CN106655805A - MMC-based multi-port hybrid power electronic transformer and control method thereof - Google Patents
MMC-based multi-port hybrid power electronic transformer and control method thereof Download PDFInfo
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- CN106655805A CN106655805A CN201710139460.6A CN201710139460A CN106655805A CN 106655805 A CN106655805 A CN 106655805A CN 201710139460 A CN201710139460 A CN 201710139460A CN 106655805 A CN106655805 A CN 106655805A
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Classifications
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Control Of Electrical Variables (AREA)
Abstract
The invention provides an MMC-based multi-port hybrid power electronic transformer and a control method thereof. The power electronic transformer comprises a multi-winding transformer, a hybrid MMC converter, an LC filter, a direct-current output port and the like; the multi-winding transformer is a three-phase transformer, and comprises a primary winding and secondary windings a and b; the hybrid MMC converter is a back-to-back structure, and comprises a hybrid MMC structured AC/DC converter and a hybrid MMC structured DC/AC converter; the AC/DC converter and the DC/AC converter are connected through a direct-current side; and the direct-current side is leaded out, and can be used as a direct-current input/output port. The hybrid power electronic transformer provided by the invention comprises the traditional power transformer and the power electronic transformer, and integrates the advantages of the two; balance between the equipment effect and the cost is realized; the device comprises the direct-current port, so that access of a new energy, an energy storage unit and the like is convenient; furthermore, the device can realize reactive power compensation and dynamic voltage restorer at the same time; the electric energy quality of a power grid is further improved; individual-phase control is adopted in the control strategy aspect; and thus, the control strategy flexibility is improved.
Description
Technical field
The present invention relates to a kind of multiport hybrid power electronic transformer and its control method based on MMC, belongs to electricity
The technical field of power electronic application.
Background technology
With economic fast development, the progressively expansion of social production scale, various forms of electricity needs constantly increase,
Requirement to power electronic equipment also more and more higher, Power Electronic Technique is developed rapidly therewith, and wherein multi-level converter is because of tool
There is output voltage height, harmonic content is low, voltage change ratio is little, device for power switching voltage stress is little, the low advantage of switching frequency
It is increasingly becoming the study hotspot of high-power electric power application.
Traditional power transformer as power system basic equipment, with simple structure, reliability is high the features such as.But
The problems such as traditional power transformer there is also that equipment volume is big, be also easy to produce harmonic wave, the uncontrollable quality of power supply.In recent years, by
In the high speed development of Power Electronic Technique especially power electronic devices technology, electric power electric transformer (Power
Electronic Transformer, PET) closed by more and more Chinese scholars as a kind of new power transformer
Note and attention.Electric power electric transformer not only has the functions such as traditional transformer isolation, voltage of transformation, transmission energy concurrently, can also be real
The improvement of the existing quality of power supply and the access of new forms of energy, its application will be very wide.But relative to traditional power transformer,
At present the equipment cost of electric power electric transformer is higher.Therefore, traditional power transformer is tied with electric power electric transformer
Close, the balance between equipment effect and cost can be realized simultaneously using both advantages, thus become current research heat
Point.
The content of the invention
The purpose of the present invention is to propose to a kind of multiport hybrid power electronic transformer and its controlling party based on MMC
Method, on the basis of traditional power frequency electric power transformator, constitutes hybrid power electronic transformer in combination with power electronic devices,
Realize that real power control, idle control, voltage control etc. adjust algorithm.
A kind of multiport hybrid power electronic transformer based on MMC proposed by the present invention, including multiwinding transformer,
Mixed type MMC changer, LC wave filter and direct current output port, described multiwinding transformer include armature winding, it is secondary around
Group a and secondary windings b；Armature winding is connected with electrical network, and the winding in each phases of secondary windings a is directly connected with load, secondary
Winding b is connected with mixed type MMC changer, and winding a is accessed Jing after LC wave filter.
Described multiwinding transformer is three-phase transformer.
Described mixed type MMC changer is three-phase back to back structure, and mixed type MMC changer includes AC/DC changers
With DC/AC changers.
Described AC/DC changers and DC/AC changers is mixed type MMC structure, and AC/DC changers and DC/AC are converted
Upper and lower each bridge arm of MMC structures at least includes that 1 module a, 2 modules b and 1 inductance are in series in device, upper and lower two
Bridge arm constitutes 1 group.
The half-bridge structure and DC capacitor that described module a is made up of two IGBT with anti-paralleled diode is constituted.
The full bridge structure and DC capacitor that described module b is made up of four IGBT with anti-paralleled diode is constituted.
Described AC/DC changers are connected with DC/AC changers by DC side, and DC side is drawn can be defeated as direct current
Enter/output port；AC/DC changers are connected by LC wave filter with winding b, DC/AC changers then by LC wave filter with around
Group a is connected.
Its control method includes the control of the balance of voltage and loop current suppression, reactive power compensation control and the dynamic of MMC
Voltage recovers control；
The balance of voltage of described MMC and loop current suppression control include that balancing energy is controlled and voltage balance control, pass through
Control active power, maintain DC-side Voltage Stabilization, it is ensured that changer can normal work, balancing energy control control input arrive
The distribution of changer active power, while realizing the suppression to circulation；Voltage balance control is by electric capacity electricity in control submodule
Pressure tracks its reference value, adjusts the active power of submodule, equal with the capacitance voltage for realizing each group of upper and lower bridge arm Neutron module
Weighing apparatus control；
The reactive power compensation control is realized by mixed type MMC structure AC/DC changer, including compensation Current calculation
And closed-loop current control, based on the independence of topology, using phase splitting compensation control, first gather phase voltage, phase current and entered
Abc/dq0 conversion is carried out after row synthesis, further according to instantaneous power theory active-power P is calculatedrefAnd reactive power Qref, i.e.,：
In formula, ud、uq, id、iqThe respectively component of phase voltage, phase current in dq coordinate systems；
Subsequently, according to reactive-load compensation coefficient set in advance, reactive-load compensation electric current is calculated, as the ginseng of output compensation electric current
Value is examined, control signal is obtained by closed-loop current control, eventually pass the switching signal that PWM generates power device；
The dynamic electric voltage is recovered control and is realized by mixed type MMC structure DC/AC changer, including voltage detecting and benefit
Repay voltage to calculate and voltage x current double -loop control, then control signal is obtained by voltage x current double -loop control, adjust finally by PWM
System generates the switching signal of power device, wherein
The Voltage loop governing equation is：
In formula,Respectively Voltage loop output control signal；ω is electrical network angular frequency；C1For LC filter capacities
Value；uod、uoqFor component of the capacitance voltage under dq axles；Kp1、Ki1The respectively ratio of pi regulator, integral coefficient；Offset voltage reference value is exported for changer；icd、icqFor flow through LC filter capacities electric current under dq axles point
Amount；
The current loop control equation is：
In formula,For electric current loop output control signal；ω is electrical network angular frequency；L1For changer output LC filtering
Device inductance value；icd、icqTo flow through component of the LC filter capacities electric current under dq axles；Kp2、Ki2The respectively ratio of pi regulator
Example, integral coefficient；Respectively Voltage loop output control signal.
Beneficial effect：Be compared with the prior art, the present invention the multiport hybrid power electronic transformer based on MMC and
Its control strategy, in addition to the function that possesses traditional power transformer and advantage, relative to current domestic and international proposed design
Scheme, also with following function and feature：
Hybrid power electronic transformer equipment includes traditional power transformer and electric power electric transformer, has both concurrently
Advantage, realizes the balance of equipment effect and cost.
Changer is based on MMC structures, by its modular nature electric power electric transformer is more adapted to for height
Electric pressure occasion.
Mixed type MMC changer Neutron module, by introducing negative voltage, increased using half-bridge and full-bridge mixed structure
The voltage magnitude of MMC ACs, improves the voltage compensation capacity of device.
Transformator also has DC port in addition to AC port, is capable of achieving direct current input/output function, facilitates new energy
Source, energy-storage units etc. are accessed.
Compared to traditional power transformer, device can also implement power quality controlling, such as reactive power compensation and dynamic
Voltage recovers.And by above two control measures simultaneously with the quality of power supply that can further improve electrical network, in control strategy
Aspect adopts individual-phase control, improves the motility of control strategy.
Description of the drawings
Fig. 1 is represented based on the multiport hybrid power electronic transformer overall structure block diagram of MMC；
Fig. 2 represents the mixed type MMC structured flowchart in hybrid power electronic transformer；
Fig. 3 represents the balance of voltage of MMC and loop current suppression control block diagram in hybrid power electronic transformer；
Fig. 4 represents reactive power compensation (SVG) control block diagram；
Fig. 5 represents that dynamic electric voltage recovers (DVR) control block diagram；
Have in figure above：Partly leading in semiconductor switch T1, module a in DC capacitor C1, module a in module a
The negative pole end B in positive terminal A, module a in body switch T2, module a.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described.
Multiport hybrid power electronic transformer of the present invention based on MMC is by traditional power transformer and mixed type
MMC is constituted, and wherein the module in mixed type MMC is made up of half-bridge submodule and full-bridge submodule.
A kind of as Figure 1-5, multiport hybrid power electronic transformer based on MMC, including multiwinding transformer,
Mixed type MMC changer, LC wave filter and direct current output port, multiwinding transformer includes armature winding, secondary windings a and secondary
Level winding b；Armature winding is connected with electrical network, the winding in each phases of secondary windings a directly with load be connected, secondary windings b and
Mixed type MMC changer is connected, and winding a is accessed Jing after LC wave filter.
As shown in figure 1, the figure is based on the multiport hybrid power electronic transformer topology diagram of MMC, its is main
Including multiwinding transformer, mixed type MMC changer, LC wave filter, direct current output port etc..The multiwinding transformer is three
Phase transformer, comprising armature winding and secondary windings a, b.Armature winding is connected with electrical network, the winding a in each phase of secondary windings
Directly it is connected with load, winding b is connected with mixed type MMC changer, Jing LC wave filter accesses winding a.
Fig. 2 show the mixed type MMC structured flowchart in hybrid power electronic transformer.Mixed type MMC changer is
Three-phase back to back structure, comprising mixed type MMC structure AC/DC changer and mixed type MMC structure DC/AC changer.Each change
Parallel operation is based on three-phase MMC structures, and each bridge arm is by X module a and Y module b and inductance Lxy(x=a, b；Y=p, n) goes here and there
Connection is constituted, and 1 group is constituted per upper and lower two bridge arms.Wherein, the half-bridge that module a is made up of two IGBT with anti-paralleled diode
Structure and DC capacitor are constituted.Full bridge structure and unidirectional current that module b is then made up of four IGBT with anti-paralleled diode
Hold composition.AC/DC changers are connected with DC/AC changers by DC side, and DC side two ends P, N are drawn can be defeated as direct current
Enter/output port.AC/DC changers are connected with winding b, can provide the compensation that compensation electric current realizes reactive power, and DC/AC becomes
Parallel operation is then connected by LC wave filter with winding a, there is provided voltage compensation.
Fig. 3 is the balance of voltage and loop current suppression control block diagram of MMC in hybrid power electronic transformer.Whole control bag
Include balancing energy control and voltage balance control.Because every group of bridge arm control is relatively independent, said by taking a group bridge arms as an example below
It is bright.First, meansigma methodss u of submodule capacitor voltage in a group bridge arms are calculatedcav, i.e.,：
In formula, uc1i、uc2jRespectively capacitance voltage value in MMC modules a, module b.
Adjust through PI after meansigma methodss are compared with voltage reference value and obtain circulation reference valueTake upper and lower bridge arm
The meansigma methodss of electric current are used as circulation iZa, balancing energy controlled output control signal is obtained after circulation controlWherein circulation
Governing equation is：
In formula, Kp、KiThe respectively ratio of pi regulator, integral coefficient.
Voltage balance control aspect, after submodule capacitor voltage is made comparisons respectively with reference value voltage error amount is obtained
Δ u, after proportional controller again with bridge arm current i of submodule place bridge armax(x=p, n) is multiplied, and obtains electric voltage equalization
The output control signal of controlOutput signal, the output signal of voltage balance control and the submodule that balancing energy is controlled
Block voltage reference signalAddition obtains final control signal, and the output arteries and veins of controlling switch device is obtained after PWM
Rush signal.Wherein, submodule voltage reference signalObtained by following formula：
In formula, X, Y are respectively the quantity of MMC modules a and module b, UdFor DC port voltage, uaoFor AC relative to
Central point output voltage reference value.
Fig. 4 show reactive power compensation control block diagram.Reactive power compensation adopts phase splitting compensation.Collection flow through it is secondary around
Phase voltage u of group a windingsx(x=a, b, c) and phase current ix(x=a, b, c).With uxOn the basis of, respectively to uxPhase angle increase
120 °, 240 °, then Park conversion is carried out to it, the u under two-phase rotating coordinate system is transformed to by three-phase static coordinate systemd、uq。
Electric current i is obtained in the same mannerd、iq, then calculate active-power P further according to instantaneous power theoryrefAnd reactive power Qref, i.e.,：
According to the reactive power Q for calculating acquisitionref, reactive-load compensation coefficient set in advance and side converter itself volume in parallel
Determine compensation capacity restriction, calculate reactive-load compensation electric current Δ iq.Make changer reactive current reference valueInverter output electricity
Stream is controlled using current closed-loop PI, and, through Park inverse transformations, obtaining inverter should under three-phase static coordinate system for the result of output
The control signal of phaseThe control wave that PWM obtains switching device is eventually passed, is realized idle
The compensation of electric current.
Fig. 5 show dynamic electric voltage and recovers control block diagram.By the voltage u on secondary windings aa,b,cPhase is obtained through phaselocked loop
Angle ω t are for abc/dq0 conversion, line voltage ua,b,cThe component u under dq axles is obtained by abc/dq0 conversiond、uq.It is right respectively
Changer and voltage on line side uoa,b,c, changer output current iLa,b,c, flow through the electric current i of electric capacityca,b,cJing abc/dq0 changes are got in return
Component u to it under dq axlesod、uoq、iLd、iLq、icd、icq.When grid collapses are detected, calculating needs the electricity of compensation
Pressure Δ u, is controlled as the reference voltage with Δ u to changer output.Using d axles as reference axis, Δ u makees voltage compensation
For changer d axle reference voltagesInput, be with season q shaft voltage reference valuesThen pass through Voltage loop to control
To current reference signalAs the input of electric current loop.Wherein, the Voltage loop governing equation is：
In formula,Respectively Voltage loop output control signal；ω is electrical network angular frequency；C1For LC filter capacities
Value；uod、uoqFor component of the capacitance voltage under dq axles；Kp1、Ki1The respectively ratio of pi regulator, integral coefficient；Offset voltage reference value is exported for changer；icd、icqFor flow through LC filter capacities electric current under dq axles point
Amount.
Voltage control loop input results obtain the reference control signal under dq axles through current loop control, wherein, the electricity
Flowing ring governing equation is：
In formula,For electric current loop output control signal；ω is electrical network angular frequency；L1For changer output LC filtering
Device inductance value；icd、icqTo flow through component of the LC filter capacities electric current under dq axles；Kp2、Ki2The respectively ratio of pi regulator
Example, integral coefficient；Respectively Voltage loop output control signal.
Eventually pass abc/dq0 inverse transformations and obtain three-phase and refer to control signal, through PWM the control of switching device is obtained
Pulse signal processed, realizes the function of dynamic voltage compensation.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned embodiment
Detail, the present invention range of the technology design in, various equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (8)
1. a kind of multiport hybrid power electronic transformer based on MMC, including multiwinding transformer, mixed type MMC conversion
Device, LC wave filter and direct current output port, it is characterised in that：Described multiwinding transformer includes armature winding, secondary windings a
With secondary windings b；Armature winding is connected with electrical network, and the winding in each phases of secondary windings a is directly connected with load, secondary windings
B is connected with mixed type MMC changer, and winding a is accessed Jing after LC wave filter.
2. a kind of multiport hybrid power electronic transformer based on MMC according to claim 1, it is characterised in that：
Described multiwinding transformer is three-phase transformer.
3. a kind of multiport hybrid power electronic transformer based on MMC according to claim 1, it is characterised in that：
Described mixed type MMC changer is three-phase back to back structure, and mixed type MMC changer includes that AC/DC changers and DC/AC become
Parallel operation.
4. a kind of multiport hybrid power electronic transformer based on MMC according to claim 3, it is characterised in that：
Described AC/DC changers and DC/AC changers is mixed type MMC structure, MMC knots in AC/DC changers and DC/AC changers
Upper and lower each bridge arm of structure at least includes that 1 module a, 2 modules b and 1 inductance are in series, and upper and lower two bridge arms constitute 1
Group.
5. a kind of multiport hybrid power electronic transformer based on MMC according to claim 4, it is characterised in that：
The half-bridge structure and DC capacitor that described module a is made up of two IGBT with anti-paralleled diode is constituted.
6. a kind of multiport hybrid power electronic transformer based on MMC according to claim 4, it is characterised in that：
The full bridge structure and DC capacitor that described module b is made up of four IGBT with anti-paralleled diode is constituted.
7. a kind of multiport hybrid power electronic transformer based on MMC according to claim 3, it is characterised in that：
Described AC/DC changers are connected with DC/AC changers by DC side, and DC side is drawn can be used as direct current input/output
Port；AC/DC changers are connected by LC wave filter with winding b, and DC/AC changers are then connected by LC wave filter with winding a.
8. the control method of a kind of multiport hybrid power electronic transformer based on MMC according to claim 1, its
It is characterised by：Described control method includes the control of the balance of voltage and loop current suppression, reactive power compensation control and the dynamic of MMC
Voltage recovers control；
The balance of voltage of described MMC and loop current suppression control include that balancing energy is controlled and voltage balance control, by control
Active power, maintain DC-side Voltage Stabilization, it is ensured that changer can normal work, balancing energy control control input to convert
The distribution of device active power, while realizing the suppression to circulation；Voltage balance control by capacitance voltage in control submodule with
Track its reference value, adjusts the active power of submodule, with the balanced control of the capacitance voltage for realizing each group of upper and lower bridge arm Neutron module
System；
The reactive power compensation control is realized by mixed type MMC structure AC/DC changer, including compensation Current calculation and electricity
Stream closed loop control, based on the independence of topology, using phase splitting compensation control, first gathers phase voltage, phase current and is closed
Abc/dq0 conversion is carried out into after, further according to instantaneous power theory active-power P is calculatedrefAnd reactive power Qref, i.e.,：
In formula, ud、uq, id、iqThe respectively component of phase voltage, phase current in dq coordinate systems；
Subsequently, according to reactive-load compensation coefficient set in advance, reactive-load compensation electric current is calculated, as the reference of output compensation electric current
Value, by closed-loop current control control signal is obtained, and eventually passes the switching signal that PWM generates power device；
The dynamic electric voltage is recovered control and is realized by mixed type MMC structure DC/AC changer, including voltage detecting and compensation electricity
Pressure is calculated and voltage x current double -loop control, then obtains control signal by voltage x current double -loop control, is given birth to finally by PWM
The switching signal of power devices, wherein
The Voltage loop governing equation is：
In formula,Respectively Voltage loop output control signal；ω is electrical network angular frequency；C1For LC filter capacitances；
uod、uoqFor component of the capacitance voltage under dq axles；Kp1、Ki1The respectively ratio of pi regulator, integral coefficient；For
Changer exports offset voltage reference value；icd、icqTo flow through component of the LC filter capacities electric current under dq axles；
The current loop control equation is：
In formula,For electric current loop output control signal；ω is electrical network angular frequency；L1For changer output LC wave filter electricity
Inductance value；icd、icqTo flow through component of the LC filter capacities electric current under dq axles；Kp2、Ki2The respectively ratio of pi regulator, product
Divide coefficient；Respectively Voltage loop output control signal.
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Cited By (12)
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| CN107154630A (en) * | 2017-07-05 | 2017-09-12 | 国家电网公司 | A kind of hybrid power electrical substation |
| CN107565568A (en) * | 2017-08-28 | 2018-01-09 | 东南大学 | Hybrid power electronic transformer and control method based on single star-like MMC structures |
| CN107565580A (en) * | 2017-09-06 | 2018-01-09 | 东南大学 | Hybrid power electronic transformer and control method with fault tolerance |
| CN107579666A (en) * | 2017-08-28 | 2018-01-12 | 东南大学 | Multi-functional hybrid power electronic transformer and control method based on MMC matrix converters |
| CN107611992A (en) * | 2017-11-10 | 2018-01-19 | 贵州电网有限责任公司电力科学研究院 | A kind of three phase separation formula hybrid power electronic transformer and its control method |
| CN107732931A (en) * | 2017-11-10 | 2018-02-23 | 贵州电网有限责任公司电力科学研究院 | A kind of hybrid power electronic transformer and its modulator approach based on three-phase matrixing |
| CN108183486A (en) * | 2018-01-17 | 2018-06-19 | 中国科学院电工研究所 | A kind of flexibility multimode switch and its control method |
| CN110707699A (en) * | 2019-11-06 | 2020-01-17 | 西安交通大学 | Modular multi-level hybrid distribution transformer |
| CN110868082A (en) * | 2019-11-29 | 2020-03-06 | 上海电力大学 | MMC-PET control method for supplying power to passive network based on power grid voltage fault |
| CN111953017A (en) * | 2020-07-29 | 2020-11-17 | 合肥工业大学 | Grid-connected inverter state equation set modeling method considering delay link |
| CN111952993A (en) * | 2020-07-30 | 2020-11-17 | 国网智能科技股份有限公司 | Modular cascade power electronic transformer balance control system and method |
| CN112736932A (en) * | 2020-12-29 | 2021-04-30 | 中国电建集团中南勘测设计研究院有限公司 | Reactive power optimization compensation device for offshore wind plant and control method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427425A (en) * | 2013-08-22 | 2013-12-04 | 华北电力大学 | Coordinated control device and method for MMC (modular multilevel converter) type unified power quality conditioner |
| CN103501012A (en) * | 2013-10-21 | 2014-01-08 | 华北电力大学 | Parallel side compensation optimal-allocation control device and method for MMC (modular multilevel converter (MMC) type UPQC (unified power quality conditioner) |
| CN104410256A (en) * | 2014-12-10 | 2015-03-11 | 湖南大学 | Active filter system containing modular multilevel converter and control method thereof |
| CN104753359A (en) * | 2015-01-04 | 2015-07-01 | 河海大学 | Novel power frequency power electronic transformer and implementation method thereof |
| CN104767212A (en) * | 2015-02-13 | 2015-07-08 | 国家电网公司 | Hybrid power electronic transformer |
| CN104934989A (en) * | 2015-07-09 | 2015-09-23 | 哈尔滨理工大学 | Reactive power compensation device based on novel modular multilevel topology and control method thereof |
| CN105826924A (en) * | 2016-03-22 | 2016-08-03 | 中电普瑞科技有限公司 | Series-parallel combined compensator and method of restraining high voltage direct current (HVDC) commutation failure |
| CN106099948A (en) * | 2016-08-30 | 2016-11-09 | 国网河南省电力公司电力科学研究院 | A kind of power electronics is flexible coupling switch topology and control method thereof |
| CN106452136A (en) * | 2016-06-20 | 2017-02-22 | 清华大学 | Multi-port power electronic converter for energy internet |
| CN106451466A (en) * | 2016-11-01 | 2017-02-22 | 辽宁工程技术大学 | Grid power quality control system and method based on unified power quality conditioner |
| CN207010553U (en) * | 2017-03-09 | 2018-02-13 | 贵州电网有限责任公司电力科学研究院 | A kind of multiport hybrid power electronic transformer based on MMC |
-
2017
- 2017-03-10 CN CN201710139460.6A patent/CN106655805A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427425A (en) * | 2013-08-22 | 2013-12-04 | 华北电力大学 | Coordinated control device and method for MMC (modular multilevel converter) type unified power quality conditioner |
| CN103501012A (en) * | 2013-10-21 | 2014-01-08 | 华北电力大学 | Parallel side compensation optimal-allocation control device and method for MMC (modular multilevel converter (MMC) type UPQC (unified power quality conditioner) |
| CN104410256A (en) * | 2014-12-10 | 2015-03-11 | 湖南大学 | Active filter system containing modular multilevel converter and control method thereof |
| CN104753359A (en) * | 2015-01-04 | 2015-07-01 | 河海大学 | Novel power frequency power electronic transformer and implementation method thereof |
| CN104767212A (en) * | 2015-02-13 | 2015-07-08 | 国家电网公司 | Hybrid power electronic transformer |
| CN104934989A (en) * | 2015-07-09 | 2015-09-23 | 哈尔滨理工大学 | Reactive power compensation device based on novel modular multilevel topology and control method thereof |
| CN105826924A (en) * | 2016-03-22 | 2016-08-03 | 中电普瑞科技有限公司 | Series-parallel combined compensator and method of restraining high voltage direct current (HVDC) commutation failure |
| CN106452136A (en) * | 2016-06-20 | 2017-02-22 | 清华大学 | Multi-port power electronic converter for energy internet |
| CN106099948A (en) * | 2016-08-30 | 2016-11-09 | 国网河南省电力公司电力科学研究院 | A kind of power electronics is flexible coupling switch topology and control method thereof |
| CN106451466A (en) * | 2016-11-01 | 2017-02-22 | 辽宁工程技术大学 | Grid power quality control system and method based on unified power quality conditioner |
| CN207010553U (en) * | 2017-03-09 | 2018-02-13 | 贵州电网有限责任公司电力科学研究院 | A kind of multiport hybrid power electronic transformer based on MMC |
Non-Patent Citations (2)
| Title |
|---|
| 王宝安等: ""模块化多电平动态电压补偿器的控制策略研究"" * |
| 费骏韬等: ""MMC-UPFC 交叉解耦控制策略研究综述"" * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154630A (en) * | 2017-07-05 | 2017-09-12 | 国家电网公司 | A kind of hybrid power electrical substation |
| CN107579666B (en) * | 2017-08-28 | 2021-02-26 | 东南大学 | Multifunctional hybrid power electronic transformer based on MMC matrix converter and control method |
| CN107565568A (en) * | 2017-08-28 | 2018-01-09 | 东南大学 | Hybrid power electronic transformer and control method based on single star-like MMC structures |
| CN107579666A (en) * | 2017-08-28 | 2018-01-12 | 东南大学 | Multi-functional hybrid power electronic transformer and control method based on MMC matrix converters |
| CN107565580A (en) * | 2017-09-06 | 2018-01-09 | 东南大学 | Hybrid power electronic transformer and control method with fault tolerance |
| CN107611992A (en) * | 2017-11-10 | 2018-01-19 | 贵州电网有限责任公司电力科学研究院 | A kind of three phase separation formula hybrid power electronic transformer and its control method |
| CN107732931A (en) * | 2017-11-10 | 2018-02-23 | 贵州电网有限责任公司电力科学研究院 | A kind of hybrid power electronic transformer and its modulator approach based on three-phase matrixing |
| CN107732931B (en) * | 2017-11-10 | 2023-11-10 | 贵州电网有限责任公司电力科学研究院 | Hybrid power electronic transformer based on three-phase matrix transformation and modulation method thereof |
| CN108183486B (en) * | 2018-01-17 | 2020-08-21 | 中国科学院电工研究所 | Flexible multi-state switch and control method thereof |
| CN108183486A (en) * | 2018-01-17 | 2018-06-19 | 中国科学院电工研究所 | A kind of flexibility multimode switch and its control method |
| CN110707699B (en) * | 2019-11-06 | 2021-05-28 | 西安交通大学 | Modular multi-level hybrid distribution transformer |
| CN110707699A (en) * | 2019-11-06 | 2020-01-17 | 西安交通大学 | Modular multi-level hybrid distribution transformer |
| CN110868082A (en) * | 2019-11-29 | 2020-03-06 | 上海电力大学 | MMC-PET control method for supplying power to passive network based on power grid voltage fault |
| CN110868082B (en) * | 2019-11-29 | 2021-10-08 | 上海电力大学 | MMC-PET control method for supplying power to passive network based on power grid voltage fault |
| CN111953017A (en) * | 2020-07-29 | 2020-11-17 | 合肥工业大学 | Grid-connected inverter state equation set modeling method considering delay link |
| CN111953017B (en) * | 2020-07-29 | 2021-11-05 | 合肥工业大学 | Grid-connected inverter state equation set modeling method considering delay link |
| CN111952993A (en) * | 2020-07-30 | 2020-11-17 | 国网智能科技股份有限公司 | Modular cascade power electronic transformer balance control system and method |
| CN112736932A (en) * | 2020-12-29 | 2021-04-30 | 中国电建集团中南勘测设计研究院有限公司 | Reactive power optimization compensation device for offshore wind plant and control method thereof |
| CN112736932B (en) * | 2020-12-29 | 2022-06-10 | 中国电建集团中南勘测设计研究院有限公司 | Reactive power optimization compensation device for offshore wind plant and control method thereof |
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