CN115800785A - Single-phase three-level four-port clamping type energy storage inverter - Google Patents
Single-phase three-level four-port clamping type energy storage inverter Download PDFInfo
- Publication number
- CN115800785A CN115800785A CN202211400192.6A CN202211400192A CN115800785A CN 115800785 A CN115800785 A CN 115800785A CN 202211400192 A CN202211400192 A CN 202211400192A CN 115800785 A CN115800785 A CN 115800785A
- Authority
- CN
- China
- Prior art keywords
- switch tube
- energy storage
- voltage
- current
- capacitor
- 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.)
- Granted
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 65
- 239000003990 capacitor Substances 0.000 claims abstract description 46
- 230000002457 bidirectional effect Effects 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 5
- 230000005669 field effect Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect 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
A single-phase three-level four-port clamping type energy storage inverter comprises a switching tube S 1 、S 2 、S 3 、S 4 、S 5 、S 6 、S 7 、S 8 Diode D 1 、D 2 、D 3 Inductance L 1 And L 2 Capacitor C 1 And C 2 Wherein the switch tube S 2 、S 4 、S 5 And a diode D 1 、D 3 The structure can clamp the voltage of a capacitor and increase the power circulation path, and meanwhile, the structure can also be used as a modular unit, so that the integration is convenient to realize. Compared with a two-level inverter, the inverter provided by the invention has the advantages that the switching stress born by a semiconductor device is reduced, the switching loss and the output harmonic content are reduced, and the output electric energy quality and the system efficiency are improved.
Description
Technical Field
The invention relates to the field of power electronic electric energy conversion, in particular to a single-phase three-level four-port clamping type energy storage inverter.
Background
The energy storage inverter is used as a core component of the micro-grid energy storage system, and has important significance for improving the grid-connected power generation capability of the intermittent new energy. The inverter used in the traditional energy storage inverter is mainly a two-level inverter, although the two-level inverter is simple to control and mature in scheme, a switching device needs to bear all direct-current side voltage, the switching device is high in voltage resistance, the application of the switching device in high-voltage and high-power occasions is severely limited, the output harmonic content is high, and the improvement of the output electric energy quality is not facilitated.
The three-level inverter is applied to overcome the defects of the two-level inverter, and compared with the two-level inverter, the three-level inverter greatly reduces the voltage stress borne by a single switching device, is favorable for the type selection of a switching tube, simultaneously reduces the output harmonic content and the switching loss, and improves the output electric energy quality and the system efficiency.
Disclosure of Invention
Compared with the traditional two-level inverter, the single-phase three-level four-port clamping type energy storage inverter provided by the invention has the advantages that the voltage stress borne by a switching device is reduced, the service life of the switching device is prolonged, the switching loss and the output harmonic content are reduced, and the electric energy conversion efficiency and the output electric energy quality are improved.
The technical scheme adopted by the invention is as follows:
a single-phase three-level four-port clamping type energy storage inverter comprises a switching tube S 1 、S 2 、S 3 、S 4 、S 5 、S 6 、S 7 、S 8 Diode D 1 、D 2 、D 3 Inductance L 1 、L 2 Capacitor C 1 、C 2 ；
Capacitor C 1 The positive pole is connected with a switch tube S 1 A drain electrode, the connection node of which constitutes an end point p;
capacitor C 2 Negative pole connecting switch tube S 8 A source electrode, the connection node of which forms an endpoint m;
capacitor C 1 The negative electrodes are respectively connected with a capacitor C 2 Positive electrode, switch tube S 5 A source connected to the node to form a terminal n;
switch tube S 8 The drain electrodes are respectively connected with a switch tube S 6 Source electrode, switch tube S 7 Source, diode D 1 Anode, diode D 2 An anode, the connection node of which constitutes an end point d;
switch tube S 1 The source electrodes are respectively connected with a switch tube S 2 Drain electrode, switching tube S 3 A drain connected to the node to form an end point c;
switch tube S 3 The source electrodes are respectively connected with two polesPipe D 2 Cathode, inductance L 2 The other end is connected with the node to form an end point b;
diode D 3 Cathode connection inductor L 1 One end, which is connected with the node to form an end point a;
switch tube S 4 Source electrodes respectively connected with the diodes D 1 Cathode, diode D 3 Connecting the anodes;
switch tube S 5 The drain electrodes are respectively connected with the switch tube S 2 Source electrode, switch tube S 4 The drain electrodes are connected;
switch tube S 6 Drain electrodes are respectively connected with the inductor L 1 The other end, load R L One end is connected;
switch tube S 7 Drain electrodes are respectively connected with the inductor L 2 One end, load R L The other ends are connected.
In the energy storage inverter, a switching tube S 2 And a switch tube S 4 Switch tube S 5 Diode D 1 And a diode D 3 The four ports are respectively a port a, a port c, a port d and a port n. The four-port structure clamps capacitor voltage, increases a power circulation path in a circuit and ensures the realization of the three-level function of the circuit.
In the energy storage inverter, a switching tube S 1 ～S 8 Either power field effect transistors MOSFETs with body diodes or insulated gate bipolar transistors IGBTs.
In the energy storage inverter, a terminal p and a terminal m are connected with the output side of the bidirectional DC-DC converter, and the input side of the bidirectional DC-DC converter is connected with an energy storage battery.
In the energy storage inverter, a capacitor C 1 、C 2 Each capacitor bears the direct current voltage U at the output side of the bidirectional DC-DC converter s And half of the voltage, provides conditions for realizing the three-level function of the circuit.
When the energy storage inverter normally works, the energy storage inverter comprises the following six working modes:
the first working mode is as follows: switch tube S 1 、S 2 、S 4 、S 7 、S 8 And the other switching tubes are switched on and switched off. Energy storage battery pair inductor L 1 And a load R L Power supply, inductance L 1 Current i L1 Linearly rising, at which time the output voltage u o >0, output current i o ＝i L1 Voltage u between the terminals a and b ab ＝+U s 。
The second working mode is as follows: switch tube S 4 、S 7 、S 8 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 1 Charging, capacitance C 1 Voltage rise, capacitance C 2 To the inductance L 1 And a load R L Supply, capacitor C 2 Voltage drop, inductance L 1 Current i L1 Linearly rising, at which time the output voltage u o >0, output current i o ＝i L1 Voltage u between the terminals a and b ab ＝+1/2U s 。
The working mode is three: switch tube S 7 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 1 And C 2 Charging, capacitance C 1 And C 2 The voltage of (2) rises. In this mode, the inductor L cannot change suddenly due to the inductor current 1 Current i L1 Via diode D 1 Follow current and be load R L Supply of current i L1 The linearity decreases. At this time, the output voltage u o >0, output current i o ＝i L1 Voltage u between the terminals a and b ab ＝0。
Working mode four: switch tube S 6 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 1 And C 2 Charging, capacitance C 1 And C 2 The voltage of (2) rises. In this mode, the inductor L cannot change suddenly due to the inductor current 2 Current i L2 Via diode D 2 Follow current and be load R L Supply of current i L2 The linearity decreases. At this time, the output voltage u o <0, output current i o ＝-i L2 Voltage u between the terminals a and b ab ＝0。
Working mode five: switch tube S 1 、S 3 、S 5 、S 6 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 2 Charging, capacitance C 2 Rise in voltage, capacitance C 1 To the inductance L 2 And a load R L Supply, capacitor C 1 Voltage drop, inductance L 2 Current i L2 Rises linearly, at which point the output voltage u o <0, output current i o ＝-i L2 Voltage u between the terminals a and b ab ＝-1/2U s 。
The working mode is six: switch tube S 1 、S 3 、S 6 、S 8 And the other switching tubes are switched on and switched off. Energy storage battery pair inductor L 2 And a load R L Power supply, inductance L 2 Current i L2 Rises linearly, at which point the output voltage u o <0, output current i o ＝-i L2 Voltage u between the terminals a and b ab ＝-U s 。
The invention discloses a single-phase three-level four-port clamping type energy storage inverter, which has the following technical effects:
1) The single-phase three-level four-port clamping type energy storage inverter adopts a four-port structure, the structure can clamp capacitor voltage, an additional power circulation path can be provided, the three-level function of the inverter is guaranteed, and meanwhile the structure can be packaged into a module unit, so that the integrated design is facilitated.
2) The single-phase three-level four-port clamping type energy storage inverter has six working modes, and the six working modes are switched according to a set rule through PWM control, so that a circuit realizes DC-AC electric energy conversion, and a three-level function is realized.
3) Compared with the traditional two-level inverter, the single-phase three-level four-port clamping type energy storage inverter reduces the switching loss, reduces the voltage stress born by a semiconductor device, and reduces the output harmonic content.
4) The invention relates to a single-phase three-level four-port clamping type energy storage inverter, which adopts a switching tube S 1 And a switching tube S 8 Clamping the DC voltage at the input sideThe operational reliability of the inverter is improved.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a main topology structure diagram of a single-phase three-level four-port clamped energy storage inverter of the present invention.
Fig. 2 is a schematic diagram of a working mode of a single-phase three-level four-port clamped energy storage inverter according to the present invention;
fig. 3 is a schematic diagram of a second working mode of a single-phase three-level four-port clamped energy storage inverter according to the present invention;
fig. 4 is a three-schematic diagram of a working mode of a single-phase three-level four-port clamp-type energy storage inverter according to the present invention;
fig. 5 is a four schematic diagrams of the working modes of a single-phase three-level four-port clamp type energy storage inverter according to the present invention;
fig. 6 is a five schematic diagram of the working mode of a single-phase three-level four-port clamp type energy storage inverter according to the present invention;
fig. 7 is a six schematic diagram of the working mode of a single-phase three-level four-port clamp-type energy storage inverter according to the present invention.
FIG. 8 shows a switch S of the circuit of the present invention 1 ～S 8 Six working mode diagrams.
FIG. 9 shows a switch S of the circuit of the present invention 1 ～S 8 Corresponding pulse signal distribution diagram.
FIG. 10 shows the output voltage u of the circuit of the present invention in steady state o And an output current i o And (4) waveform diagrams.
FIG. 11 shows the current flowing through the inductor L in the steady state of the circuit of the present invention 1 Current i L1 And (4) waveform diagrams.
FIG. 12 shows the current flowing through the inductor L in the steady state of the circuit of the present invention 2 Current i L2 And (4) waveform diagrams.
FIG. 13 shows the voltage u between the node a and the node b in the steady state of the circuit of the present invention ab And (4) waveform diagrams.
FIG. 14 shows the capacitance C of the circuit of the present invention in steady state 1 、C 2 Voltage u c1 、u c2 And (4) waveform diagrams.
Detailed Description
As shown in fig. 1, a single-phase three-level four-port clamping type energy storage inverter includes: energy storage battery, bidirectional DC-DC converter, switching tube S 1 、S 2 、S 3 、S 4 、S 5 、S 6 、S 7 、S 8 Diode D 1 、D 2 、D 3 Inductance L 1 And L 2 Capacitor C 1 And C 2 ；
Capacitor C 1 The positive pole is connected with a switch tube S 1 A drain connected to a node to form an end point p;
capacitor C 2 Negative pole connecting switch tube S 8 A source connected to the node to form a terminal m;
capacitor C 1 The negative electrodes are respectively connected with a capacitor C 2 Anode, switch tube S 5 A source connected to the node to form a terminal n;
switch tube S 8 The drain electrodes are respectively connected with a switch tube S 6 Source electrode, switch tube S 7 Source, diode D 1 Anode, diode D 2 An anode, the connection node of which constitutes an end point d;
switch tube S 1 The source electrodes are respectively connected with a switch tube S 2 Drain electrode, switching tube S 3 A drain connected to the node to form an end point c;
switch tube S 3 The source electrodes are respectively connected with a diode D 2 Cathode, inductance L 2 The other end is connected with the node to form an end point b;
diode D 3 Cathode connection inductor L 1 One end, the connection node of which forms an endpoint a;
switch tube S 4 Source electrodes respectively connected with the diodes D 1 Cathode, diode D 3 Connecting the anodes;
switch tube S 5 Drain electrodes of the two transistors are respectively connected with the switch tube S 2 Source electrode, switch tube S 4 The drain electrodes are connected;
switch tube S 6 Drain electrodes are respectively connected with the inductor L 1 The other end, load R L One end is connected;
switch with a switch bodyPipe S 7 Drain electrodes are respectively connected with the inductor L 2 One end, load R L The other ends are connected.
All switch tubes in the energy storage inverter circuit are power field effect transistors (MOSFET) or Insulated Gate Bipolar Transistors (IGBT) with diodes.
The four-port structure in the energy storage inverter circuit is composed of an end point a, an end point c, an end point d and an end point n, and the structure can be used as a modular three-level unit.
Capacitor C in the energy storage inverter circuit 1 And C 2 Two electrolytic capacitors of equal value, each capacitor is respectively subjected to the voltage of U s /2 for achieving. + -.1/2U s The level changes.
The circuit of the invention has the following specific experimental parameters:
direct-current voltage U at output side of bidirectional DC-DC converter s 400V, inductance L 1 And an inductance L 1 Are all 3mH, a capacitor C 1 And a capacitor C 2 Are all 4700 muF, the switching frequency is 20kHz, and the load R L Has a resistance value of 80 omega, and an output side AC voltage u o The effective value is 220V, and the frequency is 50Hz.
A single-phase three-level four-port clamping type energy storage inverter has the following six working modes when a circuit works normally:
fig. 2 shows a first operating mode: switch tube S 1 、S 2 、S 4 、S 7 、S 8 And the other switching tubes are switched on and switched off. Energy storage battery pair inductor L 1 And a load R L Power supply, inductance L 1 Current i L1 Linearly rising, at which time the output voltage u o >0, output current i o ＝i L1 Voltage u between the terminals a and b ab ＝+U s 。
Fig. 3 shows a second operating mode: switch tube S 4 、S 7 、S 8 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 1 Charging, capacitance C 1 Rise in voltage, capacitance C 2 To the inductance L 1 And a load R L Supply, capacitor C 2 Voltage drop, inductance L 1 Current i L1 Rises linearly, at which point the output voltage u o >0, output current i o ＝i L1 Voltage u between terminal a and terminal b ab ＝+1/2U s 。
Fig. 4 shows a third operating mode: switch tube S 7 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 1 And C 2 Charging, capacitance C 1 And C 2 The voltage of (2) rises. In this mode, the inductor L cannot change suddenly due to the inductor current 1 Current i L1 Via diode D 1 Follow current and are the load R L Supply of current i L1 The linearity decreases. At this time, the output voltage u o >0, output current i o ＝i L1 Voltage u between the terminals a and b ab ＝0。
Fig. 5 shows a fourth operating mode: switch tube S 6 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 1 And C 2 Charging, capacitance C 1 And C 2 The voltage of (2) rises. In this mode, the inductor L cannot change suddenly due to the inductor current 2 Current i L2 Via diode D 2 Follow current and are the load R L Supply of current i L2 The linearity decreases. At this time, the output voltage u o <0, output current i o ＝-i L2 Voltage u between terminal a and terminal b ab ＝0。
Fig. 6 shows a fifth mode of operation: switch tube S 1 、S 3 、S 5 、S 6 And the other switching tubes are switched on and switched off. Energy storage battery pair capacitor C 2 Charging, capacitance C 2 Rise in voltage, capacitance C 1 To the inductance L 2 And a load R L Supply, capacitor C 1 Voltage drop, inductance L 2 Current i L2 Linearly rising, at which time the output voltage u o <0, output current i o ＝-i L2 Voltage u between terminal a and terminal b ab ＝-1/2U s 。
Fig. 7 shows a sixth operating mode: switch tube S 1 、S 3 、S 6 、S 8 And the other switching tubes are switched on and switched off. Energy storage battery pair inductor L 2 And a load R L Power supply, inductance L 2 Current i L2 Linearly rising, at which time the output voltage u o <0, output current i o ＝-i L2 Voltage u between the terminals a and b ab ＝-U s 。
FIG. 8 shows a switch S of the circuit of the present invention 1 ～S 8 Six working mode diagrams, wherein the conducting and the off states of the switching tube are respectively represented by '1' and '0'. As can be seen from FIG. 8, when the output voltage u is applied o >At 0, the voltage u between the terminal a and the terminal b ab With + U s 、+1/2U s 0, when the output voltage u is in three states o <At 0, the voltage u between the terminal a and the terminal b ab Has a-U s 、-1/2U s And 0, three states. The working mode of the switching circuit is controlled through PWM, namely the on-off state of each switching tube is changed, and three levels are realized.
FIG. 9 shows a switch S of the circuit of the present invention 1 ～S 8 Corresponding pulse signal distribution diagram according to voltage u ab The variation rule of (2) divides the voltage into 4 small intervals, wherein the interval 1, the interval 2, the interval 3 and the interval 4 respectively represent the voltage u ab At [0, +1/2U s ]、[+1/2U s ,+U s ]、[-1/2U s ,0]、[-U s ,-1/2U s ]When changed internally, the switch tube S 1 ～S 8 A pulse signal distribution condition. In a working cycle, according to the sequence [ interval 1 ]]→ interval 2]→ interval 1]→ interval 3]→ [ interval 4]→ [ interval 3]To distribute the pulse signal of each switch tube, the voltage u can be set ab Is three-level.
FIG. 10 shows the output voltage u of the circuit of the present invention in steady state o And an output current i o Waveform diagram in which the voltage u is observed better o And current i o The relationship between i and i o The gain is multiplied by 10 times on the original basis. As can be seen from FIG. 10, the voltage u o And current i o The waveforms of (2) all have good sinusoid.
FIG. 11 shows the current flowing through the inductor L in the steady state of the circuit of the present invention 1 Current i L1 Waveform diagram, as can be seen from FIG. 11, the inductance L 1 Current is passed during the positive half of the duty cycle,no current passes during the negative half of the duty cycle, consistent with theoretical analysis.
FIG. 12 shows the current flowing through the inductor L in the steady state of the circuit of the present invention 2 Current i L2 Waveform diagram, as can be seen from FIG. 12, the inductance L 2 And current passes in the negative half working period, and no current passes in the positive half working period, which is consistent with theoretical analysis.
FIG. 13 shows the voltage u between the node a and the node b in the steady state of the circuit of the present invention ab Waveform diagram, as can be seen from FIG. 13, the voltage u ab The waveform accords with the working characteristics of a three-level circuit, and the circuit can realize the three-level function.
FIG. 14 shows the capacitance C of the circuit of the present invention in steady state 1 、C 2 Voltage u c1 、u c2 Waveform diagram, as can be seen from FIG. 14, the voltage u c1 And u c2 Dynamic balance is kept near 200V, which shows that the circuit of the invention can realize self balance of capacitance and voltage.
Claims (6)
1. A single-phase three-level four-port clamping type energy storage inverter comprises a switching tube S 1 、S 2 、S 3 、S 4 、S 5 、S 6 、S 7 、S 8 Diode D 1 、D 2 、D 3 Inductance L 1 、L 2 Capacitor C 1 、C 2 (ii) a The method is characterized in that:
capacitor C 1 The positive pole is connected with a switch tube S 1 A drain electrode, the connection node of which constitutes an end point p;
capacitor C 2 Negative pole connecting switch tube S 8 A source connected to the node to form a terminal m;
capacitor C 1 The negative electrodes are respectively connected with a capacitor C 2 Positive electrode, switch tube S 5 A source connected to the node to form a terminal n;
switch tube S 8 The drain electrodes are respectively connected with a switch tube S 6 Source electrode, switch tube S 7 Source, diode D 1 Anode, diode D 2 An anode connected to the node to form an end d;
switch tube S 1 The source electrodes are respectively connected with a switch tube S 2 Drain electrode, switching tube S 3 A drain connected to the node to form an end point c;
switch tube S 3 The source electrodes are respectively connected with a diode D 2 Cathode, inductor L 2 The other end is connected with the node to form an end point b;
diode D 3 Cathode connection inductor L 1 One end, the connection node of which forms an endpoint a;
switch tube S 4 Source electrodes respectively connected with the diodes D 1 Cathode, diode D 3 Connecting the anodes;
switch tube S 5 The drain electrodes are respectively connected with the switch tube S 2 Source electrode, switch tube S 4 The drain electrodes are connected;
switch tube S 6 Drain electrodes are respectively connected with the inductor L 1 The other end, load R L One end is connected;
switch tube S 7 Drain electrodes are respectively connected with the inductor L 2 One end, load R L The other ends are connected.
2. The single-phase three-level four-port clamping type energy storage inverter according to claim 1, wherein: in the energy storage inverter, a switching tube S 2 Switch tube S 4 And a switch tube S 5 Diode D 1 And a diode D 3 The four ports are respectively a port a, a port c, a port d and a port n.
3. The single-phase three-level four-port clamped energy storage inverter according to claim 1, wherein: in the energy storage inverter, a switching tube S 1 ～S 8 Either power field effect transistors MOSFETs with body diodes or insulated gate bipolar transistors IGBTs.
4. The single-phase three-level four-port clamping type energy storage inverter according to claim 1, wherein: in the energy storage inverter, a terminal p and a terminal m are connected with the output side of the bidirectional DC-DC converter, and the input side of the bidirectional DC-DC converter is connected with an energy storage battery.
5. The single-phase three-level four-port clamped energy storage inverter according to claim 4, wherein: in the energy storage inverter, a capacitor C 1 、C 2 Each capacitor bears the direct current voltage U at the output side of the bidirectional DC-DC converter s Half of that.
6. The single-phase three-level four-port clamp-type energy storage inverter according to any one of claims 1 to 5, wherein: when the energy storage inverter normally works, the energy storage inverter comprises the following six working modes:
the first working mode is as follows: switch tube S 1 、S 2 、S 4 、S 7 、S 8 Conducting, and turning off the other switching tubes; energy storage battery pair inductor L 1 And a load R L Power supply, inductance L 1 Current i L1 Linearly rising, at which time the output voltage u o >0, output current i o ＝i L1 Voltage u between the terminals a and b ab ＝+U s ；
And a second working mode: switch tube S 4 、S 7 、S 8 Conducting, and turning off the other switching tubes; energy storage battery pair capacitor C 1 Charging, capacitance C 1 Rise in voltage, capacitance C 2 To the inductance L 1 And a load R L Power supply, capacitor C 2 Voltage drop, inductance L 1 Current i L1 Linearly rising, at which time the output voltage u o >0, output current i o ＝i L1 Voltage u between terminal a and terminal b ab ＝+1/2U s ；
The working mode is three: switch tube S 7 Conducting, and turning off the other switching tubes; energy storage battery pair capacitor C 1 And C 2 Charging, capacitance C 1 And C 2 Voltage rise of (3); in this mode, the inductor L cannot change suddenly due to the inductor current 1 Current i L1 Via diode D 1 Follow current and be load R L Supply of current i L1 The linear decrease; at this time, the output voltage u o >0, output current i o ＝i L1 Voltage u between terminal a and terminal b ab ＝0；
Working mode four: switch tube S 6 Conducting, and turning off the other switching tubes; energy storage battery pair capacitor C 1 And C 2 Charging, capacitance C 1 And C 2 Voltage rise of (3); in this mode, the inductor L cannot change suddenly due to the inductor current 2 Current i L2 Via diode D 2 Follow current and be load R L Supply current i L2 Linearly decreasing; at this time, the output voltage u o <0, output current i o ＝-i L2 Voltage u between the terminals a and b ab ＝0；
Working mode five: switch tube S 1 、S 3 、S 5 、S 6 Conducting, and turning off the other switching tubes; energy storage battery pair capacitor C 2 Charging, capacitance C 2 Rise in voltage, capacitance C 1 To the inductance L 2 And a load R L Supply, capacitor C 1 Voltage drop, inductance L 2 Current i L2 Linearly rising, at which time the output voltage u o <0, output current i o ＝-i L2 Voltage u between the terminals a and b ab ＝-1/2U s ；
The working mode is six: switch tube S 1 、S 3 、S 6 、S 8 Conducting, and turning off the other switching tubes; energy storage battery pair inductor L 2 And a load R L Power supply, inductance L 2 Current i L2 Rises linearly, at which point the output voltage u o <0, output current i o ＝-i L2 Voltage u between terminal a and terminal b ab ＝-U s 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400192.6A CN115800785B (en) | 2022-11-09 | 2022-11-09 | Single-phase three-level four-port clamp type energy storage inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400192.6A CN115800785B (en) | 2022-11-09 | 2022-11-09 | Single-phase three-level four-port clamp type energy storage inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115800785A true CN115800785A (en) | 2023-03-14 |
| CN115800785B CN115800785B (en) | 2024-02-13 |
Family
ID=85436397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211400192.6A Active CN115800785B (en) | 2022-11-09 | 2022-11-09 | Single-phase three-level four-port clamp type energy storage inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115800785B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005246A (en) * | 2007-01-15 | 2007-07-25 | 南京航空航天大学 | Three level double voltage reducing type semi-bridge converter |
| CN102624267A (en) * | 2012-03-27 | 2012-08-01 | 阳光电源股份有限公司 | Inverter and application circuit in three-phase system |
| CN103178736A (en) * | 2013-03-22 | 2013-06-26 | 阳光电源股份有限公司 | Five-level inverter |
| US20150214859A1 (en) * | 2014-01-29 | 2015-07-30 | Delta Electronics, Inc. | Power conversion system and method of operating the same |
| CN107204719A (en) * | 2017-04-11 | 2017-09-26 | 江苏大学 | It is used for the inverter topology circuit and its control method for suppressing leakage current in photovoltaic parallel in system |
| CN108964502A (en) * | 2018-09-30 | 2018-12-07 | 华南理工大学 | A kind of single-phase non-isolated active clamp MOSFET inverter |
-
2022
- 2022-11-09 CN CN202211400192.6A patent/CN115800785B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005246A (en) * | 2007-01-15 | 2007-07-25 | 南京航空航天大学 | Three level double voltage reducing type semi-bridge converter |
| CN102624267A (en) * | 2012-03-27 | 2012-08-01 | 阳光电源股份有限公司 | Inverter and application circuit in three-phase system |
| CN103178736A (en) * | 2013-03-22 | 2013-06-26 | 阳光电源股份有限公司 | Five-level inverter |
| US20150214859A1 (en) * | 2014-01-29 | 2015-07-30 | Delta Electronics, Inc. | Power conversion system and method of operating the same |
| CN107204719A (en) * | 2017-04-11 | 2017-09-26 | 江苏大学 | It is used for the inverter topology circuit and its control method for suppressing leakage current in photovoltaic parallel in system |
| CN108964502A (en) * | 2018-09-30 | 2018-12-07 | 华南理工大学 | A kind of single-phase non-isolated active clamp MOSFET inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115800785B (en) | 2024-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111030440B (en) | Single-phase two-tube five-level rectifier based on hybrid H bridge | |
| CN112910244B (en) | Single-phase three-level power factor correction circuit of hybrid bridge arm | |
| CN112865567B (en) | Heterogeneous diode clamping type three-level rectifier | |
| CN112865587B (en) | Single-phase three-level rectifier of double-barrelled T type bridge | |
| CN112865560B (en) | Multi-diode series back-to-back bridgeless three-level rectifier | |
| CN111416534A (en) | Current path reconstruction type single-phase five-level rectifier | |
| CN112865569A (en) | Single-phase three-level rectifier of mixed T-shaped bridge | |
| CN112865565A (en) | Double-switch three-level rectifier of symmetrical T-shaped bridge | |
| CN115765507A (en) | Three-level double-step-down conversion circuit for energy storage and inversion integrated device rear stage | |
| CN112701905B (en) | Single-phase three-level power factor correction circuit based on pseudo totem-pole structure | |
| CN112865562B (en) | Single-phase three-switch tube pseudo-totem-pole type three-level rectifier | |
| CN115800785B (en) | Single-phase three-level four-port clamp type energy storage inverter | |
| CN113193768B (en) | Four-switch-tube series-type back-to-back three-level rectifier | |
| CN113437884B (en) | Three-level rectifier based on parallel diode clamp bidirectional switch | |
| CN112865563B (en) | Three-port clamping type back-to-back bridgeless three-level rectifier | |
| CN113437882A (en) | Three-level rectifier based on parallel multi-diode series bidirectional switch | |
| CN112910243B (en) | Single-phase three-level pseudo-totem-pole power factor correction circuit | |
| CN112865508A (en) | Single-phase three-level power factor correction circuit of novel asymmetric T-shaped bridge | |
| CN113206600B (en) | Single-phase three-level pseudo totem pole type direct current charger | |
| CN113206601B (en) | Direct current charger based on single-phase II type three-level pseudo totem pole | |
| CN113206602B (en) | DC charger based on single-phase grid three-level pseudo totem pole | |
| CN112865566B (en) | Single-phase three-level rectifier with three switching tubes | |
| CN115800787A (en) | Single-phase three-level asymmetric four-port energy storage inverter | |
| CN113206599B (en) | Diode bridge arm parallel three-level rectifying charger | |
| CN115800786A (en) | Single-phase three-level double-buck energy storage inverter circuit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |