CN202260610U - Automatic switching device for two power supplies of direct-current system - Google Patents
Automatic switching device for two power supplies of direct-current system Download PDFInfo
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- CN202260610U CN202260610U CN 201120322764 CN201120322764U CN202260610U CN 202260610 U CN202260610 U CN 202260610U CN 201120322764 CN201120322764 CN 201120322764 CN 201120322764 U CN201120322764 U CN 201120322764U CN 202260610 U CN202260610 U CN 202260610U
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- direct current
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- battery system
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Abstract
The utility model discloses an automatic switching device for two power supplies of a direct-current system and is used for automatically switching two sets of storage battery systems. A positive electrode loop and a negative electrode loop at the outlet of each set of storage battery system are connected in series with a diode respectively in a positive direction and a negative direction and then connected in parallel to a direct-current bus through circuit breakers; and under a normal condition, the two circuit breakers are closed, and the two storage battery systems are connected to the direct-current bus. When one set of storage battery system fails, the storage battery system quits automatically, and the other set of storage battery system supplies power to the load immediately. The automatic switching device can guarantee isolation and delay-free automatic switching of the two sets of storage battery systems under various conditions, so that the stability and the reliability of power supply of the direct-current system are improved.
Description
Technical field
The utility model relates to field of power, relates in particular to a kind of transformer station station and uses the direct current system dual power supply automatic switching device.
Background technology
The transforming plant DC power-supply system is transformer station's control load and living load power supply, and 110V and 220V direct current system should adopt batteries, when standing with the AC power dead electricity, by batteries load is supplied power.The general cover battery system that adopts of single bus scheme mode, the mode that also can adopt a master one to be equipped with, two cover battery systems insert dc bus through circuit breaker.
The two cover battery system supply power modes that one master one is equipped with; Under normal circumstances, the breaker closing of main storage battery system, the main storage battery system inserts dc bus; At needs main storage battery system overhaul or this group storage battery being broken down needs when out of service; Break off the circuit breaker of main storage battery system, the circuit breaker of closed standby battery system inserts dc bus with the standby battery system.Therefore, need pay close attention to two cover battery systems, but in manual work or automatic switchover circuit breaker process; The capital produces time-delay; Under the Alternating Current Power Supply normal condition, this time-delay can not exert an influence to load, but is exchanging under the situation of dead electricity by the battery system power supply; This time-delay possibly cause influence in various degree to load, even may influence the reliability of whole direct current supply.
The utility model content
The technical problem that the utility model will solve is; Above-mentioned defective to prior art; Provide a kind of by one main one be equipped with two cover battery systems power supplies automatic switching control equipment,, do not have time-delay automatically and switch to the standby battery system when out of service in the main storage battery system; Thereby guarantee the continuity and stability of direct current supply, improved the reliability of power supply.
The utility model solves the technical scheme that its technical problem adopted: the diode of connecting with the positive and negative direction of negative loop difference in the anodal loop of every cover battery system outlet, be connected in parallel to dc bus through circuit breaker then, and as shown in Figure 1.A kind of direct current system dual power supply automatic switching device; Being used for dc main bus+KM/-KM automaticallyes switch between two cover battery systems; It is characterized in that; This direct current system dual power supply automatic switching device comprises circuit breaker Q F1 and QF2 and four diode DZ1, DZ2, DZ3, DZ4, wherein, and diode DZ1, DZ2 and to be connected in parallel on dc main bus+KM/-KM after circuit breaker Q F1 connects last; Diode DZ3, DZ4 and to be connected in parallel on dc main bus+KM/-KM after circuit breaker Q F2 connects last, circuit breaker Q F1, QF2 are in "on" position simultaneously.
Further; A kind of direct current system dual power supply automatic switching device; It is characterized in that; Said direct current system dual power supply automatic switching device inserts direct current system dc bus+L1/-L1 and+L2/-L2 respectively, diode DZ1, DZ2 and be connected in parallel between dc main bus+KM/-KM and the direct current system dc bus+L1/-L1 after circuit breaker Q F1 connects, diode DZ3, DZ4 and be connected in parallel between dc main bus+KM/-KM and the direct current system dc bus+L2/-L2 after circuit breaker Q F2 connects; Circuit breaker Q F5, QF6 are respectively the outlet breaker of two cover battery systems, and circuit breaker Q F1, QF2, QF5, QF6 are in "on" position simultaneously.
Further, a kind of direct current system dual power supply automatic switching device is characterized in that diode DZ1, DZ2 are provided with by-pass switch QF3, and said by-pass switch QF3 is connected in parallel between dc main bus+KM/-KM and the direct current system dc bus+L1/-L1; Diode DZ3, DZ4 are provided with by-pass switch QF4, and said by-pass switch QF4 is connected in parallel between dc main bus+KM/-KM and the direct current system dc bus+L2/-L2, and when by-pass switch QF3 closed a floodgate, by-pass switch QF4 broke off; When by-pass switch QF4 closed a floodgate, by-pass switch QF3 broke off.
Further, a kind of direct current system dual power supply automatic switching device is characterized in that, said battery system comprises and fills batteries and charging, electric discharge device and direct current monitor module, the wherein preferred 120Ah of batteries capacity.
Further, a kind of direct current system dual power supply automatic switching device is characterized in that, the voltage of said dc main bus+KM/-KM is direct current 220V, all preferred 1000V/300A of the parameter of said diode DZ1, DZ2, DZ3, DZ4.
The utility model adopts the automatic switching control equipment of direct current dual power supply; In the main storage battery system when out of service; Automatically do not have time-delay and switch to the standby battery system; Produce a stable dc power supply that powers to the load all the time thus, thereby guarantee the continuity and stability of AC Substation direct current supply, improved the reliability of transformer station's power supply.The utility model is simple in structure in addition, implements the utility model and not only can save cost, can also greatly prolong the useful life of DC power supply.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the schematic diagram of an embodiment of the utility model;
Fig. 2 is the schematic diagram of another embodiment of the utility model.
Embodiment
Battery system comprises and fills batteries and charging, electric discharge device and direct current monitor module etc. that the batteries capacity can be preferably 120Ah; Among Fig. 1 and Fig. 2+and KM/-KM is a dc main bus, voltage can be preferably direct current 220V; Among Fig. 2+and L1/-L1 is a 1# direct current system dc bus ,+L2/-L2 is a 2# direct current system dc bus; DZ1, DZ2, DZ3, DZ4 are diode, and diode is the high-quality heavy-duty diode of 1000V/300A preferably, resolve its heat dissipation problem and work reliably to guarantee its long-term stability.
Among Fig. 1, the diode of connecting with the positive and negative direction of negative loop difference in the anodal loop of every cover battery system outlet is connected in parallel to dc bus through circuit breaker then.Under the normal condition, QF1 and QF2 are all closed, and two cover battery systems all insert dc bus.
Utilize the unilateral conduction of diode, when 1# battery system terminal voltage during, DZ1 and DZ2 conducting greater than 2# battery system terminal voltage, DZ3 and DZ4 by, by the 1# battery system load is supplied power; When breaking off QF1, system is supplied power to load by the 2# battery system immediately.In like manner, when 2# battery system terminal voltage during, DZ3 and DZ4 conducting greater than 1# battery system terminal voltage, DZ1 and DZ2 by, by the 2# battery system load is supplied power; When breaking off QF2, system is supplied power to load by the 1# battery system immediately.
Fig. 2 is the schematic diagram of another embodiment of the utility model; The operation principle of this embodiment is: diode DZ1, DZ2 and be connected in parallel on after QF1 connects+KM/-KM and+L1/-L1 between, diode DZ3, DZ4 and be connected in parallel on after QF2 connects+KM/-KM and+L2/-L2 between; QF5, QF6 are respectively the outlet breaker of 1# battery system and 2# battery system.
Under the normal condition, QF1, QF2, QF5, QF6 are in "on" position simultaneously.
QF3 is the by-pass switch of DZ1, DZ2, and QF4 is the by-pass switch of DZ3, DZ4.After any combined floodgate was arranged among QF3 and the QF4,3 circuit breakers of other among QF1 ~ QF4 all can not close a floodgate, but QF1 and QF4 parallel connection in short-term, QF2 and QF3 be parallel connection in short-term.In order to prevent between two systems, to produce circulation, QF3 and QF4 can not close a floodgate simultaneously.
When 1# battery system terminal voltage during, DZ1 and DZ2 conducting greater than 2# battery system terminal voltage, DZ3 and DZ4 by, by the 1# battery system load is supplied power; In like manner, when 2# battery system terminal voltage during, DZ3 and DZ4 conducting greater than 1# battery system terminal voltage, DZ1 and DZ2 by, by the 2# battery system load is supplied power.
When the 1# battery system broke down, the 1# battery system logged off automatically, and the voltage of 2# battery system can instead not irritated to 1# battery system; When the 2# battery system broke down, the 2# battery system logged off automatically, and the voltage of 1# battery system can instead not irritated to battery pack 2.Two Battery packs are backup relations each other.
When breaking off QF1 or QF5, system is supplied power to load by the 2# battery system immediately; When breaking off QF2 or QF6, system is supplied power to load by the 1# battery system immediately.
The model parameter of the capacity of the batteries that the utility model technical scheme is related, the voltage of dc main bus and diode is not limited to the preferred concrete parameter area of the utility model institute, but can select different batteries capacity, dc main bus voltage and diode model parameter according to the actual needs of substation project.
As stated; The described direct current system duplicate supply of the utility model is through the diode of connecting with the positive and negative direction of negative loop difference in the anodal loop of every cover battery system outlet; Be connected in parallel to dc bus through circuit breaker then; Under the normal condition, two circuit breakers are all closed, and two cover battery systems all insert dc bus.When the main storage battery system broke down, the main storage battery system logged off automatically, and the standby battery system supplies power to load immediately; Otherwise when the standby battery system broke down, the standby battery system logged off automatically, and the main storage battery system supplies power to load immediately.This scheme has solved under various situation, and two overlap the isolation of battery systems and do not have the time-delay automatic switchover, have guaranteed the stability and the reliability of DC power-supply system.
Claims (5)
1. direct current system dual power supply automatic switching device; Be used for dc main bus (+KM/-KM) automatically switch between the battery systems at two covers; It is characterized in that; This direct current system dual power supply automatic switching device comprises circuit breaker (QF1) and (QF2) and four diodes (DZ1), (DZ2), (DZ3), (DZ4), wherein, diode (DZ1), (DZ2) and be connected in parallel on after circuit breaker (QF1) is connected dc main bus (+KM/-KM) on; Diode (DZ3), (DZ4) and be connected in parallel on after circuit breaker (QF2) is connected dc main bus (+KM/-KM) on, circuit breaker (QF1), (QF2) are in "on" position simultaneously.
2. direct current system dual power supply automatic switching device according to claim 1; It is characterized in that; Said direct current system dual power supply automatic switching device insert respectively the direct current system dc bus (+L1/-L1) with (+L2/-L2); Diode (DZ1), (DZ2) and be connected in parallel on after circuit breaker (QF1) is connected dc main bus (+KM/-KM) and the direct current system dc bus (+L1/-L1) between; Diode (DZ3), (DZ4) and be connected in parallel on after circuit breaker (QF2) is connected dc main bus (+KM/-KM) and the direct current system dc bus (+L2/-L2) between; Circuit breaker (QF5), (QF6) are respectively the outlet breaker of two cover battery systems, and circuit breaker (QF1), (QF2), (QF5), (QF6) are in "on" position simultaneously.
3. direct current system dual power supply automatic switching device according to claim 2; It is characterized in that; Diode (DZ1), (DZ2) are provided with by-pass switch (QF3), said by-pass switch (QF3) be connected in parallel on dc main bus (+KM/-KM) and the direct current system dc bus (+L1/-L1) between; Diode (DZ3), (DZ4) are provided with by-pass switch (QF4); Said by-pass switch (QF4) be connected in parallel on dc main bus (+KM/-KM) and the direct current system dc bus (+L2/-L2) between; When by-pass switch (QF3) closed a floodgate, by-pass switch (QF4) broke off; When by-pass switch (QF4) closed a floodgate, by-pass switch (QF3) broke off.
4. according to claim 1,2 or 3 described direct current system dual power supply automatic switching devices, it is characterized in that said battery system comprises and fill batteries and charging, electric discharge device and direct current monitor module that wherein the batteries capacity is 120Ah.
5. according to claim 1,2 or 3 described direct current system dual power supply automatic switching devices; It is characterized in that; (+KM/-KM) voltage is direct current 220V to said dc main bus, and the parameter of said diode (DZ1), (DZ2), (DZ3), (DZ4) is 1000V/300A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120322764 CN202260610U (en) | 2011-08-31 | 2011-08-31 | Automatic switching device for two power supplies of direct-current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120322764 CN202260610U (en) | 2011-08-31 | 2011-08-31 | Automatic switching device for two power supplies of direct-current system |
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| Publication Number | Publication Date |
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| CN202260610U true CN202260610U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120322764 Expired - Fee Related CN202260610U (en) | 2011-08-31 | 2011-08-31 | Automatic switching device for two power supplies of direct-current system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842953A (en) * | 2012-08-16 | 2012-12-26 | 华中科技大学 | Double-power automatic conversion switch device |
| CN103532163A (en) * | 2013-09-23 | 2014-01-22 | 武汉大学 | Topological structure of hybrid direct-current power transmission system based on polarity switching and starting method |
| CN106532916A (en) * | 2016-12-07 | 2017-03-22 | 中国直升机设计研究所 | Parallel power supply control method for storage battery packs |
| CN107046325A (en) * | 2016-02-05 | 2017-08-15 | 中国船舶重工集团公司第七�三研究所 | A kind of rack installs the DC power-supply system of lead-acid batteries |
| CN107947253A (en) * | 2017-09-13 | 2018-04-20 | 浙江时通电气制造有限公司 | A kind of battery pack interlock in parallel and serial |
| CN109450080A (en) * | 2018-12-29 | 2019-03-08 | 烟台东方威思顿电气有限公司 | A kind of automatic redundancy zero propagation switching system of two dc power supply and method |
| CN110492600A (en) * | 2019-09-06 | 2019-11-22 | 智洋创新科技股份有限公司 | Substation's novel intelligent DC power system and maintaining method |
| CN114243673A (en) * | 2021-11-23 | 2022-03-25 | 中国长江电力股份有限公司 | High-reliability direct-current power supply system |
| CN114407734A (en) * | 2021-12-21 | 2022-04-29 | 西南交通大学 | Flexible traction power supply system and protection method |
-
2011
- 2011-08-31 CN CN 201120322764 patent/CN202260610U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842953A (en) * | 2012-08-16 | 2012-12-26 | 华中科技大学 | Double-power automatic conversion switch device |
| CN103532163A (en) * | 2013-09-23 | 2014-01-22 | 武汉大学 | Topological structure of hybrid direct-current power transmission system based on polarity switching and starting method |
| CN107046325A (en) * | 2016-02-05 | 2017-08-15 | 中国船舶重工集团公司第七�三研究所 | A kind of rack installs the DC power-supply system of lead-acid batteries |
| CN106532916A (en) * | 2016-12-07 | 2017-03-22 | 中国直升机设计研究所 | Parallel power supply control method for storage battery packs |
| CN106532916B (en) * | 2016-12-07 | 2019-10-18 | 中国直升机设计研究所 | A kind of battery group parallel operation control method |
| CN107947253A (en) * | 2017-09-13 | 2018-04-20 | 浙江时通电气制造有限公司 | A kind of battery pack interlock in parallel and serial |
| CN107947253B (en) * | 2017-09-13 | 2020-04-14 | 浙江时通电气制造有限公司 | Battery pack parallel and serial interlocking device |
| CN109450080A (en) * | 2018-12-29 | 2019-03-08 | 烟台东方威思顿电气有限公司 | A kind of automatic redundancy zero propagation switching system of two dc power supply and method |
| CN110492600A (en) * | 2019-09-06 | 2019-11-22 | 智洋创新科技股份有限公司 | Substation's novel intelligent DC power system and maintaining method |
| CN114243673A (en) * | 2021-11-23 | 2022-03-25 | 中国长江电力股份有限公司 | High-reliability direct-current power supply system |
| CN114407734A (en) * | 2021-12-21 | 2022-04-29 | 西南交通大学 | Flexible traction power supply system and protection method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20120831 |