CN103606923A - Intermediate frequency furnace harmonic wave treatment and reactive power compensation apparatus - Google Patents
Intermediate frequency furnace harmonic wave treatment and reactive power compensation apparatus Download PDFInfo
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- CN103606923A CN103606923A CN201310556911.8A CN201310556911A CN103606923A CN 103606923 A CN103606923 A CN 103606923A CN 201310556911 A CN201310556911 A CN 201310556911A CN 103606923 A CN103606923 A CN 103606923A
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- intermediate frequency
- frequency furnace
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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
- Y02E40/30—Reactive power compensation
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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 invention provides an intermediate frequency furnace harmonic wave treatment and reactive power compensation apparatus. The apparatus comprises a cabinet body. The cabinet body internally comprises a micro computer intelligent controller, a three-phase four-wire power line, a knife-fusing switch, a lightning arrester, a current transformer and at least one filtering compensating circuit respectively connected with the phase line ends of a three-phase power source through the knife fusing switch. The filtering compensating circuit comprises a circuit breaker, a composite switch, a filter reactor and a filtering capacitor which are successively in electrical connection. According to the invention, through reasonable coupling of the filter reactor and the filtering capacitor, an electrical network is purified, the line loss of a power supply line is reduced, and the power factor is improved at the same time.
Description
Technical field
The present invention relates to power system automation technology field, refer to especially harmonic wave control and reactive power compensation setting for a kind of intermediate frequency furnace.
Background technology
In casting industry, the fusion process of metal is one pass key control operation, directly the material of product is produced to important impact, is to be finally related to product quality whether to reach requirement, fusion process is also one high-temperature process, and operator, equipment, factory building condition etc. are all had higher requirements.Therefore, foundry enterprise must be double cautious to the selection of smelting equipment.
Intermediate frequency furnace is a kind of supply unit that power frequency 50HZ alternating current is changed into intermediate frequency 300HZ to 1000HZ, three-phase main-frequency alternating current, after rectification, become direct current, again direct current is become to adjustable electric current of intermediate frequency, supply is by the intermediate frequency alternating current flowing through in electric capacity and induction coil, in induction coil, produce the highdensity magnetic line of force, and cut the metal material holding in induction coil, in metal material, produce very large eddy current.
Intermediate frequency furnace produces a large amount of harmonic waves in use, causes the harmonic pollution in electrical network very serious.Harmonic wave makes the Efficiency Decreasing of delivery of electrical energy and utilization, makes device of overheating of electrical, produces vibration and noise, and makes its ageing of insulation, and reduce useful life, even breaks down or burn; Harmonic wave can cause the local parallel resonance of electric power system or series resonance, and harmonic content is amplified, and causes the equipment burnouts such as capacitance compensation equipment.Therefore, intermediate frequency furnace harmonic wave control and reactive power compensation setting are widely used at present.
, mainly there is following several respects problem in existing intermediate frequency furnace harmonic wave control and reactive power compensation setting:
1, easily occur that harmonic wave is not controlled and original harmonic wave is amplified, being prone to the phenomenons such as numerical control device power panel burns.
2, electricity consumption enterprise power factor reduces, and user suffers power supply fine.
3, severe contamination electrical network.
As can be seen here, existing intermediate frequency furnace harmonic wave control and reactive power compensator, owing to cannot carrying out harmonic wave control, make equipment burnout, and electric network pollution is serious, and power factor reduces.
Summary of the invention
The present invention proposes a kind of intermediate frequency furnace harmonic wave control and reactive power compensator, has solved intermediate frequency furnace harmonic wave control of the prior art and reactive power compensator owing to cannot carrying out harmonic wave control, makes equipment burnout, and electric network pollution is serious, the problem that power factor reduces.
Technical scheme of the present invention is achieved in that
A kind of intermediate frequency furnace harmonic wave control and reactive power compensator, comprise: cabinet, cabinet inside comprises microcomputer-recognized intelligent controller, intermediate frequency furnace system, three phase mains, switch with knifeshaped fuse, the current transformer and at least one filtering compensation circuit that by switch with knifeshaped fuse, are connected respectively with the phase line end of three phase mains, and compensation filter circuit comprises circuit breaker, combination switch, filter reactor and the filtering capacitor being electrically connected to successively.
Preferably, circuit breaker is low-voltage circuit breaker.
Preferably, filtering capacitor is three-phase anti-harmonic capacitor, and filter reactor is three-phase tuning reactor.
Preferably, input R, the S of filter reactor is connected with combination switch with T, and output U, the V of filter reactor, T are connected with binding post A, B, the C of filtering capacitor respectively.
Preferably, the output of switch with knifeshaped fuse is connected with at least one lightning arrester.
Preferably, the output of current transformer is connected with the zero line of three phase mains with temperature detect switch (TDS) by blower fan group, and blower fan group is the blower fan of two parallel joins.
Preferably, also comprise capacitor switching indicator light circuit, capacitor switching indicator light circuit comprises at least one indicator light, and indicator light is connected between the A, C binding post of capacitor.
Preferably, also comprise power supply indicator circuit, power supply indicator circuit comprises two miniature circuit breaker QF1, QF2 and power supply indicator, and one end of miniature circuit breaker QF1 and QF2 is connected with power supply indicator, and the other end of miniature circuit breaker QF1 and QF2 is connected with current transformer respectively.
Preferably, also comprise ammeter, ammeter is connected with current transformer.
In the present invention, microcomputer-recognized intelligent controller is according to the data that collect and analysis conclusion out, by control signal, the line switching of the switch element in filtering compensation loop and each type load is controlled, after microcomputer-recognized intelligent controller detects data and makes control, can selectively control filtering compensation circuit, when all filtering compensation circuits can not meet appraisal standards, for power system security, the operation of guarantee capital equipment, microcomputer-recognized intelligent controller can send control command and disconnect on-load switch, cut off harmonic source, reach security purpose.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is principle schematic of the present invention;
Fig. 2 is circuit interconnect pattern of the present invention;
Fig. 3 is control principle drawing of the present invention;
Fig. 4 is the current measurement circuit schematic diagram shown in Fig. 3;
Fig. 5 a is the external power source circuit theory diagrams shown in Fig. 3;
Fig. 5 b is the capacitor switching indicator light circuit schematic diagram shown in Fig. 3;
Fig. 5 c is the power supply indicator circuit theory diagrams shown in Fig. 3.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1-2, intermediate frequency furnace harmonic wave control of the present invention and reactive power compensator, comprise: cabinet, cabinet outer setting has ammeter and signal lamp, cabinet inside comprises microcomputer-recognized intelligent controller, intermediate frequency furnace system and the system power supply being electrically connected to successively, switch with knifeshaped fuse QS, current transformer TA and filtering compensation circuit, microcomputer-recognized intelligent controller is used for carrying out data real-time analysis conversion, according to data, calculate and judge and send pulse to control the break-make of the switch element in filtering compensation circuit, filtering compensation circuit be realize high-power, the functional module of large electric current, can realize the object of filtering compensation.
Compensation filter circuit comprises the circuit breaker Q F being electrically connected to successively, combination switch QK, filter reactor QL and filtering capacitor C, wherein, intermediate frequency furnace system is electrically connected to system power supply, and intermediate frequency furnace system comprises intermediate frequency furnace and intermediate frequency furnace power supply, and system power supply is three power supplys, and the three phase mains in the present invention comprises power end L1, L2, L3, N, wherein, L1, L2, L3 is phase line, and N is zero line, power end L1, L2, the L3 respectively input corresponding with switch with knifeshaped fuse QS is connected in series, the output of switch with knifeshaped fuse QS connects respectively a lightning arrester FV and a current transformer TA, the output of current transformer TA is at least connected with a filtering compensation circuit, in the present invention, the number of filtering compensation circuit is n, n is greater than 1 positive integer, and each compensation filter circuit comprises the circuit breaker Q F being electrically connected to successively, combination switch QK, filter reactor QL and filtering capacitor C, the circuit structure of each compensation filter circuit in the present invention is identical, and take one of them compensation filter circuit is example, and filtering capacitor C1 is three-phase anti-harmonic capacitor, its inner employing triangle connected mode wiring, is provided with binding post A, B, C, filter reactor QL is three-phase tuning reactor, wherein, the input R1 of filter reactor QL1, S1 is connected with combination switch QK1 with T1, output U1, V1, T1 respectively with the binding post A of filtering capacitor C1, B, C connects, and preferred, circuit breaker Q F is low-voltage circuit breaker.
As shown in Figure 3, microcomputer-recognized intelligent controller in the present invention comprises that the interface 1 being connected with the Y-end of a plurality of combination switch QK is to interface n, interface 1-n connects to the Y-end of combination switch QK1 with corresponding combination switch QK1 respectively, the R+ end of combination switch QK is connected with one end of circuit breaker Q F, the other end of circuit breaker Q F is connected to the com interface end of microcomputer-recognized intelligent controller, the UB of microcomputer-recognized intelligent controller, UC port by change over switch SA1 respectively with current transformer TA1, the output 1L1 of TA2, 1L2 connects (as shown in Figure 2), the output 1L3 of current transformer TA3 is connected with zero line N with temperature detect switch (TDS) KW by blower fan group, preferably, blower fan group is the blower fan M1 of two parallel joins, M2, the interface La+ of microcomputer-recognized intelligent controller, La-end respectively with external power source interface S1, S2 end connect (as Fig. 5 a).
As shown in Figure 4, current measurement circuit in the present invention comprises the current transformer TA1-TA3 of three parallel joins and the ammeter A1-A3 being connected with corresponding current transformer respectively, current transformer TA is connected to ground wire PE end, as shown in Figure 5 b, capacitor switching indicator light circuit in the present invention comprises at least one indicator light HL, preferably, indicator light HL is n, n is greater than 1 positive integer, wherein indicator light HL1-HLn is connected to respectively the A of corresponding capacitor C1-Cn, between C binding post, as shown in Figure 5 c, power supply indicator circuit of the present invention comprises the indicator light HL being arranged between two miniature circuit breaker QF1 and QF2, one end of miniature circuit breaker QF1 and QF2 respectively with current transformer TA1, the 1L1 of TA2, 1L2 holds connection.
As in Figure 3-5, harmonic wave control principle of the present invention is to utilize LC oscillation principle, by adjusting inductance L and capacitor C parameter of oscillation filtering characteristic harmonics wherein; Principles of Reactive Compensation is by utilizing capacitor C to carry out reactive power compensation to system, and therefore capacitor C serves a dual purpose in the present invention.The circuit breaker Q F that intermediate frequency furnace of the present invention first closed in switch with knifeshaped fuse QS and each filtering compensation loop before work, this timer enters operating state, and the microcomputer-recognized intelligent controller in device detects the humorous power factor that involves of device.If intermediate frequency furnace is worked, microcomputer-recognized intelligent controller detects the humorous power factor that involves, testing result and microcomputer-recognized intelligent controller inner setting value compare, if measurement result reaches set point, microcomputer-recognized intelligent controller sends instruction puts combination switch QK successively into operation, after combination switch QK operation, by filter reactor QL, make also operation successively of filtering capacitor C, now A phase current table, B phase current table, C phase current table respectively in display unit L1, L2, each phase of L3 current values, HL1 to HLn is the operation of indicating device Zhong Mei road filter circuit respectively, the characteristic harmonics that operation produces to intermediate frequency furnace when QL and C operation (5 times, 7 times, 11 times, 13 times) carry out filtering, the power factor of system is compensated simultaneously, when intermediate frequency furnace quits work, microcomputer-recognized intelligent controller 3 detects the humorous power factor that involves lower than set point, microcomputer-recognized intelligent controller 3 sends instruction allows combination switch QK excise successively, filter reactor QL, filtering capacitor C is power-off successively also, A phase current table now, B phase current table, C phase current table is respectively zero, HL1 to HLn indication is extinguished gradually, the one action process of this timer finishes.
In the present invention, microcomputer-recognized intelligent controller, according to the data that collect and analysis conclusion out, is controlled the line switching of the switch element in filtering compensation loop and each type load by control signal.After microcomputer-recognized intelligent controller detects data and makes control, can selectively control filtering compensation circuit, when all filtering compensation circuits can not meet appraisal standards, for power system security, the operation of guarantee capital equipment, microcomputer-recognized intelligent controller can send control command and disconnect on-load switch, cut off harmonic source, reach security purpose.For filtering compensation circuit, there is different filter functions and compensate function, feeder number according to for the actual conditions of intermediate frequency furnace as equipment complexity and number of devices is different determines.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. an intermediate frequency furnace harmonic wave control and reactive power compensator, it is characterized in that, comprise: cabinet, described cabinet inside comprises microcomputer-recognized intelligent controller, three-phase four-wire power line, switch with knifeshaped fuse, the lightning arrester being connected with the phase line end of described three phase mains respectively by described switch with knifeshaped fuse and current transformer and at least one filtering compensation circuit, and described compensation filter circuit comprises circuit breaker, combination switch, filter reactor and the filtering capacitor being electrically connected to successively.
2. a kind of intermediate frequency furnace harmonic wave control according to claim 1 and reactive power compensator, is characterized in that, described circuit breaker is low-voltage circuit breaker.
3. a kind of intermediate frequency furnace harmonic wave control according to claim 1 and reactive power compensator, is characterized in that, described filtering capacitor is three-phase anti-harmonic capacitor, and described filter reactor is three-phase tuning reactor.
4. a kind of intermediate frequency furnace harmonic wave control according to claim 3 and reactive power compensator, it is characterized in that, input R, the S of described filter reactor is connected with combination switch with T, and output U, the V of described filter reactor, T are connected with binding post A, B, the C of filtering capacitor respectively.
5. a kind of intermediate frequency furnace harmonic wave control according to claim 1 and reactive power compensator, is characterized in that, the output of described switch with knifeshaped fuse is connected with one group of lightning arrester.
6. a kind of intermediate frequency furnace harmonic wave control according to claim 1 and reactive power compensator, is characterized in that, also comprises ammeter, and described ammeter is connected with described current transformer.
7. a kind of intermediate frequency furnace harmonic wave control according to claim 4 and reactive power compensator, it is characterized in that, also comprise capacitor switching indicator light circuit, described capacitor switching indicator light circuit comprises at least one indicator light, and described indicator light is connected between the A, C binding post of capacitor.
8. a kind of intermediate frequency furnace harmonic wave control according to claim 1 and reactive power compensator, it is characterized in that, also comprise power supply indicator circuit, described power supply indicator circuit comprises two miniature circuit breaker QF1, QF2 and power supply indicator, described miniature circuit breaker QF1, QF2 one end are connected with power supply indicator, and the other end of miniature circuit breaker QF1, QF2 is connected with 1L1, the 1L2 of current transformer lower end respectively.
9. a kind of intermediate frequency furnace harmonic wave control according to claim 1 and reactive power compensator, is characterized in that, the lower end of described current transformer is connected with zero line with temperature detect switch (TDS) by blower fan group, and described blower fan group is the blower fan of two parallel joins.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310556911.8A CN103606923A (en) | 2013-11-11 | 2013-11-11 | Intermediate frequency furnace harmonic wave treatment and reactive power compensation apparatus |
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| CN201310556911.8A CN103606923A (en) | 2013-11-11 | 2013-11-11 | Intermediate frequency furnace harmonic wave treatment and reactive power compensation apparatus |
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| CN103606923A true CN103606923A (en) | 2014-02-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201695A (en) * | 2014-09-15 | 2014-12-10 | 巨石集团有限公司 | Reactive compensation device and construction method thereof |
| CN106849124A (en) * | 2017-03-16 | 2017-06-13 | 上海柴德自动化有限公司 | A kind of low-voltage reactive power automatic compensation device |
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| CN2544452Y (en) * | 2002-06-15 | 2003-04-09 | 乐清市旭日无功动态补偿设备厂 | Low-voltage idle dynamic compensator |
| CN101572412A (en) * | 2009-06-12 | 2009-11-04 | 北京思能达电力技术有限公司 | High-capacity packet type switchgear |
| CN201682284U (en) * | 2010-04-02 | 2010-12-22 | 刘玉艳 | Mono-crystal furnace filtering compensation circuit |
| CN201774258U (en) * | 2010-06-29 | 2011-03-23 | 南京亚派科技实业有限公司 | Compensation filter module device |
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- 2013-11-11 CN CN201310556911.8A patent/CN103606923A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2544452Y (en) * | 2002-06-15 | 2003-04-09 | 乐清市旭日无功动态补偿设备厂 | Low-voltage idle dynamic compensator |
| CN101572412A (en) * | 2009-06-12 | 2009-11-04 | 北京思能达电力技术有限公司 | High-capacity packet type switchgear |
| CN201682284U (en) * | 2010-04-02 | 2010-12-22 | 刘玉艳 | Mono-crystal furnace filtering compensation circuit |
| CN201774258U (en) * | 2010-06-29 | 2011-03-23 | 南京亚派科技实业有限公司 | Compensation filter module device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104201695A (en) * | 2014-09-15 | 2014-12-10 | 巨石集团有限公司 | Reactive compensation device and construction method thereof |
| CN106849124A (en) * | 2017-03-16 | 2017-06-13 | 上海柴德自动化有限公司 | A kind of low-voltage reactive power automatic compensation device |
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Application publication date: 20140226 |