CN108768191A - A kind of control method that single-phase multi-module cascade solid-state transformer rectification stage is pressed - Google Patents
A kind of control method that single-phase multi-module cascade solid-state transformer rectification stage is pressed Download PDFInfo
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- CN108768191A CN108768191A CN201810749299.9A CN201810749299A CN108768191A CN 108768191 A CN108768191 A CN 108768191A CN 201810749299 A CN201810749299 A CN 201810749299A CN 108768191 A CN108768191 A CN 108768191A
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- 230000009466 transformation Effects 0.000 claims abstract description 29
- 238000010276 construction Methods 0.000 claims abstract description 4
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- 239000011159 matrix material Substances 0.000 claims description 8
- 230000010363 phase shift Effects 0.000 claims description 4
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- 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
- H02M1/0074—Plural converter units whose inputs are connected in series
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Abstract
The invention discloses a kind of control methods that single-phase multi-module cascade solid-state transformer rectification stage is pressed, and include the following steps：The input side of three AC/DC rectifiers is composed in series main circuit, the input side of the main circuit is power-frequency voltage, and the outlet side of each AC/DC rectifiers is DC voltage；Carry out transformation of the two-phase stationary coordinate system to rotating coordinate system, construction virtual current im, the virtual current imDelayed phase actually enter electric current ia90°；To main circuit control using double-closed-loop control after d q transformation, the two close cycles include Voltage loop, electric current loop；The Voltage loop is outer shroud, and the electric current loop is inner ring；Then according to small signal equivalent model, electric current loop is decoupled；The control signal of three AC/DC rectifiers is generated by phase-shifting carrier wave, and three AC/DC rectifiers share a modulation wave signal d, and carrier wave lags 120 ° successively；It keeps the q shaft current ring components of three AC/DC rectifiers equal, adjusts d shaft current ring components, realization is pressed.
Description
Technical field
The present invention relates to a kind of control methods that single-phase multi-module cascade solid-state transformer rectification stage is pressed, and belong to electric power electricity
Subsystem application technical field.
Background technology
As the core equipment of electric system, its major function is voltage class transformation, electric energy biography to traditional power transformer
Defeated and electrical isolation.But there is also some disadvantages for traditional power transformer：Volume weight is big；No-load loss is big；Output end
When band nonlinear load, the harmonic wave for loading generation is transported to input terminal pollution power grid.
Solid-state transformer blank is most proposed that mainly having improves net side electricity earlier than the 1970s by AM General company
Energy quality realizes the decoupling of power grid and load-side；Meet the requirement of intelligent grid；Quality and volume greatly reduce etc. a series of
Advantage.Accordingly, with respect to traditional transformer, solid-state transformer is more suitable for following electric system, has development well
Foreground.
Voltage class needed for equipment applied to electric system is very high, and solid-state transformer is meaned applied to electric system
The power electronic devices needs of solid-state transformer bear very high voltage class, this requirement to power electronic devices is very high, no
Easily realize.Therefore this can be solved the problems, such as using the mode of cascade module.
Although cascade module can solve the problems, such as power electronic devices bear voltage stress it is excessively high this, also have certain
Disadvantage；Such as the unbalanced problem of the unbalanced power of voltage between the module that is faced.Once voltage, power are unbalanced between module
The case where it is excessively serious, may result in entire solid-state transformer and can not work normally, it is therefore desirable to pass through certain control plan
Slightly solve the problems, such as this.
Invention content
It is an object of the invention to solve the problems, such as that solid-state transformer rectification step voltage is unbalanced, a kind of single-phase multimode is proposed
The control method that block cascade solid-state transformer rectification stage is pressed.
The present invention adopts the following technical scheme that：A kind of controlling party that single-phase multi-module cascade solid-state transformer rectification stage is pressed
Method, which is characterized in that include the following steps：
Step SS1：The input side of three AC/DC rectifiers is composed in series main circuit, the input side of the main circuit is
The outlet side of power-frequency voltage, each AC/DC rectifiers is DC voltage；
Step SS2：Carry out transformation of the two-phase stationary coordinate system to rotating coordinate system, construction virtual current im, described virtual
Electric current imDelayed phase actually enter electric current ia90°；
Step SS3：To main circuit control using double-closed-loop control after d q transformation, the two close cycles include Voltage loop,
Electric current loop；The Voltage loop is outer shroud, and the electric current loop is inner ring；Then according to small signal equivalent model, electric current loop is solved
Coupling；
Step SS4：The control signal of three AC/DC rectifiers is generated by phase-shifting carrier wave, and three AC/DC are whole
It flows device and shares a modulation wave signal d, carrier wave lags 120 ° successively；
Step SS5：It keeps the q shaft current ring components of three AC/DC rectifiers equal, adjusts d shaft current ring components,
Realization is pressed.
As a kind of preferred embodiment, the step SS2 is specifically included：Of ac under rest frame is transformed to
DC quantity under rotating coordinate system is controlled according to the method for DC converter；Electric current i will be actually entereda90 ° of lag, obtains
Virtualphase constitutes rest frame two-phase；The phase angle theta of input voltage is obtained by PLL locking phases again, is realized by transformation matrix defeated
Enter transformation of the side electric current from two-phase stationary coordinate system to rotating coordinate system, the transformation matrix is：
θ=ω t
It is described to actually enter electric current iaIt converts to obtain two DC components of d axis and q axis, the reflection of d axis DC components by d q
Active current, q axis DC components reflect reactive current component.
As a kind of preferred embodiment, the step SS3 is specifically included：
Step SS31：The DC voltage of the AC/DC rectifiers outlet side described to three samples, with given value UrefInto
Row compares, and error adjusts to obtain a reference value i of d shaft currents through PI controllersdref；
Step SS32：D shaft currents actual value and a reference value idrefIt being adjusted more afterwards through PI controllers, q axis a reference values are 0,
It is adjusted more afterwards through PI controllers with actual q shaft currents value, the output quantity d after two axis PI controlsd、dqAfter d q inverse transformations
To modulated signal d；
Step SS33：According to the derivation of equivalent small-signal model, d axis, q shaft current inner ring are decoupled.
As a kind of preferred embodiment, three AC/DC rectifiers include rectifier bridge module #1, rectifier bridge module #
2, rectifier bridge module #3.
As a kind of preferred embodiment, the step SS5 further includes：The rectifier bridge module #1's that feedback is obtained
DC voltage is compared with a reference value, then adjusts to obtain the d shaft currents of the rectifier bridge module #1 by PI controllers
The compensation component Δ d of ringd1, with initial d shaft current ring components ddIt is added the d axis electricity after obtaining the rectifier bridge module #1 adjustment
Flow the value d of ringd1, the modulation wave signal d of the rectifier bridge module #1 is obtained using d q inverse transformations1。
As a kind of preferred embodiment, the step SS5 further includes：The rectifier bridge module #2's that feedback is obtained
DC voltage is compared with a reference value, then adjusts to obtain the d shaft currents of the rectifier bridge module #2 by PI controllers
The compensation component Δ d of ringd2, with initial d shaft current ring components ddIt is added the d axis electricity after obtaining the rectifier bridge module #2 adjustment
Flow the value d of ringd2, the modulation wave signal d of the rectifier bridge module #2 is obtained using d q inverse transformations2。
As a kind of preferred embodiment, the step SS5 further includes：The compensation component Δ d of the rectifier bridge module #3d3
The negative value of the sum of compensation component for the rectifier bridge module #1 and rectifier bridge module #2, i.e.,：Δdd3=-Δ dd1-Δ
dd2；
To ensure that total compensation component for 0, obtains the compensation component Δ d of rectifier bridge module #3d3Modulating wave d is generated afterwards3's
Mode is as before, i.e., with initial d shaft current ring components ddIt is added the d axis electricity after obtaining the rectifier bridge module #3 adjustment
Flow the value d of ringd3, the modulation wave signal d of the rectifier bridge module #3 is obtained using d q inverse transformations3；By the rectifier bridge mould
The modulation wave signal d of block #1, the rectifier bridge module #2 and the rectifier bridge module #31、d2、d3, three with 120 ° of phase shift successively
Angle carrier wave relatively obtains the drive signal of control switching device.
As a kind of preferred embodiment, the power-frequency voltage is 220V power-frequency voltages.
As a kind of preferred embodiment, the DC voltage is 130V DC voltages.
The advantageous effect that the present invention is reached：The electric voltage equalization control of DC side not only may be implemented in the control strategy of the present invention
System, can also realize the consistent of input AC side voltage current phase, to achieve the purpose that power factor close to one, solve solid
The unbalanced problem of state transformer rectification step voltage, main circuit are modulated using single-phase d-q vector controlleds and phase-shifting carrier wave, keep q
Shaft current ring the output phase etc. exports d shaft current rings and carries out PI compensation, realizes Pressure and Control.
Description of the drawings
Fig. 1 is the principle schematic of multi-module cascade solid-state transformer rectification stage main circuit.
Fig. 2 is single-phase d-q principle of vector control figure.
Fig. 3 is Pressure and Control schematic diagram.
DC voltage figure when Fig. 4 is laod unbalance.
Fig. 5 is that grading ring section direct current lateral incision is added to carry procedure chart.
Fig. 6 is Pressure and Control static Simulation figure.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
The principle schematic of multi-module cascade solid-state transformer rectification stage main circuit as shown in Fig. 1, the present invention propose
A kind of control method that single-phase multi-module cascade solid-state transformer rectification stage is pressed, includes the following steps：
Step SS1：The input side of three AC/DC rectifiers is composed in series main circuit, the input side of the main circuit is
The outlet side of 220V power-frequency voltages, each AC/DC rectifiers is 130V DC voltages；
Step SS2：Carry out transformation of the two-phase stationary coordinate system to rotating coordinate system, construction virtual current im, described virtual
Electric current imDelayed phase actually enter electric current ia90 °, 90 ° of electric current is actually entered by lag to generate imaginary axis；
Step SS3：To main circuit control using double-closed-loop control after d q transformation, d axis is active current, q axis
For reactive current component, the two close cycles include Voltage loop, electric current loop；The Voltage loop is outer shroud, and the electric current loop is inner ring；
Then according to small signal equivalent model, electric current loop is decoupled；
Step SS4：The control signal of three AC/DC rectifiers is generated by phase-shifting carrier wave, and three AC/DC are whole
It flows device and shares a modulation wave signal d, carrier wave lags 120 ° successively；
Step SS5：It keeps the q shaft current ring components of three AC/DC rectifiers equal, adjusts d shaft current ring components,
Realization is pressed.
As a kind of preferred embodiment, the step SS2 is specifically included：Of ac under rest frame is transformed to
DC quantity under rotating coordinate system is controlled according to the method for DC converter；Electric current i will be actually entereda90 ° of lag, obtains
Virtualphase constitutes rest frame two-phase；The phase angle theta of input voltage is obtained by PLL locking phases again, is realized by transformation matrix defeated
Enter transformation of the side electric current from two-phase stationary coordinate system to rotating coordinate system, the transformation matrix is：
θ=ω t
It is described to actually enter electric current iaIt converts to obtain two DC components of d axis and q axis, the reflection of d axis DC components by d q
Active current, q axis DC components reflect reactive current component, the phase angle theta of input voltage are obtained by PLL locking phases.
As a kind of preferred embodiment, the step SS3 is specifically included：
Step SS31：The DC voltage of the AC/DC rectifiers outlet side described to three samples, with given value UrefInto
Row compares, and error adjusts to obtain a reference value i of d shaft currents through PI controllersdref；
Step SS32：D shaft currents actual value and a reference value idrefIt being adjusted more afterwards through PI controllers, q axis a reference values are 0,
It is adjusted more afterwards through PI controllers with actual q shaft currents value, the output quantity d after two axis PI controlsd、dqAfter d q inverse transformations
To modulated signal d；
Step SS33：According to the derivation of equivalent small-signal model, d axis, q shaft current inner ring are decoupled.
As a kind of preferred embodiment, three AC/DC rectifiers include rectifier bridge module #1, rectifier bridge module #
2, rectifier bridge module #3.
As a kind of preferred embodiment, the step SS5 further includes：The rectifier bridge module #1's that feedback is obtained
DC voltage is compared with a reference value, then adjusts to obtain the d shaft currents of the rectifier bridge module #1 by PI controllers
The compensation component Δ d of ringd1, with initial d shaft current ring components ddIt is added the d axis electricity after obtaining the rectifier bridge module #1 adjustment
Flow the value d of ringd1, the modulation wave signal d of the rectifier bridge module #1 is obtained using d q inverse transformations1。
As a kind of preferred embodiment, the step SS5 further includes：The rectifier bridge module #2's that feedback is obtained
DC voltage is compared with a reference value, then adjusts to obtain the d shaft currents of the rectifier bridge module #2 by PI controllers
The compensation component Δ d of ringd2, with initial d shaft current ring components ddIt is added the d axis electricity after obtaining the rectifier bridge module #1 adjustment
Flow the value d of ringd2, the modulation wave signal d of the rectifier bridge module #2 is obtained using d q inverse transformations2。
As a kind of preferred embodiment, the step SS5 further includes：The compensation component Δ d of the rectifier bridge module #3d3
The negative value of the sum of compensation component for the rectifier bridge module #1 and rectifier bridge module #2, i.e.,：Δdd3=-Δ dd1-Δ
dd2；
To ensure that total compensation component for 0, obtains the compensation component Δ d of rectifier bridge module #3d3Modulating wave d is generated afterwards3's
Mode is as before, i.e., with initial d shaft current ring components ddIt is added the d axis electricity after obtaining the rectifier bridge module #3 adjustment
Flow the value d of ringd3, the modulation wave signal d of the rectifier bridge module #3 is obtained using d q inverse transformations3；By the rectifier bridge mould
The modulation wave signal d of block #1, the rectifier bridge module #2 and the rectifier bridge module #31、d2、d3, three with 120 ° of phase shift successively
Angle carrier wave relatively obtains the drive signal of control switching device.
Shown in Fig. 2 is single-phase d-q principle of vector control figure, and lower mask body introduces the single-phase d-q vectors work of the present invention
Principle：First, to the DC voltage of main circuit outlet sideIt is sampled, with given value UrefIt is compared,
Then outer voltage PI controls are carried out and introduce control coefrficientIt is adjusted to obtain a reference value i of d shaft currentsdref, by d
The a reference value i of shaft currentdrefWith d shaft current actual values idIt is compared, control coefrficient is introduced through d shaft current inner ring
PI is controlled, with actual q shaft currentsCompare rear PI to control to obtain d axis PI control output quantities dd；Electric current will be actually entered
ia90 ° of lag obtains virtual current im, obtain virtualphase and constitute rest frame two-phase；Input voltage is obtained by PLL locking phases again
Phase angle theta, pass through transformation matrix and realize transformation of the input side electric current from two-phase stationary coordinate system to rotating coordinate system, the transformation
Matrix is：
θ=ω t；
Q axis a reference values are 0, with actual d shaft currentsControl more afterwards through q shaft current inner ring PIAdjustment obtains q axis PI control output quantities dq, finally by ddWith dqModulated signal d is obtained after d q inverse transformations.
Shown in Fig. 3 is Pressure and Control schematic diagram, below come introduce the present invention Pressure and Control operation principle：First,
The DC voltage U for the rectifier bridge module #1 that feedback is obtainedd1With a reference value UrefIt is compared, is then controlled by PI
Control coefrficientAdjustment obtains the compensation component Δ d of the d shaft current rings of the rectifier bridge module #1d1, and it is initial
D shaft current ring components ddIt is added the value d of the d shaft current rings after obtaining the rectifier bridge module #1 adjustmentd1, using d q contravariant
Get the modulation wave signal d of the rectifier bridge module #1 in return1。
Second, the DC voltage U for the rectifier bridge module #2 that feedback is obtainedd2With a reference value UrefIt is compared, so
Pass through PI control coefrficients afterwardsAdjustment obtains the compensation component Δ d of the d shaft current rings of the rectifier bridge module #2d2, with
Initial d shaft current ring components ddIt is added the value d of the d shaft current rings after obtaining the rectifier bridge module #2 adjustmentd2, using d
Q inverse transformations obtain the modulation wave signal d of the rectifier bridge module #22。
Third, the compensation component Δ d of the rectifier bridge module #3d3For the rectifier bridge module #1 and the rectifier bridge mould
The negative value of the sum of the compensation component of block #2, i.e.,：Δdd3=-Δ dd1-Δdd2；To ensure that total compensation component for 0, obtains rectification
The compensation component Δ d of bridge module #3d3Modulating wave d is generated afterwards3Mode it is as before, i.e., with initial d shaft current ring components
ddIt is added the value d of the d shaft current rings after obtaining the rectifier bridge module #3 adjustmentd3, the rectification is obtained using d q inverse transformations
The modulation wave signal d of bridge module #33；By the rectifier bridge module #1, the rectifier bridge module #2 and the rectifier bridge module #3
Modulation wave signal d1、d2、d3, (240 °) ratios of triangular carrier SPWM (0 °), SPWM (120 °), SPWM with 120 ° of phase shift successively
The drive signal for relatively obtaining control switching device, respectively drives T11, T12, T13, T14, T21, T22, T23, T24, T31, T32,
DC voltage figure when T33, T34 such as Fig. 4 are laod unbalances, Fig. 5 are that grading ring section direct current lateral incision is added to carry procedure chart, Fig. 6
It is Pressure and Control static Simulation figure.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of control method that single-phase multi-module cascade solid-state transformer rectification stage is pressed, which is characterized in that including walking as follows
Suddenly：
Step SS1：The input side of three AC/DC rectifiers is composed in series main circuit, the input side of the main circuit is power frequency
The outlet side of voltage, each AC/DC rectifiers is DC voltage；
Step SS2：Carry out transformation of the two-phase stationary coordinate system to rotating coordinate system, construction virtual current im, the virtual current im
Delayed phase actually enter electric current ia90°；
Step SS3：To main circuit control using double-closed-loop control after d q transformation, the two close cycles include Voltage loop, electric current
Ring；The Voltage loop is outer shroud, and the electric current loop is inner ring；Then according to small signal equivalent model, electric current loop is decoupled；
Step SS4：The control signal of three AC/DC rectifiers is generated by phase-shifting carrier wave, three AC/DC rectifiers
A modulation wave signal d is shared, carrier wave lags 120 ° successively；
Step SS5：It keeps the q shaft current ring components of three AC/DC rectifiers equal, adjusts d shaft current ring components, realize
Press.
2. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 1 is pressed,
It is characterized in that, the step SS2 is specifically included：Of ac under rest frame is transformed into the direct current under rotating coordinate system
Amount, controls according to the method for DC converter；Electric current i will be actually entereda90 ° of lag obtains virtualphase and constitutes static coordinate
It is two-phase；The phase angle theta of input voltage is obtained by PLL locking phases again, realizes that input side electric current is static from two-phase by transformation matrix
To the transformation of rotating coordinate system, the transformation matrix is coordinate system：
θ=ω t
It is described to actually enter electric current iaIt converts to obtain two DC components of d axis and q axis by d q, the reflection of d axis DC components is active
Current component, q axis DC components reflect reactive current component.
3. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 1 is pressed,
It is characterized in that, the step SS3 is specifically included：
Step SS31：The DC voltage of the AC/DC rectifiers outlet side described to three samples, with given value UrefCompared
Compared with error adjusts to obtain a reference value i of d shaft currents through PI controllersdref；
Step SS32：D shaft currents actual value and a reference value idrefIt is adjusted more afterwards through PI controllers, q axis a reference values are 0, with reality
Q shaft currents value adjusted more afterwards through PI controllers, the output quantity d after two axis PI controlsd、dqIt is modulated after d q inverse transformations
Signal d；
Step SS33：According to the derivation of equivalent small-signal model, d axis, q shaft current inner ring are decoupled.
4. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 1 is pressed,
It is characterized in that, three AC/DC rectifiers include rectifier bridge module #1, rectifier bridge module #2, rectifier bridge module #3.
5. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 4 is pressed,
It is characterized in that, the step SS5 further includes：The DC voltage of the rectifier bridge module #1 that feedback is obtained and a reference value into
Row compares, and then adjusts to obtain the compensation component Δ d of the d shaft current rings of the rectifier bridge module #1 by PI controllersd1, and it is first
The d shaft current ring components d of beginningdIt is added the value d of the d shaft current rings after obtaining the rectifier bridge module #1 adjustmentd1, using d q
Inverse transformation obtains the modulation wave signal d of the rectifier bridge module #11。
6. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 5 is pressed,
It is characterized in that, the step SS5 further includes：The DC voltage of the rectifier bridge module #2 that feedback is obtained and a reference value into
Row compares, and then adjusts to obtain the compensation component Δ d of the d shaft current rings of the rectifier bridge module #2 by PI controllersd2, and it is first
The d shaft current ring components d of beginningdIt is added the value d of the d shaft current rings after obtaining the rectifier bridge module #2 adjustmentd2, using d q
Inverse transformation obtains the modulation wave signal d of the rectifier bridge module #22。
7. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 5 is pressed,
It is characterized in that, the step SS5 further includes：The compensation component Δ d of the rectifier bridge module #3d3For the rectifier bridge module #1 and
The negative value of the sum of the compensation component of the rectifier bridge module #2, i.e.,：Δdd3=-Δ dd1-Δdd2；
To ensure that total compensation component for 0, obtains the compensation component Δ d of rectifier bridge module #3d3Modulating wave d is generated afterwards3Mode
It is as before, i.e., with initial d shaft current ring components ddThe d shaft current rings being added after obtaining the rectifier bridge module #3 adjustment
Value dd3, the modulation wave signal d of the rectifier bridge module #3 is obtained using d q inverse transformations3；By the rectifier bridge module #1,
The modulation wave signal d of the rectifier bridge module #2 and the rectifier bridge module #31、d2、d3, carried with the triangle of 120 ° of phase shift successively
Bobbi is compared with the drive signal for obtaining controlling switching device.
8. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 1 is pressed,
It is characterized in that, the power-frequency voltage is 220V power-frequency voltages.
9. the control method that a kind of single-phase multi-module cascade solid-state transformer rectification stage according to claim 1 is pressed,
It is characterized in that, the DC voltage is 130V DC voltages.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478567A (en) * | 2020-03-12 | 2020-07-31 | 南京航空航天大学 | Cascade H-bridge rectifier bias component and fundamental component injection voltage-sharing method |
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