CN1481198A - Equipment for compensating wattless power of electric arc furnace - Google Patents
Equipment for compensating wattless power of electric arc furnace Download PDFInfo
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- CN1481198A CN1481198A CNA031467695A CN03146769A CN1481198A CN 1481198 A CN1481198 A CN 1481198A CN A031467695 A CNA031467695 A CN A031467695A CN 03146769 A CN03146769 A CN 03146769A CN 1481198 A CN1481198 A CN 1481198A
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- arc furnace
- reactive power
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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
- 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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Abstract
The equipment includes primary winding, secondary winding of transformer, reactive power componsator of electric arc furnace, current transformer, potential transformer and test controller for reactive power, and especially, the secondary self coupled winding. The secondary self-coupled winding formed by adding part of winding to original winding at secondary side of transformer of electric arc furnace provides suitable operational voltage and current for reactive power componsator. The componsator connected to ends of coil out a', b', c' can compensate reactive power consumption of furnace as well as zero load reactive loss Qo and short circuit reactive loss Qk in operation of transformer. Thus, voltage of ends of coil out at low voltage side of transformer is stable. The equipment is a feasible reactive power compensator.
Description
One. technical field
Compensating gear reactive power of electric arc furnace disclosed by the invention belongs to electrical equipment technical field, and this device is to compensate arc furnace transformer short-circuit reactance and system reactance, the constant substantially practicable Compensating gear reactive power of electric arc furnace of pilot arc furnace transformer low-voltage side outlet terminal voltage.
Two. background technology
Arc furnace transformer is generally 10.5KV, 35KV, 110KV, 220KV etc. according to its capacity high side voltage, and low-pressure side voltage is usually in 40V～800V scope.Arc furnace transformer high-pressure side, low-pressure side voltage almost are directly proportional with the arc furnace transformer capacity.Arc furnace is carried out reactive power compensation,, the voltage height, realize that difficulty is big, cost is high if in high-pressure side compensation; If in low-pressure side compensation, brownout, electric current are very big, still all are difficult to economically technically realize.So present both at home and abroad arc furnace operation all is difficult to take the reactive power compensation measure.
The access point of the super-huge Compensating gear reactive power of electric arc furnace of existing minority all is chosen on the arc furnace transformer high-voltage side bus.Reactive power compensator can be self-saturation reactance type SVC, Thyristor Controlled reactance type (TCR) SVC, thyristor grouping switching capacitor group type (TSC) SVC etc., its shortcoming mainly is that SVC can compensate the upstream reactance of arc furnace transformer high-pressure side, pilot arc furnace transformer high-voltage side bus voltage is constant substantially, compensation effect is little, and the cost height, is difficult in practice implement.
Three. summary of the invention
Task of the present invention is a kind of novel Compensating gear reactive power of electric arc furnace of development, main points are vertically to increase a self coupling winding at arc furnace transformer low-pressure side winding, for the arc furnace reactive power compensator provides a suitable operating voltage and current margin.The voltage of this self coupling winding and capacity are determined by the capacity of arc furnace reactive power compensator.This arc furnace reactive power compensator can be voltage-type SVC, and the Compensating gear reactive power of electric arc furnace overall cost is reduced greatly, and every performance improves greatly, is easy in practice implement.
The objective of the invention is to release a kind of technology contents of novel Compensating gear reactive power of electric arc furnace, for saving electric power energy and promoting the electrometallurgy industrial development to contribute to society.
The technical scheme of Compensating gear reactive power of electric arc furnace of the present invention is such: this Compensating gear reactive power of electric arc furnace, it includes: the elementary winding 1 in arc furnace transformer high-pressure side, low-pressure side secondary winding 2, arc furnace reactive power compensator 5, current transformer 6, voltage transformer 7 and reactive power controller 8, common function assembles and forms, and technical characterstic is: this device also includes a secondary self coupling winding 3 in the arc furnace transformer low-pressure side.The self coupling winding 3 that this increases newly provides suitable operating voltage and operating current for arc furnace reactive power compensator 5.
According to above-described Compensating gear reactive power of electric arc furnace, detailed technical characterstic has: the secondary self coupling winding 3 of described arc furnace transformer low-pressure side constitutes by vertically increasing the part winding on the former secondary winding 2 of arc furnace transformer low-pressure side.Flow through the capacity current of arc furnace reactive power compensator 5 on the self coupling winding 3 that this increases newly, flow through the resistive and inductance current that the current in resistance property of arc furnace electrode and the soft lead-in wire of arc furnace, the horizontal sliver of arc furnace electrode, arc furnace electrode etc. consume on the former secondary winding 2 of arc furnace transformer low-pressure side.Like this at the secondary leading-out terminal a of arc furnace transformer low-pressure side, b, c, the capacity current of the reactive power compensator 5 that each is gone up mutually can compensate the inductance current that arc furnace consumes fully, make the electric current that flows through on the former secondary winding 2 of arc furnace transformer low-pressure side only be the current in resistance property that arc furnace consumed, thereby the electric current of arc furnace transformer low-pressure side secondary winding 2 can be reduced greatly.Equally, also only flow through the current in resistance property of arc furnaces consume on the elementary winding 1 in arc furnace transformer high-pressure side.
According to above-described Compensating gear reactive power of electric arc furnace, detailed technical characterstic has: described arc furnace reactive power compensator 5 can phase-splitting be connected on respectively on leading-out terminal b, c, a of leading-out terminal a ', b ', c ' and the former secondary winding 2 of arc furnace transformer low-pressure side of the secondary self coupling winding 3 of arc furnace transformer low-pressure side, be that the arc furnace reactive power compensator 5 that a goes up mutually is connected on leading-out terminal a ', the b, the arc furnace reactive power compensator 5 that b goes up mutually is connected on leading-out terminal b ', the c, and the arc furnace reactive power compensator 5 that c goes up mutually is connected on leading-out terminal c ', a.
According to above-described Compensating gear reactive power of electric arc furnace, detailed technical characterstic has: described arc furnace reactive power compensator 5 can be connected into the Δ type, and three terminals of Δ are connected on respectively on leading-out terminal a ', b ', the c ' of the secondary self coupling winding 3 of arc furnace transformer low-pressure side.
According to above-described Compensating gear reactive power of electric arc furnace, detailed technical characterstic has: described arc furnace reactive power compensator 5 can be connected into Y
0Type, Y
0Three terminals be connected on leading-out terminal a ', b ', the c ' of the secondary self coupling winding 3 of arc furnace transformer low-pressure side Y respectively
0Ground connection at zero point.
According to above-described Compensating gear reactive power of electric arc furnace, detailed technical characterstic has: the capacity that the voltage of the secondary self coupling winding 3 of described arc furnace transformer low-pressure side and capacity depend on arc furnace reactive power compensator 5.
According to above-described Compensating gear reactive power of electric arc furnace, detailed technical characterstic has: the reactive power controller 8 of described Compensating gear reactive power of electric arc furnace is located on the monitoring point, porch, arc furnace transformer high-pressure side.So excitatory reactive loss Q of arc furnace transformer
0With short circuit reactive loss Q
KCan provide and do not need system to supply with by arc furnace reactive power compensator 5.That is to say that Compensating gear reactive power of electric arc furnace can compensate all upstream reactance of seeing to system from arc furnace transformer low-voltage side outlet end a, b, c, and pilot arc furnace transformer low-voltage side outlet end a, b, c three point voltages are constant substantially.
The advantage of Compensating gear reactive power of electric arc furnace of the present invention is a lot: 1. the part winding of the secondary self coupling winding of arc furnace transformer low-pressure side is the former secondary winding of arc furnace transformer low-pressure side, but the electric current that flows through the self coupling winding is a capacity current can compensate the inductance current in the former arc furnace transformer, former arc furnace transformer low-pressure side secondary winding electric current is reduced, and this self coupling winding that promptly increases newly does not take the former secondary winding capacity of arc furnace transformer low-pressure side; 2. though increased reactive power compensation device newly, not only do not increase the capacity and the electric current of former elementary, the secondary winding of arc furnace transformer, make on the contrary and formerly flow through that arc furnace transformer is elementary, the perceptual reactive current of secondary winding is compensated, make former elementary, the secondary winding of arc furnace transformer only flow through the resistive electric current of the real acting of arc furnace, the economic benefit of arc furnace transformer operation is improved greatly; 3. this Compensating gear reactive power of electric arc furnace can not only compensate the lagging reactive power that the soft lead-in wire of arc furnace, electrode and horizontal sliver thereof consume, and can also compensate the excitatory reactive power Q of arc furnace transformer itself
0With the short circuit reactive power Q
KCan compensate all upstream reactance of seeing to system from arc furnace transformer low-voltage side outlet end a, b, c, basic pilot arc furnace transformer low-voltage side outlet end a, b, c point voltage are constant, the total reactance of arc furnace electric power system from electrode to the system voltage invariant point significantly reduced, an only remaining soft company go between reactance, electrode and laterally sliver reactance thereof.Like this, at identical arc voltage U
ArcCan make arc furnace maximum power P under the situation
MaxIncrease substantially, perhaps at P
MaxUnder the constant situation, make U
ArcReduce greatly, operation is very favourable to arc furnace like this; 4. the secondary self coupling winding of arc furnace transformer low-pressure side can solve big electric current and high voltage problem well.The voltage of the secondary self coupling winding of arc furnace transformer low-pressure side and capacity depend on the capacity of arc furnace reactive power compensator, can determine a suitable scope according to the reactive power of arc furnace needs compensation.So no matter the capacity of electric arc furnace size can be implemented reactive power dynamic compensation in very economical ground.The arc furnace that Compensating gear reactive power of electric arc furnace of the present invention can be used for various capacity needs the place of reactive power compensation, and this structural principle also can be used in all occasions that secondary side voltage is low, electric current is big such as rectification change.
Four. description of drawings
The accompanying drawing of Compensating gear reactive power of electric arc furnace of the present invention has five width of cloth.Wherein:
Fig. 1 is the arc furnace transformer elementary diagram;
Fig. 2 is the self coupling winding connection schematic diagram of the secondary increase of arc furnace transformer low-pressure side;
Fig. 3 is that arc furnace is gone up the reactive power compensation device elementary diagram mutually;
Fig. 4 is a Compensating gear reactive power of electric arc furnace Δ type elementary diagram;
Fig. 5 is Compensating gear reactive power of electric arc furnace Y
0The type elementary diagram;
In each figure: 1. the elementary winding in arc furnace transformer high-pressure side; 2. arc furnace transformer low-pressure side secondary winding; 3. the secondary self coupling winding of arc furnace transformer low-pressure side; 4. arc furnace; 5. arc furnace reactive power compensator; 6. current transformer; 7. voltage transformer; 8. reactive power controller; 9. soft lead-in wire.Below in conjunction with each embodiment each accompanying drawing is described further.
Five. embodiment
Embodiment one. Compensating gear reactive power of electric arc furnace
The Compensating gear reactive power of electric arc furnace that this is routine, its concrete structure is illustrated by Fig. 3, shown in this example be used for arc furnace 4 go up reactive power compensation device mutually, this device comprises the elementary winding 1 of transformer high-voltage side, low-pressure side secondary winding 2, arc furnace reactive power compensator 5, current transformer 6, voltage transformer 7 and reactive power controller 8 particularly including the secondary self coupling winding 3 of arc furnace transformer low-pressure side, assemble jointly and form.The secondary self coupling winding 3 of arc furnace transformer low-pressure side constitutes by vertically increasing the part winding on the former secondary winding 2 of arc furnace transformer low-pressure side.The voltage of the secondary self coupling winding 3 of arc furnace transformer low-pressure side and capacity depend on the capacity of arc furnace reactive power compensator 5, can design according to the capacity of the reactive power compensator 5 of arc furnace 4.The reactive power compensator 5 that arc furnace a, b, c go up mutually, phase-splitting is connected on respectively on leading-out terminal b, c, a of the secondary self coupling winding 3 leading-out terminal a ' of arc furnace transformer low-pressure side, b ', c ' and the former secondary winding 2 of arc furnace transformer low-pressure side, be that the arc furnace reactive power compensator 5 that a goes up mutually is connected on leading-out terminal a ', the b, the arc furnace reactive power compensator 5 that b goes up mutually is connected on leading-out terminal b ', the c, and the arc furnace reactive power compensator 5 that c goes up mutually is connected on leading-out terminal c ', a.The capacity of the reactive power compensator 5 of arc furnace 4 can need the reactive power of compensation to design by arc furnace 4, the reactive power compensator 5 of arc furnace 4 can be voltage-type SVC, they can be with existing known technology, according to the reactive power compensator 5 Capacity design realization of arc furnace 4 needs.Reactive power controller 8 should be located on the monitoring point, porch, arc furnace transformer high-pressure side.The reactive power that arc furnace reactive power compensator 5 sends is subjected to the control of reactive power controller 8, and reactive power controller 8 is monitoring arc furnace 4 operating reactive power consumption and reactive power equilibrium in real time.Reactive power controller 8, current transformer 6, voltage transformer 7 all can use according to the reactive power compensator 5 needs matching Design or the purchase of arc furnace 4 according to existing known technology.Embodiment two. Compensating gear reactive power of electric arc furnace
The Compensating gear reactive power of electric arc furnace that this is routine, its concrete structure is illustrated by Fig. 4, the reactive power compensator 5 that this example arc furnace 4 is gone up mutually can be connected into the Δ type, and three terminals of Δ are connected on respectively on leading-out terminal a ', b ', the c ' of the secondary self coupling winding 3 of arc furnace transformer low-pressure side.What all the other were not stated is same as described in the embodiment one entirely, no longer having stated more
Embodiment three. Compensating gear reactive power of electric arc furnace
This routine Compensating gear reactive power of electric arc furnace concrete structure as shown in Figure 5, the reactive power compensator 5 that the arc furnace 4 in this example is gone up mutually can be connected into Y
0Type, Y
0Three terminals be connected on leading-out terminal a ', b ', the c ' of the secondary self coupling winding 3 of arc furnace transformer low-pressure side Y respectively
0Ground connection at zero point.What all the other were not stated is same as described in embodiment one and the embodiment two entirely, has no longer repeated.
Claims (7)
1. Compensating gear reactive power of electric arc furnace, this device includes the elementary winding in arc furnace transformer high-pressure side (1), low-pressure side secondary winding (2), arc furnace reactive power compensator (5), current transformer (6), voltage transformer (7) and reactive power controller (8), common function assembles and forms, and is characterised in that: this device also includes the secondary self coupling winding (3) in the arc furnace transformer low-pressure side.
2. Compensating gear reactive power of electric arc furnace according to claim 1 is characterised in that: the secondary self coupling winding (3) of described arc furnace transformer low-pressure side is gone up by the former secondary winding of arc furnace transformer low-pressure side (2) vertically increases part winding formation.
3. Compensating gear reactive power of electric arc furnace according to claim 2, be characterised in that: described arc furnace reactive power compensator (5) can phase-splitting be connected on the secondary self coupling winding of arc furnace transformer low-pressure side (3) leading-out terminal a ' respectively, b ', the leading-out terminal b of c ' and the former secondary winding of arc furnace transformer low-pressure side (2), c, on a, be that the arc furnace reactive power compensator (5) that a goes up mutually is connected on leading-out terminal a ', on the b, the arc furnace reactive power compensator (5) that b goes up mutually is connected on leading-out terminal b ', on the c, the arc furnace reactive power compensator (5) that c goes up mutually is connected on leading-out terminal c ', on a.
4. Compensating gear reactive power of electric arc furnace according to claim 2, be characterised in that: described arc furnace reactive power compensator (5) can be connected into the Δ type, and three terminals of Δ are connected on respectively on leading-out terminal a ', b ', the c ' of the secondary self coupling winding of arc furnace transformer low-pressure side (3).
5. Compensating gear reactive power of electric arc furnace according to claim 2 is characterised in that: described arc furnace reactive power compensator (5) can be connected into Y
0Type, Y
0Three terminals be connected on leading-out terminal a ', b ', the c ' of the secondary self coupling winding of arc furnace transformer low-pressure side (3) Y respectively
0Ground connection at zero point.
6. according to claim 3 or 4 or 5 described Compensating gear reactive power of electric arc furnace, be characterised in that: the voltage of the secondary self coupling winding of described arc furnace transformer low-pressure side (3) and capacity depend on the capacity of arc furnace reactive power compensator (5).
7. Compensating gear reactive power of electric arc furnace according to claim 6 is characterised in that: the reactive power controller (8) of described Compensating gear reactive power of electric arc furnace is located on the monitoring point, porch, arc furnace transformer high-pressure side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031467695A CN1259806C (en) | 2003-06-25 | 2003-06-25 | Equipment for compensating wattless power of electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031467695A CN1259806C (en) | 2003-06-25 | 2003-06-25 | Equipment for compensating wattless power of electric arc furnace |
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| Publication Number | Publication Date |
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| CN1481198A true CN1481198A (en) | 2004-03-10 |
| CN1259806C CN1259806C (en) | 2006-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031467695A Expired - Fee Related CN1259806C (en) | 2003-06-25 | 2003-06-25 | Equipment for compensating wattless power of electric arc furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394694B (en) * | 2008-10-28 | 2011-04-27 | 福建敏讯上润电气科技有限公司 | Low-voltage side voltage regulating and dynamic compensating device for electric arc furnace |
| CN102163847A (en) * | 2011-03-21 | 2011-08-24 | 山西广福工程技术有限公司 | Low-pressure reactive compensation filtering device for ore-smelting furnace |
| CN106134026A (en) * | 2014-03-31 | 2016-11-16 | 西门子公司 | For dynamically adjusting the apparatus and method of electric arc furnace |
| CN109792811A (en) * | 2016-09-15 | 2019-05-21 | 首要金属科技德国有限责任公司 | The current transformer feed-type electric arc furnaces with capacitor device in secondary circuit |
-
2003
- 2003-06-25 CN CNB031467695A patent/CN1259806C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394694B (en) * | 2008-10-28 | 2011-04-27 | 福建敏讯上润电气科技有限公司 | Low-voltage side voltage regulating and dynamic compensating device for electric arc furnace |
| CN102163847A (en) * | 2011-03-21 | 2011-08-24 | 山西广福工程技术有限公司 | Low-pressure reactive compensation filtering device for ore-smelting furnace |
| CN106134026A (en) * | 2014-03-31 | 2016-11-16 | 西门子公司 | For dynamically adjusting the apparatus and method of electric arc furnace |
| CN106134026B (en) * | 2014-03-31 | 2018-11-09 | 西门子公司 | Device and method for dynamically adjusting electric arc furnaces |
| US10716176B2 (en) | 2014-03-31 | 2020-07-14 | Siemens Aktiengesellschaft | Apparatus and method for dynamically adjusting an electric arc furnace |
| CN109792811A (en) * | 2016-09-15 | 2019-05-21 | 首要金属科技德国有限责任公司 | The current transformer feed-type electric arc furnaces with capacitor device in secondary circuit |
| US11122655B2 (en) | 2016-09-15 | 2021-09-14 | Primetals Technologies Germany Gmbh | Converter-fed electric arc furnace with capacitor assembly in the secondary circuit |
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| Publication number | Publication date |
|---|---|
| CN1259806C (en) | 2006-06-14 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuxi Xirong Electric Appliance Co., Ltd. Assignor: Chen Juncheng Contract fulfillment period: 2008.2.1 to 2023.2.1 contract change Contract record no.: 2009320000606 Denomination of invention: Equipment for compensating wattless power of electric arc furnace Granted publication date: 20060614 License type: Exclusive license Record date: 2009.4.20 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.2.1 TO 2023.2.1; CHANGE OF CONTRACT Name of requester: WUXI CITY XIRONG POWER ELECTRICAL APPLIANCES CO., Effective date: 20090420 |
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Granted publication date: 20060614 |