CN101730327B - Method for low-voltage filter reactive compensation of metallurgical electric furnace - Google Patents
Method for low-voltage filter reactive compensation of metallurgical electric furnace Download PDFInfo
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- CN101730327B CN101730327B CN2008100463277A CN200810046327A CN101730327B CN 101730327 B CN101730327 B CN 101730327B CN 2008100463277 A CN2008100463277 A CN 2008100463277A CN 200810046327 A CN200810046327 A CN 200810046327A CN 101730327 B CN101730327 B CN 101730327B
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- electric furnace
- cooled cable
- metallurgical
- cooled
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- 238000000034 method Methods 0.000 title claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000006698 induction Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 8
- 238000004804 winding Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004922 lacquer Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910000720 Silicomanganese Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a method for the low-voltage filter reactive compensation of a metallurgical electric furnace, which is characterized in that under a harmonic background condition, the reactive compensation power required by a water-cooled cable and a copper electrode is mainly provided by a filter compensation device by connecting the filter compensation device with the tail end of the water-cooled cable. The method ensures that the power factor of the metallurgical electric furnace meets national standards for energy conservation and that equipment can operate for a long time under the harmonic background condition, as well as reduces product unit consumption, improves economic benefits and reduces energy consumption.
Description
Technical field
The present invention relates to the method in metallurgical electric furnace field, particularly low-voltage filter reactive compensation of metallurgical electric furnace.
Background technology
Metallurgical electric furnace is a kind of highly energy-consuming equipment, mainly be divided into a kind surplus calcium carbide, industrial silicon, ferrosilicon, silicomanganese, ferronickel, the yellow phosphorus etc. 20, mainly partly be made of switch power supply unit, control appliance, furnace transformer, water-cooled (copper pipe), water-cooled cable, steel watt, electrode, body of heater, burner hearth etc., present domestic heap(ed) capacity is 40MVA.
Because a large amount of inductive part event load character amount perception of using, natural power factor own is than low about 0.7～0.8.Self reactive power demand is bigger, from energy-saving and cost-reducing and enterprise self economic benefit angle, need install a large amount of Electric capacity compensation devices additional in electric power system.
The prior art major part all is to add capacitor in the high-pressure side of metallurgical electric furnace, to satisfy the needs of electric furnace reactive power.This technology is comparatively ripe, compensate reason owing to the compensation arrangement installation site in the furnace high-voltage side, can only reduce reactive requirement to the power supply unit before the mounting points, reduce electric current, so can only solve the consume problem of supply line, and the electric current of the key node of smelter power consumptions such as metallurgical electric furnace transformer and short net itself does not reduce.Because energy consumption=3I
2.R, so under the certain situation of current value and short net resistance value, enterprise self power consumption does not reduce.
Summary of the invention
The present invention is for addressing the above problem the method that a kind of low-voltage filter reactive compensation of metallurgical electric furnace is provided, the power factor that can guarantee metallurgical electric furnace meets national energy-conservation requirement and equipment can operation steady in a long-term under the harmonic background condition, can reduce the unit consumption of product, increase economic efficiency.
Technical scheme of the present invention is as follows:
The method of low-voltage filter reactive compensation of metallurgical electric furnace is characterized in that: under the harmonic background condition, by at the terminal filtering compensation device in parallel of water-cooled cable, the required reactive power compensation power of water-cooled cable and copper pipe electrode is mainly provided by filtering compensation device.
The reactive power of described water-cooled copper, furnace transformer and supply line and harmonic current reduce, and under identical active load condition, the electric current that flows through above equipment reduces.
Beneficial effect of the present invention is as follows:
The present invention guarantees that the power factor of metallurgical electric furnace meets national energy-conservation requirement and equipment can long-term stability move under the harmonic background condition, can reduce the unit consumption of product, increases economic efficiency, and can reach the purpose that cuts down the consumption of energy.
Description of drawings
Fig. 1 is the composition structural representation of system that the present invention uses
Wherein, be labeled as (1): electric power system, (2): supply line, (3): metallurgical electric furnace transformer, (4): short net (water-cooled copper), (5): first water-cooled cable, (6): electrode, (7): body of heater, (8): filter reactor, (9): filtering capacitor, (10): second water-cooled cable.
Embodiment
Embodiment 1
A kind of method of low-voltage filter reactive compensation of metallurgical electric furnace under the harmonic background condition, by at the terminal filtering compensation device in parallel of water-cooled cable, is mainly provided the required reactive power compensation power of water-cooled cable and copper pipe electrode by filtering compensation device.
The reactive power of described water-cooled copper, furnace transformer and supply line and harmonic current reduce, and under identical active load condition, the electric current that flows through above equipment reduces, thereby reaches the purpose that cuts down the consumption of energy.
Structure of the present invention is formed as shown in Figure 1, electric power system 1, supply line 2, metallurgical electric furnace transformer 3, water-cooled copper 4 are by 5 series connection of first water-cooled cable, the front end of first water-cooled cable 5 connects the filtering compensation device terminal in parallel of water-cooled copper 4, the first water-cooled cables 5; Described filtering compensation device refers to form by second water-cooled cable 10 filter reactor 8, filtering capacitor 9 that be cascaded; Electrode 6 lower ends are metallurgical circuit body of heater 7, will produce under the condition of 3 order harmonic components in as harmonic source production run process at metallurgical circuit, and the principle by capacitive reactance and induction reactance equate forms low-impedance filtering compensation device.According to Kirchhoff's law as can be known: through the electric current I of electrode 6, metallurgical circuit body of heater 7
3=through the electric current I of first water-cooled cable 5
1+ the electric current I of wave reactor 8, filtering capacitor 9 after filtration
2, namely when required idle under the situation of definite value of electrode 6 equipment such as grade, install filtering compensation device additional after because I
2The increase effect, I
1To greatly reduce, thereby the reactive current of the electric power system 1 of flowing through, supply line 2, metallurgical electric furnace transformer 3, water-cooled copper 4, first water-cooled cable 5 is reduced, reach energy saving purposes.
The end of described first water-cooled cable 5 is connected simultaneously with second water-cooled cable 10, the electrode 6 of filtering compensation device;
Filter reactive compensation device front end is connected with first water-cooled cable 5 by second water-cooled cable 10, filter reactor and filter capacitor are in series, and the amount of capacity according to filtering compensation device can be divided into many groups, every group of electric current is no more than 400A, to avoid the useful life of conductor warming-up effect capacitor.
The key technology of this method is the matching problem of reactor and capacitor parameters under the harmonic background condition.That is: compensation condenser and electrical network induction reactance generation parallel resonance in the distribution system, usually can be in capacitor loops series reactor, if series resonance takes place in the capacitance C of the inductance L of series reactor and compensation condenser under 3 subharmonic, i.e. X
L=X
CThen 3 subharmonic will not flow into electrical network, therefore must keep reactor precision and inductance value to adjust.
Embodiment 2
For structure shown in Figure 1, practical application of the present invention.
1: by power quality analyzer metallurgical electric furnace ordinary production time-harmonic wave situation is surveyed.The current/voltage secondary singal of probe A, B, C three-phase in the high-tension switch cabinet terminal board by tester.
2: by computer program in the power quality analyzer, analyze 1～25 subharmonic current and the fundamental active power numerical value of metallurgical electric furnace.
3: draw the reactive power compensation capacitance capacity that electric furnace need install and calculate capacitor value according to above numerical value and power factor calculating table, simultaneously, draw filter induction reactance value according to series connection harmonic wave principle and begin to make reactor.The making step of reactor is as follows:
1. carcasing:
A, blanking: carry out the blanking of yellow wax plate by the figure paper size.
B, skeleton assembly unit: carry out each parts of skeleton by drawing, carry out skeleton component assembly unit, assembly unit then
2. the coiling of coil:
The coiling of a, coil adopt multilayer and around mode.
B, press under the figure paper size the good required silk-covered wire of each layer winding.Accurate as far as possible during blanking, to avoid the waste of silk-covered wire.
To carry out the sign of each layer when c, following silk-covered wire, in order to avoid the entanglement of each layer order.
D, descending silk-covered wire is at first reserved 70mm, carry out with glass tape the silk-covered wire chieftain being fixed on the skeleton after 90 ° of bendings at the 70mm place then.
Want strict control threading speed in e, the coil winding process, coil whenever will strike coil tightly with wooden mallet around one section, guarantees that interlayer and turn-to-turn fit tightly, and the strict designing requirement coiling number of turn of pressing.
F, line ball nose: elder generation carries out insulating barrier according to the place of the sub-consistent size of big young pathbreaker's winding head of line nose and oxide layer is handled, and to guarantee the good contact of good the end of a thread of line nose, colds pressing then.
G, the coil of finishing of will colding pressing carry out brazing.The insulating barrier of too high damage silk-covered wire, welding back are to line nose h, twine coil with glass tape, and direction wants consistent during winding, accomplishes neat appearance.
3. the installation of silicon steel sheet
The installation of silicon steel sheet in a, the skeleton: must accomplish when intraskeletal silicon steel sheet is installed that closely any becoming flexible can not be arranged, two faces must be smooth, and it is consistent that two back gauges are wanted.
After b, the intraskeletal silicon steel sheet installation, the coil of three-phase is lain in together air gap scraps of paper on each pad on the intraskeletal silicon steel sheet, and then three silicon steel sheets that are connected of packing into then.
4. carry out energizing test: feed its rated current to assembling the reactor single phase winding of finishing, measure the pressure drop at coil two ends again with voltmeter.If the actual measurement pressure drop is lower than design load, then should reduces the air gap of silicon steel sheet, otherwise then should increase the air gap of silicon steel sheet.
5. toast dipping lacquer:
After a, test finished, the reactor that parameter adjustment is good was put into baking box and is toasted.Baking the temperature inside the box is set to 150 ° and is advisable, stoving time reaches 140 ° with the temperature inside the box and is advisable, then baking box internal reactance device is put into the container dipping lacquer that insulating varnish is housed, the insulating varnish complete submergence reactor of will trying one's best is to guarantee the immersion fully of insulating varnish in the reactor.
B, the reactor after dipping lacquer finished take out and carry out water clock, put into baking box again and carry out 2 bakings, and take out the oven dry back.
4: reactor 8 and capacitor 9 be together in series is made into filtering compensation device.
5: by be flexible coupling 10 with 8,9 with 5 terminal linking to each other of water-cooled cable of short net.
6: control 8,9 input and cut-out by thyristor, power factor is low＜and 0.9 device drops into power factor＞0.9 o'clock excision.
Claims (2)
1. the method for low-voltage filter reactive compensation of metallurgical electric furnace, it is characterized in that: under the harmonic background condition, electric power system (1), supply line (2), metallurgical electric furnace transformer (3), water-cooled copper (4), first water-cooled cable (5) is connected successively, the front end of first water-cooled cable (5) connects water-cooled copper (4), the end of first water-cooled cable (5) connects filtering compensation device, makes electric power system (1), supply line (2), metallurgical electric furnace transformer (3), copper pipe (4), the required reactive power compensation power of first water-cooled cable (5) is mainly provided by filtering compensation device;
Described filtering compensation device is to be connected successively by second water-cooled cable (10), filter reactor (8), filtering capacitor (9) to form;
The end of described first water-cooled cable (5) is connected simultaneously with second water-cooled cable (10), the electrode (6) of filtering compensation device, electrode (6) lower end is metallurgical electric furnace body of heater (7), principle by capacitive reactance and induction reactance equate forms low-impedance filtering compensation device; According to Kirchhoff's law as can be known: through the electric current I of electrode (6), metallurgical electric furnace body of heater (7)
3=through the electric current I of first water-cooled cable (5)
1+ the electric current I of wave reactor (8), filtering capacitor (9) after filtration
2, namely when required idle under the situation of definite value of electrode (6), install filtering compensation device additional after because I
2The increase effect, I
1To greatly reduce, thereby the reactive current of electric power system (1), supply line (2), metallurgical electric furnace transformer (3), water-cooled copper (4), first water-cooled cable (5) reduces;
Described harmonic background condition refers to that metallurgical electric furnace will produce the condition of the harmonic component more than 2 times as harmonic source in the production run process.
2. according to the method for the described low-voltage filter reactive compensation of metallurgical electric furnace of claim 1, it is characterized in that: the reactive power of described supply line (2), metallurgical electric furnace transformer (3), water-cooled copper (4) and harmonic current reduce, under identical active load condition, the electric current that flows through above equipment reduces, thereby reaches the purpose that cuts down the consumption of energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100463277A CN101730327B (en) | 2008-10-20 | 2008-10-20 | Method for low-voltage filter reactive compensation of metallurgical electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100463277A CN101730327B (en) | 2008-10-20 | 2008-10-20 | Method for low-voltage filter reactive compensation of metallurgical electric furnace |
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| Publication Number | Publication Date |
|---|---|
| CN101730327A CN101730327A (en) | 2010-06-09 |
| CN101730327B true CN101730327B (en) | 2013-09-25 |
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|---|---|---|---|
| CN2008100463277A Active CN101730327B (en) | 2008-10-20 | 2008-10-20 | Method for low-voltage filter reactive compensation of metallurgical electric furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222926A (en) * | 2011-06-23 | 2011-10-19 | 乐山晟嘉电气有限公司 | Reactive compensation structure for metallurgical submerged-arc furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201134691Y (en) * | 2007-12-24 | 2008-10-15 | 深圳市迪比科电子科技有限公司 | Movable power source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201134691Y (en) * | 2007-12-24 | 2008-10-15 | 深圳市迪比科电子科技有限公司 | Movable power source |
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| CN101730327A (en) | 2010-06-09 |
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Denomination of invention: Method for low-voltage filter reactive compensation of metallurgical electric furnace Effective date of registration: 20131224 Granted publication date: 20130925 Pledgee: Leshan City Commercial Bank Limited by Share Ltd. Sales Department Pledgor: Leshan Energy Saving Joy Electric Co.,Ltd. Registration number: 2013990001021 |
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Address after: 614000 No. 3, west section of Lego Road, Leshan hi tech Development Zone, Sichuan Patentee after: LESHAN SHENGJIA ELECTRIC Co.,Ltd. Address before: 614000 No. 3, west section of Lego Road, Leshan hi tech Development Zone, Sichuan Patentee before: Leshan Energy Saving Joy Electric Co.,Ltd. |
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Date of cancellation: 20160309 Granted publication date: 20130925 Pledgee: Leshan City Commercial Bank Limited by Share Ltd. Sales Department Pledgor: LESHAN SHENGJIA ELECTRIC Co.,Ltd. Registration number: 2013990001021 |
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Denomination of invention: Method for low-voltage filter reactive compensation of metallurgical electric furnace Effective date of registration: 20160309 Granted publication date: 20130925 Pledgee: Leshan City Commercial Bank Limited by Share Ltd. Sales Department Pledgor: LESHAN SHENGJIA ELECTRIC Co.,Ltd. Registration number: 2016990000187 |
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Change date: 20160309 Registration number: 2013990001021 Pledgor after: LESHAN SHENGJIA ELECTRIC Co.,Ltd. Pledgor before: Leshan Energy Saving Joy Electric Co.,Ltd. |
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Date of cancellation: 20170718 Granted publication date: 20130925 Pledgee: Leshan City Commercial Bank Limited by Share Ltd. Sales Department Pledgor: LESHAN SHENGJIA ELECTRIC Co.,Ltd. Registration number: 2016990000187 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Method for low-voltage filter reactive compensation of metallurgical electric furnace Effective date of registration: 20170801 Granted publication date: 20130925 Pledgee: Leshan City Commercial Bank Limited by Share Ltd. Sales Department Pledgor: LESHAN SHENGJIA ELECTRIC Co.,Ltd. Registration number: 2017510000043 |
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Address after: 614000 No. 3, west section of Lego Road, Leshan hi tech Development Zone, Sichuan Patentee after: Sichuan weilide Energy Co.,Ltd. Address before: 614000 No. 3, west section of Lego Road, Leshan hi tech Development Zone, Sichuan Patentee before: LESHAN SHENGJIA ELECTRIC Co.,Ltd. |