CN204118737U - Intermediate frequency furnace mixed type dynamic filter compensation device - Google Patents
Intermediate frequency furnace mixed type dynamic filter compensation device Download PDFInfo
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- CN204118737U CN204118737U CN201420471181.1U CN201420471181U CN204118737U CN 204118737 U CN204118737 U CN 204118737U CN 201420471181 U CN201420471181 U CN 201420471181U CN 204118737 U CN204118737 U CN 204118737U
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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 intermediate frequency furnace mixed type dynamic filter compensation device, relate to the device technique field of reducing harmonic wave or ripple.Comprise casing, 5 LC filter circuits, 7 LC filter circuits, active filter APF and control system are provided with in described casing, electric power system is connected with intermediate frequency power supply through current transformer, described 5 LC filter circuits, 7 LC filter circuits and active filter APF are connected in parallel on the power line between current transformer and intermediate frequency power supply, and every bar LC filter circuit comprises the circuit breaker, contactor, filter reactor and the filtering capacitor that are sequentially connected in series.The mode that this device adopts LC filter circuit to combine with active filter APF, filter capacity significantly improves, do not need to drop into capacitor in a large number, benefit can not be caused to network system, and relatively high capacity active filter has equipment cost is low, cost performance is high feature.
Description
Technical field
The utility model relates to the device technique field of reducing harmonic wave or ripple, particularly relates to a kind of intermediate frequency furnace mixed type dynamic filter compensation device.
Background technology
The intermediate frequency furnace that more domestic capacity are less at present, the general 12 pulsation intermediate frequency power supplies that adopt are powered, and it is a rectification-reversals that power supply produces electric current of intermediate frequency, and its front end is silicon con trolled rectifier circuit.Rectification circuit is typical harmonic source, produces the harmonic current flowing into electrical network.Because intermediate frequency furnace electrical characteristics are severe, current mode of carrying out harmonic wave control to intermediate frequency furnace generally adopts the Passive LC filter circuit of low-pressure side parallel connection vacuum contactor switching, but because intermediate frequency power supply own power factor is higher, and the filter capacity of LC filter circuit is directly proportional to the installed capacity of capacitor, mend so too much installation capacitor can cause seriously to cross to electric power system, less condenser capacity again to harmonic wave without obvious filtration result, define the contradiction of reactive power compensation and harmonic wave control.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of intermediate frequency furnace mixed type dynamic filter compensation device, the mode that this device adopts LC filter circuit to combine with active filter APF, filter capacity significantly improves, do not need to drop into capacitor in a large number, benefit can not be caused to network system, and relatively high capacity active filter has equipment cost is low, cost performance is high feature.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of intermediate frequency furnace mixed type dynamic filter compensation device, comprise casing, it is characterized in that: in described casing, be provided with 5 LC filter circuits, 7 LC filter circuits, active filter APF and control system, electric power system is connected with intermediate frequency power supply through current transformer, described 5 LC filter circuits, 7 LC filter circuits and active filter APF are connected in parallel on the power line between current transformer and intermediate frequency power supply, every bar LC filter circuit comprises the circuit breaker be sequentially connected in series, contactor, filter reactor and filtering capacitor, control system detects the idle amount of power supply, control 5 LC filter circuits, the switching of 7 LC filter circuits and active filter APF, filtering is carried out to harmonic wave.
Preferred technical scheme is further: described circuit breaker is breaker of plastic casing, and described contactor is vacuum contactor.
The beneficial effect adopting technique scheme to produce is: the mode that this device adopts LC filter circuit to combine with active filter APF, filter capacity significantly improves, do not need to drop into capacitor in a large number, benefit can not be caused to network system, and relatively high capacity active filter has equipment cost is low, cost performance is high feature.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is theory diagram of the present utility model;
Wherein: 1, electric power system 2, current transformer 3, intermediate frequency power supply 4, circuit breaker 5, contactor 6, filter reactor 7, filtering capacitor 8, active filter APF9,5 LC filter circuits 10,7 LC filter circuits 11, control system.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Set forth a lot of detail in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when doing similar popularization without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public specific embodiment.
As shown in Figure 1, the utility model discloses a kind of intermediate frequency furnace mixed type dynamic filter compensation device, comprise casing, 5 LC filter circuits 9 are provided with in described casing, 7 LC filter circuits 10, active filter APF8 and control system 11, electric power system 1 is connected with intermediate frequency power supply 3 through current transformer 2, described 5 LC filter circuits 9, 7 LC filter circuits 10 and active filter APF8 are connected in parallel on the power line between current transformer 2 and intermediate frequency power supply 3, every bar LC filter circuit comprises the circuit breaker 4 be sequentially connected in series, contactor 5, filter reactor 6 and filtering capacitor 7, in order to ensure the safety and stability that device runs, described circuit breaker 4 uses breaker of plastic casing, described contactor 5 uses vacuum contactor.Control system 11 detects the idle amount of power supply, controls the switching of 5 LC filter circuits, 9,7 LC filter circuits 10 and active filter APF8, carries out filtering to harmonic wave.
General principle of the present utility model is: during intermediate frequency power supply work, control system, by voltage, current signal in detection system, calculates required idle amount by instantaneous reactive algorithm, drops into 5 times, 7 times filter circuits, filtering is carried out to system harmonics, and compensation power factor.APF active filter continues residue harmonic wave in detection system, decomposites system harmonics waveform, and provide an inverted waveform with harmonic carcellation by fast Fourier algorithm.
The utility model is made up of the active filter APF of low capacity and the LC filter circuit of low capacity, 5 times, 7 times, 11 times that produce for intermediate frequency furnace, 13 subharmonic carry out filtering, and energy compensating power, the existence of active filter APF part improves the filter capacity of device greatly.This hybrid mode filter capacity is remarkable, does not need to drop into capacitor in a large number, can not cause benefit to network system, and relatively high capacity active filter has equipment cost is low, cost performance is high feature.
Claims (2)
1. an intermediate frequency furnace mixed type dynamic filter compensation device, comprise casing, it is characterized in that: in described casing, be provided with 5 LC filter circuits (9), 7 LC filter circuits (10), active filter APF (8) and control system (11), electric power system (1) is connected with intermediate frequency power supply (3) through current transformer (2), described 5 LC filter circuits (9), 7 LC filter circuits (10) and active filter APF (8) are connected in parallel on the power line between current transformer (2) and intermediate frequency power supply (3), every bar LC filter circuit comprises the circuit breaker (4) be sequentially connected in series, contactor (5), filter reactor (6) and filtering capacitor (7), control system (11) detects the idle amount of power supply, control 5 LC filter circuits (9), the switching of 7 LC filter circuits (10) and active filter APF (8), filtering is carried out to harmonic wave.
2. intermediate frequency furnace mixed type dynamic filter compensation device according to claim 1, it is characterized in that: described circuit breaker (4) is breaker of plastic casing, described contactor (5) is vacuum contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471181.1U CN204118737U (en) | 2014-08-20 | 2014-08-20 | Intermediate frequency furnace mixed type dynamic filter compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471181.1U CN204118737U (en) | 2014-08-20 | 2014-08-20 | Intermediate frequency furnace mixed type dynamic filter compensation device |
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| Publication Number | Publication Date |
|---|---|
| CN204118737U true CN204118737U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420471181.1U Active CN204118737U (en) | 2014-08-20 | 2014-08-20 | Intermediate frequency furnace mixed type dynamic filter compensation device |
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| CN (1) | CN204118737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058877A (en) * | 2016-06-07 | 2016-10-26 | 李为人 | Intelligent low-voltage reactive power compensation device for medium frequency furnace |
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2014
- 2014-08-20 CN CN201420471181.1U patent/CN204118737U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058877A (en) * | 2016-06-07 | 2016-10-26 | 李为人 | Intelligent low-voltage reactive power compensation device for medium frequency furnace |
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| GR01 | Patent grant |