CN109088558A - The novel nine electrical level inverters topological structure of one kind and control method - Google Patents
The novel nine electrical level inverters topological structure of one kind and control method Download PDFInfo
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- CN109088558A CN109088558A CN201811258578.1A CN201811258578A CN109088558A CN 109088558 A CN109088558 A CN 109088558A CN 201811258578 A CN201811258578 A CN 201811258578A CN 109088558 A CN109088558 A CN 109088558A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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Abstract
The invention belongs to power electronics fields, and in particular to the novel nine electrical level inverters topological structure of one kind and control method, including four derided capacitors, two switching groups, eight switching tubes, four derided capacitors constitute bleeder circuit, and two switching groups and eight switching tubes constitute inverter circuit；And by the conducting and shutdown of control switch group and switching tube, so that the inverter is exported nine level, and control according to certain on off sequence, make its output single-phase voltage waveform；Inverter topology in the present invention is superior to three kind of nine traditional level circuit in the quantitative aspects of switching device, diode, striding capacitance, and its control method is also relatively easy.
Description
Technical field
The invention belongs to power electronics fields, and in particular to the novel nine electrical level inverters topological structure of one kind and control
Method.
Background technique
Inverter is a kind of device (DC-AC) by DC conversion for alternating current, and traditional two-level inverter has
The advantages that main circuit is fairly simple, and control program is mature, and equipment cost is lower.But in the higher application of power level, meeting
There is single switch device voltage grade and is difficult to the problem of meeting system requirements.It in order to solve this problem, can be more by constructing
The thought of electrical level inverter meets the voltage stress requirement of switching device.
Multi-electrical level inverter be it is a kind of by improve current transformer itself topological structure come realize high-power output it is new
Type inverter.Relative to traditional two-level inverter, multi-electrical level inverter has the advantage that (1) each switching device is held
It is low by voltage.(2) theoretically the increase of level number can improve output voltage wave.(3) the identical DC voltage the case where
Under, relative to traditional two-level inverter, dv/dt is greatly reduced, and electromagnetic interference reduces.(4) the direct series connection of device is avoided
Etc..
Common multi-electrical level inverter topology mainly has diode clamp bit-type (NPC), Cascade H bridge type (CHB) and flies across electricity
Appearance type (FC), traditional multi-level converter topology structure device usage amount is more, control is complicated, while reducing the effect of inverter
Rate.Since basic multi-level converter topology structure is complicated, the comparison that active switch pipe and passive device use is more how
Simplify topological structure and simultaneously propose corresponding modulation strategy, to improve device performance, become research multi-electrical level inverter purpose it
One
Summary of the invention
In view of the shortcomings of the prior art, it is an object of the invention to propose a kind of novel nine electrical level inverters topological structure and
Control method, nine electrical level inverters in the present invention there is number of devices in terms of advantage and the simple advantage of control.
In order to solve the above technical problems, the present invention provides a kind of novel nine electrical level inverters topological structure, feature exists
In: including four derided capacitors, respectively first capacitor (C1), the second capacitor (C2), third capacitor (C3) and the 4th capacitor
(C4)；Two switching groups, respectively first switch group and second switch group, each switching group includes first end and second
End；Eight switching tubes, respectively first switch tube (S1), second switch (S2), third switching tube (S5), the 4th switching tube
(S6), the 5th switching tube (S9), the 6th switching tube (S10), the 7th switching tube (S11) and the 8th switching tube (S12), it is each described
Switching tube includes first end, second end and control terminal；The first end and DC power supply positive input terminal of the first capacitor (C1) connect
It connects, the second end of the first capacitor (C1) is connect with the first end of second capacitor (C2), second capacitor (C2)
Second end is connect with the first end of the third capacitor (C3), the second end of the third capacitor (C3) and the 4th capacitor
(C4) first end connection, the second end of the 4th capacitor (C4) are connect with DC power supply negative input end；First switch tube
(S1) first end is connect with the DC power supply positive input terminal, and the second end of the first switch tube (S1) is opened with described second
Close the first end connection of pipe (S2), the first end company of the second end of the second switch (S2) and the third switching tube (S5)
It connects, the first end of the third switching tube (S5) is connect with the first end of the 4th switching tube (S6), the 4th switching tube
(S6) second end is connect with the DC power supply negative input end, and the first end of the 5th switching tube (S9) is opened with described first
Close the second end connection of pipe (S1), the second end of the 5th switching tube (S9) and the first end of the 6th switching tube (S10)
Connection, the second end of the 6th switching tube (S10) are connect with the second end of the third switching tube (S5), the 7th switch
Pipe (S11) first end connect with the second end of the first switch tube (S1), the second end of the 7th switching tube (S11) and
The first end of 8th switching tube (S12) connects, the second end of the 8th switching tube (S12) and the third switching tube
(S5) second end connection；The first switch group is connected to the second end and the first switch tube of the first capacitor (C1)
(S1) between second end, the second switch group be connected to the third capacitor (C3) second end and the third switching tube
(S5) between second end；The second end of 5th switching tube (S9) is used as with the second end of the 7th diode (S11) and exchanges output
End.
Preferably, each switching tube is the switching tube with anti-parallel diodes.
Preferably, each switching group is two switching tube differential concatenation connections with anti-parallel diodes.
The invention also provides the control methods based on above-mentioned novel nine electrical level inverters topological structure, it is characterised in that:
The inverter topology is set to export nine different output levels from shutdown by the conducting of control switch component and switching tube；
Control the first switch tube (S1), the 5th switching tube (S9), the 8th switching tube (S12) and the 4th switching tube (S6)
Conducting the first level of output；
Control the first switch tube (S1), the 5th switching tube (S9), the 8th switching tube (S12) and the conducting of second switch group
Export second electrical level；
Control the first switch tube (S1), the 5th switching tube (S9), the 8th switching tube (S12) and third switching tube (S5)
Conducting output third level；
Control the first switch group, the 5th switching tube (S9), the 8th switching tube (S12) and third switching tube (S5) conducting
Export the 4th level；
Control the 6th switching tube (S10), the 8th switching tube (S12) conducting the 5th level of output；
The first switch group, the 7th switching tube (S11), the 6th switching tube (S10) and third switching tube (S5) is controlled to lead
The 6th level of logical output；
Control the second switch (S2), the 7th switching tube (S11), the 6th switching tube (S10) and the 4th switching tube
(S6) the 7th level of conducting output；
The first switch group, the 7th switching tube (S11), the 6th switching tube (S10) and the 4th switching tube (S6) is controlled to lead
The 8th level of logical output；
Control the first switch tube (S1), the 7th switching tube (S11), the 6th switching tube (S10) and the 4th switching tube
(S6) the 9th level of conducting output.
Compared with prior art, the present invention at least has the following beneficial effects or advantage:
This novel nine electrical level inverters topological structure provided by the invention relative to three kind of nine traditional electrical level inverter,
That is nine level NPC inverters, nine level CHB inverters, nine level FC inverters, the present invention in nine electrical level inverters have device
The advantage of part quantitative aspects.Inverter topology in the present invention switching device, diode, striding capacitance quantitative aspects
It is superior to three kind of nine traditional level circuit, and its control method is also relatively easy, therefore there is cost in practical applications
The advantage of aspect.
Detailed description of the invention
The present invention is described in further details below with reference to attached drawing；
Fig. 1 is the single-phase topology diagram of nine electrical level inverters of the invention；
Fig. 2 (a) -2 (i) is nine electrical level inverter guiding path figures of the invention；
Fig. 3 is nine electrical level inverter single-phase output voltage oscillograms of the invention；
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The present invention provides a kind of novel nine electrical level inverters topological structures, as shown in Figure 1, include four derided capacitors,
Respectively first capacitor C1, the second capacitor C2, third capacitor C3 and the 4th capacitor C4；Two switching groups, respectively first switch
Group and second switch group, each switching group includes first end and second end；Eight switching tubes, respectively first switch tube
S1, second switch S2, third switching tube S5, the 4th switching tube S6, the 5th switching tube S9, the 6th switching tube S10, the 7th switch
Pipe S11 and the 8th switching tube S12, each switching tube include first end, second end and control terminal；The first capacitor C1's
First end and DC power supply VDCPositive input terminal connection, the first end of the second end of the first capacitor C1 and the second capacitor C2
Connection, the second end of the second capacitor C2 are connect with the first end of the third capacitor C3, and the second of the third capacitor C3
End is connect with the first end of the 4th capacitor C4, and the second end of the 4th capacitor C4 is connect with DC power supply negative input end；
The first end of first switch tube S1 is connect with the DC power supply positive input terminal, the second end of the first switch tube S1 with it is described
The first end of second switch S2 connects, and the first end of the second end of the second switch S2 and the third switching tube S5 connect
It connects, the first end of the third switching tube S5 is connect with the first end of the 4th switching tube S6, the 4th switching tube S6's
Second end is connect with the DC power supply negative input end, and the first end of the 5th switching tube S9 is with the first switch tube S1's
Second end connection, the second end of the 5th switching tube S9 are connect with the first end of the 6th switching tube S10, and the described 6th opens
Close pipe S10 second end connect with the second end of the third switching tube S5, the first end of the 7th switching tube S11 with it is described
The second end of first switch tube S1 connects, the second end of the 7th switching tube S11 and the first end of the 8th switching tube S12
Connection, the second end of the 8th switching tube S12 are connect with the second end of the third switching tube S5；The first switch group connects
It is connected between the second end of the first capacitor C1 and the second end of the first switch tube S1, the second switch group is connected to
Between the second end of the third capacitor C3 and the second end of the third switching tube S5；The second end of 5th switching tube S9 and the
The second end of seven diode S11 is as ac output end.
Each switching tube is the switching tube with anti-parallel diodes.
Each switching group is two switching tube differential concatenation connections with anti-parallel diodes, as shown in Figure 1, opening
Close the connection of pipe S3, S4 differential concatenation and the connection of switching tube S7, S8 differential concatenation.
Nine electrical level inverters in the present invention have the advantage in terms of number of devices, wherein the number of devices pair of single-phase circuit
Than as shown in table 1.By comparison it can be found that inverter topology in the present invention in switching device, diode, fly across electricity
The quantitative aspects of appearance is superior to three kind of nine traditional level circuit, therefore in practical applications with the advantage in terms of cost.
Table 1: the present invention and traditional nine electrical level inverter monophase system number of devices compare
According to above-mentioned nine electrical level inverters topological structure, control principle and process are as follows:
By adjusting the conducting and shutdown of switching device, it is defeated that the inverter topology in the present invention can export 9 differences
Level out.When input direct-current voltage is 4E, the rated value of the capacitance voltage of each DC side is E, below with output voltage pair
The working principle of the topology is analyzed:
1, output level+4E: the driving signal of switching tube S1, S6, S9, S12 is enabled at this time, guiding path such as Fig. 2 (a) institute
Show.
2, output level+3E: system has two guiding paths at this time, can make the output level+3E of system, for
The driving signal of guiding path in Fig. 2 (b), switching tube S1, S7, S8, S9, S12 is enabled.
3, output level+2E: the driving signal of switching tube S1, S5, S9, S12 is enabled at this time, for the conducting in Fig. 2 (c)
Path,.
4, output level+E: the driving signal of switching tube S3, S4, S5, S9, S12 is enabled at this time.For leading in Fig. 2 (d)
Path.
5, output level 0: the driving signal of switching tube S10, S12 is enabled at this time, shown in guiding path such as Fig. 2 (e).
6, output level-E: the driving signal of switching tube S3, S4, S5, S10, S11 is enabled at this time, guiding path such as Fig. 2
(f) shown in.
7, output level -2E: the driving signal of switching tube S2, S6, S10, S11 is enabled at this time, guiding path such as Fig. 2 (g)
It is shown.
8, output level -3E: the driving signal of switching tube S3, S4, S6, S10, S11 is enabled at this time, guiding path such as Fig. 2
(h) shown in.
9, output level -4E: the driving signal of switching tube S1, S6, S10, S11 is enabled at this time, guiding path such as Fig. 2 (i)
It is shown.
For each guiding path, corresponding on off sequence is summarized as shown in table 2.It exports after filter filtering,
Sinusoidal voltage can be obtained.When direct current input is 800V, nine level waveforms of the topology single-phase output as shown in figure 3,
Demonstrate the feasibility of the topological structure.
Table 2: on off sequence corresponding to each guiding path
| No. | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 | S9 | S10 | S11 | S12 | Vo |
| a | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 4E |
| b | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 3E |
| c | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 2E |
| d | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | E |
| e | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0E |
| f | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | -E |
| g | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | -2E |
| h | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | -3E |
| i | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | -4E |
In conclusion nine electrical level inverter has the advantage in terms of number of devices, the inverter topology knot in the present invention
Structure is superior to three kind of nine traditional level circuit in the quantitative aspects of switching device, diode, striding capacitance, therefore is actually answering
With the advantage in terms of cost in, and its control process is simple.It is with a wide range of applications.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (4)
1. a kind of novel nine electrical level inverters topological structure, it is characterised in that: including four derided capacitors, respectively first capacitor
(C1), the second capacitor (C2), third capacitor (C3) and the 4th capacitor (C4)；Two switching groups, respectively first switch group and
Two switching groups, each switching group includes first end and second end；Eight switching tubes, respectively first switch tube (S1),
Two switching tubes (S2), third switching tube (S5), the 4th switching tube (S6), the 5th switching tube (S9), the 6th switching tube (S10),
Seven switching tubes (S11) and the 8th switching tube (S12), each switching tube include first end, second end and control terminal；Described
The first end of one capacitor (C1) is connect with DC power supply positive input terminal, the second end of the first capacitor (C1) and second electricity
Hold the first end connection of (C2), the second end of second capacitor (C2) is connect with the first end of the third capacitor (C3), institute
The second end for stating third capacitor (C3) is connect with the first end of the 4th capacitor (C4), the second end of the 4th capacitor (C4)
It is connect with DC power supply negative input end；The first end of first switch tube (S1) is connect with the DC power supply positive input terminal, described
The second end of first switch tube (S1) is connect with the first end of the second switch (S2), and the of the second switch (S2)
Two ends are connect with the first end of the third switching tube (S5), the first end of the third switching tube (S5) and the 4th switch
The first end connection of (S6) is managed, the second end of the 4th switching tube (S6) is connect with the DC power supply negative input end, described
The first end of 5th switching tube (S9) is connect with the second end of the first switch tube (S1), and the of the 5th switching tube (S9)
Two ends are connect with the first end of the 6th switching tube (S10), and the second end of the 6th switching tube (S10) is opened with the third
Close the second end connection of pipe (S5), the first end of the 7th switching tube (S11) and the second end of the first switch tube (S1)
Connection, the second end of the 7th switching tube (S11) are connect with the first end of the 8th switching tube (S12), and the described 8th opens
The second end for closing pipe (S12) is connect with the second end of the third switching tube (S5)；The first switch group is connected to described
Between the second end of one capacitor (C1) and the second end of the first switch tube (S1), the second switch group is connected to described
Between the second end of three capacitors (C3) and the second end of the third switching tube (S5)；The second end of 5th switching tube (S9) and the
The second end of seven diodes (S11) is as ac output end.
2. novel nine electrical level inverters topological structure according to claim 1, it is characterised in that: each switching tube is
Switching tube with anti-parallel diodes.
3. novel nine electrical level inverters topological structure according to claim 1, it is characterised in that: each switching group is
Two switching tube differential concatenation connections with anti-parallel diodes.
4. a kind of control method based on the described in any item novel nine electrical level inverters topological structures of preceding claims 1-3,
It is characterized by: the conducting and shutdown by control switch component and switching tube make the inverter topology export nine differences
Output level；
Control the first switch tube (S1), the 5th switching tube (S9), the 8th switching tube (S12) and the conducting of the 4th switching tube (S6)
Export the first level；
Control the first switch tube (S1), the 5th switching tube (S9), the 8th switching tube (S12) and the conducting output of second switch group
Second electrical level；
Control the first switch tube (S1), the 5th switching tube (S9), the 8th switching tube (S12) and third switching tube (S5) conducting
Export third level；
Control the first switch group, the 5th switching tube (S9), the 8th switching tube (S12) and third switching tube (S5) conducting output
4th level；
Control the 6th switching tube (S10), the 8th switching tube (S12) conducting the 5th level of output；
It is defeated to control the first switch group, the 7th switching tube (S11), the 6th switching tube (S10) and third switching tube (S5) conducting
6th level out；
The second switch (S2), the 7th switching tube (S11), the 6th switching tube (S10) and the 4th switching tube (S6) is controlled to lead
The 7th level of logical output；
It is defeated to control the first switch group, the 7th switching tube (S11), the 6th switching tube (S10) and the conducting of the 4th switching tube (S6)
8th level out；
The first switch tube (S1), the 7th switching tube (S11), the 6th switching tube (S10) and the 4th switching tube (S6) is controlled to lead
The 9th level of logical output.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109755960A (en) * | 2018-12-27 | 2019-05-14 | 西安交通大学 | A kind of nine electrical level inverter topological structure of single-phase grid-connected switching capacity |
| CN110535366A (en) * | 2019-07-01 | 2019-12-03 | 山东大学 | Seven level converters of one kind and its striding capacitance voltage control method, system |
| CN111030490A (en) * | 2019-12-18 | 2020-04-17 | 南京理工大学 | Nine-level inverter of boost type switched capacitor |
| CN111049403A (en) * | 2019-12-18 | 2020-04-21 | 南京理工大学 | Nine-level inverter of buck-boost type switched capacitor |
| US11336203B2 (en) | 2018-09-07 | 2022-05-17 | Socovar S.E.C. | Multilevel electric power converter |
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| US11336203B2 (en) | 2018-09-07 | 2022-05-17 | Socovar S.E.C. | Multilevel electric power converter |
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| CN111049403A (en) * | 2019-12-18 | 2020-04-21 | 南京理工大学 | Nine-level inverter of buck-boost type switched capacitor |
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Effective date of registration: 20190211 Address after: 210029 Jiangsu Province Nanjing Shanghai Road 215 State Grid Jiangsu Electric Power Co., Ltd. Applicant after: State Grid Jiangsu Electric Power Co., Ltd. Applicant after: Nantong power supply branch, Jiangsu Electric Power Co., Ltd. Address before: 226006 Nantong Power Supply Branch of Jiangsu Electric Power Co., Ltd. No. 52 Youth Middle Road, Chongchuan District, Nantong City, Jiangsu Province Applicant before: Nantong power supply branch, Jiangsu Electric Power Co., Ltd. |
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Application publication date: 20181225 |