CN102130449A - Direct current bus quick discharge circuit of explosion-proof converter - Google Patents
Direct current bus quick discharge circuit of explosion-proof converter Download PDFInfo
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- CN102130449A CN102130449A CN2011100637533A CN201110063753A CN102130449A CN 102130449 A CN102130449 A CN 102130449A CN 2011100637533 A CN2011100637533 A CN 2011100637533A CN 201110063753 A CN201110063753 A CN 201110063753A CN 102130449 A CN102130449 A CN 102130449A
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- explosion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to a direct current bus quick discharge circuit of an explosion-proof converter. The circuit comprises a control power supply, a controllable switch type device, a power discharge resistor and an RCD (Residual Current Device) resistance-capacitance absorbing loop, wherein the control power supply is connected with the control end of the controllable switch type device; the power discharge resistor is connected in series with a contact switch of the controllable switch type device and then is connected to the positive end and the negative end of a direct current bus pole plate which is required to be discharged and comprises a high capacitance support; and the RCD resistance-capacitance absorbing loop is connected in parallel to two ends of the contact switch of the controllable switch type device. After a system is powered down, on and off of the contact switch of the controllable switch type device are controlled by controlling power-on and power-down of the control end of the controllable switch type device, so that quick discharge of a direct current bus capacitor is realized. The circuit has the advantages that energy stored by the direct current bus capacitor can be quickly reduced to below 0.2mJ in 15 minutes; the system has high working stability, reliability and safety; the maintenance efficiency and the repair efficiency of the system are increased; the volume of the equipment is reduced; and the system cost is reduced.
Description
Technical field
Direct current needs discharge technology field, explosion-proof current transformer dc bus quick discharging circuit after the present invention relates to device powers down.
Background technology
After traditional explosion-proof current transformer outage is to realize the DC bus-bar voltage discharge by the low-resistance loop on grading resistor or the auxiliary electrical source plate, because the impedance of this discharge loop is bigger, so discharge time can be very long, often influence the preventive maintenance time of equipment, can not satisfy field requirement.And because this resistance is to be attempted by the dc bus two ends always, so this resistance volume is bigger, caloric value is bigger, makes troubles for the installation and the heat radiation aspect of system, particularly under the subsurface environment of colliery, equipment need be low to moderate the energy stored in the equipment below the 0.2mJ in 15 minutes.
Summary of the invention
The objective of the invention is some shortcomings such as slow at existing explosion-proof current transformer discharge, that the discharge resistance performance number is big, caloric value is big, volume is big, a kind of explosion-proof current transformer dc bus quick discharging circuit is provided, the mode of employing outage switching discharge resistance realizes the repid discharge of dc bus, utilize resistance to have the characteristics of very strong short-time overload capacity, can select for use power less, volume is less, the discharge resistance that resistance is less makes system have higher job stability and reliability, fail safe; Strengthen the maintenance and the maintenance efficiency of system, reduced the volume of equipment, reduced system cost.
For achieving the above object, the present invention is achieved through the following technical solutions:
Explosion-proof current transformer dc bus quick discharging circuit, comprise control power supply, gate-controlled switch class device, power discharge resistance, RCD capacitance-resistance absorption circuit, the control power supply is connected with the control end of gate-controlled switch class device, power discharge resistance and the positive and negative two ends that are connected to the dc bus pole plate that contains big electric capacity support that needs discharge after the contact switch of gate-controlled switch class device connect; RCD capacitance-resistance absorption circuit is connected to the two ends of gate-controlled switch class device contacts switch.Behind the system cut-off, by the electric and dead electricity that gets of control gate-controlled switch class device control end, thus control gate-controlled switch class device contacts switch connection and disconnection, thus realize switching on and off of discharge resistance, thus realize repid discharge.
Described gate-controlled switch class device is relay, contactor or thyristor.
Compare with the DC bus-bar voltage discharge loop after the outage of traditional current transformer, advantage of the present invention is:
1) can in 15 minutes, be low to moderate below the 0.2mJ by fast that DC bus-bar voltage is stored energy.
2) have higher job stability and reliability, fail safe.
3) maintenance of enhanced system and maintenance efficiency.
4) reduce the volume of equipment, reduced system cost.
Description of drawings
Fig. 1 is the structural representation of explosion-proof current transformer dc bus quick discharging circuit.
Among the figure: the contact switch R-power discharge resistance C-electric capacity R1-resistance C1-electric capacity D1-diode 1-gate-controlled switch class device 2-of the control end K-gate-controlled switch class device of J-gate-controlled switch class device makees dc capacitor and the bus pole plate that direct current supports
Embodiment
See Fig. 1, explosion-proof current transformer dc bus quick discharging circuit comprises control power supply (comprising AC and DC), gate-controlled switch class device 1, power discharge resistance R, RCD capacitance-resistance absorption circuit.But gate-controlled switch class device 1 selective relay, contactor, thyristor etc.The control power supply is connected with the control end J of gate-controlled switch class device, power discharge resistance R and the positive and negative two ends that are connected to the dc bus pole plate that contains big capacitor C support that needs discharge after the contact switch K of gate-controlled switch class device connect.
RCD capacitance-resistance absorption circuit is made up of resistance R 1, diode D1, capacitor C 1.Resistance R 1 is connected with capacitor C 1 with after diode D1 is in parallel, is connected to the contact switch K two ends of gate-controlled switch class device, is used to absorb the electromagnetic interference of cut-offfing.
Operation principle of the present invention is: behind the system cut-off, by the break-make of the contact switch K of gate-controlled switch class device in the control loop and the repid discharge that realizes dc-link capacitance C by the power discharge resistance R.Operating voltage range is at 0V to 2KV, its major function: behind the system cut-off, realize the repid discharge of dc-link capacitance, thereby realize that the stored energy of dc-link capacitance was low to moderate below the 0.2mJ in 15 minutes.
Claims (3)
1. explosion-proof current transformer dc bus quick discharging circuit, it is characterized in that, comprise control power supply, gate-controlled switch class device, power discharge resistance, RCD capacitance-resistance absorption circuit, the control power supply is connected with the control end of gate-controlled switch class device, power discharge resistance and the positive and negative two ends that are connected to the dc bus pole plate that contains big electric capacity support that needs discharge after the contact switch of gate-controlled switch class device connect; RCD capacitance-resistance absorption circuit is connected to the two ends of gate-controlled switch class device contacts switch.
2. explosion-proof current transformer dc bus quick discharging circuit according to claim 1 is characterized in that described gate-controlled switch class device is relay, contactor or thyristor.
3. explosion-proof current transformer dc bus quick discharging circuit according to claim 1 and 2, it is characterized in that, satisfy safe coal rules regulation the discharge time of described explosion-proof current transformer dc bus quick discharging circuit, equipment was put the energy of storage capacitor to 0.2mJ in 15 minutes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100637533A CN102130449A (en) | 2011-03-16 | 2011-03-16 | Direct current bus quick discharge circuit of explosion-proof converter |
| PCT/CN2012/071509 WO2012122882A1 (en) | 2011-03-16 | 2012-02-23 | Fast discharging circuit for direct-current bus of anti-explosive converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100637533A CN102130449A (en) | 2011-03-16 | 2011-03-16 | Direct current bus quick discharge circuit of explosion-proof converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102130449A true CN102130449A (en) | 2011-07-20 |
Family
ID=44268394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100637533A Pending CN102130449A (en) | 2011-03-16 | 2011-03-16 | Direct current bus quick discharge circuit of explosion-proof converter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102130449A (en) |
| WO (1) | WO2012122882A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629753A (en) * | 2012-04-06 | 2012-08-08 | 东南电梯股份有限公司 | Externally hung capacitor discharging device special for explosion-proof elevator frequency converter |
| WO2012122882A1 (en) * | 2011-03-16 | 2012-09-20 | 辽宁荣信防爆电气技术有限公司 | Fast discharging circuit for direct-current bus of anti-explosive converter |
| CN103312127A (en) * | 2013-06-21 | 2013-09-18 | 天津华宁电子有限公司 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
| CN103444067A (en) * | 2011-04-25 | 2013-12-11 | 爱信艾达株式会社 | Discharge control circuit |
| CN114221422A (en) * | 2022-02-18 | 2022-03-22 | 宁德时代新能源科技股份有限公司 | Battery pack charging system, control method, control device, battery pack charging unit, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462612Y (en) * | 2000-12-25 | 2001-11-28 | 福州大学 | Flexible buffering converter with power feeding characteristic |
| CN101281225A (en) * | 2008-05-15 | 2008-10-08 | 国网武汉高压研究院 | Special high-tension current inductor transient characteristics tester |
| US7463473B2 (en) * | 2007-04-18 | 2008-12-09 | Honeywell International, Inc. | Resonance field discharge |
| TW201041292A (en) * | 2009-03-02 | 2010-11-16 | Ulvac Inc | Alternating current power supply for sputtering apparatus |
| CN201985522U (en) * | 2011-03-16 | 2011-09-21 | 辽宁荣信防爆电气技术有限公司 | DC bus rapid discharge circuit for anti-explosion current transformer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4843533A (en) * | 1986-01-15 | 1989-06-27 | Square D Company | Transient ride-through AC inverter |
| CN1980517B (en) * | 2005-12-02 | 2010-05-05 | 超人集团有限公司 | High-voltage residual-electricity automatic quick discharging circuit |
| CN102130449A (en) * | 2011-03-16 | 2011-07-20 | 辽宁荣信防爆电气技术有限公司 | Direct current bus quick discharge circuit of explosion-proof converter |
-
2011
- 2011-03-16 CN CN2011100637533A patent/CN102130449A/en active Pending
-
2012
- 2012-02-23 WO PCT/CN2012/071509 patent/WO2012122882A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462612Y (en) * | 2000-12-25 | 2001-11-28 | 福州大学 | Flexible buffering converter with power feeding characteristic |
| US7463473B2 (en) * | 2007-04-18 | 2008-12-09 | Honeywell International, Inc. | Resonance field discharge |
| CN101281225A (en) * | 2008-05-15 | 2008-10-08 | 国网武汉高压研究院 | Special high-tension current inductor transient characteristics tester |
| TW201041292A (en) * | 2009-03-02 | 2010-11-16 | Ulvac Inc | Alternating current power supply for sputtering apparatus |
| CN201985522U (en) * | 2011-03-16 | 2011-09-21 | 辽宁荣信防爆电气技术有限公司 | DC bus rapid discharge circuit for anti-explosion current transformer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012122882A1 (en) * | 2011-03-16 | 2012-09-20 | 辽宁荣信防爆电气技术有限公司 | Fast discharging circuit for direct-current bus of anti-explosive converter |
| CN103444067A (en) * | 2011-04-25 | 2013-12-11 | 爱信艾达株式会社 | Discharge control circuit |
| CN102629753A (en) * | 2012-04-06 | 2012-08-08 | 东南电梯股份有限公司 | Externally hung capacitor discharging device special for explosion-proof elevator frequency converter |
| CN102629753B (en) * | 2012-04-06 | 2014-12-31 | 东南电梯股份有限公司 | Externally hung capacitor discharging device special for explosion-proof elevator frequency converter |
| CN103312127A (en) * | 2013-06-21 | 2013-09-18 | 天津华宁电子有限公司 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
| CN103312127B (en) * | 2013-06-21 | 2015-04-08 | 天津华宁电子有限公司 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
| CN114221422A (en) * | 2022-02-18 | 2022-03-22 | 宁德时代新能源科技股份有限公司 | Battery pack charging system, control method, control device, battery pack charging unit, and storage medium |
| CN114221422B (en) * | 2022-02-18 | 2022-07-15 | 宁德时代新能源科技股份有限公司 | Battery pack charging system, control method, control device, battery pack charging unit, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012122882A1 (en) | 2012-09-20 |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110720 |