CN101572412A - High-capacity packet type switchgear - Google Patents
High-capacity packet type switchgear Download PDFInfo
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- CN101572412A CN101572412A CNA2009101479775A CN200910147977A CN101572412A CN 101572412 A CN101572412 A CN 101572412A CN A2009101479775 A CNA2009101479775 A CN A2009101479775A CN 200910147977 A CN200910147977 A CN 200910147977A CN 101572412 A CN101572412 A CN 101572412A
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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 discloses a high-capacity packet type switchgear. The switchgear consists of a high-capacity thyristor with current up to 150-1200A, a high-capacity diode and a high-capacity contactor which are connected in parallel, the high-capacity thyristor and the high-capacity diode are connected in inverse parallel; the switchgear is controlled by a switch controller which is thrown in the thyristor and the contactor when voltage of the capacitor equals to the mains voltage; the contactor is switched off first and then the thyristor is switched off. The switchgear solves the problems of rush current and overvoltage when a idle comprehensive control device is switched on and high consumption in operation, and the switchgear has convenient operation and reliable running.
Description
Technical field
The present invention relates to the big combined capacity formula switch in the hot stove harmonic wave reactive comprehensive controlling device of a kind of ore deposit, is harmonic wave control and the reactive power compensation that is mainly used in the hot stove in ore deposit.
Background technology
The switch that uses in the prior art, general only with contactor or two antiparallel thyristors etc., (application number: 200710018168.5), its theory diagram as shown in Figure 1 for example in the prior art, only use contactor to carry out switching, this control mode falls behind.Traditional contactor switched capacitor, because of inrush phenomenon is big, the switching overvoltage height makes that probe of contactor burns, capacitor breakdown causes damaging, and useful life is short, and maintenance workload is big, and coefficient of safety is low, and left and right sides compensation arrangement will be scrapped in general 1 year.If only use thyristor switchable capacitor, then the thyristor heating loss is bigger, influences the energy-saving effect of complete equipment.Especially capacitance current is up to amperes up to ten thousand in the hot stove compensation in ore deposit, and the thyristor heating is very big, and loss is serious.
The similar resistance furnace of the hot stove in ore deposit, the main essential industry raw materials such as calcium carbide, yellow phosphorus, silicon, ferromanganese, ferrochrome, ferro-tungsten of producing, its work characteristics is to adopt carbonaceous or magnesia refractories to make furnace lining, use from training electrode, alternating current is led in people's stove by three electrodes respectively, electric current produces electric arc through electrode and interelectrode furnace charge in the electrode lower end, add furnace charge generation chemical reaction generation all cpds such as ferrosilicon, calcium carbide, monocrystalline silicon etc. under the high temperature action of electric arc.Electrode inserts furnace charge and carries out arc-covering slag operation, utilizes the energy of electric arc and electric current to pass through furnace charge, and because of the resistance produce power of furnace charge is come smelting metal, reinforced successively, batch (-type) goes out scum, is the huge industrial furnace of a kind of power consumption of working continuously.
Design feature and work characteristics according to the hot stove in ore deposit, 70% of the system reactance of the hot stove in ore deposit is produced by short net system, and short net is the system of a big current work, maximum current can reach amperes up to ten thousand, therefore the performance of short net has determined the performance of the hot stove in ore deposit, just because of this reason, therefore the natural power factor of the hot stove in ore deposit is difficult to reach more than 0.85, the natural power factor of most stoves is all between 0.7～0.8, lower power factor not only makes the decrease in efficiency of transformer, consume a large amount of idle works, moreover, during the hot stove in some ore deposit (as industrial silicon furnace) work, because electric arc time-delay arcing, factors such as the non-linear and electric arc of arc resistance moves about, it is very irregular to make that arc current changes.Make that not only numerical value takes place to distort the electric furnace electric current and significantly pulsation, but also produce a large amount of harmonic waves, especially bigger with 3,5,7 content, as this not being limited and absorbing,, all can produce adverse influence no matter to smelting equipment or compensation arrangement.Power department also will be added extra electric power fine to the low user of power factor.Therefore improve the power factor of short net, administer harmonic pollution, reduce grid loss and just become energy-conservation of consumption reduction, improve the effective means of smelting efficient.
In sum, the deficiencies in the prior art part following points:
(1) control mode falls behind.Traditional contactor switched capacitor, because of inrush phenomenon is big, the switching overvoltage height makes that probe of contactor burns, capacitor breakdown causes damaging, and useful life is short, and maintenance workload is big, and coefficient of safety is low, and left and right sides compensation arrangement will be scrapped in general 1 year.
(2) design experiences lacks.By incoherent enterprise of the hot stove in ore deposit or switch cubicle manufacturer production, they were not enough to the particularity understanding of compensation arrangement in the past, and equipment does not have supporting series reactor, can not effectively suppress harmonic wave, moreover the protection imperfection, causes the device damage rate too high.
(3) because the contactor capacity of taking is less, and electric current generally is lower than 150 amperes, and every condenser capacity is organized number up to 200 groups at 6～7KVA, and failure rate is very high.
Summary of the invention
Big in order to prevent to occur in the making process shoving, switching overvoltage is too high and cause burning problems such as probe of contactor, breakdown potential container, the invention provides a kind of big combined capacity formula switchgear, this equipment can be composed in parallel up to the big capacity thyristor of 150～1200A, big capacity diode and big capacity contactor by electric current, and wherein big capacity thyristor adopts antiparallel mode to be connected with big capacity diode; This equipment is controlled by on-off controller, and on-off controller drops into thyristor and contactor when condenser voltage is equal with line voltage; Excise contactor during excision earlier, excise thyristor again.This has solved when making this big combined capacity formula switchgear switching and has shoved and superpotential problem, has solved the problem of high loss during operation, and is easy to operate during use, reliable.
This high-capacity packet type switchgear and a capacitors in series are formed a kind of compensating module, and following several connected mode can be arranged: two these compensating modules are in parallel with a capacitor, wherein any side short circuit together, opposite side is connected into electrical network; Or three these compensating modules connect from beginning to end; Or two ends in three capacitors that connect with loop type connect this high-capacity packet type switchgear respectively.
This high-capacity packet type switchgear is controlled by on-off controller, and on-off controller drops into thyristor and contactor when condenser voltage is equal with line voltage; Excise contactor during excision earlier, excise thyristor again.
Filter compensation arrangement, reactive power compensator and reactive controller (not shown in figures) are formed the reactive comprehensive controlling device; Wherein, reactive controller is gathered the on off state data of high side voltage, electric current and low-pressure side voltage and each contactor, on-off controller according to all control thyristors of the Data Control of gathering and contactor, realize idle adjusting, this reactive comprehensive controlling device carries dust guard, be the automated system of a full-closed structure, complete machine adopts box installation.
Wherein, reactive power compensator adopts the compensation of first in first out endless form; The filter compensation arrangement adopts the compensation of first-in last-out stack formula, and the reactor that its series reactance rate is fit to is used to satisfy the minimum reactive requirement amount of the hot stove perception in ore deposit, suppresses to absorb the harmonic current that produces when the hot furnaceman in ore deposit does.Reactive power compensator and filter compensation arrangement are installed in parallel the hot stove short-net side in the ore deposit, so that reactive current is directly through loop that secondary capacitor or electric arc form and no longer through short net, transformer and power supply network before the compensation point.
The present invention is according to the design feature and the work characteristics of the hot stove in ore deposit, solved the problem that power factor was low and harmonic current causes greatly when the hot furnaceman in ore deposit did, these problems comprise: 1, the load meeting absorbs a large amount of reactive powers from system during low power factor, has increased the line loss of system and the loss of transformer greatly; Power factor (PF) is low excessively, and power department also will be added extra electric power fine to it; 2, harmonic current not only causes the Transformer Winding supplementary load loss, also causes shell, outer silicon steel sheet and the heating of some securing member, and might cause the seriously overheated of part; The harmonic current that flows into capacitor can wear out by the speed-up condenser medium, causes smelting the low of efficient reduction of service life, and the electricity charge are increased.
Description of drawings
The harmonic suppression apparatus schematic diagram of Fig. 1, the hot stove in existing ore deposit
Fig. 2, ore deposit of the present invention hot stove harmonic wave reactive comprehensive controlling device schematic diagram
Fig. 3, compensating module schematic diagram
Fig. 4, compensating module connected mode 1
Fig. 5, compensating module connected mode 2
Fig. 6, compensating module connected mode 3
Embodiment
Ore deposit hot stove harmonic wave reactive comprehensive smelting reason device adopts 630 amperes big combined capacity formula switches, and diode plays the purpose to the capacitor charging, for next step switching creates conditions; On-off controller drops into thyristor and contactor when condenser voltage is equal with line voltage, this moment dv/dt=0, electric current is in zero crossing I=0, thyristor and contactor drop into simultaneously during input, utilize the contactor input slow, the characteristics that the thyristor input is fast, realize that thyristor drops into prior to contactor 20ms～40ms, contactor drops into subsequently, does not excise thyristor this moment, and electric current is not just flowed through thyristor like this, and the contactor of only flowing through, can effectively reduce the loss of thyristor, also solve the transient state that drops into moment simultaneously and impacted problems such as inrush phenomenon; Excise contactor during excision earlier, excise thyristor again, overvoltage problem in the time of can effectively preventing to excise like this.This overlaps big combined capacity formula switch and has solved shoving and the electric problem of mistake when dropping into effectively, has prevented burning and capacitor damage problem of probe of contactor, has realized the purpose of the highly reliable operation and the low-loss operation of device.This overlaps jumbo packet type switch frequent switching capacitor group and do not influence switch and life of capacitors continuously.
As shown in Figure 2, the hot stove harmonic wave in ore deposit reactive comprehensive controlling device mainly is made up of filter compensation arrangement (1) and reactive power compensator (2) two parts.
According to the idle variation of system, the filter compensation arrangement adopts the compensation of " first-in last-out " stacking-type, and reactive power compensator adopts " first in first out " circulating compensation.Two parts are installed in parallel the hot stove short-net side in the ore deposit, a large amount of reactive currents is with direct loop stream mistake through secondary capacitor and electric arc formation, and no longer through short net, transformer and power supply network before the compensation point, when improving power factor, can carry out harmonic wave control, improve the meritorious output rating of transformer, reduce the reactive power consumption of transformer, short net, improved the meritorious of transformer and exerted oneself.
Transformer will increase to the power of burner hearth input, under appropriate compensation way, can improve simultaneously the three-phase imbalance situation that the short network arrangements of the three characteristics of the middle term causes, thereby make the power center of electric furnace, heating power center and burner hearth center overlap, the electric furnace crucible enlarges, and heat distribution is reasonable, thereby improves reaction condition, improve output, quality, reduce unit power consumption, consumption of raw materials.
The reactor that filter compensation arrangement series reactance rate is fit to suppresses to absorb the harmonic current that produces when the hot furnaceman in ore deposit does, and improves the quality of power supply of short-net side; Reactive power compensator makes the hot stove in ore deposit always work in optimal operational condition to the reactive power compensation of short net fast implementation quick-action attitude.
Reactive power compensator, filter compensation arrangement and reactive controller (not shown in figures) are formed the reactive comprehensive controlling device; Wherein, reactive controller is gathered the on off state data of high side voltage, electric current and low-pressure side voltage and each contactor, on-off controller according to all control thyristors of the Data Control of gathering and contactor, realize idle adjusting, this reactive comprehensive controlling device carries dust guard, be the automated system of a full-closed structure, complete machine adopts box installation.
The above only is a preferred implementation of the present invention; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1, a kind of big combined capacity formula switchgear is characterized in that,
This equipment is composed in parallel by big capacity thyristor, big capacity contactor, big capacity diode, and wherein big capacity thyristor adopts antiparallel mode to be connected with big capacity diode;
This equipment is controlled by on-off controller, and on-off controller drops into thyristor and contactor when condenser voltage is equal with line voltage; Excise contactor during excision earlier, excise thyristor again.
2, equipment as claimed in claim 1 is characterized in that, this big combined capacity formula switchgear and a capacitors in series are formed a kind of compensating module, and this compensating module has following several connected mode:
Two these compensating modules are in parallel with a capacitor, wherein any side short circuit together, opposite side is connected into electrical network; Or
Three these compensating modules connect from beginning to end; Or
Two ends in three capacitors that connect with loop type connect this big combined capacity formula switchgear respectively.
3, equipment as claimed in claim 1 or 2 is characterized in that,
This equipment is installed in reactive power compensator and the filter compensation arrangement,
Wherein,
Reactive power compensator adopts the circulating switching compensation of first in first out;
The filter compensation arrangement adopts the compensation of first-in last-out stack formula switching.
4, equipment as claimed in claim 3 is characterized in that,
Reactive power compensator and filter compensation arrangement are installed in parallel the hot stove short-net side in the ore deposit, the loop that secondary capacitor and electric arc form so that reactive current is directly flowed through, and no longer pass through transformer and power supply network before the compensation point.
5, equipment as claimed in claim 3 is characterized in that,
The reactor that filter compensation arrangement series reactance rate is fit to is used to satisfy the minimum reactive requirement amount of the hot stove perception in ore deposit, suppresses to absorb the harmonic current that produces when the hot furnaceman in ore deposit does.
6, as the arbitrary described equipment of claim 1-5, it is characterized in that,
Reactive power compensator, filter compensation arrangement and reactive controller are formed the reactive comprehensive controlling device;
Wherein,
Reactive controller is gathered the on off state data of high side voltage, electric current and low-pressure side voltage and each contactor, according to the on-off controller of all control thyristors of the Data Control of gathering and contactor, realizes idle adjusting;
This reactive comprehensive controlling device carries dust guard, is the automated system of a full-closed structure, and complete machine adopts box installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101479775A CN101572412A (en) | 2009-06-12 | 2009-06-12 | High-capacity packet type switchgear |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009101479775A CN101572412A (en) | 2009-06-12 | 2009-06-12 | High-capacity packet type switchgear |
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| CN101572412A true CN101572412A (en) | 2009-11-04 |
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| CNA2009101479775A Pending CN101572412A (en) | 2009-06-12 | 2009-06-12 | High-capacity packet type switchgear |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944744A (en) * | 2010-09-29 | 2011-01-12 | 金坛金凯成套电控设备有限公司 | Filter compensation device of monocrystalline silicon furnace power supply |
| CN102510067A (en) * | 2011-11-02 | 2012-06-20 | 西安交通大学 | Method for preventing thyristors from being locked during quick and repeated zero cross switching of three-phase thyristor switched capacitor (TSC) |
| CN102709914A (en) * | 2012-07-09 | 2012-10-03 | 上海稳利达科技股份有限公司 | Filtering and reactive power compensation controller and compensation control method for power system |
| CN102738783A (en) * | 2012-06-27 | 2012-10-17 | 昌华电气设备集团有限公司 | Connecting circuit for absorbing power grid overvoltage by utilizing capacitors of reactive compensation devices |
| CN103606923A (en) * | 2013-11-11 | 2014-02-26 | 董先庆 | Intermediate frequency furnace harmonic wave treatment and reactive power compensation apparatus |
| CN104333018A (en) * | 2014-11-23 | 2015-02-04 | 临沂施乃通电气技术有限公司 | Low voltage reactive compensation combination switch device |
| CN106655215A (en) * | 2017-01-18 | 2017-05-10 | 国网江苏省电力公司电力科学研究院 | Reactive power compensation equipment switch optimization method based on double-queue method for source network load |
| CN112152215A (en) * | 2019-06-28 | 2020-12-29 | 北京金风科创风电设备有限公司 | Filter capacitor operation control device and method of converter |
-
2009
- 2009-06-12 CN CNA2009101479775A patent/CN101572412A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944744B (en) * | 2010-09-29 | 2013-05-29 | 金坛金凯成套电控设备有限公司 | Filter compensation device of monocrystalline silicon furnace power supply |
| CN101944744A (en) * | 2010-09-29 | 2011-01-12 | 金坛金凯成套电控设备有限公司 | Filter compensation device of monocrystalline silicon furnace power supply |
| CN102510067A (en) * | 2011-11-02 | 2012-06-20 | 西安交通大学 | Method for preventing thyristors from being locked during quick and repeated zero cross switching of three-phase thyristor switched capacitor (TSC) |
| CN102510067B (en) * | 2011-11-02 | 2014-03-12 | 西安交通大学 | Method for preventing thyristors from being locked during quick and repeated zero cross switching of three-phase thyristor switched capacitor (TSC) |
| CN102738783A (en) * | 2012-06-27 | 2012-10-17 | 昌华电气设备集团有限公司 | Connecting circuit for absorbing power grid overvoltage by utilizing capacitors of reactive compensation devices |
| CN102738783B (en) * | 2012-06-27 | 2014-12-17 | 昌华电气设备集团有限公司 | Connecting circuit for absorbing power grid overvoltage by utilizing capacitors of reactive compensation devices |
| CN102709914A (en) * | 2012-07-09 | 2012-10-03 | 上海稳利达科技股份有限公司 | Filtering and reactive power compensation controller and compensation control method for power system |
| CN102709914B (en) * | 2012-07-09 | 2015-03-04 | 上海稳利达科技股份有限公司 | Filtering and reactive power compensation controller and compensation control method for power system |
| CN103606923A (en) * | 2013-11-11 | 2014-02-26 | 董先庆 | Intermediate frequency furnace harmonic wave treatment and reactive power compensation apparatus |
| CN104333018A (en) * | 2014-11-23 | 2015-02-04 | 临沂施乃通电气技术有限公司 | Low voltage reactive compensation combination switch device |
| CN106655215A (en) * | 2017-01-18 | 2017-05-10 | 国网江苏省电力公司电力科学研究院 | Reactive power compensation equipment switch optimization method based on double-queue method for source network load |
| CN112152215A (en) * | 2019-06-28 | 2020-12-29 | 北京金风科创风电设备有限公司 | Filter capacitor operation control device and method of converter |
| CN112152215B (en) * | 2019-06-28 | 2024-05-17 | 北京金风科创风电设备有限公司 | Filter capacitor operation control device and method of converter |
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Open date: 20091104 |