CN101951163A - Single-phase alternating current converter for alternating current link - Google Patents
Single-phase alternating current converter for alternating current link Download PDFInfo
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- CN101951163A CN101951163A CN 201010283466 CN201010283466A CN101951163A CN 101951163 A CN101951163 A CN 101951163A CN 201010283466 CN201010283466 CN 201010283466 CN 201010283466 A CN201010283466 A CN 201010283466A CN 101951163 A CN101951163 A CN 101951163A
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Abstract
The invention discloses a single-phase alternating current converter for an alternating current link, comprising an alternating current chopper circuit, a voltage reduction rectification circuit, a waveform conversion circuit and a reversible filter circuit, wherein, the alternating current chopper circuit converts high-voltage power frequency alternating current voltage into high-frequency impulse alternating current voltage to be output to the voltage reduction rectification circuit; the voltage reduction rectification circuit converts and filters the high-frequency impulse alternating current voltage into low-voltage direct current voltage to be output to the waveform conversion circuit; the waveform conversion circuit improves and outputs the grid-side alternating current voltage and the current waveform to the reversible filter circuit; and the reversible filter circuit inverts and filters the low-voltage direction circuit voltage into power frequency alternating current sinusoidal wave voltage. The single-phase alternating current converter of the invention realizes the voltage conversion and the energy transmission in the power system, has the advantages of small volume, light weight, less no-load loss and the like, and does not need insulation oil.
Description
Technical field
What the present invention relates to is a kind of device of technical field of power systems, specifically is a kind of single phase alternating current (A.C.) converter that exchanges link.
Background technology
Along with power electronic technology develops rapidly, power electronics transformation of electrical energy technology has played positive and important effect at aspects such as improving alternating current-direct current driveability, all kinds of power source performances of raising and energy savings.But power electronics transformation of electrical energy The Application of Technology but becomes the main harmonic source of electrical network and power consumption equipment.Therefore, electric power electric transformer becomes the research focus of association area.。Electric power electric transformer adopts electric electronic current change technology and high frequency transformer, has the power supply reliability of raising, improves the quality of power supply and series of advantages such as volume is little, in light weight, environment protecting is good.
Find the Central China University of Science and Technology through retrieval to the electric power electric transformer prior art. electric power electric transformer. application number: 02139030.4, open day: 2003.03.12; And WANG JUN etc., disclose a kind of main by primary and secondary power inverter and get in touch the electric power electric transformer that the high frequency transformer between the two is formed among the intelligent grid technology .IEEE Trans.on Industry Electronics Magzine.2009 in June.From the input-output characteristic of electric power electric transformer, be equivalent to the AC-AC conversion.Its basic functional principle is coupled to secondary for the power-frequency voltage of input is modulated to high-frequency ac voltage through former limit converter by high frequency transformer, and the power inverter by secondary is converted into desired voltage again.The characteristics of electric power electric transformer are: it can realize the flexible control to former secondary voltage amplitude of transformer and phase place, thereby satisfies a lot of new requirements of Future Power System.
Through literature search and Cha Xin, the notion of electric power electric transformer is relatively more novel, the forward position that belongs to converters, though the time that proposes is not long, but receive publicity day by day, through analysis expert and judgement, combined with intelligent electrical network, power environment protection, development topic such as energy-saving and cost-reducing, the development prospect of electric power electric transformer is very obvious.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 that exchanges link is provided, realize voltage transformation and energy delivery in the electric power system, have that volume is little, in light weight, no-load loss is little, the wet goods advantage does not need to insulate.
The present invention is achieved by the following technical solutions, the present invention includes: the AC chopping circuit, step-down rectifying 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 rectifying circuit to, step-down rectifying circuit is changed the high-frequency impulse High AC voltage and be filtered into low-voltage dc voltage and export the waveform transformation circuit to, the waveform transformation circuit exports the inversion filter circuit to after improving net top-cross stream voltage and current waveform, 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: first filter circuit and the single-phase matrix convertor that is used for AC chopping that is attached thereto, wherein: single-phase matrix convertor comprises the single-phase converter unit of four bridge joints, and each single-phase converter unit is made up of the SiCIGBT insulated gate bipolar transistor of two reverse series connection and corresponding with it power diode in parallel; First filter circuit comprises first inductance that is in series with the AC chopping circuit input end and first electric capacity that is in parallel with the AC chopping circuit input end, this AC chopping circuit: based on single-phase-single-phase matrix convertor notion, it is a kind of circuit of AC chopping flexibly, as long as its output equivalent load is resistive, the equivalent load of its input is resistive just, can the unit's of accomplishing input power factor, and can accomplish decompression transformation, this is that other converters are incomparable.Can adopt the thought of single-phase-single-phase matrix convertor, also can adopt AC chopping pressure regulation notion.
Described step-down rectifying circuit comprises: Chuan Lian high frequency transformer, second filter circuit and single-phase rectifier successively, wherein: the elementary winding of high frequency transformer links to each other with the output of AC chopping circuit, and secondary winding links to each other with the input of second filter circuit; Second filter circuit comprises and secondary winding be in series second inductance that connects and the electric capacity that is in parallel with secondary winding.The output of second filter circuit connects the input of single-phase rectifier, and the output of single-phase rectifier connects the waveform transformation circuit of back level.Single-phase rectifier is the single-phase rectification bridge that is passed through bridge joint by the tenth～the 13 diode.
Described waveform transformation circuit comprises: the insulated gate bipolar transistor of mutual series connection and the 3rd inductance and the 9th power diode that is in parallel with insulated gate bipolar transistor, this waveform transformation circuit: based on single-phase active 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: electrochemical capacitor, single-phase inverter and be attached thereto the 3rd filter circuit that connects, and wherein: electrochemical capacitor is parallel to the output of waveform transformation circuit; Single-phase inverter is formed against leading type switch bridge joint by 4; The 3rd filter circuit comprises third and fourth inductance of mutual series connection and the 4th electric capacity that is in parallel with the 4th inductance, and the output of the 4th inductance and the 4th electric capacity is the output of described converter.
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 rectifier B1.
Fig. 2 c 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, step-down rectifying circuit 2, waveform transformation circuit 3 and inversion filter circuit 4, wherein: AC chopping circuit 1 converts the high pressure power frequency ac voltage high frequency pulse AC voltage to and exports step-down rectifying circuit 2 to, step-down rectifying circuit 2 is changed the high-frequency impulse High AC voltage and be filtered into low-voltage dc voltage and export waveform transformation circuit 3 to, waveform transformation circuit 3 exports inversion filter circuit 4 to after improving net top-cross stream voltage and current waveform, inversion filter circuit 4 is with the low-voltage dc voltage inversion and be filtered into the industrial frequency AC sine voltage.
Described AC chopping circuit 1 comprises: the first filter circuit L1 and C1 and the single-phase matrix convertor M1 that is used for AC chopping that is attached thereto, wherein: single-phase matrix convertor M1 comprises 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; The first filter circuit L1 and C1 comprise 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.
Described step-down rectifying circuit 2 comprises: Chuan Lian high frequency transformer T1, the second filter circuit L2 and C2 and single-phase rectifier B1 successively, wherein: the elementary winding of high frequency transformer T1 links to each other with the output of AC chopping circuit 1, and secondary winding links to each other with the input of the second filter circuit L2 and C2; The second filter circuit L2 and C2 comprise and secondary winding be in series second inductance L 2 that connects and the capacitor C 2 that is in parallel with secondary winding.The input of single-phase rectifier B1 connects the output of the second filter circuit L2 and C2, and the input of single-phase rectifier B1 connects waveform transformation circuit 3.Single-phase rectifier B1 is by the single-phase rectification bridge of the diode D10 of the tenth～the 13 c～D13 through bridge joint.
Described waveform transformation circuit 3 comprises: the 9th insulated gate bipolar transistor S9 and the 3rd inductance L 3 and the 9th power diode D9 that is in parallel with insulated gate bipolar transistor;
Described inversion filter circuit 4 comprises: electrochemical capacitor E1, single-phase inverter I1 and be attached thereto the 3rd filter circuit L4, L5 and the C3 that connects, and wherein: electrochemical capacitor E1 is parallel to the output of waveform transformation circuit 3; Single-phase inverter I1 is made up of 4 contrary type switch S 10, S11, S12, S13 bridge joint led; The 4th inductance L 4 that the 3rd filter circuit L4, L5 and C3 comprise mutual 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 described in the present embodiment, high frequency transformer T1, single-phase rectifier B1 and single-phase inverter I1 have formed 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, single-phase rectifier B1 and high frequency transformer T1 are transformed to 400VDC with 10kV, single-phase inverter I1 is traditional low voltage voltage source inventer, 400VDC is transformed to the alternating current of 50Hz, 220V, or other forms, its input shunt voltage grade is the electrochemical capacitor of 400V.
After present embodiment adopts AC chopping 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 and waveform transformation circuit structure are simple, the control algolithm maturation implements very easyly, is convenient to commercialization and applies.This routine converters can also be generalized to the application scenario of three-phase high-voltage alternating voltage input.
Claims (5)
1. single phase alternating current (A.C.) converter that exchanges link, it is characterized in that, the AC chopping circuit, step-down rectifying 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 rectifying circuit to, step-down rectifying circuit is changed the high-frequency impulse High AC voltage and be filtered into low-voltage dc voltage and export the waveform transformation circuit to, the waveform transformation circuit exports the inversion filter circuit to after improving net top-cross stream voltage and current waveform, 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 interchange link according to claim 1, it is characterized in that, described AC chopping circuit comprises: first filter circuit and the single-phase matrix convertor that is used for AC chopping that is attached thereto, wherein: single-phase matrix convertor comprises the single-phase converter unit of four bridge joints, and each single-phase converter unit is made up of the insulated gate bipolar transistor of two reverse series connection and corresponding with it power diode in parallel; First filter circuit comprises first inductance that is in series with the AC chopping circuit input end and first electric capacity that is in parallel with the AC chopping circuit input end.
3. the single phase alternating current (A.C.) converter of interchange link according to claim 1, it is characterized in that, described step-down rectifying circuit comprises: Chuan Lian high frequency transformer, second filter circuit and single-phase rectifier successively, wherein: the elementary winding of high frequency transformer links to each other with the output of AC chopping circuit, and secondary winding links to each other with the input of second filter circuit; Second filter circuit comprises and secondary winding be in series second inductance that connects and the electric capacity that is in parallel with secondary winding; Single-phase rectifier comprises the single-phase rectifier that four diodes constitute, the preceding output of second filter circuit, the back welding wave translation circuit of connecing.
4. the single phase alternating current (A.C.) converter of interchange link according to claim 1 is characterized in that, described waveform transformation circuit comprises: the 9th insulated gate bipolar transistor and the 3rd inductance and with the 9th power diode, form DC voltage booster circuit.
5. the single phase alternating current (A.C.) converter of interchange link according to claim 1, it is characterized in that, described inversion filter circuit comprises: electrochemical capacitor, single-phase inverter and be attached thereto the 3rd filter circuit that connects, and wherein: electrochemical capacitor is parallel to the output of waveform transformation circuit; Single-phase inverter is formed against leading type switch bridge joint by 4; The 3rd filter circuit comprises the 4th and the 5th inductance and the 3rd electric capacity, and the output of the 5th inductance and the 3rd electric capacity is the output of described converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010283466 CN101951163A (en) | 2010-09-16 | 2010-09-16 | Single-phase alternating current converter for alternating current link |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010283466 CN101951163A (en) | 2010-09-16 | 2010-09-16 | Single-phase alternating current converter for alternating current link |
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| CN101951163A true CN101951163A (en) | 2011-01-19 |
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| CN 201010283466 Pending CN101951163A (en) | 2010-09-16 | 2010-09-16 | Single-phase alternating current converter for alternating current link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186771A (en) * | 2020-10-09 | 2021-01-05 | 北京航空航天大学 | Electric energy router based on matrix converter and electric energy routing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030035305A1 (en) * | 2001-08-17 | 2003-02-20 | Toru Arai | Electroplating power supply apparatus |
| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| US20100142233A1 (en) * | 2008-12-08 | 2010-06-10 | Industrial Technology Research Institute | Power conversion device and control method thereof |
-
2010
- 2010-09-16 CN CN 201010283466 patent/CN101951163A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030035305A1 (en) * | 2001-08-17 | 2003-02-20 | Toru Arai | Electroplating power supply apparatus |
| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| US20100142233A1 (en) * | 2008-12-08 | 2010-06-10 | Industrial Technology Research Institute | Power conversion device and control method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 《电气应用》 20070719 杨兴华等 新型部分有源功率因数校正电路的分析与实现 第26卷, 第07期 2 * |
| 《自动化技术与应用》 20070825 董德智 基于交-交-交变换型结构的电力电子变压器研究 第26卷, 第08期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186771A (en) * | 2020-10-09 | 2021-01-05 | 北京航空航天大学 | Electric energy router based on matrix converter and electric energy routing method |
| CN112186771B (en) * | 2020-10-09 | 2022-11-25 | 北京航空航天大学 | Electric energy router based on matrix converter and electric energy routing method |
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Application publication date: 20110119 |