CN203014385U - Three-phase-equilibrium single-and-double-pole electroslag furnace - Google Patents
Three-phase-equilibrium single-and-double-pole electroslag furnace Download PDFInfo
- Publication number
- CN203014385U CN203014385U CN2012207137571U CN201220713757U CN203014385U CN 203014385 U CN203014385 U CN 203014385U CN 2012207137571 U CN2012207137571 U CN 2012207137571U CN 201220713757 U CN201220713757 U CN 201220713757U CN 203014385 U CN203014385 U CN 203014385U
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- phase
- transformer
- boiler
- electroslag furnace
- short net
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model discloses a three-phase-equilibrium single-and-double-pole electroslag furnace. A structure is characterized in that a correction device (1) is connected with a power-grid three-phase power supply (6) through a three-phase inlet wire; two phases of the power-grid three-phase power supply (6) are connected with a common electroslag furnace (2) through a transformer (7); an output terminal of an IGBT converter module (9) in the correction device (1) is connected with the three-phase inlet wire through a LCL filter circuit (8); an a end in a secondary coil of the transformer (7) is connected with an upper end of an electrode (4) in a boiler (5) via an A short net impedor (3); a bottom of the boiler (5) is connected with a b end in the secondary coil of the transformer (7) via a B short net impedor (11-B). The furnace has the following advantages that a three-phase imbalance problem caused by a single-phase electroslag furnace to the power grid is solved; a power factor of a load is increased, an influence caused by the unbalanced power grid is reduced and investment cost of a steel making enterprise is saved so that a purpose of energy conservation and emission reduction is achieved; an electric energy utilization rate is increased and pollution to the power grid is reduced.
Description
Technical field
The single bipolar electric slag hearth of a kind of three-phase equilibrium for steel-making enterprise metal smelting and alloy thereof that the utility model relates to.
Background technology
At present, the electroslag furnace that steel-making enterprise is used is substantially all single-phase electric slag furnace, mainly comprises two types: one pole and bipolar.In the electroslag furnace reflow process, along with the carrying out of fusing, electrode constantly shortens and steel ingot goes up gradually, has caused electrode resistance and steel ingot resistance to be in variable condition, thereby has caused the problem of voltage, current fluctuation.
Simultaneously, when enterprise uses single-phase electric slag furnace steel-making, be substantially all that the two-phase of choosing in electrical network A, B, C three-phase is connected to electroslag furnace through transformer, caused like this electric current that flows in electrical network to have one to be zero mutually, may cause three-phase imbalance.In order to solve unbalanced problem, Some Enterprises utilizes three single-phase electric slag furnaces to access respectively each phase of electrical network, avoids serious three-phase imbalance problem, so since, cost is relatively high, does not also meet the requirement of energy-saving and emission-reduction.
Summary of the invention
The utility model provides the single bipolar electric slag hearth of a kind of three-phase equilibrium, its objective is common electroslag furnace and deviation correcting device to solve the problem of three-phase imbalance as one, improved the power factor of load, reduce the production cost of enterprise, realize the purpose of energy-saving and emission-reduction.
technical solution of the present utility model: its structure is to comprise deviation correcting device, common electroslag furnace, short net impedance, electrode, boiler, three phase mains, transformer, the LCL filter circuit, wherein deviation correcting device is connected with the electrical network three phase mains by the three-phase inlet wire, two-phase in the electrical network three phase mains is connected with common electroslag furnace by transformer, the output of the IGBT unsteady flow module in deviation correcting device is connected with the three-phase inlet wire by the LCL filter circuit, a end in the secondary coil of transformer joins through the upper end of the A electrode in the short net impedance of A and boiler, the bottom of boiler joins through the end of the b in the secondary coil of the short net impedance of B and transformer.
The beneficial effects of the utility model: compared with prior art, solved the three-phase imbalance problem that single-phase electric slag furnace causes electrical network, improved the power factor of load, a series of impacts that the unbalanced power supply problem is brought have been reduced, saved the cost of investment of steel-making enterprise, reach simultaneously the purpose of energy-saving and emission-reduction, improved the utilance of electric energy, reduced the pollution to electrical network.
Description of drawings
Fig. 1 is the topological structure schematic diagram of one pole electroslag furnace.
Fig. 2 is the topological structure schematic diagram of bipolar electric slag hearth.
In figure 1 is deviation correcting device, the 2nd, common electroslag furnace, the 3rd, and the short net impedance of A, the 4th, A electrode, the 5th, boiler, the 6th, three phase mains, the 7th, transformer, the 8th, LCL filter circuit, the 9th, IGBT unsteady flow module the 9, the 10th, B electrode, 11-B are that the short net impedance of B, 12-C are the short net impedances of C.
Embodiment
Described deviation correcting device, its structure is comprised of LCL filter circuit 8, IGBT unsteady flow module 9, and IGBT unsteady flow module 9 adopts the three-phase half-bridge topology.
contrast Fig. 2, the single bipolar electric slag hearth of three-phase equilibrium, its structure is to comprise deviation correcting device 1, common electroslag furnace 2, short net impedance, electrode 4, boiler 5, three phase mains 6, transformer 7, LCL filter circuit 8, wherein deviation correcting device 1 is connected with electrical network three phase mains 6 by the three-phase inlet wire, two-phase in electrical network three phase mains 6 is connected with common electroslag furnace 2 by transformer 7, the output of the IGBT unsteady flow module 9 in deviation correcting device 1 is connected with the three-phase inlet wire by LCL filter circuit 8, a end in the secondary coil of transformer 7 joins through the upper end of the A electrode 4 in A short net impedance 3-A and boiler 5, b end in the secondary coil of transformer 7 joins through the upper end of the B electrode 10 in B short net impedance 11-B and boiler 5, the bottom of boiler 5 joins through 0 end in the secondary coil of C short net impedance 12-C and transformer 7.
During work, when common electroslag furnace 2 worked independently, the A, the B two-phase that are equivalent to electrical network were powered to common electroslag furnace 2, at the A of electrical network, the electric current that the B two-phase produces equal and opposite in direction, opposite direction; Use switching device to be insulated gate bipolar transistor IGBT, IGBT unsteady flow module 9 is connected with electrical network by LCL filter circuit 8, by controlling the break-make of the insulated gate bipolar transistor IGBT on IGBT unsteady flow module 9 each brachium pontis, reach the three-phase current of error correct device output;
After boiler work, deviation correcting device detects the inlet wire current of body of heater load in real time, by the analysis of uneven algorithm (dq algorithm), the real-time electric current that calculates three-phase equilibrium, the electric current of this three-phase equilibrium has identical real component with common electroslag furnace 2 when working independently; After the current subtraction that the target current of three-phase equilibrium and common electroslag furnace 2 self produce, instruction current as deviation correcting device, deviation correcting device trace command electric current, utilize the PWM modulator approach to produce the PWM ripple, the break-make of this PWM ripple control switch device is controlled the three-phase current that flows into the deviation correcting device in electrical network, through accessing electrical network after LCL filter circuit 8.At this moment, power network current is the electric current stack of deviation correcting device electric current and electroslag furnace self, realizes the three-phase equilibrium function of electroslag furnace.
The single bipolar electric slag hearth of three-phase equilibrium of the present invention can be applicable to most steel-making enterprise, the quality of power supply to electrical network requires higher area, this Novel electric slag hearth advantage is apparent in view, solved the three-phase imbalance problem that common single-phase electric slag furnace brings, improved the power factor of electroslag furnace, and to almost not the polluting of electrical network, guaranteed the quality of electric energy.
Claims (3)
1. the single bipolar electric slag hearth of three-phase equilibrium, it is characterized in that comprising deviation correcting device, common electroslag furnace, short net impedance, electrode, boiler, three phase mains, transformer, the LCL filter circuit, wherein deviation correcting device is connected with the electrical network three phase mains by the three-phase inlet wire, two-phase in the electrical network three phase mains is connected with common electroslag furnace by transformer, the output of the IGBT unsteady flow module in deviation correcting device is connected with the three-phase inlet wire by the LCL filter circuit, a end in the secondary coil of transformer joins through the upper end of the A electrode in the short net impedance of A and boiler, the bottom of boiler joins through the end of the b in the secondary coil of the short net impedance of B and transformer.
2. the single bipolar electric slag hearth of three-phase equilibrium according to claim 1, is characterized in that described deviation correcting device, and its structure is comprised of LCL filter circuit, IGBT unsteady flow module, and IGBT unsteady flow module adopts the three-phase half-bridge topology.
3. the single bipolar electric slag hearth of three-phase equilibrium according to claim 1, it is characterized in that a end in the secondary coil of described transformer joins through the upper end of the interior A electrode of the short net impedance of A and boiler, b end in the secondary coil of transformer joins through the upper end of the B electrode in the short net impedance of B and boiler, and the bottom of boiler joins through 0 end in the secondary coil of the short net impedance of C and transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207137571U CN203014385U (en) | 2012-12-21 | 2012-12-21 | Three-phase-equilibrium single-and-double-pole electroslag furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207137571U CN203014385U (en) | 2012-12-21 | 2012-12-21 | Three-phase-equilibrium single-and-double-pole electroslag furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203014385U true CN203014385U (en) | 2013-06-19 |
Family
ID=48605942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207137571U Expired - Lifetime CN203014385U (en) | 2012-12-21 | 2012-12-21 | Three-phase-equilibrium single-and-double-pole electroslag furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203014385U (en) |
-
2012
- 2012-12-21 CN CN2012207137571U patent/CN203014385U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |
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| CX01 | Expiry of patent term |