CN101447742A - Single-phase voltage-dividing multilevel unit-in-series high-voltage converter - Google Patents
Single-phase voltage-dividing multilevel unit-in-series high-voltage converter Download PDFInfo
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- CN101447742A CN101447742A CNA2008101402016A CN200810140201A CN101447742A CN 101447742 A CN101447742 A CN 101447742A CN A2008101402016 A CNA2008101402016 A CN A2008101402016A CN 200810140201 A CN200810140201 A CN 200810140201A CN 101447742 A CN101447742 A CN 101447742A
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Abstract
The invention discloses a single-phase voltage-dividing multilevel unit-in-series high-voltage converter, comprising a single-phase voltage-dividing input isolation transformator (1), a single-phase current-changing power unit (2) and a centralized control unit (3). The input side of the single-phase voltage-dividing input isolation transformator (1) is connected with a triphase high voltage source and the output side thereof is connected with the single-phase current-changing power unit (2); the single-phase current-changing power unit (2) is connected with the centralized control unit (3) by an optical fiber (4); the single-phase voltage-dividing input isolation transformator (1) converts the triphase high voltage source to single-phase input source; and the single-phase current-changing power unit (2) inverts the single-phase input source under the control of the centralized control unit (3) and output high triphase output voltage with adjustable frequency. The high-voltage converter has the advantages of large capacity, small volume and simple structure.
Description
Technical field
The present invention relates to a kind of high voltage converter that is used for the high voltage source frequency translation, belong to the high-voltage and high-power power electronic application.
Background technology
In country's " research of motor speed adjusting technique industrialization approach and countermeasure " report, 66% of Chinese energy output total amount consumes on motor, and the present motor total installation of generating capacity of China has surpassed 400,000 megawatts, and high-voltage motor accounts for half.High-tension motor is owing to factors such as design margin, working condition requirement, load variations, and a lot of high-tension motors exist the phenomenon of low load with strong power, have wasted a large amount of electric energy, therefore utilizes high voltage converter to carry out the direction that variable speed energy saving has been national industrial development.
High voltage converter belongs to high-tech, high complicated, highly difficult power electronic product, the ripe at home high voltage converter of using all is the multilevel unit-in-series structure, each power cell all is the single-phase micro frequency transformers of three phase transformations, and its complex structure is bulky.At present, in the high voltage converter for multivoltage units in series voltage-source type principle, to its topological structure all is from combine the high voltage converter of the multilevel unit-in-series voltage-source type principle that single-phase transducing power unit of no use combined with the single-phase power cell of three phase transformations.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of single-phase voltage-dividing multilevel unit-in-series high-voltage converter that can realize big capacity, small size, its technical scheme of taking is:
This frequency converter comprises unidirectional dividing potential drop input isolating transformer, unidirectional transducing power unit and central control unit, the input side of unidirectional dividing potential drop input isolating transformer inserts the three-phase high-voltage power supply, its outlet side connects unidirectional transducing power unit, unidirectional transducing power unit connects central control unit by optical fiber, unidirectional dividing potential drop input isolating transformer is transformed to single-phase input power supply with the three-phase high-voltage power supply, unidirectional transducing power unit carries out inversion, the three-phase high-voltage output voltage that output frequency is adjustable at following single-phase input power supply of the control of central control unit.
Unidirectional dividing potential drop input isolating transformer adopts three-phase core type appendiron core transformer structure, input side is a star three-phase high-voltage winding, outlet side is the single-phase winding of a plurality of identical and mutual isolation, each single-phase winding connects with it corresponding unidirectional transducing power unit, and each unidirectional transducing power unit connects the back by the units in series structure and inserts user side.
Unidirectional transducing power unit comprises rectifier bridge, chokes ring, capacitor array, master control borad, IGBT module and bypass contactor, the single-phase winding of unidirectional dividing potential drop input isolating transformer connects rectifier bridge, after the direct voltage of rectifier bridge output is by the flat ripple of chokes ring, input to capacitor array, the voltage of output waveform is controlled in the output of master control borad control IGBT module mutually, and is in parallel with the chokes ring by the bypass contactor of master control borad control.
Central control unit comprises fiber port, central control board, signal interface board, controls output board, power panel and bus board mutually, to fiber port, central control board, signal interface board with control output board mutually and power, central control board, signal interface board and the signal of controlling mutually between output board transmit by bus board power panel by bus board.
This frequency converter is imported high voltage source with three-phase and is converted into a plurality of single-phase input power supplys, it is the single-phase output wave of controlling mutually that the single-phase transducing power unit of employing standard carries out inversion, a plurality ofly single-phasely control output wave output mutually and be superposed to three phase sine high pressure output voltage, can realize small size, jumbo high voltage converter structure.
The advantage that the present invention had is: this frequency converter adopts the three-phase core type iron core input transformer structure of original creation; Utilize single-phase unsteady flow power cell to form the topological structure form of multilevel unit-in-series voltage-source type high voltage converter; Single-phase unsteady flow power cell is exported with the single-phase output wave voltage of controlling mutually for the output of single phase industrial frequence voltage; In the high voltage converter that the high voltage converter topology principle of multilevel unit-in-series voltage-source type is made, have that capacity is big, volume is little, advantage of simple structure.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is the figure that splits that single-phase voltage-dividing is imported the isolating transformer winding among the present invention;
Fig. 3 is the circuit theory diagrams of single-phase transducing power unit among the present invention;
Fig. 4 is the structured flowchart of central control unit among the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is done detailed description:
As shown in Figure 1, the input side of unidirectional dividing potential drop input isolating transformer 1 inserts the three-phase high-voltage power supply, its outlet side connects unidirectional transducing power unit 2, unidirectional transducing power unit 2 connects central control unit 3 by optical fiber 4, and unidirectional transducing power unit 2 connects the back by the units in series structure and inserts user side (high-tension motor).
As shown in Figure 2, single-phase voltage-dividing input isolating transformer 1 adopts three-phase core type appendiron core transformer structure, and the input high-pressure side is a star three-phase high-voltage winding, this high pressure winding is positioned at the inboard near stem stem, and the output low-pressure side is all identical and single-phase winding that isolate fully mutually of voltage, power, is a1 on A phase stem stem, a2, a3, a4, a5, six single-phase windings of a6 are b1 on B phase stem stem, b2, b3, b4, b5, six single-phase windings of b6, on C phase stem stem is c1, c2, c3, c4, c5, six single-phase windings of c6.A1, a2, a3, a4, a5, six single-phase windings of a6 are received A1 as shown in Figure 1, A2, A3, A4, A5, these six single-phase transducing power units of standard of A6, b1, b2, b3, b4, b5, six single-phase windings of b6 are received B1, B2, B3, B4, B5, these six single-phase transducing power units of standard of B6, c1, c2, c3, c4, c5, six single-phase windings of c6 are received C1, C2, C3, C4, C5, these six single-phase transducing power units of standard of C6.
As shown in Figure 1, A1, A2, A3, A4, A5, the output of these six single-phase transducing power units of standard of the A6 A that forms the single-phase voltage-dividing multilevel unit-in-series high-voltage frequency conversion system that is together in series exports B1, B2 mutually, B3, B4, B5, the output of these six single-phase transducing power units of standard of the B6 B that forms the single-phase voltage-dividing multilevel unit-in-series high-voltage frequency conversion system that is together in series exports mutually, C1, C2, C3, C4, C5, the output of these six single-phase transducing power units of standard of the C6 C that forms the single-phase voltage-dividing multilevel unit-in-series high-voltage frequency conversion system that is together in series exports mutually.
As shown in Figure 3, unidirectional transducing power unit 2 comprises rectifier bridge 5, chokes ring 6, capacitor array 7, master control borad 8, IGBT module 9 and bypass contactor 10, the single-phase winding of unidirectional dividing potential drop input isolating transformer 1 connects rectifier bridge 5, after the direct voltage of rectifier bridge 5 output is by chokes ring 6 flat ripples, input to capacitor array 7, the voltage of output waveform is controlled in 9 outputs of master control borad 8 control IGBT modules mutually, on output phase control output voltage loop, by chokes ring 6 bypass contactors 13 in parallel, realize the bypass functionality of single-phase unsteady flow power cell by master control borad 8 controls.Wherein rectifier bridge 5 is a single-phase rectification bridge, is by the module of four diodes by single-phase full bridge commutating circuit construction packages; Two of the homemade C type ferrite of chokes ring 6 employings side by side, makes at the last two astragal cables that are wound with; Capacitor array 11 is to adopt 6 400V/4700uF alminium electrolytic condensers, and three strings two are also fixed with support.
As shown in Figure 4, central control unit 3 comprises fiber port 11, central control board 12, signal interface board 13, controls output board 14, power panel 15 and bus board 16 mutually.Power panel 15 is by 16 pairs of fiber ports 11 of bus board, central control board 12, signal interface board 13 and control output board 14 mutually and power, and central control board 12, signal interface board 13 and the signal of controlling 14 of output boards mutually are by bus board 16 transmission.Wherein central control board 12 is made up of two dsp chips of TMS320 series, memory chip, corresponding peripheral driver chip; Controlling output board 14 mutually is made up of the AVR chip of cyclon Series FPGA chip, ATtiny series, the AD chip of 89 series.
After this high voltage converter is in stand-by state, the user assigns operating instruction, after central control unit 3 is accepted user's instruction, directly import among the DSP of central control board 12, the logical operation of DSP is delivered to user interface with the information and the controlling schemes of high voltage converter by signal interface board 13.The operation of the vector control of DSP is decomposed into the angle of three-phase output voltage, amplitude, direction etc. that independent A modulates mutually, B modulates mutually, C phase modulation signal, sends to A and controls output board, B mutually mutually and control output board, C mutually mutually and control output board mutually mutually.Each is controlled the control mutually of the FPGA in the output board mutually and exports all unanimities of modulation program, after controlling total modulation signal that output board 14 receives 12 mistakes of central control board mutually, carry out many level phase shift modulation according to the single-phase transducing power unit quantity of the standard of every phase and become a plurality of different controls mutually outputs to divide modulation signals.Receive mutually after control output divides modulation signal at the AVR single-chip microcomputer of controlling output board 14 mutually, it is modulated to control output control signal mutually, send to corresponding single-phase transducing power unit 2 by fiber port 11, after power cell receives control signal, connect the requirement according to the PMW control signal, output waveform is controlled in output accordingly mutually.After 2 outputs of all single-phase transducing power units are controlled output wave accordingly mutually, be superimposed as the high voltage source of required frequency adjustable by three-phase.
Claims (4)
1, a kind of single-phase voltage-dividing multilevel unit-in-series high-voltage converter, comprise unidirectional dividing potential drop input isolating transformer (1), unidirectional transducing power unit (2) and central control unit (3), it is characterized in that: the input side of unidirectional dividing potential drop input isolating transformer (1) inserts the three-phase high-voltage power supply, its outlet side connects unidirectional transducing power unit (2), unidirectional transducing power unit (2) connects central control unit (3) by optical fiber (4), unidirectional dividing potential drop input isolating transformer (1) is transformed to single-phase input power supply with the three-phase high-voltage power supply, unidirectional transducing power unit (2) carries out inversion, the three-phase high-voltage output voltage that output frequency is adjustable at following single-phase input power supply of the control of central control unit (3).
2, single-phase voltage-dividing multilevel unit-in-series high-voltage converter according to claim 1, it is characterized in that: unidirectional dividing potential drop input isolating transformer (1) adopts three-phase core type appendiron core transformer structure, input side is a star three-phase high-voltage winding, outlet side is the single-phase winding of a plurality of identical and mutual isolation, each single-phase winding connects with it corresponding unidirectional transducing power unit (2), and each unidirectional transducing power unit (2) connects the back by the units in series structure and inserts user side.
3, single-phase voltage-dividing multilevel unit-in-series high-voltage converter according to claim 1 and 2, it is characterized in that: unidirectional transducing power unit (2) comprises rectifier bridge (5), chokes ring (6), capacitor array (7), master control borad (8), IGBT module (9) and bypass contactor (10), the single-phase winding of unidirectional dividing potential drop input isolating transformer (1) connects rectifier bridge (5), after the direct voltage of rectifier bridge (5) output is by the flat ripple of chokes ring (6), input to capacitor array (7), the voltage of output waveform is controlled in master control borad (8) control IGBT module (9) output mutually, and is in parallel with chokes ring (6) by the bypass contactor (10) of master control borad (8) control.
4, single-phase voltage-dividing multilevel unit-in-series high-voltage converter according to claim 1, it is characterized in that: central control unit (3) comprises fiber port (11), central control board (12), signal interface board (13), control output board (14) mutually, power panel (15) and bus board (16), power panel (15) passes through bus board (16) to fiber port (11), central control board (12), signal interface board (13) with control output board (14) mutually and power central control board (12), signal interface board (13) transmits by bus board (16) with the signal of controlling mutually between output board (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101402016A CN101447742A (en) | 2008-09-11 | 2008-09-11 | Single-phase voltage-dividing multilevel unit-in-series high-voltage converter |
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| CNA2008101402016A CN101447742A (en) | 2008-09-11 | 2008-09-11 | Single-phase voltage-dividing multilevel unit-in-series high-voltage converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340255A (en) * | 2010-07-16 | 2012-02-01 | 洛克威尔自动控制技术股份有限公司 | Power layer generation of inverter gate drive signals |
| CN102394554A (en) * | 2011-10-13 | 2012-03-28 | 国电南京自动化股份有限公司 | Power unit bypass circuit with redundancy control function |
| CN101621255B (en) * | 2009-08-06 | 2012-05-23 | 东南大学 | Cascade connection energy-regenerative type high-voltage converter |
| CN113036931A (en) * | 2021-05-21 | 2021-06-25 | 苏州汇川控制技术有限公司 | Optical fiber series high-voltage frequency converter and control method thereof |
-
2008
- 2008-09-11 CN CNA2008101402016A patent/CN101447742A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621255B (en) * | 2009-08-06 | 2012-05-23 | 东南大学 | Cascade connection energy-regenerative type high-voltage converter |
| CN102340255A (en) * | 2010-07-16 | 2012-02-01 | 洛克威尔自动控制技术股份有限公司 | Power layer generation of inverter gate drive signals |
| CN102394554A (en) * | 2011-10-13 | 2012-03-28 | 国电南京自动化股份有限公司 | Power unit bypass circuit with redundancy control function |
| CN113036931A (en) * | 2021-05-21 | 2021-06-25 | 苏州汇川控制技术有限公司 | Optical fiber series high-voltage frequency converter and control method thereof |
| CN113036931B (en) * | 2021-05-21 | 2021-08-27 | 苏州汇川控制技术有限公司 | Optical fiber series high-voltage frequency converter and control method thereof |
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Application publication date: 20090603 |