CN106787040A - DC power system - Google Patents
DC power system Download PDFInfo
- Publication number
- CN106787040A CN106787040A CN201611105222.5A CN201611105222A CN106787040A CN 106787040 A CN106787040 A CN 106787040A CN 201611105222 A CN201611105222 A CN 201611105222A CN 106787040 A CN106787040 A CN 106787040A
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- converter
- battery
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- power system
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- 238000012544 monitoring process Methods 0.000 claims abstract description 35
- 230000002159 abnormal effect Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 18
- 238000013461 design Methods 0.000 abstract description 4
- 238000012216 screening Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 1
- 208000032953 Device battery issue Diseases 0.000 description 1
- 235000012364 Peperomia pellucida Nutrition 0.000 description 1
- 240000007711 Peperomia pellucida Species 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
-
- 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
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to power technique fields, the present invention provides a kind of DC power system, including Alternating Current Unit, monitoring unit, at least one AC-DC converter, at least one DC dc converter, at least one battery, dc bus and Direct Current Distribution Unit；Monitoring unit controls Alternating Current Unit to export alternating current to each AC-DC converter, and control each AC-DC converter to pass through bus to each DC dc converter and Direct Current Distribution Unit output direct current, so that each DC dc converter charges to each corresponding battery and Direct Current Distribution Unit is powered to the load, DC power system simple structure of the present invention, battery is matched without screening, different size size battery can be used with, reduce design difficulty, considerably reduce influence degree of the single accumulator capacity change to power system capacity, improve battery utilization rate, extension battery and reliability, reduce system operation cost.
Description
Technical field
The present invention relates to power technique fields, more particularly to a kind of DC power system.
Background technology
Existing DC power system is made up of AC power, rectifier, battery and Direct Current Distribution Unit.Usually rely on
A number of battery is individual to connect to obtain system terminal voltage, because cascaded structure charging and discharging circuit electric current is consistent, if stored
There is larger difference in battery, then will necessarily produce and overcharge or over-discharge phenomenon, aggravate cell damage degree, rapidly shorten
Battery life, it is therefore desirable to be strict with being consistent property of performance parameter between battery individuality, exists ask in the prior art
Topic：
1st, the requirement that battery is used in series to battery consistency is high, and same batch battery also is difficult to ensure absolute one
Cause property, and battery individual difference continues to expand in system operation.Due to the otherness existed between battery,
The super-charge super-discharge of the inevitable generation cell in battery whole group charge and discharge process, causes to be exported because of individual problem influence whole group
Increased risk.
2nd, the exceptions such as connection loosening occurs in any point when battery is connected can all influence the regular picture of whole group battery, very
To meeting because heating cause fire.
3rd, series-connected batteries flash-over characteristic follows Bucket Principle, and batteries discharge capacity depends on physical capacity in group
That minimum battery, single accumulator capacity declines even open circuit and directly affects whole group electric discharge, system backup power supply reliability
In the presence of very big potential safety hazard.
4. single accumulator capacity drops to nominal capacity below 80%, is needed if terminal voltage requirement is can not meet after removing
Whole group battery is changed, the significant wastage in economy and resource is caused.
5th, can not realize that batteries are held in line core, it is online to change.Do a group storage battery core and hold experiment, standby storage need to be carried out
Battery pack switches, and batteries are offline, takes fictitious load electric discharge, and the risk of fictitious load burn is had therebetween.Electric discharge knot
Shu Hou, is full of, instant failure occurs in follow-up practical application if charging accumulator capacity will be made falseness occur not in time.Together
When, because batteries cannot be changed online, if Individual cells break down must whole group change offline.
The content of the invention
It is an object of the invention to provide a kind of DC power system, it is intended to solve batteries present in prior art
Coherence request is high, the problem that reliability is low and security is low.
The present invention is achieved in that first aspect provides a kind of DC power system, and the DC power system includes
Alternating Current Unit, monitoring unit, at least one AC-DC converter, at least one DC dc converter, at least one
Battery, dc bus and Direct Current Distribution Unit；
The input connection AC power of the Alternating Current Unit, the output end of the Alternating Current Unit connects each
The voltage input end of AC-DC converter, the voltage output end connection dc bus of each AC-DC converter, institute
State dc bus and connect the first voltage input/output terminal of each DC dc converter and the voltage of the Direct Current Distribution Unit
Input, the second voltage input/output terminal of each DC dc converter connects corresponding battery, and the direct current is matched somebody with somebody
The multiple loads of voltage output end connection of electric unit, the signal input output end of the monitoring unit connects the AC distribution list
The signal input output end of unit, the signal input output end of each AC-DC converter, described each DC become
The signal input output end of the signal input output end of parallel operation and the Direct Current Distribution Unit；
The monitoring unit controls the Alternating Current Unit to export alternating current to described each AC-DC converter, and
Described each AC-DC converter of control is matched somebody with somebody by the bus to described each DC dc converter and the direct current
Electric unit exports direct current, so that described each DC dc converter charges to corresponding each battery and makes institute
Direct Current Distribution Unit is stated to power to the load.
With reference in a first aspect, used as the first implementation method of first aspect, the monitoring unit detects the exchange
When power supply unit occurs abnormal, the Alternating Current Unit is controlled to stop output alternating current, and control described each DC
It is backward described DC bus powered that converter carries out DC converting to the voltage of corresponding battery output.
With reference to the first implementation method of first aspect, as second implementation method of first aspect, the monitoring list
Unit is by detecting the output voltage of the Alternating Current Unit to judge whether it exception occurs.
With reference to the first implementation method of first aspect, as the third implementation method of first aspect, the monitoring list
When the combination that unit detects one pair of which DC dc converter and battery occurs abnormal, this pair of DC dc converter is controlled
Combination with battery stops output voltage.
With reference to the third implementation method of first aspect, as the 4th kind of implementation method of first aspect, the monitoring list
Unit detects one pair of which DC dc converter and when combining the voltage for exporting beyond predetermined voltage range, judges with battery
This pair of DC dc converter occurs abnormal with the combination of battery.
With reference to the third implementation method of first aspect, as the 5th kind of implementation method of first aspect, the monitoring list
When unit detects certain AC-DC converter appearance exception, the AC-DC converter is controlled to stop output voltage.
With reference to the 5th kind of implementation method of first aspect, as the 6th kind of implementation method of first aspect, the monitoring list
Unit is by detecting the output voltage of each AC-DC converter to judge whether it exception occurs.
With reference in a first aspect, used as the 7th kind of implementation method of first aspect, the battery is the electric power storage of different model
Pond.
The present invention provides a kind of DC power system, and DC power system includes Alternating Current Unit, monitoring unit, at least
One AC-DC converter, at least one DC dc converter, at least one battery, dc bus and DC distribution
Unit；Monitoring unit controls Alternating Current Unit to export alternating current to each AC-DC converter, and controls each exchange straight
Current converter exports direct current by bus to each DC dc converter and Direct Current Distribution Unit, so that each direct current is straight
Current converter charges to each corresponding battery and Direct Current Distribution Unit is powered to the load, dc source of the present invention
System architecture is simple, and battery is matched without screening, and different size size battery can be used with, reduce design difficulty, significantly
Influence degree of the single accumulator capacity change to power system capacity is reduced, battery utilization rate is improve, extension battery uses the longevity
Life and reliability, reduce system operation cost.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to embodiment or description of the prior art
Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description are only more of the invention
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of DC power system that an embodiment of the present invention is provided.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical scheme, illustrated below by specific embodiment.
The embodiment of the present invention provides a kind of DC power system, as shown in figure 1, DC power system includes AC distribution list
Unit 20, monitoring unit 10, at least one AC-DC converter 40, at least one DC dc converter 50, at least one store
Battery 60, dc bus 80 and Direct Current Distribution Unit 30；
The input connection AC power of Alternating Current Unit 20, the output end of Alternating Current Unit 20 connects each exchange
The voltage input end of DC converter 40, the voltage output end connection dc bus 80 of each AC-DC converter 40, direct current
Bus 80 connects the first voltage input/output terminal of each DC dc converter 50 and the control source of Direct Current Distribution Unit 30
End, the second voltage input/output terminal of each DC dc converter 50 connects corresponding battery 60, DC distribution list
The multiple loads 70 of voltage output end connection of unit 30, the signal input output end connection Alternating Current Unit 20 of monitoring unit 10
Signal input output end, the signal input output end of each AC-DC converter 40, the letter of each DC dc converter 50
The signal input output end of number input/output terminal and Direct Current Distribution Unit 30；
Monitoring unit 10 controls Alternating Current Unit 20 to export alternating current to each AC-DC converter 40, and controls every
Individual AC-DC converter 40 exports direct current by bus to each DC dc converter 50 and Direct Current Distribution Unit 30,
So that each DC dc converter 50 charges to each corresponding battery 60 and makes Direct Current Distribution Unit 30 to negative
70 are carried to power.
For Alternating Current Unit 20, it is used for incoming transport power supply and output AC power source, such as 220V AC powers.
For AC/DC converters (AC-DC converter 40), belong to high-frequency isolation converter, be set to multiple,
AC-DC converter 40 uses multiple module paralleling Redundancy Design, after each AC/DC converter carries out AC/DC transfer
Powered to dc bus 80.
For DC/DC converters (DC dc converter 50), belong to high-frequency isolation converter, be set to multiple,
It is parallel with one another between the AC/DC converters DC/DC converters corresponding with AC/DC converters, each equal one end of DC/DC converters
An independent battery 60 is connected with, one end connection dc bus 80, DC/DC converters can be realized the direct current in bus
Voltage is carried out after DC converting as battery 60 charges, it is also possible to be female after realizing for the voltage of battery 60 carrying out DC converting
Line is powered.
For Direct Current Distribution Unit 30, the multiple loads 70 of its connection, for the direct voltage output of dc bus 80 to be given
Load 70 is powered.
For monitoring unit 10, it is used to monitor Alternating Current Unit 20, each AC/DC converter, each DC/DC conversion
Device and Direct Current Distribution Unit 30, for controller output voltage, carry out voltage conversion and judge whether it exception occurs.
For battery 60, it is attached with each DC/DC converter respectively, equivalent to being connected in parallel each other
On bus, wherein, battery 60 can be the battery of different model.
Embodiment of the present invention system architecture is simple, greatly improves power supply reliability, and battery is matched without screening, different product
Board, different size size battery can be used with, reduce design difficulty, considerably reduce single accumulator capacity change to system
The influence degree of capacity, improves battery utilization rate, extends battery, and save resources reduce system operation cost.
Used as a kind of implementation method of the embodiment of the present invention, monitoring unit 10 detects Alternating Current Unit 20 and exception occurs
When, control Alternating Current Unit 20 stops output alternating current, and controls each DC dc converter 50 to corresponding storage
The voltage of the output of battery 60 is powered after carrying out DC converting to dc bus 80.
Wherein, when AC power is normal, supplied to dc bus 80 by AC/DC converters from Alternating Current Unit 20
Electricity, meanwhile, DC decompression is carried out by each DC/DC converter from dc bus 80 and is charged to respective battery 60.Work as friendship
During stream abnormity of power supply, battery 60 carries out DC boosting and is powered to dc bus 80 by respective DC/DC converters.Two kinds of confessions
Power mode realizes 0ms seamless switchings, it is ensured that the continuity of the power supply of dc bus 80, so as to improve power supply reliability.
Specifically, monitoring unit 10 judges it is different whether it occurs by detecting the output voltage of Alternating Current Unit 20
Often, for example when the output voltage of Alternating Current Unit 20 is detected not in predetermined voltage range, you can judge that it breaks down,
The switching being powered.
Used as a kind of implementation method of the embodiment of the present invention, monitoring unit 10 detects one pair of which DC dc converter
50 with the combination of battery 60 when occurring abnormal, controls this pair of DC dc converter 50 to stop output with the combination of battery 60
Voltage.
Specifically, monitoring unit 10 detects one pair of which DC dc converter 50 with the combination output of battery 60
When voltage exceeds predetermined voltage range, judge that this pair of DC dc converter 50 occurs with the combination of battery 60 abnormal.
Based on embodiment of the present invention, when cell or connected DC dc converter 50 break down
When, need to only control the DC dc converter 50 to stop output voltage, you can individually it to be repaired or is replaced, is kept away
The replacement of integral battery door group is exempted from.
Used as a kind of implementation method of the embodiment of the present invention, monitoring unit 10 detects certain AC-DC converter 40 and goes out
When now abnormal, the AC-DC converter 40 is controlled to stop output voltage.
Monitoring unit 10 is by detecting the output voltage of each AC-DC converter 40 to judge whether it exception occurs.
Based on embodiment of the present invention, when cell or connected AC-DC converter 40 break down
When, need to only control the AC-DC converter 40 to stop output voltage, it is to avoid control all AC-DC converters 40
Stop output voltage.
Further, battery 60 can be the battery of different model, and each battery is connected with monitoring unit, monitors
Unit obtains the type of battery, and control battery is corresponding when the electricity residue preset value of battery is detected according to the type
DC dc converter is stopped, and voltage tester terminal T quantity has two, respectively first voltage calibrating terminal T1 and second
Voltage tester terminal T2；The first negative coefficient thermistors NTC1 of monitoring unit connection first voltage calibrating terminal T1, connection the
The second negative coefficient thermistors NTC2 of two voltage tester terminal T2, the identification diode of connection first voltage calibrating terminal T1
D1, it is high-impedance state that monitoring unit port Po is set first, and the magnitude of voltage for determining voltage tester terminal T is V_T1, then sets monolithic
Machine processor MCU port Po export high level, and the magnitude of voltage for determining voltage tester terminal T is V_T1 ', compare electricity before and after terminal T
Bucklingization is worth Δ V_T1, and finally Δ V_T1 is compared and can be known with the battery types definition table in processor of single chip computer MCU120
Other battery particular type.
The embodiment of the present invention has advantages below：
1) in system architecture, designed using parallel redundancy between AC/DC converters, between DC/DC converters, battery
Carry out forming indirectly in parallel between man-to-man fine management of charging and discharging, battery by DC/DC converters, it is separate, it is single
Battery failures do not interfere with whole group battery operation.
2) system uses DC/DC converters, is capable of achieving the transmitted in both directions of energy, and power can not only flow to defeated from input
Go out end, also can flow to input from output end, you can charged from dc bus one end to battery, also can be from battery to direct current
Bussed supply, while realizing the conversion of high-low voltage.
3) multiple DC/DC converters are in parallel, and output power, intermodule autonomous equalizing current, system reliability is high.
4) each branched battery is connected by the isolation circuit of DC/DC converters, belongs to indirect parallel way, in the absence of return
Do not resulted between road electric current, battery and interfered.
5) single battery can hold in line core, online to change.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
Specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the claims of the present invention by being submitted to determine.
Claims (8)
1. a kind of DC power system, it is characterised in that the DC power system include Alternating Current Unit, monitoring unit,
At least one AC-DC converter, at least one DC dc converter, at least one battery, dc bus and direct current
Power supply unit；
The input connection AC power of the Alternating Current Unit, the output end of the Alternating Current Unit connects each exchange
The voltage input end of DC converter, the voltage output end connection dc bus of each AC-DC converter is described straight
Stream bus connects the first voltage input/output terminal of each DC dc converter and the control source of the Direct Current Distribution Unit
End, the second voltage input/output terminal of each DC dc converter connects corresponding battery, the DC distribution list
The multiple loads of voltage output end connection of unit, the signal input output end of the monitoring unit connects the Alternating Current Unit
Signal input output end, the signal input output end of each AC-DC converter, described each DC dc converter
Signal input output end and the Direct Current Distribution Unit signal input output end；
The monitoring unit controls the Alternating Current Unit to export alternating current to described each AC-DC converter, and controls
Described each AC-DC converter is by the bus to described each DC dc converter and the DC distribution list
Unit's output direct current, so that described each DC dc converter charges to each corresponding battery and makes described straight
Stream power supply unit powers to the load.
2. DC power system as claimed in claim 1, it is characterised in that the monitoring unit detects the AC distribution
When unit occurs abnormal, the Alternating Current Unit is controlled to stop output alternating current, and control each DC conversion
It is backward described DC bus powered that device carries out DC converting to the voltage of corresponding battery output.
3. DC power system as claimed in claim 2, it is characterised in that the monitoring unit is matched somebody with somebody by detecting the exchange
The output voltage of electric unit is judging whether it exception occurs.
4. DC power system as claimed in claim 2, it is characterised in that the monitoring unit detects one pair of which direct current
When DC converter occurs abnormal with the combination of battery, this pair of DC dc converter is controlled to stop with the combination of battery defeated
Go out voltage.
5. DC power system as claimed in claim 4, it is characterised in that the monitoring unit detects one pair of which direct current
When the voltage of the combination output of DC converter and battery exceeds predetermined voltage range, judge this pair of DC dc converter with
The combination of battery occurs abnormal.
6. DC power system as claimed in claim 1, it is characterised in that the monitoring unit detects certain AC/DC
When converter occurs abnormal, the AC-DC converter is controlled to stop output voltage.
7. DC power system as claimed in claim 6, it is characterised in that the monitoring unit by detection it is described each hand over
The output voltage of DC converter is flowed to judge whether it exception occurs.
8. DC power system as claimed in claim 1, it is characterised in that the battery is the battery of different model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105222.5A CN106787040A (en) | 2016-12-05 | 2016-12-05 | DC power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105222.5A CN106787040A (en) | 2016-12-05 | 2016-12-05 | DC power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106787040A true CN106787040A (en) | 2017-05-31 |
Family
ID=58878168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611105222.5A Pending CN106787040A (en) | 2016-12-05 | 2016-12-05 | DC power system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181250A (en) * | 2017-07-26 | 2017-09-19 | 深圳市泰昂能源科技股份有限公司 | Parallel connection type DC power system and failure separation method |
| CN107247504A (en) * | 2017-07-26 | 2017-10-13 | 郑州云海信息技术有限公司 | A kind of server powersupply system |
| CN107465131A (en) * | 2017-09-14 | 2017-12-12 | 国网山东省电力公司 | A kind of intelligent mobile integrated power supply |
| CN110739765A (en) * | 2018-07-19 | 2020-01-31 | 尼吉康株式会社 | DC power supply system |
| CN110932572A (en) * | 2019-11-08 | 2020-03-27 | 国网冀北电力有限公司张家口供电公司 | Direct current power supply circuit and system |
| CN112462289A (en) * | 2020-11-18 | 2021-03-09 | 江苏为恒智能科技有限公司 | Storage battery pack online capacity checking management device |
| CN112970164A (en) * | 2018-11-20 | 2021-06-15 | 三菱电机株式会社 | DC power supply and distribution system |
| CN113067359A (en) * | 2021-03-30 | 2021-07-02 | 贵州电网有限责任公司 | Direct-current distribution voltage stabilizing system with intelligent bypass function and control method |
| CN113922476A (en) * | 2021-09-30 | 2022-01-11 | 石家庄通合电子科技股份有限公司 | High-safety module group direct-current power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112970164A (en) * | 2018-11-20 | 2021-06-15 | 三菱电机株式会社 | DC power supply and distribution system |
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| CN110932572A (en) * | 2019-11-08 | 2020-03-27 | 国网冀北电力有限公司张家口供电公司 | Direct current power supply circuit and system |
| CN112462289A (en) * | 2020-11-18 | 2021-03-09 | 江苏为恒智能科技有限公司 | Storage battery pack online capacity checking management device |
| CN113067359A (en) * | 2021-03-30 | 2021-07-02 | 贵州电网有限责任公司 | Direct-current distribution voltage stabilizing system with intelligent bypass function and control method |
| CN113922476A (en) * | 2021-09-30 | 2022-01-11 | 石家庄通合电子科技股份有限公司 | High-safety module group direct-current power supply |
| CN113922476B (en) * | 2021-09-30 | 2024-03-26 | 石家庄通合电子科技股份有限公司 | High-safety module group direct-current power supply |
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