CN101728831B - Method for low-voltage thyristor reactive compensation switching of metallurgical electric furnace - Google Patents
Method for low-voltage thyristor reactive compensation switching of metallurgical electric furnace Download PDFInfo
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- CN101728831B CN101728831B CN2008100463224A CN200810046322A CN101728831B CN 101728831 B CN101728831 B CN 101728831B CN 2008100463224 A CN2008100463224 A CN 2008100463224A CN 200810046322 A CN200810046322 A CN 200810046322A CN 101728831 B CN101728831 B CN 101728831B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 239000010960 cold rolled steel Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 229910000616 Ferromanganese Inorganic materials 0.000 description 1
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon 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
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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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Abstract
The invention discloses a method for the low-voltage thyristor reactive compensation switching of a metallurgical electric furnace, which comprises: firstly, dividing capacitors and reactor groups in a reactive compensation device into a plurality of groups according to A, B, C phases under a condition that the current in each group is less than or equal to 200 amperes, wherein two thirds of the capacity of each phase is fixed switching; assembling a thyristor and a trigger circuit with a radiating fins, wherein the radiating fins adopt a water cooling circulation mode; connecting and fixing the thyristor, the capacitors and reactors by using copper conductors to form a group of thyristor ractive compensation switching unit; and finally, determining the number of static fixed thyristor switching compensation unit groups by using a thyristor reactive compensation switching controller according to a requirement that a power factor cos phi is equal to 0.9. The method has the advantages that: the demands for reactive compensation are satisfied when the normal production process conditions of the metallurgical electric furnace are met; the service life of the device is prolonged; the possibilities for undercompensation are eliminated; and overcompensation is avoided.
Description
Technical field
What the present invention relates to is the method for a kind of control method, particularly low-voltage thyristor reactive compensation switching of metallurgical electric furnace of executive component in the metallurgical electric furnace low-voltage reactive compensator capable.
Background technology
Metallurgical electric furnace is a kind of highly energy-consuming equipment, mainly is divided into a series surplus calcium carbide, industrial silicon, ferrosilicon, ferromanganese, ferronickel, the yellow phosphorus etc. 20.Device fabrication when operation voltage is low, and the big and electrode of electric current is constantly adjusted according to working of a furnace needs, and load variations is very fast, compensates because of self power factor lower (about 0.7～0.86) need install reactive power compensation device additional.
Traditional high-low pressure compensation arrangement is mainly by contactor, the circuit breaker system switching control element as reactive power compensator.Major defect has:
1: owing to contactor, circuit breaker action element are electromagnetic induction type; It is because of there being about 40～60ms operate time; So can't be when voltage, current over-zero switching, shove greatlyyer thereby cause to close a floodgate to impact, reduce useful life of executive components such as capacitor and contactor.
2: because its intrinsic operating characteristics, be prone to cause switching overvoltage, separating brake must wait capacitor to put electric (about 3 minutes) after once and could close a floodgate next time, can't satisfy in the metallurgical electric furnace rise fall of electrodes process technological requirement to the quick switching of reactive power compensation.
3: adopt the mode of cutting earlier of throwing earlier, the frequent element of mechanical action number of times is short useful life.
Therefore, a kind of no current of market demand, voltge surge, the fast novel switching element of response speed satisfy under the metallurgical electric furnace ordinary production process conditions demand to the reactive power compensation amount.
Summary of the invention
The method of the low-voltage thyristor reactive compensation switching of metallurgical electric furnace that the purpose of this invention is to provide is in the metallurgical electric furnace production process, to take method dynamic and the static thuristor throw-in and throw-off reactive power compensator that combines.
Technical scheme of the present invention is following:
The method of low-voltage thyristor reactive compensation switching of metallurgical electric furnace is characterized in that:
1, the capacitor in the reactive power compensator and reactor group are divided into some groups by the principle of A, B, every group of electric current≤200A of C three-phase, i.e. A
1, A
2... A
n, B
1, B
2... B
n, C
1, C
2... C
n, the capacity of every phase 2/3 is as fixing switching, and guaranteeing the needs of basic compensation rate, 1/3 capacity is as dynamically to guarantee the needs of electrode movement compensation rate.The principle of electric current≤200A is the present manufacture level decision of thyristor;
2, thyristor and circuits for triggering and fin are assembled, fin adopts the water-cooled endless form, and external application cold-rolled steel sheet shell encapsulates, to solve in the hot stove production process in metallurgical ore deposit dust and high temperature to problems such as thyristor work are unfavorable;
IGCT and capacitor and reactor are connected and fixed by copper conductor; Form one group of thyristor reactive compensation switching unit; By 16 little process chip control thyristor reactive compensation switching unit switching controllers, AC Data is implemented fast detecting and compensation;
3, select the thuristor throw-in and throw-off compensating unit group number of stationary by the requirement of powerfactorcos=0.9; As long as electric furnace production promptly all puts into operation; Do not do dynamic switching; Guarantee in the metallurgical electric furnace production process that to idle basic demand remaining element is as dynamic switching cell capability, to adapt in the production process on the electric furnace electrode or the reactive requirement during motion down.
The switching of said thyristor is all in 20ms.
Beneficial effect of the present invention is following:
The present invention possesses no current, voltge surge, the fast novel switching element of response speed and satisfies under the metallurgical electric furnace ordinary production process conditions demand to the reactive power compensation amount; Drop into when detecting voltage zero-cross, excise during current over-zero through controller, impacts of shoving of no static state, no arc reignition installs the prolongation in useful life; Simultaneously, because the existence of stationary unit is arranged, got rid of the possibility of owing to mend; Because dynamically switching unit list pool-size is less, the group number is more, and the situation of avoiding mending takes place.
Description of drawings
Fig. 1 is the composition structural representation of the system that the present invention used
Fig. 2 is the structural representation of thyristor and circuits for triggering and fin
Wherein, Reference numeral is (1): current transducer, (2): voltage transmitter, (3): communication lead, (4): man-machine interface, (5): thyristor.
Embodiment
The method of low-voltage thyristor reactive compensation switching of metallurgical electric furnace is characterized in that:
1, the capacitor in the reactive power compensator and reactor group are divided into some groups by the principle of A, B, every group of electric current≤200A of C three-phase, i.e. A
1, A
2... A
n, B
1, B
2... B
n, C
1, C
2... C
n, the capacity of every phase 2/3 is as fixing switching, and guaranteeing the needs of basic compensation rate, 1/3 capacity is as dynamically to guarantee the needs of electrode movement compensation rate.The principle of electric current≤200A is the present manufacture level decision of thyristor;
2, thyristor and circuits for triggering and fin are assembled, fin adopts the water-cooled endless form, and external application cold-rolled steel sheet shell encapsulates, to solve in the hot stove production process in metallurgical ore deposit dust and high temperature to problems such as thyristor work are unfavorable;
IGCT and capacitor and reactor are connected and fixed by copper conductor; Form one group of thyristor reactive compensation switching unit; By 16 little process chip control thyristor reactive compensation switching unit switching controllers, AC Data is implemented fast detecting and compensation;
3, select the thuristor throw-in and throw-off compensating unit group number of stationary by the requirement of powerfactorcos=0.9; As long as electric furnace production promptly all puts into operation; Do not do dynamic switching; Guarantee in the metallurgical electric furnace production process that to idle basic demand remaining element is as dynamic switching cell capability, to adapt in the production process on the electric furnace electrode or the reactive requirement during motion down.
The switching of said thyristor is all in 20ms.
Shown in Fig. 1-2, application of the present invention is following:
1, on metallurgical electric furnace high side switch cabinet terminal board through current transducer 1., voltage transmitter 2. A, B, C three-phase current, voltage signal; 3. secondary singal is passed to the controller input through the communication lead, controller sends pulse triggering signal after handling through cpu system.
2, when metallurgical electric furnace power≤0.9, pulse signal drives stationary switching unit, and when voltage zero-cross, each respectively organizes conducting thyristor mutually and 5. drop in proper order by the time interval of 1 cycle, makes power factor reach 0.9.
3, after metallurgical electric furnace power reaches 0.9, controller continues through sample analysis, sends pulse signal to switching unit and continues to drop into by 2. mode, makes power factor reach 0.95 (this value can be set at 0.91～0.95).If electric furnace electrode moves according to the condition of production, this moment, controller can detect in real time.When electrode descended, the reactive requirement amount was big, and dynamically the switching unit continues to put into operation; When electrode promoted, the reactive requirement amount reduced, and dynamically operation is released in the switching unit, makes power factor reach set point (0.91～0.95).
Claims (2)
1. the method for low-voltage thyristor reactive compensation switching of metallurgical electric furnace is characterized in that:
A, the capacitor in the reactive power compensator and reactor group are divided into some groups by the principle of A, B, every group of electric current≤200A of C three-phase, i.e. A
1, A
2... A
n, B
1, B
2... B
n, C
1, C
2... C
n, the capacity of every phase 2/3 is as fixing switching;
B, thyristor and circuits for triggering and fin are assembled, fin adopts the water-cooled endless form, and external application cold-rolled steel sheet shell encapsulates; Thyristor and capacitor and reactor are connected fixing through copper conductor, form one group of thyristor reactive compensation switching unit, through 16 little process chip control thyristor reactive compensation switching unit switching controllers;
C, select the thuristor throw-in and throw-off compensating unit group number of stationary by the requirement of powerfactorcos=0.9; As long as electric furnace production is that the thuristor throw-in and throw-off compensating unit all puts into operation; Do not do dynamic switching; Guarantee in the metallurgical electric furnace production process that to idle basic demand remaining element is as dynamic switching cell capability, to adapt in the production process on the electric furnace electrode or the reactive requirement during motion down.
2. according to the method for the said low-voltage thyristor reactive compensation switching of metallurgical electric furnace of claim 1, it is characterized in that: the switching of said thyristor is all in 20ms.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100463224A CN101728831B (en) | 2008-10-20 | 2008-10-20 | Method for low-voltage thyristor reactive compensation switching of metallurgical electric furnace |
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|---|---|---|---|
| CN2008100463224A CN101728831B (en) | 2008-10-20 | 2008-10-20 | Method for low-voltage thyristor reactive compensation switching of metallurgical electric furnace |
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|---|---|
| CN101728831A CN101728831A (en) | 2010-06-09 |
| CN101728831B true CN101728831B (en) | 2012-02-15 |
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| DK2747233T3 (en) * | 2012-12-21 | 2016-03-21 | Alstom Technology Ltd | An apparatus and method for load compensation |
| CN103618318A (en) * | 2013-11-21 | 2014-03-05 | 乐山晟嘉电气有限公司 | Submerged arc furnace reactive power compensation system and method with static state and dynamic state combined |
| CN108964092B (en) * | 2017-05-22 | 2019-05-21 | 菏泽峥艳电力科技有限公司 | The method of gradual strategy adjustment low-voltage network imbalance of three-phase voltage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1375903A (en) * | 2002-04-26 | 2002-10-23 | 白玉龙 | Secondary low-voltage compensator for electric furnace |
| CN1507129A (en) * | 2002-12-11 | 2004-06-23 | 中国冶金技术公司 | Reactive power conpensating method |
| CN1808826A (en) * | 2005-12-20 | 2006-07-26 | 顺特电气有限公司 | Dynamic reactive compensation control method |
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- 2008-10-20 CN CN2008100463224A patent/CN101728831B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1375903A (en) * | 2002-04-26 | 2002-10-23 | 白玉龙 | Secondary low-voltage compensator for electric furnace |
| CN1507129A (en) * | 2002-12-11 | 2004-06-23 | 中国冶金技术公司 | Reactive power conpensating method |
| CN1808826A (en) * | 2005-12-20 | 2006-07-26 | 顺特电气有限公司 | Dynamic reactive compensation control method |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2003-324847A 2003.11.14 |
| 魏香臣.控制功率因数的变化对减少电炉损失的作用.《铁合金》.2003,第35页至第37页. * |
| 麻林伟等.铁合金电炉设计与无功补偿配置的分析.《冶金设备》.2007,第28页至第30页. * |
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Denomination of invention: Method for low-voltage thyristor reactive compensation switching of metallurgical electric furnace Effective date of registration: 20131224 Granted publication date: 20120215 Pledgee: Leshan City Commercial Bank Limited by Share Ltd Sales Department Pledgor: Leshan Chengjia Electric Co., Ltd. Registration number: 2013990001021 |
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Owner name: LESHAN SHENGJIA ELECTRIC CO., LTD. Free format text: FORMER NAME: LESHAN CHENGJIA ELECTRIC CO., LTD. |
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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 Chengjia Electric Co., Ltd. |
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Date of cancellation: 20160309 Granted publication date: 20120215 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 thyristor reactive compensation switching of metallurgical electric furnace Effective date of registration: 20160309 Granted publication date: 20120215 Pledgee: Leshan City Commercial Bank Limited by Share Ltd Sales Department Pledgor: Leshan Shengjia Electric Co., Ltd. Registration number: 2016990000187 |
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Date of cancellation: 20170718 Granted publication date: 20120215 Pledgee: Leshan City Commercial Bank Limited by Share Ltd Sales Department Pledgor: Leshan Shengjia Electric Co., Ltd. Registration number: 2016990000187 |
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Denomination of invention: Method for low-voltage thyristor reactive compensation switching of metallurgical electric furnace Effective date of registration: 20170801 Granted publication date: 20120215 Pledgee: Leshan City Commercial Bank Limited by Share Ltd Sales Department Pledgor: Leshan Shengjia Electric Co., Ltd. Registration number: 2017510000043 |
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