CN105391303A - Rectangular wave modulation method for modular isolation type battery energy storage converter - Google Patents
Rectangular wave modulation method for modular isolation type battery energy storage converter Download PDFInfo
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- CN105391303A CN105391303A CN201510786660.1A CN201510786660A CN105391303A CN 105391303 A CN105391303 A CN 105391303A CN 201510786660 A CN201510786660 A CN 201510786660A CN 105391303 A CN105391303 A CN 105391303A
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- 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
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a rectangular wave modulation method for a modular isolation type battery energy storage converter. According to the invention, the duty ratio of the alternating voltage at the primary and secondary sides of a transformer in a half switching cycle is less than 0.5, the direction and size of energy transfer between an energy storage battery and a direct-current power grid are controlled by adjusting the phase difference between the primary rectangular wave voltage and the secondary rectangular wave voltage, the direct-current bus capacitor voltage of each sub module of the bridge arm at the secondary side of the transformer is stabilized by correcting the phase difference, and the average of current at the secondary side of the transformer, namely, the direct-current distribution network current is adjusted by adjusting the direct-current component of the output voltage of all the sub modules of the bridge arm at the secondary side of the transformer. Therefore, the purpose of module voltage stabilizing and grid-connected current controlling is achieved, and stable and reliable operation of the system is realized.
Description
Technical field
The present invention relates to technical field of electric automation equipment, particularly, relate to a kind of square wave modulation strategy of modularization isolated form battery energy storage converter.
Background technology
The various aspects of battery energy storage system in electric power system, especially in load balancing, the user side quality of power supply, reactive power compensation and hold the key areas such as regenerative resource in occupation of the position become more and more important.And due to the cost of its special role and costliness, the reliability of battery energy storage system is held the balance.
Module multi-level converter (MMC) due to output voltage higher grade, and extensibility and Redundant Control capacity are large, are widely used in DC distribution net.By isolated form modular multilevel energy storage converter applications in DC distribution net, transformer primary avris connects energy storage cascade H-bridge circuit by a filter inductance, transformer secondary side winding connects DC distribution net by filter inductance and secondary brachium pontis, transformer secondary brachium pontis is formed by n sub-block coupled in series, the direct current side joint dc-link capacitance of each module.
But, owing to being applied to the particularity of the isolated form modular multilevel energy storage transformer configuration of mesohigh DC distribution net, need corresponding modulation and control strategy to ensure the reliable and stable operation of system.
Summary of the invention
For the defect of prior art, the object of the invention is for the isolated form modular multilevel energy storage converter based on direct current network provides a kind of square wave modulator approach, namely transformer primary secondary alternating voltage duty ratio in half switch periods is less than 0.5, and by regulating the phase difference of transformer primary secondary high frequency rectangular wave voltage, realize the bi-directional of energy between energy-storage battery and direct current network, in addition, by corresponding control strategy, system stability reliability service is realized.
The invention provides a kind of square wave modulator approach of isolated form modular multilevel energy storage converter, described modularization isolated form battery energy storage converter topology structure is: transformer primary side is by a filter inductance L
pconnect the output of former limit brachium pontis Arm_p1, transformer primary side brachium pontis Arm_p1 is formed by the cascade of m H bridge, the output of the series connection of m H bridge as the output of former limit brachium pontis Arm_p1, the direct current side joint energy-storage battery of each H bridge; One end, secondary side of transformer is by a filter inductance L
s, brachium pontis Arm_s1 is connected with direct current network bus negative pole, the secondary side other end of transformer is connected with the positive pole of direct current network bus; Brachium pontis Arm_s1 is made up of n sub-block coupled in series, each submodule direct current side joint dc-link capacitance, and each module forming secondary brachium pontis Arm_s1 adopts full bridge structure or half-bridge structure;
Described transformer primary side alternating voltage positive-negative half-cycle square wave duty ratio is less than 0.5, namely each H bridge of former limit brachium pontis Arm_p1 output voltage duty ratio in half switch periods is less than 0.5, phase difference is not had between each H bridge, each H bridge of former limit brachium pontis Arm_p1 can export three kinds of states (-1,0,1), and the scope of transformer primary side square-wave voltage is-m ~ m;
Because direct current network exists, after all submodule output AC voltage superpositions of secondary brachium pontis Arm_s1, DC component is approximately direct current network voltage vdc, namely transformer secondary side alternating voltage is symmetrical about vdc, and transformer secondary side alternating voltage is about the positive-negative half-cycle square wave duty ratio D of vdc symmetry
pbe less than 0.5, i.e. each submodule of secondary brachium pontis Arm_s1 output voltage duty ratio D in half switch periods
sbe less than 0.5, there is no phase difference between each submodule, D
pwith D
sequal or unequal; When each submodule of secondary brachium pontis Arm_s1 adopts full bridge structure, it is-n ~ n that secondary brachium pontis Arm_s1 exports square-wave voltage scope; Each half-bridge can only export two states (0,1), and when each module of secondary brachium pontis Arm_s1 adopts half-bridge structure, it is 0 ~ n that secondary brachium pontis Arm_s1 exports square-wave voltage scope;
For realizing the Two-way energy transfer between energy-storage battery and direct current network, between transformer primary secondary square wave, there is phase difference
the present invention makes transformer primary secondary alternating voltage duty ratio in half switch periods be less than 0.5, energy transferring direction and size between energy-storage battery and direct current network is controlled by regulating the phase difference between former limit square-wave voltage and secondary square-wave voltage, poor by phase calibration, each submodule dc-link capacitance voltage of stabilizing transformer secondary side brachium pontis, transformer secondary side current average is regulated by regulating transformer secondary side brachium pontis all submodule output voltages DC component, i.e. DC distribution current on line side, thus reach the object of stable module voltage and control grid-connected current, realize system stability reliability service.
Preferably, described method, by controlling all submodule DC bus-bar voltage of secondary brachium pontis Arm_s1, regulates the phase difference of transformer primary secondary square wave
namely the rated value of Arm_s1 module DC bus-bar voltage and the deviation of Arm_s1 all module DC bus-bar voltage average are as the input of pi regulator, and the output of pi regulator is as phase difference
Preferably, described transformer secondary side current average is regulated by the DC component correcting all submodule output voltages of secondary brachium pontis Arm_s1, i.e. transformer secondary side current i
lsthe input as pi regulator is added with the set-point of direct current network electric current, the output of pi regulator and direct current network busbar voltage v after low pass filter LF filtering
dcdeviation is as secondary brachium pontis Arm_s1 direct voltage modulation signal v
s1_dc.
Compared with prior art, the present invention has following beneficial effect:
The square wave modulation strategy of isolated form modular multilevel energy storage variator of the present invention, the energy exchange between energy-storage battery and direct current network can be realized, and realizing the balanced and Circuit Fault on Secondary Transformer Current adjustment of module voltage by certain control strategy, this modulation and control strategy are applicable to the square wave that converter topology can be equivalent to all isolated form modular multilevel energy storage converters based on DC distribution net of the averaging model of Fig. 3 and modulate.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the topological structure of the converter of one embodiment of the invention;
Fig. 2 is the square wave modulation principle figure of one embodiment of the invention;
Fig. 3 is the average equivalent circuit diagram of the isolated form modular multilevel energy storage converter based on direct current network of one embodiment of the invention;
Fig. 4 is the control chart of the brachium pontis Arm_s1 modules dc-link capacitance electric voltage equalization of one embodiment of the invention;
Fig. 5 is the brachium pontis Arm_s1 output voltage DC component modulation signal generating principle figure of one embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, this all belongs to protection scope of the present invention.
As shown in Figure 1, the circuit topology of modularization isolated form battery energy storage converter in one embodiment of the invention, wherein: transformer primary side brachium pontis Arm_p1 is composed in series by m H bridge, the direct current side joint energy-storage battery of each H bridge, transformer primary side brachium pontis Arm_p1 is by a filter inductance L
pconnect transformer primary side;
Each H bridge of isolating transformer former limit brachium pontis Arm_p1 is designated as cell
p1_i(1≤i≤m), cell
p1_idirect current side joint energy-storage battery, cell
p1_idC side cell voltage is designated as v
p1_i_dc(1≤i≤m), cell
p1_iexchange end output and be designated as v
p1_i_ac(1≤i≤m), i
p1_i_dc(1≤i≤m) is cell
p1_idC side electric current, i
p1_i_ac(1≤i≤m) is cell
p1_ioutlet side electric current.Former limit filter inductance is L
p, primary current is i
lp, transformer voltage ratio is 1:N.
One end, secondary side of transformer is by a filter inductance L
s, secondary brachium pontis Arm_s1 is connected with direct current network bus negative pole, the secondary side other end of transformer is connected with the positive pole of direct current network bus; Transformer secondary brachium pontis Arm_s1 is by n sub-block coupled in series, and each submodule topology both can be half-bridge structure also can be full bridge structure, and each submodule is designated as cell
s1_j(1≤j≤n), cell
s1_jdirect current side joint electric capacity, capacitance voltage is designated as v
s1_j_dc(1≤j≤n), cell
s1_jexchange end output and be designated as v
s1_j_ac(1≤j≤n), i
s1_j_dc(1≤j≤n) is cell
s1_jdC side electric current, i
s1_j_ac(1≤j≤n) is cell
s1_joutlet side electric current.Secondary filter inductance is L
s, secondary current is i
ls.Direct current network busbar voltage is v
dc, electric current is i
dc.
Owing to adopting modularized design, even if the electric pressure of each module is lower, still can reaches higher electric pressure, thus realize low-loss, low cost, high switching frequency.
Based on said structure, described transformer primary side alternating voltage positive-negative half-cycle square wave duty ratio D
pbe less than 0.5, i.e. each module of former limit Arm_p1 output voltage duty ratio D in half switch periods
pbe less than 0.5, do not have phase difference between modules, because each energy-storage module of Arm_p1 adopts H bridge construction, each H bridge can export three kinds of states (-1,0,1), so the scope of transformer primary side square-wave voltage is-m ~ m.Because direct current network exists, after all module output AC voltage superpositions of secondary brachium pontis Arm_s1, DC component is approximately direct current network voltage v
dc, namely transformer secondary side alternating voltage is about v
dcsymmetry, and transformer secondary side alternating voltage is about v
dcsymmetrical positive-negative half-cycle square wave duty ratio D
sbe less than 0.5, i.e. each module of former limit Arm_s1 output voltage duty ratio D in half switch periods
sbe less than 0.5, between modules, there is no phase difference, D
pwith D
sboth can equal also can be unequal.Each submodule of Arm_s1 both can adopt half-bridge structure also can adopt full bridge structure, when each module of Arm_s1 adopts full bridge structure, it is-n ~ n that Arm_s1 exports square-wave voltage scope, because each half-bridge is only to export two states (0,1), so when each module of Arm_s1 adopts half-bridge structure, it is 0 ~ n that Arm_s1 exports square-wave voltage scope.
Shown in Fig. 2, in one embodiment of the invention based on the square wave modulation principle of the isolated form modular multilevel energy storage converter of direct current network: all H bridge of former limit brachium pontis Arm_p1 does not have phase difference between exporting, and stack result is the rectangle wave-wave v of Symmetrical
p1, remember that half switch periods is T
s, at (0 ~ D
pt
s) in the time, v
p1for just, at (D
pt
s~ T
s) in the time, v
p1be 0, at (T
s~ (1+D
p) T
s)) in the time, v
p1be negative, at ((1+D
p) T
s~ 2T
s) in the time, v
p1be 0.Note phase difference
the ratio of relative π is
then exist
in time, v
s1export 0,
in time, v
s1output is greater than v
dc,
in time, v
s1export 0,
in time, v
s1output is less than v
dc,
in time, v
s1export 0.Former avris alternating current i
lpfor the cyclic variation curve of Symmetrical, i.e. i
lpdC component is 0, secondary top-cross stream current i
lscomprise DC component (i
ls (avs)) symmetrical, i
ls (avs)be direct current network current i
dc, i.e. i
lsfor about i
dcsymmetrical cyclic variation curve.
Shown in Fig. 3, it is the average equivalent circuit diagram of modularization isolated form battery energy storage converter in one embodiment of the invention.The averaging model of converter can be equivalent to: former limit AC is equivalent to transformer primary side winding, filter inductance L
pwith a controlled voltage source v
p1(Arm_p1 output equivalent is v
p1) series loop, DC energy storage side is equivalent to energy-storage battery v
arm_p1_dcconnect a controlled current source d
p1i
lp; Secondary AC is equivalent to vice-side winding, filter inductance L
s, controlled voltage source v
s1(Arm_s1 output equivalent is v
s1), direct current network v
dcseries loop, module DC side is equivalent to v
arm_s1_dcconnect a controlled current source d
s1i
ls, all module DC side equivalent capacitys of Arm_s1 are Cs/n, and this capacitor equivalent voltage is v
arm_s1_dc, i
lsfor secondary transformer side electric current, i
dcfor direct current current on line side.
V
arm_p1_dcfor former limit brachium pontis Arm_p1 all H bridge batteries voltage sum, d
p1for the equivalent duty ratio sum of former limit brachium pontis Arm_p1 all H bridge, v
p1for former limit brachium pontis Arm_p1 output voltage, both comprised DC component and also comprised alternating current component.V
arm_s1_dcfor secondary brachium pontis Arm_s1 all submodule DC capacitor voltages sum, d
s1for the equivalent duty ratio sum of all submodules of secondary brachium pontis Arm_s1, v
s1for secondary brachium pontis Arm_s1 output voltage, both comprised DC component and also comprised alternating current component.V
dcfor direct current network voltage.
According to the averaging model of above-mentioned converter, the phase difference of transformer primary secondary square wave can be regulated by all submodule DC bus-bar voltage of control Arm_s1
namely the rated value of Arm_s1 all modules DC bus-bar voltage and the deviation of Arm_s1 all module DC bus-bar voltage average are as the input of pi regulator, and the output of pi regulator is as phase difference
Shown in Fig. 4, be the control chart of the brachium pontis Arm_s1 modules dc-link capacitance electric voltage equalization of one embodiment of the invention, V
arms1_dc* secondary brachium pontis Arm_s1 each submodule DC capacitor voltage rated value is represented, v
arms1_dcrepresent secondary brachium pontis Arm_s1 all submodule DC capacitor voltages mean value, V
arms1_dc* with v
arms1_dcdeviation through pi regulator correct after as phase difference
namely by phase calibration difference, each submodule DC capacitor voltage of secondary brachium pontis Arm_s1 is stabilized near rated value.
Shown in Fig. 5, for one embodiment of the invention kind is based on the Arm_s1 output voltage DC component modulation signal v of the isolated form modular multilevel energy storage converter of direct current network
s1_dcgenerating principle figure: secondary current i
lsby low pass filter LF and direct current network current rating i
dc* the input as pi regulator is added, the output of pi regulator and direct current network voltage v
dcdeviation as v
s1_dcmodulation signal.Namely by correcting secondary brachium pontis Arm_s1 output voltage DC component control i
ls.
In sum, present embodiments provide a kind of isolated form modular multilevel energy storage converter square wave modulation strategy, the method requires that transformer primary secondary voltage duty ratio in half switch periods is less than 0.5, and there is the energy exchange that phase difference realizes between energy-storage battery and direct current network between former secondary square wave, poor by phase calibration, each submodule dc-link capacitance voltage of stabilizing transformer secondary side brachium pontis, transformer secondary side current average is regulated by regulating transformer secondary side brachium pontis all submodule output voltages DC component, thus realize system stability reliability service.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (4)
1. the square wave modulator approach of a modularization isolated form battery energy storage converter, it is characterized in that, described modularization isolated form battery energy storage converter topology structure is: transformer primary side brachium pontis Arm_p1 is composed in series by m H bridge, the direct current side joint energy-storage battery of each H bridge, transformer primary side brachium pontis Arm_p1 is by a filter inductance L
pconnect transformer primary side; One end, secondary side of transformer is by a filter inductance L
s, secondary brachium pontis Arm_s1 is connected with direct current network bus negative pole, the secondary side other end of transformer is connected with the positive pole of direct current network bus; Secondary brachium pontis Arm_s1 is made up of n sub-block coupled in series, each submodule direct current side joint dc-link capacitance, and each module forming secondary brachium pontis Arm_s1 is full bridge structure or half-bridge structure;
Described transformer primary side alternating voltage positive-negative half-cycle square wave duty ratio D
pbe less than 0.5, i.e. each H bridge of former limit brachium pontis Arm_p1 output voltage duty ratio D in half switch periods
pequal and be all less than 0.5, namely do not have phase difference between each H bridge, each H bridge of former limit brachium pontis Arm_p1 can export three kinds of states (-1,0,1), and the scope of transformer primary side square-wave voltage is-m ~ m;
Because direct current network exists, after all submodule output AC voltage superpositions of secondary brachium pontis Arm_s1, DC component is approximately direct current network voltage v
dc, namely transformer secondary side alternating voltage is about v
dcsymmetry, and transformer secondary side alternating voltage is about v
dcsymmetrical positive-negative half-cycle square wave duty ratio D
sbe less than 0.5, i.e. each submodule of secondary brachium pontis Arm_s1 output voltage duty ratio D in half switch periods
sbe less than 0.5, there is no phase difference between each submodule, D
pwith D
sequal or unequal; When each submodule of secondary brachium pontis Arm_s1 adopts full bridge structure, it is-n ~ n that secondary brachium pontis Arm_s1 exports square-wave voltage scope; Each half-bridge can only export two states (0,1), and when each module of secondary brachium pontis Arm_s1 adopts half-bridge structure, it is 0 ~ n that secondary brachium pontis Arm_s1 exports square-wave voltage scope;
For realizing the Two-way energy transfer between energy-storage battery and direct current network, between transformer primary secondary square wave, there is phase difference
described method makes transformer primary secondary alternating voltage duty ratio in half switch periods be less than 0.5, by regulating the phase difference between former limit square-wave voltage and secondary square-wave voltage
control energy transferring direction and size between energy-storage battery and direct current network, poor by phase calibration, each submodule dc-link capacitance voltage of stabilizing transformer secondary side brachium pontis, transformer secondary side current average is regulated by regulating transformer secondary side brachium pontis all submodule output voltages DC component, i.e. DC distribution current on line side, thus reach the object of stable module voltage and control grid-connected current, realize system stability reliability service.
2. the square wave modulator approach of modularization isolated form battery energy storage converter according to claim 1, is characterized in that, described method, by controlling all submodule DC bus-bar voltage of secondary brachium pontis Arm_s1, regulates the phase difference of transformer primary secondary square wave
namely the rated value of secondary brachium pontis Arm_s1 all submodules DC bus-bar voltage and the deviation of secondary brachium pontis Arm_s1 all submodule DC bus-bar voltage average are as the input of pi regulator, and the output of pi regulator is as phase difference
3. the square wave modulator approach of modularization isolated form battery energy storage converter according to claim 1, it is characterized in that, described transformer secondary side current average is regulated by the DC component correcting all submodule output voltages of secondary brachium pontis Arm_s1, i.e. transformer secondary side current i
lsthe input as pi regulator is added with the set-point of direct current network electric current, the output of pi regulator and direct current network busbar voltage v after low pass filter LF filtering
dcdeviation is as secondary brachium pontis Arm_s1 direct voltage modulation signal v
s1_dc.
4. the square wave modulator approach of the modularization isolated form battery energy storage converter according to any one of claim 1-3, it is characterized in that, described method, by controlling all submodule DC bus-bar voltage of secondary brachium pontis Arm_s1, regulates the phase difference of transformer primary secondary square wave
namely the rated value of Arm_s1 all submodules DC bus-bar voltage and the deviation of Arm_s1 all submodule DC bus-bar voltage average are as the input of pi regulator, and the output of pi regulator is as phase difference
Described transformer secondary side current average is regulated by the DC component correcting all submodule output voltages of secondary brachium pontis Arm_s1, i.e. transformer secondary side current i
lsthe input as pi regulator is added with the set-point of direct current network electric current, the output of pi regulator and direct current network busbar voltage v after low pass filter LF filtering
dcdeviation is as secondary brachium pontis Arm_s1 direct voltage modulation signal v
s1_dc;
Through above-mentioned square wave modulation and control, converter direct current network side direct current i
dccan realize controlling accurately, and this converter can realize active power filtering and current-limiting function.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108711901A (en) * | 2018-05-23 | 2018-10-26 | 中国矿业大学 | One kind is based on the battery balanced topology of full-bridge cascade connection type and balance control method |
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| CN103580050A (en) * | 2013-11-11 | 2014-02-12 | 国家电网公司 | High-power modularization multi-level lithium battery energy storage converter device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711901A (en) * | 2018-05-23 | 2018-10-26 | 中国矿业大学 | One kind is based on the battery balanced topology of full-bridge cascade connection type and balance control method |
| CN108711901B (en) * | 2018-05-23 | 2021-04-09 | 中国矿业大学 | Full-bridge cascade-type battery equalization topology and equalization control method |
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