CN108123612A - A kind of five-level converter control system based on three-level topology circuit - Google Patents
A kind of five-level converter control system based on three-level topology circuit Download PDFInfo
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- CN108123612A CN108123612A CN201611074236.5A CN201611074236A CN108123612A CN 108123612 A CN108123612 A CN 108123612A CN 201611074236 A CN201611074236 A CN 201611074236A CN 108123612 A CN108123612 A CN 108123612A
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- level
- control system
- frequency
- topology circuit
- bridge
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Abstract
A kind of five-level converter control system based on three-level topology circuit, suitable for frequency control field.The mixed type frequency converter that H bridge inverters are combined by frequency converter control system with neutral-point-clamped type three-level converter is mainly made of five-level converter, H bridge cascade connection multi-levels frequency converter, varying frequency starting experimental system.A kind of mixed type frequency converter for being combined H bridge inverters with neutral-point-clamped type three-level converter is proposed, has the advantages that composition is simple, control is flexible, reliable, harmonic content is few.
Description
Technical field
The present invention relates to a kind of five-level converter control system based on three-level topology circuit, suitable for frequency control
Field.
Background technology
With modern economy society and the fast development of power industry, water energy, wind energy, solar energy, nuclear energy, ocean energy etc.
Proportion of the clean energy resource in power supply architecture increasingly increases, and electric system frequency modulation problem and load peak-valley difference contradiction are increasingly prominent
Go out, be also peak load regulation network, frequency modulation and steady safe operation bring considerable degree of challenge.For these for solving that power grid is faced
Problem, peak clipping, Fill valley, frequency modulation, phase modulation that hydroenergy storage station is taken on by it in power grid etc. uniqueness role and generate it is huge
The social benefits such as big economy, ecology, and as presently the most economical and effective power system load regulating measure.
The power-equipment that hydroenergy storage station unit uses is that a kind of three-phase that can have not only made generator but also can make motor is convex
Pole formula synchronous generator-motor.When power grid is located at the peak load period, hydroenergy storage station synchronization unit operates in generator mould
Formula (generating state) conveys electric energy for power grid;When power grid is located at the low ebb load period, hydroenergy storage station synchronization unit operates in
Electric motor mode (water pump state) drives water pump turbine or coaxial water pump by the water pump of lower reservoir to upper pond, by electric energy
It is spare to be converted to potential energy storage.
Synchronous generator-motor is one kind of numerous ac motors.Ac motor is most electronic of current ownership
Machine is just used for most of industrial electricity by ac motor.Ac motor is to turn electric energy
The important electrical of mechanical energy is changed to, does not merely have to adjust the rotation of ac motor speed according to the demand of production technology
Degree, and require to export higher energy converting between mechanical efficiency.Therefore, the speed adjusting performance of ac motor is ensureing equipment matter
Amount improves industrial productivity and plays a key effect in terms of saving energy consumption.Equipped with the ac motor of automaton, just
Constitute AC transmission speed-regulating system.
Compared with dc motor, ac motor, which has, to be formed simple, of low cost, reliable, easy to maintain, turns
Dynamic the features such as inertia is small, delivery efficiency is high, use condition is unrestricted, but once be subject to being limited in technical principle.20 generation
It has recorded since the seventies, (is such as sweared as Power Electronic Technique, computer technology, microelectric technique and A/C transmission control are theoretical
Measure control, Direct Torque Control, decoupling control etc.) further development, Alternating Current Governor System oneself through being industrial production, power saving section
Huge economic benefit is brought in the fields such as energy, and suitable for high-capacity or extremely high-revolving electric drive system.
The content of the invention
The present invention provides a kind of five-level converter control system based on three-level topology circuit, it is proposed that a kind of by H
The mixed type frequency converter that bridge inverter is combined with neutral-point-clamped type three-level converter, with composition is simple, control is flexible, transports
The advantages of row is reliable, harmonic content is few.
The technical solution adopted in the present invention is：
The mixed type frequency converter that H bridge inverters are combined by frequency converter control system with neutral-point-clamped type three-level converter, it is main
It to be made of five-level converter, H bridge cascade connection multi-levels frequency converter, varying frequency starting experimental system.
The rectifying part of the five-level converter is made of 6 groups of secondary side phase-shifting transformers, 6 groups of diode rectifier bridges,
3 sets of DC power supplies being isolated from each other are formed, the Converting Unit of five-level converter is by 3 sets of H bridges based on three-level topology circuit
Inverter is formed.
Every phase bridge arm of the five-level converter main circuit based on three-level topology circuit is by two diode clamps
The tri-level half-bridge structure of circuit is formed in parallel, and 3 H bridges are connected according to star connection, forms three-phase inverter.N is neutral point,
A, b, c are respectively three-phase inversion output.Each H bridges output phase voltage is five level, and line voltage is nine level.With same level
Several neutral-point-clamped type three-level converters is compared with H bridge frequency converters, and such a configuration obviates clamp diode is excessive, independent electrical
The problem of source is excessive.
In the H bridges cascade connection multi-level frequency converter, each unit is H bridge basic circuits, and each basic circuit is by inputting
The direct voltage source of side and the single-phase H bridge inverters composition of outlet side.Wherein DC power supply is independent from each other, usually can be by moving
Phase transformer output obtains.By controlling each device for power switching of frequency converter, frequency and size can be obtained in outlet side
Controllable voltage waveform;By being connected in series for multiple H bridges basic circuits, amplitude higher, characteristic can be obtained more in outlet side
Good voltage waveform, suitable for special application scenario.
The software section of the varying frequency starting experimental system is mainly by DSP processing chips program and fpga chip program groups
Into.Wherein, DSP programs include the parts such as control main program, communications protocol, user's input/output state machine, error protection program,
FPGA programs include the parts such as communication interface, pulse distribution, IGBT error protections, exterior I/O drivings, the choosing of AD pieces.
The beneficial effects of the invention are as follows：It proposes and a kind of mutually ties H bridge inverters and neutral-point-clamped type three-level converter
The mixed type frequency converter of conjunction has the advantages that composition is simple, control is flexible, reliable, harmonic content is few.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the five-level converter structure chart of the present invention.
Fig. 2 is the H bridge cascade connection multi-level converter circuits of the present invention.
Fig. 3 is H bridges cascade connection multi-level converter circuit of the present invention.
Fig. 4 is the frequency Controlled Starting System programming flowchart of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, the rectifying part of five-level converter is by 6 groups of secondary side phase-shifting transformers, 6 groups of diode rectifier bridge structures
Into 3 sets of DC power supplies being isolated from each other of formation;The Converting Unit of five-level converter is by 3 sets of H based on three-level topology circuit
Bridge inverter is formed.
Such as Fig. 2, every phase bridge arm of the five-level converter main circuit based on three-level topology circuit is by two diode clamps
The tri-level half-bridge structure of position circuit is formed in parallel, and 3 H bridges are connected according to star connection, forms three-phase inverter.N is neutrality
Point, a, b, c are respectively three-phase inversion output.Each H bridges output phase voltage is five level, and line voltage is nine level.With it is identical
The neutral-point-clamped type three-level converter of level number is compared with H bridge frequency converters, excessive, only such a configuration obviates clamp diode
Found the problem of power supply is excessive.
Such as Fig. 3, in H bridge cascade connection multi-level frequency converters, each unit is H bridge basic circuits, and each basic circuit is by defeated
Enter the direct voltage source of side and the single-phase H bridge inverters composition of outlet side.Wherein DC power supply is independent from each other, usually can be by
Phase-shifting transformer output obtains.By controlling each device for power switching of frequency converter, frequency and big can be obtained in outlet side
Small controllable voltage waveform;By being connected in series for multiple H bridges basic circuits, amplitude higher, characteristic can be obtained in outlet side
Better voltage waveform, suitable for special application scenario.
Such as Fig. 4, the software section of varying frequency starting experimental system is mainly by DSP processing chips program and fpga chip program groups
Into.Wherein, DSP programs include the parts such as control main program, communications protocol, user's input/output state machine, error protection program,
FPGA programs include the parts such as communication interface, pulse distribution, IGBT error protections, exterior I/O drivings, the choosing of AD pieces.
Claims (8)
1. a kind of five-level converter control system based on three-level topology circuit, it is characterized in that：The Frequency Converter Control
The mixed type frequency converter that H bridge inverters are combined by system with neutral-point-clamped type three-level converter, mainly by five level frequency conversion
Device, H bridge cascade connection multi-levels frequency converter, varying frequency starting experimental system composition.
2. a kind of five-level converter control system based on three-level topology circuit according to claim 1, feature
It is：The rectifying part of the five-level converter is made of 6 groups of secondary side phase-shifting transformers, 6 groups of diode rectifier bridges, forms 3
Cover the DC power supply being isolated from each other.
3. a kind of five-level converter control system based on three-level topology circuit according to claim 1, feature
It is：The Converting Unit of the five-level converter is made of 3 sets of H bridge inverters based on three-level topology circuit.
4. a kind of five-level converter control system based on three-level topology circuit according to claim 1, feature
It is：Every phase bridge arm of the five-level converter main circuit based on three-level topology circuit is by two diode clamping circuits
Tri-level half-bridge structure be formed in parallel, 3 H bridges are connected according to star connection, form three-phase inverter.
5. a kind of five-level converter control system based on three-level topology circuit according to claim 1, feature
It is：In the five-level converter main circuit, n is neutral point, and a, b, c is respectively three-phase inversion output.Each H bridge the output phases
Voltage is five level, and line voltage is nine level.
6. a kind of five-level converter control system based on three-level topology circuit according to claim 1, feature
It is：In the H bridges cascade connection multi-level frequency converter, each unit is H bridge basic circuits, and each basic circuit is by the straight of input side
The single-phase H bridge inverters of galvanic electricity potential source and outlet side form.
7. a kind of five-level converter control system based on three-level topology circuit according to claim 1, feature
It is：The DC power supply is independent from each other, and can usually be exported and obtained by phase-shifting transformer, by each work(for controlling frequency converter
Rate switching device, can be in the controllable voltage waveform of outlet side acquisition frequency and size.
8. a kind of five-level converter control system based on three-level topology circuit according to claim 1, feature
It is：The software section that the frequency starts experimental system is mainly made of DSP processing chips program and fpga chip program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611074236.5A CN108123612A (en) | 2016-11-29 | 2016-11-29 | A kind of five-level converter control system based on three-level topology circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611074236.5A CN108123612A (en) | 2016-11-29 | 2016-11-29 | A kind of five-level converter control system based on three-level topology circuit |
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| Publication Number | Publication Date |
|---|---|
| CN108123612A true CN108123612A (en) | 2018-06-05 |
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ID=62226763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611074236.5A Pending CN108123612A (en) | 2016-11-29 | 2016-11-29 | A kind of five-level converter control system based on three-level topology circuit |
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| CN (1) | CN108123612A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148961A (en) * | 2019-04-23 | 2019-08-20 | 上海交通大学 | Grid-connected system is pressed in the floating power generation of medium temperature geothermal energy magnetic based on five-level converter |
| JP2020195226A (en) * | 2019-05-29 | 2020-12-03 | 株式会社日立製作所 | Power converter and variable speed pumped storage power generation system |
-
2016
- 2016-11-29 CN CN201611074236.5A patent/CN108123612A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148961A (en) * | 2019-04-23 | 2019-08-20 | 上海交通大学 | Grid-connected system is pressed in the floating power generation of medium temperature geothermal energy magnetic based on five-level converter |
| JP2020195226A (en) * | 2019-05-29 | 2020-12-03 | 株式会社日立製作所 | Power converter and variable speed pumped storage power generation system |
| EP3745587A3 (en) * | 2019-05-29 | 2021-04-14 | Hitachi, Ltd. | Power conversion device and variable-speed pumped-storage power generation system |
| JP7221795B2 (en) | 2019-05-29 | 2023-02-14 | 株式会社日立製作所 | Power converter and adjustable speed pumped storage system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180605 |
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| WD01 | Invention patent application deemed withdrawn after publication |