CN100525028C - Electric converter of hybrid electric filter - Google Patents
Electric converter of hybrid electric filter Download PDFInfo
- Publication number
- CN100525028C CN100525028C CNB2004100309806A CN200410030980A CN100525028C CN 100525028 C CN100525028 C CN 100525028C CN B2004100309806 A CNB2004100309806 A CN B2004100309806A CN 200410030980 A CN200410030980 A CN 200410030980A CN 100525028 C CN100525028 C CN 100525028C
- Authority
- CN
- China
- Prior art keywords
- power
- direct current
- end points
- filter
- switch group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 59
- 230000007935 neutral effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 description 10
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 230000009183 running Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Abstract
The converter comprises a power electric switch group in bridge type architecture and a DC capacitor. The invention makes a power feeder in power system possible to bypass control of the power electric switch group, and connect to one end at DC side of the electric power converter. Thus, comparing with prior art, the invented converter can use less number of power electric switch group.
Description
Technical field
The present invention is relevant for the electric energy transducer of combined power filter, and it is relevant especially to be applied to that filtering is single-phase, the electric energy transducer of the combined power filter of phase three-wire three formula, three-phase and four-line formula power-supply system harmonic current.
Background technology
Because semiconductor technology is advanced by leaps and bounds, thereby develop and many power electronics assemblies in recent years, these power electronics assemblies have good controllability, the characteristic of high pressure resistant and anti-big electric current.These assemblies are applied in the power equipment widely at present, as motor driver, arc furnace, electric car, charger and ligthing paraphernalia etc.Because the non-linear input characteristics of these power equipments, therefore produce a large amount of harmonic currents, this harmonic current causes some serious power system problems, as disturbance, voltage distortion, destruction electric power assembly and the mechanical disorder etc. of transformer superheating phenomenon, electric rotating machine.
For effective restriction harmonic pollution problem, many international research mechanism formulates the harmonic wave control test, as IEEE519-1992, IEC1000-3-5 and IEC1000-3-4 etc.Platform electricity company as for Taiwan also formulates " Harmonious Waves in Power Systems control tentative standard ", so solve the important topic that harmonic problem has become present power-supply system.
The method that solves harmonic problem traditionally adopts passive power filter, this passive power filter is made up of inductor and AC capacitor, yet passive power filter can cause resonance problems, and can cause that contiguous harmonic current injects problem, and the destruction of causing passive power filter.In addition, its filtering characteristic is subject to the system reactance influence, and be difficult to obtain good filtering effect, other solves method such as the U.S. Pat 5,977,660 and the US5 of harmonic problem, 321,598 grades adopt Active Power Filter-APF, please refer to shown in Figure 1ly, and it discloses the circuit diagram of existing Active Power Filter-APF.This power supply 1 supply three-phase power is given load 3, and this Active Power Filter-APF 8 is in parallel with this load 3, and this Active Power Filter-APF 8 comprises at least one filter inductance 80, a bridge-type electric energy transducer 81 and a direct current capacitor 82.This Active Power Filter-APF 8 will produce an offset current and inject power feeder, the harmonic current that is produced with filtering load 3.Though this Active Power Filter-APF has good filtering characteristic, yet, electric energy transducer 81 capacity of this Active Power Filter-APF 8 must be not less than the product of load harmonic current and supply voltage, therefore the capacity of the electric energy transducer 81 of this Active Power Filter-APF 8 is very big, limits its practicality because of costing an arm and a leg.
In order to solve passive power filter resonance and the contiguous harmonic current injection overload problem that causes, and the big problem that costs an arm and a leg that causes of electric energy transducer capacity of Active Power Filter-APF, and have combined power filter to be developed, as U.S. Pat 5,567,994 and US5,731,965 etc., please refer to shown in Figure 2ly, it discloses this combined power filter 9 and is formed in conjunction with an electric energy transducer 91 by a passive power filter 90.This passive power filter 90 is in order to reduce the capacity of this electric energy transducer 91, this electric energy transducer 91 is then in order to improve the filter effect of passive power filter 90, and avoid problems such as resonance and contiguous harmonic current injection, therefore, this combined power filter can be applicable in parallel with the nonlinear load of big power capacity with as harmonic filtration.
Because hybrid electric power filtering has the advantage of passive power filter and Active Power Filter-APF, at patent US5,567,994 and US5,731, when 965 combined power filters such as grade are applied in phase three-wire three formula power-supply system, this electric energy transducer all adopts the three-phase bridge framework, this three-phase bridge framework uses three jib structures, each arm contains two power electronic switch assemblies, use six power electronic switch assemblies altogether, and the present invention will propose a kind of new electric energy transducer that is applicable to combined power filter, it is single-phase no matter it is applied in, phase three-wire three formula and three-phase and four-line formula power-supply system all can reduce by an arm that is reduce by two power electronic switch assemblies than conventional architectures, and be different from tradition and utilize the direct current capacitor series connection of two identical sizes to replace the semibridge system framework of an arm electronic power switch group, and directly a power-supply system power feeder wherein is directly connected to an end of the DC side of this electric energy transducer without the control of this electronic power switch group, therefore can reduce the cost of whole combined power filter.
Summary of the invention
Main purpose of the present invention provides a kind of electric energy transducer of hybrid filter, this electric energy transducer can make a power-supply system power feeder wherein can be directly connected to the anode or the negative terminal of the DC side of this electric energy transducer without electronic power switch control, it is applied in the electronic power switch group (two electronic power switches) that the single phase poaer supply system need only the single armed framework, be applied in phase three-wire three formula power-supply system and only need the electronic power switch group (four electronic power switches) of two jib structures, being applied in three-phase and four-line formula power-supply system only needs the electronic power switch group (six electronic power switches) of three jib structures, makes this electric energy transducer have the effect that reduces the power electronic switch assembly number.
Its scheme is: a kind of combined power filter, and itself and a phase three-wire three formula power-supply system are connected in parallel, and this combined power filter is composed in series by a passive power filter and an electric energy transducer; This electric energy transducer comprises:
An electronic power switch group, it is the bridge-type framework of two arms, and each arm is formed by two electronic power switch element serial connections, these two electronic power switch element serial connection places are one and exchange end points, the electronic power switch group of this bridge-type framework has two direct current end points, described two direct current end points are connected with the anode and the negative terminal of a unique direct current capacitor in this electric energy transducer respectively, make this electronic power switch group in parallel with this direct current capacitor, this direct current capacitor is as an energy buffer, and in order to a stable DC voltage to be provided, so that supply the direct voltage of this bridge-type framework electronic power switch group;
A power feeder road of this phase three-wire three formula power-supply system is connected to a negative terminal of this direct current capacitor and a direct current end points of this electronic power switch group behind this passive power filter, or is connected to the anode of this direct current capacitor and another direct current end points of this electronic power switch group; And other two power feeders of this phase three-wire three power-supply system are connected to two these interchange end points of this electronic power switch group respectively again through this passive power filter, and the bridge-type framework that this electronic power switch group is two arms has two these interchange end points; Switch this direct voltage that this direct current capacitor provides by this electronic power switch group, inject this three power feeders,, make source current be tending towards sinusoidal wave to offset the load harmonic current so that this combined power filter produces a three-phase offset current.
Its another program is: a kind of combined power filter, and itself and a power-supply system are connected in parallel, and this combined power filter is composed in series by a passive power filter and an electric energy transducer; This electric energy transducer comprises:
An electronic power switch group, it is the bridge-type framework of an arm or three arms, and each arm is formed by two electronic power switch element serial connections, described two electronic power switch element serial connection places are one and exchange end points, the electronic power switch group of this bridge-type framework has two direct current end points, described two direct current end points are connected with the anode and the negative terminal of a unique direct current capacitor in this electric energy transducer respectively, make this electronic power switch group in parallel with this direct current capacitor, this direct current capacitor is as an energy buffer, and in order to a stable DC voltage to be provided, so that supply the direct voltage of this bridge-type framework electronic power switch group;
A neutral power feeder of this power-supply system is directly connected to the negative terminal of this direct current capacitor and a direct current end points of this electronic power switch group, or is directly connected to the anode of this direct current capacitor and another direct current end points of this electronic power switch group; And other power feeders of this power-supply system are connected to this interchange end points behind this passive power filter; Switch this direct voltage that this direct current capacitor provides by this electronic power switch group, so that this combined power filter produces a single-phase offset current or the three-phase offset current injects this other power feeders, to offset the load harmonic current, make source current be tending towards sinusoidal wave.
Wherein:
When this combined power filter was applied to a single phase poaer supply system, this electric energy transducer used the single-arm bridge type framework.
When this combined power filter was applied to a three-phase and four-line formula power-supply system, this electric energy transducer used three arm bridge-type frameworks, and this passive power filter is made of three single tuning formula filters.
Description of drawings
Fig. 1 is the circuit diagram of existing Active Power Filter-APF.
Fig. 2 is the circuit diagram of existing combined power filter.
Fig. 3 is applied to first preferred embodiment of phase three-wire three formula power-supply system for the electric energy transducer of combined power filter of the present invention.
Fig. 4 is applied to second preferred embodiment of phase three-wire three formula power-supply system for the electric energy transducer of combined power filter of the present invention.
Fig. 5 is applied to first preferred embodiment of single phase poaer supply system for the electric energy transducer of combined power filter of the present invention.
Fig. 6 is applied to second preferred embodiment of single phase poaer supply system for the electric energy transducer of combined power filter of the present invention.
Fig. 7 is applied to first preferred embodiment of three-phase and four-line formula power-supply system for the electric energy transducer of combined power filter of the present invention.
Fig. 8 is applied to second preferred embodiment of three-phase and four-line formula power-supply system for the electric energy transducer of combined power filter of the present invention.
The figure number explanation
1 power supply, 2 combined power filters, 20 passive power filters
21 electric energy transducers, 210 electronic power switch groups, 211 direct current capacitors
3 loads, 4 combined power filters, 40 passive power filters
41 electric energy transducers, 410 electronic power switch groups, 411 direct current capacitors
51 electric energy transducers, 5 combined power filters, 50 passive power filters
511 direct current capacitors, 510 electronic power switch groups, 8 Active Power Filter-APFs
80 filter inductances, 81 electric energy transducers, 82 direct current capacitors
91 electric energy transducers, 9 combined power filters, 90 passive power filters
Embodiment
Please refer to shown in Figure 3, its electric energy transducer that discloses combined power filter of the present invention is applied to first preferred embodiment of phase three-wire three formula power-supply system, the electric power of this power supply 1 supply one phase three-wire three formula is given load 3, this combined power filter 2 is in parallel with this load 3, the harmonic current that is produced in order to this load 3 of filtering.
Refer again to shown in Figure 3, the present invention is applied to the combined power filter 2 of phase three-wire three formula power-supply system, this combined power filter 2 is connected in series by a passive power filter 20 and an electric energy transducer 21 and forms, this passive power filter 20 is made up of one or more groups three-phase single tuning formula filter, this single tuned filter is composed in series by inductor and AC capacitor, it can select to be tuned at the main harmonic frequency of load, and this passive filter 20 is in order to reduce the power capacity of this electric energy transducer 21.This electric energy transducer comprises an electronic power switch group 210 and a direct current capacitor 211, this electric energy transducer 21 is in order to promoting the filter effect of this passive power filter 20, and protects this passive power filter 20 to avoid the destruction that resonance and contiguous harmonic current inject; This electronic power switch group 210 is made up of a both arms bridge-type framework, each arm comprises two electronic power switches in this both arms bridge-type framework, each electronic power switch is made up of a power crystal and a diode, this both arms bridge-type framework comprises two direct current end points and two and exchanges end points, two electronic power switch junctions are for exchanging end points in each arm bridge-type framework, these other two ends of bridge-type framework are the direct current end points, direct current capacitor 211 is connected to the direct current end points as energy buffer, and sets up a direct current voltage and supply with this electric energy transducer 21 normal runnings.Because this passive power filter 20 all comprises an AC capacitor mutually at each, and AC capacitor can effectively intercept direct voltage, so this electric energy transducer 21 only need use the electronic power switch group 210 of two arm bridge-type frameworks when being applied to phase three-wire three formula power-supply system; Power supply 1 comprises three power feeders in this phase three-wire three formula power-supply system, wantonly two power feeders in these three power feeders are respectively behind this passive power filter 20, be connected respectively to this two interchanges end points of two arm bridge-type framework electronic power switch groups 210 of this electric energy transducer 21 again, another power feeder of power supply 1 then is directly connected to the negative terminal of direct current capacitor 211 of this electric energy transducer 21 and a direct current end points of this electronic power switch group 210 behind passive power filter 20, offset current by this two-phase of switching may command of two arm bridge-type framework electronic power switch groups 210, because three-phase current and be zero in the three-phase three wire system, therefore can control the correct offset current amount that obtains if be connected to the biphase current of the electronic power switch group 210 of two arm bridge-type frameworks, then the third phase of this combined power filter also can obtain correct offset current, and this three-phase offset current the three-phase current that can make this power supply 1 be provided behind three three-phase power feeder lines is provided all is tending towards sinusoidal wave.
Please refer to shown in Figure 4, its electric energy transducer that discloses combined power filter of the present invention is applied to second preferred embodiment of phase three-wire three formula power-supply system, since the capacitor of this passive power filter 20 can intercept on the occasion of direct voltage, also can intercept the direct voltage of negative value, second preferred embodiment of this three-phase three wire system and the difference of first preferred embodiment only are that the negative terminal that phase three-wire three formula power-supply system power supply 1 power feeder wherein is directly connected to the direct current capacitor 211 of this electric energy transducer 21 after via this passive power filter 20 changes into via the anode of the direct current capacitor 211 that is directly connected to this electric energy transducer 21 behind this passive power filter 20 and another direct current end points of this electronic power switch group 210, and first preferred embodiment of its operating principle and three-phase three wire system is identical.Therefore the present invention carries the electric energy transducer that is applied to combined power filter and can save an arm (two) electronic power switch by the electric energy transducer that tradition is applied to combined power filter when being applied to phase three-wire three formula power-supply system.
Please refer to shown in Figure 5, its electric energy transducer that discloses combined power filter of the present invention is applied to first preferred embodiment of single phase poaer supply system, this power supply 1 supply one Monophase electric power is given load 3, this combined power filter 4 is in parallel with this load 3, the harmonic current that is produced in order to this load 3 of filtering.
Refer again to the combined power filter 4 that is applied to the single phase poaer supply system shown in Figure 5, this combined power filter 4 is connected in series by a passive power filter 40 and an electric energy transducer 41 and forms, this passive power filter 40 is made up of one or more groups single-phase single tuning formula filter, this single tuned filter is composed in series by inductor and AC capacitor, it can select to be tuned at the main harmonic frequency of load, and this passive filter 40 is in order to reduce the power capacity of this electric energy transducer 41.This electric energy transducer 41 comprises an electronic power switch group 410 and a direct current capacitor 411 is formed; This electric energy transducer 41 is in order to promoting the filter effect of this passive power filter 40, and protects this passive power filter 40 to avoid the destruction that resonance and contiguous harmonic current inject; This electronic power switch group 410 is made up of a single-arm bridge type framework, this single-arm bridge type framework electronic power switch group 410 comprises two electronic power switches and is connected in series and forms, each electronic power switch is made up of a power crystal and a diode, this single-arm bridge type framework comprises two direct current end points and and exchanges end points, two electronic power switch junctions are for exchanging end points in this single-arm bridge type framework, these other two ends of single-arm bridge type framework are the direct current end points, this direct current capacitor 411 is connected to this two direct currents end points as energy buffer, and sets up a direct current voltage and supply with this electric energy transducer 41 normal runnings.Because this passive power filter 40 comprises an AC capacitor, and AC capacitor can effectively intercept direct voltage, so this electric energy transducer 41 only need use the electronic power switch group 410 of single-arm bridge type framework when being applied to the single phase poaer supply system; Power supply 1 comprises two power feeders in the single phase poaer supply system, arbitrary power feeder in these two power feeders is behind this single phase passive electric-power filter 40, be connected to the interchange contact of the single-arm bridge type framework electronic power switch group 410 of this electric energy transducer 41, another power feeder of this power supply 1 then is directly connected to the negative terminal of direct current capacitor 411 of this electric energy transducer 41 and a direct current end points of this electronic power switch group 410, by this single-phase offset current of switching may command of this single-arm bridge type framework electronic power switch group 410, this offset current the monophase current that can make this power supply 1 be provided behind the Monophase electric power feeder line is provided is tending towards sinusoidal wave.
Please refer to shown in Figure 6, its electric energy transducer that discloses combined power filter of the present invention is applied to second preferred embodiment of single phase poaer supply system, since the AC capacitor of this passive power filter 40 can intercept on the occasion of direct voltage, also can intercept the direct voltage of negative value, the difference of second preferred embodiment of this single phase system and first preferred embodiment of this single phase system only is to change the power feeder wherein of power supply 1 in the single phase poaer supply system into the anode of the direct current capacitor 411 of directly receiving this electric energy transducer 41 and another direct current end points of this electronic power switch group 410 by the negative terminal of the direct current capacitor 411 of directly receiving this electric energy transducer 41, and first preferred embodiment of its operating principle and single phase system is identical.Therefore the electric energy transducer that is used for combined power filter provided by the present invention can be saved an arm (two s') electronic power switch by traditional electric energy transducer that is applied to combined power filter when being applied to the single phase poaer supply system.
Please refer to shown in Figure 7, its electric energy transducer that discloses combined power filter of the present invention is applied to first preferred embodiment of three-phase and four-line formula power-supply system, this power supply 1 supply one three-phase and four-line formula electric power supply load 3, this three-phase and four-line formula power-supply system comprises three R, S, T three-phase power feeder line and a neutral power feeder N, this combined power filter 5 is in parallel with this load 3, the harmonic current that is produced in order to this load 3 of filtering.
Refer again to shown in Figure 7, be applied to the combined power filter 5 of three-phase and four-line formula power-supply system, this combined power filter 5 is connected in series by a passive power filter 50 and an electric energy transducer 51 and forms, this passive power filter 50 is made up of one or more groups three-phase single tuning formula filter, this single tuned filter is composed in series by inductor and AC capacitor, it can select to be tuned at the main harmonic frequency of load, and this passive filter 50 is in order to reduce the power capacity of this electric energy transducer 51.This electric energy transducer 51 comprises an electronic power switch group 510 and a direct current capacitor 511, this electric energy transducer 51 is in order to promoting the filter effect of this passive power filter 50, and protects this passive power filter 50 to avoid the destruction that resonance and contiguous harmonic current inject; This electronic power switch group 510 is made up of the bridge-type framework of one or three arms, each arm comprises two electronic power switches in this three arms bridge-type framework, each electronic power switch is made up of a power crystal and a diode, this three arms bridge-type framework electronic power switch group 510 comprises two direct current end points and three interchange end points, two electronic power switch junctions are for exchanging end points in each arm bridge-type framework, these other two ends of bridge-type framework are the direct current end points, this direct current capacitor 511 is connected to the direct current end points as energy buffer, and sets up a direct current voltage and supply with this electric energy transducer 51 normal runnings.Because this passive power filter 50 all comprises an AC capacitor mutually at each, and AC capacitor can effectively intercept direct voltage, so when this electric energy transducer 51 is applied to three-phase and four-line formula power-supply system, only need use the electronic power switch group 510 of three arm bridge-type frameworks; Power supply 1 comprises four power feeders and comprises three R in the three-phase and four-line formula power-supply system, S, T three-phase power feeder line and a neutral power feeder N, these three R, S, T three-phase power feeder line is respectively behind three-phase passive power filter 50, be connected respectively to this three interchanges end points of three arm bridge-type framework electronic power switch groups 510 again, the neutral power feeder N of power supply 1 then is directly connected to the negative terminal of direct current capacitor 511 of this electric energy transducer 51 and a direct current end points of this electronic power switch group 510, offset current by this three-phase of switching may command of three arm bridge-type framework electronic power switch groups 510, because three-phase current and be neutral current in the three-phase four wire system, therefore if this three-phase current that is connected to the electronic power switch group 510 of three arm bridge-type frameworks can be controlled the correct offset current amount that obtains, then the neutral line N electric current of this combined power filter also can obtain correct electric current, and this three-phase offset current the three-phase current that can make this power supply 1 be provided after the three-phase four-wire power system is provided all is tending towards sinusoidal wave.
Please refer to shown in Figure 8, its electric energy transducer that discloses combined power filter of the present invention is applied to one second preferred embodiment of three-phase and four-line formula power-supply system, since the AC capacitor of this passive power filter 50 can intercept on the occasion of direct voltage, also can intercept the direct voltage of negative value, say the difference of second preferred embodiment and first preferred embodiment of three-phase four wire system, only be that the negative terminal that neutral power feeder with power supply 1 in the three-phase and four-line formula power-supply system is directly connected to the direct current capacitor 511 of this electric energy transducer 51 changes the anode of the direct current capacitor 511 that is directly connected to this electric energy transducer 51 and another direct current end points of this electronic power switch group 510 into, first preferred embodiment of its operating principle and three-phase four wire system is identical.Therefore the electric energy transducer that is used for combined power filter provided by the present invention can be saved an arm (two s') electronic power switch by traditional electric energy transducer that is applied to combined power filter when being applied to three-phase and four-line formula power-supply system.
Claims (4)
1, a kind of combined power filter, itself and a phase three-wire three formula power-supply system are connected in parallel, and this combined power filter is composed in series by a passive power filter and an electric energy transducer; It is characterized in that this electric energy transducer comprises:
An electronic power switch group, it is the bridge-type framework of two arms, and each arm is formed by connecting by two electronic power switch element connected in series, these two electronic power switch element connected in series junctions are one and exchange end points, the electronic power switch group of this bridge-type framework has two direct current end points, these two direct current end points are connected with the anode and the negative terminal of a unique direct current capacitor in this electric energy transducer respectively, make this electronic power switch group in parallel with this direct current capacitor, this direct current capacitor is as an energy buffer, and in order to a stable DC voltage to be provided, so that supply the direct voltage of this bridge-type framework electronic power switch group;
A power feeder road of this phase three-wire three formula power-supply system is connected to a direct current end points in these two direct current end points of the negative terminal of this direct current capacitor and this electronic power switch group behind this passive power filter, or is connected to another direct current end points in these two direct current end points of the anode of this direct current capacitor and this electronic power switch group; And other two power feeders of this phase three-wire three power-supply system are connected to two these interchange end points of this electronic power switch group respectively again behind this passive power filter, and the bridge-type framework that this electronic power switch group is two arms has two these interchange end points; Switch this direct voltage that this direct current capacitor provides by this electronic power switch group, inject this three power feeders,, make source current be tending towards sinusoidal wave to offset the load harmonic current so that this combined power filter produces a three-phase offset current.
2, a kind of combined power filter, itself and a power-supply system are connected in parallel, and this combined power filter is composed in series by a passive power filter and an electric energy transducer; It is characterized in that this electric energy transducer comprises:
An electronic power switch group, it is the bridge-type framework of an arm or three arms, and each arm is formed by connecting by two electronic power switch element connected in series, these two electronic power switch element connected in series junctions are one and exchange end points, the electronic power switch group of this bridge-type framework has two direct current end points, these two direct current end points are connected with the anode and the negative terminal of a unique direct current capacitor in this electric energy transducer respectively, make this electronic power switch group in parallel with this direct current capacitor, this direct current capacitor is as an energy buffer, and in order to a stable DC voltage to be provided, so that supply the direct voltage of this bridge-type framework electronic power switch group;
A neutral power feeder of this power-supply system is directly connected to a direct current end points in these two direct current end points of the negative terminal of this direct current capacitor and this electronic power switch group, or is directly connected to another direct current end points in these two direct current end points of the anode of this direct current capacitor and this electronic power switch group; And other power feeders of this power-supply system are connected to this interchange end points behind this passive power filter; Switch this direct voltage that this direct current capacitor provides by this electronic power switch group, so that this combined power filter produces a single-phase offset current or the three-phase offset current injects this other power feeders, to offset the load harmonic current, make source current be tending towards sinusoidal wave.
3, combined power filter as claimed in claim 2 is characterized in that, when this combined power filter was applied to a single phase poaer supply system, this electric energy transducer used the single-arm bridge type framework.
4, combined power filter as claimed in claim 2 is characterized in that, when this combined power filter was applied to a three-phase and four-line formula power-supply system, this electric energy transducer used three arm bridge-type frameworks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100309806A CN100525028C (en) | 2004-04-01 | 2004-04-01 | Electric converter of hybrid electric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100309806A CN100525028C (en) | 2004-04-01 | 2004-04-01 | Electric converter of hybrid electric filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1677811A CN1677811A (en) | 2005-10-05 |
| CN100525028C true CN100525028C (en) | 2009-08-05 |
Family
ID=35050174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100309806A Expired - Fee Related CN100525028C (en) | 2004-04-01 | 2004-04-01 | Electric converter of hybrid electric filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100525028C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355177C (en) * | 2005-12-18 | 2007-12-12 | 江苏省电力公司无锡供电公司 | Mixed THF based on symmetrical component method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5321598A (en) * | 1992-09-18 | 1994-06-14 | Westinghouse Electric Corp. | Three-phase active filter utilizing rotating axis transformation |
| JP2000232788A (en) * | 1999-02-09 | 2000-08-22 | Densei Lambda Kk | Reduction of higher harmonic noise of power converter circuit |
| CN1449083A (en) * | 2002-03-11 | 2003-10-15 | 盈正豫顺电子股份有限公司 | Active harmonic wave suppressing device and control method |
| CN2645316Y (en) * | 2003-09-12 | 2004-09-29 | 四川大学 | Digital active electric power filter |
-
2004
- 2004-04-01 CN CNB2004100309806A patent/CN100525028C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5321598A (en) * | 1992-09-18 | 1994-06-14 | Westinghouse Electric Corp. | Three-phase active filter utilizing rotating axis transformation |
| JP2000232788A (en) * | 1999-02-09 | 2000-08-22 | Densei Lambda Kk | Reduction of higher harmonic noise of power converter circuit |
| CN1449083A (en) * | 2002-03-11 | 2003-10-15 | 盈正豫顺电子股份有限公司 | Active harmonic wave suppressing device and control method |
| CN2645316Y (en) * | 2003-09-12 | 2004-09-29 | 四川大学 | Digital active electric power filter |
Non-Patent Citations (4)
| Title |
|---|
| 有源电力滤波器的研究. 毛恒春，侯振程，李再华.中国电机工程学报，第11卷第3期. 1991 |
| 有源电力滤波器的研究. 毛恒春，侯振程，李再华.中国电机工程学报，第11卷第3期. 1991 * |
| 用于三相四线制系统的有源电力滤波器研究. 卓放等.西安交通大学学报，第34卷第3期. 2000 |
| 用于三相四线制系统的有源电力滤波器研究. 卓放等.西安交通大学学报，第34卷第3期. 2000 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1677811A (en) | 2005-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7272026B2 (en) | Power converter for a hybrid power filter | |
| CN101517854B (en) | Voltage source converter station | |
| TWI466429B (en) | Inverter and active power filter system | |
| CN109861548A (en) | A kind of combined power modular type commutator transformer | |
| CN102769291B (en) | Active power filter based on multiphase converter structure | |
| CN103201926B (en) | For the supply unit of load that is nonlinear, that change in time | |
| CN1832323A (en) | Five-level converter structure device | |
| CN100384045C (en) | Virtual work compensating device | |
| CN108390572A (en) | Active third-harmonic zero-sequence voltage matrix converter input current waveform optimizes topological structure | |
| CN102801381A (en) | Controllable transformer device capable of controlling amplitude and phase angle of voltage individually and control method for same | |
| CN102638047A (en) | Three-phase unified power quality control device with bypass switches | |
| CN103762879A (en) | Dual-output single-phase three-switch-group MMC inverter without direct current bias and control method thereof | |
| CN203645329U (en) | Improved LCL filter and inverter system | |
| CN200944530Y (en) | Power filter | |
| CN100525028C (en) | Electric converter of hybrid electric filter | |
| CN101577428B (en) | Single-phase module combined active power filter for tractive power supply | |
| CN203872078U (en) | N-output single-phase N+1 switch group MMC inverter | |
| CN201758286U (en) | Hybrid power filter reactive compensation device | |
| CN203872080U (en) | Dual-output single-phase three-switch-group MMC inverter without direct current bias | |
| CN203872081U (en) | Dual-output single-phase six-switch-group MMC inverter | |
| CN209120079U (en) | The hybrid Modular multilevel converter of one type, three level | |
| CN202616985U (en) | Filter circuit structure | |
| CN100399666C (en) | Three-phase three-wire type active electric filter | |
| CN212784780U (en) | Active power filter based on two-level branch circuit parallel connection | |
| CN205248817U (en) | Reactive compensation main circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 |