CN114884316A - Control method and system of Vienna rectifier - Google Patents
Control method and system of Vienna rectifier Download PDFInfo
- Publication number
- CN114884316A CN114884316A CN202210586809.1A CN202210586809A CN114884316A CN 114884316 A CN114884316 A CN 114884316A CN 202210586809 A CN202210586809 A CN 202210586809A CN 114884316 A CN114884316 A CN 114884316A
- Authority
- CN
- China
- Prior art keywords
- control
- switching tube
- driving signal
- output voltage
- wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a control method and a system of a Vienna rectifier, which are used for controlling a switching tube of the Vienna rectifier when direct current is input into the Vienna rectifier, wherein the control method comprises the following steps: establishing an equivalent circuit when direct current is input into the Vienna rectifier, and collecting an output voltage value, an output voltage reference value, an upper capacitor voltage value and a lower capacitor voltage value of the equivalent circuit; performing closed-loop control through an output voltage ring according to the output voltage value and the output voltage reference value to obtain a first control result, performing closed-loop control through a midpoint potential balance ring according to the upper capacitor voltage value and the lower capacitor voltage value to obtain a second control result, and obtaining a first modulation wave and a second modulation wave according to the first control result and the second control result; and comparing the first modulated wave and the second modulated wave with a first carrier wave and a second carrier wave respectively, and controlling a switching tube of the equivalent circuit through a first driving signal and a second driving signal according to a comparison result.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a control method and a control system of a Vienna rectifier.
Background
VIENNA rectifiers are new PWM rectifier topologies invented by professor j.w.kolar, et al, university of VIENNA, austria in the last 90 s, and three-phase VIENNA rectifier circuits and single-phase VIENNA rectifier circuits are common. The vienna rectifier is a power factor correction circuit (PFC), can realize an AC-DC function, belongs to a three-level PWM rectifier topology, has the advantages that the maximum bearing voltage of a switching tube is the general voltage of a direct-current bus during normal work, the switching tube has no direct connection phenomenon, and compared with other topologies, the vienna rectifier has small inductance ripple waves, small inductance volume, relatively large power density and lower harmonic wave of input current under the same switching frequency. Therefore, the vienna rectifier is widely applied to the application occasions of rectifiers with high power factor and low current harmonic, particularly in the fields of recent new energy automobile charging piles, vehicle-mounted chargers and aero-generators.
Generally, a three-phase vienna rectifier can be applied only to a three-phase ac input, and a single-phase vienna rectifier can be applied only to a single-phase ac input. In the absence of ac power, the vienna rectifier will not work, which limits its flexibility of application. Generally, there is no specific control method when the vienna rectifier is connected with a direct current input, the switching tube is always turned off, the direct current is directly input to the output side of the vienna rectifier through the diode, that is, the output voltage of the vienna rectifier is equal to the input direct current, the vienna rectifier cannot boost and stabilize the input voltage, when the input voltage fluctuates, the output voltage of the vienna rectifier fluctuates, and there is no midpoint potential balancing capability, and when the load at the rear stage dynamically changes, the voltage imbalance problem easily occurs in the dc bus capacitor voltage.
Disclosure of Invention
The invention provides a control method and a control system of a Vienna rectifier, which enable the Vienna rectifier to be compatible with direct current input, aiming at the technical problem that the Vienna rectifier cannot work when an alternating current power supply is lacked.
In a first aspect, an embodiment of the present application provides a control method for a vienna rectifier, for controlling a switching tube of the vienna rectifier when a direct current is input to the vienna rectifier, the control method including:
voltage acquisition: establishing an equivalent circuit when direct current is input into the Vienna rectifier, and collecting an output voltage value, an output voltage reference value, an upper capacitor voltage value and a lower capacitor voltage value of the equivalent circuit;
a modulated wave generation step: performing closed-loop control through an output voltage ring according to the output voltage value and the output voltage reference value to obtain a first control result, performing closed-loop control through a midpoint potential balance ring according to the upper capacitor voltage value and the lower capacitor voltage value to obtain a second control result, and obtaining a first modulation wave and a second modulation wave according to the first control result and the second control result;
a switching tube control step: and comparing the first modulated wave and the second modulated wave with a first carrier wave and a second carrier wave respectively, and controlling a switching tube of the equivalent circuit through a first driving signal and a second driving signal according to a comparison result.
The control method described above, wherein the modulated wave generating step includes:
a first control result obtaining step: inputting the difference between the output voltage reference value and the output voltage value into a PI controller in the output voltage ring, and controlling to output a first control result through the PI controller;
a second control result obtaining step: and inputting the difference between the voltage value of the upper capacitor and the voltage value of the lower capacitor into a PI controller in the neutral point potential balance ring, and controlling and outputting a second control result through the PI controller.
The control method described above, wherein the modulated wave generating step further includes: and setting the sum of the first control result and the second control result as the first modulated wave, and setting the difference between the first control result and the second control result as the second modulated wave.
The control method above, wherein the switching tube controlling step includes:
a first drive signal control step: when the first modulation wave is larger than or equal to the first carrier wave, the switching tube is controlled to be switched on through the first driving signal; when the first modulation wave is smaller than the first carrier wave, the switching tube is controlled to be switched off through the first driving signal;
a second drive signal control step: when the second modulation wave is larger than or equal to the second carrier wave, the switching tube is controlled to be switched on through the second driving signal; and when the second modulation wave is smaller than the second carrier wave, the switching tube is controlled to be switched off through the second driving signal.
In the above control method, the switching tube controlling step further includes:
if the positive electrode of the input direct current is connected with a first bridge arm of the equivalent circuit, the first driving signal controls the on-off of a first switching tube and a second switching tube of the equivalent circuit, and the second driving signal controls the on-off of a third switching tube and a fourth switching tube of the equivalent circuit;
if the positive electrode of the input direct current is connected with the second bridge arm of the equivalent circuit, the first driving signal controls the on-off of the third switching tube and the fourth switching tube of the equivalent circuit, and the second driving signal controls the on-off of the first switching tube and the second switching tube of the equivalent circuit.
In the control method, the first carrier wave and the second carrier wave are triangular waves with amplitudes from 0 to 1 and the same phase.
In a second aspect, an embodiment of the present application provides a control system of a vienna rectifier for implementing the above control method, including:
the voltage acquisition unit is used for establishing an equivalent circuit when direct current is input into the Vienna rectifier and acquiring an output voltage value, an output voltage reference value, an upper capacitor voltage value and a lower capacitor voltage value of the equivalent circuit;
the modulation wave generating unit is used for carrying out closed-loop control through an output voltage loop according to the output voltage value and the output voltage reference value to obtain a first control result, carrying out closed-loop control through a midpoint potential balance loop according to the upper capacitor voltage value and the lower capacitor voltage value to obtain a second control result, and obtaining a first modulation wave and a second modulation wave according to the first control result and the second control result;
and the switching tube control unit compares the first modulation wave and the second modulation wave with a first carrier wave and a second carrier wave respectively, and controls the switching tube of the equivalent circuit through a first driving signal and a second driving signal according to a comparison result.
The control system described above, wherein the modulated wave generating unit includes:
the first control result obtaining module is used for inputting the difference between the output voltage reference value and the output voltage value into a PI controller in the output voltage ring and controlling and outputting a first control result through the PI controller;
and the second control result acquisition module inputs the difference between the voltage value of the upper capacitor and the voltage value of the lower capacitor into the PI controller in the midpoint potential balancing ring and outputs a second control result under the control of the PI controller.
The control system described above, wherein the modulated wave generating unit further includes:
a modulated wave obtaining module: and setting the sum of the first control result and the second control result as the first modulated wave, and setting the difference between the first control result and the second control result as the second modulated wave.
The above control system, wherein the switching tube control unit includes:
the first driving signal control module: when the first modulation wave is larger than or equal to the first carrier wave, the switching tube is controlled to be switched on through the first driving signal; when the first modulation wave is smaller than the first carrier wave, the switching tube is controlled to be switched off through the first driving signal;
the second driving signal control module: when the second modulation wave is larger than or equal to the second carrier wave, the switching tube is controlled to be switched on through the second driving signal; and when the second modulation wave is smaller than the second carrier wave, the switching tube is controlled to be switched off through the second driving signal.
Compared with the prior art, the invention has the advantages and positive effects that:
the control method of the Vienna rectifier provided by the invention enables the Vienna rectifier to be compatible with direct current input, can realize a DC-DC conversion function when the Vienna rectifier is in direct current input, outputs stable direct current voltage, realizes neutral point potential balance, widens the application range of the Vienna rectifier, improves the flexibility of the Vienna rectifier, and can meet the use requirements of the Vienna rectifier under special conditions such as emergency working conditions.
Drawings
Fig. 1 is a flowchart of a control method of a vienna rectifier according to the present invention;
FIG. 2 is a schematic diagram of an equivalent circuit of the Vienna rectifier according to the present invention when the DC input is provided;
FIG. 3 is a flowchart based on step S2 in FIG. 1 according to the present invention;
FIG. 4 is a flowchart based on step S3 in FIG. 1 according to the present invention;
FIG. 5 is a block diagram of a DC-DC control algorithm for a Vienna rectifier according to the present invention when DC input is provided;
FIG. 6 is a simulink simulation model of a Vienna rectifier DC input provided by the present invention;
FIG. 7 is a simulation result of the output voltage provided by the present invention;
FIG. 8 is a simulation result of the voltage difference between the upper capacitor C1 and the lower capacitor C2 according to the present invention;
fig. 9 is a schematic structural diagram of a control system of the vienna rectifier provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the application, and that it is also possible for a person skilled in the art to apply the application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
The first embodiment is as follows:
fig. 1 is a flowchart of a control method of a vienna rectifier according to the present invention; as shown in fig. 1, the control method of the present invention is a method for controlling a switching tube of a vienna rectifier when a direct current is input to the vienna rectifier, the method including:
step S1: establishing an equivalent circuit when direct current is input into the Vienna rectifier, and collecting an output voltage value, an output voltage reference value, an upper capacitor voltage value and a lower capacitor voltage value of the equivalent circuit;
specifically, when the input of the three-phase vienna rectifier is connected with direct current and the input of the single-phase vienna rectifier is connected with direct current, the circuit can be equivalent to the circuit shown in fig. 2. And when the input of the three-phase Vienna rectifier is connected with direct current, the suspended bridge arm switching tubes are required to be always turned off, and only two bridge arms connected with the direct current are controlled.
In the circuit shown in fig. 2, the arm formed by diode D1, diode D2, switching tube Q1, and switching tube Q2 is defined as arm a, and the arm formed by diode D3, diode D4, switching tube Q3, and switching tube Q4 is defined as arm B.
The circuit needs to collect the voltage u of the upper capacitor C1 C1 And the voltage u of the lower capacitor C2 C2 For neutral-point potential balance control, i.e. control u C1 Is equal to u C2 (ii) a Also needs to collect the output voltage u dc Or use u C1 、u C2 Form an output voltage (u) dc ＝u C1 +u C2 ) For control of the output voltage.
Taking the circuit of fig. 2 as an example, the working mode of the circuit is analyzed:
(1) when the switching tubes Q1, Q2, Q3 and Q4 are switched on, the voltage u between A, B AB When the load is equal to 0, the direct current power supply stores energy to the inductor L, and the capacitors C1 and C2 supply power to the load RL;
(2) when the switching tubes Q1 and Q2 are switched on and the switching tubes Q3 and Q4 are switched off, the voltage u between A, B AB ＝u C2 ＝u dc A direct-current power supply and an inductor L charge a capacitor C2, and the direct-current power supply, the inductor L and a capacitor C1 supply power to a load RL;
(3) when the switching tubes Q1 and Q2 are turned off and the switching tubes Q3 and Q4 are turned on, the voltage u between A, B AB ＝u C1 ＝u dc A direct-current power supply and an inductor L charge a capacitor C1, and the direct-current power supply, the inductor L and a capacitor C2 supply power to a load RL;
(4) when the switching tubes Q1, Q2, Q3 and Q4 are turned off, the voltage u between A, B AB ＝u dc The dc power supply and the inductor L charge the capacitors C1 and C2 and simultaneously supply power to the load RL.
Namely, when the input of the Vienna rectifier is connected with direct current, the Vienna rectifier is equivalent to a three-level DC-DC Boost booster circuit.
Step S2: performing closed-loop control through an output voltage ring according to the output voltage value and the output voltage reference value to obtain a first control result, performing closed-loop control through a midpoint potential balance ring according to the upper capacitor voltage value and the lower capacitor voltage value to obtain a second control result, and obtaining a first modulation wave and a second modulation wave according to the first control result and the second control result;
as shown in fig. 3, step S2 specifically includes the following contents:
step S21: inputting the difference between the output voltage reference value and the output voltage value into a PI controller in the output voltage ring, and controlling to output a first control result through the PI controller;
step S22: and inputting the difference between the voltage value of the upper capacitor and the voltage value of the lower capacitor into a PI controller in the neutral point potential balance ring, and controlling and outputting a second control result through the PI controller.
Step S23: and setting the sum of the first control result and the second control result as the first modulated wave, and setting the difference between the first control result and the second control result as the second modulated wave.
Step S3: and comparing the first modulated wave and the second modulated wave with a first carrier wave and a second carrier wave respectively, and controlling a switching tube of the equivalent circuit through a first driving signal and a second driving signal according to a comparison result.
As shown in fig. 4, step S3 specifically includes the following contents:
step S31: when the first modulation wave is larger than or equal to the first carrier wave, the switching tube is controlled to be switched on through the first driving signal; when the first modulation wave is smaller than the first carrier wave, the switching tube is controlled to be switched off through the first driving signal;
step S32: when the second modulation wave is larger than or equal to the second carrier wave, the switching tube is controlled to be switched on through the second driving signal; and when the second modulation wave is smaller than the second carrier wave, the switching tube is controlled to be switched off through the second driving signal.
The first carrier wave and the second carrier wave are triangular waves with the amplitude of 0 to 1 and the same phase.
In the above embodiment, step S3 further includes:
if the positive electrode of the input direct current is connected with a first bridge arm of the equivalent circuit, the first driving signal controls the on-off of a first switching tube and a second switching tube of the equivalent circuit, and the second driving signal controls the on-off of a third switching tube and a fourth switching tube of the equivalent circuit;
if the positive electrode of the input direct current is connected with the second bridge arm of the equivalent circuit, the first driving signal controls the on-off of the third switching tube and the fourth switching tube of the equivalent circuit, and the second driving signal controls the on-off of the first switching tube and the second switching tube of the equivalent circuit.
The DC-DC control method for the direct current input of the Vienna rectifier provided by the invention enables the Vienna rectifier to be compatible with the direct current input. When the input of the Vienna rectifier is connected with direct current, the Vienna rectifier is equivalent to a three-level DC-DC Boost circuit, the method is operated for control, and the Vienna rectifier can continue to work normally and output direct current voltage.
Referring to fig. 5, fig. 5 is a block diagram of a DC-DC control algorithm of the vienna rectifier according to the present invention when DC input is provided; the following describes a specific embodiment of the method for controlling a vienna rectifier according to the present invention with reference to fig. 5.
The DC-DC control algorithm for the direct current input of the Vienna rectifier designed by the invention is composed of two closed-loop control loops of an output voltage loop and a midpoint potential balance loop, and the controllers are PI controllers.
Reference value u of output voltage dc * And the collected value u of the output voltage dc The difference is used as an input of an output voltage loop PI controller, and the output range of the output voltage loop PI controller is 0 to 1. The output voltage loop controls the output voltage to be stabilized at a reference value u dc * 。
Upper capacitor voltage u C1 And the lower capacitor voltage u C2 The difference is used as the input of the middle point potential balance ring PI controller, and the output range of the middle point potential balance ring PI controller is-1 to 1. Capacitor voltage u controlled by neutral potential balance ring C1 Equal to the lower capacitor voltage u C2 。
The sum of the output quantity of the output voltage loop PI controller and the output quantity of the midpoint potential balance loop PI controller is a modulation wave 1, and the difference between the output quantity of the output voltage loop PI controller and the output quantity of the midpoint potential balance loop PI controller is a modulation wave 2. The carrier 1 and the carrier 2 are triangular waves with the same amplitude and phase as 0 to 1.
When the modulation wave 1 is larger than or equal to the carrier wave 1, the driving signal 1 controls the switching tube to be switched on, and when the modulation wave 1 is smaller than the carrier wave 1, the driving signal 1 controls the switching tube to be switched off; when the modulation wave 2 is larger than or equal to the carrier wave 2, the driving signal 2 controls the switching tube to be switched on, and when the modulation wave 2 is smaller than the carrier wave 2, the driving signal 2 controls the switching tube to be switched off.
And defining an input direct current connection flag bit flagAB. If the positive pole of the input direct current is connected with the bridge arm A in the figure 2, flagAB is 1; if the positive pole of the input direct current is connected with the bridge arm B in the figure 2, flagAB is-1.
If flagAB is equal to 1, driving signal 1 controls switching tubes Q1 and Q2, and driving signal 2 controls switching tubes Q3 and Q4; if flagAB equals-1, driving signal 1 controls the switch transistors Q3, Q4, and driving signal 2 controls the switch transistors Q1, Q2.
The output voltage u can be realized by controlling the on and off of the switching tubes Q1, Q2, Q3 and Q4 dc While realizing neutral point potential balance, i.e. controlling capacitor voltage sharing u C1 ＝u C2 。
In order to verify the DC-DC control method designed by the invention, a simulink simulation model is built when the direct current of the Vienna rectifier is input, as shown in FIG. 6. The output voltage reference value DC700V and the output load are 5kW, the simulation results are shown in FIGS. 7 and 8, the output voltage is stabilized at DC700V, and the voltage of the upper capacitor C1 is equal to that of the lower capacitor C2. The DC-DC control method can realize the DC-DC conversion function when the Vienna rectifier inputs the direct current, output stable direct current voltage and realize neutral point potential balance; the three-phase Vienna rectifier and the single-phase Vienna rectifier can be compatible with direct current input, the application range of the Vienna rectifier is widened, the use flexibility of the Vienna rectifier is improved, and the use requirements of the Vienna rectifier under special conditions such as emergency working conditions can be met.
Example two:
in conjunction with the method for controlling a vienna rectifier disclosed in the first embodiment, this embodiment discloses a specific implementation example of a control system (hereinafter referred to as "system") of a vienna rectifier for implementing the above control method.
As shown in fig. 9, the control system of the vienna rectifier includes:
the voltage acquisition unit 11 is used for establishing an equivalent circuit when direct current is input into the Vienna rectifier, and acquiring an output voltage value, an output voltage reference value, an upper capacitor voltage value and a lower capacitor voltage value of the equivalent circuit;
the modulation wave generating unit 12 performs closed-loop control through an output voltage loop according to the output voltage value and the output voltage reference value to obtain a first control result, performs closed-loop control through a midpoint potential balancing loop according to the upper capacitance voltage value and the lower capacitance voltage value to obtain a second control result, and obtains a first modulation wave and a second modulation wave according to the first control result and the second control result;
specifically, the modulated wave generating unit 12 includes:
a first control result obtaining module 121, configured to input a difference between the output voltage reference value and the output voltage value to a PI controller in the output voltage loop, and control the PI controller to output a first control result;
and a second control result obtaining module 122, configured to input a difference between the upper capacitor voltage value and the lower capacitor voltage value to a PI controller in the midpoint potential balancing ring, and output a second control result under control of the PI controller.
The modulated wave obtaining module 123: and setting the sum of the first control result and the second control result as the first modulated wave, and setting the difference between the first control result and the second control result as the second modulated wave.
And a switching tube control unit 13 that compares the first modulated wave and the second modulated wave with the first carrier wave and the second carrier wave, respectively, and controls the switching tube of the equivalent circuit according to a comparison result by using the first driving signal and the second driving signal.
Specifically, the switching tube control unit 13 includes:
the first driving signal control module 131: when the first modulation wave is larger than or equal to the first carrier wave, the switching tube is controlled to be switched on through the first driving signal; when the first modulation wave is smaller than the first carrier wave, the switching tube is controlled to be switched off through the first driving signal;
the second driving signal control module 132: when the second modulation wave is larger than or equal to the second carrier wave, the switching tube is controlled to be switched on through the second driving signal; and when the second modulation wave is smaller than the second carrier wave, the switching tube is controlled to be switched off through the second driving signal.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A vienna rectifier control method for controlling a switching tube of a vienna rectifier when a direct current is input to the vienna rectifier, the control method comprising:
voltage acquisition: establishing an equivalent circuit when direct current is input into the Vienna rectifier, and collecting an output voltage value, an output voltage reference value, an upper capacitor voltage value and a lower capacitor voltage value of the equivalent circuit;
a modulated wave generation step: performing closed-loop control through an output voltage ring according to the output voltage value and the output voltage reference value to obtain a first control result, performing closed-loop control through a midpoint potential balance ring according to the upper capacitor voltage value and the lower capacitor voltage value to obtain a second control result, and obtaining a first modulation wave and a second modulation wave according to the first control result and the second control result;
a switching tube control step: and comparing the first modulated wave and the second modulated wave with a first carrier wave and a second carrier wave respectively, and controlling a switching tube of the equivalent circuit through a first driving signal and a second driving signal according to a comparison result.
2. The control method according to claim 1, wherein the modulated wave generating step includes:
a first control result obtaining step: inputting the difference between the output voltage reference value and the output voltage value into a PI controller in the output voltage ring, and controlling to output a first control result through the PI controller;
a second control result obtaining step: and inputting the difference between the voltage value of the upper capacitor and the voltage value of the lower capacitor into a PI controller in the neutral point potential balance ring, and controlling and outputting a second control result through the PI controller.
3. The control method according to claim 2, wherein the modulated wave generating step further includes: and setting the sum of the first control result and the second control result as the first modulated wave, and setting the difference between the first control result and the second control result as the second modulated wave.
4. The control method according to claim 3, wherein the switching tube controlling step includes:
a first drive signal control step: when the first modulation wave is larger than or equal to the first carrier wave, the switching tube is controlled to be switched on through the first driving signal; when the first modulation wave is smaller than the first carrier wave, the switching tube is controlled to be switched off through the first driving signal;
a second drive signal control step: when the second modulation wave is larger than or equal to the second carrier wave, the switching tube is controlled to be switched on through the second driving signal; and when the second modulation wave is smaller than the second carrier wave, the switching tube is controlled to be switched off through the second driving signal.
5. The control method according to claim 4, wherein the switching tube controlling step further includes:
if the positive electrode of the input direct current is connected with a first bridge arm of the equivalent circuit, the first driving signal controls the on-off of a first switching tube and a second switching tube of the equivalent circuit, and the second driving signal controls the on-off of a third switching tube and a fourth switching tube of the equivalent circuit;
if the positive electrode of the input direct current is connected with the second bridge arm of the equivalent circuit, the first driving signal controls the on-off of the third switching tube and the fourth switching tube of the equivalent circuit, and the second driving signal controls the on-off of the first switching tube and the second switching tube of the equivalent circuit.
6. The control method according to claim 1, wherein the first carrier wave and the second carrier wave are triangular waves having an amplitude of 0 to 1 and a phase identical to each other.
7. A control system of a vienna rectifier for implementing the control method of any one of claims 1 to 6, comprising:
the voltage acquisition unit is used for establishing an equivalent circuit when direct current is input into the Vienna rectifier and acquiring an output voltage value, an output voltage reference value, an upper capacitor voltage value and a lower capacitor voltage value of the equivalent circuit;
the modulation wave generating unit is used for carrying out closed-loop control through an output voltage loop according to the output voltage value and the output voltage reference value to obtain a first control result, carrying out closed-loop control through a midpoint potential balance loop according to the upper capacitor voltage value and the lower capacitor voltage value to obtain a second control result, and obtaining a first modulation wave and a second modulation wave according to the first control result and the second control result;
and the switching tube control unit compares the first modulation wave and the second modulation wave with a first carrier wave and a second carrier wave respectively, and controls the switching tube of the equivalent circuit through a first driving signal and a second driving signal according to a comparison result.
8. The control system according to claim 7, wherein the modulated wave generating unit includes:
the first control result obtaining module is used for inputting the difference between the output voltage reference value and the output voltage value into a PI controller in the output voltage ring and controlling and outputting a first control result through the PI controller;
and the second control result obtaining module is used for inputting the difference between the voltage value of the upper capacitor and the voltage value of the lower capacitor into the PI controller in the midpoint potential balancing ring and outputting a second control result under the control of the PI controller.
9. The control system according to claim 8, wherein the modulated wave generating unit further includes:
a modulated wave obtaining module: and setting the sum of the first control result and the second control result as the first modulated wave, and setting the difference between the first control result and the second control result as the second modulated wave.
10. The control system according to claim 9, wherein the switching tube control unit includes:
the first driving signal control module: when the first modulation wave is larger than or equal to the first carrier wave, the switching tube is controlled to be switched on through the first driving signal; when the first modulation wave is smaller than the first carrier wave, the switching tube is controlled to be switched off through the first driving signal;
the second driving signal control module: when the second modulation wave is larger than or equal to the second carrier wave, the switching tube is controlled to be switched on through the second driving signal; and when the second modulation wave is smaller than the second carrier wave, the switching tube is controlled to be switched off through the second driving signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210586809.1A CN114884316A (en) | 2022-05-27 | 2022-05-27 | Control method and system of Vienna rectifier |
| PCT/CN2022/131671 WO2023226317A1 (en) | 2022-05-27 | 2022-11-14 | Control method and system for vienna rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210586809.1A CN114884316A (en) | 2022-05-27 | 2022-05-27 | Control method and system of Vienna rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114884316A true CN114884316A (en) | 2022-08-09 |
Family
ID=82676756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210586809.1A Pending CN114884316A (en) | 2022-05-27 | 2022-05-27 | Control method and system of Vienna rectifier |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114884316A (en) |
| WO (1) | WO2023226317A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226317A1 (en) * | 2022-05-27 | 2023-11-30 | 中车青岛四方车辆研究所有限公司 | Control method and system for vienna rectifier |
| CN117748694A (en) * | 2023-11-06 | 2024-03-22 | 江苏科曜能源科技有限公司 | Charging device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9166472B2 (en) * | 2012-10-11 | 2015-10-20 | Hamilton Sundstrand Corporation | EMI filtering for active rectifier power systems |
| CN106849705A (en) * | 2017-03-24 | 2017-06-13 | 三峡大学 | A kind of current predictive control method based on single-phase Vienna rectifiers |
| CN111404221B (en) * | 2020-03-19 | 2021-11-09 | 深圳市科华恒盛科技有限公司 | Control method, control device, control equipment and storage medium of charging module |
| CN114884316A (en) * | 2022-05-27 | 2022-08-09 | 中车青岛四方车辆研究所有限公司 | Control method and system of Vienna rectifier |
-
2022
- 2022-05-27 CN CN202210586809.1A patent/CN114884316A/en active Pending
- 2022-11-14 WO PCT/CN2022/131671 patent/WO2023226317A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226317A1 (en) * | 2022-05-27 | 2023-11-30 | 中车青岛四方车辆研究所有限公司 | Control method and system for vienna rectifier |
| CN117748694A (en) * | 2023-11-06 | 2024-03-22 | 江苏科曜能源科技有限公司 | Charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023226317A1 (en) | 2023-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10892682B2 (en) | Power converter with controllable DC offset | |
| JP6191830B2 (en) | Power conversion system | |
| CN114884316A (en) | Control method and system of Vienna rectifier | |
| WO2012005607A2 (en) | Inductive power transfer system | |
| WO2009012008A2 (en) | Methods and apparatus for three-phase inverter with reduced energy storage | |
| Young et al. | A Cockcroft–Walton voltage multiplier fed by a three-phase-to-single-phase matrix converter with PFC | |
| CN108173299A (en) | Wireless receiving device and use its wireless power transmission device and rectifier | |
| CN105337520A (en) | Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance | |
| Wang et al. | An AC side-active power decoupling modular for single phase power converter | |
| Ohnuma et al. | A control method for a single-to-three-phase power converter with an active buffer and a charge circuit | |
| KR20190115364A (en) | Single and three phase combined charger | |
| Sayed et al. | New PWM technique for grid-tie isolated bidirectional DC-AC inverter based high frequency transformer | |
| Jain et al. | a novel single/multiple output multilevel buck rectifier for EV-battery charging | |
| Sayed et al. | Modeling and control of bidirectional isolated battery charging and discharging converter based high-frequency link transformer | |
| JP5661818B2 (en) | Mixed DC / AC conversion system and control method thereof | |
| Yuan et al. | A single-phase vienna rectifier with wide output voltage range | |
| JP2023523866A (en) | power converter | |
| Hu et al. | Sinusoidal-Ripple-Current Charging Modulation for Semi-Dual-Active-Bridge AC-DC Converter with Full Soft Switching and Power Factor Correction | |
| Huang et al. | An automatic power decoupling control method on three level DC-AC converter to suppress the double-line-frequency ripple | |
| Batista et al. | Proposal of three-phase two-level unidirectional SEPIC PWM rectifiers with high power factor | |
| Thangaprakash et al. | Modified Space Vector Modulated Z Source Inverter with Effective DC Boost and Lowest Switching Stress | |
| Mahdavi et al. | A new wireless power transfer topology based on quasi-Z-source and LLC resonant network with low input current THD | |
| Zhang et al. | Transformerless three-level DC-DC buck converter with a high step-down conversion ratio | |
| Pham et al. | A Three-Phase Isolated Rectifier using Current Unfolding and Active Damping Methods | |
| Xu et al. | Carrier-Based Modulated Model Predictive Control for Vienna Rectifiers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |