CN204720984U - Three-phase and four-line and phase three-wire three active power filtering system - Google Patents
Three-phase and four-line and phase three-wire three active power filtering system Download PDFInfo
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- CN204720984U CN204720984U CN201520365802.2U CN201520365802U CN204720984U CN 204720984 U CN204720984 U CN 204720984U CN 201520365802 U CN201520365802 U CN 201520365802U CN 204720984 U CN204720984 U CN 204720984U
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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 utility model discloses a kind of three-phase and four-line and phase three-wire three active power filtering system, comprise connect successively circuit breaker (1), fuse (2), divider resistance (3), radio-frequency rector (4), Hall element (5), IGBT inverter (6), direct current capacitor (7) and the current transformer (12) connected successively, input and modulate circuit (11), main controller (9), IGBT drive circuit (10); Wherein, described Hall element (5) is connected with main controller (9) by inverter current testing circuit (8); Native system adopts double circle structure, and compensation precision is high, in three-phase four-wire system, IGBT inverter adopts independent compensation mode, can realize single-phase harmonic current and reactive power compensation; Have filter range wide, fast response time, filter capacity is strong, simple to operate, the advantages such as fail safe is good.
Description
Technical field
The utility model relates to a kind of three-phase and four-line and phase three-wire three active power filtering system, belongs to grid power technical field of filtering.
Background technology
Along with the development of power electronic technology, a large amount of power consumption equipment that be made up of electronic power switch, that have nonlinear characteristic is widely used in the industrial circles such as metallurgy, iron and steel, traffic, chemical industry, communication, rubber: as electrolysis unit, electric locomotive, rolling mill, coreless induction furnace, ups power, frequency conversion equipment etc., the pollution of the harmonic wave caused by these equipment to electrical network is on the rise; The nearest report of American Electric Power research institute EPRI is pointed out, the whole America reaches hundreds of hundred million dollars because of quality of power supply losses such as harmonic waves.
Therefore, this just needs electrical network to arrange filter apparatus, to carry out harmonics restraint and reactive power compensation to electrical network, thus ensures the stability of characteristics of mains supply.
Traditional electrical network filter apparatus is passive filter, and it exists many deficiencies: 1, passive filtering equipment volume is large; 2, filter effect and running situation closely related; 3, under particular case, passive filter can with system generation resonance, amplify harmonic wave; 4, passive filter can only compensate specific subharmonic.
Therefore, need to propose the more perfect active power filter system device of novel function make up the deficiency of passive filter or replace passive filtration unit.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of three-phase and four-line and phase three-wire three active power filtering system, and its filter range is wide, fast response time, filter capacity is strong, simple to operate, fail safe is good, can make up the deficiency of traditional passive filter.
To achieve these goals, the technical solution adopted in the utility model is: a kind of three-phase and four-line and phase three-wire three active power filtering system, native system comprise connect successively circuit breaker, fuse, divider resistance, radio-frequency rector, Hall element, IGBT inverter, direct current capacitor and the current transformer connected successively, input and modulate circuit, main controller, IGBT drive circuit; Wherein, described Hall element is connected with main controller by inverter current testing circuit.
Native system adopts double-loop control strategy: current transformer sampling three-phase electric current, through input and modulate circuit laggard enter main controller, main controller controls IGBT drive circuit according to sampled signal, by driving IGBT inverter, produce offset current, flow into electrical network through reactor, form a road closed-loop system;
Simultaneity factor is by Hall element sampled I GBT inverter output current, main controller is sent into after the conditioning of inverter current testing circuit, according to sampled I GBT inverter output current and sampling power network current, by controlling IGBT drive circuit control IGBT inverter, export and expect electric current, form another road closed-loop system.
In three-phase four wire system, IGBT inverter adopts independent compensation mode, and comprise A phase, B phase, C phase current transformer, three is respectively by three center line connecting systems.
Native system enters power network compensation mode and includes but not limited to overall compensating form, local equalize's form and partial-compensation form three kinds of forms.
The voltage range of native system is 110V ~ 1500V; Harmonic current administered by unit is that 50A ~ 800A also can parallel connection 10.
Compared with traditional passive filter: the utility model adopts double circle structure, compensation precision is high, in three-phase four-wire system, IGBT inverter adopts independent compensation mode, can realize single-phase harmonic current and reactive power compensation; Have filter range wide, fast response time, filter capacity is strong, simple to operate, the advantages such as fail safe is good.
Accompanying drawing explanation
Fig. 1 is the utility model electrical schematics;
Fig. 2 is the utility model IGBT inverter electric diagram.
In figure: 1, circuit breaker, 2, fuse, 3, divider resistance, 4, radio-frequency rector, 5, Hall element, 6, IGBT inverter, 7, direct current capacitor, 8, inverter current testing circuit, 9, main controller, 10, IGBT drive circuit, 11, input and modulate circuit, 12, current transformer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of three-phase and four-line and phase three-wire three active power filtering system, native system comprise connect successively circuit breaker 1, fuse 2, divider resistance 3, radio-frequency rector 4, Hall element 5, IGBT inverter 6, direct current capacitor 7 and current transformer 12, input and the modulate circuit 11 connected successively, main controller 9, IGBT drive circuit 10; Wherein, described Hall element 5 is connected with main controller 9 by inverter current testing circuit 8.
Native system adopts double-loop control strategy: current transformer 12 sampling three-phase electric current, through input and modulate circuit 11 laggard enter main controller 9, main controller 9 controls IGBT drive circuit 10 according to sampled signal, by driving IGBT inverter 6, produce offset current, flow into electrical network through reactor 4, form a road closed-loop system;
Simultaneity factor is by Hall element 5 sampled I GBT inverter 6 output current, main controller 9 is sent into after inverter current testing circuit 8 is nursed one's health, according to sampled I GBT inverter 6 output current and sampling power network current, by controlling IGBT drive circuit 10 control IGBT inverter 6, export and expect electric current, form another road closed-loop system.
Wherein, in described three-phase four wire system, IGBT inverter 6 adopts independent compensation mode, as shown in Figure 2: comprise A phase, B phase, C phase current transformer, three is respectively by three center line connecting systems, in harmonic compensation process, single-phase converter can be controlled according to sample rate current and carry out single-phase compensation, effectively can administer the problems such as single-phase imbalance, realize the single-phase independent compensation of three phase harmonic electric current and reactive power.
Native system be applicable to the wider voltage range of 110V ~ 1500V; Unit is administered harmonic current and is 50A ~ 800A and can be in parallel 10, and in addition, native system access power network compensation mode concrete form has overall compensating form, local equalize's form (to individual equipment) and partial-compensation form but is not limited to above three kinds of forms.
As Fig. 1: after system electrification, circuit breaker 1 closes a floodgate, and first active power filtering system is charged by the direct current capacitor 7 of divider resistance 3 pairs of DC buses, and this process is the moment impact to DC bus capacitor after preventing from powering on.
After busbar voltage reaches rated value, pre-charge contactor closes; Direct current capacitor 7, as energy-storage travelling wave tube, outwards exports offset current by IGBT inverter 6 and inner reactor and provides energy.Nonlinear load works, to be sampled power network current by current transformer 12, after input and modulate circuit 11 process, send into main controller 9, main controller drives IGBT inverter 6, IGBT inverter 6 output current to inject electrical network through reactor 4 by controlling IGBT drive circuit 10;
Simultaneously, sampled by Hall element 5 pairs of IGBT inverter output current, main controller 9 is sent into after inverter current testing circuit 8 is nursed one's health, main controller 9 is by analyzing Hall element 5 sample rate current, adjustment IGBT inverter 6 control strategy, thus drive IGBT inverter 6 to export the harmonic compensation current after adjustment by controlling IGBT drive circuit 10.
In sum: the utility model adopts double circle structure, and compensation precision is high, in three-phase four-wire system, IGBT inverter 6 adopts independent compensation mode, can realize single-phase harmonic current and reactive power compensation; Have filter range wide, fast response time, filter capacity is strong, simple to operate, the advantages such as fail safe is good.
Claims (5)
1. a three-phase and four-line and phase three-wire three active power filtering system, it is characterized in that, native system comprise connect successively circuit breaker (1), fuse (2), divider resistance (3), radio-frequency rector (4), Hall element (5), IGBT inverter (6), direct current capacitor (7) and the current transformer (12) connected successively, input and modulate circuit (11), main controller (9), IGBT drive circuit (10); Wherein, described Hall element (5) is connected with main controller (9) by inverter current testing circuit (8).
2. a kind of three-phase and four-line according to claim 1 and phase three-wire three active power filtering system, it is characterized in that, native system adopts double-loop control strategy: current transformer (12) sampling three-phase electric current, through input and modulate circuit (11) laggard enter main controller (9), main controller (9) controls IGBT drive circuit (10) according to sampled signal, by driving IGBT inverter (6), produce offset current, flow into electrical network through reactor (4), form a road closed-loop system;
Simultaneity factor is by Hall element (5) sampled I GBT inverter (6) output current, main controller (9) is sent into after inverter current testing circuit (8) conditioning, according to sampled I GBT inverter (6) output current and sampling power network current, by controlling IGBT drive circuit (10) control IGBT inverter (6), export and expect electric current, form another road closed-loop system.
3. a kind of three-phase and four-line according to claim 1 and 2 and phase three-wire three active power filtering system, it is characterized in that, in native system, IGBT inverter (6) adopts independent compensation mode, and comprise A phase, B phase, C phase current transformer, three is respectively by three center line connecting systems.
4. a kind of three-phase and four-line according to claim 1 and 2 and phase three-wire three active power filtering system, is characterized in that, native system enters power network compensation mode and includes but not limited to overall compensating form, local equalize's form and partial-compensation form three kinds of forms.
5. a kind of three-phase and four-line according to claim 1 and 2 and phase three-wire three active power filtering system, is characterized in that, the voltage range of native system is 110V ~ 1500V; Harmonic current administered by unit is that 50A ~ 800A also can parallel connection 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520365802.2U CN204720984U (en) | 2015-06-01 | 2015-06-01 | Three-phase and four-line and phase three-wire three active power filtering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520365802.2U CN204720984U (en) | 2015-06-01 | 2015-06-01 | Three-phase and four-line and phase three-wire three active power filtering system |
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| CN204720984U true CN204720984U (en) | 2015-10-21 |
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| CN201520365802.2U Expired - Fee Related CN204720984U (en) | 2015-06-01 | 2015-06-01 | Three-phase and four-line and phase three-wire three active power filtering system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147138A (en) * | 2017-05-26 | 2017-09-08 | 云南电网有限责任公司电力科学研究院 | Three-phase and four-line power distribution network compensation equipment DC capacitor detection method, apparatus and system |
| CN112305361A (en) * | 2020-11-06 | 2021-02-02 | 江苏省电力试验研究院有限公司 | Temperature rise test three-phase unbalanced current compensation system and control method |
-
2015
- 2015-06-01 CN CN201520365802.2U patent/CN204720984U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147138A (en) * | 2017-05-26 | 2017-09-08 | 云南电网有限责任公司电力科学研究院 | Three-phase and four-line power distribution network compensation equipment DC capacitor detection method, apparatus and system |
| CN107147138B (en) * | 2017-05-26 | 2019-11-12 | 云南电网有限责任公司电力科学研究院 | Three-phase and four-line power distribution network compensates equipment DC capacitor detection method, apparatus and system |
| CN112305361A (en) * | 2020-11-06 | 2021-02-02 | 江苏省电力试验研究院有限公司 | Temperature rise test three-phase unbalanced current compensation system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20151021 Termination date: 20160601 |