CN207588707U - A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access - Google Patents
A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access Download PDFInfo
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- CN207588707U CN207588707U CN201721714227.8U CN201721714227U CN207588707U CN 207588707 U CN207588707 U CN 207588707U CN 201721714227 U CN201721714227 U CN 201721714227U CN 207588707 U CN207588707 U CN 207588707U
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Abstract
A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access, including the two-way DC/DC units of unidirectionally boost DC/DC converters, tandem type, the unidirectional boosting DC/DC converters include power supply U1, inductance L1, switching tube S1, diode DO, capacitance CO；Power supply U1Anode connection inductance L1One end, inductance L1Other end connecting valve pipe S1Drain electrode, the two-way DC/DC units side of tandem type, power supply U1Cathode connecting valve pipe S1Source electrode, capacitance COOne end, capacitance COOther end connection diode DOCathode, diode DOAnode connects the two-way DC/DC units opposite side of tandem type；The two-way DC/DC units of tandem type are multiple, and multiple two-way DC/DC units of tandem type are in series or in parallel.The utility model is by improving the structures of two-way DC/DC converters, propose a kind of two-way DC/DC units topology of tandem type and the Constructed wetlands and implementation of series hybrid MPC, energy-storage units series connection access is realized, there is simple structure, convenient control.
Description
Technical field
The utility model is related to a kind of DC/DC converters, specifically a kind of series connection suitable for energy-storage units access mixes
Mould assembly multiport DC/DC converters.
Background technology
With the getting worse of the global problems such as energy crisis, greenhouse effects and atmosphere pollution, photovoltaic generation, fuel electricity
The new energy power generation technologies such as pond power generation have obtained extensive concern and fast development, the grid-connected power generation system energy containing energy-storage units
The generated output of enough smooth new energy micro batteries, improves system grid connection stability.Existing parallel connection mixed type multiport converter
Energy-storage units are generally connected in the form of in parallel with boosting DC/DC converters or dc bus in scheme, and traditional is parallel
Although structure can solve the problems, such as micro battery generated output and it is grid-connected when system stability, due to parallel structure
Reason makes energy-storage system that will carry out electric energy conversion twice when charging every time, causes waste of energy and utilization rate of electrical is low etc. asks
Topic, in addition parallel structure can also increase the complexity of system design cost and controller design.Therefore, existing parallel connection is improved
Formula structure is for reducing energy-storage system energy conversion times, improving system capacity utilization rate, reduction system design cost and optimization
Controller design is of great significance.
Invention content
In view of the above shortcomings of the prior art, the utility model emphasis solves energy caused by energy-storage units parallel structure
A kind of problems such as conversion times are more, and capacity usage ratio is low, it is proposed that series hybrid multiport suitable for energy-storage units access
DC/DC converters.The utility model is by improving the structures of two-way DC/DC converters, it is proposed that a kind of two-way DC/DC of tandem type
The Constructed wetlands and implementation of unit topology and series hybrid MPC realize energy-storage units series connection access, have structure
Simply, the advantages that easy to control, compared with conventional parallel mixed type MPC, the program can significantly reduce the energy of energy-storage units
Conversion times are measured, so as to reduce energy loss, improve the utilization rate of energy.
The technical solution that the utility model is taken is：
A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access, including the DC/DC that unidirectionally boosts
The two-way DC/DC units of converter, tandem type, the unidirectional boosting DC/DC converters include power supply U1, inductance L1, switching tube S1、
Diode DO, capacitance CO；Power supply U1Anode connection inductance L1One end, inductance L1Other end connecting valve pipe S1Drain electrode, tandem type are double
To DC/DC units side, power supply U1Cathode connecting valve pipe S1Source electrode, capacitance COOne end, capacitance COOther end connection diode DO
Cathode, diode DOAnode connects the two-way DC/DC units opposite side of tandem type；
The two-way DC/DC units of tandem type include energy-storage units UB, switching tube S2, switching tube S3, diode D1, two poles
Pipe D2；
Switching tube S2Drain electrode connection diode D1Anode, diode D1Cathode connecting valve pipe S3Drain electrode, switching tube S3Source electrode
Connect diode D2Cathode, diode D2Anode connecting valve pipe S2Source electrode, energy-storage units UBCathode connecting diode D1Cathode, storage
It can unit UBCathode connection diode D2Anode；
The two-way DC/DC units of tandem type are multiple, and multiple two-way DC/DC units of tandem type are in series or in parallel.String
The two-way DC/DC units of connection type are by three switching tubes：Switching tube S2, switching tube S3With two diodes：Diode D1, diode D2,
Respectively constitute charging paths, discharge paths and the bypass of two-way DC/DC converters；
As switching tube S1、S2When being turned off, diode D1、D2Conducting, energy-storage units UBIn charged state；
As switching tube S1、S2Conducting, diode D1、D2Shutdown, energy-storage units are in discharge condition；
As switching tube S1、S2Only there are one during switching tube conducting, energy-storage units are bypassed, and the energy being not involved in circuit turns
It changes；In series hybrid MPC, by by the two-way DC/DC units of multiple tandem types carry out respectively it is in series or in parallel after, again with list
It connects to boosting DC/DC converters, can realize that N (N >=1) a energy-storage units access simultaneously.
A kind of street lamp illumination system, the unidirectional boosting DC/DC converters of photovoltaic cell connection, the unidirectional DC/DC converters that boost
It is connect with the two-way DC/DC units of tandem type, the two-way DC/DC units connection dc bus of tandem type；
Dc bus connects two-way DC/AC converters, and two-way DC/AC converters connect AC network；
Dc bus connects DC/AC converters, DC/AC converters connection AC load；
Dc bus connects DC/DC converters, DC/DC converters connection DC load.
A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access of the utility model have such as
Under
Advantageous effect：
1. energy-storage units are linked into the form of connecting in unidirectional boosting DC/DC converters by the utility model, make energy storage
Unit forms a complete power electronic system by the two-way DC/DC units of tandem type and unidirectional boosting DC/DC converters, subtracts
The design cost of converter is lacked, while the design difficulty of controller can also be reduced, made centralized Control simpler.
2. energy-storage units and unidirectional boosting DC/DC converters can be cascaded by the two-way DC/DC units of tandem type.Energy storage
In charging process, electric energy can be directly transformed by the DC/DC converters that unidirectionally boost in energy-storage units unit, reduce energy by
Boosting DC/DC converters are transmitted to load, then energy is transformed into this roundabout process in energy-storage units by loading, thus reduce
The conversion times of energy improve the utilization rate of energy.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is conventional parallel mixed type MPC functional block diagrams.
Fig. 2 is the utility model series hybrid MPC functional block diagrams.
Fig. 3 is that the utility model is formed a string applied to the two-way DC/DC units parallel connection of tandem type N number of in Boost
Join mixed type MPC schematic diagrams.
The utility model connects to be formed a string applied to N number of two-way DC/DC units of tandem type in Boost during Fig. 4
Join mixed type MPC schematic diagrams.
Fig. 5 is that the utility model is applied to 1 tandem type in Boost, one MPC principles of two-way DC/DC units formation
Figure.Fig. 6 is the two-way DC/DC element circuits figure of single tandem type described in the utility model.
Specific embodiment
A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access, including the DC/DC that unidirectionally boosts
The two-way DC/DC units of converter, tandem type, the unidirectional boosting DC/DC converters include power supply U1, inductance L1, switching tube S1、
Diode DO, capacitance CO；Power supply U1Anode connection inductance L1One end, inductance L1Other end connecting valve pipe S1Drain electrode, tandem type are double
To DC/DC units side, power supply U1Cathode connecting valve pipe S1Source electrode, capacitance COOne end, capacitance COOther end connection diode DO
Cathode, diode DOAnode connects the two-way DC/DC units opposite side of tandem type；The two-way DC/DC units of tandem type include storage
It can unit UB, switching tube S2, switching tube S3, diode D1, diode D2；
Switching tube S2Drain electrode connection diode D1Anode, diode D1Cathode connecting valve pipe S3Drain electrode, switching tube S3Source electrode
Connect diode D2Cathode, diode D2Anode connecting valve pipe S2Source electrode, energy-storage units UBCathode connecting diode D1Cathode, storage
It can unit UBCathode connection diode D2Anode；
The two-way DC/DC units of tandem type are multiple, and multiple two-way DC/DC units of tandem type are in series or in parallel.
The two-way DC/DC units of tandem type are by three switching tubes：Switching tube S2, switching tube S3With two diodes：Diode
D1, diode D2, respectively constitute charging paths, discharge paths and the bypass of two-way DC/DC converters；
As switching tube S1、S2When being turned off, diode D1、D2Conducting, energy-storage units UBIn charged state；DC micro-electric source
When charging to energy-storage units, directly charged by series hybrid MPC to energy-storage units, do not need to be converted to DC bus-bar voltage
It is charged again by two-way DC/DC converters to energy-storage units afterwards, thus reduces the conversion of intergrade energy, improve energy utilization
Efficiency.
As switching tube S1、S2Conducting, diode D1、D2Shutdown, energy-storage units are in discharge condition；
As switching tube S1、S2Only there are one during switching tube conducting, energy-storage units are bypassed, and the energy being not involved in circuit turns
It changes；In series hybrid MPC, by by the two-way DC/DC units of multiple tandem types carry out respectively it is in series or in parallel after, again with list
It connects to boosting DC/DC converters, can realize that N (N >=1) a energy-storage units access simultaneously.
A kind of street lamp illumination system, the unidirectional boosting DC/DC converters of photovoltaic cell connection, the unidirectional DC/DC converters that boost
It is connect with the two-way DC/DC units of tandem type, the two-way DC/DC units connection dc bus of tandem type；
Dc bus connects two-way DC/AC converters, and two-way DC/AC converters connect AC network；
Dc bus connects DC/AC converters, DC/AC converters connection AC load；
Dc bus connects DC/DC converters, DC/DC converters connection DC load.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 and Fig. 2 be respectively conventional parallel mixed type MPC functional block diagrams and the utility model proposes series hybrid
MPC functional block diagrams, as shown in Figure 1 energy-storage units be connected directly with dc bus, form one kind with unidirectional boosting DC/DC converters
Parallel structure, in energy-storage units charging process, the electric energy in DC micro-electric source first will be electric by the DC/DC converters that boost
Pressure is increased to DC bus-bar voltage, then redundancy electric energy is stored into storage by the two-way DC/DC converter in parallel with dc bus
In energy unit, thus DC micro-electric source will convert in energy-storage units charging process by electric energy twice, electric energy conversion times
It is more, the problems such as cause waste of energy, utilization rate of electrical low.Become according to problem above the utility model by improving two-way DC/DC
Parallel operation structure proposes a kind of series hybrid multiport MPC, as shown in Fig. 2, series hybrid MPC realizes unidirectional boosting
DC/DC converters are connected with two-way DC/DC converters, reduce DC micro-electric source in energy-storage units charging process, electric energy
DC bus-bar voltage this process is converted to, so as to reduce electric energy conversion times, improves utilization rate of electrical.
The utility model is illustrated in figure 3 applied to N number of two-way DC/DC units parallel connection shape of tandem type in Boost
Into a series hybrid MPC schematic diagrams, the tandem type mixed type MPC is by will be after the two-way DC/DC units parallel connection of N number of tandem type
It connects again with Boost, forms a series hybrid MPC with N+2 port, series hybrid MPC can be with
It realizes that each energy-storage units of N and 1 new energy micro battery access simultaneously simultaneously, can work independently between each energy-storage units, mutually
It does not interfere.Series hybrid MPC can not only reduce energy-storage units in charging process since electric energy conversion times are more, cause
Waste of energy problem, and the form of N number of energy-storage units parallel connection is greatly improved into system power capacity and system grid connection is steady
It is qualitative.
The utility model is illustrated in figure 4 applied to the two-way DC/DC units series connection shape of tandem type N number of in Boost
Into a series hybrid MPC schematic diagrams, series hybrid MPC passes through the two-way DC/DC units of N number of tandem type and Boost is electric
Road is connected, and forms a series hybrid MPC with N+2 port, and N number of energy-storage units can simultaneously or separately be filled
Electric discharge.
It is illustrated in figure 5 the utility model and forms one applied to the two-way DC/DC units of 1 tandem type in Boost
MPC schematic diagrams, the circuit can be divided into three operation modes：Energy-storage units charging mode, energy-storage units electric discharge mode and energy storage list
Member is bypassed mode；
Mode one：Switch S1、S2、S3It is turned off, at this time diode D1、D2、DOIt is both turned on, power supply U1By inductance L to storage
It can unit UBCharging, while capacitance COCharging, to load RLPower supply.
Mode two：Switch S1Shutdown, S2、S3Conducting, diode D1、D2Shutdown, DOConducting, energy-storage units are in electric discharge shape
State, power supply U1And UBSimultaneously to capacitance COCharging.
Mode three：The mode can be divided into two kinds of working condition：(1) S is switched1Shutdown, S2Conducting, S3Shutdown (or S2It closes
Disconnected, S3Conducting), diode D1(or D2) be connected, DOIt is connected, energy-storage units are in and are bypassed state at this time, load by power supply U1It is single
Solely power supply；(2) S is switched1Conducting, S2、S3It is turned off, diode D1、D1、DOIt is turned off, inductance L charges at this time, COIt is negative to discharge
Power supply is carried, energy-storage units still in state is bypassed, convert by the energy being not involved in circuit.
In conclusion the utility model realizes energy-storage units series connection access by the two-way DC/DC units of tandem type, propose
A kind of series hybrid MPC topological structures and its building method, series hybrid MPC effectively solve traditional energy storage
The problem of unit is more by energy conversion times caused by two-way DC/DC converters parallel structure, and capacity usage ratio is low.This
Suitable for the direct-current grid containing energy-storage units, above-mentioned implementation example illustrates simple utility model just for the sake of operation principle
And the series hybrid MPC built, it in practical applications, can be slightly modified to this programme according to actual conditions, reach optimization
Efficiency and cost-effective purpose.
It is to illustrate the utility model example that the above-mentioned implementation example of the utility model, which is only, and is not to this
The restriction of the embodiment of utility model.For those of ordinary skill in the art, on the basis of the above description also
Other various forms of variations and variation can be made.Here all embodiments can not be exhaustive.It is every to belong to this
The technical solution changes and variations that derived from of utility model still in the scope of protection of the utility model it
Row.
Claims (1)
1. a kind of series hybrid multiport DC/DC converters suitable for energy-storage units access, including unidirectionally boosting, DC/DC becomes
The two-way DC/DC units of parallel operation, tandem type, it is characterised in that：The unidirectional boosting DC/DC converters include power supply U1, inductance L1、
Switching tube S1, diode DO, capacitance CO；Power supply U1Anode connection inductance L1One end, inductance L1Other end connecting valve pipe S1Drain electrode,
The two-way DC/DC units side of tandem type, power supply U1Cathode connecting valve pipe S1Source electrode, capacitance COOne end, capacitance COThe other end connects
Diode DOCathode, diode DOAnode connects the two-way DC/DC units opposite side of tandem type；The two-way DC/DC units of tandem type
Including energy-storage units UB, switching tube S2, switching tube S3, diode D1, diode D2；Switching tube S2Drain electrode connection diode D1Sun
Pole, diode D1Cathode connecting valve pipe S3Drain electrode, switching tube S3Source electrode connection diode D2Cathode, diode D2Anode connection is opened
Close pipe S2Source electrode, energy-storage units UBCathode connecting diode D1Cathode, energy-storage units UBCathode connection diode D2Anode；
The two-way DC/DC units of tandem type are multiple, and multiple two-way DC/DC units of tandem type are in series or in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721714227.8U CN207588707U (en) | 2017-12-11 | 2017-12-11 | A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721714227.8U CN207588707U (en) | 2017-12-11 | 2017-12-11 | A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access |
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| CN207588707U true CN207588707U (en) | 2018-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947572A (en) * | 2017-12-11 | 2018-04-20 | 三峡大学 | A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access |
| CN109375605A (en) * | 2018-09-13 | 2019-02-22 | 南京信息工程大学 | A kind of energy stream Integrated TT&C System and control method |
-
2017
- 2017-12-11 CN CN201721714227.8U patent/CN207588707U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947572A (en) * | 2017-12-11 | 2018-04-20 | 三峡大学 | A kind of series hybrid multiport DC/DC converters suitable for energy-storage units access |
| CN107947572B (en) * | 2017-12-11 | 2019-12-03 | 三峡大学 | A kind of series hybrid multiport DC/DC converter suitable for energy-storage units access |
| CN109375605A (en) * | 2018-09-13 | 2019-02-22 | 南京信息工程大学 | A kind of energy stream Integrated TT&C System and control method |
| CN109375605B (en) * | 2018-09-13 | 2020-04-21 | 南京信息工程大学 | Energy flow comprehensive measurement and control system and control method |
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Granted publication date: 20180706 Termination date: 20191211 |