CN106887956A - One kind is without harmonic wave high voltage converter - Google Patents
One kind is without harmonic wave high voltage converter Download PDFInfo
- Publication number
- CN106887956A CN106887956A CN201510937631.0A CN201510937631A CN106887956A CN 106887956 A CN106887956 A CN 106887956A CN 201510937631 A CN201510937631 A CN 201510937631A CN 106887956 A CN106887956 A CN 106887956A
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- CN
- China
- Prior art keywords
- high voltage
- harmonic wave
- voltage
- phase
- converter
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- 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.)
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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
- 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
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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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses one kind without harmonic wave high voltage converter.It is described without harmonic wave high voltage converter be it is every be serially connected by multiple low-voltage variable frequency power cells, realize High voltage output by being superimposed.There is a phase difference mutually to the Secondary Winding that power cell is powered, to realize input voltage multiplex, the harmonic wave of less than 35 times can offset, satisfied sine voltage and sine-wave current can be obtained in various velocity intervals, voltage total harmonic distortion only has 1.2%, and electric current total harmonic distortion is only 0.8%.Low-voltage variable frequency power cell is the PWM type frequency converters of a three-phase input single-phase output.Three-phase bridge rectifier circuit is constituted by a diode, being reverse into single phase ac by 4 low pressure IGBT after rectification exports.Easy to maintenance, reliability is high.Major part without harmonic wave high voltage converter only needs isolating transformer and frequency converter, without power factor compensation device, harmonic filter etc., simple structure.
Description
Technical field
The invention belongs to a kind of high voltage converter.
Background technology
At present, traditional high voltage converter harmonic pollution is big, and harmonic wave not only consumes idle; increase line loss, influence relay protection reliability service, motor is produced additional moment and loss; weak electricity system is disturbed, but also can make line voltage that Severe distortion occurs, or even power system security accident occurs.
The content of the invention
Goal of the invention：The technical problems to be solved by the invention are directed to the deficiencies in the prior art, there is provided one kind is without harmonic wave high voltage converter.
In order to solve the above-mentioned technical problem, the invention discloses one kind without harmonic wave high voltage converter, including isolating transformer and frequency converter.
It is described without harmonic wave high voltage converter high voltage converter, it be it is every be serially connected by multiple low-voltage variable frequency power cells, realize High voltage output by being superimposed.There is a phase difference mutually to the Secondary Winding that power cell is powered, to realize input voltage multiplex.
The power cell is the PWM type frequency converters of a three-phase input single-phase output.Three-phase bridge rectifier circuit is constituted by a diode, being reverse into single phase ac by 4 low pressure IGBT after rectification exports.
This frequency converter output voltage saltus step step is the DC bus-bar voltage of unit, voltage change ratio very little, simultaneously because using phase shift PWM, the equivalent switching frequency of electric moter voltage is greatly improved, and output level number increases.This frequency converter, without particular/special requirement, can be directly used for any ordinary high pressure motor, and need not reduce rated capacity using to motor, and output cable length is also not particularly limited.
Beneficial effect：Of the present invention without harmonic wave high voltage converter, compared with ordinary high pressure frequency converter, harmonic pollution is small, and reliability is high, and loss is small, and performance is good, easy to use.
Brief description of the drawings
The present invention is done with reference to the accompanying drawings and detailed description further is illustrated, of the invention above-mentioned and/or otherwise advantage will become apparent.
Fig. 1 is implementing circuit figure of the present invention.
Specific embodiment
The invention discloses one kind without harmonic wave high voltage converter.
This high voltage converter, it be it is every be serially connected by multiple low-voltage variable frequency power cells, realize High voltage output by being superimposed.There is a phase difference mutually to the Secondary Winding that power cell is powered, to realize input voltage multiplex.As a example by 6 kilovolts without harmonic wave high voltage converter, per by 6 power unit cascades, three-phase has 18 power cells, powered by 18 Secondary Windings of input isolating transformer respectively, 18 Secondary Windings are divided into 6 groups, there are 10 ° of phase differences between every group, are formed equivalent to 36 impulse commutations.Because input is 36 pulses, so the harmonic wave of less than 35 times can offset in theory, satisfied sine voltage and sine-wave current can be obtained in various velocity intervals, voltage total harmonic distortion only has 1.2%, electric current total harmonic distortion is only 0.8%, input filter need not be used, the strict demand of IEEE519-1992 can be just met.
Power cell is the PWM type frequency converters of a three-phase input single-phase output.Three-phase bridge rectifier circuit is constituted by diode, being reverse into single phase ac by 4 low pressure IGBT after rectification exports.Because using conventional low pressure IGBT, drive circuit is simple, technology maturation reliability.This high voltage converter, due to using modular construction, power cell used is identical, can exchange, and each power cell contacts only 3 AC input terminals, 2 AC output terminals and an Optical fiber plug with system, and unit maintenance changes very convenient.Moreover, due to using power unit cascade structure, can be designed by transparent cell bypass technology and power unit redundancy, greatly improve the reliability of system.Automatic can fall the power cell for breaking down in 250ms internal bypass without harmonic wave high voltage converter, frequency convertor system is normally run.Another enhancing perfect harmony high voltage converter reliability feature is its control mode.Process allowance Preservation tactics are brand-new process control systems.When breaking down, the strategy provides hierarchy system warning, rather than frequency converter tripping operation and automatic closing system.The control mode allows the estimate of situation within the regular hour, and makes corresponding response, it is to avoid system is closed, and realizes that system runs without interruption to greatest extent.In addition; this frequency convertor system can bear the decline of -30% supply voltage; load shedding is run without tripping, preventing stall; automatic load shedding is run, stops various control and the defencive functions such as recurrence function, overcurrent, short circuit, ground connection, overvoltage, under-voltage, overload, overheat, phase shortage, high voltage cabinet door interlock protection, cooling system failure protection, control power faiture safe wink during overburden, substantially increases the security reliability of system.
Traditional frequency converter possesses 5 individual components, i.e. input filter, power factor compensation, isolating transformer, inverter and output filter.And the major part of perfect harmony high voltage converter only needs isolating transformer and frequency converter, without power factor compensation device, harmonic filter etc., simple structure, simultaneously because harmonic component very little, the loss for causing power transformer to motor by harmonic wave is greatly reduced, along with IGBT driving power very littles, peak power is 5 watts or so, mean power is less than 1 watt, switching frequency is relatively low, and equalizer circuit and absorbing circuit need not be used, and make inverter unit component efficiency high by 98.5%, the efficiency high including the whole frequency conversion system including input isolating transformer is up to 97%.
This frequency converter output voltage saltus step step is the DC bus-bar voltage of unit, voltage change ratio very little, simultaneously because using phase shift PWM, the equivalent switching frequency of electric moter voltage is greatly improved, and output level number increases.6 kilovolts of Siemens's perfect harmony high voltage converters, output phase voltage is 11 level, and line voltage is 21 level, and output equivalent switching frequency is 6 kilo hertzs.The increase of level number and equivalent switching frequency, substantially improves output waveform, reduces output harmonic wave, causes that the motor feels hot by harmonic wave, noise, torque pulsation, common-mode voltage are all greatly reduced.So this frequency converter to motor without particular/special requirement, can be directly used for any ordinary high pressure motor, and rated capacity need not be reduced using, output cable length is also not particularly limited.
This frequency converter is easy to set up and controls, and has easy-to-use high level functional operation keyboard in cabinet door, and can be by the way that frequency converter is configured and is controlled on RS485 or standard ethernet port connection individual PC；Support various protocols；There is provided based on Windows graphic user interface and with the identical menu structure of keyboard interface, it is multiple functional, it is very easy to use.
The invention provides a kind of thinking and method without harmonic wave high voltage converter; the method and approach for implementing the technical scheme are a lot; the above is only the preferred embodiment of the present invention; it should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.Each part being not known in the present embodiment can use prior art to be realized.
Claims (2)
1. one kind is without harmonic wave high voltage converter, per being serially connected by multiple low-voltage variable frequency power cells, by be superimposed come
Realize High voltage output.
2. it is according to claim 1 without harmonic wave high voltage converter, it is characterised in that low-voltage variable frequency power cell is one
, there is a phase mutually to the Secondary Winding that power cell is powered in the PwM type frequency converters of three-phase input single-phase output
Difference, to realize input voltage multiplex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510937631.0A CN106887956A (en) | 2015-12-15 | 2015-12-15 | One kind is without harmonic wave high voltage converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510937631.0A CN106887956A (en) | 2015-12-15 | 2015-12-15 | One kind is without harmonic wave high voltage converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106887956A true CN106887956A (en) | 2017-06-23 |
Family
ID=59174596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510937631.0A Pending CN106887956A (en) | 2015-12-15 | 2015-12-15 | One kind is without harmonic wave high voltage converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106887956A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311246A (en) * | 2019-07-30 | 2021-02-02 | 株洲中车时代电气股份有限公司 | Permanent magnet variable frequency transmission system for central air conditioner and central air conditioner system |
-
2015
- 2015-12-15 CN CN201510937631.0A patent/CN106887956A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311246A (en) * | 2019-07-30 | 2021-02-02 | 株洲中车时代电气股份有限公司 | Permanent magnet variable frequency transmission system for central air conditioner and central air conditioner system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170623 |
|
| WD01 | Invention patent application deemed withdrawn after publication |