CN101924476A - Single-phase alternating current converter of intermediate alternating current voltage - Google Patents
Single-phase alternating current converter of intermediate alternating current voltage Download PDFInfo
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- CN101924476A CN101924476A CN2010102824084A CN201010282408A CN101924476A CN 101924476 A CN101924476 A CN 101924476A CN 2010102824084 A CN2010102824084 A CN 2010102824084A CN 201010282408 A CN201010282408 A CN 201010282408A CN 101924476 A CN101924476 A CN 101924476A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a single-phase alternating current converter of intermediate alternating current voltage in the technical field of power systems, which comprises an alternating current chopper circuit, a step-down conversion circuit, a waveform conversion circuit and an inverter and filter circuit which are in cascade connection sequentially, wherein the alternating current chopper circuit is used for converting high-voltage power frequency alternating current voltage to high-frequency pulse alternating current voltage and outputting to the step-down conversion circuit, the step-down conversion circuit is used for filtering the high-frequency pulse high-voltage alternating current voltage, converting to low-voltage direct current voltage and outputting to the waveform conversion circuit, the waveform conversion circuit is used for improving the alternating current voltage on the network side and current waveform and outputting the low-voltage direct current voltage to the inverter and filter circuit, and the inverter and filter circuit is used for inverting the low-voltage direct current voltage and filtering into power frequency alternating current sine wave voltage. The single-phase alternating current converter can realize power factor inputted by a unit on the network side and suppress harmonic current on the network side for the use of a user.
Description
Technical field
What the present invention relates to is the device in a kind of transformer technology field, specifically is a kind of single phase alternating current (A.C.) converter of interstage exchange voltage.
Background technology
Electric power electric transformer mainly is made up of converters, high frequency transformer and controller etc.Wherein, the converters of being made up of high frequency device for high-power power electronic such as IGBT or IGCT is the core of electric power electric transformer, and its function is to finish the frequency of electric energy, amplitude conversion.The function of high frequency transformer is to isolate and transformation, the function of controller be realize transformation of electrical energy, voltage is stable and the control of the quality of power supply.
Find through retrieval prior art, Chinese patent application number 02139030.4, open day: 2003.03.12. put down in writing a kind of " electric power electric transformer ", this technology electric power electric transformer is based on three-phase-three-phase matrix converter structure, intermediate link is very complicated, realize that difficulty is very high, economy is lower, is difficult to realize and apply.
Further retrieval is found, Chinese patent application numbers 200910025824.3, open day: 2009.11.04. put down in writing a kind of " multifunctional power electric transformer ", the electric power electric transformer of this technology is multiple functional, but structure is very complicated, the control difficulty is very high, and feasibility is lower, is difficult to realize and obtain extensive use.
WANG JUN etc., " intelligent grid technology " .IEEE Trans.on Industry Electronics Magzine industrial electronic magazine) .2009 .. in June has put down in writing a kind of " based on the electric power electric transformer technology of traditional thought ", this technology has stronger function, but structure is very complicated, the control difficulty is very high, and feasibility is lower.
Research and development along with the SiC material, can export flexibly based on the electric power electric transformer of SiC IGBT and to satisfy the electric power that different user requires, and owing to adopting high-frequency rectification and inversion transformation technique, AC wave chopping technology, compare with the conventional electric power transformer, have that volume is little, in light weight, power supply quality is high, power factor is high, be convenient to advantage such as monitoring automatically, and do not have problem such as magnetic saturation unshakable in one's determination.
Based on literature search and Cha Xin result, so far, the development of electric power electric transformer still is in initial period, circuit topology and control algolithm still are in the combination of existing basic transformation device topology and control algolithm is continued to use the stage, it is complicated loaded down with trivial details with control to show as topology, functional defect has the cost height, a deficiency such as volume is big and reliability is low.Need to propose new circuit topology and control algolithm for this reason, make electric power electric transformer have advantages such as controlling simple and unit input power factor.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of single phase alternating current (A.C.) converter of interstage exchange voltage is provided, is high-frequency alternating current by will import industrial frequency AC in the net side by the converters raising frequency, this high-frequency alternating current is coupled by high frequency transformer after the converters frequency reducing is reduced into industrial frequency AC output, realize the unit input power factor of net side, suppress side harmonics electric current power supply network user and use.
The present invention is achieved by the following technical solutions, the present invention includes: the AC chopping circuit of cascade successively, step-down conversion circuit, waveform transformation circuit and inversion filter circuit, wherein: the AC chopping circuit converts the high pressure power frequency ac voltage high frequency pulse AC voltage to and exports step-down conversion circuit to, step-down conversion circuit is with the filtering of high-frequency impulse High AC voltage and be converted to low-voltage dc voltage and export the waveform transformation circuit to, the waveform transformation circuit improves net top-cross stream voltage and current waveform and exports low-voltage dc voltage to the inversion filter circuit, and the inversion filter circuit is with the low-voltage dc voltage inversion and be filtered into the industrial frequency AC sine voltage.
Described AC chopping circuit comprises: be used for the single-phase matrix convertor of AC chopping and be attached thereto the input filter circuit that connects.
The described single-phase matrix convertor that is used for AC chopping is made up of the single-phase converter unit of four bridge joints, and each single-phase converter unit is made up of the SiC IGBT pipe of two groups of differential concatenations and the power diode that is parallel to respectively on each SiC IGBT pipe.
The input of described input filter circuit links to each other with AC power, and output links to each other with the single-phase matrix convertor that is used for AC chopping.
Described step-down conversion circuit is high frequency transformer, is used for the single-phase matrix convertor of decompression transformation, single-phase rectifier and is attached thereto the step-down filter circuit that connects, this step-down conversion circuit includes single-phase-single-phase matrix convertor, just the same with the circuit structure of single-phase-single-phase matrix convertor in the AC chopping circuit, operation principle is identical, but by disposing the transmission rule of pwm pulse simply, can be reduced into single phase alternating current (A.C.) voltage with single-phase in the AC chopping circuit-single-phase matrix convertor output through the pulse of high frequency transformer output voltage.This measure can be so that the Design of Filter simplification of net side and back level.
Described high frequency transformer, an end of its elementary winding links to each other with the single-phase matrix convertor output that is used for AC chopping, and an end of secondary winding links to each other with the input of the single-phase matrix convertor that is used for decompression transformation.
The input of described filter circuit links to each other with the single-phase matrix convertor output that is used for decompression transformation, and the output of filter circuit links to each other with single-phase rectifier.
Described rectifier is the single-phase diode rectifier of not controlling that four diodes are formed.
Described waveform transformation circuit comprises: contrary type switch, inductance and the power diode of leading that the Y font connects, this waveform transformation circuit is based on the Single-phase PFC notion, adopt modulation algorithms such as two closed-loop controls, monocycle control, the equivalent load that can accomplish its input is just for resistive, thereby the input equivalent load of guaranteeing the AC chopping circuit is resistive.Step-up DC-DC converter can also be designed to multistage staggered operation or parallel running, the bring to power grade.
Described inversion filter circuit comprises: the electrochemical capacitor of cascade, single-phase inverter and output filter circuit successively.
Described single-phase inverter is the contrary single-phase voltage source inventer of leading type switch composition of four bridge joints.
The input of described output filter circuit links to each other with the output of single-phase inverter, and the output of filter circuit links to each other with zero line with the live wire of output AC voltage respectively.
The present invention uses the electric power electric transformer based on SiC IGBT to replace traditional distribution transformer, adopts the Technics of Power Electronic Conversion technology that energy is changed and controlled.Has novel, advantage such as system bulk is little, net side power-factor improvement, environment protecting are good.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 a is the schematic diagram of single-phase matrix convertor M1.
Fig. 2 b is the schematic diagram of single-phase matrix convertor M2.
Fig. 2 c is the schematic diagram of single-phase rectifier B1.
Fig. 2 d is the schematic diagram of single-phase inverter I1.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: AC chopping circuit 1, and step-down conversion circuit 2, waveform transformation circuit 3 and inversion filter circuit 4, wherein: convert the high pressure power frequency ac voltage to high frequency pulse AC voltage in the AC chopping circuit 1.In the step-down conversion circuit 2, with the filtering of high-frequency impulse High AC voltage and be converted to low-voltage dc voltage.In the waveform transformation circuit 3, improve net top-cross stream voltage and current waveform, guarantee good power factor.In the inversion filter circuit 4, with the low-voltage dc voltage inversion and be filtered into the industrial frequency AC sine voltage.
Described AC chopping circuit 1 comprises: input filter circuit and the single-phase matrix convertor M1 that is used for AC chopping that is attached thereto, wherein: single-phase matrix convertor M1 comprises that input filter circuit comprises first inductance L 1 that is in series with the AC chopping circuit input end and first capacitor C 1 that is in parallel with the AC chopping circuit input end.
Shown in Fig. 2 a, described single-phase matrix convertor M1 comprises eight SiC IGBT S1～S8 and eight power diode D1～D8, constitute single-phase converter unit U1, U2, U3 and the U4 of four bridge joints, each single-phase converter unit is formed U1:S1, D1, S2 and D2 by the SiC IGBT insulated gate bipolar transistor of two reverse series connection and corresponding with it power diode in parallel, U2:S3, D3, S4 and D4, U3:S5, D5, S6 and D6, U4:S7, D7, S8 and D8
Described input filter circuit comprises: first inductance L 1 that is in series with the AC chopping circuit input end and first capacitor C 1 that is in parallel with single-phase matrix convertor M1 input.
Described step-down filter circuit 2 comprises: Chuan Lian high frequency transformer T1 successively, single-phase matrix convertor M2, step-down filter circuit and single-phase rectifier B1 circuit, wherein: the elementary winding of high frequency transformer T1 links to each other with the output of AC chopping circuit 1, its secondary winding links to each other with the input of single-phase matrix convertor M2, the output of single-phase matrix convertor M2 links to each other with the input of step-down filter circuit, the step-down filter circuit comprises second inductance L 2 and the capacitor C 2 that is in parallel with single-phase rectifier B1 input, and single-phase rectifier B1 output links to each other with the input of waveform transformation circuit 3.
Described high frequency transformer T1, an end of its elementary winding links to each other with the output of single-phase matrix convertor M1, and an end of secondary winding links to each other with the input of single-phase matrix convertor M2.
Shown in Fig. 2 b, described single-phase matrix convertor M2 comprises eight SiC IGBT S9～S16 and eight power diode D9～D16, constitute the single-phase converter unit U5 of four bridge joints, U6, U7 and U8, each single-phase converter unit is formed U5:S9 by the SiC IGBT insulated gate bipolar transistor of two reverse series connection and corresponding with it power diode in parallel, D9, S10 and D10, U6:S11, D11, S12 and D12, U7:S13, D13, S14 and D14, U8:S15, D15, S15 and D15
The input of described step-down filter circuit links to each other with the output of single-phase matrix convertor M2, and the output of step-down filter circuit links to each other with the input of single-phase rectifier B1.
Shown in Fig. 2 c, described single-phase rectifier B1 is the single-phase diode rectifier of not controlling, and forms D17～D20 by the diode of four bridge joints, diode D17, and D18 constitutes a brachium pontis, and diode D19, D20 constitute another brachium pontis.
As shown in Figure 1, described waveform transformation circuit 3 comprises: contrary type switch S 17, inductance L 3 and the power diode D21 of leading that the Y font connects.
Described inversion filter circuit 4 comprises: electrochemical capacitor E1, single-phase inverter I1 and be attached thereto output filter circuit L4, L5 and the C3 that connects, electrochemical capacitor E1 links to each other with the input of single-phase inverter I1, single-phase inverter I1 links to each other with the input of output filter circuit L4, L5 and C3, and the output of output filter circuit L4, L5 and C3 is connected to exchange to be exported.
Shown in Fig. 2 d, described single-phase inverter I1 is the single-phase voltage source inventer, leads the type switch by four bridge joints contrary and forms S18～S21, and the contrary type switch S 18～S19 that leads constitutes a brachium pontis, constitutes another brachium pontis against leading type switch S 20～S21,
Described output filter circuit comprises: mutually the 4th inductance L 4 of series connection and the 5th inductance L 5 and the 3rd capacitor C 3, the five inductance L 5 that are connected with the 4th inductance L 4, the 5th inductance L 5 common points and the output of the 3rd capacitor C 3 are the output of described converter.
Single-phase matrix convertor M1, M2 described in the present embodiment and high frequency transformer T1 have formed the prime ac buck conversion of electric power electric transformer, its effect is by improving the operating frequency of AC/AC converter, realize comparing the target that the conventional transformer volume reduces, weight lightens, thereby significantly reduce the size and the weight of passive device.
In this example: the single phase alternating current (A.C.) input voltage is 10kV, single-phase matrix convertor M1, M2, high frequency transformer T1 and single-phase rectification bridge B1 are transformed to direct current 400VDC with 10kVDC, single-phase inverter I1 is traditional voltage source inverter, direct current 400VDC is transformed to the alternating current of 50Hz, 220V, and the electrochemical capacitor electric pressure of its input parallel connection is 400V.
After this device adopts AC chopping circuit, step-down conversion circuit and waveform transformation circuit, can be so that the net side of converters be operated under the unity power factor, the harmonic carcellation electric current is to the pollution of electrical network, make simultaneously before the inverter circuit that the reactive current content of each point is reduced to zero point on the circuit, help simplifying circuit design, reduce cost, increase efficient and improve reliability.Simultaneously because AC chopping circuit, step-down conversion circuit and waveform transformation circuit structure are simple, the control algolithm maturation implements very easyly, is convenient to commercialization and applies.AC chopping circuit, step-down conversion circuit can adopt same modulation algorithm.This routine converters can also be generalized to the application scenario of three-phase high-voltage alternating voltage input.
Claims (10)
1. the single phase alternating current (A.C.) converter of an interstage exchange voltage, comprise: the AC chopping circuit of cascade successively, step-down conversion circuit, waveform transformation circuit and inversion filter circuit, it is characterized in that: the AC chopping circuit converts the high pressure power frequency ac voltage high frequency pulse AC voltage to and exports step-down conversion circuit to, step-down conversion circuit is with the filtering of high-frequency impulse High AC voltage and be converted to low-voltage dc voltage and export the waveform transformation circuit to, the waveform transformation circuit improves net top-cross stream voltage and current waveform and exports low-voltage dc voltage to the inversion filter circuit, and the inversion filter circuit is with the low-voltage dc voltage inversion and be filtered into the industrial frequency AC sine voltage.
2. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 1 is characterized in that, described AC chopping circuit comprises: be used for the single-phase matrix convertor of AC chopping and be attached thereto the input filter circuit that connects.
3. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 2, it is characterized in that, the described single-phase matrix convertor that is used for AC chopping is made up of the single-phase converter unit of four bridge joints, and each single-phase converter unit is made up of the SiC IGBT pipe of two groups of differential concatenations and the power diode that is parallel to respectively on each SiC IGBT pipe.
4. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 2 is characterized in that the input of described input filter circuit links to each other with AC power, and output links to each other with the single-phase matrix convertor that is used for AC chopping.
5. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 1 is characterized in that, described step-down conversion circuit is high frequency transformer, is used for the single-phase matrix convertor of decompression transformation, single-phase rectifier and is attached thereto the step-down filter circuit that connects.
6. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 5, it is characterized in that, described high frequency transformer, one end of its elementary winding links to each other with the single-phase matrix convertor output that is used for AC chopping, and an end of secondary winding links to each other with the input of the single-phase matrix convertor that is used for decompression transformation.
7. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 5, it is characterized in that, the input of described step-down filter circuit links to each other with the single-phase matrix convertor output that is used for decompression transformation, and the output of step-down filter circuit links to each other with single-phase rectifier.
8. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 5 is characterized in that, described rectifier is the single-phase diode rectifier of not controlling that four diodes are formed.
9. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 1 is characterized in that, described waveform transformation circuit comprises: contrary type switch, inductance and the power diode of leading that the Y font connects.
10. the single phase alternating current (A.C.) converter of interstage exchange voltage according to claim 9 is characterized in that, described single-phase inverter is the contrary single-phase voltage source inventer of leading type switch composition of four bridge joints.
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| CN2010102824084A CN101924476B (en) | 2010-09-16 | 2010-09-16 | Single-phase alternating current converter of intermediate alternating current voltage |
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| CN2010102824084A CN101924476B (en) | 2010-09-16 | 2010-09-16 | Single-phase alternating current converter of intermediate alternating current voltage |
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| CN101924476B CN101924476B (en) | 2012-11-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185496A (en) * | 2011-05-20 | 2011-09-14 | 上海交通大学 | AC-DC converter with bidirectional energy flow |
| CN102638032A (en) * | 2012-04-10 | 2012-08-15 | 上海交通大学 | Arc suppression coil device on basis of single-phase matrix converter |
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| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| CN200990567Y (en) * | 2006-11-16 | 2007-12-12 | 上海海事大学 | Combined efficient three phase DC/AC inverted circuit |
| CN101505107A (en) * | 2009-01-20 | 2009-08-12 | 华南理工大学 | Low voltage stress single-stage AC-DC converter based on LLC series resonance |
| CN101707443A (en) * | 2009-11-20 | 2010-05-12 | 中国电力科学研究院 | Novel electric power electric transformer |
-
2010
- 2010-09-16 CN CN2010102824084A patent/CN101924476B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| CN200990567Y (en) * | 2006-11-16 | 2007-12-12 | 上海海事大学 | Combined efficient three phase DC/AC inverted circuit |
| CN101505107A (en) * | 2009-01-20 | 2009-08-12 | 华南理工大学 | Low voltage stress single-stage AC-DC converter based on LLC series resonance |
| CN101707443A (en) * | 2009-11-20 | 2010-05-12 | 中国电力科学研究院 | Novel electric power electric transformer |
Non-Patent Citations (1)
| Title |
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| 《电气传动》 20070831 董德智 基于交-交-交变换型结构的电力电子变压器研究 第48-50,64页 2-7 第26卷, 第8期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185496A (en) * | 2011-05-20 | 2011-09-14 | 上海交通大学 | AC-DC converter with bidirectional energy flow |
| CN102638032A (en) * | 2012-04-10 | 2012-08-15 | 上海交通大学 | Arc suppression coil device on basis of single-phase matrix converter |
| CN102638032B (en) * | 2012-04-10 | 2015-01-28 | 上海交通大学 | Arc suppression coil device on basis of single-phase matrix converter |
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| CN101924476B (en) | 2012-11-07 |
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