CN203983990U - Combined parallel filtering compensation arrangement in low voltage complete set - Google Patents
Combined parallel filtering compensation arrangement in low voltage complete set Download PDFInfo
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- CN203983990U CN203983990U CN201420020716.3U CN201420020716U CN203983990U CN 203983990 U CN203983990 U CN 203983990U CN 201420020716 U CN201420020716 U CN 201420020716U CN 203983990 U CN203983990 U CN 203983990U
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- filtering compensation
- active power
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- filtering
- passive
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The shortcoming existing in order to overcome existing passive filtering compensation and active power filtering compensation way, the utility model provides the combined parallel filtering compensation arrangement in a kind of low voltage complete set, this device is mainly made up of circuit breaker, intelligent filter compensating controller, 2 passive filtering compensation circuits, 1 active power filtering compensation circuit, after 2 passive filtering compensation circuits and the parallel connection of an active power filtering compensation circuit, be connected on circuit breaker lower end, circuit breaker upper end and load are connected in parallel.This device is by the switching of intelligent filter compensating controller control passive filtering compensation circuit and active power filtering compensation circuit, utilize 2 passive filtering compensation circuits to carry out 5,7 low-order harmonics of filtering, high order harmonic component is carried out filtering by active power filtering compensation circuit, thereby reaches the object of entire spectrum filtering harmonic current with lower cost.
Description
Technical field:
The utility model relates to the combined parallel filtering compensation arrangement in a kind of low voltage complete set, harmonic current, compensation network reactive power in this device energy filtering low voltage electric network, thus the interference of harmonic wave to electrical network effectively reduced, reduce line loss and improve power factor.
Background technology:
At present, the filtering compensation mode in low voltage complete set is mainly divided into passive filtering compensation and active power filtering compensates two kinds.The principle of passive filtering compensation is by reactor, capacitor composition filter circuit, and characteristic harmonics is formed to low impedance path, makes harmonic current flow into filter circuit, reduces the harmonic current that injects low voltage electric network, thereby reaches the object that purifies electrical network.Passive filtering compensation device has advantages of that cost is low, simple in structure, easy to maintenance, but its shortcoming be single filtering compensation loop can only filtering specific times harmonic wave, poor stability, and likely with electrical network generation resonance.The principle of active power filtering compensation is by DSP high-speed digital signal processor, the current sampling signal in low voltage electric network to be processed, and drive IGBT or IPM power model with pwm pulse modulation signal, generation equates with mains by harmonics size of current, the electric current of opposite direction injects electrical network, reach the object of offsetting harmonic current, thereby initiatively eliminate mains by harmonics.The advantage of active power filter compensating device is capable of dynamic filtering each harmonic, can not transship, and can not produce resonance with electrical network, but that its shortcoming is cost is higher, and separate unit installed capacity is little.
Summary of the invention:
The shortcoming existing in order to overcome existing passive filtering compensation and active power filtering compensation way, the utility model provides the combined parallel filtering compensation arrangement in a kind of low voltage complete set, this device is mainly made up of circuit breaker, intelligent filter compensating controller, 2 passive filtering compensation circuits, 1 active power filtering compensation circuit, after 2 passive filtering compensation circuits and the parallel connection of an active power filtering compensation circuit, be connected on circuit breaker lower end, circuit breaker upper end and load are connected in parallel.This device is by the switching of intelligent filter compensating controller control passive filtering compensation circuit and active power filtering compensation circuit, utilize 2 passive filtering compensation circuits to carry out 5,7 low-order harmonics of filtering, high order harmonic component is carried out filtering by active power filtering compensation circuit, thereby reaches the object of entire spectrum filtering harmonic current with lower cost.
The utility model solves the technical scheme that its technical problem adopts: in the combined parallel filtering compensation arrangement in low voltage complete set, establish 2 passive filtering compensation circuits and 1 active power filtering compensation circuit.When this device work, power factor and the electric current of intelligent filter compensating controller to low voltage bus side detects, according to the situation of power factor, drop into successively from low to high each passive filtering compensation circuit, thereby reach the object that not only compensates low voltage electric network power factor but also filtering low-order harmonic.Power factor reaches after set point, the power frequency part in the bus side current signal detecting and harmonic wave part are carried out decoupling zero by intelligent filter compensating controller, then selectively reject power frequency component and the harmonic signal identical with passive filtering compensation circuit tuned frequency, and remaining harmonic current signal is converted into the command signal of active power filtering compensation circuit.Pair low-order harmonic failure of consideration identical and following with passive filtering compensation circuit tuned frequency of intelligent filter compensating controller, only to administering higher than the characteristic frequency harmonic wave of passive filtering compensation circuit tuned frequency, intelligent filter compensating controller output signal, the electric current of controlling equal and opposite in direction of active filter generation, opposite direction compensates, thereby reaches the object of effective removal high order harmonic component.When it's the added time is past bus side power factor, intelligent filter compensating controller excises passive filtering compensation circuit from high to low successively, active power filtering compensation circuit keeping devotion always, dynamic compensation harmonic current.In the time that nonlinear load quits work, all passive and active power filtering compensation circuits of intelligent filter compensating controller excision, combined parallel filtering compensation arrangement is out of service.
The beneficial effects of the utility model are: this device is realized low voltage electric network reactive power compensation and entire spectrum filtering harmonic current with lower cost, reduce line loss, improve power factor, effectively reduce the interference of harmonic wave to electrical network.
Brief description of the drawings:
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the circuit theory diagrams that the utility model is implemented.
1. main breakers in figure, 2. current transformer, 3. combined parallel filtering compensation arrangement circuit breaker, 4. fuse, 5. vacuum contactor, 6. filter reactor, 7. filtering capacitor, 8. intelligent filter compensating controller, 9. active power filtering compensation circuit circuit breaker, 10. active filter.
Embodiment:
In the embodiment shown in fig. 1, three-phase low-voltage inlet wire connects main breaker (1) upper end, combined parallel filtering compensation arrangement and nonlinear load are attempted by main breaker (1) lower end, 2 passive filtering compensation circuits and 1 active power filtering compensation circuit are attempted by the lower end of combined parallel filtering compensation arrangement circuit breaker (3), the upper end of the lower termination vacuum contactor (5) of fuse (4), the upper end of the lower termination filter reactor (6) of vacuum contactor (5), the lower termination filtering capacitor (7) of filter reactor (6), the lower end of active power filtering compensation circuit circuit breaker (9) is connected to source filter (10), the current input terminal of intelligent filter compensating controller (8) is connected with current transformer (2), its output is controlled respectively vacuum contactor (5) and active filter (10).In the time that nonlinear load is worked, intelligent filter compensating controller (8) is compared the power factor of the bus side detecting through current transformer (2) with the set point of intelligent filter compensating controller (8), if power factor is lower than set point, output signal of intelligent filter compensating controller (8), control vacuum contactor (5) adhesive, drop into a passive filtering compensation circuit.The rest may be inferred, drops into successively from low to high each passive filtering compensation circuit, until power factor reaches intelligent filter compensating controller (8) set point.The bus side current signal that intelligent filter compensating controller (8) detects current transformer (2) again carries out decoupling zero, selectively reject power frequency component and the harmonic signal identical with passive filtering compensation circuit tuned frequency, and remaining harmonic signal is converted into the command signal of active power filtering compensation circuit.Intelligent filter compensating controller (8) is to the low-order harmonic failure of consideration identical and following with passive filtering compensation circuit tuned frequency, only to administering higher than the characteristic frequency harmonic wave of passive filtering compensation circuit tuned frequency, intelligent filter compensating controller (8) output signal, the electric current of controlling equal and opposite in direction of active filter (10) generation, opposite direction compensates, thereby reaches the object of removing high order harmonic component.When bus side is without the merits and demerits added time, control the excision successively from high to low of passive filtering compensation circuit, active filter (10) keeping devotion always, dynamic compensation harmonic current by intelligent filter compensating controller (8).When nonlinear load quits work, all passive and active power filtering compensation circuits of intelligent filter compensating controller (8) excision, combined parallel filtering compensation arrangement is out of service.
Claims (1)
1. the combined parallel filtering compensation arrangement in a low voltage complete set, mainly by circuit breaker, intelligent filter compensating controller, 2 passive filtering compensation circuits, 1 active power filtering compensation circuit composition, combined parallel filtering compensation arrangement and nonlinear load are attempted by main breaker lower end, 2 passive filtering compensation circuits and 1 active power filtering compensation circuit are attempted by the lower end of combined parallel filtering compensation arrangement circuit breaker, the upper end of termination vacuum contactor under fuse, the upper end of the lower termination filter reactor of vacuum contactor, the lower termination filtering capacitor of filter reactor, the lower end of active power filtering compensation circuit circuit breaker is connected to source filter, the current input terminal of intelligent filter compensating controller is connected with current transformer, its output is controlled respectively vacuum contactor and active filter, by the switching of intelligent filter compensating controller control passive filtering compensation circuit and active power filtering compensation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020716.3U CN203983990U (en) | 2014-01-03 | 2014-01-03 | Combined parallel filtering compensation arrangement in low voltage complete set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020716.3U CN203983990U (en) | 2014-01-03 | 2014-01-03 | Combined parallel filtering compensation arrangement in low voltage complete set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203983990U true CN203983990U (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420020716.3U Expired - Fee Related CN203983990U (en) | 2014-01-03 | 2014-01-03 | Combined parallel filtering compensation arrangement in low voltage complete set |
Country Status (1)
| Country | Link |
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| CN (1) | CN203983990U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655218A (en) * | 2017-03-26 | 2017-05-10 | 湖北波宏电气有限公司 | Hybrid filtering compensation device |
| CN106712025A (en) * | 2017-03-24 | 2017-05-24 | 佛山市帝造电器有限公司 | Active integrated filtering compensation device |
-
2014
- 2014-01-03 CN CN201420020716.3U patent/CN203983990U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712025A (en) * | 2017-03-24 | 2017-05-24 | 佛山市帝造电器有限公司 | Active integrated filtering compensation device |
| CN106655218A (en) * | 2017-03-26 | 2017-05-10 | 湖北波宏电气有限公司 | Hybrid filtering compensation device |
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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 |
Granted publication date: 20141203 Termination date: 20160103 |