CN201750204U - Direct current double-power-supply intelligent switching device - Google Patents
Direct current double-power-supply intelligent switching device Download PDFInfo
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- CN201750204U CN201750204U CN2010202653160U CN201020265316U CN201750204U CN 201750204 U CN201750204 U CN 201750204U CN 2010202653160 U CN2010202653160 U CN 2010202653160U CN 201020265316 U CN201020265316 U CN 201020265316U CN 201750204 U CN201750204 U CN 201750204U
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Abstract
The utility model discloses a direct current double-power-supply intelligent switching device, which is mainly used for double-path direct current power supply switching. The direct current double-power-supply intelligent switching device comprises a direct current power supply, a detection unit, a control unit and an auxiliary switching circuit. When one path of direct current power supply fails to cause power failure, the switching device is switched to the other path of power supply for normally supplying electricity, or when the power supply voltage of one path of direct current power supply lowers down to or exceeds the threshold voltage, the switching device is switched to the other path of power supply for normally supplying electricity, when the voltage difference of two sections of buses reaches the triggering voltage of the auxiliary switching circuit during the switching, the auxiliary switching circuit is conducted, and the two sections of buses are connected in parallel in advance so that the buses of the fault power supply can not lose the voltage, and then, the two sections of buses are conducted through a direct current contactor K3 after several milliseconds to complete the continuous switching. After the fault of the direct current power supply is eliminated or the power supply voltage of the direct current power supply recovers the normal state, the switching device is automatically switched back into the original set state, and the utility model solves the problem to reach the goal that when any path of power supply in the two power supplies has power failure, under voltage or over voltage, a load of the fault power supply can be automatically switched to the other path of normally operating power supply in zero second.
Description
Technical field
The utility model relates to direct current operative power source of substation equipment, particularly a kind of direct current double-power supply switching device.
Background technology
At present, the operating power of 220kV and above transformer station all adopts two cover DC power system, power supply system for communications duplicate supply to dispose more general by state's net requirement.It all is to finish manually by the person on duty that the two-way of DC power system switches, because operator on duty's frequency of operation is very high, person on duty's the working strength and the chance of misoperation have been strengthened virtually, can not guarantee therein that particularly free of discontinuities switches under one group of power failure situation, there is certain potential security risk in the operation of electrical network.If realized the automatic switchover of two-way DC power supply, can guarantee the safe operation of DC power system better, increase substantially the reliability of DC power-supply system, the potential security risk of electric power netting safe running is reduced to minimum degree, can really realizes the unattended operation of transforming plant DC power supply.
In the prior art, DC power supply feeds out the loop and produces short supply interruption when switching, and causes the intermittent dead electricity of equipment, to such an extent as to load can't non-stop run.
Therefore need a kind of apparatus for fast switching to carry out reliable and stable control, guarantee the DC power supply uninterrupted power supply.
The utility model content
In view of this, the utility model purpose provides a kind of direct current duplicate supply device for intelligently switching, guarantee when under-voltage a, overvoltage of cover DC power supply and dead electricity the time, trouble power institute bringing onto load to be automatically switched to the normal power source device in 0 second, move incessantly to guarantee DC power supply.
Direct current duplicate supply device for intelligently switching described in the utility model comprises DC power supply I12, DC power supply II22, I section bus 11, II section bus 21, detecting unit I13, detecting unit II23, control unit 5, described detecting unit I13 is arranged on the DC power supply I12, gather DC power supply I12 and go up magnitude of voltage, and Input Control Element 5, described DC power supply I12 links to each other with I section bus 11 by D.C. contactor IK1; Described detecting unit II23 is arranged on the DC power supply II22, gather DC power supply II22 and go up magnitude of voltage, and in the Input Control Element 5, described DC power supply II22 links to each other with II section bus 21 by D.C. contactor IIK2; Described I section bus 11 and II section bus 21 are connected by D.C. contactor IIIK3; The coil of described D.C. contactor IK1, D.C. contactor IIK2 and D.C. contactor IIIK3 is connected with control unit 5 by control circuit.
Further, described direct current duplicate supply device for intelligently switching also includes the auxiliary commutation circuit 4 that is connected between I section bus 11 and the II section bus 21, and is connected with control unit 5, and described auxiliary commutation circuit 4 is the bidirectional thyristor circuit.
Further, be in series with ammeter respectively on described I section bus 11 and the II section bus 21, be parallel with voltmeter respectively between described I section bus 11 and II section bus 21 and the positive source ground connection.
Further, described direct current duplicate supply device for intelligently switching is provided with touch screen, and this touch screen is connected with control unit 5.
The beneficial effects of the utility model: direct current duplicate supply device for intelligently switching described in the utility model can be guaranteed to automatically switch to the power supply of the normal operation in another road when under-voltage a, overvoltage of cover DC power supply and dead electricity the time; And when the voltage difference of two sections buses reaches the trigger voltage of auxiliary commutation circuit, auxiliary commutation circuit conducting, make not decompression of bus that two sections bus parallel connections make trouble power in advance, finish free of discontinuities and switch and trouble power institute bringing onto load can be automatically switched to the normal power source device in 0 second, promptly free of discontinuities is switched.If after eliminating of DC power supply fault or DC power supply voltage recovered normally, the original state that is provided with automaticallyed switch back.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Figure is a direct current duplicate supply device for intelligently switching schematic diagram.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Accompanying drawing is a direct current duplicate supply device for intelligently switching schematic diagram.As shown in the figure, the utility model comprises DC power supply I12, DC power supply II22, I section bus 11, II section bus 21, detecting unit I13, detecting unit II23, control unit 5, described detecting unit I13 is arranged on the DC power supply I12, gather DC power supply I12 and go up magnitude of voltage, and Input Control Element 5, described DC power supply I12 links to each other with I section bus 11 by D.C. contactor IK1; Described detecting unit II23 is arranged on the DC power supply II22, gather DC power supply II22 and go up magnitude of voltage, and in the Input Control Element 5, described DC power supply II22 links to each other with II section bus 21 by D.C. contactor IIK2; Described I section bus 11 and II section bus 21 are connected by D.C. contactor IIIK3; The coil of described D.C. contactor IK1, D.C. contactor IIK2 and D.C. contactor IIIK3 is connected with control unit 5 by control circuit.
When DC power supply I and DC power supply II normal power supply, promptly the power supply voltage range of DC power supply I and DC power supply II be-59V≤U≤-during 43V, DC power supply I provides direct current to load 1, DC power supply II to load 2 for direct currents; Separate, do not disturb mutually, this moment D.C. contactor I, K2 be in closure state, D.C. contactor III is in open-circuit condition.
When DC power supply I output dc voltage U 〉=-43V or U≤-during 59V (can set), D.C. contactor III is at first closed, D.C. contactor I disconnects then; 1 group of load and 2 groups by DC power supply II for direct current.When detecting unit I detect DC power supply II voltage-59≤U≤-the 43V scope in, and when reaching stable state; Control unit control D.C. contactor I closure, D.C. contactor III disconnects then, makes DC power supply I be in normal condition, continuous firing.
When DC power supply II output dc voltage U 〉=-43V or U≤-during 59V, D.C. contactor III is at first closed, D.C. contactor II disconnects then; 1 group of load and 2 groups by DC power supply I for direct current.When detecting unit 2 detect DC power supply 2 voltages-59≤U≤-the 43V scope in, and when reaching stable state; Control unit control D.C. contactor II closure, D.C. contactor III disconnects then, makes DC power supply II be in normal condition, continuous firing.
Described direct current duplicate supply device for intelligently switching also includes the auxiliary commutation circuit 4 that is connected between I section bus 11 and the II section bus 21, and is connected with control unit 5, and described auxiliary commutation circuit 4 is the bidirectional thyristor circuit.In handoff procedure, utilize two-way in handoff procedure: before D.C. contactor I disconnects back, D.C. contactor III closure, when the voltage difference of two sections buses reaches the trigger voltage of bidirectional thyristor, the thyristor conducting, make bus that two sections bus parallel connections make trouble power not decompression, and then D.C. contactor III closure in advance; Before perhaps D.C. contactor II disconnects back, D.C. contactor III closure, when the voltage difference of two sections buses reaches the trigger voltage of bidirectional thyristor, the thyristor conducting makes bus that two sections bus parallel connections make trouble power not decompression, and then D.C. contactor III closure in advance.Be Millisecond the operate time of D.C. contactor in the direct current duplicate supply device for intelligently switching, and be 0s the switching time by auxiliary commutation circuit load end, and promptly free of discontinuities is switched.
Be in series with ammeter respectively on described I section bus 11 and the II section bus 21, be parallel with voltmeter respectively between described I section bus 11 and II section bus 21 and the positive source ground connection.
Described direct current duplicate supply device for intelligently switching is provided with touch screen, and this touch screen is connected with control unit 5.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1. direct current duplicate supply device for intelligently switching, comprise DC power supply I (12), DC power supply II (22), I section bus (11), II section bus (21), it is characterized in that: also comprise detecting unit I (13), detecting unit II (23), control unit (5), described detecting unit I (13) is arranged on the DC power supply I (12), gather DC power supply I (12) and go up magnitude of voltage, and Input Control Element (5), described DC power supply I (12) links to each other with I section bus (11) by D.C. contactor I (K1); Described detecting unit II (23) is arranged on the DC power supply II (22), gather DC power supply II (22) and go up magnitude of voltage, and in the Input Control Element (5), described DC power supply II (22) links to each other with II section bus (21) by D.C. contactor II (K2); Described I section bus (11) is connected by D.C. contactor III (K3) with II section bus (21); The coil of described D.C. contactor I (K1), D.C. contactor II (K2) and D.C. contactor III (K3) is connected with control unit (5) by control circuit.
2. according to the described direct current duplicate supply of claim 1 device for intelligently switching, it is characterized in that: described direct current duplicate supply device for intelligently switching also includes the auxiliary commutation circuit (4) that is connected between I section bus (11) and the II section bus (21), and be connected with control unit (5), described auxiliary commutation circuit (4) is the bidirectional thyristor circuit.
3. according to the described direct current duplicate supply of claim 1 device for intelligently switching, it is characterized in that: be in series with ammeter respectively on described I section bus (11) and the II section bus (21), be parallel with voltmeter respectively between described I section bus (11) and II section bus (21) and the positive source ground connection.
4. according to the described direct current duplicate supply of claim 1 device for intelligently switching, it is characterized in that: described direct current duplicate supply device for intelligently switching is provided with touch screen, and this touch screen is connected with control unit (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202653160U CN201750204U (en) | 2010-07-20 | 2010-07-20 | Direct current double-power-supply intelligent switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202653160U CN201750204U (en) | 2010-07-20 | 2010-07-20 | Direct current double-power-supply intelligent switching device |
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| Publication Number | Publication Date |
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| CN201750204U true CN201750204U (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202653160U Expired - Lifetime CN201750204U (en) | 2010-07-20 | 2010-07-20 | Direct current double-power-supply intelligent switching device |
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| CN (1) | CN201750204U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368630A (en) * | 2011-09-21 | 2012-03-07 | 漳州科华技术有限责任公司 | Seamless and circulation-less switching system for two groups of DC (direct current) power supplies |
| CN103259329A (en) * | 2013-05-28 | 2013-08-21 | 南京海勇电子科技有限公司 | Direct-current multiple-power switch-over switch |
| CN103401305A (en) * | 2013-07-31 | 2013-11-20 | 成都电业局双流供电局 | Intelligent communication power supply switching networking system with direct current contactor |
| CN103401304A (en) * | 2013-07-31 | 2013-11-20 | 成都电业局双流供电局 | Intelligent operation power supply switching networking system with direct current contactor |
| CN104333120A (en) * | 2014-11-11 | 2015-02-04 | 国家电网公司 | Improved 3D power switching device |
| CN105743210A (en) * | 2014-12-09 | 2016-07-06 | 广州巨浪船舶技术工程有限公司 | Intelligent detection device of double channel DC source seamless automatic switching device |
| CN106532919A (en) * | 2016-12-19 | 2017-03-22 | 广东电网有限责任公司东莞供电局 | System architecture for mutual hot backup of two segments of DC power buses |
| CN106655466A (en) * | 2016-11-10 | 2017-05-10 | 国网浙江省电力公司金华供电公司 | Power supply loop for communication power supply |
| CN107230966A (en) * | 2017-07-06 | 2017-10-03 | 成都交大许继电气有限责任公司 | Traction substation direct current dead electricity emergency protection system and method |
| CN112952983A (en) * | 2021-02-22 | 2021-06-11 | 广东电网有限责任公司 | Power supply switching circuit and control method thereof |
-
2010
- 2010-07-20 CN CN2010202653160U patent/CN201750204U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368630A (en) * | 2011-09-21 | 2012-03-07 | 漳州科华技术有限责任公司 | Seamless and circulation-less switching system for two groups of DC (direct current) power supplies |
| CN102368630B (en) * | 2011-09-21 | 2013-09-25 | 漳州科华技术有限责任公司 | Seamless and circulation-less switching system for two groups of DC (direct current) power supplies |
| CN103259329A (en) * | 2013-05-28 | 2013-08-21 | 南京海勇电子科技有限公司 | Direct-current multiple-power switch-over switch |
| CN103259329B (en) * | 2013-05-28 | 2016-06-29 | 南京海勇电驱动科技有限公司 | A kind of direct-current multiple-power switch-over switch |
| CN103401305A (en) * | 2013-07-31 | 2013-11-20 | 成都电业局双流供电局 | Intelligent communication power supply switching networking system with direct current contactor |
| CN103401304A (en) * | 2013-07-31 | 2013-11-20 | 成都电业局双流供电局 | Intelligent operation power supply switching networking system with direct current contactor |
| CN104333120B (en) * | 2014-11-11 | 2016-04-13 | 国家电网公司 | A kind of 3D power transfer device of improvement |
| CN104333120A (en) * | 2014-11-11 | 2015-02-04 | 国家电网公司 | Improved 3D power switching device |
| CN105743210A (en) * | 2014-12-09 | 2016-07-06 | 广州巨浪船舶技术工程有限公司 | Intelligent detection device of double channel DC source seamless automatic switching device |
| CN105743210B (en) * | 2014-12-09 | 2018-08-07 | 广州巨浪船舶技术工程有限公司 | The intelligent detection equipment of two-way direct current power supply is seamless automatic switching control equipment |
| CN106655466A (en) * | 2016-11-10 | 2017-05-10 | 国网浙江省电力公司金华供电公司 | Power supply loop for communication power supply |
| CN106532919A (en) * | 2016-12-19 | 2017-03-22 | 广东电网有限责任公司东莞供电局 | System architecture for mutual hot backup of two segments of DC power buses |
| CN107230966A (en) * | 2017-07-06 | 2017-10-03 | 成都交大许继电气有限责任公司 | Traction substation direct current dead electricity emergency protection system and method |
| CN112952983A (en) * | 2021-02-22 | 2021-06-11 | 广东电网有限责任公司 | Power supply switching circuit and control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110216 |