CN103956911A - Modularized H-bridge cascade multilevel mutual-balance power electronic transformer - Google Patents
Modularized H-bridge cascade multilevel mutual-balance power electronic transformer Download PDFInfo
- Publication number
- CN103956911A CN103956911A CN201410186532.9A CN201410186532A CN103956911A CN 103956911 A CN103956911 A CN 103956911A CN 201410186532 A CN201410186532 A CN 201410186532A CN 103956911 A CN103956911 A CN 103956911A
- Authority
- CN
- China
- Prior art keywords
- transformer
- voltage
- frequency
- bridge
- electric power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The invention provides a modularized H-bridge cascade multilevel mutual-balance power electronic transformer. Power electronic devices are formed on the basis of IGBTs, the power electronic transformer can achieve four-quadrant controlled operation through an effective control strategy, two-way power flow control can be performed, a H-bridge cascade multilevel modularized structure is adopted for a main circuit, large-scale modularized production is facilitated, actual high-voltage class application can be performed, the harmonic content of output voltage is lower, the switching frequency of the power electronic devices is low, loss is lower, and the voltage-sharing problem is avoided. The system structure of the modularized H-bridge cascade multilevel mutual-balance power electronic transformer is in an AC/DC/AC mode, the high-voltage stage, the isolation stage and the low-voltage stage are achieved, and while the voltage transformation function, the isolation function, the energy transmission function and the like of a conventional transformer are completed, the power flow control and the function of control over the quality of electric energy can be completed.
Description
Technical field
The present invention relates to a kind of transformer, be specifically related to the mutual balancing electric power electronic transformer of a kind of modularization H bridge cascading multiple electrical level.
Background technology
Electric power electric transformer is called again solid-state transformer or flexible transformer, it is that to take electric electronic current change technology and electromagnetic induction technology be basic novel transformer, it has changed the system configuration of traditional transformer thoroughly, realizing on the basis of the basic functions such as conventional electric power transformer voltage grade transformation, electrical isolation and energy transmission, can also realize many additional functionalities such as bi-directional current control, quality of power supply control, be the critical equipment that intelligent grid of future generation is built.Adopt full-control type composite electric insulating electronic device grid bipolar transistors (Insulated Gate Bipolar Transistor, IGBT), can realize the flexible control of electric power electric transformer, facilitate it can be at four quadrant running.Yet the highest withstand voltage of this kind of device is lower than 6.5 kilovolts at present, and the current power distribution network low voltage distribution transformer of China is also more than 10 kilovolts, if adopt the mode of device series average-voltage, also must install in addition equalizer circuit and control method additional, even the two level structures that adopt power device directly to connect, also have dynamic and static voltage-sharing, and dv/dt are larger, can produce reluctant electromagnetic interference problem, exist the hidden danger such as power device inefficacy even punctures.Therefore be subject to the restriction of power electric component development level, be adapted to the high pressure of electrical network demand, the electric power electric transformer that meets four quadrant running of high-power, large electric current from practical also far apart.
The proposition of multilevel converter, for research and the application of mesohigh type high-power converter provides a brand-new thinking, and there are the not commeasurable a series of advantages of two level current transformers,, good voltage waveform high such as output voltage grade, harmonic wave are little etc., and it mainly contains three kinds of topological structures: diode-clamped, leap capacitor-clamped type, have the H bridge cascade connection type of independent direct current voltage source.Leaping the many level current transformers of capacitor-clamped type needs the electric capacity of a large amount of large volumes, and the many level current transformers of diode-clamped exist intrinsic direct current midpoint potential imbalance problem, and the many level current transformers of H bridge cascade voltage type do not exist Neutral-point Potential Fluctuation problem.Some current electric power electric transformer technology do not possess the ability of three-phase electric energy automatic mutual balance, need to control separately and could solve.
Electric power electric transformer is the novel electric power transformer progressively growing up along with the development of high-power electric and electronic technology in recent years.It is being realized on the basis of the basic functions such as conventional electric power transformer voltage grade transformation, electrical isolation and energy transmission, can also realize many additional functionalities such as trend control, quality of power supply control, this is because it can comprise electrical energy parameters such as the amplitude of voltage (or electric current), phase place, frequency, the number of phases, phase sequence and waveforms in working control.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the mutual balancing electric power electronic transformer of a kind of modularization H bridge cascading multiple electrical level, take IGBT as basic comprising power electronic device, utilize effective control strategy to make electric power electric transformer meet four-quadrant controlling run, can carry out bi-directional current control, and main circuit adopts H bridge cascading multiple electrical level modular construction, facilitate extensive modularization to produce, can meet actual voltage levels application, and make harmonic wave of output voltage content lower, devices switch frequency is low, and loss is less, without voltage-sharing.The system configuration that this patent proposes is AC/DC/AC mode, possesses hiigh pressure stage, isolation level and low-pressure stage, when completing the functions such as conventional transformer transformation, isolation, energy transmission, can also complete trend and control and quality of power supply regulatory function.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides the mutual balancing electric power electronic transformer of a kind of modularization H bridge cascading multiple electrical level, described electric power electric transformer comprises AC/DC rectifier, DC/AC current transformer, high frequency transformer, AC/DC current transformer, low-pressure stage DC bus parallel module and DC/AC inverter, industrial frequency AC input signal is transformed to the first d. c. voltage signal through described AC/DC rectifier, described DC/AC current transformer is modulated to high-frequency ac square-wave signal by described the first d. c. voltage signal, described high-frequency ac square-wave signal is realized electric pressure conversion and electromagnetic isolation through described high frequency transformer, described AC/DC current transformer is converted to the second d. c. voltage signal by the high-frequency ac square-wave signal of high frequency transformer output again, described the second d. c. voltage signal inputs to described DC/DC inverter by low-pressure stage DC bus parallel module, DC/AC inverter is transformed to required industrial frequency AC output signal by the second d. c. voltage signal, the power supply of realization to load.
Described AC/DC rectifier consists of a plurality of single-phase H bridge current transformer module-cascades, the electric pressure of surveying to improve electric power electric transformer input; The cascade number of described H bridge converter module depends on the electric pressure of electric power electric transformer power distribution network that high-pressure side connects and the withstand voltage level of power device used, and the three-phase circuit of AC/DC rectifier adopts star structure.
Described DC/AC current transformer is comprised of n single-phase H bridge DC/AC converter module, and its DC side is connected with the DC side of described AC/DC rectifier by high voltage dc bus, completes the first d. c. voltage signal to the conversion of high-frequency ac square-wave signal.
The every phase winding of described high frequency transformer all adopts n to enter three winding constructions that go out, and realizes the high/low conversion of high-frequency ac square-wave signal electric pressure and the electrical isolation of arbitrarily downgrading.
Described AC/DC current transformer is comprised of three independent single-phase H bridge AC/DC converter modules of controlling, and completes high-frequency ac square-wave signal to the conversion of the second d. c. voltage signal.
Described DC/AC inverter is exported needed industrial frequency AC output signal by three single-phase H bridge DC/AC converter modules through LC filter, completes voltage transformation and the delivery of electrical energy of electric power electric transformer.
Described electric power electric transformer also comprises high voltage dc bus unit and low-voltage direct bus unit; Described high voltage dc bus unit is between described AC/DC rectifier and DC/AC current transformer, and described low-voltage direct bus unit is between described AC/DC current transformer and low-pressure stage DC bus parallel module.
Described AC/DC rectifier and DC/AC inverter lay respectively at hiigh pressure stage and low-pressure stage, and described high-frequency AC/DC current transformer, high frequency transformer and high-frequency AC/DC current transformer are all positioned at isolation level.
The control target of described hiigh pressure stage comprises that hiigh pressure stage DC bus-bar voltage is constant and industrial frequency AC input current sinusoidal and power factor is adjustable flexibly;
The AC/DC rectifier that is positioned at hiigh pressure stage adopts Double-loop Control Strategy, i.e. direct voltage outer shroud and exchanges that input current is interior to be encircled;
Direct voltage outer shroud is in order to control AC/DC rectifier DC side voltage constant, and exchanging ring in input current is to carry out Current Control according to the active current command value of direct voltage outer shroud output.
The control target of described isolation level comprises electrical isolation and the electric pressure conversion of hiigh pressure stage and low-pressure stage; The DC/AC current transformer that connects the former limit of high frequency transformer is modulated into high-frequency ac square-wave signal by the first d. c. voltage signal, is coupled to secondary, then is transformed to the second d. c. voltage signal through connecting the AC/DC current transformer of its secondary through high frequency transformer.
The control target of described low-pressure stage is no matter the in the situation that of balanced load or asymmetric load, to realize phase voltage constant amplitude and obtain sinusoidal waveform; The DC/AC inverter of low-pressure stage adopts dicyclo to control, and outer shroud is that output voltage instantaneous value is controlled, and keeps output voltage amplitude constant; Interior ring is that filter capacitor current instantaneous value is controlled, and adopts SPWM to control, and makes the given sine wave of voltage-tracing, maintains the good sine of output waveform.
Compared with prior art, beneficial effect of the present invention is:
1. adopt H bridge cascading multiple electrical level structure, not only can reduce device usage quantity, minimizing harmonic effects but also can adapt to high voltage grade, and there is modular construction characteristic;
2. adopt three-phase sub-unit structure, facilitate three-phase independently to control and can realize again modularization production;
3. adopt the corresponding mutual balanced design in parallel of low-pressure stage DC bus, can realize when low-pressure side or high-pressure side system generation three-phase imbalance, need not adopt special control strategy just can automatically maintain the original poised state of whole system;
4. can realize to and fro flow of power, both can be used as step-down transformer, also can be used as step-up transformer.
Accompanying drawing explanation
Fig. 1 is the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level structure chart;
Fig. 2 is the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level structure chart in the embodiment of the present invention;
Fig. 3 is the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level circuit topological structure figure in the embodiment of the present invention;
Fig. 4 is AC/DC rectifier topology structure figure in the embodiment of the present invention;
Fig. 5 is DC/AC converter topologies figure in the embodiment of the present invention;
Fig. 6 is embodiment of the present invention medium/high frequency transformer topology diagram;
Fig. 7 is AC/DC converter topologies figure in the embodiment of the present invention;
Fig. 8 is embodiment of the present invention mesolow level DC bus parallel module topology diagram;
Fig. 9 is DC/AC inverter topology figure in the embodiment of the present invention;
Figure 10 is embodiment of the present invention mesohigh level control strategy figure;
Figure 11 is isolation level control strategy figure in the embodiment of the present invention;
Figure 12 is embodiment of the present invention mesolow level control strategy figure.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 1-Fig. 3, the invention provides the mutual balancing electric power electronic transformer of a kind of modularization H bridge cascading multiple electrical level, described electric power electric transformer comprises AC/DC rectifier, DC/AC current transformer, high frequency transformer, AC/DC current transformer, low-pressure stage DC bus parallel module and DC/AC inverter, industrial frequency AC input signal is transformed to the first d. c. voltage signal through described AC/DC rectifier, described DC/AC current transformer is modulated to high-frequency ac square-wave signal by described the first d. c. voltage signal, described high-frequency ac square-wave signal is realized electric pressure conversion and electromagnetic isolation through described high frequency transformer, described AC/DC current transformer is converted to the second d. c. voltage signal by the high-frequency ac square-wave signal of high frequency transformer output again, described the second d. c. voltage signal inputs to described DC/DC inverter by low-pressure stage DC bus parallel module, DC/AC inverter is transformed to required industrial frequency AC output signal by the second d. c. voltage signal, the power supply of realization to load.
As Fig. 4, described AC/DC rectifier consists of a plurality of single-phase H bridge current transformer module-cascades, the electric pressure of surveying to improve electric power electric transformer input; The cascade number of described H bridge converter module depends on the electric pressure of electric power electric transformer power distribution network that high-pressure side connects and the withstand voltage level of power device used, and the three-phase circuit of AC/DC rectifier adopts star structure.The advantages such as this topological structure of AC/DC rectifier has that input voltage waveform is good, harmonic content is few, and the good and power factor of current waveform quality is adjustable.
As Fig. 5, described DC/AC current transformer is comprised of n single-phase H bridge DC/AC converter module, and its DC side is connected with the DC side of described AC/DC rectifier by high voltage dc bus, completes the first d. c. voltage signal to the conversion of high-frequency ac square-wave signal.
As Fig. 6, described high frequency transformer frequency is usually operated at KHz (kHz) rank, and the object of high frequency is mainly significantly dwindle the volume of transformer, weight reduction, minimizing heat radiation and improve transformer capacity and efficiency etc.In high frequency transformer, every phase winding all adopts n to enter three winding constructions that go out, and realizes the high/low conversion of high-frequency ac square-wave signal electric pressure and the electrical isolation of arbitrarily downgrading.
As Fig. 7, described AC/DC current transformer is comprised of three independent single-phase H bridge AC/DC converter modules of controlling, and completes high-frequency ac square-wave signal to the conversion of the second d. c. voltage signal.
As Fig. 9, described DC/AC inverter is exported needed industrial frequency AC output signal by three single-phase H bridge DC/AC converter modules through LC filter, completes voltage transformation and the delivery of electrical energy of electric power electric transformer.
H bridge cascade converter DC bus capacitor is separate, is easy to realize the equilibrium control of each cascade module direct voltage.And, often by the identical several voltage-source type single-phase full bridge current transformer cascade of structure, form, be therefore easy to realize modularized design.Because its DC power supply is relatively independent, also can be by its bypass if there is H bridge unit to break down, reliability is high.
The corresponding mutual balanced design in parallel of low-pressure stage DC bus, can realize when low-pressure side or high-pressure side system generation three-phase imbalance, need not adopt special control strategy just can automatically maintain the original poised state of whole system.
Described electric power electric transformer also comprises high voltage dc bus unit and low-voltage direct bus unit; Described high voltage dc bus unit is between described AC/DC rectifier and DC/AC current transformer, and described low-voltage direct bus unit is between described AC/DC current transformer and low-pressure stage DC bus parallel module.
As Fig. 8, the direct voltage output DC of AC/DC current transformer
ai, DC
biand DC
ciin parallel accordingly, form the output DC of described low-pressure stage DC bus parallel module
a, DC
band DC
c, i=1,2,3 wherein.This great advantage at low-voltage bus bar DC side crisscross parallel is to have solved unbalanced the influencing each other of electric power electric transformer high and low pressure side system from structure, and automatically improved power supply reliability, as long as a submodule normal operation just can guarantee basic electricity, greatly improved power supply reliability, and it is simple in structure, control is convenient, this electric power electric transformer that is also this patent designs can be realized the key point of automatic mutual equilibrium function.
As Fig. 2, described AC/DC rectifier and DC/AC inverter lay respectively at hiigh pressure stage and low-pressure stage, and described high-frequency AC/DC current transformer, high frequency transformer and high-frequency AC/DC current transformer are all positioned at isolation level.
As Figure 10, the control target of described hiigh pressure stage comprises that hiigh pressure stage DC bus-bar voltage is constant and industrial frequency AC input current sinusoidal and power factor is adjustable flexibly;
The AC/DC rectifier that is positioned at hiigh pressure stage adopts Double-loop Control Strategy, i.e. direct voltage outer shroud and exchanges that input current is interior to be encircled;
Direct voltage outer shroud is in order to control AC/DC rectifier DC side voltage constant, and exchanging ring in input current is according to the active current command value of direct voltage outer shroud output, to exchange input current to control.As realize the adjustable sine-wave current of power factor and control, adopt voltage feed-forward control decoupling zero to control and make ring (i in three-phase AC/DC converter current
d, i
q) realize decoupling zero, and can eliminate grid disturbances.Adopt feed forward decoupling control strategy, and current regulator and voltage regulator obtaining the Mathematical Modeling equation of hiigh pressure stage H bridge cascade connection multi-level current transformer under dq coordinate system by transformation matrix and be while all adopting PI controller:
Wherein, L is AC filter inductance, i
d, i
qbe respectively three-phase alternating current input current i
a, i
b, i
cd, q axle component;
be respectively d, q axis AC input reference current value; e
d, e
qbe respectively d, the q axle component of three phase network voltage;
be respectively three-phase modulations signal
* d, q axle component.
Transformation matrix is:
For maintaining the constant of direct voltage summation, this patent adopts PI to control, actual DC voltage summation is obtained to actual DC average voltage divided by H bridge cascade module number, by this mean value and given DC voltage average value comparison, export after PI (1) controller as current inner loop active current command value.In addition in order to avoid as far as possible because the not quite identical direct voltage that causes between Cascade H bridge of H pontic characteristic or circuit parameter is uneven, in DC voltage control ring, by the direct voltage of single H bridge module and the comparison of actual DC average voltage, the deviation of output after PI (2) controller as phase shift compensation signal delta δ
i, in order to revise the phase angle difference of each Cascade H bridge module modulating wave, thereby reach, control the constant object of each Cascade H bridge module direct voltage, and adopt phase-shifted SPWM modulation technique.
In alternating current, ring adopts state feedback decoupling to control, three-phase alternating current input current i
a, i
b, i
cthrough coordinate transform, obtain d, q axle component i
d, i
q, respectively with current instruction value separately
relatively, the deviation obtaining is through PI (3), PI (4) controller, then with voltage feed-forward control signal e
d, e
qand i
d, i
qcross feedback decoupling zero signal synthesis, finally as d, q axle modulating wave command voltage signal
after coordinate transform, obtain
be input to hiigh pressure stage modulation signal generator, produce switch controlling signal, thereby realize DC-side Voltage Stabilization, control and exchange the sinusoidal control of input current unity power factor.
As Figure 11, the control target of described isolation level comprises electrical isolation and the electric pressure conversion of hiigh pressure stage and low-pressure stage; The DC/AC current transformer that connects the former limit of high frequency transformer is modulated into high-frequency ac square-wave signal by the first d. c. voltage signal, is coupled to secondary, then is transformed to the second d. c. voltage signal through connecting the AC/DC current transformer of its secondary through high frequency transformer.
The direct voltage U of isolation level secondary converter
owith with reference to direct voltage U
refdo, after difference, through PI, to regulate and obtain former limit converter voltage u
abwith secondary converter voltage u
cdphase shifting angle θ, by controlling phase shifting angle θ, realize the DC bus-bar voltage of determining of secondary converter and control.
As Figure 12, the control target of described low-pressure stage is no matter the in the situation that of balanced load or asymmetric load, to realize phase voltage constant amplitude and obtain sinusoidal waveform; The DC/AC inverter of low-pressure stage adopts dicyclo to control, and outer shroud is that output voltage instantaneous value is controlled, and keeps output voltage amplitude constant; Interior ring is that filter capacitor current instantaneous value is controlled, and adopts SPWM to control, and makes the given sine wave of voltage-tracing, maintains the good sine of output waveform.
At outer shroud, measure output phase voltage instantaneous value u
0with sinusoidal wave reference voltage u
refrelatively, form error signal, process PI controller is as the instantaneous reference value of current inner loop, with the filter capacitor current i of feedback
ccompare, the margin of error obtains modulating wave u after P controller
r, with triangle wave, form pulse signal and drive inverter.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (11)
1. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level, is characterized in that: described electric power electric transformer comprises AC/DC rectifier, DC/AC current transformer, high frequency transformer, AC/DC current transformer, low-pressure stage DC bus parallel module and DC/AC inverter, industrial frequency AC input signal is transformed to the first d. c. voltage signal through described AC/DC rectifier, described DC/AC current transformer is modulated to high-frequency ac square-wave signal by described the first d. c. voltage signal, described high-frequency ac square-wave signal is realized electric pressure conversion and electromagnetic isolation through described high frequency transformer, described AC/DC current transformer is converted to the second d. c. voltage signal by the high-frequency ac square-wave signal of high frequency transformer output again, described the second d. c. voltage signal inputs to described DC/DC inverter by low-pressure stage DC bus parallel module, DC/AC inverter is transformed to required industrial frequency AC output signal by the second d. c. voltage signal, the power supply of realization to load.
2. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 1, it is characterized in that: described AC/DC rectifier consists of a plurality of single-phase H bridge current transformer module-cascades the electric pressure of surveying to improve electric power electric transformer input; The cascade number of described H bridge converter module depends on the electric pressure of electric power electric transformer power distribution network that high-pressure side connects and the withstand voltage level of power device used, and the three-phase circuit of AC/DC rectifier adopts star structure.
3. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 1, it is characterized in that: described DC/AC current transformer is comprised of n single-phase H bridge DC/AC converter module, its DC side is connected with the DC side of described AC/DC rectifier by high voltage dc bus, completes the first d. c. voltage signal to the conversion of high-frequency ac square-wave signal.
4. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 1, it is characterized in that: the every phase winding of described high frequency transformer all adopts n to enter three winding constructions that go out, realize the high/low conversion of high-frequency ac square-wave signal electric pressure and the electrical isolation of arbitrarily downgrading.
5. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 1, it is characterized in that: described AC/DC current transformer is comprised of three independent single-phase H bridge AC/DC converter modules of controlling, and completes high-frequency ac square-wave signal to the conversion of the second d. c. voltage signal.
6. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 1, it is characterized in that: described DC/AC inverter is exported needed industrial frequency AC output signal by three single-phase H bridge DC/AC converter modules through LC filter, completes voltage transformation and the delivery of electrical energy of electric power electric transformer.
7. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 1, is characterized in that: described electric power electric transformer also comprises high voltage dc bus unit and low-voltage direct bus unit; Described high voltage dc bus unit is between described AC/DC rectifier and DC/AC current transformer, and described low-voltage direct bus unit is between described AC/DC current transformer and low-pressure stage DC bus parallel module.
8. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 1, it is characterized in that: described AC/DC rectifier and DC/AC inverter lay respectively at hiigh pressure stage and low-pressure stage, described high-frequency AC/DC current transformer, high frequency transformer and high-frequency AC/DC current transformer are all positioned at isolation level.
9. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 8, is characterized in that: the control target of described hiigh pressure stage comprises that hiigh pressure stage DC bus-bar voltage is constant and industrial frequency AC input current sinusoidal and power factor is adjustable flexibly;
The AC/DC rectifier that is positioned at hiigh pressure stage adopts Double-loop Control Strategy, i.e. direct voltage outer shroud and exchanges that input current is interior to be encircled;
Direct voltage outer shroud is in order to control AC/DC rectifier DC side voltage constant, and exchanging ring in input current is to carry out Current Control according to the active current command value of direct voltage outer shroud output.
10. the mutual balancing electric power electronic transformer of modularization H bridge cascading multiple electrical level according to claim 8, is characterized in that: the control target of described isolation level comprises electrical isolation and the electric pressure conversion of hiigh pressure stage and low-pressure stage; The DC/AC current transformer that connects the former limit of high frequency transformer is modulated into high-frequency ac square-wave signal by the first d. c. voltage signal, is coupled to secondary, then is transformed to the second d. c. voltage signal through connecting the AC/DC current transformer of its secondary through high frequency transformer.
The mutual balancing electric power electronic transformer of 11. modularization H bridge cascading multiple electrical level according to claim 8, is characterized in that: the control target of described low-pressure stage is no matter the in the situation that of balanced load or asymmetric load, to realize phase voltage constant amplitude and obtain sinusoidal waveform; The DC/AC inverter of low-pressure stage adopts dicyclo to control, and outer shroud is that output voltage instantaneous value is controlled, and keeps output voltage amplitude constant; Interior ring is that filter capacitor current instantaneous value is controlled, and adopts SPWM to control, and makes the given sine wave of voltage-tracing, maintains the good sine of output waveform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186532.9A CN103956911A (en) | 2014-05-05 | 2014-05-05 | Modularized H-bridge cascade multilevel mutual-balance power electronic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186532.9A CN103956911A (en) | 2014-05-05 | 2014-05-05 | Modularized H-bridge cascade multilevel mutual-balance power electronic transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103956911A true CN103956911A (en) | 2014-07-30 |
Family
ID=51334154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410186532.9A Pending CN103956911A (en) | 2014-05-05 | 2014-05-05 | Modularized H-bridge cascade multilevel mutual-balance power electronic transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103956911A (en) |
Cited By (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578166A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Alternating current-direct current micro-grid system on basis of electricity energy collector |
| CN104852601A (en) * | 2015-05-27 | 2015-08-19 | 广西大学 | Cascaded multi-level power electronic transformer based on DSP (Digital Signal Processor)/FPGA (Field Programmable Gate Array) cooperative control |
| CN104868762A (en) * | 2015-06-04 | 2015-08-26 | 广西电网有限责任公司电力科学研究院 | DES (distributed energy storage) power electronic transformer, and control method therefor |
| CN104993505A (en) * | 2015-06-30 | 2015-10-21 | 湘潭大学 | Voltage and power balance control method for modular power electric transformer |
| CN105048788A (en) * | 2015-06-04 | 2015-11-11 | 广西电网有限责任公司电力科学研究院 | Multi-port power electronic transformer of mixed cascading structure, and control method thereof |
| CN105099206A (en) * | 2015-08-18 | 2015-11-25 | 南车株洲电力机车研究所有限公司 | Direct current-direct current solid-state transformer |
| CN105811456A (en) * | 2016-03-24 | 2016-07-27 | 中国电力科学研究院 | Power electronic transformer based microgrid intelligent gateway system and control method therefor |
| CN106026685A (en) * | 2016-05-23 | 2016-10-12 | 清华大学 | Topological structure of three-phase power electronic transformer employing low-fluctuation DC bus capacitors |
| CN106026683A (en) * | 2016-05-06 | 2016-10-12 | 国家电网公司 | Energy router topology structure realizing distributed power supply integration |
| CN106208638A (en) * | 2015-04-30 | 2016-12-07 | 神华集团有限责任公司 | Device for converting electric energy and corresponding electric energy management connection system |
| CN106452133A (en) * | 2016-09-27 | 2017-02-22 | 河南理工大学 | Core converter for building bipolar DC microgrid and control method of core converter |
| CN106452096A (en) * | 2016-09-05 | 2017-02-22 | 全球能源互联网研究院 | Electric bridge structure, commutation circuit and power electronic transformer |
| CN106655841A (en) * | 2017-01-13 | 2017-05-10 | 昆明理工大学 | Novel three-phase current converter topology based on modular multilevel converter |
| CN107070247A (en) * | 2017-05-19 | 2017-08-18 | 浙江大学 | A kind of electric power electric transformer based on cascade connection multi-level |
| CN107370396A (en) * | 2017-08-16 | 2017-11-21 | 南通鑫源电器制造有限公司 | A kind of electric power electric transformer and its voltage-transforming method of tandem mesohigh power network |
| CN107733244A (en) * | 2017-10-11 | 2018-02-23 | 西安交通大学 | A kind of electric power electric transformer and its control method with arc suppression coil |
| CN107800299A (en) * | 2017-04-24 | 2018-03-13 | 湖南大学 | Modularized dc transformation system and its control method based on MMC high frequency conversions |
| CN108306517A (en) * | 2018-01-16 | 2018-07-20 | 东南大学 | The topological structure and its control method of two-stage type multiport electric power electric transformer |
| CN108551266A (en) * | 2018-05-11 | 2018-09-18 | 燕山大学 | A kind of self-balancing electric power electric transformer and control method adapting to asymmetric load |
| CN109194173A (en) * | 2018-09-14 | 2019-01-11 | 四川大学 | The load balance range optimization method of single-phase cascaded H-bridges Multilevel Inverters |
| CN109361206A (en) * | 2018-09-28 | 2019-02-19 | 哈尔滨中创电气技术有限公司 | A kind of ship medium voltage network structure and its energy control method based on multiterminal DC-DC converter |
| CN109672320A (en) * | 2017-10-13 | 2019-04-23 | 维谛技术有限公司 | A kind of transformation of electrical energy circuit, power electronic equipment, related system and method |
| CN109713917A (en) * | 2017-10-25 | 2019-05-03 | 中兴通讯股份有限公司 | Fairing and rectification control method |
| CN109888777A (en) * | 2019-03-14 | 2019-06-14 | 王阳 | Multifucntional comprehensive distribution equipment |
| CN109980913A (en) * | 2017-12-27 | 2019-07-05 | 中兴通讯股份有限公司 | Switching Power Supply, voltage output method |
| CN110048623A (en) * | 2019-05-28 | 2019-07-23 | 中国矿业大学(北京) | Line voltage cascaded three-phase diode high power factor converter and its control strategy |
| CN110442042A (en) * | 2019-08-13 | 2019-11-12 | 华北电力大学 | Electric car accesses electric power electric transformer number physical mixed real-time emulation system |
| CN111106754A (en) * | 2020-01-13 | 2020-05-05 | 湖南大学 | High-voltage transmission line power-taking power conversion system |
| CN111585299A (en) * | 2019-02-18 | 2020-08-25 | 中国电力科学研究院有限公司 | Direct-current energy router and control method thereof |
| CN111865120A (en) * | 2020-05-23 | 2020-10-30 | 青岛鼎信通讯股份有限公司 | Energy router alternating current side modulation method based on serial digital voltage stabilizer |
| CN112332683A (en) * | 2020-11-10 | 2021-02-05 | 青岛鼎信通讯股份有限公司 | Power electronic transformer based on square wave converter |
| CN112398308A (en) * | 2019-08-14 | 2021-02-23 | 南京南瑞继保电气有限公司 | Multi-port energy router and control system and control method thereof |
| CN112398349A (en) * | 2020-10-19 | 2021-02-23 | 浙江大学 | Alternating current-direct current interconnection isolation type bidirectional DC/AC converter and bidirectional sharing control method thereof |
| CN112953254A (en) * | 2021-03-29 | 2021-06-11 | 山东电工电气集团有限公司 | Three-phase power electronic transformer topology and control method thereof |
| CN114142740A (en) * | 2021-11-19 | 2022-03-04 | 广东福德电子有限公司 | High-capacity multifunctional power supply system structure and control method thereof |
| WO2022068222A1 (en) * | 2020-09-30 | 2022-04-07 | 阳光电源股份有限公司 | Cascaded power electronic transformer and control method therefor |
| CN114362485A (en) * | 2022-01-13 | 2022-04-15 | 深圳市英威腾电气股份有限公司 | PWM current transformation system of PWM current transformation control device |
| CN115995965A (en) * | 2023-03-22 | 2023-04-21 | 浙江大学杭州国际科创中心 | Modularized wide-input wide-output voltage range DC-DC converter |
| WO2023066068A1 (en) * | 2021-10-18 | 2023-04-27 | 成都尚华电气有限公司 | Three-phase traction transmission power supply system for multiple units |
| CN117955427A (en) * | 2024-02-01 | 2024-04-30 | 中科智寰(北京)科技有限公司 | Low-voltage output direct-current electric energy router and photovoltaic access power supply system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| CN103490420A (en) * | 2013-10-14 | 2014-01-01 | 上海电力学院 | Grid-connected control method of micro-grid based on auto-disturbance-rejection technique |
| CN103516230A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Bi-directional power flow controlled multi-level mutual balance solid state transformer and realization method thereof |
| CN103746393A (en) * | 2013-12-27 | 2014-04-23 | 西安交通大学 | A three-phase power electronic transformer capable of automatically balancing asymmetric loads in a total range |
| CN203827197U (en) * | 2014-05-05 | 2014-09-10 | 国家电网公司 | Modular H bridge cascaded multilevel mutually-balanced electric power electronic transformer |
-
2014
- 2014-05-05 CN CN201410186532.9A patent/CN103956911A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| CN103490420A (en) * | 2013-10-14 | 2014-01-01 | 上海电力学院 | Grid-connected control method of micro-grid based on auto-disturbance-rejection technique |
| CN103516230A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Bi-directional power flow controlled multi-level mutual balance solid state transformer and realization method thereof |
| CN103746393A (en) * | 2013-12-27 | 2014-04-23 | 西安交通大学 | A three-phase power electronic transformer capable of automatically balancing asymmetric loads in a total range |
| CN203827197U (en) * | 2014-05-05 | 2014-09-10 | 国家电网公司 | Modular H bridge cascaded multilevel mutually-balanced electric power electronic transformer |
Non-Patent Citations (1)
| Title |
|---|
| 何金平: "自平衡电子电力变压器试验系统的研制", 《CNKI优秀硕士学位论文全文库》, no. 05, 15 May 2009 (2009-05-15), pages 13 - 17 * |
Cited By (56)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578166A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Alternating current-direct current micro-grid system on basis of electricity energy collector |
| CN106208638A (en) * | 2015-04-30 | 2016-12-07 | 神华集团有限责任公司 | Device for converting electric energy and corresponding electric energy management connection system |
| CN104852601A (en) * | 2015-05-27 | 2015-08-19 | 广西大学 | Cascaded multi-level power electronic transformer based on DSP (Digital Signal Processor)/FPGA (Field Programmable Gate Array) cooperative control |
| CN104868762A (en) * | 2015-06-04 | 2015-08-26 | 广西电网有限责任公司电力科学研究院 | DES (distributed energy storage) power electronic transformer, and control method therefor |
| CN105048788A (en) * | 2015-06-04 | 2015-11-11 | 广西电网有限责任公司电力科学研究院 | Multi-port power electronic transformer of mixed cascading structure, and control method thereof |
| CN105048788B (en) * | 2015-06-04 | 2017-11-28 | 广西电网有限责任公司电力科学研究院 | The multiport electric power electric transformer and its control method of a kind of Mixed cascading structure |
| CN104993505A (en) * | 2015-06-30 | 2015-10-21 | 湘潭大学 | Voltage and power balance control method for modular power electric transformer |
| CN105099206A (en) * | 2015-08-18 | 2015-11-25 | 南车株洲电力机车研究所有限公司 | Direct current-direct current solid-state transformer |
| CN105099206B (en) * | 2015-08-18 | 2018-06-19 | 南车株洲电力机车研究所有限公司 | A kind of DC-DC solid-state transformer |
| CN105811456A (en) * | 2016-03-24 | 2016-07-27 | 中国电力科学研究院 | Power electronic transformer based microgrid intelligent gateway system and control method therefor |
| CN106026683A (en) * | 2016-05-06 | 2016-10-12 | 国家电网公司 | Energy router topology structure realizing distributed power supply integration |
| CN106026685A (en) * | 2016-05-23 | 2016-10-12 | 清华大学 | Topological structure of three-phase power electronic transformer employing low-fluctuation DC bus capacitors |
| CN106452096B (en) * | 2016-09-05 | 2019-08-27 | 全球能源互联网研究院有限公司 | A kind of bridge structure, converter circuit and electric power electric transformer |
| CN106452096A (en) * | 2016-09-05 | 2017-02-22 | 全球能源互联网研究院 | Electric bridge structure, commutation circuit and power electronic transformer |
| CN106452133A (en) * | 2016-09-27 | 2017-02-22 | 河南理工大学 | Core converter for building bipolar DC microgrid and control method of core converter |
| CN106452133B (en) * | 2016-09-27 | 2019-06-25 | 河南理工大学 | A kind of core current transformer and its control method constructing bipolarity direct-current micro-grid |
| CN106655841A (en) * | 2017-01-13 | 2017-05-10 | 昆明理工大学 | Novel three-phase current converter topology based on modular multilevel converter |
| CN107800299A (en) * | 2017-04-24 | 2018-03-13 | 湖南大学 | Modularized dc transformation system and its control method based on MMC high frequency conversions |
| CN107070247A (en) * | 2017-05-19 | 2017-08-18 | 浙江大学 | A kind of electric power electric transformer based on cascade connection multi-level |
| CN107370396A (en) * | 2017-08-16 | 2017-11-21 | 南通鑫源电器制造有限公司 | A kind of electric power electric transformer and its voltage-transforming method of tandem mesohigh power network |
| CN107733244A (en) * | 2017-10-11 | 2018-02-23 | 西安交通大学 | A kind of electric power electric transformer and its control method with arc suppression coil |
| CN107733244B (en) * | 2017-10-11 | 2019-12-24 | 西安交通大学 | Power electronic transformer with arc suppression coil and control method thereof |
| CN109672320A (en) * | 2017-10-13 | 2019-04-23 | 维谛技术有限公司 | A kind of transformation of electrical energy circuit, power electronic equipment, related system and method |
| CN109713917A (en) * | 2017-10-25 | 2019-05-03 | 中兴通讯股份有限公司 | Fairing and rectification control method |
| CN109980913A (en) * | 2017-12-27 | 2019-07-05 | 中兴通讯股份有限公司 | Switching Power Supply, voltage output method |
| CN109980913B (en) * | 2017-12-27 | 2021-11-02 | 中兴通讯股份有限公司 | Switching power supply and voltage output method |
| CN108306517A (en) * | 2018-01-16 | 2018-07-20 | 东南大学 | The topological structure and its control method of two-stage type multiport electric power electric transformer |
| CN108306517B (en) * | 2018-01-16 | 2020-05-05 | 东南大学 | Topological structure of two-stage type multi-port power electronic transformer and control method thereof |
| CN108551266A (en) * | 2018-05-11 | 2018-09-18 | 燕山大学 | A kind of self-balancing electric power electric transformer and control method adapting to asymmetric load |
| CN109194173A (en) * | 2018-09-14 | 2019-01-11 | 四川大学 | The load balance range optimization method of single-phase cascaded H-bridges Multilevel Inverters |
| CN109361206B (en) * | 2018-09-28 | 2022-05-10 | 哈尔滨中创电气技术有限公司 | Energy control method of ship medium-voltage power grid structure based on multi-terminal DC-DC converter |
| CN109361206A (en) * | 2018-09-28 | 2019-02-19 | 哈尔滨中创电气技术有限公司 | A kind of ship medium voltage network structure and its energy control method based on multiterminal DC-DC converter |
| CN111585299A (en) * | 2019-02-18 | 2020-08-25 | 中国电力科学研究院有限公司 | Direct-current energy router and control method thereof |
| CN111585299B (en) * | 2019-02-18 | 2023-11-14 | 中国电力科学研究院有限公司 | Direct current energy router and control method thereof |
| CN109888777A (en) * | 2019-03-14 | 2019-06-14 | 王阳 | Multifucntional comprehensive distribution equipment |
| CN109888777B (en) * | 2019-03-14 | 2024-02-20 | 王阳 | Multifunctional comprehensive power distribution device |
| CN110048623B (en) * | 2019-05-28 | 2023-08-18 | 中国矿业大学(北京) | Line voltage cascade three-phase diode high-power factor converter and control strategy thereof |
| CN110048623A (en) * | 2019-05-28 | 2019-07-23 | 中国矿业大学(北京) | Line voltage cascaded three-phase diode high power factor converter and its control strategy |
| CN110442042A (en) * | 2019-08-13 | 2019-11-12 | 华北电力大学 | Electric car accesses electric power electric transformer number physical mixed real-time emulation system |
| CN110442042B (en) * | 2019-08-13 | 2021-01-15 | 华北电力大学 | Digital physical hybrid real-time simulation system for electric vehicle to be connected with power electronic transformer |
| CN112398308A (en) * | 2019-08-14 | 2021-02-23 | 南京南瑞继保电气有限公司 | Multi-port energy router and control system and control method thereof |
| CN112398308B (en) * | 2019-08-14 | 2022-08-26 | 南京南瑞继保电气有限公司 | Multi-port energy router and control system and control method thereof |
| CN111106754A (en) * | 2020-01-13 | 2020-05-05 | 湖南大学 | High-voltage transmission line power-taking power conversion system |
| CN111106754B (en) * | 2020-01-13 | 2022-02-08 | 湖南大学 | High-voltage transmission line power-taking power conversion system |
| CN111865120A (en) * | 2020-05-23 | 2020-10-30 | 青岛鼎信通讯股份有限公司 | Energy router alternating current side modulation method based on serial digital voltage stabilizer |
| CN111865120B (en) * | 2020-05-23 | 2023-07-07 | 青岛鼎信通讯股份有限公司 | Energy router alternating current side modulation method based on serial digital voltage stabilizer |
| WO2022068222A1 (en) * | 2020-09-30 | 2022-04-07 | 阳光电源股份有限公司 | Cascaded power electronic transformer and control method therefor |
| CN112398349A (en) * | 2020-10-19 | 2021-02-23 | 浙江大学 | Alternating current-direct current interconnection isolation type bidirectional DC/AC converter and bidirectional sharing control method thereof |
| CN112332683A (en) * | 2020-11-10 | 2021-02-05 | 青岛鼎信通讯股份有限公司 | Power electronic transformer based on square wave converter |
| CN112953254A (en) * | 2021-03-29 | 2021-06-11 | 山东电工电气集团有限公司 | Three-phase power electronic transformer topology and control method thereof |
| WO2023066068A1 (en) * | 2021-10-18 | 2023-04-27 | 成都尚华电气有限公司 | Three-phase traction transmission power supply system for multiple units |
| CN114142740B (en) * | 2021-11-19 | 2023-09-22 | 广东福德电子有限公司 | High-capacity multifunctional power supply system structure and control method thereof |
| CN114142740A (en) * | 2021-11-19 | 2022-03-04 | 广东福德电子有限公司 | High-capacity multifunctional power supply system structure and control method thereof |
| CN114362485A (en) * | 2022-01-13 | 2022-04-15 | 深圳市英威腾电气股份有限公司 | PWM current transformation system of PWM current transformation control device |
| CN115995965A (en) * | 2023-03-22 | 2023-04-21 | 浙江大学杭州国际科创中心 | Modularized wide-input wide-output voltage range DC-DC converter |
| CN117955427A (en) * | 2024-02-01 | 2024-04-30 | 中科智寰(北京)科技有限公司 | Low-voltage output direct-current electric energy router and photovoltaic access power supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103956911A (en) | Modularized H-bridge cascade multilevel mutual-balance power electronic transformer | |
| CN203827197U (en) | Modular H bridge cascaded multilevel mutually-balanced electric power electronic transformer | |
| WO2021017170A1 (en) | Modularized multilevel converter for multi-port direct current power flow control and control method | |
| CN103516230B (en) | Many level that bi-directional current controls balance solid-state transformer and its implementation mutually | |
| CN105048788B (en) | The multiport electric power electric transformer and its control method of a kind of Mixed cascading structure | |
| CN102739071B (en) | Method for controlling direct current capacitor voltage of modular multi-level converter based on circulating current decoupling | |
| CN105490552A (en) | Modular multilevel converter (MMC) based solid-state transformer and control method thereof | |
| CN109756121B (en) | MMC-based isolated DC-DC direct current converter and control method | |
| CN104836424A (en) | Energy router with cascaded module voltage automatic balancing circuit | |
| CN102594160A (en) | Diode clamped three-level high-voltage matrix converter and modulation method thereof | |
| CN104319809A (en) | Three-phase photovoltaic inversion device based on transformer cascading technology | |
| CN103904909A (en) | Double-PWM frequency converter integrated coordinated control system based on fractional order control | |
| CN102769291B (en) | Active power filter based on multiphase converter structure | |
| CN103051236A (en) | CHB cascaded photovoltaic inverter circuit based on three-phase multi-split transformer | |
| CN203491898U (en) | Bidirectional tide-controlled modularized multi-level mutually-balanced solid-state transformer | |
| CN113346764B (en) | Medium-voltage converter topological structure based on high-frequency magnetic coupling module | |
| CN102545675B (en) | Hybrid series H-bridge multi-level grid-connected inverter direct current bus voltage control method | |
| CN105305843A (en) | Three-phase series half H-bridge modular multilevel DC converter and control method thereof | |
| CN205389177U (en) | Novel many level of modularization type solid -state transformer | |
| CN107332257A (en) | A kind of STATCOM and its control method | |
| CN106099969A (en) | A kind of megawatt-grade high-power wired in parallel control method based on series inductance | |
| Duan et al. | Research on power quality control in distribution grid based on energy router | |
| CN106877674B (en) | Mode of resonance DC/DC inverter power balance control method and control system | |
| CN105429472A (en) | Star angle-shape rectifier-type high-power DC step-up converter and control method thereof | |
| CN112072669B (en) | Variable ratio voltage regulation and current compensation autotransformer and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140730 |
|
| RJ01 | Rejection of invention patent application after publication |