CN204928142U - Outdoor type takes active power filter of unbalanced three phase inhibit feature - Google Patents
Outdoor type takes active power filter of unbalanced three phase inhibit feature Download PDFInfo
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- CN204928142U CN204928142U CN201520544373.5U CN201520544373U CN204928142U CN 204928142 U CN204928142 U CN 204928142U CN 201520544373 U CN201520544373 U CN 201520544373U CN 204928142 U CN204928142 U CN 204928142U
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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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- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Power Conversion In General (AREA)
Abstract
The utility model relates to an outdoor type takes active power filter of unbalanced three phase inhibit feature connects between electric wire netting and load, including current transformer, two voltage transformer, harmonic extraction ware, voltage comparater, central processing unit, PWM ripples generator and three -phase four -leg dc -to -ac converters, current transformer is connected load and harmonic extraction ware respectively, and a voltage transformer connected load, another voltage transformer connection electric wire netting, two voltage transformer all connect voltage comparater, harmonic extraction ware and voltage comparater equally divide and do not connect central processing unit, central processing unit connects PWM ripples generator, the three -phase four -leg dc -to -ac converter is connected to PWM ripples generator. Compared with the prior art, the utility model has the advantages of simple to operate, cost are very low, the configuration is nimble changeable, overhaul the maintenance convenience, the operation is directly perceived.
Description
Technical field
The utility model relates to a kind of active power filter, especially relates to a kind of active power filter of outdoor type band three-phase imbalance inhibit feature.
Background technology
In low and medium voltage distribution network; three-phase load change at random; three-phase load unbalance can cause additional heating and the vibration of electric rotating machine; jeopardize its safe operation and normal output; causing with negative sequence component is that misoperation occurs for the multiple protection of starting element, and this has serious threat to electric power netting safe running.The harmonic wave that nonlinear-load causes brings serious negative effect equally, particularly along with the fast development of power electronic technology, the application that various power electronic equipment is increasingly extensive in generating, transmission of electricity, distribution and using electricity system, harmonic wave, idle pollution that it brings electrical network are also serious gradually.Simultaneously along with the progress of social informatization, the extensive use of sensitiveness load (as computer control system, sophisticated electronics etc.), it is also proposed higher requirement to the quality of power supply.
Utility model content
The purpose of this utility model is exactly provide a kind of active power filter of outdoor type band three-phase imbalance inhibit feature to overcome defect that above-mentioned prior art exists, have easy for installation, cost is very low, flexible configuration is changeable, repair and maintenance is convenient, operate the advantages such as directly perceived.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of active power filter of outdoor type band three-phase imbalance inhibit feature, be connected between electrical network and load, comprise current transformer, two voltage transformers, harmonic wave extractor, voltage comparator, central processing unit, PWM baud generator and three-phase four-leg inverter, described current transformer connects load and harmonic wave extractor respectively, a voltage transformer connects load, another voltage transformer connects electrical network, two voltage transformers all connect voltage comparator, described harmonic wave extractor is connected central processing unit respectively with voltage comparator, described central processing unit connects PWM baud generator, described PWM baud generator connects three-phase four-leg inverter.
Described three-phase four-leg inverter comprises A phase brachium pontis in parallel, B phase brachium pontis, C phase brachium pontis and center line brachium pontis, and described A phase brachium pontis, B phase brachium pontis, C phase brachium pontis and center line brachium pontis correspondence connects three-phase and center line transmission line between electrical network and load.
Described central processing unit is ARM+DSP dual core processor.
Described central processing unit is connected with the wireless launcher with host computer wireless connections.
Described current transformer connects harmonic wave extractor by data collecting card, and described voltage transformer connects voltage comparator by data collecting card.
Also comprise the LCDs and control button that connect central processing unit.
Also comprise housing, this active power filter is installed in housing by screw, is provided with Air cooler and louvre in described housing.
Described housing internal layer is provided with sound panel.
Compared with prior art, the utility model has the following advantages:
1) in elimination system, the three-phase current unbalance suppressing three-phase load inequality to be brought while harmonic wave, can also be compensated, the system side quality of power supply can be improved thus, reduce the potential safety hazard of system cloud gray model, improve system reliability.
2) adopt housing console mode integral structure, being applied to open air, is outdoor type equipment, increases sound panel and abates the noise, have easy for installation, cost is very low, repair and maintenance convenient, the advantage of environmental protection.
3) adopt wireless launcher to realize remote monitoring, configure LCDs and control button simultaneously, operation is directly perceived, and ARM+DSP dual core processor ensures that data processing is precisely quick.
Accompanying drawing explanation
Fig. 1 is the utility model general structure schematic diagram.
In figure: 1, current transformer, 2, voltage transformer, 3, harmonic wave extractor, 4, voltage comparator, 5, central processing unit, 6, PWM baud generator, 7, three-phase four-leg inverter, 8, electrical network, 9, load.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.The present embodiment is implemented premised on technical solutions of the utility model, give detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, a kind of active power filter of outdoor type band three-phase imbalance inhibit feature, be connected between electrical network 8 and load 9, this load 9 is nonlinear load, comprise current transformer 1, two voltage transformers 2, harmonic wave extractor 3, voltage comparator 4, central processing unit 5, PWM baud generator 6 and three-phase four-leg inverter 7, current transformer 1 connects load 9 and harmonic wave extractor 3 respectively, a voltage transformer 2 connects load 9, another voltage transformer 2 connects electrical network 8, two voltage transformers 2 all connect voltage comparator 4, harmonic wave extractor 3 is connected central processing unit 5 respectively with voltage comparator 4, central processing unit 5 connects PWM baud generator 6, PWM baud generator 6 connects three-phase four-leg inverter 7.
Wherein, three-phase four-leg inverter 7 comprises A phase brachium pontis in parallel, B phase brachium pontis, C phase brachium pontis and center line brachium pontis, A phase brachium pontis, B phase brachium pontis, C phase brachium pontis and center line brachium pontis correspondence connects three-phase and center line transmission line between electrical network 8 and load 9, four brachium pontis are formed by the IGBT (InsulatedGateBipolarTransistor, insulated gate bipolar transistor) of two anti-paralleled diodes.
Central processing unit 5 is ARM+DSP dual core processor, and this ARM+DSP dual core processor treatment effeciency is high, can long-time stable work.Central processing unit 5 is connected with the wireless launcher with host computer wireless connections, and minimizing is connected up and real-time is good.
Current transformer 1 connects harmonic wave extractor 3 by data collecting card, and voltage transformer 2 connects voltage comparator 4 by data collecting card, and data collecting card realizes analog-to-digital conversion function.
Central processing unit 5 is connected with LCDs and control button, and LCDs is convenient to display working condition intuitively, and control button comprises unlatching, cuts out and the input etc. of set point.
This active power filter is installed in housing by screw, is provided with Air cooler and louvre in housing, and thermal diffusivity is good.Housing internal layer is provided with sound panel, makes noise≤55dB.
This device can compensate the harmonic wave that load 9 side nonlinear-load produces, and improving the system side quality of power supply, is the generation that owner avoids electric power to impose a fine.Load current is detected by current transformer 1, harmonic wave extractor 3 extracts the harmonic components in load current, central processing unit 5 sends harmonic compensation instruction to PWM baud generator 6 according to harmonic components, make three-phase four-leg inverter 7 produce the contrary electric current in and harmonic components equal and opposite in direction, direction and inject electrical network 8, reach the object of filtering.
The active power filter of outdoor type band three-phase imbalance inhibit feature described in the utility model, three-phase imbalance suppression can also be carried out while harmonic wave in elimination system, when carrying out three-phase imbalance and compensating, compensation arrangement is equivalent to a controllable voltage source.Voltage transformer 2 detection of grid and load three-phase voltage, both corresponding voltage differences are sent to central processing unit 5 by voltage comparator 4, central processing unit 5 controls the break-make of the IGBT on inner each phase brachium pontis by PWM baud generator 6, produce the controllable voltage higher or lower than load system voltage, the amplitude of this voltage and phase place can control, thus and produce voltage difference between system, make system and the flowing of compensation arrangement produce power, these energy flow in three-phase and center line, compensate the three-phase current unbalance suppressing three-phase load inequality to be brought, improve the system side quality of power supply thus, reduce the potential safety hazard of system cloud gray model, improve system reliability.
Claims (8)
1. the active power filter of an outdoor type band three-phase imbalance inhibit feature, be connected between electrical network (8) and load (9), it is characterized in that, comprise current transformer (1), two voltage transformers (2), harmonic wave extractor (3), voltage comparator (4), central processing unit (5), PWM baud generator (6) and three-phase four-leg inverter (7), described current transformer (1) connects load (9) and harmonic wave extractor (3) respectively, a voltage transformer (2) connects load (9), another voltage transformer (2) connects electrical network (8), two voltage transformers (2) all connect voltage comparator (4), described harmonic wave extractor (3) is connected central processing unit (5) respectively with voltage comparator (4), described central processing unit (5) connects PWM baud generator (6), described PWM baud generator (6) connects three-phase four-leg inverter (7).
2. the active power filter of a kind of outdoor type band three-phase imbalance inhibit feature according to claim 1, it is characterized in that, described three-phase four-leg inverter (7) comprises A phase brachium pontis in parallel, B phase brachium pontis, C phase brachium pontis and center line brachium pontis, and described A phase brachium pontis, B phase brachium pontis, C phase brachium pontis and center line brachium pontis correspondence connects three-phase and center line transmission line between electrical network (8) and load (9).
3. the active power filter of a kind of outdoor type band three-phase imbalance inhibit feature according to claim 1, it is characterized in that, described central processing unit (5) is ARM+DSP dual core processor.
4. the active power filter of a kind of outdoor type band three-phase imbalance inhibit feature according to claim 1, it is characterized in that, described central processing unit (5) is connected with the wireless launcher with host computer wireless connections.
5. the active power filter of a kind of outdoor type band three-phase imbalance inhibit feature according to claim 1, it is characterized in that, described current transformer (1) connects harmonic wave extractor (3) by data collecting card, and described voltage transformer (2) connects voltage comparator (4) by data collecting card.
6. the active power filter of a kind of outdoor type band three-phase imbalance inhibit feature according to claim 1, is characterized in that, also comprises the LCDs and control button that connect central processing unit (5).
7. the active power filter of a kind of outdoor type band three-phase imbalance inhibit feature according to claim 1, it is characterized in that, also comprise housing, this active power filter is installed in housing by screw, is provided with Air cooler and louvre in described housing.
8. the active power filter of a kind of outdoor type band three-phase imbalance inhibit feature according to claim 7, it is characterized in that, described housing internal layer is provided with sound panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520544373.5U CN204928142U (en) | 2015-07-24 | 2015-07-24 | Outdoor type takes active power filter of unbalanced three phase inhibit feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520544373.5U CN204928142U (en) | 2015-07-24 | 2015-07-24 | Outdoor type takes active power filter of unbalanced three phase inhibit feature |
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| Publication Number | Publication Date |
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| CN204928142U true CN204928142U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520544373.5U Active CN204928142U (en) | 2015-07-24 | 2015-07-24 | Outdoor type takes active power filter of unbalanced three phase inhibit feature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879677A (en) * | 2018-06-08 | 2018-11-23 | 浙江涌原新能科技股份有限公司 | A kind of Intelligent purifying electric net device |
-
2015
- 2015-07-24 CN CN201520544373.5U patent/CN204928142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879677A (en) * | 2018-06-08 | 2018-11-23 | 浙江涌原新能科技股份有限公司 | A kind of Intelligent purifying electric net device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |