CN101950965A - Single-phase and three-phase dual-buck type half-bridge parallel active power filter - Google Patents

Single-phase and three-phase dual-buck type half-bridge parallel active power filter Download PDF

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CN101950965A
CN101950965A CN2010102551829A CN201010255182A CN101950965A CN 101950965 A CN101950965 A CN 101950965A CN 2010102551829 A CN2010102551829 A CN 2010102551829A CN 201010255182 A CN201010255182 A CN 201010255182A CN 101950965 A CN101950965 A CN 101950965A
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phase
inductance
filter
semiconductor
oxide
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陈仲
石磊
陈淼
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/20—Active power filtering [APF]

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Abstract

The invention provides a dual-buck type half-bridge parallel active power filter, belonging to the technical field of power harmonic suppression. The dual-buck type half-bridge parallel active power filter respectively comprises two types of power filter structures used for a single-phase power grid system and a three-phase four-wire system power grid system, and further comprises a bridge arm unit formed by connecting a power tube and a diode in series, parallel double inductors on an active power filter AC (Alternating Current) side, and serial double capacitors on an active power filter DC (Direct Current) side. The invention not only has the advantages of simple structure and easy control, but also can avoid the danger of the shoot-through bridge arm, simultaneously has an excellent filtering property, and can be widely applied to aviation, spaceflight, military equipment manufacture and other industries with high requirements on power supply quality of a power grid and system reliability.

Description

Single-phase, three-phase dual-buck half-bridge parallel connection type active electric filter
Technical field:
The present invention relates to a kind of dual-buck half-bridge parallel connection type active electric filter, belong to electric harmonic and suppress technical field, be applicable to the using electricity system of various high reliability request.
Background technology:
Develop rapidly along with power electronic technology, the particularly development of power semiconductor and Semiconductor Converting Technology, therefore and " electric network pollution " that produce constitutes potential threat to safe, the stable and economical operation of network system various power electronic equipments obtain extensive use in the every profession and trade field, but.Active Power Filter-APF is to generally acknowledge the most effective means of the comprehensive regulation " electric network pollution ", and wherein shunt active power filter at present and the following status that all will occupy main flow.Begun on industry and civil equipment, to be extensive use of Active Power Filter-APF in the world, and its capacity progressively improves, function also from strength to strength not only can the compensation harmonic electric current, also has functions such as compensation fundamental wave reactive power, balanced three-phase voltage, inhibition voltage flicker.Parallel connection type active electric filter has developed multiple topological mode up to now, the basic composition unit mainly adopts the half-bridge or the full bridge structure of dual switch series connection, switching tube may cause the problem of bridge arm direct pass when HF switch is worked, influence the stability and the reliability of system, increasing the switch dead band simultaneously also can influence the filtering characteristic of Active Power Filter-APF, and it is difficult to be used widely in the network system of high reliability request.Therefore, how when not losing the Active Power Filter-APF filtering characteristic, to improve its reliability, significant to the development of Active Power Filter-APF with application.
Summary of the invention
Goal of the invention:
The network system that the objective of the invention is to high reliability request is that object is at the deficiencies in the prior art, a kind of dual-buck half-bridge parallel connection type active electric filter is proposed, by power tube and diode are composed in series bridge arm unit, stop the danger of bridge arm direct pass effectively, have good harmonic compensation characteristic simultaneously.
Technical scheme:
The present invention adopts following technical scheme for achieving the above object:
Scheme one is applicable to single-phase network system:
A kind of single-phase dual-buck half-bridge parallel connection type active electric filter, described Active Power Filter-APF is connected with the positive and negative busbar of AC network, also comprises filter inductance, nonlinear load between the positive and negative busbar of described AC network; Described AC network, nonlinear load are respectively single phase poaer supply and single-phase load, wherein the positive output end of Active Power Filter-APF is connected with the positive bus-bar of AC network, the input of filter inductance respectively, the output of filter inductance is connected with the input of nonlinear load, and the output of nonlinear load connects the negative output terminal of Active Power Filter-APF, the negative busbar of AC network respectively; It is characterized in that: described Active Power Filter-APF comprises filter main circuit, voltage and current detecting device, FILTER TO CONTROL and drive circuit; Wherein the dc bus of the output of the output of the input of the positive and negative busbar of AC network, filter inductance, nonlinear load, active filter main circuit, filter main circuit is connected with the input of voltage and current detecting device respectively, the output of voltage and current detecting device is connected with the input of FILTER TO CONTROL and drive circuit, and the output of FILTER TO CONTROL and drive circuit is connected with the input of filter main circuit;
Described filter main circuit comprises AC side two inductance in parallel, first bridge arm unit, second bridge arm unit and the two electric capacity of DC side; Wherein, described AC side two inductance in parallel comprise first inductance L 1, second inductance L 2First inductance L wherein 1An end, second inductance L 2An end link to each other as the positive output end of filter main circuit, link to each other with the positive bus-bar of AC network; First inductance L 1The other end link to each other second inductance L with the mid point of first bridge arm unit 2The other end link to each other with the mid point of second bridge arm unit;
The two electric capacity of described DC side comprise first capacitor C 1, second capacitor C 2First capacitor C 1An end, second capacitor C 2An end be connected as the negative output terminal of filter main circuit, link to each other with the negative busbar of AC network; Described first capacitor C 1The other end, second capacitor C 2The other end connect the direct current positive and negative busbar of filter main circuit respectively.
Further, first bridge arm unit of above-mentioned single-phase dual-buck half-bridge parallel connection type active electric filter comprises the first metal-oxide-semiconductor S 1, the first diode D 1Described second bridge arm unit comprises the second metal-oxide-semiconductor S 2, the second diode D 2The first metal-oxide-semiconductor S wherein 1The source electrode and the first diode D 1Negative electrode link to each other the second metal-oxide-semiconductor S 2The drain electrode and the second diode D 2Anode connect; The first metal-oxide-semiconductor S 1Drain electrode, the second diode D 2Negative electrode be connected with the direct current positive bus of filter main circuit respectively; The second metal-oxide-semiconductor S 2Source electrode, the first diode D 1Anode be connected with the direct current negative busbar of filter main circuit respectively.
Further, the voltage and current detecting device of above-mentioned single-phase dual-buck half-bridge parallel connection type active electric filter comprises n voltage sensor and m current sensor, and wherein n, m are positive integer; Described FILTER TO CONTROL and drive circuit comprise harmonic wave detection calculations circuit, PWM current control circuit and the drive circuit that order links to each other.
Further, first inductance L in the AC side of above-mentioned single-phase dual-buck half-bridge parallel connection type active electric filter two inductance in parallel 1, second inductance L 2Sense value identical, first capacitor C in the two electric capacity of DC side 1, second capacitor C 2Appearance value identical.
Scheme two is applicable to the three-phase four-wire system network system:
A kind of three-phase dual-buck half-bridge parallel connection type active electric filter, described Active Power Filter-APF is connected with the bus of AC network, and described AC network is a three phase mains, and the bus of described AC network is connected with three-phase filter inductance, threephase load respectively; Wherein the output of Active Power Filter-APF is connected with the bus of three phase mains, the input of three-phase filter inductance respectively, and the output of three-phase filter inductance is connected with the input of threephase load, and the output of threephase load is connected with the center line of three phase mains; Described Active Power Filter-APF comprises filter main circuit, voltage and current detecting device, FILTER TO CONTROL and drive circuit; Wherein the dc bus of the output of the input of the center line of the bus of three phase mains, three phase mains, three-phase filter inductance, active filter main circuit, active filter main circuit is connected with the input of voltage and current detecting device respectively, the output of voltage and current detecting device is connected with the input of FILTER TO CONTROL and drive circuit, and the output of FILTER TO CONTROL and drive circuit is connected with the input of filter main circuit;
Described filter main circuit comprises AC side two inductive circuits in parallel, first bridge arm unit, second bridge arm unit and the two electric capacity of DC side;
Wherein, described AC side two inductive circuits in parallel comprise an A phase inductance L 1A, the 2nd A phase inductance L 2A, a B phase inductance L 1B, the 2nd B phase inductance L 2B, a C phase inductance L 1C, the 2nd C phase inductance L 2CDescribed first bridge arm unit, second bridge arm unit comprise the brachium pontis of three parallel connections respectively; An A phase inductance L wherein 1A, the 2nd A phase inductance L 2AAn end link to each other as the A phase output terminal of filter main circuit, the A of A phase output terminal and described three phase mains bus mutually links to each other; The one A phase inductance L 1AThe other end link to each other the 2nd A phase inductance L with the mid point of first brachium pontis in first bridge arm unit 2AThe other end link to each other with the mid point of first brachium pontis in second bridge arm unit;
A described B phase inductance L 1B, the 2nd B phase inductance L 2BAn end link to each other as the B phase output terminal of filter main circuit, the B of B phase output terminal and described three phase mains bus mutually links to each other; The one B phase inductance L 1BThe other end link to each other the 2nd B phase inductance L with the mid point of second brachium pontis in first bridge arm unit 2BThe other end link to each other with the mid point of second brachium pontis in second bridge arm unit;
A described C phase inductance L 1C, the 2nd C phase inductance L 2CAn end link to each other as the C phase output terminal of filter main circuit, the C of C phase output terminal and described three phase mains bus mutually links to each other; The one C phase inductance L 1CThe other end link to each other the 2nd C phase inductance L with the mid point of the 3rd brachium pontis in first bridge arm unit 2CThe other end link to each other with the mid point of the 3rd brachium pontis in second bridge arm unit;
The two electric capacity of described DC side comprise first capacitor C 1, second capacitor C 2First capacitor C 1An end, second capacitor C 2An end be connected as the output of the center line of filter main circuit, link to each other first capacitor C with the center line of AC network 1The other end, second capacitor C 2The other end connect the direct current positive and negative busbar of filter main circuit respectively.
Further, first brachium pontis of first bridge arm unit of above-mentioned three-phase dual-buck half-bridge parallel connection type active electric filter comprises an A phase metal-oxide-semiconductor S 1A, an A diode phase D 1ASecond brachium pontis of first bridge arm unit comprises a B phase metal-oxide-semiconductor S 1B, a B diode phase D 1BThe 3rd brachium pontis of first bridge arm unit comprises a C phase metal-oxide-semiconductor S 1C, a C diode phase D 1CAn A phase metal-oxide-semiconductor S wherein 1AA source electrode and an A diode phase D 1ANegative electrode link to each other a B phase metal-oxide-semiconductor S 1BA source electrode and a B diode phase D 1BNegative electrode link to each other a C phase metal-oxide-semiconductor S 1CA source electrode and a C diode phase D 1CNegative electrode link to each other;
First brachium pontis of described second bridge arm unit comprises the 2nd A phase metal-oxide-semiconductor S 2A, the 2nd A diode phase D 2A, second brachium pontis of second bridge arm unit comprises the 2nd B phase metal-oxide-semiconductor S 2B, the 2nd B diode phase D 2B, the 3rd brachium pontis of second bridge arm unit comprises the 2nd C phase metal-oxide-semiconductor S 2C, the 2nd C diode phase D 2C, the 2nd A phase metal-oxide-semiconductor S wherein 2ADrain electrode and the 2nd A diode phase D 2AAnode connect the 2nd B phase metal-oxide-semiconductor S 2BDrain electrode and the 2nd B diode phase D 2BAnode connect the 2nd C phase metal-oxide-semiconductor S 2CDrain electrode and the 2nd C diode phase D 2CAnode connect;
A described A phase metal-oxide-semiconductor S 1ADrain electrode, a B phase metal-oxide-semiconductor S 1BDrain electrode, a C phase metal-oxide-semiconductor S 1CDrain electrode, the 2nd A diode phase D 2ANegative electrode, the 2nd B diode phase D 2BNegative electrode, the 2nd C diode phase D 2CNegative electrode be connected described the 2nd A phase metal-oxide-semiconductor S respectively with the direct current positive bus of filter main circuit 2ASource electrode, the 2nd B phase metal-oxide-semiconductor S 2BSource electrode, the 2nd C phase metal-oxide-semiconductor S 2CSource electrode, an A diode phase D 1AAnode, a B diode phase D 1BAnode, a C diode phase D 1CAnode be connected with the direct current negative busbar of filter main circuit respectively.
Further, the voltage and current detecting device of above-mentioned three-phase dual-buck half-bridge parallel connection type active electric filter comprises n voltage sensor and m current sensor, and wherein n, m are positive integer; Described FILTER TO CONTROL and drive circuit comprise harmonic wave detection calculations circuit, PWM current control circuit and the drive circuit that order links to each other.
Further, an A phase inductance L in the AC side of above-mentioned three-phase dual-buck half-bridge parallel connection type active electric filter two inductive circuits in parallel 1A, the 2nd A phase inductance L 2A, a B phase inductance L 1B, the 2nd B phase inductance L 2B, a C phase inductance L 1C, the 2nd C phase inductance L 2CThe sense value all equate first capacitor C in the two electric capacity of DC side 1, second capacitor C 2Appearance value identical.
Beneficial effect:
1. with respect to traditional parallel connection type active electric filter, the danger that when guaranteeing good harmonic compensation characteristic, can stop bridge arm direct pass, thus improve the reliability of active power filtering system;
2. with respect to traditional parallel connection type active electric filter, can optimize power switch pipe and power diode respectively, thereby reduce switching loss, create conditions, so that improve filter harmonic compensation characteristic for further improving switching frequency;
3. with respect to traditional parallel connection type active electric filter, need not to be provided with Dead Time, control more simply, reduce Active Power Filter-APF self and produce high-frequency harmonic;
4. can be widely used in the harmonic wave control of single-phase network system and three-phase four-wire system network system.
Description of drawings:
Below in conjunction with drawings and Examples patent of the present invention is further specified.
Fig. 1 is a single-phase dual-buck half-bridge parallel connection type active electric filter structural representation of the present invention.
Number in the figure: 1-AC network, 2-filter inductance, 3-nonlinear load, 4-filter main circuit, 5-AC side two inductance in parallel, 6-first bridge arm unit, 7-second bridge arm unit, the two electric capacity of 8-DC side, 9-voltage and current detecting device, 10-control and drive circuit thereof.
Fig. 2 is a three-phase four-wire system dual-buck half-bridge parallel connection type active electric filter structural representation of the present invention.
Number in the figure: 11-AC network, 22-three-phase filter inductance, 33-threephase load, 44-filter main circuit, 55-AC side two inductance in parallel, 66-first bridge arm unit, 77-second bridge arm unit, the two electric capacity of 88-DC side, 99-voltage and current detecting device, 101-control and drive circuit thereof.
Fig. 3 is line voltage, power network current and the offset current simulation waveform that the present invention is applied to the 115V/400Hz electrical network.
Specific embodiments:
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme:
Embodiment 1
Accompanying drawing 1 is a single-phase dual-buck half-bridge parallel connection type active electric filter structural representation of the present invention.
AC network 1, nonlinear load 3 are respectively single phase poaer supply and single-phase load; AC network 1 positive bus-bar serial connection filter inductance 2 back input nonlinear loads 3; Active Power Filter-APF main circuit 4 comprises AC side two inductance 5 in parallel, first bridge arm unit 6, second bridge arm unit 7 and two electric capacity 8 four parts of DC side; AC side two inductance 5 one ends in parallel link to each other as Active Power Filter-APF positive output, link to each other with AC network 1 positive bus-bar, and all the other two ends link to each other with second bridge arm unit, 7 mid points with first bridge arm unit 6 respectively; The two electric capacity 8 series connection mid points of DC side series connection link to each other with AC network 1 negative busbar as the Active Power Filter-APF negative output, and all the other two ends are connected to the positive and negative dc bus of source electric-power filter respectively; Voltage and current detecting device 9 comprises a plurality of voltage sensors and current sensor, many inputs link to each other with filter inductance 2 input sides, AC network 1 positive and negative busbar, the positive and negative outlet side of Active Power Filter-APF and the positive and negative dc bus of Active Power Filter-APF respectively, output load current, line voltage, power network current, offset current and dc capacitor voltage link to each other with Active Power Filter-APF control and drive circuit 10 thereof; Control and drive circuit 10 thereof are made of harmonic wave detection calculations circuit, PWM Current Control and drive circuit, voltage and current detecting device 9 output signals are compensated current reference signal by harmonic wave detection calculations circuit, through PWM Current Control link output control signal, drive circuit amplifies isolation to control signal, is input to first bridge arm unit 6 of Active Power Filter-APF and the metal-oxide-semiconductor grid of second bridge arm unit 7.The ac output end of Active Power Filter-APF produces corresponding harmonic current and is injected into electrical network elimination power network current harmonic wave.
In the foregoing description, L in AC side two inductance 5 in parallel 1, L 2The sense value is identical, C in the two electric capacity 8 of DC side series connection 1, C 2The appearance value is identical; First bridge arm unit 6 and second bridge arm unit 7 all comprise a metal-oxide-semiconductor and a diode: metal-oxide-semiconductor S in first bridge arm unit 6 1Source electrode and diode D 1Negative electrode links to each other, metal-oxide-semiconductor S 1Drain electrode connects positive direct-current bus, diode D 1Anode connects negative dc bus, metal-oxide-semiconductor S 1With diode D 1Tie point two inductance 5 in parallel with AC side in L 1Input links to each other; Metal-oxide-semiconductor S in second bridge arm unit 7 2Drain electrode and diode D 2Anode links to each other, metal-oxide-semiconductor S 2Source electrode connects negative dc bus, diode D 2Negative electrode connects the positive direct-current bus, metal-oxide-semiconductor S 2With diode D 2Tie point two inductance 5 in parallel with AC side in L 2Input links to each other.The connected mode of bridge arm unit can be avoided bridge arm direct pass, simultaneously, is connected with AC side inductance 5 in parallel two between first bridge arm unit 6 and second bridge arm unit, 7 mid points, makes the danger that does not also have bridge arm direct pass between the switching tube.
Embodiment 2
Accompanying drawing 2 is three-phase four-wire system dual-buck half-bridge parallel connection type active electric filter structural representations of the present invention.
AC network 11, nonlinear load 33 are respectively three phase mains and three-phase phase load; AC network 11 three-phase alternating current buses serial connection filter inductance 22 back input nonlinear loads 33; Active Power Filter-APF main circuit topology 44 comprises AC side two inductance 55 in parallel, first bridge arm unit 66, second bridge arm unit 77 and two electric capacity 88 4 parts of DC side series connection; AC side two inductance 55 in parallel, A cross streams side two inductance L in parallel 1A, L 2AOne end links to each other and to export mutually as Active Power Filter-APF A, with AC network 11A mutually bus link to each other, all the other two ends respectively with A mutually first bridge arm unit 66 link to each other with second bridge arm unit, 77 mid points; B cross streams side two inductance L in parallel 1B, L 2BOne end links to each other and to export mutually as Active Power Filter-APF B, with the B of AC network 11 mutually bus link to each other, all the other two ends respectively with B mutually the mid point of first bridge arm unit 66 and second bridge arm unit 77 link to each other; C cross streams side two inductance L in parallel 1C, L 2COne end links to each other and to export mutually as Active Power Filter-APF C, with the C of AC network 11 bus phase mutually, all the other two ends respectively with C mutually the mid point of first bridge arm unit 66 and second bridge arm unit 77 link to each other; The series connection point of two 88, two electric capacity of electric capacity of DC side series connection links to each other with AC network 11 center lines as the output of Active Power Filter-APF center line, and all the other two ends connect positive and negative dc bus respectively; Voltage and current detecting device 99 comprises a plurality of voltage sensors and current sensor, output links to each other with center line with filter inductance 22 three-phase input sides, AC network 11 three-phase bus and center line, Active Power Filter-APF main circuit 44 three-phase outlet sides, the positive and negative dc bus of Active Power Filter-APF, output threephase load electric current, three phase network voltage, three phase network electric current, three-phase offset current and dc capacitor voltage link to each other with Active Power Filter-APF control and drive circuit 101 thereof; Control and drive circuit 101 thereof are made of harmonic wave detection calculations circuit, PWM Current Control and drive circuit, voltage and current detecting device 99 output signals are compensated current reference signal by harmonic wave detection calculations circuit, through PWM Current Control link output control signal, drive circuit amplifies isolation to control signal, is input to first bridge arm unit 66 of Active Power Filter-APF and the metal-oxide-semiconductor grid of second bridge arm unit 77.The ac output end of Active Power Filter-APF produces corresponding harmonic current and is injected into electrical network elimination power network current harmonic wave.
In the foregoing description, L in AC side two inductance 55 in parallel 1A, L 2A, L 1B, L 2B, L 1C, L 2CThe sense value all equates, C in the two electric capacity 88 of DC side series connection 1, C 2The appearance value is identical; First bridge arm unit 66 and second bridge arm unit 77 all comprise three metal-oxide-semiconductors and three diodes; In first bridge arm unit 66, metal-oxide-semiconductor S 1A, S 1B, S 1CSource electrode respectively with diode D 1A, D 1B, D 1CNegative electrode links to each other, metal-oxide-semiconductor metal-oxide-semiconductor S 1A, S 1B, S 1CDrain electrode all connects positive direct-current bus, diode D 1A, D 1B, D 1CAnode all connects negative dc bus, metal-oxide-semiconductor S 1AWith diode D 1A, metal-oxide-semiconductor S 1BWith diode D 1B, metal-oxide-semiconductor S 1CWith diode D 1CTie point two inductance 5 in parallel with AC side respectively in L 1A, L 1B, L 1CInput links to each other; In second bridge arm unit 77, metal-oxide-semiconductor S 2A, S 2B, S 2CThe drain electrode respectively with diode D 2A, D 2B, D 2CAnode links to each other, metal-oxide-semiconductor metal-oxide-semiconductor S 2A, S 2B, S 2CSource electrode all connects negative dc bus, diode D 2A, D 2B, D 2CNegative electrode all connects the positive direct-current bus.Metal-oxide-semiconductor S 2AWith diode D 2A, metal-oxide-semiconductor S 2BWith diode D 2B, metal-oxide-semiconductor S 2CWith diode D 2CTie point two inductance 55 in parallel with AC side respectively in L 2A, L 2B, L 2CInput links to each other.The connected mode of bridge arm unit can be avoided bridge arm direct pass, and simultaneously, each mutually is connected with AC side two inductance 55 in parallel between first bridge arm unit 66 and second bridge arm unit, 77 mid points, makes the danger that does not also have bridge arm direct pass between the switching tube.This embodiment constitutes three-phase system by three cover phase structures, is used for the network system of three-phase four-wire system.
The operation principle of above-mentioned two embodiment is: by voltage and current detecting device detection of grid voltage, load voltage, dc capacitor voltage and offset current, wherein line voltage and load voltage signal input harmonics detection calculations circuit, be compensated current reference signal through harmonic wave and idle detection algorithm, compensating current signal input PWM Current Control link with offset current reference signal and sampling, just can obtain the SPWM control signal, final control signal amplifies through isolating, and drive signal is sent into the grid of each power tube.
Under the MATLAB software environment, the present invention simulation model and waveform analysis have been set up.Accompanying drawing 3 is line voltage, power network current and offset current simulation waveforms that the present invention is applied to the 115V/400Hz electrical network.Find that by emulation circuit topology of the present invention has good harmonic compensation characteristic, power network current does not contain harmonic wave and idle component after overcompensation, power network current THD only is 2.97%, simulation result shows: the present invention can better realize power network harmonic wave management, has improved the operational reliability of active power filtering system simultaneously.
The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection range of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.

Claims (8)

1. single-phase dual-buck half-bridge parallel connection type active electric filter, described Active Power Filter-APF is connected with the positive and negative busbar of AC network (1), also comprises filter inductance (2), nonlinear load (3) between the positive and negative busbar of described AC network (1); Described AC network (1), nonlinear load (3) are respectively single phase poaer supply and single-phase load, wherein the positive output end of Active Power Filter-APF is connected with the positive bus-bar of AC network (1), the input of filter inductance (2) respectively, the output of filter inductance (2) is connected with the input of nonlinear load (3), and the output of nonlinear load (3) connects the negative busbar of the negative output terminal of Active Power Filter-APF, AC network (1) respectively; It is characterized in that: described Active Power Filter-APF comprises filter main circuit (4), voltage and current detecting device (9), FILTER TO CONTROL and drive circuit (10); Wherein the dc bus of the output of the output of the input of the positive and negative busbar of AC network (1), filter inductance (2), nonlinear load (3), active filter main circuit (4), filter main circuit (4) is connected with the input of voltage and current detecting device (9) respectively, the output of voltage and current detecting device (9) is connected with the input of FILTER TO CONTROL and drive circuit (10), and the output of FILTER TO CONTROL and drive circuit (10) is connected with the input of filter main circuit (4);
Described filter main circuit (4) comprises AC side two inductance (5) in parallel, first bridge arm unit (6), second bridge arm unit (7) and the two electric capacity (8) of DC side; Wherein, described AC side two inductance (5) in parallel comprise first inductance L 1, second inductance L 2First inductance L wherein 1An end, second inductance L 2An end link to each other as the positive output end of filter main circuit (4), link to each other with the positive bus-bar of AC network (1); First inductance L 1The other end link to each other second inductance L with the mid point of first bridge arm unit (6) 2The other end link to each other with the mid point of second bridge arm unit (7);
The two electric capacity (8) of described DC side comprise first capacitor C 1, second capacitor C 2First capacitor C 1An end, second capacitor C 2An end be connected as the negative output terminal of filter main circuit (4), link to each other with the negative busbar of AC network (1); Described first capacitor C 1The other end, second capacitor C 2The other end connect the direct current positive and negative busbar of filter main circuit (44) respectively.
2. single-phase dual-buck half-bridge parallel connection type active electric filter according to claim 1 is characterized in that: described first bridge arm unit (6) comprises the first metal-oxide-semiconductor S 1, the first diode D 1Described second bridge arm unit (7) comprises the second metal-oxide-semiconductor S 2, the second diode D 2The first metal-oxide-semiconductor S wherein 1The source electrode and the first diode D 1Negative electrode link to each other the second metal-oxide-semiconductor S 2The drain electrode and the second diode D 2Anode connect; The first metal-oxide-semiconductor S 1Drain electrode, the second diode D 2Negative electrode be connected with the direct current positive bus of filter main circuit (4) respectively; The second metal-oxide-semiconductor S 2Source electrode, the first diode D 1Anode be connected with the direct current negative busbar of filter main circuit (4) respectively.
3. single-phase dual-buck half-bridge parallel connection type active electric filter according to claim 1 is characterized in that: described voltage and current detecting device (9) comprises n voltage sensor and m current sensor, and wherein n, m are positive integer; Described FILTER TO CONTROL and drive circuit (10) comprise harmonic wave detection calculations circuit, PWM current control circuit and the drive circuit that order links to each other.
4. single-phase dual-buck half-bridge parallel connection type active electric filter according to claim 1 is characterized in that: first inductance L in AC side two inductance (5) in parallel 1, second inductance L 2Sense value identical, first capacitor C in the two electric capacity (8) of DC side 1, second capacitor C 2Appearance value identical.
5. three-phase dual-buck half-bridge parallel connection type active electric filter, described Active Power Filter-APF is connected with the bus of AC network (11), described AC network (11) is a three phase mains, and the bus of described AC network (11) is connected with three-phase filter inductance (22), threephase load (33) respectively; Wherein the output of Active Power Filter-APF is connected with the bus of three phase mains, the input of three-phase filter inductance (22) respectively, the output of three-phase filter inductance (22) is connected with the input of threephase load (33), and the output of threephase load (33) is connected with the center line of three phase mains; It is characterized in that: described Active Power Filter-APF comprises filter main circuit (44), voltage and current detecting device (99), FILTER TO CONTROL and drive circuit (101); Wherein the dc bus of the output of the input of the center line of the bus of three phase mains, three phase mains, three-phase filter inductance (22), active filter main circuit (44), active filter main circuit (44) is connected with the input of voltage and current detecting device (99) respectively, the output of voltage and current detecting device (99) is connected with the input of FILTER TO CONTROL and drive circuit (101), and the output of FILTER TO CONTROL and drive circuit (101) is connected with the input of filter main circuit (44);
Described filter main circuit (44) comprises AC side two inductive circuits (55) in parallel, first bridge arm unit (66), second bridge arm unit (77) and the two electric capacity (88) of DC side;
Wherein, described AC side two inductive circuits (55) in parallel comprise an A phase inductance L 1A, the 2nd A phase inductance L 2A, a B phase inductance L 1B, the 2nd B phase inductance L 2B, a C phase inductance L 1C, the 2nd C phase inductance L 2CDescribed first bridge arm unit (66), second bridge arm unit (77) comprise the brachium pontis of three parallel connections respectively; An A phase inductance L wherein 1A, the 2nd A phase inductance L 2AAn end link to each other as the A phase output terminal of filter main circuit (44), the A of A phase output terminal and described three phase mains bus mutually links to each other; The one A phase inductance L 1AThe other end link to each other the 2nd A phase inductance L with the mid point of first brachium pontis in first bridge arm unit (66) 2AThe other end link to each other with the mid point of first brachium pontis in second bridge arm unit (77);
A described B phase inductance L 1B, the 2nd B phase inductance L 2BAn end link to each other as the B phase output terminal of filter main circuit (44), the B of B phase output terminal and described three phase mains bus mutually links to each other; The one B phase inductance L 1BThe other end link to each other the 2nd B phase inductance L with the mid point of second brachium pontis in first bridge arm unit (66) 2BThe other end link to each other with the mid point of second brachium pontis in second bridge arm unit (77);
A described C phase inductance L 1C, the 2nd C phase inductance L 2CAn end link to each other as the C phase output terminal of filter main circuit (44), the C of C phase output terminal and described three phase mains bus mutually links to each other; The one C phase inductance L 1CThe other end link to each other the 2nd C phase inductance L with the mid point of the 3rd brachium pontis in first bridge arm unit (66) 2CThe other end link to each other with the mid point of the 3rd brachium pontis in second bridge arm unit (77);
The two electric capacity (88) of described DC side comprise first capacitor C 1, second capacitor C 2First capacitor C 1An end, second capacitor C 2An end be connected as the output of the center line of filter main circuit (44), link to each other first capacitor C with the center line of AC network (11) 1The other end, second capacitor C 2The other end connect the direct current positive and negative busbar of filter main circuit (44) respectively.
6. three-phase dual-buck half-bridge parallel connection type active electric filter according to claim 5 is characterized in that: first brachium pontis of described first bridge arm unit (66) comprises an A phase metal-oxide-semiconductor S 1A, an A diode phase D 1ASecond brachium pontis of first bridge arm unit (66) comprises a B phase metal-oxide-semiconductor S 1B, a B diode phase D 1BThe 3rd brachium pontis of first bridge arm unit (66) comprises a C phase metal-oxide-semiconductor S 1C, a C diode phase D 1CAn A phase metal-oxide-semiconductor S wherein 1AA source electrode and an A diode phase D 1ANegative electrode link to each other a B phase metal-oxide-semiconductor S 1BA source electrode and a B diode phase D 1BNegative electrode link to each other a C phase metal-oxide-semiconductor S 1CA source electrode and a C diode phase D 1CNegative electrode link to each other;
First brachium pontis of described second bridge arm unit (77) comprises the 2nd A phase metal-oxide-semiconductor S 2A, the 2nd A diode phase D 2A, second brachium pontis of second bridge arm unit (77) comprises the 2nd B phase metal-oxide-semiconductor S 2B, the 2nd B diode phase D 2B, the 3rd brachium pontis of second bridge arm unit (77) comprises the 2nd C phase metal-oxide-semiconductor S 2C, the 2nd C diode phase D 2C, the 2nd A phase metal-oxide-semiconductor S wherein 2ADrain electrode and the 2nd A diode phase D 2AAnode connect the 2nd B phase metal-oxide-semiconductor S 2BDrain electrode and the 2nd B diode phase D 2BAnode connect the 2nd C phase metal-oxide-semiconductor S 2CDrain electrode and the 2nd C diode phase D 2CAnode connect;
A described A phase metal-oxide-semiconductor S 1ADrain electrode, a B phase metal-oxide-semiconductor S 1BDrain electrode, a C phase metal-oxide-semiconductor S 1CDrain electrode, the 2nd A diode phase D 2ANegative electrode, the 2nd B diode phase D 2BNegative electrode, the 2nd C diode phase D 2CNegative electrode be connected described the 2nd A phase metal-oxide-semiconductor S respectively with the direct current positive bus of filter main circuit (44) 2ASource electrode, the 2nd B phase metal-oxide-semiconductor S 2BSource electrode, the 2nd C phase metal-oxide-semiconductor S 2CSource electrode, an A diode phase D 1AAnode, a B diode phase D 1BAnode, a C diode phase D 1CAnode be connected with the direct current negative busbar of filter main circuit (44) respectively.
7. three-phase dual-buck half-bridge parallel connection type active electric filter according to claim 5 is characterized in that: described voltage and current detecting device (99) comprises n voltage sensor and m current sensor, and wherein n, m are positive integer; Described FILTER TO CONTROL and drive circuit (101) comprise harmonic wave detection calculations circuit, PWM current control circuit and the drive circuit that order links to each other.
8. three-phase dual-buck half-bridge parallel connection type active electric filter according to claim 5 is characterized in that: an A phase inductance L in AC side two inductive circuits (55) in parallel 1A, the 2nd A phase inductance L 2A, a B phase inductance L 1B, the 2nd B phase inductance L 2B, a C phase inductance L 1C, the 2nd C phase inductance L 2CThe sense value all equate first capacitor C in the two electric capacity (88) of DC side 1, second capacitor C 2Appearance value identical.
CN2010102551829A 2010-08-17 2010-08-17 Single-phase and three-phase dual-buck type half-bridge parallel active power filter Pending CN101950965A (en)

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CN103066816A (en) * 2011-10-21 2013-04-24 南京航空航天大学 Split bridge arm type series-connection active power filter
CN102611112A (en) * 2012-04-05 2012-07-25 刘明日 Management system for optimizing and improving power quality of utility power grid
CN102624001A (en) * 2012-04-20 2012-08-01 上海润珏机电科技有限公司 Hybrid electric filtering device based on triple harmonic active filter
CN102624001B (en) * 2012-04-20 2014-10-15 上海润珏机电科技有限公司 Hybrid electric filtering device based on triple harmonic active filter
CN103107720A (en) * 2012-09-05 2013-05-15 南京航空航天大学 Three-inductance and double-Buck inverter
CN103107720B (en) * 2012-09-05 2016-04-20 南京航空航天大学 A kind of three inductance dual Buck inverters
CN103474994A (en) * 2013-07-30 2013-12-25 华北电力大学 DC-side voltage control device and method for multiterminal uniform electric-energy quality controller
CN103474994B (en) * 2013-07-30 2015-08-26 华北电力大学 Multiterminal Unified Power Quality Controller DC voltage control device and method
CN104539187A (en) * 2014-12-01 2015-04-22 东北电力大学 Novel active front-end controller topological structure
CN105322545A (en) * 2015-11-27 2016-02-10 国网北京市电力公司 Filtering system used for power grid

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