulation function, and energy can realize super hold and lithium battery fills with two-way flow
Electric discharge operation.Two kinds of different energy-storage travelling wave tubes of terminal voltage are connected by it, every kind of energy storage device is directly controlled, are maintained simultaneously
DC bus-bar voltage is constant；And the charging and discharging curve of lithium battery can be optimized, extend its service life；Lithium battery and super capacitor can
With deep discharge, therefore its stored energy can make full use of；Using DC/DC EMS can also be made more flexibly to match somebody with somebody
Put.AC is configured with three phase static switch, realizes the quick of power supply or load (mode of connection can be mains side or load side)
Input is cut off.
Expansion interface is added in dc bus, on the one hand by the control to DC/DC converters, movable energy storage system is made
For the dc source or DC load of adjustable voltage, can be applied should in specific scene such as direct current distribution, electric automobile
Boost charge etc.；In addition, multimode is connected by expansion interface, flexibly controlled, may be constructed by DC/DC and DC/AC current transformers
Back-to-back energy-storage system.
As can be seen that static switch is the antiparallel structure of (voltage stabilizing) diode in Fig. 2.
Movable energy storage system can be achieved in the application with many scenes of electricity consumption using the topological structure.Primarily as many
Module composition parallel connection type movable energy storage system (one embodiment and second embodiment) and Dual module constitute tandem type movement
Energy-storage system (UPS) (embodiment of another combined modular movable energy storage system).
Each topological structure wired in parallel is on ac bus, and the system can realize the application of many scenes according to demand：
1st, as EPS emergency power supplies.When modularization energy-storage system detects electric network fault or quality of voltage is poor to expire
During sufficient loading demand, the automatic static switch SS for opening first topological structure module rapidly (open by the static state of connection AC network
Close SS), now, system is changed into islet operation by grid-connected.Multimode is incorporated into the power networks Mode change for V/F by PQ current sources immediately
Voltage source operational mode, 380V/50Hz alternating current is provided to load, ensures that load is powered.But, the pattern has certain cut
Change the time (0.1 to 2 seconds), it is impossible to ensure the uninterrupted power supply of important load.
2nd, other application scene can be widely applied to.Furthermore, it is possible to select different application scenarios according to demand, such as cut
Peak load, tou power price, the smooth scene such as exert oneself.It is not described in detail herein.
Referring to Fig. 3, a kind of combined modular movable energy storage system control strategy such as Fig. 3 provided in an embodiment of the present invention
It is shown.The system mainly realized after the emergency power supply function of load, system operation, and whether just line voltage is judged by sensor
Often (decompression, Voltage Drop, three-phase imbalance, harmonic wave etc.), if electric network state is normal, SS static switches closure (connection alternating current
The static switch SS closures of net), constitute grid-connected system.
Now, according to detection energy-accumulating medium SOC, if less than 20%, into grid-connected charge mode：The AC/DC of module becomes
Stream device works in grid-connected rectification mode, using PQ control strategies, the control of output current of converter inner ring, DC bus-bar voltage outer shroud
Control, DC/DC current transformers are worked in Buck states, controlled using constant current voltage limiting.
If SOC is more than 20%, discharge mode can be entered：A variety of applications can be selected according to scene, first when selection is treated
When machine is standby, it should ensure that energy storage is in high potential, it is stand-by immediately if SOC is more than 80%, enter if SOC is less than 80%
Charge mode：The AC/DC current transformers of module work in grid-connected rectification mode, using PQ control strategies, in output current of converter
Ring is controlled, and DC bus-bar voltage outer shroud control, DC/DC current transformers are worked in Buck states, controlled using constant current voltage limiting.
When selecting the other application in addition to stand-by, system can calculate output current instruction according to application scenarios
Value (different scenes command value is different), then enters grid-connected discharge mode or grid-connected charge mode according to instruction system.It is grid-connected to put
Power mode is：AC/DC works in parallel network reverse pattern, using PQ control strategies, DC bus-bar voltage outer shroud, output current inner ring
Control, DC/DC current transformers work in Boost states, constant-current source control.Grid-connected charge mode is：The AC/DC current transformer works of module
Make in grid-connected rectification mode, using PQ control strategies, the control of output current of converter inner ring, DC bus-bar voltage outer shroud is controlled,
DC/DC current transformers work in Buck states, are controlled using constant current voltage limiting.
If electric network state is abnormal, SS static switches open (the static switch SS of connection AC network is opened), constitute off-network
System.Now, energy storage SOC is detected, if SOC is more than 20%, system enters off-network discharge mode：AC/DC is operated in off-network inversion
State, using V/F control strategies, the control of ac bus outer voltage, the control of DC bus current inner ring.If SOC is less than 20%,
Alarm condition is immediately entered, off-network discharge mode is gone successively to.
Above is to a kind of one embodiment of combined modular movable energy storage system provided in an embodiment of the present invention
It is described in detail, below by second of a kind of combined modular movable energy storage system provided in an embodiment of the present invention
Embodiment is described in detail.
Referring to Fig. 4, a kind of second implementation of combined modular movable energy storage system provided in an embodiment of the present invention
Example, the present embodiment constitutes EPS emergency power supplies using two topological structure wired in parallel to network system operation, including：First mould
The module 20 of block 10 and second；
First module 10 includes static switch SS1.1, switch S1.1, switch S1.2, switch S1.3, the first DC/AC unsteady flows
Device, the first DC/DC current transformers, ultracapacitor 101, dc bus；
Static switch SS1.1 the second end is by switching one end of the DC/AC current transformers of S1.3 connections the first, the first DC/AC
The other end of current transformer connects one end of the first DC/DC current transformers, first by switching S1.2 connection dc bus, dc bus
The other end connection ultracapacitor 101 of DC/DC current transformers, dc bus is by switching the direct current of the first module of S1.1 connections 10
Connection end；
Second module 20 includes static switch SS2.1, switch S2.1, switch S2.2, switch S2.3, the 2nd DC/AC unsteady flows
Device, the 2nd DC/DC current transformers, battery 202, dc bus；
Static switch SS2.1 the second end is by switching one end of the DC/AC current transformers of S2.3 connections the 2nd, the 2nd DC/AC
The other end of current transformer connects one end of the 2nd DC/DC current transformers, second by switching S2.2 connection dc bus, dc bus
The other end connection battery 202 of DC/DC current transformers, dc bus is connected by switching the direct current of the second module of S2.1 connections 20
End；
Static switch SS1.1 the second end connection static switch SS2.1 first end.
The embodiment of the present invention also includes the first battery management system 10BMS, the first intelligent monitor system 101, the second battery
Management system 20BMS, the second intelligent monitor system 201；
First battery management system 10BMS connections ultracapacitor 102；
First intelligent monitor system 101 and static switch SS1.1, switch S1.1, switch S1.2, switch S1.3, the first DC/
AC current transformers, the first DC/DC current transformers, the first battery management system 10BMS connections；
Second battery management system 20BMS connections battery 202；
Second intelligent monitor system 201 and static switch SS2.1, switch S2.1, switch S2.2, switch S2.3, the 2nd DC/
AC current transformers, the 2nd DC/DC current transformers, the second battery management system 20BMS connections；
First intelligent monitor system 101 is connected with each other with the second intelligent monitor system 201.
Static switch SS1.1 first end connection AC network, static switch SS2.1 the second end connection load 003.
During normal operation, static switch SS1.1 and SS2.1 closure, switch S1.2, S2.2, S1.3, S2.3 closure, switch
S1.1 and switch S2.1 closures.
A kind of control plan of second embodiment of combined modular movable energy storage system provided in an embodiment of the present invention
Slightly essentially identical with one embodiment, here is omitted.
Above is to a kind of second embodiment of combined modular movable energy storage system provided in an embodiment of the present invention
It is described in detail, below by the implementation to another combined modular movable energy storage system provided in an embodiment of the present invention
Example is described in detail.
Referring to Fig. 5, the embodiment of another combined modular movable energy storage system provided in an embodiment of the present invention, this
Embodiment uses two topological structure block coupled in series between power supply and load, composition on line type UPS uninterrupted power source, including the
Three modules 30 and the 4th module 40；
3rd module 30 includes static switch SS3.1, switch S3.1, switch S3.2, switch S3.3, the 3rd DC/AC unsteady flows
Device, the 3rd DC/DC current transformers, ultracapacitor 302, dc bus；
Static switch SS3.1 the second end is by switching one end of the DC/AC current transformers of S3.3 connections the 3rd, the 3rd DC/AC
The other end of current transformer connects one end of the 3rd DC/DC current transformers, the 3rd by switching S3.2 connection dc bus, dc bus
The other end connection ultracapacitor 302 of DC/DC current transformers, dc bus is by switching the direct current of the module 30 of S3.1 connections the 3rd
Connection end；
4th module 40 includes static switch SS4.1, switch S4.1, switch S4.2, switch S4.3, the 4th DC/AC unsteady flows
Device, the 4th DC/DC current transformers, battery 402, dc bus；
Static switch SS4.1 the 4th end is by switching one end of the DC/AC current transformers of S4.3 connections the 4th, the 4th DC/AC
The other end of current transformer connects one end of the 4th DC/DC current transformers, the 4th by switching S4.2 connection dc bus, dc bus
The other end connection battery 402 of DC/DC current transformers, dc bus is connected by switching the direct current of the module 40 of S4.1 connections the 4th
End；
The DC connecting end of 3rd module 30 connects the DC connecting end of the 4th module 40.
The embodiment of the present invention also includes the 3rd battery management system 30BMS, the 3rd intelligent monitor system 301, the 4th battery
Management system 40BMS, the 4th intelligent monitor system 401；
3rd battery management system 30BMS connections ultracapacitor 302；
3rd intelligent monitor system 301 and static switch SS3.1, switch S3.1, switch S3.2, switch S3.3, the 3rd DC/
AC current transformers, the 3rd DC/DC current transformers, the 3rd battery management system 30BMS connections；
4th battery management system 40BMS connections battery 402；
4th intelligent monitor system 401 and static switch SS4.1, switch S4.1, switch S4.2, switch S4.3, the 4th DC/
AC current transformers, the 4th DC/DC current transformers, the 4th battery management system 40BMS connections；
3rd intelligent monitor system 301 is connected with each other with the 4th intelligent monitor system 401.
Static switch SS3.1 first end connection AC network, static switch SS4.1 the second end connection load 003.
During normal operation, the battery 402 of the module 40 of ultracapacitor 302 and the 4th of the 3rd module 30 is in SOC>80%
State, the 3rd DC/DC current transformers and the 4th DC/DC current transformers close, and now power network first passes around the 3rd module 30 and is rectified into
Direct current, inversion goes out 380V/50Hz alternating currents supply load to the 4th module 40 again；
When the grid fails, the 3rd module 30 is judged by detecting line voltage and disconnects static switch SS3.1 in time, shape
Into isolated island, then the 3rd DC/DC current transformers and the 4th DC/DC current transformers are opened, and the ultracapacitor 302 of the 3rd module 30 is responded
Comparatively fast powered to load rapidly, form relatively stable alternating voltage in the short time, the capacity of lithium battery 402 of the 4th module 40 compared with
Greatly, the supply of electric power of long period is provided to load.
During normal operation, static switch SS3.1 and SS4.1 closure, S3.2, S4.2, S3.3, S4.3 closure, S3.1 and
S4.1 is closed.
Another combined modular movable energy storage system provided in an embodiment of the present invention, including two topological structure moulds
Block, two topological structure modules are connected by DC connecting end, form cascaded structure, when the grid fails, automatic detection power network
Voltage simultaneously judges, disconnects static switch in time, forms isolated island, then DC/DC current transformers are opened, and are that load is powered.Topological structure
Module interconnects the movable energy storage system for constituting series connection by dc bus, is series between power supply and load, constitutes on line type UPS
Uninterrupted power source, when the grid fails, automatic detection line voltage simultaneously judge, disconnect static switch in time, form isolated island, then
DC/DC current transformers are opened, and are load uninterrupted power supply.The present invention can greatly improve the adaptation of parallel movable energy storage system
Property, reduce online mobile UPS cost.
3rd module 30 and the DC side expansion structure (DC connecting end) of the 4th module 40 are connected especially by direct current line wheel.
Now, two module composition back-to-back converters, energy-accumulating medium is coupled in parallel to back-to-back by DC/DC current transformers
On the dc bus of current transformer, on line type UPS is constituted between Cascade System access power network and important load.
During normal operation, the battery 402 of the module 40 of ultracapacitor 302 and the 4th of the 3rd module 30 is in SOC>80%
State, DC/DC close, now power network first passes around the 3rd module 30 and is rectified into direct current, and inversion goes out the 4th module 40 again
380V/50Hz alternating currents supply load.When the grid fails, the 3rd module 30 is by detecting that line voltage judges and disconnected in time
Static switch SS3.1, forms isolated island, and then DC/DC is opened, the ultracapacitor 302 of the 3rd module 30 respond it is very fast rapidly to
Load is powered, and relatively stable alternating voltage is formed in the short time, and the capacity of lithium battery 402 of the 4th module 40 is larger, is carried to load
For the supply of electric power of long period.
Under the method for operation, system response time is very fast, and 10ms is smaller than substantially, it is ensured that important load it is uninterrupted
Power supply, can apply and protect the scenes such as electricity, momentous conference and key activities guarantor's electricity in military affairs guarantor electricity, politics.
Another combined modular movable energy storage system control strategy that the embodiment of the present invention was provided is as shown in Figure 6
(the 1# modules in Fig. 6 are the 3rd module, and 2# modules are the 4th module).The system mainly realizes the uninterrupted power supply of load.
Judge whether line voltage is normal (decompression, Voltage Drop, three-phase imbalance, harmonic wave etc.) by sensor, if electric
Net state is normal, the 3rd module static switch SS3.1 closures.
The 3rd module 30 and the energy storage SOC of the 4th module 40 are detected, grid-connected charge mode is entered if less than 80%.3rd mould
Block AC/DC is grid-connected rectification mode, and AC/DC uses PQ control strategies, the control of output current of converter inner ring, DC bus-bar voltage
Outer shroud is controlled.The DC/DC current transformers of 3rd module and the 4th module are operated in Buck patterns, are charged using constant current voltage limiting pattern.
4th modules A C/DC current transformers are operated in inverter mode, are controlled using VF：Ac bus outer voltage is controlled, dc bus electricity
Flow inner ring control.Under the method for operation, the 3rd AC/DC current transformers power is more than the 4th AC/DC current transformers, for being filled to energy storage
Electricity.
If SOC >=80%, energy storage is in high potential.Now, the 3rd modules A C/DC is grid-connected rectification mode, and AC/DC becomes
Flow device and use PQ control strategies, the control of output current of converter inner ring, the control of DC bus-bar voltage outer shroud.The AC/ of 4th module
DC current transformers are operated in inverter mode, using VF control strategies, the control of ac bus outer voltage, DC bus current inner ring control
System.Close the 3rd DC/DC current transformers and the 4th DC/DC current transformers.Under this method of operation, the 3rd AC/DC current transformer power etc.
In the 4th AC/DC current transformers, for giving load energy supply.
If it is determined that line voltage is abnormal, then the 3rd module static switch SS3.1 is opened immediately.Now, the 3rd AC/DC is closed
Current transformer, opens the 3rd module DC/DC current transformers, and constant-current source control is operated in Boost states, and the 4th modules A C/DC work is held
It is continuous to be operated in inverter mode, controlled using VF：Ac bus outer voltage is controlled, the control of DC bus current inner ring, utilizes the
The quick inversion of the characteristics of three module ultracapacitor quick responses goes out 380V/50Hz voltages, quick powering load.Open the 4th
Module DC/DC current transformers, constant-current source control, are operated in Boost states, lithium battery group puts into operation, and Large Copacity is provided to load
Power reserve.
Under this mode of operation, the AC/DC current transformers of the 4th module always work at V/F inverter modes, can continue steady
Fixed provides electric power to load, therefore the response time is smaller than 10ms substantially, it is ensured that the uninterrupted power supply of important load.
Described above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before
Embodiment is stated the present invention is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a kind of combined modular movable energy storage system, it is characterised in that including：Two or more topological structure moulds
Block；
The topological structure module includes static switch SS, switch S0.1, switch S0.2, switch S0.3, DC/AC current transformer, DC/
DC current transformers, energy-accumulating medium, dc bus；
The second end of the static switch SS is described by one end of the switch S0.3 connections the first DC/AC current transformers
The other end of first DC/AC current transformers is by the switch S0.2 connections dc bus, and the dc bus connection is described
One end of first DC/DC current transformers, the other end of the first DC/DC current transformers connects the energy-accumulating medium, and the direct current is female
The DC connecting end that line passes through the switch S0.1 connections topological structure module；
The static switch SS of one topological structure module the second end connects the static state of another topological structure module
Switch SS first end.
2. a kind of combined modular movable energy storage system according to claim 1, it is characterised in that each topology
Construction module also includes battery management system and intelligent monitor system；
The battery management system connects the energy-accumulating medium；
The intelligent monitor system and the static switch SS, the switch S0.1, the switch S0.2, the switch S0.3,
The DC/AC current transformers, the DC/DC current transformers, battery management system connection；
The intelligent monitor system for being arranged at the different topological structure modules is connected with each other.
3. a kind of combined modular movable energy storage system according to claim 1, it is characterised in that opened up described in first
Flutter the static switch SS of construction module first end connection AC network, the static switch of last topological structure module
SS the second end connection load.
4. a kind of combined modular movable energy storage system according to claim 1, it is characterised in that described two or two
Individual above topological structure module is specially two topological structure modules, respectively the first module and the second module；
First module include static switch SS1.1, switch S1.1, switch S1.2, switch S1.3, the first DC/AC current transformers,
First DC/DC current transformers, ultracapacitor, dc bus；
The second end of the static switch SS1.1 passes through one end of the switch S1.3 connections the first DC/AC current transformers, institute
The other end of the first DC/AC current transformers is stated by the switch S1.2 connections dc bus, the dc bus connects institute
One end of the first DC/DC current transformers is stated, the other end of the first DC/DC current transformers connects the ultracapacitor, described straight
Flow DC connecting end of the bus by the switch S1.1 connections first module；
Second module include static switch SS2.1, switch S2.1, switch S2.2, switch S2.3, the 2nd DC/AC current transformers,
2nd DC/DC current transformers, battery, dc bus；
The second end of the static switch SS2.1 passes through one end of the switch S2.3 connections the 2nd DC/AC current transformers, institute
The other end of the 2nd DC/AC current transformers is stated by the switch S2.2 connections dc bus, the dc bus connects institute
One end of the 2nd DC/DC current transformers is stated, the other end of the 2nd DC/DC current transformers connects the battery, the dc bus
Pass through the DC connecting end of the switch S2.1 connections second module；
The second end of the static switch SS1.1 connects the first end of the static switch SS2.1.
5. a kind of combined modular movable energy storage system according to claim 4, it is characterised in that also including the first electricity
Pond management system, the first intelligent monitor system, the second battery management system, the second intelligent monitor system；
First battery management system connects the ultracapacitor；
First intelligent monitor system and the static switch SS1.1, the switch S1.1, the switch S1.2, described open
Close S1.3, the first DC/AC current transformers, the first DC/DC current transformers, first battery management system connection；
Second battery management system connects the battery；
Second intelligent monitor system and the static switch SS2.1, the switch S2.1, the switch S2.2, described open
Close S2.3, the 2nd DC/AC current transformers, the 2nd DC/DC current transformers, second battery management system connection；
First intelligent monitor system is connected with each other with second intelligent monitor system.
6. a kind of combined modular movable energy storage system according to claim 4, it is characterised in that
The first end connection AC network of the static switch SS1.1, the second end connection load of the static switch SS2.1.
7. another combined modular movable energy storage system, it is characterised in that including the 3rd module and the 4th module；
3rd module include static switch SS3.1, switch S3.1, switch S3.2, switch S3.3, the 3rd DC/AC current transformers,
3rd DC/DC current transformers, ultracapacitor, dc bus；
The second end of the static switch SS3.1 passes through one end of the switch S3.3 connections the 3rd DC/AC current transformers, institute
The other end of the 3rd DC/AC current transformers is stated by the switch S3.2 connections dc bus, the dc bus connects institute
One end of the 3rd DC/DC current transformers is stated, the other end of the 3rd DC/DC current transformers connects the ultracapacitor, described straight
Flow DC connecting end of the bus by the switch S3.1 connections the 3rd module；
4th module include static switch SS4.1, switch S4.1, switch S4.2, switch S4.3, the 4th DC/AC current transformers,
4th DC/DC current transformers, battery, dc bus；
The 4th end of the static switch SS4.1 passes through one end of the switch S4.3 connections the 4th DC/AC current transformers, institute
The other end of the 4th DC/AC current transformers is stated by the switch S4.2 connections dc bus, the dc bus connects institute
One end of the 4th DC/DC current transformers is stated, the other end of the 4th DC/DC current transformers connects the battery, the dc bus
Pass through the DC connecting end of the switch S4.1 connections the 4th module；
The DC connecting end of 3rd module connects the DC connecting end of the 4th module.
8. another combined modular movable energy storage system according to claim 7, it is characterised in that also including the 3rd
Battery management system, the 3rd intelligent monitor system, the 4th battery management system, the 4th intelligent monitor system；
3rd battery management system connects the ultracapacitor；
3rd intelligent monitor system and the static switch SS3.1, the switch S3.1, the switch S3.2, described open
Close S3.3, the 3rd DC/AC current transformers, the 3rd DC/DC current transformers, the 3rd battery management system connection；
4th battery management system connects the battery；
4th intelligent monitor system and the static switch SS4.1, the switch S4.1, the switch S4.2, described open
Close S4.3, the 4th DC/AC current transformers, the 4th DC/DC current transformers, the 4th battery management system connection；
3rd intelligent monitor system is connected with each other with the 4th intelligent monitor system.
9. another combined modular movable energy storage system according to claim 7, it is characterised in that
The first end connection AC network of the static switch SS3.1, the second end connection load of the static switch SS4.1.
10. another combined modular movable energy storage system according to claim 7, it is characterised in that
During normal operation, the ultracapacitor of the 3rd module and the battery of the 4th module are in SOC>
80% state, the 3rd DC/DC current transformers and the 4th DC/DC current transformers are closed, and now power network first passes around described
3rd module is rectified into direct current, and inversion goes out 380V/50Hz alternating currents supply load to the 4th module again；
When the grid fails, the 3rd module is judged by detecting line voltage and disconnects static switch SS3.1 in time, is formed
Isolated island, then the 3rd DC/DC current transformers and the 4th DC/DC current transformers open, the 3rd module it is described super
Capacitor response is comparatively fast powered rapidly to load, and relatively stable alternating voltage, the 4th module lithium battery are formed in the short time
Capacity is larger, and the supply of electric power of long period is provided to load.
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| CN108988332A (en) * | 2018-08-02 | 2018-12-11 | 四川航电微能源有限公司 | A kind of double-bus power supply apparatus for fast switching and its control method |
| CN109755951A (en) * | 2019-03-19 | 2019-05-14 | 南京南瑞继保电气有限公司 | A kind of modular multilevel energy-storage system and its control method |
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| US10523018B2 (en) | 2016-07-01 | 2019-12-31 | Constance Stacey | Modular energy storage systems and related methods |
| WO2019109162A1 (en) * | 2017-12-08 | 2019-06-13 | Constance Stacey | Modular energy storage systems and related methods |
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| CN111463886A (en) * | 2019-01-18 | 2020-07-28 | 艾思得电子香港有限公司 | Method and device for rapidly switching static transfer switch, storage medium and terminal equipment |
| CN111463886B (en) * | 2019-01-18 | 2022-03-08 | 艾思得电子香港有限公司 | Method and device for rapidly switching static transfer switch, storage medium and terminal equipment |
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| CN110401213A (en) * | 2019-06-26 | 2019-11-01 | 中国电力科学研究院有限公司 | A kind of multi-mode movable energy storage system and its control method |
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| CN110649651B (en) * | 2019-09-09 | 2020-12-11 | 珠海格力电器股份有限公司 | Alternating current-direct current bidirectional converter, adaptive method thereof and electronic device |
| CN111224413B (en) * | 2020-03-12 | 2021-09-28 | 国家电网有限公司 | Emergency adjusting system for three-phase electric unbalance |
| CN111224413A (en) * | 2020-03-12 | 2020-06-02 | 国家电网有限公司 | Emergency adjusting system for three-phase electric unbalance |
| CN112467769A (en) * | 2020-11-23 | 2021-03-09 | 阳光电源股份有限公司 | Modularized pre-installed energy storage system |
| CN113410904A (en) * | 2021-03-29 | 2021-09-17 | 广东电网有限责任公司电力科学研究院 | Multi-module parallel emergency power supply and control method |
| CN113193645A (en) * | 2021-04-22 | 2021-07-30 | 四川荣创新能动力系统有限公司 | Control method of hydrogen fuel cell emergency power supply system |
| CN113193645B (en) * | 2021-04-22 | 2022-08-09 | 四川荣创新能动力系统有限公司 | Control method of hydrogen fuel cell emergency power supply system |
| CN113437789A (en) * | 2021-08-27 | 2021-09-24 | 南京力骏新能源储能研究院有限公司 | Energy storage system with reconfigurable topology, mobile energy storage shelter and multi-element application method thereof |
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