CN106602914A - Modular multilevel converter control simplification method based on two-level SVPWM method - Google Patents
Modular multilevel converter control simplification method based on two-level SVPWM method Download PDFInfo
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
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Abstract
The invention discloses a modular multilevel converter control simplification method based on a two-level SVPWM method. A single-module modular multilevel converter is equivalent to an upper bridge arm three-phase half bridge and a lower bridge arm three-phase half bridge, which are connected in series; SVPWM of the modular multilevel converter is simplified into combination of 2D-SVPWM and carrier phase-shifting modulation; by reasonably arranging a 2D-SVPWM generation module in the control system, and after effectively limiting output signals of an energy balance control link and a capacitor voltage balancing control link, modulation work can be finished. The method adopts the two-level SVPWM method instead of a multi-level SVPWM method, thereby preventing a complex voltage vector space diagram; and the algorithm is simple, high in universality, good in control effect, low in switching loss, high in DC voltage utilization rate, suitable for any level and can be widely applied and popularized in the MMC control field.
Description
Technical field
The invention belongs to electric and electronic technical field, more particularly to a kind of module based on two level SVPWM modulator approaches
Change the control method for simplifying of multilevel converter.
Background technology
Relatively conventional UHV AC transmission technique, HVDC Transmission Technology have that transmission capacity is big, power transmission distance, line loss
The advantages of low, construction investment is saved, corridor utilization rate is high, the method for operation is flexible, so that extra-high voltage direct-current transmission engineering is in state
Extensive concern and development have been obtained inside.In HVDC Transmission Technology, the flexibility using insulated gate bipolar transistor IGBT is straight
Stream technology of transmission of electricity need not be substantial amounts of idle, can be had broad application prospects in field of power transmission with effectively save cost and space,
But due to being limited by IGBT power so that flexible DC power transmission engineering is difficult to high capacity transmission, to a certain degree
On limit the development of the technology.With the continuous progress of science and technology, it is inevitable trend to improve IGBT power, flexible direct current
Technology of transmission of electricity will replace traditional HVDC Transmission Technology, become following main power transmission mode.Modularization multi-level converter
Used as an of paramount importance ring in Technology of HVDC based Voltage Source Converter, it will be also following research emphasis now to be.
Space vector pulse width modulation (Space Vector Pulse Width Modulation, SVPWM) is by which
The advantage that switching loss is low, waveform quality is good, DC voltage utilization rate is high, is widely used in the control of converters
Field, is concentrated mainly on two level and three level, it is difficult to be applied to higher level, and reason is the increase with level number,
Voltage vector space diagram can become sufficiently complex, be difficult digitized reality.Therefore, in modularization multi-level converter (Modular
Multilevel converter, MMC) control field it is also fewer with regard to the research of SVPWM technologies.Divided based on above-mentioned
Analysis, if the simplified SVPWM technologies of MMC control fields can be obtained, that will make full use of the excellent of SVPWM technologies and MMC structures
Point, is widely applied in flexible DC power transmission, high-pressure frequency-conversion or even power electronics inverter every field, will be one very
Significant research topic.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of based on two level SVPWM modulator approaches
Modularization multi-level converter control simplifies algorithm, and the SVPWM method of modularization multi-level converter is simplified by the algorithm
Into the combination of two level SVPWM modulator approaches and phase-shifting carrier wave modulator approach, algorithm is simple, highly versatile, and is applied to any
Level.
Above-mentioned technical purpose is realized, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：
A kind of control method for simplifying of the modularization multi-level converter based on two level SVPWM modulator approaches, including with
Lower step：
Step one, by it is the single module of modularization multi-level converter equivalent into series connection upper bridge arm three-phase half-bridge and lower bridge arm
Three-phase half-bridge；
Step 2, the foundation SVPWM Controlling model equivalent with the SPWM Controlling models of modularization multi-level converter；Its
In, SPWM Controlling models include：Reference voltage control module, balancing energy control module, 2N capacitor voltage equalizing control module and
For output drive signal to modularization multi-level converter 2N phase-shifted SPWM modulation module, SVPWM control
Phase-shifted SPWM modulation module in SPWM Controlling models is substituted for phase-shifting carrier wave 2D-SVPWM modulation module, carrier wave by model
Phase shift 2D-SVPWM modulation modules include phase-shifting carrier wave modulation module and 2D-SVPWM generation modules, and phase-shifting carrier wave 2D-SVPWM is adjusted
The output signal value of molding block is restricted in the range of [- 1,1], and N is the quantity of single module in modularization multi-level converter.
Step 3, the quantity of 2D-SVPWM generation modules is simplified to 2, and each 2D-SVPWM generation modules are moved to
Between balancing energy control module and capacitor voltage equalizing control module, while the output signal value of capacitor voltage equalizing control module is limited
To in the range of [- 1,1], and phase-shifting carrier wave 2D-SVPWM modulation module is substituted for into phase-shifted SPWM modulation module；
Step 4, the quantity of 2D-SVPWM generation modules is simplified to 1, and 2D-SVPWM generation modules are advanced to into original
After reference voltage control module, 2D-SVPWM generation modules are examined voltage control module with Radix Scrophulariae and are collectively forming new reference voltage control
Molding block, in new reference voltage control module, Radix Scrophulariae is examined output after the output signal of voltage control module is negated and arrives 2D-
SVPWM generation modules；Simultaneously the output signal value of balancing energy control module and capacitor voltage equalizing control module is restricted to [- 1,
1] in the range of, the final control for realizing the modularization multi-level converter based on two level SVPWM modulator approaches.
Preferably, the reference voltage control module in the step 2 includes outer voltage and current inner loop, reference voltage
The course of work of control module is comprised the following steps：Ensure that dc bus lateral capacitance stagnation pressure is constant using outer voltage, using electricity
Stream internal ring track reference electric current, outer voltage and current inner loop cooperatively form double -loop control；The reference voltage control module is defeated
Go out two paths of signals, be respectively used to control bridge arm three-phase half-bridge and lower bridge arm three-phase half-bridge, and energy after wherein signal is negated all the way
Amount equalization control module carries out computing, and another road signal directly carries out computing with balancing energy control module.
Preferably, the outer voltage and voltage inter-loop are respectively adopted proportional and integral controller,.
Preferably, the course of work of the balancing energy control module is comprised the following steps：By the modular multilevel change of current
The single module capacitance voltage desired value of device make the difference with all single module capacitance voltage meansigma methodss after through proportional and integral controller, obtain
To the desired value of bridge arm circulation；The meansigma methodss of upper and lower bridge arm current are taken as actual rings flow valuve；By the desired value of bridge arm circulation with
Actual rings flow valuve makees after the recovery through proportional and integral controller, obtains the output signal of balancing energy control module.
Preferably, the course of work of the capacitor voltage equalizing control module is comprised the following steps：By the modular multilevel change of current
Device single module capacitance voltage desired value makees after the recovery after proportional controller with single module capacitance voltage actual value, is multiplied by ratio system
Number, you can obtain the output signal of single module capacitor voltage equalizing control module.
Preferably, the course of work of the phase-shifted SPWM modulation module is comprised the following steps：By modular multilevel
Inverter single module reference voltage is compared with the high frequency triangular carrier of phase fixed angle, produces drive signal.
Preferably, the course of work of the 2D-SVPWM generation modules is comprised the following steps：By reference voltage control module
Output voltage by space vector pulse width modulation module SVPWM, produce reference voltage signal, on reference voltage signal, be superimposed energy
Amount equalization control module output signal and capacitor voltage equalizing control module output signal, obtain single module reference voltage, and and triangle
Carrier wave ratio is compared with so as to generating drive signal.
Preferably, in the step 4, new reference voltage control module exports signal all the way, and balancing energy control module is defeated
Go out two paths of signals, the output signal of new reference voltage control module directly with balancing energy control module wherein signal enters all the way
Row computing, another road signal of balancing energy control module are transported with the output signal of new reference voltage control module after negating
Calculate.
Beneficial effects of the present invention：
1. the SVPWM method of modularization multi-level converter is simplified to two level SVPWM modulator approaches by the present invention
With the combination of phase-shifting carrier wave modulator approach.
2. the present invention can effectively improve DC voltage utilization rate, optimize the quality of output waveform.
3. the present invention realizes that process is simple, it is easy to accomplish, and it is applied to any level, highly versatile can be in MMC controls
Field is widely used and promotes.
Description of the drawings
Fig. 1 be the present invention a kind of embodiment in single module MMC topological structure；
Fig. 2 is traditional modular multilevel converter SPWM control methods；
Fig. 3 is the equivalent SVPWM control method of Modular multilevel converter that step of the present invention (1) is obtained；
Fig. 4 is that the Modular multilevel converter that step of the present invention (2) is obtained simplifies SVPWM control method；
Fig. 5 is the simplified SVPWM control method of the final Modular multilevel converter for obtaining of the invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to only to explain the present invention
Limit the present invention.
Below in conjunction with the accompanying drawings the application principle of the present invention is explained in detail.
Fig. 1 is the topological structure of single module MMC in an embodiment of the present invention, V in figurepa1And Vpa2Represent single module MMC
A phases on bridge arm power device, Vna1And Vna2Represent the power device of bridge arm under a phases of single module MMC；Vpb1And Vpb2Represent
The power device of bridge arm, V in the b phases of single module MMCnb1And Vnb2Represent the power device of bridge arm under the b phases of single module MMC；Vpc1
And Vpc2Represent the power device of bridge arm in the c phases of single module MMC, Vnc1And Vnc2Represent the work(of bridge arm under the c phases of single module MMC
Rate device.
A kind of control method for simplifying of the modularization multi-level converter based on two level SVPWM modulator approaches, including with
Lower step：
Step one, by it is the single module of modularization multi-level converter equivalent into series connection upper bridge arm three-phase half-bridge and lower bridge arm
Three-phase half-bridge；
As shown in phantom in Figure 1, when by the three-phase of single module MMC each single module of bridge arm electric capacity both positive and negative polarity difference phase
Connect, then constitute a upper bridge arm three-phase half-bridge；In the same manner, when by each single module electric capacity both positive and negative polarity difference of bridge arm under three-phase
It is connected with each other, also constitutes a lower bridge arm three-phase half-bridge.Therefore, it can regard upper bridge arm three-phase half as by single module MMC equivalent
The series connection of bridge and lower bridge arm three-phase half-bridge.
Step 2, the foundation SVPWM Controlling model equivalent with the SPWM Controlling models of modularization multi-level converter；As schemed
Shown in 2, SPWM Controlling models include：Reference voltage control module, balancing energy control module, 2N capacitor voltage equalizing control module
With for output drive signal to modularization multi-level converter 2N phase-shifted SPWM modulation module, phase-shifted SPWM
Modulation includes phase-shifting carrier wave modulation module and SPWM modulation modules；As shown in figure 3, SVPWM Controlling models are by SPWM Controlling models
In phase-shifted SPWM modulation module be substituted for phase-shifting carrier wave 2D-SVPWM modulation module, i.e., using two level space vector arteries and veins
Wide modulator approach (SVPWM) replaces sinusoidal pulse width modulation method (SPWM), phase-shifting carrier wave 2D-SVPWM modulation module to include carrier wave
Phase shift modulation module and 2D-SVPWM generation modules, quantity of the N for single module in modularization multi-level converter, the electricity of single module
Line structure is as shown in figure 1, including upper and lower two three-phase half-bridges；
Traditional SPWM Controlling models of the modularization multi-level converter in Fig. 2 are carried out with reference to the single module MMC in Fig. 1
Description；U in figuredcIt is DC bus-bar voltage desired value, IRefIt is reference current value.Traditional SPWM Controlling models are broadly divided into four
Individual part：Reference voltage control, balancing energy control, voltage Pressure and Control and phase-shifting carrier wave modulation.Wherein, reference voltage control
It is mainly used in controlling desired output voltage, including outer voltage module and current inner loop module, outer voltage module is used to protect
Card dc bus lateral capacitance stagnation pressure is constant, and current inner loop module is used for track reference electric current, it is preferable that outer voltage module and electricity
The equal adoption rate integral controller of stream inner loop module, the reference voltage control module export two paths of signals, are respectively used to control
Upper bridge arm three-phase half-bridge and lower bridge arm three-phase half-bridge, and wherein signal negates rear balancing energy control module and carries out computing all the way,
Another road signal directly carries out computing with balancing energy control module；Balancing energy control main purpose is to ensure modularity
The three-phase bridge arm of multilevel converter divides gross energy equally, i.e., so that each phase bridge arm direct current stagnation pressure is identical；Capacitor voltage equalizing control is main
Purpose is the energy by redistributing single module in bridge arm so that the capacitance voltage of each single module remains constant；And carrier wave is moved
The modulating wave that mutually modulation is obtained using different modulating means in mainly using each single module (generates mould using 2D-SVPWM
The modulating wave that block is produced), the triangular carrier obtained from different phase-moving methods is compared, so as to the switch for producing power device drives
Dynamic signal.Further, aforesaid phase-moving method is：When N is odd number, the phase by pi of upper and lower bridge arm modulating wave is upper and lower
The phase place of bridge arm correspondence single module carrier wave is identical, 2 π of the phase/N of adjacent single module carrier wave；When N is even number, upper and lower bridge
The phase by pi of arm modulating wave, the phase by pi/N of upper and lower bridge arm correspondence single module carrier wave, the phase place of adjacent single module carrier wave
Differ 2 π/N.
As shown in Figure 3, Uw1pxRepresent the modulated signal of x-th single module of bridge arm on MMC, Uw1nxRepresent bridge arm the under MMC
The modulated signal of x single module, 0≤x≤N., and modularization multi-level converter is in series by N number of single module
Step 3, in view of capacitor voltage equalizing controlling unit before, the modulating wave of all single modules of upper and lower bridge arm is shared respectively
The output signal of respective balancing energy controlling unit, as shown in figure 4, the quantity of 2D-SVPWM generation modules is simplified to into 2, and
Each 2D-SVPWM generation modules are moved between balancing energy control module and capacitor voltage equalizing control module, while electric capacity is equal
The output signal value of pressure control module is restricted in the range of [- 1,1] so that the output signal of balancing energy control module is divided first
Not through each 2D-SVPWM generation modules, 2D-SVPWM generation modules and corresponding capacitor voltage equalizing control module are defeated after computing
Go out to phase-shifted SPWM modulation module, as seen from Figure 4, Uw2pRepresent the shared control letter of all single modules of bridge arm on MMC
Number, Uw2nRepresent the shared control signals of all single modules of bridge arm under MMC；
Step 4, in view of balancing energy controlling unit before, the modulating wave of all single modules of upper and lower bridge arm shares reference
The output signal of voltage control loop section, as shown in figure 5, the quantity of 2D-SVPWM generation modules is simplified to 1, and by 2D-
SVPWM generation modules are advanced to after Radix Scrophulariae examines voltage control module, 2D-SVPWM generation modules and former reference voltage control mould
Block is collectively forming new reference voltage control module, and in new reference voltage control module, Radix Scrophulariae examines the output letter of voltage control module
After number negating, output is to 2D-SVPWM generation modules；Simultaneously by the output of balancing energy control module and capacitor voltage equalizing control module
Signal value is restricted in the range of [- 1,1], and the output of new reference voltage control module and balancing energy control module is through plus-minus fortune
Plus and minus calculation is done with the output signal of corresponding capacitor voltage equalizing control module respectively after calculation, final output signal is to phase-shifting carrier wave
SPWM modulation modules (generate the final modulating wave of each module), by each phase-shifted SPWM modulation module by aforesaid modulating wave
It is compared with the triangular carrier of out of phase, the switching drive signal of all power devices of final output is to modular multilevel
Inverter, realizes the control of the modularization multi-level converter based on two level SVPWM modulator approaches, in Fig. 5, Uw3nRepresent MMC
The output signal of reference voltage controlling unit.The output signal of the new reference voltage control module directly with balancing energy control
Module wherein signal carries out computing all the way, another road signal of balancing energy control module is controlled with new reference voltage after negating
The output signal of module carries out computing.
In an embodiment of the present invention, the course of work of the reference voltage control module is comprised the following steps：Electricity
The double -loop control of pressure outer shroud and current inner loop, voltage inter-loop adoption rate integral controller, current inner loop adoption rate integration are adjusted
Section device.
Preferably, the course of work of the balancing energy control module is comprised the following steps：By the modular multilevel change of current
The single module capacitance voltage desired value of device make the difference with all single module capacitance voltage meansigma methodss after through proportional and integral controller, obtain
To the desired value of bridge arm circulation；The meansigma methodss of upper and lower bridge arm current are taken as actual rings flow valuve；By the desired value and reality of circulation
Circulation value makees after the recovery through proportional and integral controller, obtains the output signal of balancing energy control module.
Preferably, the course of work of the capacitor voltage equalizing control module is comprised the following steps：By the modular multilevel change of current
Device single module capacitance voltage desired value makees after the recovery after proportional controller with single module capacitance voltage actual value, is multiplied by ratio system
Number, you can obtain the output signal of single module capacitor voltage equalizing control module.
Preferably, the course of work of the phase-shifted SPWM modulation module is comprised the following steps：By modular multilevel
Inverter single module reference voltage is compared with the high frequency triangular carrier of phase fixed angle, produces drive signal.
Preferably, the course of work of the 2D-SVPWM generation modules is comprised the following steps：By the modular multilevel change of current
Device Radix Scrophulariae examines the output voltage of voltage control module by space vector pulse width modulation module, produces new reference voltage signal, newly
On reference voltage signal, stack power equalization control module output signal and capacitor voltage equalizing control module output signal, obtain single mode
Block reference voltage, and compare with triangular carrier so as to generate drive signal.
The control process of simplified algorithm of the present invention is：By modularization multi-level converter direct voltage reference value UdcWith it is defeated
Go out current reference value IRef, by reference to voltage control module, obtain reference voltage signal；After reference voltage signal is negated, lead to
2DSVPWM modules are crossed, reference voltage signal after being modulated；The balanced control of stack power is distinguished on the modulation reference voltage signal
Module output signal processed and capacitor voltage equalizing control module output signal, are obtained the corresponding reference voltage level of each single module；Should
Reference voltage level is compared with the triangular carrier of out of phase respectively, you can obtain the drive signal of power device.Relative to existing
It is for technology, of the invention by the modularization multi-level converter equivalent string for regarding upper bridge arm three-phase half-bridge and lower bridge arm three-phase half-bridge as
After connection, Rational Simplification Controlling model instead of three level SVPWM modules with two level SVPWM modules, and control algolithm is able to into one
Step simplifies, with popularization, using value.
The ultimate principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (8)
1. a kind of control method for simplifying of the modularization multi-level converter based on two level SVPWM modulator approaches, its feature exist
In comprising the following steps：
Step one, by it is the single module of modularization multi-level converter equivalent into series connection upper bridge arm three-phase half-bridge and lower bridge arm three-phase
Half-bridge；
Step 2, the foundation SVPWM Controlling model equivalent with the SPWM Controlling models of modularization multi-level converter；Wherein,
SPWM Controlling models include：Reference voltage control module, balancing energy control module, 2N capacitor voltage equalizing control module and it is used for
2N phase-shifted SPWM modulation module of the output drive signal to modularization multi-level converter, the SVPWM Controlling models
Phase-shifted SPWM modulation module in SPWM Controlling models is substituted for into phase-shifting carrier wave 2D-SVPWM modulation module, phase-shifting carrier wave
2D-SVPWM modulation modules include phase-shifting carrier wave modulation module and 2D-SVPWM generation modules, phase-shifting carrier wave 2D-SVPWM modulation mould
The output signal value of block is restricted in the range of [- 1,1], and N is the quantity of single module in modularization multi-level converter；
Step 3, the quantity of 2D-SVPWM generation modules is simplified to 2, and each 2D-SVPWM generation modules are moved to into energy
Between equalization control module and capacitor voltage equalizing control module, while the output signal value of capacitor voltage equalizing control module is restricted to [-
1,1] in the range of, and phase-shifting carrier wave 2D-SVPWM modulation module is substituted for into phase-shifted SPWM modulation module；
Step 4, the quantity of 2D-SVPWM generation modules is simplified to 1, and 2D-SVPWM generation modules is advanced to Radix Scrophulariae examine
After voltage control module, 2D-SVPWM generation modules are examined voltage control module with Radix Scrophulariae and are collectively forming new reference voltage control mould
Block, in new reference voltage control module, Radix Scrophulariae is examined output after the output signal of voltage control module is negated and is given birth to 2D-SVPWM
Into module；The output signal value of balancing energy control module and capacitor voltage equalizing control module is restricted to into [- 1,1] scope simultaneously
It is interior, the final control for realizing the modularization multi-level converter based on two level SVPWM modulator approaches.
2. the control of a kind of modularization multi-level converter based on two level SVPWM modulator approaches according to claim 1
Method for simplifying processed, it is characterised in that：Reference voltage control module in the step 2 includes outer voltage and current inner loop, ginseng
The course of work for examining voltage control module is comprised the following steps：Ensure that dc bus lateral capacitance stagnation pressure is constant using outer voltage,
Using current inner loop track reference electric current, outer voltage and current inner loop cooperatively form double -loop control；The reference voltage control
Module exports two paths of signals, is respectively used to control bridge arm three-phase half-bridge and lower bridge arm three-phase half-bridge, and wherein signal takes all the way
After anti-, balancing energy control module carries out computing, and another road signal directly carries out computing with balancing energy control module.
3. the control of a kind of modularization multi-level converter based on two level SVPWM modulator approaches according to claim 2
Method for simplifying processed, it is characterised in that：The outer voltage and voltage inter-loop are respectively adopted proportional and integral controller,.
4. the control of a kind of modularization multi-level converter based on two level SVPWM modulator approaches according to claim 1
Method for simplifying processed, it is characterised in that：The course of work of the balancing energy control module is comprised the following steps：Will be modularity how electric
The single module capacitance voltage desired value of flat inverter is adjusted through proportional integral after being made the difference with all single module capacitance voltage meansigma methodss
Section device, obtains the desired value of bridge arm circulation；The meansigma methodss of upper and lower bridge arm current are taken as actual rings flow valuve；By bridge arm circulation
Desired value makees after the recovery through proportional and integral controller with actual rings flow valuve, obtains the output signal of balancing energy control module.
5. the control of a kind of modularization multi-level converter based on two level SVPWM modulator approaches according to claim 1
Method for simplifying processed, it is characterised in that：The course of work of the capacitor voltage equalizing control module is comprised the following steps：Will be modularity how electric
Flat inverter single module capacitance voltage desired value makees after the recovery after proportional controller with single module capacitance voltage actual value, is multiplied by
Proportionality coefficient, you can obtain the output signal of single module capacitor voltage equalizing control module.
6. the control of a kind of modularization multi-level converter based on two level SVPWM modulator approaches according to claim 1
Method for simplifying processed, it is characterised in that：The course of work of the phase-shifted SPWM modulation module is comprised the following steps：By modularity
Multilevel converter single module reference voltage is compared with the high frequency triangular carrier of phase fixed angle, produces drive signal.
7. the control of a kind of modularization multi-level converter based on two level SVPWM modulator approaches according to claim 1
Method for simplifying processed, it is characterised in that：The course of work of the 2D-SVPWM generation modules is comprised the following steps：By reference voltage control
The output voltage of molding block produces reference voltage signal, on reference voltage signal by space vector pulse width modulation module SVPWM
Stack power equalization control module output signal and capacitor voltage equalizing control module output signal, obtain single module reference voltage, and
Compare with triangular carrier so as to generate drive signal.
8. the control of a kind of modularization multi-level converter based on two level SVPWM modulator approaches according to claim 1
Method for simplifying processed, it is characterised in that：In the step 4, new reference voltage control module exports signal all the way, balancing energy control
Molding block exports two paths of signals, the output signal of new reference voltage control module directly with balancing energy control module wherein one
Road signal carries out computing, and another road signal of balancing energy control module is believed with the output of new reference voltage control module after negating
Number carry out computing.
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| CN107453641A (en) * | 2017-08-30 | 2017-12-08 | 汪明生 | A kind of two level two-phase space vector pulse width modulation devices and its SVPWM methods |
| CN108667390A (en) * | 2018-05-16 | 2018-10-16 | 西安交通大学 | A kind of full speed range motor drive control method based on MMC |
| CN113595424A (en) * | 2021-08-10 | 2021-11-02 | 东南大学 | Bridge arm multiplexing MMC topological structure |
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| CN107453641A (en) * | 2017-08-30 | 2017-12-08 | 汪明生 | A kind of two level two-phase space vector pulse width modulation devices and its SVPWM methods |
| CN108667390A (en) * | 2018-05-16 | 2018-10-16 | 西安交通大学 | A kind of full speed range motor drive control method based on MMC |
| CN108667390B (en) * | 2018-05-16 | 2020-01-10 | 西安交通大学 | Full-speed-range motor drive control method based on MMC |
| CN113595424A (en) * | 2021-08-10 | 2021-11-02 | 东南大学 | Bridge arm multiplexing MMC topological structure |
| CN113595424B (en) * | 2021-08-10 | 2022-11-01 | 东南大学 | Bridge arm multiplexing MMC topological structure |
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