CN201956696U - Dynamic zero-voltage capacitor switching switch of submerged arc furnace - Google Patents
Dynamic zero-voltage capacitor switching switch of submerged arc furnace Download PDFInfo
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- CN201956696U CN201956696U CN2011200525571U CN201120052557U CN201956696U CN 201956696 U CN201956696 U CN 201956696U CN 2011200525571 U CN2011200525571 U CN 2011200525571U CN 201120052557 U CN201120052557 U CN 201120052557U CN 201956696 U CN201956696 U CN 201956696U
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- voltage
- thyristor
- switching
- zero
- switching switch
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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 utility model discloses a dynamic zero-voltage capacitor switching switch of a submerged arc furnace, comprising a switching circuit and a control circuit; the switching circuit comprises a thyristor which is connected in series with a capacitor and an inductor after being antiparallel with a diode, and the switching switch is also connected in parallel with a vacuum contactor; the control circuit comprises a photoelectric coupler, a zero-voltage detector, a control chip and a trigger circuit, wherein a voltage dropping resistor is connected in series between the photoelectric coupler and the thyristor, the output end of the zero-voltage detector is connected with the input end of the control chip, and the output end of the trigger circuit is connected with the input end of the switching switch. The switching switch provided by the utility model has low power consumption due to pull-in by adopting the vacuum contactor after the switch is connected and high reliability due to the avoidance of pollution of generated harmonic waves on a power grid.
Description
Technical field
The utility model relates to the control panel of a kind of metallurgy industry mine heat furnace smelting system, relates in particular to the dynamic no-voltage capacitor switching of the hot stove in a kind of ore deposit switch.
Background technology
At present, because himself production characteristics of the hot stove in ore deposit need the condenser capacity of compensation big, big by the electric current of fling-cut switch, the fling-cut switch that adopts mainly contains three kinds usually:
1: common contactor switching mode;
Adopt the hot stove compensation arrangement in low pressure ore deposit of common contactor switching, often adopt three contact parallel connections of contactor to make to be used for to enlarge and use electric current, such use: often because the inconsistency of three contacts of contactor deciliter causes contacts of contactor often to burn out.
2: the vacuum contactor switching mode;
Use the ore furnace low-pressure filtering compensation device of vacuum contactor switching, this apparatus features is: each loop switched capacitor capacity is big, is applicable to frequent switching.But vacuum contactor can not be according to the fast dynamic switching of load variations.
3: the dynamic switching mode of thyristor;
Adopt the hot stove compensation arrangement in low pressure ore deposit of thuristor throw-in and throw-off: the self-heating power consumption of thyristor greatly, not energy-conservation.Thyristor produces high order harmonic component, and thyristor is difficult to detect real point of zero voltage when the occasion work that harmonic wave is arranged.The result who produces is: thyristor impacts connecting and disconnecting down through the big electric current of being everlasting, high voltage, and thyristor often burns.
The utility model content
The purpose of this utility model is to provide the dynamic no-voltage capacitor switching of the hot stove in a kind of ore deposit switch, and it has the reliability height, the characteristics of good energy saving property.
The purpose of this utility model is to be achieved through the following technical solutions:
The dynamic no-voltage capacitor switching of the hot stove in a kind of ore deposit switch, it comprises switching circuit and control circuit, wherein, described switching circuit comprises thyristor, behind the described thyristor inverse parallel diode with electric capacity, the inductance series connection, and described thyristor also is parallel with contactor, described control circuit comprises photoelectrical coupler, zero-voltage detector, control chip and circuits for triggering, be connected in series dropping resistor between described photoelectrical coupler and the thyristor, the output of described zero-voltage detector connects the input of control chip, and the output of described circuits for triggering connects the input of switching circuit.
Especially, described contactor is a vacuum contactor.
The beneficial effects of the utility model are, the dynamic no-voltage capacitor switching of the hot stove in described ore deposit switch adopts capacitor precharge mode, utilize its precharge of diode pair before dropping into capacitor, be charged to the peak value of line voltage, when the line voltage peak value, trigger the thyristor connecting and disconnecting, the vacuum contactor adhesive is adopted in not only low-power consumption behind the switch connection; And the reliability height, avoided because of producing the pollution that harmonic wave causes electrical network.
Description of drawings
With embodiment the utility model is described in further detail with reference to the accompanying drawings below.
Fig. 1 is the theory diagram of the dynamic no-voltage capacitor switching of the hot stove in the utility model ore deposit switch;
Fig. 2 is the switching circuit diagram of the dynamic no-voltage capacitor switching of the hot stove in the utility model ore deposit switch.
Among the figure:
1, switching circuit; 2, control circuit; 3, photoelectrical coupler; 4, zero-voltage detector; 5, control chip; 6, circuits for triggering.
Embodiment
Please refer to Figure 1 and Figure 2, Fig. 1 is the theory diagram of the dynamic no-voltage capacitor switching of the hot stove in the utility model ore deposit switch; Fig. 2 is the switching circuit diagram of the dynamic no-voltage capacitor switching of the hot stove in the utility model ore deposit switch.
The dynamic no-voltage capacitor switching of the hot stove in a kind of ore deposit switch, it comprises switching circuit 1 and control circuit 2, between described switching circuit 1 and the electrical network fast acting fuse R1 is set, described switching circuit 1 comprises thyristor V, behind the described thyristor V inverse parallel diode D with capacitor C, the inductance L series connection, and described thyristor V also is parallel with vacuum contactor K, described control circuit 2 comprises photoelectrical coupler 3, zero-voltage detector 4, control chip 5 and circuits for triggering 6, be connected in series dropping resistor R between described photoelectrical coupler 3 and the thyristor V, the output of described zero-voltage detector 4 connects the input of control chip 5, the output of described control chip 5 connects the input of control chip 5, the input of described control chip 5 connects the input of circuits for triggering 6, and the output of described circuits for triggering 6 connects the input of switching circuit 1.
The main circuit of switching circuit 1 adopts thyristor V and diode D inverse parallel mode, its voltage was always maintained at the peak value of line voltage before capacitor C dropped into, in case capacitor C voltage ratio line voltage peak value decreases, diode D can be with its voltage charging to the electrical network crest voltage, as long as when the line voltage peak value, trigger thyristor V, just can avoid the impact of electric current.
Because the uncertainty of capacitor C residual voltage, voltage on the thyristor V is the value that can not calculate according to line voltage, but can determine whether line voltage equates with the capacitor residual voltage by the voltage that detects thyristor V two ends (anode and negative electrode), trigger thyristor V when thyristor V both end voltage equates (voltage difference is zero) when detecting.Described thyristor V both end voltage is delivered to photoelectrical coupler 3 through dropping resistor R step-down, thyristor V both end voltage is zero when the alternating voltage instantaneous value equates with capacitor C residual voltage, control chip 5 is given in pulse of no-voltage testing circuit 4 outputs, these control chip 5 start triggering circuits 6 remove to trigger corresponding thyristor.
The dynamic no-voltage capacitor switching of the hot stove in described ore deposit switch has following characteristics:
1) thyristor two ends no-voltage (being that both end voltage equates) drops into, and the current over-zero excision does not produce overvoltage.
2) switch connection final vacuum contactor adhesive, low-power consumption need not outer radiation fin.
3) do not produce harmonic wave, do not pollute electrical network.
4) follow load variations dynamic high speed switching, reliability height, energy saving height.
5) has the integrated protection function: defencive functions such as input voltage open-phase protection, overvoltage protection, under-voltage protection.
Claims (2)
1. the dynamic no-voltage capacitor switching of the hot stove in ore deposit switch, it comprises switching circuit and control circuit, it is characterized in that: described switching circuit comprises thyristor, behind the described thyristor inverse parallel diode with electric capacity, the inductance series connection, and described thyristor also is parallel with contactor, described control circuit comprises photoelectrical coupler, zero-voltage detector, control chip and circuits for triggering, be connected in series dropping resistor between described photoelectrical coupler and the thyristor, the output of described zero-voltage detector connects the input of control chip, and the output of described circuits for triggering connects the input of switching circuit.
2. the dynamic no-voltage capacitor switching of the hot stove in ore deposit according to claim 1 switch; It is characterized in that: described contactor is a vacuum contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200525571U CN201956696U (en) | 2011-03-02 | 2011-03-02 | Dynamic zero-voltage capacitor switching switch of submerged arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200525571U CN201956696U (en) | 2011-03-02 | 2011-03-02 | Dynamic zero-voltage capacitor switching switch of submerged arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201956696U true CN201956696U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200525571U Expired - Fee Related CN201956696U (en) | 2011-03-02 | 2011-03-02 | Dynamic zero-voltage capacitor switching switch of submerged arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201956696U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709886A (en) * | 2012-06-08 | 2012-10-03 | 湖北三环发展股份有限公司 | Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set |
| CN105680456A (en) * | 2016-03-22 | 2016-06-15 | 广州开能电气实业有限公司 | Capacitor zero-crossing switching module |
-
2011
- 2011-03-02 CN CN2011200525571U patent/CN201956696U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709886A (en) * | 2012-06-08 | 2012-10-03 | 湖北三环发展股份有限公司 | Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set |
| CN102709886B (en) * | 2012-06-08 | 2014-08-06 | 湖北三环发展股份有限公司 | Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set |
| CN105680456A (en) * | 2016-03-22 | 2016-06-15 | 广州开能电气实业有限公司 | Capacitor zero-crossing switching module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20140302 |