CN112072914B - Three-port direct current converter for hybrid energy storage - Google Patents

Three-port direct current converter for hybrid energy storage Download PDF

Info

Publication number
CN112072914B
CN112072914B CN202010708830.5A CN202010708830A CN112072914B CN 112072914 B CN112072914 B CN 112072914B CN 202010708830 A CN202010708830 A CN 202010708830A CN 112072914 B CN112072914 B CN 112072914B
Authority
CN
China
Prior art keywords
port
switching tube
collector
emitter
energy storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010708830.5A
Other languages
Chinese (zh)
Other versions
CN112072914A (en
Inventor
牛利勇
张维戈
吴健
张言茹
李景新
齐洪峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Jiaotong University
CRRC Industry Institute Co Ltd
Original Assignee
Beijing Jiaotong University
CRRC Industry Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Jiaotong University, CRRC Industry Institute Co Ltd filed Critical Beijing Jiaotong University
Priority to CN202010708830.5A priority Critical patent/CN112072914B/en
Publication of CN112072914A publication Critical patent/CN112072914A/en
Application granted granted Critical
Publication of CN112072914B publication Critical patent/CN112072914B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs

Abstract

The invention discloses a three-port direct current converter for hybrid energy storage. The converter has a completely symmetrical structure, energy among the three ports can flow at will, and the control mode is simple and easy to realize. The converter can be used for a hybrid energy storage system formed by typical energy storage elements such as batteries, super capacitors and the like, wherein two ports are used for connecting the energy storage elements, and the third port is used for connecting a common direct current bus, so that an energy exchange function between the energy storage elements or between the energy storage elements and the common direct current bus is realized.

Description

Three-port direct current converter for hybrid energy storage
Technical Field
The invention relates to a three-port direct-current converter, in particular to a three-port direct-current converter for hybrid energy storage.
Background
The multi-port direct current converter can simultaneously manage and control power of a plurality of input and output sources, has the advantages of high integration level, high efficiency, low cost and the like, and is concerned in the fields of new energy power generation, hybrid energy storage systems and the like. The three-port converter is a typical multi-port converter and has wide application prospects in systems of hybrid energy storage, photovoltaic power generation, hybrid electric vehicle power supply, space satellite power supply and the like.
Three-port converter topologies can be divided into two broad categories, isolated and non-isolated. The isolated topology can realize electrical isolation and high-voltage ratio voltage conversion, but has the defects of large volume, low efficiency, serious electromagnetic interference and the like. The non-isolated type has the advantages of simple topology and high efficiency, but the voltage variation range is smaller. A three-port converter formed by three bidirectional buck-boost switch units in a cascade combination mode eliminates an intermediate bus capacitor, can reduce the size, weight and cost of the converter, realizes single-stage buck-boost power conversion among ports, and greatly improves the conversion efficiency and power density of the converter. However, the inductors of the three ports in the topology are connected in a star-shaped manner, and under the condition of single-input double-output or double-input single-output, the current of one inductor is the sum of the currents of the other two inductors, and because a symmetrical structure is adopted, the other two inductors have larger margins; secondly, because there is not the anti-parallel diode in switch tube department, two switch tubes on the single bridge arm adopt complementary pulse drive that switches on, have the dead zone problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a three-port direct current converter for hybrid energy storage. The converter adopts a completely symmetrical non-isolated structure, energy can flow between the three ports at will, and the converter has the advantages of simple structure, flexible control, small volume, high efficiency, large voltage variation range and the like.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a three-port dc converter for hybrid energy storage, in a fully symmetric configuration, comprising: the three non-isolated ports are specifically a port 1, a port 2 and a port 3, each port adopts a half-bridge structure, the three ports are connected with each other through independent inductors, each port can be used as an input port or an output port, but at least one input port and one output port are required.
On the basis of the above scheme, the port 1 includes: the capacitor C1, the switch tube Q11, the switch tube Qa and the switch tube Q12;
the emitter of the switching tube Q11 is connected with the emitter of the switching tube Qa, the collector of the switching tube Qa is connected with the collector of the switching tube Q12, the collector of the switching tube Q11 is connected with one end of the capacitor C1, and the other end of the capacitor C1 is connected with the emitter of the switching tube Q12.
On the basis of the above scheme, the port 2 includes: the capacitor C2, the switch tube Q21, the switch tube Qb and the switch tube Q22;
the emitter of the switching tube Q21 is connected with the emitter of the switching tube Qb, the collector of the switching tube Qb is connected with the collector of the switching tube Q22, the collector of the switching tube Q21 is connected with one end of a capacitor C2, and the other end of the capacitor C2 is connected with the emitter of the switching tube Q22.
On the basis of the above scheme, the port 3 includes: the capacitor C3, the switch tube Q31, the switch tube Qc and the switch tube Q32;
the emitter of the switching tube Q31 is connected with the emitter of the switching tube Qc, the collector of the switching tube Qc is connected with the collector of the switching tube Q32, the collector of the switching tube Q31 is connected with one end of the capacitor C3, and the other end of the capacitor C3 is connected with the emitter of the switching tube Q32.
On the basis of the above scheme, the independent inductor includes: independent inductance L1, independent inductance L2 and independent inductance L3.
In addition to the above configuration, the collector of the switching tube Qa is further connected to the positive electrode of the independent inductor L2 and the positive electrode of the independent inductor L1, the negative electrode of the independent inductor L1 is connected to the negative electrode of the independent inductor L3 and the collector of the switching tube Qb, the negative electrode of the independent inductor L2 is connected to the positive electrode of the independent inductor L3 and the collector of the switching tube Qc, and the emitter of the switching tube Q12 is further connected to the emitter of the switching tube Q22 and the emitter of the switching tube Q32.
On the basis of the scheme, the three-port direct-current converter for hybrid energy storage comprises three working modes, wherein the first working mode is a single-input single-output mode, and one port does not work; the second working mode is a single-input double-output module type, wherein the energy of one port is more than 0, and the energy of the other two ports is less than 0; the third working mode is a double-input single-output mode, wherein the energy of two ports is more than 0, and the energy of the other port is less than 0.
Drawings
The invention has the following drawings:
fig. 1 a three-port dc converter.
Fig. 2 is a schematic energy flow diagram.
Fig. 3 is a power flow diagram for three modes of operation.
Fig. 4SIDO mode operating waveforms.
FIG. 5 is an equivalent circuit diagram of each working mode of the SIDO mode.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The three-port dc converter topology of the present invention is shown in fig. 1.
Three ports of the converter all adopt a half-bridge structure, and an upper bridge arm adopts a mode that emitting electrodes of switching tubes are connected in series so as to ensure reverse blocking capability. When the output port works, the reverse series switch tube (Qa, Qb or Qc) of the bridge arm on the port keeps on, and the switch tube keeps off under other conditions.
As shown in FIG. 1, the converter includes 3 non-isolated ports, V1-V3 are the voltages of ports 1-3, respectively. Energy transmission is carried out between every two of the three ports through independent inductors, and because the topological structure of the circuit is completely symmetrical, the ports 1, 2 and 3 can be used as input or output ports at will, but at least one input port and one output port are required. The converter energy flow diagram is shown in fig. 2, and the transmission direction and the transmission amount of energy can be changed according to the working state and the duty ratio of the switching tube.
If the energy at the input port of the converter is marked as positive and the energy at the output port is marked as negative, then without considering losses, it can be known from the principle of energy conservation:
P1+P2+P3＝0 (1)
wherein P is1Is the energy of port 1, P2Is the energy of port 2, P3Is the energy of port 3.
According to the difference of the energy flow direction of each port, the converter has the following three operation modes:
(1) one of the ports is inoperative, i.e. P1Or P2Or P3Equal to 0, defined as a Single Input Single Output (SISO) mode, and fig. 3(a) is a power flow diagram of a SISO mode.
(2) When P is present1、P2、P3When none of the signals is equal to 0, one of the signals is greater than 0, and the other two signals are less than 0, the Single Input Dual Output (SIDO) mode is defined, and fig. 3(b) is a power flow diagram of the SIDO mode.
When P is present1、P2、P3When none of the signals is equal to 0, two of the signals are greater than 0, and the other one is less than 0, a Dual Input Single Output (DISO) mode is defined, and fig. 3(c) is a power flow diagram of the DISO mode.
Because the circuit topological structure of the converter is symmetrical, unidirectional working mode analysis is carried out, and the obtained conclusion is still general.
(1) SISO mode
In the SISO mode shown in fig. 3(a), port 1 is input, port 2 is output, and port 3 is inactive. At this time, Qa and Qc are turned off, Qb is turned through, the inductance value is equivalent to 2/3 of a single inductor, and the circuit is equivalent to a cascade type buck-boost circuit.
(2) SIDO or DISO mode
In the SIDO mode shown in fig. 3(b), port 1 is an input, and ports 2 and 3 are outputs. Qa is off, Qb and Qc are on, and the operating waveform of the converter is shown in FIG. 4, where UGS11、UGS22、UGS32Are respectively Q11、Q22、Q32With a duty ratio of D11、D22、D32；iL1、iL2、iL3Are respectively an inductance L1、L2、L3The current of (2). In a switching period, 4 working modes are provided, and a simplified mode equivalent circuit diagram is shown in fig. 5.
When the converter works in a steady state, the voltage relation is as follows:
Figure BDA0002595806930000051
V1inrefer to the switch tube Q in FIG. 1aVoltage V at the junction of the collector of (a) and the collector of the switching tube Q121in＝D11*V1。
In the DISO mode shown in fig. 3(c), ports 1 and 2 are input, and port 3 is output. Qa, Qb are turned off, Qc is turned on, Q11、Q21、Q32Respectively is D11、D21、D32Is provided with
Figure BDA0002595806930000052
Or
Figure BDA0002595806930000053
V2inRefers to the voltage, V, at the junction of the collector of the switch tube Qb and the collector of the switch tube Q222in＝D21*V2。
Those not described in detail in this specification are within the skill of the art.

Claims (4)

1. A three-port dc converter for hybrid energy storage, in a fully symmetrical configuration, comprising: three non-isolated ports, specifically, a port 1, a port 2 and a port 3, wherein each port adopts a half-bridge structure, every two of the three ports are connected through an independent inductor, each port can be used as an input or output port, but at least one input port and one output port are required;
the port 1 includes: the capacitor C1, the switch tube Q11, the switch tube Qa and the switch tube Q12;
the emitter of the switching tube Q11 is connected with the emitter of the switching tube Qa, the collector of the switching tube Qa is connected with the collector of the switching tube Q12, the collector of the switching tube Q11 is connected with one end of a capacitor C1, and the other end of the capacitor C1 is connected with the emitter of the switching tube Q12;
the port 2 includes: the capacitor C2, the switch tube Q21, the switch tube Qb and the switch tube Q22;
the emitter of the switching tube Q21 is connected with the emitter of the switching tube Qb, the collector of the switching tube Qb is connected with the collector of the switching tube Q22, the collector of the switching tube Q21 is connected with one end of a capacitor C2, and the other end of the capacitor C2 is connected with the emitter of the switching tube Q22;
the port 3 includes: the capacitor C3, the switch tube Q31, the switch tube Qc and the switch tube Q32;
the emitter of the switching tube Q31 is connected with the emitter of the switching tube Qc, the collector of the switching tube Qc is connected with the collector of the switching tube Q32, the collector of the switching tube Q31 is connected with one end of the capacitor C3, and the other end of the capacitor C3 is connected with the emitter of the switching tube Q32.
2. The three-port dc converter for hybrid energy storage according to claim 1, wherein the independent inductors comprise: independent inductance L1, independent inductance L2 and independent inductance L3.
3. The three-port dc converter for hybrid energy storage according to claim 2, wherein the collector of the switching tube Qa is further connected to the positive electrode of the independent inductor L2 and the positive electrode of the independent inductor L1, the negative electrode of the independent inductor L1 is connected to the negative electrode of the independent inductor L3 and the collector of the switching tube Qb, the negative electrode of the independent inductor L2 is connected to the positive electrode of the independent inductor L3 and the collector of the switching tube Qc, and the emitter of the switching tube Q12 is further connected to the emitter of the switching tube Q22 and the emitter of the switching tube Q32, respectively.
4. The three-port dc converter for hybrid energy storage according to claim 1, wherein the three-port dc converter for hybrid energy storage comprises three operation modes, a first operation mode being a single-input single-output mode in which one port is not operated; the second working mode is a single-input double-output module type, wherein the energy of one port is more than 0, and the energy of the other two ports is less than 0; the third working mode is a double-input single-output mode, wherein the energy of two ports is more than 0, and the energy of the other port is less than 0.
CN202010708830.5A 2020-07-22 2020-07-22 Three-port direct current converter for hybrid energy storage Active CN112072914B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010708830.5A CN112072914B (en) 2020-07-22 2020-07-22 Three-port direct current converter for hybrid energy storage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010708830.5A CN112072914B (en) 2020-07-22 2020-07-22 Three-port direct current converter for hybrid energy storage

Publications (2)

Publication Number Publication Date
CN112072914A CN112072914A (en) 2020-12-11
CN112072914B true CN112072914B (en) 2021-08-10

Family

ID=73657454

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010708830.5A Active CN112072914B (en) 2020-07-22 2020-07-22 Three-port direct current converter for hybrid energy storage

Country Status (1)

Country Link
CN (1) CN112072914B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11476765B2 (en) * 2020-12-15 2022-10-18 Otis Elevator Company Multi-port buck-boost converter and method of control
CN113922671B (en) * 2021-10-21 2023-07-21 国网经济技术研究院有限公司 Three-port flexible direct-current transmission DC-DC converter and control method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105048817A (en) * 2015-06-29 2015-11-11 江苏同芯电气科技有限公司 Buck-Boost type high-power bidirectional DC/DC converter with coupled inductors
CN105186866A (en) * 2015-09-23 2015-12-23 三峡大学 Non-isolated soft switch high-gain DC/DC converter
CN105610336A (en) * 2016-01-27 2016-05-25 东南大学 Dual-capacitor module based MMC type multi-port power electronic transformer
CN205666757U (en) * 2016-05-19 2016-10-26 山东大学 Zero energy current control system and energy storage system based on triport full -bridge DCDC converter
CN109768706A (en) * 2019-02-14 2019-05-17 西安特锐德智能充电科技有限公司 Three-level DC-DC converter and circuit control method
WO2020106324A1 (en) * 2019-06-28 2020-05-28 Huawei Technologies Co., Ltd. Ac-dc 3-level conversion system with hf intermediate ac and two separate outputs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106100334A (en) * 2016-06-22 2016-11-09 湖北竑光新能源科技有限公司 A kind of battery energy storage system two-way DC converter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105048817A (en) * 2015-06-29 2015-11-11 江苏同芯电气科技有限公司 Buck-Boost type high-power bidirectional DC/DC converter with coupled inductors
CN105186866A (en) * 2015-09-23 2015-12-23 三峡大学 Non-isolated soft switch high-gain DC/DC converter
CN105610336A (en) * 2016-01-27 2016-05-25 东南大学 Dual-capacitor module based MMC type multi-port power electronic transformer
CN205666757U (en) * 2016-05-19 2016-10-26 山东大学 Zero energy current control system and energy storage system based on triport full -bridge DCDC converter
CN109768706A (en) * 2019-02-14 2019-05-17 西安特锐德智能充电科技有限公司 Three-level DC-DC converter and circuit control method
WO2020106324A1 (en) * 2019-06-28 2020-05-28 Huawei Technologies Co., Ltd. Ac-dc 3-level conversion system with hf intermediate ac and two separate outputs

Also Published As

Publication number Publication date
CN112072914A (en) 2020-12-11

Similar Documents

Publication Publication Date Title
CN108448913B (en) Single-stage isolated AC-DC converter based on staggered parallel bridgeless PFC circuit and LLC resonance
CN105978325B (en) Non-isolation type single magnetic core three-port DC converter
CN102946194A (en) High-gain interleaving boost converter
CN106787724B (en) Switch zero-voltage turn-off double-path input high-gain DC/DC converter
CN113098271B (en) High-gain three-port DC-DC converter based on switch capacitor
CN106655775B (en) Two-port input ZVT high-gain Boost converter with soft switch
CN112072914B (en) Three-port direct current converter for hybrid energy storage
CN110277912B (en) Direct current boost conversion circuit
CN113965081B (en) Multi-working-condition high-gain three-port DC-DC converter based on Cuk
CN113541486B (en) Interleaved diode capacitor network high-gain ZVT (zero voltage zero volt) direct current converter and auxiliary circuit
CN111342664A (en) Integrated DC-DC converter and control method thereof
CN105262355B (en) A kind of multiport inverter
CN205377786U (en) Two pressure reducing type photovoltaic power generation system
CN114244104A (en) High-gain zero-ripple passive clamping type Boost converter and control method thereof
CN114465479A (en) Three-port bidirectional DC/DC converter soft switching circuit and device thereof
CN110912407B (en) Wide-range high-frequency direct current conversion device
CN111555614A (en) Interleaved DC-DC converter of automobile dual power supply system and control method thereof
CN113992024B (en) Power segmentation modulation method based on bridge arm multiplexing type isolation type DC-DC converter
CN106712504B (en) Non-isolated high-gain DC/DC converter with soft switch
CN110350786A (en) A kind of multiphase is from flowing high-gain DC converter and its control strategy
CN215934729U (en) Novel wide-input-range three-port converter
CN114825936A (en) Two-phase staggered flying capacitor bidirectional direct current converter based on coupling inductor
CN211557151U (en) Low-delay self-adaptive bidirectional DCDC converter
CN112234821B (en) High-gain direct-current converter topological structure based on active network
CN110729913B (en) Single-stage high-gain five-switch Boost type inverter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant