CN104578364A - DC (direct current) backup power supply for power distribution station - Google Patents
DC (direct current) backup power supply for power distribution station Download PDFInfo
- Publication number
- CN104578364A CN104578364A CN201410821772.1A CN201410821772A CN104578364A CN 104578364 A CN104578364 A CN 104578364A CN 201410821772 A CN201410821772 A CN 201410821772A CN 104578364 A CN104578364 A CN 104578364A
- Authority
- CN
- China
- Prior art keywords
- charging
- iron phosphate
- lithium iron
- phosphate storage
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007600 charging Methods 0.000 claims abstract description 30
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims abstract description 29
- 230000000712 assembly Effects 0.000 claims abstract description 3
- 238000000429 assembly Methods 0.000 claims abstract description 3
- 230000035939 shock Effects 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
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- H02J7/0026—
Abstract
The invention discloses a DC (direct current) backup power supply for a power distribution station. Each backup battery assembly comprises a rechargeable battery pack and a DC booster circuit which are electrically connected with each other, wherein each DC booster circuit is electrically connected with a DC power supply bus-bar; each rechargeable battery pack consists of a plurality of lithium iron phosphate storage batteries connected in series in a forward direction and is also equipped with a charging device; each charging device comprises a quick charger and an additional charging circuit; each additional charging circuit comprises equilibrium charging modules and single battery management systems which are in one-to-one correspondence with the lithium iron phosphate storage batteries, and each single battery management system is in electric signal connection with each equilibrium charging module. The lithium iron phosphate storage batteries are adopted, so that the DC backup power supply has the advantages of small size, long service life, zero pollution and high safety performance; the backup battery assemblies are independent of one another, so that the failure rate is greatly decreased; the charging devices with equilibrium charging functions are used for charging the lithium iron phosphate storage batteries, so that over-charging and over-discharging phenomena are avoided while the charging speed is guaranteed.
Description
Technical field
The present invention relates to a kind of power supply, particularly a kind of power distribution station DC standby power, belongs to electric supply installation technical field.
Background technology
At present, in power distribution station, stand-by power supply mainly adopts lead acid accumulator, because direct current system generally adopts 48V or 110V direct current supply voltage, single-unit or a small amount of monomer lead acid storage battery cannot meet so high output voltage demand, for this reason, usually the series connection of more piece lead acid accumulator is adopted in prior art, to meet 48V or 110V direct current supply voltage requirements, its weak point is: as long as 1, have any point to occur open fault in batteries, whole batteries cannot power to the load, and tie point loosens also may cause fire incident; 2, require high to uniformity of storage batteries, need strict combo, the individual difference of storage battery can have a strong impact on the discharge and recharge precision of storage battery, part storage battery can be caused to overcharge for a long time or cross the situation of putting and cause service lifetime of accumulator to decline to a great extent; 3, single-unit or a small amount of cell batteries fault, affect whole group storage battery and use, storage battery utilance is low; 4, batteries can not be held by full capacity core online, and battery service workload is very big; 5, batteries can not realize dilatation easily; 6, lead acid accumulator Heavy Weight, useful life short, contaminated environment and be easy to Lou acid etc.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of power distribution station DC standby power is provided, solves in prior art and connect as DC standby power, lead acid accumulator causes that fail safe is low, the life-span is short, utilance is low, inconvenient dilatation and the technical problem such as not environmentally.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of power distribution station DC standby power, comprise some reserve battery assemblies, described reserve battery assembly comprises rechargeable battery pack and DC voltage booster circuit, the output of rechargeable battery pack is electrically connected with the input of DC voltage booster circuit, and the output of DC voltage booster circuit is electrically connected with direct current supply bus by diverter switch; Described rechargeable battery pack is made up of some lithium iron phosphate storage batteries of forward connecting; Rechargeable battery pack is also equipped with charging device, and described charging device comprises quick charger and boost charge circuit; Described boost charge circuit comprises: the equalizing charge module arranged with described lithium iron phosphate storage battery one_to_one corresponding and single battery management system, and single battery management system is connected with equalizing charge modular telecommunications number; When battery backup is in time being in low state of charge, first be that battery backup carries out quick charge by quick charger, when the charging current value of quick charger is reduced to the floor level of electric current of setting, it is that corresponding lithium iron phosphate storage battery carries out boost charge that single battery management system controls equalizing charge module.
Protecting against shock and accumulator is also provided with between described DC voltage booster circuit and diverter switch.
Described reserve battery assembly is provided with 2 ~ 4 groups.
Each rechargeable battery pack is composed in series by 4 joint lithium iron phosphate storage batteries.
The beneficial effect that the present invention reaches: 1, adopt lithium iron phosphate storage battery to replace lead acid accumulator, there is the advantage that volume is little, long service life, no pollution, security performance are high; 2, multiple reserve battery assembly is adopted, separate between each reserve battery assembly, as long as there is one group of reserve battery assembly normally to run, then do not affect the power supply of distribution system, greatly reduce failure rate, significantly improve the reliability of power distribution station DC standby power; 3, adopt parallel connection structure between each reserve battery assembly, there is not the possibility that intact reserve battery assembly is eliminated, increase substantially storage battery utilance, saved cost; 4, support that the reserve battery assembly of different batches, different manufacturers, different newness degree is used with, compatible strong; 5, adopt quick charger to be the quick charge of reserve battery assembly, arranging equalizing charge module is that single-unit lithium iron phosphate storage battery carries out boost charge, ensures while charging rate, avoids to overcharge, cross and put the infringement of phenomenon to lithium iron phosphate storage battery.The present invention can be used as 48V or 110V power distribution station DC standby power, has the advantages such as failure rate is low, safety and reliability are high, compatibility is strong.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Fig. 2 is the schematic block circuit diagram of charging device in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, be schematic block circuit diagram of the present invention, comprise reserve battery assembly, reserve battery assembly can arrange 2 ~ 4 groups, preferably 4 groups.Reserve battery assembly comprises rechargeable battery pack, DC voltage booster circuit and protecting against shock and accumulator.The output of rechargeable battery pack is electrically connected with the input of DC voltage booster circuit, and the output of DC voltage booster circuit is electrically connected with direct current supply bus by diverter switch.Protecting against shock and accumulator are series between DC voltage booster circuit and diverter switch, prevent circuit from switching and produce impulse current.Rechargeable battery pack is also equipped with charging device.
As shown in Figure 2, be the schematic block circuit diagram of charging device.Rechargeable battery pack is forward composed in series by 4 joint lithium iron phosphate storage batteries.Charging device comprises quick charger and boost charge circuit.Boost charge circuit comprises: the equalizing charge module arranged with lithium iron phosphate storage battery one_to_one corresponding and single battery management system, single battery management system is connected with equalizing charge modular telecommunications number.In order to avoid overcharging, crossing and putting the infringement of phenomenon to lithium iron phosphate storage battery, the present invention adopts the charging device with equalizing charge function to charge to lithium iron phosphate storage battery.Specific works process is as follows: first adopt quick charger to carry out big current serial connection charge to lithium iron phosphate storage battery group, ensure the speed of charging, make the energy of battery pack obtain supply in the short period of time.When charging current value is reduced to the floor level of electric current of setting, quick charger quits work, and single battery management system controls each equalizing charge module and starts working, and enters into the equalizing charge stage.In the equalizing charge stage, equalizing charge module carries out independent boost charge to each single-unit lithium iron phosphate storage battery, adopts constant voltage constant current charging method, when constant-voltage phase charging detects charging current lower limit, equalizing charge module from service, whole charging process is complete.Adopt this equalization scheme while guarantee charging rate, the power of equalizing charge module, volume and cost can be reduced greatly, make each single-unit lithium iron phosphate storage battery voltage after whole charging process terminates be consistent simultaneously.
For the stand-by power supply exporting DC48V, can adopt the lithium iron phosphate storage battery of 16 joint monomer voltage 3.2V, capacity 30Ah, every 4 joint lithium iron phosphate storage batteries are connected into 1 cover lithium iron phosphate storage battery group, the lithium iron phosphate storage battery group of totally 4 cover 12V, 30Ah.A 4 cover lithium iron phosphate storage battery group rechargeable battery pack exported as DC48V in series, 4 cover rechargeable battery pack work alone, and parallel connection uses, and arbitrary set of fault does not affect the output of whole direct current system.
Invention increases the fail safe of direct current system, the feature of environmental protection, reliability and useful life; Improve battery utilance, save battery cost; Support that the battery of different batches, different manufacturers, different newness degree is used with, compatible strong.
Below in conjunction with specific embodiment, analytical calculation is carried out to the reliability of invention:
For DC48V system, if conventional serial battery pack single battery reliability is 99%.DC48V series system needs 4 joint monomer voltages to be the lead acid accumulator of 12V, reliability=(99%) after 4 joint storage battery series connection
4=96.06%; Wherein 1 joint accumulator failure, causing system to export has problem, and 4 joint series system probability of failures are 1-(99%)
4=3.94%.
The present invention adopts 4 cover battery backup, needs 16 joint monomer voltages to be the lithium iron phosphate storage battery of 3.2V altogether, forms 4 cover lithium iron phosphate storage battery groups, if the reliability of single cover battery backup is 98%, and unreliable degree t=1-98%=2%.Total reliability=1-t of 4 cover battery backup
4=1-(2%)
4≈ 1(power-off probability can be considered zero).
Below from raising battery utilance, cost-saving angle carries out analytical calculation to beneficial effect of the present invention:
For 1000, certain urban area required configuration in 10kV station 48V direct current system (adopting series-connected cell technology), batteries totally 1000 groups.Conservative estimation has the batteries of 5% to need because of single battery damage to change maintenance every year.Be eliminated intact number of batteries: 1000 × 5% × (4-1)=150.As adopted 110V direct current system, the intact number of batteries that is eliminated is more, can reach 1000 × 5% × (9-1)=400.The parallel connection of reserve battery assembly uses by the present invention, there is not the possibility that intact battery is eliminated, has saved cost.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (4)
1. a power distribution station DC standby power, it is characterized in that, comprise some reserve battery assemblies, described reserve battery assembly comprises rechargeable battery pack and DC voltage booster circuit, the output of rechargeable battery pack is electrically connected with the input of DC voltage booster circuit, and the output of DC voltage booster circuit is electrically connected with direct current supply bus by diverter switch;
Described rechargeable battery pack is made up of some lithium iron phosphate storage batteries of forward connecting; Rechargeable battery pack is also equipped with charging device, and described charging device comprises quick charger and boost charge circuit; Described boost charge circuit comprises: the equalizing charge module arranged with described lithium iron phosphate storage battery one_to_one corresponding and single battery management system, and single battery management system is connected with equalizing charge modular telecommunications number;
When battery backup is in time being in low state of charge, first be that battery backup carries out quick charge by quick charger, when the charging current value of quick charger is reduced to the floor level of electric current of setting, it is that corresponding lithium iron phosphate storage battery carries out boost charge that single battery management system controls equalizing charge module.
2. power distribution station DC standby power according to claim 1, is characterized in that, is also provided with protecting against shock and accumulator between described DC voltage booster circuit and diverter switch.
3. power distribution station DC standby power according to claim 1, is characterized in that, described reserve battery assembly is provided with 2 ~ 4 groups.
4. power distribution station DC standby power according to claim 1, is characterized in that, each rechargeable battery pack is composed in series by 4 joint lithium iron phosphate storage batteries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821772.1A CN104578364A (en) | 2014-12-26 | 2014-12-26 | DC (direct current) backup power supply for power distribution station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821772.1A CN104578364A (en) | 2014-12-26 | 2014-12-26 | DC (direct current) backup power supply for power distribution station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104578364A true CN104578364A (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410821772.1A Pending CN104578364A (en) | 2014-12-26 | 2014-12-26 | DC (direct current) backup power supply for power distribution station |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901390A (en) * | 2015-06-23 | 2015-09-09 | 北京工业大学 | Balancing method and circuit of serially-connected battery pack/super capacitor set |
| CN107276154A (en) * | 2017-06-19 | 2017-10-20 | 广东电网有限责任公司惠州供电局 | Adaptive single battery balancer |
| CN109167111A (en) * | 2018-07-12 | 2019-01-08 | 国网山西省电力公司电力科学研究院 | The LiFePO4 standby battery group charging method for inhibiting circulation to generate |
| CN109245274A (en) * | 2018-09-13 | 2019-01-18 | 深圳供电局有限公司 | A kind of substation's emergency cell device quickly accessing direct current system |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004248494A (en) * | 2003-02-11 | 2004-09-02 | O2 Micro Inc | Selector circuit for power supply management in a plurality of battery systems |
| CN101867204A (en) * | 2010-05-18 | 2010-10-20 | 临清迅发电器有限责任公司 | Battery energy management device of electric vehicle and method |
| CN201750186U (en) * | 2010-08-13 | 2011-02-16 | 烟台东方电子玉麟电气有限公司 | Battery pack charging device |
| CN203301212U (en) * | 2013-06-25 | 2013-11-20 | 厦门众芯电气设备有限公司 | Dual standby saving type DC power supply system |
-
2014
- 2014-12-26 CN CN201410821772.1A patent/CN104578364A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004248494A (en) * | 2003-02-11 | 2004-09-02 | O2 Micro Inc | Selector circuit for power supply management in a plurality of battery systems |
| CN101867204A (en) * | 2010-05-18 | 2010-10-20 | 临清迅发电器有限责任公司 | Battery energy management device of electric vehicle and method |
| CN201750186U (en) * | 2010-08-13 | 2011-02-16 | 烟台东方电子玉麟电气有限公司 | Battery pack charging device |
| CN203301212U (en) * | 2013-06-25 | 2013-11-20 | 厦门众芯电气设备有限公司 | Dual standby saving type DC power supply system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901390A (en) * | 2015-06-23 | 2015-09-09 | 北京工业大学 | Balancing method and circuit of serially-connected battery pack/super capacitor set |
| CN104901390B (en) * | 2015-06-23 | 2017-05-24 | 北京工业大学 | Balancing method and circuit of serially-connected battery pack/super capacitor set |
| CN107276154A (en) * | 2017-06-19 | 2017-10-20 | 广东电网有限责任公司惠州供电局 | Adaptive single battery balancer |
| CN107276154B (en) * | 2017-06-19 | 2023-04-28 | 广东电网有限责任公司惠州供电局 | Self-adaptive storage battery monomer equalization device |
| CN109167111A (en) * | 2018-07-12 | 2019-01-08 | 国网山西省电力公司电力科学研究院 | The LiFePO4 standby battery group charging method for inhibiting circulation to generate |
| CN109245274A (en) * | 2018-09-13 | 2019-01-18 | 深圳供电局有限公司 | A kind of substation's emergency cell device quickly accessing direct current system |
| 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 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 210009 Gulou District, Jiangsu, Nanjing new model road, No. 5 Applicant after: Chinese energy construction group Jiangsu Prov. Power Design Inst Co., Ltd Address before: 210009 Gulou District, Jiangsu, Nanjing new model road, No. 5 Applicant before: Jiangsu Electric Power Designing Institute |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: JIANGSU ELECTRIC POWER DESIGNING INST. TO: CHINA ENERGY ENGINEERING GROUP JIANGSU ELECTRIC POWER DESIGN INSTITUTE CO., LTD. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
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| RJ01 | Rejection of invention patent application after publication |