CN112688584B - Three-level topology ANPC four-quadrant operation modulation method - Google Patents
Three-level topology ANPC four-quadrant operation modulation method Download PDFInfo
- Publication number
- CN112688584B CN112688584B CN202011492095.5A CN202011492095A CN112688584B CN 112688584 B CN112688584 B CN 112688584B CN 202011492095 A CN202011492095 A CN 202011492095A CN 112688584 B CN112688584 B CN 112688584B
- Authority
- CN
- China
- Prior art keywords
- diode
- power device
- current
- follow current
- switching tube
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000007935 neutral effect Effects 0.000 claims description 12
- 230000003111 delayed effect Effects 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Images
Classifications
-
- 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
- Inverter Devices (AREA)
Abstract
The invention discloses a three-level topology ANPC four-quadrant operation modulation method, which adopts a high-frequency modulation signal to drive a PWM (pulse-width modulation) driving signal of a power device; when zero-level follow current starts, 1 short follow current path is used for forced commutation, and then 1 follow current path is additionally opened to balance loss; when the zero-level follow current is finished, the additionally-opened follow current path is firstly turned off, and the current is forced to follow the current from the short follow current path again; when positive/negative electricity is output, the clamping tube is switched on in time, and reliable bidirectional clamping is carried out on the two series pressure-bearing switch tubes. The modulation mode optimizes a zero-level follow current mode and a follow current loop, reduces the switching loss of the power device, balances the loss distribution of the power device under various working conditions during rectification, inversion and four-quadrant operation, and reliably clamps the pressure-bearing power device to realize the advantage of voltage sharing.
Description
Technical Field
The invention belongs to the technical field of power electronics, relates to a PWM (pulse-width modulation) technology of an ANPC (analog to digital converter) power circuit topology, and particularly relates to a three-level topology ANPC four-quadrant operation modulation method.
Background
Due to the rapid development of power electronic technology, multilevel technology is increasingly widely used, wherein diode clamped (NPC) three-level technology is the most commonly used power electronic power conversion technology in low-voltage (below 3 kV) applications. The structure can be more compact and lower in cost without using a transformer, but the structure has the problem of unbalanced loss of power devices (mainly IGBT), so that the improvement of the system capacity is limited, and in addition, the integration degree of the power devices is very high in consideration of factors such as cost and the like, and once the loss is unbalanced, the stability of the system is seriously influenced.
In order to solve this problem, active Neutral Point Clamped (ANPC) type three-level technology has attracted more and more attention and applications in recent years, and this structure can realize the balance of the power device loss, which has great advantages.
At present, the application of the ANPC three-level technology is mainly focused on the field of new energy, and the PWM method only needs to consider loss balance under inversion application, and rarely considers application under rectification and four-quadrant conditions.
Disclosure of Invention
The invention provides a three-level topology ANPC four-quadrant operation modulation method aiming at the explanation of the background art, and the invention provides a PWM modulation method which can effectively balance the loss of each power device based on the operation of the three-level topology ANPC under the four-quadrant condition, and effectively solves the problem of the loss balance of each power device under the four-quadrant operation condition.
In order to achieve the purpose, the invention provides the following technical scheme:
a three-level topology ANPC four-quadrant operation modulation method comprises the following steps:
driving a PWM driving signal of a power device by adopting a high-frequency modulation signal;
when zero-level follow current starts, a short follow current path is used for forced commutation, and then a follow current path is additionally opened to balance loss;
when the zero-level follow current is finished, the additionally-opened follow current path is firstly turned off, and the current is forced to follow the current from the short follow current path again;
when positive/negative electricity is output, the clamping tube is switched on timely to carry out reliable bidirectional clamping on the two series pressure-bearing switch tubes.
As a further improvement of the present invention, the three-level topology ANPC includes six power devices, where the six power devices include a switching tube G1 and a diode D1, a switching tube G2 and a diode D2, a switching tube G3 and a diode D3, a switching tube G4 and a diode D4, a switching tube G5 and a diode D5, and a switching tube G6 and a diode D6, respectively.
As a further improvement of the invention, zero level follow current starts, and dead time T is delayed after the switch tube G1/switch tube G4 are turned off 1 When current flows through the diode D2 and the diode D1 and flows to the positive bus, the follow current path is forced to change from the diode D2 and the diode D1 to the diode D2 and the switch tube G5, and then flows to the neutral point; when current flows through the diode D4 and the diode D3 to follow current to the negative bus, the follow current path is forced to be changed from the diode D4 and the diode D3 into the switch tube G6 and the diode D3, and the current flows to the middlePerforming linear point follow current; then delayed by a dead time T 2 And a switching tube G2 and a switching tube G3 are switched on, a diode D5 and a switching tube G2 are additionally switched on, and a switching tube G3 and a diode D6 form two follow current loops.
As a further improvement of the invention, when the zero level follow current is finished, the switch tube G2 and the switch tube G3 are turned off firstly, and a dead time T is delayed 3 Then switching off the switch tube G5 and the switch tube G6, and delaying for a dead time T 4 Then the switch tube G1/the switch tube G4 are switched on, and the zero level follow current state is quitted.
As a further improvement of the invention, when the output positive/negative voltage level is conducted, a dead time T is delayed after the switch tube G1/the switch tube G4 are conducted 1 Switching on a switch tube G6/a switch tube G5, and carrying out voltage-sharing clamping on a switch tube G3, a switch tube G4/a switch tube G1 and a switch tube G2; before the switch tube G1/the switch tube G4 is switched off, a dead time T is advanced 4 And switching off the tube G6/tube G5.
As a further improvement of the invention, the frequency of the high-frequency modulation signal is 6 kHz-20 kHz.
As a further improvement of the present invention, the three-level topology ANPC includes two capacitors and a plurality of power devices; two capacitors connected in series are arranged on the direct current side in series; the power device comprises a switching tube and an anti-parallel diode thereof;
the first power device, the second power device, the third power device and the fourth power device are sequentially connected in series, the first power device is connected with the positive end of the first capacitor, and the fourth power device is connected with the negative end of the second capacitor;
the fifth power device and the sixth power device are connected in parallel, the middle points of the fifth power device and the sixth power device are connected with the middle points of the two capacitors, and the fifth power device and the sixth power device are respectively connected with the middle points of the first power device and the second power device and the middle points of the third power device and the fourth power device;
the middle points of the second power device and the third power device are connected with the AC end of the output point.
As a further improvement of the invention, the power device is an IGBT or a MOSFET.
Compared with the prior art, the invention has the beneficial effects that:
the method provided by the invention considers the working condition of four-quadrant operation, optimizes a zero-level follow current mode and a follow current loop, reduces the switching loss of the power device, balances the loss distribution of the power device when the four-quadrant operation voltage and current are in different phases, opens the clamping tube when outputting positive/negative voltage, reliably carries out bidirectional voltage sharing on the pressure-bearing series power device, and has the characteristics of simple structure, flexible implementation scheme, high power conversion efficiency and balanced loss of the power device during four-quadrant operation.
The invention relates to a three-level Active Neutral Point Clamping (ANPC) power circuit topology, in particular to a power device driving PWM signal modulation method with four-quadrant operation capability. All power devices in the modulation method are driven by high-frequency modulation signals, and when current flows in a zero level state, the switch tube G5 and the switch tube G6 are switched on first, and a short current-flowing path is adopted, so that the switching loss of the power devices is reduced, and the efficiency is improved; and then the switch tube G2 and the switch tube G3 are switched on, and 1 zero-level follow current loop is additionally switched on, so that the losses of different power devices are well balanced. When outputting positive/negative voltage, the switch tube G6/switch tube G5 is switched on in time, and the voltages born by the switch tube G3, the switch tube G4/switch tube G1 and the switch tube G2 are reliably clamped. Compared with other modulation modes which are more applied at present, the modulation method optimizes a zero-level follow current mode and a follow current loop, reduces the switching loss of the power device, balances the loss distribution of the power device under various working conditions during rectification, inversion and four-quadrant operation, keeps the conduction of the switching tube G5 and the switching tube G6 when the three-level topology ANPC outputs positive/negative voltage, reliably clamps the pressure-bearing power device to realize the advantage of voltage sharing, and has the characteristics of simple structure, flexible implementation scheme, high power conversion efficiency and balanced four-quadrant operation loss.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an ANPC three-level power circuit topology;
FIG. 2 is a schematic diagram of zero level freewheeling;
FIG. 3 is a schematic of positive/negative level active clamping; (a) Positive level active clamping, (b) negative level active clamping;
FIG. 4 is a schematic diagram of a power device PWM modulation signal;
fig. 5 is a modulation signal dead zone diagram.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a three-level topology ANPC includes two capacitors and a plurality of power devices; two capacitors connected in series are arranged on the direct current side in series; the power device comprises a switching tube and an anti-parallel diode thereof;
the circuit comprises two capacitors (C1 and C2) which are connected in series, four switching tubes (a switching tube G1, a switching tube G2, a switching tube G3 and a switching tube G4) which are connected with the two ends of the two capacitors in a connecting manner, anti-parallel diodes (a diode D1, a diode D2, a diode D3 and a diode D4) of the four switching tubes, two switching tubes (a switching tube G5 and a switching tube G6) which are connected with the midpoints of the two capacitors (C1 and C2) in a connecting manner, and anti-parallel diodes (a diode D5 and a diode D6) of the four switching tubes;
the first power device, the second power device, the third power device and the fourth power device are sequentially connected in series, the first power device is connected with the positive end of the first capacitor, and the fourth power device is connected with the negative end of the second capacitor;
the fifth power device and the sixth power device are connected in parallel, the middle points of the fifth power device and the sixth power device are connected with the middle points of the two capacitors, and the fifth power device and the sixth power device are respectively connected with the middle points of the first power device and the second power device and the middle points of the third power device and the fourth power device;
the middle points of the second power device and the third power device are connected with the AC end of the output point.
According to the three-level topology ANPC four-quadrant operation modulation method, PWM driving signals of all power devices are driven by high-frequency modulation signals, and a high-frequency switch tube and a power-frequency switch tube are not distinguished. When zero-level follow current starts, 1 short follow current path is used for forced commutation, and then 1 follow current path is additionally opened to balance loss; when the zero-level follow current is finished, the additionally opened follow current path is firstly turned off, and the current is forced to follow the current from the short follow current path. When positive/negative electricity is output, the clamping tube is switched on in time, and reliable bidirectional clamping is carried out on the two series pressure-bearing switch tubes.
The four-quadrant operation means that the phase difference between the phase of the AC side voltage and the actual current can be changed at will within a range of 0 to 360 degrees, and is not limited to rectification or inversion (i.e., the voltage and the current are in phase or in phase opposition).
The high-frequency modulation signal is relative to the power frequency of 50Hz, and the actually used switching frequency depends on the switching characteristics of the power device and the requirements of practical application.
When the zero level follow current state begins, delaying a dead time T after the switching tube G1/the switching tube G4 is turned off D14 Firstly, switching on a switch tube G5 and a switch tube G6, and changing the follow current of the positive bus and the negative bus into follow current to a neutral point; then delaying a dead time T U23 And a switch tube G2 and a switch tube G3 are switched on, and a follow current loop is additionally provided, so that two follow current loops are ensured to be available in a zero-level follow current steady state when the four-quadrant operating voltage and current phase change, and the loss of a power device is balanced.
When the zero level follow current state is finished, the switching tube G2 and the switching tube G3 are turned off first, and a dead time T is delayed D23 Then switching off the switch tube G5 and the switch tube G6, and delaying for a dead time T U14 Then switch on the switch tube GAnd the 1/switch tube G4 exits from the zero-level follow current state, so that the on-off sequence of each switch tube is consistent.
Delaying a dead time T after the switch tube G1/switch tube G4 conduct outputs the positive/negative level clamp Switching on a switch tube G6/a switch tube G5, and carrying out voltage-sharing clamping on a switch tube G3, a switch tube G4/a switch tube G1 and a switch tube G2 respectively; before the switch tube G1/the switch tube G4 is turned off, a dead time T is advanced clamp And switching off the tube G6/tube G5.
When the current flows at zero level, the switch tube G5 and the switch tube G6 are simultaneously switched on and off and are controlled by the same modulation signal.
When positive voltage is output, the switching tube G6 is switched on to carry out voltage-sharing clamping on the switching tubes G3 and G4, and the switching tube G5 is in a switching-off state; when the output negative level is normal, the switch tube G5 tube is connected and used for voltage-sharing clamping of the switch tube G1 and the switch tube G2 tube, and the switch tube G6 tube is in a turn-off state at the moment.
When positive/negative electricity is output, the switch tube G2/the switch tube G3 are always in a conducting state, and a follow current path is ensured.
The present invention will be described in detail with reference to specific examples.
Examples
According to the illustration in fig. 1, the modulation method of the invention is suitable for controlling the on and off of three-level topology ANPC6 power devices G1-switching tube G6 in the figure, thereby realizing power conversion. According to the three-level topology ANPC four-quadrant operation modulation method, when current flows in a zero-level state, the switching tube G5 and the switching tube G6 are turned on first, and current flows by using 1 short current-flowing path; then switch tube G2 and switch tube G3 are turned on, and 1 afterflow loop is additionally turned on. When outputting positive/negative voltage, the switch tube G6/switch tube G5 is switched on in time, and the voltages born by the switch tube G3, the switch tube G4/switch tube G1 and the switch tube G2 are reliably clamped.
According to fig. 2, the zero-level freewheeling can be divided into 4 operating conditions as shown. Wherein the positive half cycle of the voltage means that the voltage at the AC end of the output point is at a positive level V DC And zero level V AC Half power frequency period for/2 switchingInternal; the negative half cycle of the voltage means that the voltage at the AC end of the output point is at a negative level 0 and a zero level V AC Within half the power frequency period of the/2 switching. The positive half cycle of current means that current flows out of the AC end; the negative half cycle of current means that current flows from the AC terminal.
Under the working condition (1), when the voltage is positive, the half cycle and the current is positive, the current flows out according to the path of a solid line in the figure, when the switching tube G1 is turned off and enters a zero-level follow current state, the current can be automatically switched into the follow current loop 1, and the diode D5 is used for follow current of a short follow current path. After delaying a dead time, the switching tube G5 and the switching tube G6 are conducted, at the moment, the follow current loop 2 is additionally opened, namely, follow current flows through the switching tube G6 and the diode D3, two paths for follow current in a zero level state are guaranteed, and loss of each power device is balanced.
When the voltage is negative in the working condition (2) and the current is negative in the half cycle, the current firstly flows in according to the path of the solid line in the figure, when the switching tube G4 is turned off and enters a zero-level follow current state, the current can be automatically switched into the follow current loop 1, and the diode D5 is used for carrying out short follow current path follow current. After delaying a dead time, the switching tube G5 and the switching tube G6 are conducted, at the moment, the freewheeling circuit 2 can be additionally switched on, namely freewheeling is realized through the diode D2 and the switching tube G5, two paths for freewheeling in a zero level state are ensured, and the loss of each power device is balanced.
Under the working condition (3), when the voltage is positive, the half cycle and the current is negative, the current still flows into a positive bus from the diode D2 and the diode D1 freewheeling diode, the switch tube G5 and the switch tube G6 are conducted after a dead time is delayed, the current can be switched to the freewheeling circuit 1 and becomes the freewheeling of the diode D2 and the switch tube G5, and the current flows into a neutral point; and after delaying a dead time, the switching tube G2 and the switching tube G3 are conducted, at the moment, the freewheeling circuit 2 is additionally opened, namely freewheeling is realized through the switching tube G3 and the diode D6, two paths for freewheeling in a zero level state are ensured, and the loss of each power device is balanced.
When the voltage is negative and the half cycle current is positive and the half cycle is positive under the working condition (4), the current still flows out of the negative bus from the diode D4 and the diode D3 freewheeling diode, the switch tube G5 and the switch tube G6 are conducted after delaying a dead time, the current can be switched to the freewheeling circuit 1 and becomes the freewheeling of the switch tube G6 and the diode D3, and the current flows out of a neutral point; and after delaying a dead time, the switching tube G2 and the switching tube G3 are conducted, and at the moment, the freewheeling circuit 2 can be additionally switched on, namely freewheeling is realized through the diode D5 and the switching tube G2, so that two paths for freewheeling in a zero level state are ensured, and the loss of each power device is balanced.
As shown in fig. 3, when outputting positive/negative voltages, the switching tube G6/the switching tube G5 are respectively turned on to perform voltage-sharing clamping on the pressure-bearing power device.
When the positive voltage is output, the switch tube G1 and the switch tube G2 are conducted, and at the moment, the switch tube G3 and the switch tube G4 are connected in series to bear the full bus voltage V DC After the switching tube G1 and the switching tube G2 are conducted and delay a dead time, the switching tube G6 is switched on, and at the moment, the connection point of the switching tube G3 and the switching tube G4 is reliably clamped to the neutral point V DC And/2, sharing the bus voltage.
When the negative voltage is output, the switch tube G3 and the switch tube G4 are conducted, and at the moment, the switch tube G1 and the switch tube G2 are connected in series to bear the full bus voltage V DC After the switching tube G3 and the switching tube G4 are conducted and delay a dead time, the switching tube G5 is switched on, and at the moment, the connection point of the switching tube G1 and the switching tube G2 is reliably clamped to the neutral point V DC And/2, the bus voltage is divided equally.
Referring to fig. 4 and 5, when the voltage is positive for a half cycle, the switching tube G1, the switching tube G3, and the switching tube G5 are turned on and off at the switching frequency, the switching tube G1 is complementary to the switching tube G3 and the switching tube G5, and the turn-off of the switching tube G1 is different from the turn-on of the switching tube G5 by a dead time T D14 Switching-on of switching tube G5 differs from switching-on of switching tube G3 by a dead time T U23 The difference between the turn-off of the switching tube G3 and the turn-off of the switching tube G5 is a dead time T D23 The difference between the turn-off of the switching tube G5 and the turn-on of the switching tube G1 is a dead time T U14 . When positive voltage is output during the positive half cycle, the difference between the switching tube G6 and the switching tube G1 is in a dead time T between the switching tube G6 and the switching tube G1, and the switching tube G6 and the switching tube G1 are switched off clamp Similarly, the voltage is negative for half cycle, and is not described again.
All articles and references disclosed above, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified elements, components, parts or steps as well as other elements, components, parts or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not a disclaimer of such subject matter, nor is it to be construed that applicant does not consider such subject matter to be part of the disclosed inventive subject matter.
Claims (3)
1. A three-level topology ANPC four-quadrant operation modulation method is characterized in that,
the three-level topology ANPC comprises six power devices, wherein the six power devices respectively comprise a switching tube G1, a diode D1, a switching tube G2, a diode D2, a switching tube G3, a diode D3, a switching tube G4, a diode D4, a switching tube G5, a diode D5, a switching tube G6 and a diode D6;
starting zero-level follow current, and delaying a dead time T after the switching tube G1/the switching tube G4 is switched off 1 Firstly, switching on a switch tube G5 and a switch tube G6, when current flows through a diode D2 and a diode D1 to follow current to a positive bus, the follow current path is forced to change from the diode D2 and the diode D1 to the diode D2 and the switch tube G5, and the current flows to a neutral point; when current flows through the diode D4 and the diode D3 to follow current to the negative bus, the follow current path is forced to change from the diode D4 and the diode D3 into the switch tube G6 and the diode D3, and follow current to the neutral point; then delaying a dead time T 2 Switching on a switch tube G2 and a switch tube G3, additionally switching on a diode D5 and a switch tube G2, and switching on a switch tube G3 and a diode D6;
when zero level follow current is finished, the switching tube G2 and the switching tube G3 are turned off first, and a dead time T is delayed 3 Then switching off the switch tube G5 and the switch tube G6, and delaying for a dead time T 4 Then switching on the switch tube G1/switch tube G4, and quitting the zero level follow current state;
the zero level follow current can be divided into 4 working conditions, wherein the positive half cycle of the voltage refers to the half power frequency cycle in which the voltage of the AC end of the output point is switched between a positive level VDC and a zero level VAC/2; the negative half cycle of the voltage refers to the half power frequency cycle of the voltage of the AC end of the output point switching between the negative level 0 and the zero level VAC/2; the positive half cycle of current means that current flows out of the AC end; the negative half cycle of current means that current flows from the AC end;
under the working condition (1), when the voltage is positive and the current is positive and the switching tube G1 is turned off and enters a zero-level follow current state, the current can be automatically switched into a follow current loop 1, and a diode D5 follow current diode carries out short follow current path follow current; after delaying a dead time, the switching tube G5 and the switching tube G6 are conducted, at the moment, the follow current loop 2 is additionally opened, namely, follow current flows through the switching tube G6 and the diode D3, two paths in a zero level state are ensured to carry out follow current, and the loss of each power device is balanced;
when the voltage is negative for the half cycle and the current is negative for the half cycle under the working condition (2), when the switching tube G4 is turned off and enters a zero-level follow current state, the current can be automatically switched into the follow current loop 1, the diode D5 follow current diode carries out short follow current path follow current, the switching tube G5 and the switching tube G6 are conducted after a dead time is delayed, the follow current loop 2 can be additionally switched on at the moment, namely, the diode D2 and the switching tube G5 carry out follow current, two paths for follow current in the zero-level state are ensured, and the loss of each power device is balanced;
under the working condition (3), when the voltage is positive, the half cycle and the current is negative, the current still flows into a positive bus from the diode D2 and the diode D1 freewheeling diode, the switch tube G5 and the switch tube G6 are conducted after a dead time is delayed, the current can be switched to the freewheeling circuit 1 and becomes the freewheeling of the diode D2 and the switch tube G5, and the current flows into a neutral point; after delaying a dead time, the switching tube G2 and the switching tube G3 are conducted, at the moment, the follow current loop 2 is additionally opened, namely, follow current flows through the switching tube G3 and the diode D6, two paths in a zero level state are ensured to carry out follow current, and the loss of each power device is balanced;
when the voltage is negative and the half cycle current is positive and the half cycle is positive under the working condition (4), the current still flows out of the negative bus from the diode D4 and the diode D3 freewheeling diode, the switch tube G5 and the switch tube G6 are conducted after delaying a dead time, the current can be switched to the freewheeling circuit 1 and becomes the freewheeling of the switch tube G6 and the diode D3, and the current flows out of a neutral point; and after delaying a dead time, the switching tube G2 and the switching tube G3 are conducted, and at the moment, the freewheeling circuit 2 can be additionally switched on, namely freewheeling is realized through the diode D5 and the switching tube G2, so that two paths for freewheeling in a zero level state are ensured, and the loss of each power device is balanced.
2. The three-level topology ANPC four-quadrant operation modulation method of claim 1, in which the three-level topology ANPC comprises two capacitors and a plurality of power devices; two capacitors connected in series are arranged on the direct current side; the power device comprises a switching tube and an anti-parallel diode thereof; the first power device, the second power device, the third power device and the fourth power device are sequentially connected in series, the first power device is connected with the positive end of the first capacitor, and the fourth power device is connected with the negative end of the second capacitor; the fifth power device and the sixth power device are connected in series, the middle points of the fifth power device and the sixth power device are connected with the middle points of the two capacitors, and the fifth power device and the sixth power device are respectively connected with the middle points of the first power device and the second power device and the middle points of the third power device and the fourth power device; the middle points of the second power device and the third power device are connected with the AC end of the output point.
3. The three-level topology ANPC four-quadrant operation modulation method of claim 1, wherein the power device is an IGBT or a MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492095.5A CN112688584B (en) | 2020-12-15 | 2020-12-15 | Three-level topology ANPC four-quadrant operation modulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492095.5A CN112688584B (en) | 2020-12-15 | 2020-12-15 | Three-level topology ANPC four-quadrant operation modulation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112688584A CN112688584A (en) | 2021-04-20 |
| CN112688584B true CN112688584B (en) | 2022-12-30 |
Family
ID=75448520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011492095.5A Active CN112688584B (en) | 2020-12-15 | 2020-12-15 | Three-level topology ANPC four-quadrant operation modulation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112688584B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114400916B (en) * | 2022-01-18 | 2024-11-01 | 河北建投新能源有限公司 | Inverter modulation method and device, storage medium and electronic equipment |
| CN115473419A (en) * | 2022-10-12 | 2022-12-13 | 阳光电源股份有限公司 | Loss equalization modulation method and converter for ANPC topology |
| CN115579919A (en) * | 2022-11-22 | 2023-01-06 | 武汉新能源接入装备与技术研究院有限公司 | Flywheel energy storage system and method suitable for rail transit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681913A (en) * | 2017-09-29 | 2018-02-09 | 特变电工西安电气科技有限公司 | A kind of ANPC types three-level inverter modulator approach |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401455B (en) * | 2013-06-26 | 2015-06-17 | 山西潞安环保能源开发股份有限公司 | Modulation method for active neutral-point clamp type tri-level inverter |
| CN105186902B (en) * | 2015-09-10 | 2017-07-28 | 阳光电源股份有限公司 | A kind of ANPC types three-level inverter, modulator approach and electrical equipment |
| CN107888100B (en) * | 2016-09-30 | 2019-12-20 | 维谛技术有限公司 | Inverter, method for controlling inverter and control device |
| CN107968586B (en) * | 2017-12-27 | 2020-05-22 | 阳光电源股份有限公司 | Active clamp three-level circuit and direct current converter |
| CN109088559B (en) * | 2018-09-10 | 2021-01-08 | 浙江大学 | Modulation method applied to mixed active neutral point clamp type three-level converter |
| CN110798072B (en) * | 2019-10-21 | 2022-02-01 | 华中科技大学 | Modulation method and system of ANPC active bridge applied to DAB structure |
| CN110932580B (en) * | 2019-12-13 | 2021-04-13 | 阳光电源股份有限公司 | ANPC type three-level inverter and control method thereof |
-
2020
- 2020-12-15 CN CN202011492095.5A patent/CN112688584B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681913A (en) * | 2017-09-29 | 2018-02-09 | 特变电工西安电气科技有限公司 | A kind of ANPC types three-level inverter modulator approach |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112688584A (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102460932B (en) | Power conversion apparatus | |
| CN109861546B (en) | Power electronic transformer with true bipolar direct current output capability and application control | |
| CN112688584B (en) | Three-level topology ANPC four-quadrant operation modulation method | |
| CN107017781B (en) | ISOP full-bridge DC converter controlled by asymmetric PWM and its control method | |
| CN109391166A (en) | A kind of translation circuit, control method and power supply unit | |
| CN109951084B (en) | A high-power high-transformation ratio resonant DC power supply and its working method | |
| CN110798072B (en) | Modulation method and system of ANPC active bridge applied to DAB structure | |
| CN112865560B (en) | Multi-diode series back-to-back bridgeless three-level rectifier | |
| US9344004B2 (en) | Power conversion system | |
| CN107070287A (en) | Electric energy router and electric energy router submodule | |
| CN110768534B (en) | An isolated double half-bridge ANPC active bridge three-level DC/DC converter | |
| CN111030440A (en) | Single-phase two-tube five-level rectifier based on hybrid H-bridge | |
| CN107342698B (en) | A three-phase four-wire zero-voltage switching rectifier circuit with balanced bridge arms and its modulation method | |
| CN111682787A (en) | Single-stage three-phase AC-DC converter and method based on isolated converter module | |
| CN108173442A (en) | Isolated Modular Multilevel Converter Based on High Frequency Link Technology | |
| CN108471250B (en) | A five-level topology for power conversion systems | |
| CN112271746A (en) | Electrolytic capacitor-free MMC (modular multilevel converter) topological structure and control strategy for high-frequency chain interconnection | |
| CN113746361A (en) | AC-DC power conversion system with high voltage gain | |
| CN106130352A (en) | The micro-inverter of intermediate current type double tube positive exciting and numerical control device thereof | |
| CN110086360A (en) | A kind of five level high efficiency rectifiers | |
| CN113258804A (en) | Five-level photovoltaic inverter capable of reducing number of switching tubes and modulation method thereof | |
| CN110034686A (en) | Double active bridging parallel operations based on SiC-Si combined power semiconductor device switch | |
| CN113054861B (en) | A topology of series-connected MMC converters with a small number of modules | |
| CN101753053A (en) | Hybrid cascade multilevel converter | |
| CN112865563B (en) | Three-port clamping type back-to-back bridgeless three-level rectifier |
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 | ||
| CB02 | Change of applicant information |
Address after: 710003 Caotang science and technology industrial base, Xi'an high tech Zone, Shaanxi Province Applicant after: Xi'an Singularity Energy Co.,Ltd. Address before: 710003 Caotang science and technology industrial base, Xi'an high tech Zone, Shaanxi Province Applicant before: Xi'an Singularity Energy Technology Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |