CN106877371A - A kind of control method of the modular multi-level converter with energy-storage function - Google Patents
A kind of control method of the modular multi-level converter with energy-storage function Download PDFInfo
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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Abstract
The present invention discloses a kind of control method of the modular multi-level converter with energy-storage function, wherein current transformer includes three facies units, each facies unit includes upper bridge arm, lower bridge arm, upper bridge arm inductance, lower bridge arm inductance, upper and lower bridge arm is in series by half-bridge submodule and the mixing of class full-bridge energy storage submodule；Methods described according to often treating each other output order voltage waveform, it is determined that in per phase bridge arm each submodule modulating wave, the modulating wave of its Neutron module includes half-bridge submodule modulating wave and class full-bridge energy storage submodule modulating wave；Generation control signal is compared according to the carrier wave of each submodule and the modulating wave of submodule in every phase bridge arm, is controlled respectively per each submodule input in phase bridge arm or is cut off.The above-mentioned modular multi-level converter with energy-storage function can increase inertia for new energy resources system, and battery charging and discharging electric current used by energy storage is smoothed, and voltage class is relatively low, has ensured the Effec-tive Function and security of battery.
Description
Technical field
The invention belongs to technical field of electric automation equipment, specifically, being related to a kind of modularization with energy-storage function
The control method of Multilevel Inverters.
Background technology
In existing technology, be directly parallel in battery by submodule electric capacity by the submodule with energy-storage function so that
Battery bears the pulsating current of one times of power frequency and two times of power frequencies, and the Effec-tive Function and overall life cycle cost to battery are unfavorable；Together
When, actual condition Neutron module capacitance voltage is generally higher than 1500V voltage class, the high magnification electricity with lithium ion battery as representative
Pond, based on the reason for battery charge state equilibrium and error protection, from cost and security consideration, is extremely difficult to series connection so high
Voltage.
Through retrieval, the Chinese patent application of Publication No. 104917418A uses battery current the invention provides one kind
The accumulation energy type modular multi-level converter of independent control, its submodule includes：One half-bridge module, a Support Capacitor and
Individual energy-storage battery.By the independent control to battery current, battery utilization rate and service life are improved.
The Chinese patent application of Publication No. 103580050A, the invention is related to a kind of many level lithium electricity of high-power modular
Pond energy accumulation current converter device, its submodule is H bridge type energy accumulation current converter modules.By using submodule quantity reduction cell voltage
The mode of grade realizes large power energy storage.
Above-mentioned patent can not solve the problems, such as cell voltage grade, and the submodule for using is more and can not realize energy storage, while
Cell voltage is relatively low；Secondly, the sub-modular structure that above-mentioned patent is proposed all uses scheme of the cell parallel by DC capacitor, electricity
Pond will necessarily bear the pulsating current of one times of power frequency and two times of power frequencies, to the Effec-tive Function and overall life cycle cost of battery not
Profit.
The content of the invention
For defect of the prior art, improve battery life and utilize from topology it is an object of the invention to provide one kind
Rate, and the control method of the accumulation energy type modular multi-level converter of inertia is provided for new energy resources system.
The present invention provides a kind of control method of the modular multi-level converter with energy-storage function, wherein：
The current transformer include three facies units, each facies unit include upper bridge arm, lower bridge arm, upper bridge arm inductance, under
Bridge arm inductance；The positive terminal of the upper bridge arm as facies unit direct current outlet positive terminal；The negative pole end of the upper bridge arm and institute
The one end for stating bridge arm inductance is connected；The other end of the upper bridge arm inductance is connected with one end of the lower bridge arm inductance, as
The exchange leading-out terminal of facies unit, and current-limiting reactor is connected to power network；The other end of the lower bridge arm inductance and the lower bridge arm
Positive terminal be connected；The negative pole end of the lower bridge arm as facies unit direct current outlet negative pole end；It is described in three facies units
Upper bridge arm, the lower bridge arm are in series by half-bridge submodule and the mixing of class full-bridge energy storage submodule；
Include multiple gate-controlled switch devices, all gate-controlled switches in the half-bridge submodule and class full-bridge energy storage submodule
Device uses unipolarity phase-shifting carrier wave sinusoidal pulse width modulation method, with the conservation of energy, one power frequency period of submodule capacitor voltage
Premised on stabilization and linear modulation, the modulation ratio for obtaining half-bridge submodule and class full-bridge energy storage submodule is calculated；According to often treating each other
Output order voltage waveform, it is determined that each half-bridge submodule and class full-bridge energy storage submodule in upper bridge arm, lower bridge arm per phase
Modulating wave, the carrier wave and half-bridge of each half-bridge submodule and class full-bridge energy storage submodule in the upper bridge arm, lower bridge arm according to every phase
The modulating wave of submodule and class full-bridge energy storage submodule is compared generation control signal, control respectively upper bridge arm per phase, under
Input of each half-bridge submodule with class full-bridge energy storage submodule or cut-out in bridge arm.
Preferably, described half-bridge submodule, including：It is first direct current capacitors, the first gate-controlled switch device, second controllable
Switching device, the first fly-wheel diode, the second fly-wheel diode；Wherein：
The first gate-controlled switch device, the second gate-controlled switch device colelctor electrode respectively with first afterflow two
Pole pipe, the negative electrode of second fly-wheel diode are connected；The first gate-controlled switch device, the second gate-controlled switch device
Anode of the emitter stage respectively with first fly-wheel diode, second fly-wheel diode is connected；First gate-controlled switch
The colelctor electrode of device is connected with the anode of first direct current capacitors；The emitter stage of the second gate-controlled switch device with it is described
The negative electrode of the first direct current capacitors is connected；First controllable devices, the grid of the second controllable devices is connected with control circuit.
Preferably, described class full-bridge energy storage submodule, including：Second direct current capacitors, battery, power sense cell, the 3rd
Gate-controlled switch device, the 4th gate-controlled switch device, the 5th gate-controlled switch device, the 6th gate-controlled switch device, and the 3rd afterflow
Diode, the 4th fly-wheel diode, the 5th fly-wheel diode, the 6th fly-wheel diode；Wherein：
The 3rd gate-controlled switch device, the 4th gate-controlled switch device, the 5th gate-controlled switch device, described
The colelctor electrode of six gate-controlled switch devices continues with the 3rd fly-wheel diode, the 4th fly-wheel diode, the described 5th respectively
Stream diode, the negative electrode of the 6th fly-wheel diode are connected；The 3rd gate-controlled switch device, the 4th gate-controlled switch device
Part, the 5th gate-controlled switch device, the 6th gate-controlled switch device emitter stage respectively with the 3rd fly-wheel diode,
4th fly-wheel diode, the 5th fly-wheel diode, the anode of the 6th fly-wheel diode are connected；Described 3rd can
The colelctor electrode for controlling switching device is connected with the anode of second direct current capacitors；The emitter stage of the 4th gate-controlled switch device
Negative electrode with second direct current capacitors, the battery is connected；The emitter stage of the 3rd gate-controlled switch device is complete as class
The positive terminal of bridge energy storage submodule；The emitter stage of the 5th gate-controlled switch device is connected and makees with one end of the power sense cell
It is the negative pole end of class full-bridge energy storage submodule；The other end of the power sense cell is connected with the anode of the battery；Described 3rd
Gate-controlled switch device, the 4th gate-controlled switch device, the 5th gate-controlled switch device, the 6th gate-controlled switch device
Grid is connected with control circuit.
Preferably, the DC component of the half-bridge submodule and modulation ratio in the class full-bridge energy storage submodule with exchange point
There is constraint in amount peak value, and make the modulation ratio of current transformer steady operation not unique.
Compared with prior art, the present invention has following beneficial effect：
Modular multi-level converter simple structure of the present invention with energy-storage function, by class full-bridge energy storage submodule
Design, is that new energy resources system increases inertia, and battery charging and discharging electric current used by energy storage is smoothed, and voltage class is relatively low, ensures
The Effec-tive Function and security of battery.Using the method for phase-shifting carrier wave pulsewidth modulation, equivalent switching frequency can be improved, reduced
Harmonic wave is distributed.
Brief description of the drawings
The detailed description made to non-limiting example with reference to the following drawings by reading, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the converter topology figure of one embodiment of the present invention；
Fig. 2 is the half-bridge submodular circuits figure of one embodiment of the present invention；
Fig. 3 is the class full-bridge energy storage submodular circuits figure of one embodiment of the present invention；
A, b, c, d are respectively the half-bridge submodule of one embodiment of the present invention, the tune of class full-bridge energy storage submodule in Fig. 4
Ripple processed and total equivalent output voltage schematic diagram；
A, b, c are respectively the lower bridge arm current of one embodiment of the present invention, the equivalent output voltage of half-bridge submodule in Fig. 5
With half-bridge submodule power pulsations situation schematic diagram；
To be respectively the lower bridge arm current of one embodiment of the present invention, class full-bridge energy storage submodule equivalent defeated for a, b, c in Fig. 6
Go out voltage and class full-bridge energy storage submodule power pulsations situation schematic diagram；
Fig. 7 is the class full-bridge energy storage submodule cell voltage closed control circuit figure of one embodiment of the present invention；
Fig. 8 is the current transformer half-bridge and class full-bridge energy storage submodule modulation wave generator circuit of one embodiment of the present invention
Figure.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
As shown in figure 1, a kind of modular multi-level converter topology with energy-storage function, including three facies units；Often
Individual facies unit x (x=a, b, c) includes upper bridge arm, lower bridge arm, upper bridge arm inductance Lxp, lower bridge arm inductance Lxn；Wherein：
The positive terminal of the upper bridge arm as facies unit direct current outlet positive terminal；The negative pole end of the upper bridge arm with it is described
Upper bridge arm inductance LxpOne end be connected；The upper bridge arm inductance LxpThe other end and the lower bridge arm inductance LxnOne end be connected,
Used as the exchange leading-out terminal of facies unit, its voltage is Vx, and current-limiting reactor LTxPower network is connected to, its voltage is Vsx；Under described
Bridge arm inductance LxnThe other end be connected with the positive terminal of the lower bridge arm；The negative pole end of the lower bridge arm as facies unit direct current
Outlet negative pole end；
Upper bridge arm, lower bridge arm in three facies units is by half-bridge submodule and class full-bridge energy storage submodule mixing string
Connection is formed.Submodule xyi (x=a, b, c, y=p, n, i=1,2 ... N；Wherein in p representatives, under n is represented) represent x phase y bridge arms
I-th submodule, ixRefer to x cross streams side electric current, ixyRefer to the electric current of x phase y bridge arms, VxyRefer to all submodule outputs of x phase y bridge arms
Voltage and, IdRefer to DC side electric current, VdcRefer to DC voltage.
As shown in Fig. 2 being the half-bridge submodular circuits figure of a preferred embodiment；Described half-bridge submodule, including：First
Direct current capacitors C1, the first gate-controlled switch device S1, the second gate-controlled switch device S2, and the first sustained diode 1, second
Sustained diode 2；Wherein：
The colelctor electrode of the first gate-controlled switch device S1, the second gate-controlled switch device S2 colelctor electrode respectively with institute
The negative electrode of the first sustained diode 1, the negative electrode of second sustained diode 2 is stated to be connected；The first gate-controlled switch device
Emitter stage anode, the institute respectively with first sustained diode 1 of the emitter stage of S1, the second gate-controlled switch device S2
The anode for stating the second sustained diode 2 is connected；The colelctor electrode of the first gate-controlled switch device S1 also with first direct current
The anode of container C1 is connected；The emitter stage of the second gate-controlled switch device S1 also with the negative electrode of the first direct current capacitors C1
It is connected；The grid of the first gate-controlled switch device S1, the grid of the second gate-controlled switch device S2 are connected with control circuit.
As shown in figure 3, being the class full-bridge energy storage submodular circuits figure of a preferred embodiment；Described class full-bridge energy storage submodule
Block, including：Second direct current capacitors C2, battery, power sense cell L, the 3rd gate-controlled switch device S3, the 4th gate-controlled switch device
S4, the 5th gate-controlled switch device S5, the 6th gate-controlled switch device S6, and the 3rd sustained diode 3, the 4th fly-wheel diode
D4, the 5th sustained diode 5, the 6th sustained diode 6；Wherein：
The colelctor electrode of the 3rd gate-controlled switch device S3, the colelctor electrode of the 4th gate-controlled switch device S4, described
The colelctor electrode of five gate-controlled switch device S5, the 6th gate-controlled switch device S6 colelctor electrode respectively with the pole of the 3rd afterflow two
The negative electrode of pipe D3, the negative electrode of the 4th sustained diode 4, the negative electrode of the 5th sustained diode 5, the 6th afterflow
The negative electrode of diode D6 is connected；The emitter stage of the 3rd gate-controlled switch device S3, the hair of the 4th gate-controlled switch device S4
Emitter-base bandgap grading, the emitter stage of the 5th gate-controlled switch device S5, the 6th gate-controlled switch device S6 emitter stage respectively with it is described
The anode of the 3rd sustained diode 3, the anode of the 4th sustained diode 4, the anode of the 5th sustained diode 5,
The anode of the 6th sustained diode 6 is connected；The colelctor electrode of the 3rd gate-controlled switch device S3 also with second direct current
The anode of capacitor C2 is connected；The emitter stage of the 4th gate-controlled switch device S4 also with the moon of the second direct current capacitors C2
Pole, the negative electrode of the battery are connected；The emitter stage of the 3rd gate-controlled switch device S3 is also as the class full-bridge energy storage submodule
The positive terminal of block；The emitter stage of the 5th gate-controlled switch device S5 is also connected and as institute with one end of the power sense cell L
State the negative pole end of class full-bridge energy storage submodule；The other end of the power sense cell L is connected with the anode of the battery；Described 3rd
The grid of gate-controlled switch device S3, the grid of the 4th gate-controlled switch device S4, the grid of the 5th gate-controlled switch device S5
Pole, the grid of the 6th gate-controlled switch device S6 are connected with control circuit.
As shown in a, b, c, d in Fig. 4, the lower bridge arm half-bridge submodule of a respectively preferred embodiment, class full-bridge energy storage
The modulating wave of module and total equivalent output voltage schematic diagram；Note modulating wave is that sinusoidal bridge arm is MMC bridge arms (in such as Fig. 4 (c)
It is shown), modulating wave is energy storage bridge arm for the bridge arm of direct current (in such as Fig. 4 shown in (d))；Wherein：mdc-HB、mac-HBRespectively half-bridge
The DC component of pipe modulation ratio and AC compounent peak value, m on submoduledc-FB、mac-FBRespectively class full-bridge energy storage submodule MMC
The DC component of pipe modulation ratio and AC compounent peak value, m on bridge armbIt is the modulation ratio of class full-bridge energy storage submodule energy storage bridge arm；
AC compounent with biasing is exported by half-bridge submodule and class full-bridge energy storage submodule jointly, DC voltage can be supported(phase voltage peak value is V with alternating voltages)。
As shown in a, b, c in Fig. 5, bridge arm current, the equivalent output voltage of half-bridge submodule and half-bridge submodule are respectively descended
Power pulsations situation schematic diagram；DC component is in lower bridge arm currentAC compounent peak value isVcIt is capacitance voltage
Direct current average；By figure observe it can be found that choose suitable modulation ratio can allow half-bridge submodule power swing at one
Power frequency period inner equilibrium, so that half-bridge submodule steady operation.
As shown in a, b, c in Fig. 6, respectively descend bridge arm current, the class equivalent output voltage of full-bridge energy storage submodule and class complete
Bridge energy storage submodule power pulsations situation schematic diagram；DC component is in lower bridge arm currentAC compounent peak value isVc
It is the direct current average of capacitance voltage；Observed by figure it can be found that choosing suitable modulation ratio can allow class full-bridge energy storage submodule
Average value of the power swing of block in a power frequency period is equal to the power of battery storage or release, so that the energy storage of class full-bridge is sub
Module stability works.
A kind of control method of the modular multi-level converter topology with energy-storage function, the control method is using load
Ripple shifts to SPWM modulation.
Hereinafter only illustrated by taking the upper bridge arm in A phases as an example；Three facies units, B, C phase only exists one with the modulation of A phases
Individual phase angle difference, submodule (including half-bridge submodule and class full-bridge energy storage submodule) the AC modulation ratio in lower bridge arm is upper bridge arm
In similar submodule AC modulation than opposite number.
In rectification, inversion operating mode：
In half-bridge submodule, the complementary conductings of the first gate-controlled switch device S1 and the second gate-controlled switch device S2, note first can
Controlling switching device S1 modulating waves is：
D1=mdc-HB+mac-HBcos(wt)
In class full-bridge energy storage submodule：3rd gate-controlled switch device S3 and the 4th gate-controlled switch device S4, the 5th controllable open
The complementary conductings of device S5 and the 6th gate-controlled switch device S6 are closed, the 3rd gate-controlled switch device S3 modulating waves of note are：
D3=mdc-FB+mac-FBcos(wt)
Remember that the 5th gate-controlled switch device S5 modulating waves are：
D5=mb；
During the modulating wave of gained feeding carrier wave shifted into PWM generator, the SPWM ripples of final output are obtained.
If in upper bridge arm：The number of half-bridge submodule is N1, the number of class full-bridge energy storage submodule is N2, DC voltage
Vd, DC side electric current Id, exchange leading-out terminal phase voltage peak value Vs, AC phase current peak Is, power-factor angleElectricity
Pond electric current Ib, cell voltage Vb, half-bridge submodule capacitor voltage VC-HB, class full-bridge energy storage submodule capacitor voltage VC-FB, mdc-HB、
mac-HBThe respectively DC component of half-bridge submodule modulation ratio and AC compounent peak value, mdc-FB、mac-FBRespectively class full-bridge energy storage
The DC component and AC compounent peak value of submodule MMC bridge arm modulation ratios, mbIt is the tune of class full-bridge energy storage submodule energy storage bridge arm
System ratio.
Row write one power frequency period equilibrium equation of Kirchoff s voltage equation and submodule capacitor voltage：
And linear modulation constraints：
mdc-HB≥mac-HB＞ 0
mdc-FB≥mac-FB＞ 0
0≤mdc-HB+mac-HB≤1
0≤mdc-FB+mac-FB≤1
Solve the variable among above-mentioned gate-controlled switch device modulation ripple and meet following relation：
As shown in fig. 7, being the class full-bridge energy storage submodule battery current closed-loop control of a preferred embodiment：First, battery
Current target valueWith battery actual current average value IbDiffer from, modulation ratio deviation signal Δ m is obtained by PI closed loopsb, with reason
Think energy storage bridge arm modulation ratioSued for peace, to obtain the modulation ratio signal m that should actually exportb；When battery current average value
During more than desired value, PI output modulation ratio deviation signals are negative, the modulation ratio signal m of reality outputbLess than ideal Modulated ratio
So the charging interval of battery can be reduced so that battery current average value declines, so that this control is feasible；In battery electricity
Levelling average has same analysis when being less than desired value.
As shown in figure 8, being the current transformer half-bridge and class full-bridge energy storage submodule modulation wave generator of a preferred embodiment：It is first
First, the value according to current three-phase current carries out dq conversion, to obtain current dq shaft currents id、iq；Control is decoupled by classical dq
System, to obtain the dq shaft voltages V of the exchange leading-out terminal that should currently exportd、Vq；Being obtained through inverse dq conversion again should currently export
Exchange leading-out terminal phase voltage peak value Vs；According to VsWith the numerical value measured in other actual conditions, the public affairs for calculating modulation ratio are substituted into
Formula (1)-(5), you can obtain the modulation ratio that half-bridge submodule should be exported with class full-bridge energy storage submodule, it is suitable so as to send
Modulating wave, and and correspondingly the triangular carrier (being sent by control panel) of submodule produces control signal after being compared.
Specific embodiment of the invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can within the scope of the claims make various deformations or amendments, this not shadow
Sound substance of the invention.
Claims (4)
1. a kind of control method of the modular multi-level converter with energy-storage function, it is characterised in that：
The current transformer includes three facies units, and each facies unit includes upper bridge arm, lower bridge arm, upper bridge arm inductance, lower bridge arm
Inductance；The positive terminal of the upper bridge arm as facies unit direct current outlet positive terminal；The negative pole end of the upper bridge arm with it is described on
One end of bridge arm inductance is connected；The other end of the upper bridge arm inductance is connected with one end of the lower bridge arm inductance, used as mutually single
The exchange leading-out terminal of unit, and current-limiting reactor is connected to power network；The other end of the lower bridge arm inductance is with the lower bridge arm just
It is extreme to be connected；The negative pole end of the lower bridge arm as facies unit direct current outlet negative pole end；Described upper bridge in three facies units
Arm, the lower bridge arm are in series by half-bridge submodule and the mixing of class full-bridge energy storage submodule；
Include multiple gate-controlled switch devices, all gate-controlled switch devices in the half-bridge submodule and class full-bridge energy storage submodule
Using unipolarity phase-shifting carrier wave sinusoidal pulse width modulation method, with the conservation of energy, one power frequency period stabilization of submodule capacitor voltage
Premised on linear modulation, the modulation ratio for obtaining half-bridge submodule and class full-bridge energy storage submodule is calculated；According to every mutually to be output
Command voltage waveform, it is determined that per phase upper bridge arm, lower bridge arm in each half-bridge submodule and class full-bridge energy storage submodule modulation
Ripple, the carrier wave and half-bridge submodule of each half-bridge submodule and class full-bridge energy storage submodule in the upper bridge arm, lower bridge arm according to every phase
Block is compared generation control signal with the modulating wave of class full-bridge energy storage submodule, and upper bridge arm, lower bridge arm per phase are controlled respectively
In each half-bridge submodule and class full-bridge energy storage submodule input or cut-out.
2. the control method of the modular multi-level converter with energy-storage function according to claim 1, its feature exists
In：Described half-bridge submodule, including：First direct current capacitors, the first gate-controlled switch device, the second gate-controlled switch device,
One fly-wheel diode, the second fly-wheel diode；Wherein：
The first gate-controlled switch device, the second gate-controlled switch device colelctor electrode respectively with the pole of the first afterflow two
Pipe, the negative electrode of second fly-wheel diode are connected；The first gate-controlled switch device, the hair of the second gate-controlled switch device
Anode of the emitter-base bandgap grading respectively with first fly-wheel diode, second fly-wheel diode is connected；The first gate-controlled switch device
The colelctor electrode of part is connected with the anode of first direct current capacitors；The emitter stage of the second gate-controlled switch device and described
The negative electrode of one direct current capacitors is connected；First controllable devices, the grid of the second controllable devices is connected with control circuit.
3. the control method of the modular multi-level converter with energy-storage function according to claim 1, its feature exists
In：Described class full-bridge energy storage submodule, including：Second direct current capacitors, battery, power sense cell, the 3rd gate-controlled switch device,
4th gate-controlled switch device, the 5th gate-controlled switch device, the 6th gate-controlled switch device, and the 3rd fly-wheel diode, the 4th continue
Stream diode, the 5th fly-wheel diode, the 6th fly-wheel diode；Wherein：
The 3rd gate-controlled switch device, the 4th gate-controlled switch device, the 5th gate-controlled switch device, the described 6th can
Control switching device colelctor electrode respectively with the 3rd fly-wheel diode, the 4th fly-wheel diode, the 5th afterflow two
Pole pipe, the negative electrode of the 6th fly-wheel diode are connected；The 3rd gate-controlled switch device, the 4th gate-controlled switch device,
The 5th gate-controlled switch device, the 6th gate-controlled switch device emitter stage respectively with the 3rd fly-wheel diode, institute
The 4th fly-wheel diode, the 5th fly-wheel diode, the anode of the 6th fly-wheel diode is stated to be connected；Described 3rd is controllable
The colelctor electrode of switching device is connected with the anode of second direct current capacitors；The emitter stage of the 4th gate-controlled switch device with
Second direct current capacitors, the negative electrode of the battery are connected；The emitter stage of the 3rd gate-controlled switch device is used as class full-bridge
The positive terminal of energy storage submodule；The emitter stage of the 5th gate-controlled switch device is connected and conduct with one end of the power sense cell
The negative pole end of class full-bridge energy storage submodule；The other end of the power sense cell is connected with the anode of the battery；Described 3rd can
Control switching device, the 4th gate-controlled switch device, the 5th gate-controlled switch device, the grid of the 6th gate-controlled switch device
Extremely it is connected with control circuit.
4. the control method of the modular multi-level converter with energy-storage function according to claim any one of 1-3,
It is characterized in that：The DC component of the half-bridge submodule and modulation ratio in the class full-bridge energy storage submodule and AC compounent peak
There is constraint in value, and make the modulation ratio of current transformer steady operation not unique.
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| CN108768193A (en) * | 2018-05-03 | 2018-11-06 | 浙江大学 | A kind of modular multilevel circuit based on power decoupled |
| CN110854947A (en) * | 2019-10-31 | 2020-02-28 | 上海交通大学 | Hybrid energy storage type modularized multi-level converter battery state of charge balancing method |
| CN111934572A (en) * | 2020-06-29 | 2020-11-13 | 中国电力科学研究院有限公司 | Super-large-scale energy storage MMC converter device and energy storage control method |
| CN112776659A (en) * | 2019-11-05 | 2021-05-11 | 中车株洲电力机车研究所有限公司 | Electric automobile driving system integrating power battery, speed regulation, charging and EMS |
| CN113474986A (en) * | 2019-02-27 | 2021-10-01 | Abb电网瑞士股份公司 | Buck-boost converter unit for MMC |
| CN114793052A (en) * | 2022-06-22 | 2022-07-26 | 国网山东省电力公司东营供电公司 | Current conversion method of modular multilevel converter working in quasi two-level mode |
| CN113726163B (en) * | 2021-08-19 | 2023-10-27 | 中国长江三峡集团有限公司 | Parallel network type transformer based on step-down type public direct-current voltage bus |
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| CN108768193A (en) * | 2018-05-03 | 2018-11-06 | 浙江大学 | A kind of modular multilevel circuit based on power decoupled |
| CN113474986A (en) * | 2019-02-27 | 2021-10-01 | Abb电网瑞士股份公司 | Buck-boost converter unit for MMC |
| CN113474986B (en) * | 2019-02-27 | 2022-06-03 | 日立能源瑞士股份公司 | Converter unit for MMC, MMC and control method thereof |
| CN110854947A (en) * | 2019-10-31 | 2020-02-28 | 上海交通大学 | Hybrid energy storage type modularized multi-level converter battery state of charge balancing method |
| CN110854947B (en) * | 2019-10-31 | 2021-06-29 | 上海交通大学 | Hybrid energy storage type modularized multi-level converter battery state of charge balancing method |
| CN112776659A (en) * | 2019-11-05 | 2021-05-11 | 中车株洲电力机车研究所有限公司 | Electric automobile driving system integrating power battery, speed regulation, charging and EMS |
| CN111934572A (en) * | 2020-06-29 | 2020-11-13 | 中国电力科学研究院有限公司 | Super-large-scale energy storage MMC converter device and energy storage control method |
| CN111934572B (en) * | 2020-06-29 | 2022-10-04 | 中国电力科学研究院有限公司 | Super-large-scale energy storage MMC converter device and energy storage control method |
| CN113726163B (en) * | 2021-08-19 | 2023-10-27 | 中国长江三峡集团有限公司 | Parallel network type transformer based on step-down type public direct-current voltage bus |
| CN114793052A (en) * | 2022-06-22 | 2022-07-26 | 国网山东省电力公司东营供电公司 | Current conversion method of modular multilevel converter working in quasi two-level mode |
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