CN106532889A - Direct-current power system having parallel battery modules and method - Google Patents
Direct-current power system having parallel battery modules and method Download PDFInfo
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- CN106532889A CN106532889A CN201611146024.3A CN201611146024A CN106532889A CN 106532889 A CN106532889 A CN 106532889A CN 201611146024 A CN201611146024 A CN 201611146024A CN 106532889 A CN106532889 A CN 106532889A
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- 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
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Abstract
The invention discloses a direct-current power system having parallel battery modules and method. The direct-current power system comprises an alternating-current distribution unit, the alternating-current distribution unit connects multiple paths of alternating-current inlet wires to an alternating-current bus to provide alternating current for a plurality of parallel battery modules connected in parallel, the parallel battery modules convert the alternating current and provide direct current for a direct-current bus, each direct-current feeder line is connected to the direct-current bus via a micro switch to take power from the direct-current bus, and the power is supplied to a load of each feeder line; each parallel battery module is configured with a group of storage batteries; when the alternating-current bus powers off, the parallel battery modules take power via the configured storage batteries, and output the power to the direct-current bus; and the parallel battery modules are connected with a monitoring device via respective communication ports to feed back respective working states. Normal work of the direct-current power system can be effectively guaranteed.
Description
Technical field
The present invention relates to a kind of DC power system with batteries in parallel connection module and method.
Background technology
Core of the accumulator as transformer station/power plant's DC power system, its reliability directly determine unidirectional current
The reliability that origin system is powered.Traditional DC power-supply system is together in series by more piece accumulator and constitutes accumulator battery to use
's.
And accumulator is used in series, have a disadvantage that
1) cell batteries fault impact whole group output.Internal storage battery chemical reaction or ion migration are difficult to artificial accurate
Control, serial number are more, and monomer failure occurrence probability is bigger.
2) storage battery parameter must be consistent.Different brands, different type, the electric power storage of even same producer's different batches
Pond can not be used in mixed way, and accumulator utilization ratio is reduced.
3) accumulator battery dilatation is difficult, generally requires replacing whole group accumulator.
4) accumulator battery can only whole group redundant configuration, redundant configuration high cost.
5) accumulator battery cannot realize online full capacity core appearance, on-bne repair, replacing.
Generally solved the above problems using batteries in parallel connection module, but as shown in figure 1, existing batteries in parallel connection module is worked as
During exchange input dead electricity, battery passes through the first DC transfer circuit and the second DC transfer circuit two-stage DC converting and supplies to load
Electricity, can all lose a part of efficiency per one-level DC converting, and whole efficiency is relatively low；Overload capability is poor；In load short circuits,
The short circuit current that DC transfer circuit is provided is less, it is impossible to which the chopper of Reliable guarantee fault loop reliably disconnects, and causes failure
Expanded range.
Meanwhile, just for single-unit 12V lead-acid accumulators, subject range is narrow for existing batteries in parallel connection module.It is typically no to match somebody with somebody
Put Storage Battery Monitor Unit, it is impossible to which the parameter such as temperature, single battery voltage, single battery internal resistance to accumulator is monitored.
Protection, monitoring to batteries in parallel connection module, control function refer to less, function not enough improve and DC transfer circuit efficiency compared with
It is low.
Therefore, it is badly in need of a kind of highly reliable, easy dilatation, the DC power system of easy care.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of DC power system with batteries in parallel connection module and side
Method, the present invention can realize that single batteries in parallel connection module failure does not affect other batteries in parallel connection module outputs, different batteries in parallel connection
The accumulator of module configuration need not be consistent, while there was only the conversion of 1 level power supply between power input and DC output end
Module, improves overall transformation efficiency, is directly connected to load by DC converter, significantly improves overload capability.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of DC power system with batteries in parallel connection module, including Alternating Current Unit, the Alternating Current Unit
Multichannel AC inlet wire is connected on ac bus, alternating current is provided for several batteries in parallel connection modules parallel with one another, it is described
Batteries in parallel connection module will provide unidirectional current for dc bus after convert alternating current, and each DC feeder is connected to direct current by miniature circuit breakers
On bus, from dc bus power taking, to the load supplying of this feeder line；Each batteries in parallel connection module configures a group storage battery, works as friendship
During stream bus power down, batteries in parallel connection module passes through the accumulator power taking for configuring, and to dc bus out-put supply；
The batteries in parallel connection module, including the filter circuit, rectification circuit, PFC circuit of power factor correction being sequentially connected,
First DC/DC changers, energy-storage travelling wave tube and current limiting element, are direct current output by the convert alternating current of input；
The outfan of the PFC circuit of power factor correction by the 2nd DC/DC changers connect accumulator, described first
The outfan of DC/DC changers connects the accumulator by the 3rd DC/DC changers；
The batteries in parallel connection module connects supervising device by respective port, feeds back respective working condition.
The outfan of the PFC circuit of power factor correction connects accumulator, the 2nd DC/ by the 2nd DC/DC changers
DC changers charge a battery when alternating current power supply is normal；
The accumulator by the 3rd DC/DC changers, the DC source boosting inverter that accumulator is input into be 110V or
220V DC voltages, Jing energy-storage travelling wave tube and current limiting element in parallel with the outfan of a DC/DC changers, output are defeated to module
Go out end, during normal work, Hot Spare of the 3rd DC/DC changers as a DC/DC changers；During overload, the 3rd DC/DC
Changer provides electric current output, with the common bringing onto load of a DC/DC changers.
The PFC circuit of power factor correction, a DC/DC changers, the 2nd DC/DC changers and the 3rd DC/DC become
Parallel operation is all connected with module monitors unit, the monitoring of receiving module monitoring unit, protection, control, and by module monitors unit with
Host computer is communicated.
The accumulator is connected with battery monitor unit, gathers voltage, temperature, internal resistance and the current information of accumulator, carries
For battery cell monitoring and protection.
Preferably, the accumulator is set of cells or battery, and set of cells includes the battery of multi-section serial.
The voltage range of the accumulator is 10-56V.
Preferably, a DC/DC changers, the 2nd DC/DC changers and the 3rd DC/DC changers adopt LLC
Resonance potential type topology.
Preferably, the module monitors unit is PFC circuit of power factor correction, a DC/DC changers, the 2nd DC/
DC changers and the 3rd DC/DC changers provide output over-voltage protection, output low-voltage protection, output overcurrent protection, mistake
Temperature protection and outfan short-circuit protection.
Preferably, module monitors unit monitoring PFC circuit of power factor correction, a DC/DC changers, second
The input voltage of DC/DC changers and the 3rd DC/DC changers, output voltage and output current.
Preferably, the single battery voltage of battery monitor unit monitoring accumulator, battery total voltage, battery current,
Battery remaining power and/or cell operating status.
Preferably, the filter circuit is EMI filter circuit.
Preferably, the accumulator of different batteries in parallel connection module configurations is similar and different.
Based on the method for work of above-mentioned DC power system, when exchange has electricity condition and loads normal, exchange input Jing
Filter circuit, rectification circuit and PFC circuit of power factor correction are transformed to DC voltage A, the first DC/DC changers of Jing after processing
110V or 220V direct voltage outputs are transformed to internal direct current bus, through energy-storage travelling wave tube and current limiting element, output is to outside
Dc bus, there is provided load is used, while unidirectional current of the 2nd DC/DC changers of the DC voltage A Jing conversion blood pressure lowering for 10-56V
Source is charged to accumulator, and the 3rd DC/DC converter boosts of cell voltage Jing are transformed to 110V or 220V DC voltages, output
To internal direct current bus, as the Hot Spare of a DC/DC changers.
Based on the method for work of above-mentioned DC power system, when power failure state is exchanged, a DC/DC changers and second
DC/DC changers do not work, and the conversion boosting of the 3rd DC/DC changers of cell voltage Jing is 110V or 220V DC voltages, is exported
To internal direct current bus, through energy-storage travelling wave tube and current limiting element, output to external dc bus, there is provided load is used.
Based on the method for work of above-mentioned DC power system, there is electricity in exchange, but during module overload operation, a DC/
DC changers and the 3rd DC/DC changers are worked simultaneously, while output current is to internal direct current bus, through energy-storage travelling wave tube and limit
Fluid element, output to external dc bus, there is provided load is used.
The 2nd DC/DC changers are charged management according to the charging curve of setting to accumulator.
When the accumulator is lead-acid accumulator, charged using three sections of constant-current charge, modified constant-voltage charge and floating charging bent
Line is charged；When accumulator is lithium ion battery, it is charged using Multi-section constant current charging curve.
Beneficial effects of the present invention are：
(1) present invention can adopt multiple batteries in parallel connection modules, therefore single batteries in parallel connection module failure does not affect other
Batteries in parallel connection module is exported, and ensure that the normal work of whole DC source；
(2) accumulator of different batteries in parallel connection module configurations of the invention need not be consistent, different batches, different factories
The accumulator of family can be used with, in addition newly, used batteries can use with, accumulator utilization ratio is high；
(3) accumulator battery dilatation of the invention is simple, it is only necessary to increase batteries in parallel connection module, redundant configuration simply,
Redundant configuration low cost；
(4) accumulator battery of the invention can full capacity core appearance, on-bne repair, replacing online；
(5) two alternating current inlet wires of connection of the invention, when exchanging dead electricity or phase shortage all the way wherein, automatically switch to another
Road alternating current inlet wire, improves the power supply reliability of ac bus；
(6) there was only the conversion of 1 level power supply between batteries in parallel connection modular power source input of the present invention and DC output end
Module, compared with existing design scheme, improves overall transformation efficiency；
(7) the first DC/DC changers of batteries in parallel connection module of the present invention and the 3rd DC/DC changers are connected to negative simultaneously
In load, overload capability is significantly improved, and in load short circuits, 2 DC transfer circuits can provide short circuit current, and electric current is defeated
Output capacity is 2 times of prior art, and the chopper of guarantee fault loop that can be more reliable disconnects, it is to avoid fault coverage expands；
(8) battery types of the matched somebody with somebody set of cells of batteries in parallel connection module can be lead-acid battery, lithium ion battery, lead carbon battery
Deng subject range is wider, except basic electric energy translation function is completed, also provides perfect protection, monitoring, control function；
(9) batteries in parallel connection module is configured with battery monitor unit, in battery temperature, single battery voltage, single battery
The parameters such as resistance are monitored.Effectively ensure the reliability of power-supply system, meanwhile, during being accumulator charge and discharge management,
More precise control charge-discharge parameter provides foundation.In addition, providing data supporting for the estimation of more accurate battery capacity；
(10) three DC-DC modules that batteries in parallel connection module is adopted all use LLC resonance potentials type topology, using DSP numbers
Word Sofe Switch algorithm controls.Above topology and algorithm switching loss are low, and energy conversion efficiency is high, and algorithm controls are flexible.
Description of the drawings
Fig. 1 is prior art batteries in parallel connection module frame chart；
Fig. 2 is the system structure diagram of the present invention；
Fig. 3 is the batteries in parallel connection modular structure schematic diagram of the present invention.
Specific embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Fig. 2 accumulator battery is connected by original more piece accumulator, multiple batteries in parallel connection wired in parallel are changed to.
Two alternating current inlet wires, by Alternating Current Unit, are connected on ac bus.The effect of Alternating Current Unit is：
When wherein exchanging dead electricity or phase shortage all the way, another road alternating current inlet wire is automatically switched to, improve the power supply reliability of ac bus.
Batteries in parallel connection module power taking from ac bus of 1 or more than 1, after conversion, output DC source is arrived
Dc bus.Each batteries in parallel connection module is parallel relationship.
Each DC feeder is connected on dc bus by miniature circuit breakers, from dc bus power taking, is supplied to the load of this feeder line
Electricity.The effect of miniature circuit breakers is, during normal work, can throw/cut load manually.This feeder line be short-circuited or excessively stream etc. therefore
During barrier, protect in time, cut away load fault, it is ensured that the normal power supply of whole DC power system.
Supervising device is connected with each parallel module by port, and each parallel module working condition is monitored, and root
It is controlled according to default logic.
The core of the system is batteries in parallel connection module and supervising device.
1) mode of operation of batteries in parallel connection module：
System includes 1 or 1 more parallel battery module, and each batteries in parallel connection module is connected to friendship by and off switch
Stream bus, after all of batteries in parallel connection module outfan parallel connection, is connected to dc bus, is the various equipment of transformer station/power plant
Power supply.
Each batteries in parallel connection module configures a group storage battery, and when ac bus power down, batteries in parallel connection module is by configuring
Accumulator power taking, and to dc bus out-put supply.
When ac bus have electricity, batteries in parallel connection module is charged to the accumulator of configuration, together by ac bus power taking
When, to dc bus out-put supply.
2) supervising device mode of operation
Supervising device is connected with each batteries in parallel connection module by 485 or CAN, monitors the operation of each batteries in parallel connection module
Situation, reports to the police to unusual condition.And according to the state-of-charge (dump energy of matched somebody with somebody battery in each batteries in parallel connection module
SOC), coordinate the output of each batteries in parallel connection module.Meanwhile, the battery health matched somebody with somebody by each batteries in parallel connection module is monitored,
Provide batteries in parallel connection module to safeguard, change suggestion.When in system, certain batteries in parallel connection module is safeguarded, changed, dynamic adjusts which
The output of his batteries in parallel connection module, it is ensured that the reliability service of whole DC power system.
As shown in figure 3, a kind of batteries in parallel connection module adopts the scheme of 3 DC transfer circuits, program global design is excellent
Point：
1) there was only the conversion of 1 level power supply between power input and DC output end, compared with existing design scheme, improve entirety
Conversion efficiency；
2) 2 DC converters (DC/DC1 and DC/DC3) are directly connected in load, overload capability is significantly improved；
3) 2 DC converters (DC/DC1 and DC/DC3) are directly connected in load, in load short circuits, 2 direct currents
Translation circuit can provide short circuit current, and current output capability is 2 times of prior art, and guarantee failure that can be more reliable is returned
The chopper on road disconnects, it is to avoid fault coverage expands.
1st, batteries in parallel connection module of the present invention, the battery for using can use the battery or battery of 10-56V voltage ranges
Group.It can be the set of cells of single battery, or multiple batteries series connection.Battery types can be lead-acid battery, lithium ion
Battery, lead carbon battery etc..Subject range is wider.
2nd, batteries in parallel connection module of the present invention, it is optional with battery monitor unit, to battery temperature, single battery voltage,
The parameters such as single battery internal resistance are monitored.Effectively ensure the reliability of power-supply system.Meanwhile, it is accumulator charge and discharge pipe
During reason, more precise control charge-discharge parameter provides foundation.In addition, providing number for the estimation of more accurate battery capacity
According to support.
3rd, batteries in parallel connection module of the present invention, except basic electric energy translation function is completed, also provides perfect protection, prison
Survey, control function.
3.1st, defencive function
1) module output over-voltage protection
2) module output low-voltage protection
3) module output overcurrent protection
4) module outfan short-circuit protection
5) module overheat protector
3.2nd, monitoring function
1) AC-input voltage monitoring
2) module output voltage monitoring
3) module output current monitoring
4) battery total voltage monitoring
5) single battery voltage monitoring
6) battery current monitoring monitoring
7) battery remaining power monitoring
8) cell operating status monitoring
9) battery temperature monitoring
3.3rd, control function
Manual powered control
Manual control of discharge
Charging process is managed
Discharge process is managed
Hold from kinetonucleus and control
Manual core holds control
In batteries in parallel connection module of the present invention, three DC-DC modules of employing all use LLC resonance potentials type topology,
Using DSP digital soft switch algorithm controls.Above topology and algorithm switching loss are low, and energy conversion efficiency is high, algorithm controls spirit
It is living.
4th, battery allocation plan
Recommend 3 battery allocation plans
4.1st, scheme 1：Set of cells is realized using single-unit 12V lead-acid batteries.
1) there is no series connection situation in the battery of each batteries in parallel connection inside modules configuration of this configuration, can be to greatest extent
Avoid the shortcoming of series connection accumulator.
2) in 110kV transforming plant DC power-supply system applications, need to be reached directly using 10 several batteries in parallel connection wired in parallel
The capacity requirement of stream power supply, using the configuration of " N+1 " redundancy, used as redundancy backup, redundant configuration cost is most for 1 module of multi-configuration
It is low.
3) there is batteries in parallel connection module more, the imperfect problem of economy of configuration in the program.
4.2nd, scheme 2：Set of cells realizes that using 2 section 12V lead-acid batteries series connection battery voltage is 24V.
1) this configuration cell voltage is high, and the no-load voltage ratio of DC/DC2 and DC/DC3 is relatively low, and conversion efficiency is higher.
2) capacity of single batteries in parallel connection module is compared and increased 1 times using the situation of single-unit 12V batteries.Become in 110kV
In electric station DC power-supply system application, the capacity requirement of DC source is can reach using 5,6 batteries in parallel connection wired in parallel.5、
6 wired in parallel, using the configuration of " N+1 " redundancy, 1 module of multi-configuration is used as redundancy backup, 20% or so redundant configuration
Cost, redundant configuration moderate cost.
3) 2 batteries series connection, wherein 1 piece of failure, 2 pieces of batteries needs replacings simultaneously, battery integrated cost are more electric than single-unit 12V
Pond scheme is slightly improved.
4.3rd, scheme 3：Set of cells realizes that using 4 section 12V lead-acid batteries series connection battery voltage is 48V.
1) this configuration cell voltage highest, the no-load voltage ratio of DC/DC2 and DC/DC3 are minimum, conversion efficiency highest.
2) capacity of single batteries in parallel connection module is compared and increased 3 times using the situation of single-unit 12V batteries.Become in 110kV
In electric station DC power-supply system application, the capacity requirement of DC source is can reach using 3 batteries in parallel connection wired in parallel.Using
The configuration of " N+1 " redundancy, 1 module of multi-configuration is used as redundancy backup, 30% or so redundant configuration cost, with respect to higher.
3) 4 batteries series connection, wherein 1 piece of failure, 4 pieces of batteries need while replacing, battery integrated cost highest.
Above-mentioned 3 schemes of Integrated comparative, 2 moderate cost of scheme, module number are moderate, it is proposed that preferential to select.
5th, batteries in parallel connection modular structure form allocation plan
Battery, battery monitor unit, energy-storage travelling wave tube, current limiting element, this 4 ingredients of batteries in parallel connection module are wherein
One of or all, can be external according to structure, dimensional requirement, be connected with batteries in parallel connection module by cable, it is also possible to which whole is interior
Put.
6th, batteries in parallel connection module working method is introduced
Module work is divided into three state：S1 exchanges have electricity condition, S2 exchange power failure states, S3 exchanges to have electricity, and module is born excessively
Carry running status.
In S1 states：Module by alternating current power supply be input into (AC220V or AC380V), Jing EMI filter circuits, rectification circuit and
DC voltage 1 (voltage magnitude and alternating current power supply input voltage virtual value phase are transformed to after the process of PFC circuit of power factor correction
When), Jing DC/DC1 are transformed to the output of DC110V or DC220V DC voltages 2 to internal direct current bus, through energy-storage travelling wave tube and limit
Fluid element, output to external dc bus, there is provided load is used.The blood pressure lowering of 1 Jing DC/DC2 of DC voltage conversion simultaneously is DC10-
The DC source of 56V is charged to battery/set of cells.Cell voltage Jing DC/DC3 boosting inverters are that DC110V or DC220V is straight
Stream voltage, output to internal direct current bus, as the Hot Spare of DC/DC1.The VD setting valve of DC/DC3 compares DC/
The VD setting valve of DC1 is lower slightly, thus when alternating current power supply have electricity and load it is normal when, dc bus mainly by
DC/DC1 powers, and DC/DC3 is intended only as Hot Spare, will not external output current.All have inside DC/DC1 and DC/DC3 anti-down
Circuit is filled, can only internally dc bus output current, it is impossible to by internal direct current bus input current.
In S2 states：Exchange dead electricity, DC/DC1 and DC/DC2 do not work, and cell voltage Jing DC/DC3 conversion boostings are
DC110V or DC220V DC voltages, output to internal direct current bus, through energy-storage travelling wave tube and current limiting element, output is straight to outside
Stream bus, there is provided load is used.
In S3 states, exchange has electricity, module overload operation, DC/DC1 and DC/DC3 work simultaneously, while output current
To internal direct current bus, through energy-storage travelling wave tube and current limiting element, output to external dc bus, there is provided load is used.
Module monitors unit, is made up of microcontroller, Acquisition Circuit, control circuit, algorithm, to PFC PFCs
Circuit, DC/DC1, DC/DC2, DC/DC3 etc. are monitored and control, and transmit various signals and order with upper machine communication.
DC/DC1, DC/DC2 and DC/DC3 are topological using LLC resonance potentials type, using DSP digital soft switch algorithm controls
System, completes efficient voltage conversion and energy transmission, and can upload DC/DC module working conditions with module monitors unit communication
Information, battery information etc., and the control of receiving module monitoring unit.
Inside DC/DC2, dsp controller is provided simultaneously with accumulator Charge Management function, controls DC/DC2 filling according to setting
Electric curve is charged management to accumulator.General lead-acid accumulator adopts constant-current charge>Modified constant-voltage charge>It is floating
The three sections of charging curves that charge are charged.Lithium ion battery is charged using Multi-section constant current charging curve.
Energy-storage travelling wave tube, is typically made up of electric power electrochemical capacitor or super capacitor, stores energy at ordinary times, is occurred in load-side
During impact load, there is provided high current in short-term, DC/DC units are prevented because impact load causes overcurrent protection；Meanwhile, it is short in load-side
Lu Shi, as circuit breaker trip needs larger electric current, and needs the lasting regular hour, and DC/DC changers individually cannot be carried
For the circuit breaker trip electric current, DC/DC overcurrent protections may be caused.At this time, high current in short-term is provided by energy-storage travelling wave tube, drive
Circuit breaker trip, after circuit breaker trip, DC/DC modules can continue to normal work, provide working power for normal load.
Current limiting element, is made up of current-limiting circuit and flow equalizing circuit.Load it is normal when, play multiple batteries in parallel connection modules it
Between current balance effect；In load-side short circuit, the energy-storage travelling wave tube velocity of discharge is controlled, (should with the controllable electric flow valuve that can be adjusted
Electric current need to be more than circuit breaker trip electric current) electric discharge, it is ensured that reliable fault trip is realized with minimum energy storage cost.
Battery monitor unit is a selectable unit, is mainly used in configuring the situation of set of cells, for each list in set of cells
The monitoring of the states such as the voltage of batteries, internal resistance, temperature, the charging process control and discharge process control for set of cells provide control
Parameter foundation processed.Meanwhile, data supporting is provided for the estimation of more accurate battery capacity.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
The various modifications made by needing to pay creative work or deformation are still within protection scope of the present invention.
Claims (10)
1. a kind of DC power system with batteries in parallel connection module, is characterized in that：Including Alternating Current Unit, the exchange is matched somebody with somebody
Electric unit is connected to multichannel AC inlet wire on ac bus, provides exchange for several batteries in parallel connection modules parallel with one another
Electricity, the batteries in parallel connection module will provide unidirectional current for dc bus after convert alternating current, and each DC feeder passes through miniature circuit breakers
It is connected on dc bus, from dc bus power taking, to the load supplying of this feeder line；Each batteries in parallel connection module configures one group of electric power storage
Pond, when ac bus power down, batteries in parallel connection module passes through the accumulator power taking for configuring, and to dc bus out-put supply；
The batteries in parallel connection module, including the filter circuit, rectification circuit, PFC circuit of power factor correction being sequentially connected, first
DC/DC changers, energy-storage travelling wave tube and current limiting element, are direct current output by the convert alternating current of input；
The batteries in parallel connection module connects supervising device by respective port, feeds back respective working condition.
2. a kind of DC power system with batteries in parallel connection module as claimed in claim 1, is characterized in that：The PFC work(
The outfan of rate factor correcting circuit connects accumulator by the 2nd DC/DC changers, and the 2nd DC/DC changers are in alternating current power supply
Charge a battery when normal；
By the 3rd DC/DC changers, the DC source boosting inverter that accumulator is input into is 110V or 220V to the accumulator
DC voltage, Jing energy-storage travelling wave tube and current limiting element in parallel with the outfan of a DC/DC changers, output to module outfan,
During normal work, Hot Spare of the 3rd DC/DC changers as a DC/DC changers；During overload, the 3rd DC/DC conversion
Device provides electric current output, with the common bringing onto load of a DC/DC changers.
3. a kind of DC power system with batteries in parallel connection module as claimed in claim 1, is characterized in that：The PFC work(
Rate factor correcting circuit, a DC/DC changers, the 2nd DC/DC changers and the 3rd DC/DC changers are all connected with module monitors
Unit, the monitoring of receiving module monitoring unit, protection, control, and communicated with host computer by module monitors unit.
4. a kind of DC power system with batteries in parallel connection module as claimed in claim 1, is characterized in that：The accumulator
Battery monitor unit is connected with, voltage, temperature, internal resistance and the current information of accumulator is gathered, there is provided battery cell monitoring and protection.
5. a kind of DC power system with batteries in parallel connection module as claimed in claim 1, is characterized in that：Described first
DC/DC changers, the 2nd DC/DC changers and the 3rd DC/DC changers are using LLC resonance potentials type topology.
6. a kind of DC power system with batteries in parallel connection module as claimed in claim 1, is characterized in that：The module prison
Control unit is PFC circuit of power factor correction, a DC/DC changers, the 2nd DC/DC changers and the 3rd DC/DC changers
Output over-voltage protection, output low-voltage protection, output overcurrent protection, overheat protector and outfan short-circuit protection are provided；
Or the module monitors unit monitoring PFC circuit of power factor correction, a DC/DC changers, the 2nd DC/DC changers
Input voltage, output voltage and output current with the 3rd DC/DC changers.
7. the method for work based on the DC power system as any one of claim 1-6, is characterized in that：Have in exchange
When electricity condition and normal load, the filtered circuit of exchange input, rectification circuit and PFC circuit of power factor correction are converted after processing
For DC voltage A, the first DC/DC changers of Jing are transformed to 110V or 220V direct voltage outputs to internal direct current bus, pass through
Energy-storage travelling wave tube and current limiting element, output to external dc bus, there is provided load is used, while the 2nd DC/DC of DC voltage A Jing become
Parallel operation conversion blood pressure lowering is charged to accumulator for the DC source of 10-56V, the 3rd DC/DC converter boosts of cell voltage Jing
It is transformed to 110V or 220V DC voltages, output to internal direct current bus, as the Hot Spare of a DC/DC changers.
8. the method for work based on the DC power system as any one of claim 1-6, is characterized in that：Lose in exchange
During electricity condition, a DC/DC changers and the 2nd DC/DC changers do not work, the conversion of the 3rd DC/DC changers of cell voltage Jing
Boost as 110V or 220V DC voltages, output to internal direct current bus, through energy-storage travelling wave tube and current limiting element, output is to outside
Dc bus, there is provided load is used.
9. the method for work based on the DC power system as any one of claim 1-6, is characterized in that：Have in exchange
Electricity, but during module overload operation, a DC/DC changers and the 3rd DC/DC changers are worked simultaneously, while output current is arrived
Internal direct current bus, through energy-storage travelling wave tube and current limiting element, output to external dc bus, there is provided load is used.
10. method of work as claimed in any one of claims 7-9, is characterized in that：The 2nd DC/DC changers are according to setting
Fixed charging curve is charged management to accumulator；
Or the accumulator be lead-acid accumulator when, using constant-current charge, three sections of charging curves of modified constant-voltage charge and floating charging
It is charged；When accumulator is lithium ion battery, it is charged using Multi-section constant current charging curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146024.3A CN106532889A (en) | 2016-12-13 | 2016-12-13 | Direct-current power system having parallel battery modules and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146024.3A CN106532889A (en) | 2016-12-13 | 2016-12-13 | Direct-current power system having parallel battery modules and method |
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| 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 |
| CN107370201A (en) * | 2017-06-29 | 2017-11-21 | 杭州奥能电源设备有限公司 | DC power system based on battery connection in series-parallel combination |
| CN107404149A (en) * | 2017-09-04 | 2017-11-28 | 广州泓淮能源科技有限公司 | A kind of storage battery parallel power supply system based on straight-flow system |
| CN107546823A (en) * | 2017-09-26 | 2018-01-05 | 深圳市科信通信技术股份有限公司 | The power supply system for communications that a kind of battery series-parallel connection uses |
| CN107591832A (en) * | 2017-10-17 | 2018-01-16 | 深圳市泰昂能源科技股份有限公司 | Energy storage managing device and energy storage monitor system |
| CN107872092A (en) * | 2017-10-31 | 2018-04-03 | 湖南文理学院 | A kind of distributed batteries in parallel connection management system |
| CN108110735A (en) * | 2018-02-08 | 2018-06-01 | 重庆泊津科技有限公司 | Lithium iron phosphate storage battery direct current emergency power system |
| CN109494866A (en) * | 2018-10-16 | 2019-03-19 | 江苏万邦微电子有限公司 | A kind of power-supply management system |
| CN109831016A (en) * | 2019-03-28 | 2019-05-31 | 深圳市泰昂能源科技股份有限公司 | A kind of communication power device and system |
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| CN110011408A (en) * | 2019-05-21 | 2019-07-12 | 国网福建省电力有限公司宁德供电公司 | A kind of moving emergency power-supply system and its working 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 |
| CN111049245A (en) * | 2019-11-25 | 2020-04-21 | 国网浙江省电力有限公司湖州供电公司 | High-reliability direct-current power supply for transformer substation and detection method |
| CN111223281A (en) * | 2018-11-23 | 2020-06-02 | 北京九州恒盛电力科技有限公司 | Prevent distribution room data acquisition system of outage |
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| CN113422363A (en) * | 2021-06-30 | 2021-09-21 | 郑州易能科技有限公司 | Intelligent parallel direct-current power supply management system |
| CN114069592A (en) * | 2021-10-21 | 2022-02-18 | 南京吉纳电子科技有限公司 | Parallel current sharing method and system for direct-current power supplies |
| CN114270657A (en) * | 2020-07-16 | 2022-04-01 | 华为数字能源技术有限公司 | Battery pack and energy storage system |
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| CN107370201A (en) * | 2017-06-29 | 2017-11-21 | 杭州奥能电源设备有限公司 | DC power system based on battery connection in series-parallel combination |
| CN107370201B (en) * | 2017-06-29 | 2019-12-31 | 杭州奥能电源设备有限公司 | Direct-current power supply system based on storage battery series-parallel combination |
| 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 |
| CN107404149A (en) * | 2017-09-04 | 2017-11-28 | 广州泓淮能源科技有限公司 | A kind of storage battery parallel power supply system based on straight-flow system |
| CN107546823A (en) * | 2017-09-26 | 2018-01-05 | 深圳市科信通信技术股份有限公司 | The power supply system for communications that a kind of battery series-parallel connection uses |
| CN107591832A (en) * | 2017-10-17 | 2018-01-16 | 深圳市泰昂能源科技股份有限公司 | Energy storage managing device and energy storage monitor system |
| CN107872092A (en) * | 2017-10-31 | 2018-04-03 | 湖南文理学院 | A kind of distributed batteries in parallel connection management system |
| CN109830962A (en) * | 2017-11-23 | 2019-05-31 | 维纳尔电气系统有限公司 | Bus power-supply device |
| CN108110735A (en) * | 2018-02-08 | 2018-06-01 | 重庆泊津科技有限公司 | Lithium iron phosphate storage battery direct current emergency power system |
| CN109494866A (en) * | 2018-10-16 | 2019-03-19 | 江苏万邦微电子有限公司 | A kind of power-supply management system |
| CN111223281A (en) * | 2018-11-23 | 2020-06-02 | 北京九州恒盛电力科技有限公司 | Prevent distribution room data acquisition system of outage |
| CN109831016A (en) * | 2019-03-28 | 2019-05-31 | 深圳市泰昂能源科技股份有限公司 | A kind of communication power device and system |
| CN110011408A (en) * | 2019-05-21 | 2019-07-12 | 国网福建省电力有限公司宁德供电公司 | A kind of moving emergency power-supply system and its working method |
| CN110011408B (en) * | 2019-05-21 | 2024-03-08 | 国网福建省电力有限公司宁德供电公司 | Mobile emergency power supply system and working method thereof |
| 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 |
| CN111049245B (en) * | 2019-11-25 | 2022-01-07 | 国网浙江省电力有限公司湖州供电公司 | High-reliability direct-current power supply for transformer substation and detection method |
| CN111049245A (en) * | 2019-11-25 | 2020-04-21 | 国网浙江省电力有限公司湖州供电公司 | High-reliability direct-current power supply for transformer substation and detection method |
| CN114270657A (en) * | 2020-07-16 | 2022-04-01 | 华为数字能源技术有限公司 | Battery pack and energy storage system |
| EP4167433A4 (en) * | 2020-07-16 | 2023-11-15 | Huawei Digital Power Technologies Co., Ltd. | Battery assembly and energy storage system |
| CN112821539A (en) * | 2020-12-31 | 2021-05-18 | 科华恒盛股份有限公司 | Auxiliary power supply device and power supply system |
| CN112821539B (en) * | 2020-12-31 | 2024-01-02 | 厦门科华数能科技有限公司 | Auxiliary power supply device and power supply system |
| CN113394765A (en) * | 2021-06-11 | 2021-09-14 | 国网山东省电力公司莱芜供电公司 | Parallel direct-current power supply system |
| CN113422363A (en) * | 2021-06-30 | 2021-09-21 | 郑州易能科技有限公司 | Intelligent parallel direct-current power supply management system |
| CN114069592A (en) * | 2021-10-21 | 2022-02-18 | 南京吉纳电子科技有限公司 | Parallel current sharing method and system for direct-current power supplies |
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