CN103795132A - Modularization multiport type electric car quick charging station based on high-frequency isolation technology - Google Patents
Modularization multiport type electric car quick charging station based on high-frequency isolation technology Download PDFInfo
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- CN103795132A CN103795132A CN201410069928.5A CN201410069928A CN103795132A CN 103795132 A CN103795132 A CN 103795132A CN 201410069928 A CN201410069928 A CN 201410069928A CN 103795132 A CN103795132 A CN 103795132A
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Abstract
The invention relates to a modularization multiport type electric car quick charging station based on a high-frequency isolation technology. The modularization multiport type electric car quick charging station is characterized by comprising a 10 kV/0.38 kV alternating-current transformer, a 0.38 kV/0.38 kV isolation type transformer, a modularization rectifying device, a high-frequency isolation direct-current transformer, a DC-DC converter, a new energy power generation system, an energy storage system and a background monitoring and intelligent managing system which carries out real-time monitoring. The charging station has the advantages of being small in occupied space, high in system converting efficiency, low in power grid harmonic pollution and safe, convenient and quick to use, new energy system direct current grid connection is convenient, and the system integration degree is high.
Description
Technical field
The invention belongs to electric vehicle rapid charging infrastructure field, is a kind of modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology.
Background technology
Existing charging electric vehicle mode mainly contains three kinds, is respectively trickle charge pattern, and fast mold filling formula, changes power mode.Three kinds of charge mode rational deployment also cooperatively interact and can better improve electric automobile popularity rate.
Therefore, electric vehicle rapid charging device belongs to an irreplaceable part in ev industry chain equally.
At present, as shown in Figure 1, the system configuration that existing electric vehicle rapid charging station adopts mostly is charge mode one to one, and power output is 50kW left and right, can in 15 minutes to 30 minutes, be full of 80% of batteries of electric automobile capacity.
Present stage mainly there is following problem in electric vehicle rapid charging station: 1 charging station floor space is large; 2 system changeover efficiency are low; 3 higher harmonic pollution in electric power net; 4 grid-connected power generation system are difficult for directly access; 5 system integration integrated levels are low.
Summary of the invention
The object of the invention is, overcome the deficiencies in the prior art, provide a kind of floor space little, system changeover efficiency is high, harmonic pollution in electric power net is low, use safe, convenient, fastly, new energy resources system direct current is grid-connected more convenient, and the high modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology of system integration integrated level.
Realizing the technical scheme that above-mentioned purpose adopts is: a kind of modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology, comprising: realized and in 10kV, pressed the 10kV/0.38kV AC transformer that between AC distribution net and 380V AC distribution net, power converts mutually by power frequency step-down; Two groups can make the electric insulation completely of primary side and secondary side, and realize the 0.38kV/0.38kV isolated form transformer of primary side and secondary side circuit isolation; Two groups can be carried out rectifying conversion to threephase AC electric energy, the modularization rectifying device of DC power output, and described rectifying device is one or more rectification modules, the DC side of two groups of rectifying devices is composed in series bipolarity direct current net simultaneously; Adopt high-frequency isolation technology, the direct current energy after rectification is carried out to decompression transformation, meet the high-frequency isolation type commutator transformer that electric vehicle rapid charging electric pressure requires; Can convert direct current energy, meet the DC-DC converter of the quality requirement of electric vehicle rapid charging device to direct current energy; For improving energy resource supply greenization, adopt the direct current grid type grid-connected power generation system of photovoltaic generation, wind power generation directly to access the DC side of low-voltage-grade; Can carry out energy adjustment to accessing described grid-connected power generation system whole quick charging system of electric vehicle afterwards, maintain the energy-storage system of system reliability service.
Described high-frequency isolation type commutator transformer comprises: primary side loop, high frequency transformer and secondary side circuit are electrically connected successively, and described primary side loop is two groups of the input series connection inverter bridge legs that initiatively switching tube IGBT or Mosfet form; Described secondary side circuit is the rectifying bridge arm that two groups of diode D of output-parallel form; High frequency transformer takes LLC resonance principle to pass energy, makes primary side loop active switch realize ZVS open-minded, and secondary side circuit diode ZCS turn-offs.
Also comprise for serial data being converted to IP data or IP data being converted to serial data and transmitting by cordless communication network, to realize the background monitoring and the intelligent management system that the electrically-charging equipment in electric vehicle rapid charging station are carried out to monitoring in real time.
Modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology of the present invention, break through the conventional system architecture concept of existing electric vehicle rapid charging station, " high-frequency isolation technology " is incorporated in the design of electric automobile charging station modularization multi-port structure, give its " new system configuration concept ", there is floor space little, system changeover efficiency is high, harmonic pollution in electric power net is low, use safe, convenient, fast, new energy resources system direct current is grid-connected more convenient, and system integration integrated level advantages of higher.Meanwhile, as the auxiliary facility of ev industry, under the vigorously supporting of national policy, will fast-developing welcome new opportunity to develop.
Accompanying drawing explanation
Fig. 1 is existing quick charge station structured flowchart.
Fig. 2 is the modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station structured flowchart based on high-frequency isolation technology of the present invention.
Fig. 3 is high-frequency isolation type commutator transformer circuit topological structure figure.
Fig. 4 is the loop topology structure chart of Fig. 3 medium/high frequency transformer first and second side.
Embodiment
Below in conjunction with accompanying drawing and example, the present invention is further elaborated.
With reference to Fig. 2, modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology of the present invention, comprise: the 10kV/0.38kV step-down transformer that prior art is conventional: what provide electric energy for electric vehicle rapid charging device is city 10kV power distribution network, the effect of tradition step-down transformer is to 380V, for electric vehicle rapid charging station provides electric energy by lower voltage; Exchange 0.38kV/0.38kV isolated form transformer: the interchange 380V voltage of output carries out isolated variable through 0.38kV/0.38kV isolated form transformer again, the Main Function of isolating transformer is: make the electric insulation completely of primary side and secondary side, also make this loop isolation, can make the DC side of two groups of rectifying devices connect; Another very important effect is exactly to protect personal safety, isolation dangerous voltage; Modularization AC-DC converting means: the 380V alternating current through isolated variable carries out rectifying conversion, output direct current.In switching process, adopt modularized design, can carry out rectification through one or more rectifying devices, can determine it is to carry out rectifying conversion by a module or multiple module according to the burden requirement of actual conditions, the direct current that carries out exporting after rectifying conversion is pooled on positive and negative DC bus, adopt bipolarity topological structure, after rectifying conversion, the direct current of output is pooled on positive and negative two buses, and bipolar sexual type structure theory is multiple modularization rectifying device switching processes finish after, share a negative pole bus, the advantage that its structure has is: save construction cost, increase the dependability of charging device of electric automobile, facilitate new forms of energy equipment and energy storage device connecting system, high-frequency isolation commutator transformer is the commutator transformer that adopts high-frequency isolation technology, and it can will convert through the direct current producing after modularization switching process, and applies high-frequency isolation technology, to meet electric vehicle rapid charging technical requirement, DC-DC converting means: direct current is converted, make the direct current energy in charging process meet SAE (Society of Automotive Engineers, SAE) electric vehicle rapid charging LEVEL-3 standard, the grid-connected power generation system of photovoltaic generation, wind power generation: photovoltaic converter is a unidirectional isolation type DC-DC converter, be operated in MPPT maximum power point tracking (Maximum Power Point Tracking, MPPT) under pattern, wind-force converter is a three phase variable frequency active rectifier, is operated in equally under MPPT pattern, under special circumstances, can regulate control to DC side busbar voltage, energy content of battery stocking system (BESS): in the time that three-phase active front controller carries out Regulation Control, BESS is operated under current-mode, when alternating current net side occurs when abnormal, BESS can be responsible for the adjusting of DC bus-bar voltage, keeps the reliability of local power, background monitoring and intelligent management system: under conventional background monitoring administrating system condition, install data transmission unit (Data Transfer unit is called for short DTU) additional, DTU is specifically designed to serial data to be converted to IP data or IP data are converted to the wireless terminal device that serial data transmits by cordless communication network, for example: remote measurement, remote signalling, remote control are to realize the intelligent requirements to electric vehicle rapid charging.
With reference to Fig. 3 and Fig. 4, high-frequency isolation type commutator transformer has been taked LLC resonant transformation principle, realizes its high-frequency isolation, the function of energy transmission and step-down.It is open-minded that while can make the switching devices such as the inverter bridge leg active switching tube IGBT/Mosfet in transformer primary side loop realize ZVS, and the rectifying bridge arm diode D of secondary side circuit realizes ZCS and turn-offs, and has improved its conversion efficiency.Therefore high frequency transformer can be operated under higher a-c cycle, has reduced volume, has reduced cost, has saved space, and electronic devices and components used are commercially available prod simultaneously.
Modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology of the present invention can carry out quick charge to electric automobile, makes electric automobile can complete at short notice charging, increases electric automobile flying power.
Embodiment is only to explanation of the present invention, does not form the restriction to claim protection range, and those skilled in the art are alternative without being equal to of creative work, all in protection range of the present invention.
Claims (3)
1. the modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology, it is characterized in that, comprising: realize and in 10kV, press the 10kV/0.38kV AC transformer that between AC distribution net and 380V AC distribution net, power converts mutually by power frequency step-down; Two groups can make the electric insulation completely of primary side and secondary side, and realize the 0.38kV/0.38kV isolated form transformer of primary side and secondary side circuit isolation; Two groups can be carried out rectifying conversion to threephase AC electric energy, the modularization rectifying device of DC power output, and described rectifying device is one or more rectification modules, the DC side of two groups of rectifying devices is composed in series bipolarity direct current net simultaneously; Adopt high-frequency isolation technology, the direct current energy after rectification is carried out to decompression transformation, meet the high-frequency isolation type commutator transformer that electric vehicle rapid charging electric pressure requires; Can convert direct current energy, meet the DC-DC converter of the quality requirement of electric vehicle rapid charging device to direct current energy; For improving energy resource supply greenization, adopt the direct current grid type grid-connected power generation system of photovoltaic generation, wind power generation, can directly access the DC side of low-voltage-grade; Can carry out energy adjustment to accessing described grid-connected power generation system whole quick charging system of electric vehicle afterwards, maintain the energy-storage system of system reliability service.
2. the modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology according to claim 1, it is characterized in that, described high-frequency isolation type commutator transformer comprises: primary side loop, high frequency transformer and secondary side circuit are electrically connected successively, and described primary side loop is two groups of the input series connection inverter bridge legs that initiatively switching tube IGBT or Mosfet form; Described secondary side circuit is the rectifying bridge arm that two groups of diode D of output-parallel form; High frequency transformer takes LLC resonance principle to pass energy, makes primary side loop active switch realize ZVS open-minded, and secondary side circuit diode ZCS turn-offs.
3. the modularization multiterminal shape of the mouth as one speaks electric vehicle rapid charging station based on high-frequency isolation technology according to claim 1, it is characterized in that, also comprise for serial data being converted to IP data or IP data being converted to serial data and transmitting by cordless communication network, to realize the background monitoring and the intelligent management system that the electrically-charging equipment in electric vehicle rapid charging station are carried out to monitoring in real time.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016015281A1 (en) * | 2014-07-31 | 2016-02-04 | Abb Technology Ltd | System for charging battery of electric vehicle |
| WO2019215134A1 (en) * | 2018-05-09 | 2019-11-14 | Robert Bosch Gmbh | Multi-output rectifier and supply station for providing a multi-pole dc voltage network, in particular for an apparatus for charging a battery |
| WO2020216016A1 (en) * | 2019-04-24 | 2020-10-29 | 深圳英飞源技术有限公司 | Energy storage charging system |
| CN112311242A (en) * | 2019-08-01 | 2021-02-02 | 奥迪股份公司 | Bidirectional direct current wall box for electric vehicle |
| CN113964921A (en) * | 2021-11-01 | 2022-01-21 | 国网湖北省电力有限公司电力科学研究院 | Multiport new forms of energy electric automobile charging circuit |
| CN113972720A (en) * | 2021-10-29 | 2022-01-25 | 哈尔滨理工大学 | Direct current input type electric automobile charging system |
| US11230202B2 (en) | 2019-12-16 | 2022-01-25 | Abb Schweiz Ag | Multiple vehicle charging system |
| CN115362610A (en) * | 2020-03-30 | 2022-11-18 | 日立能源瑞士股份公司 | SST system with multiple LVDC outputs |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015281A1 (en) * | 2014-07-31 | 2016-02-04 | Abb Technology Ltd | System for charging battery of electric vehicle |
| US10179515B2 (en) | 2014-07-31 | 2019-01-15 | Abb Schweiz Ag | System for charging battery of electric vehicle including a controller connected to at least one switch |
| WO2019215134A1 (en) * | 2018-05-09 | 2019-11-14 | Robert Bosch Gmbh | Multi-output rectifier and supply station for providing a multi-pole dc voltage network, in particular for an apparatus for charging a battery |
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| CN115362610B (en) * | 2020-03-30 | 2024-04-02 | 日立能源有限公司 | SST system with multiple LVDC outputs |
| CN113972720A (en) * | 2021-10-29 | 2022-01-25 | 哈尔滨理工大学 | Direct current input type electric automobile charging system |
| CN113964921A (en) * | 2021-11-01 | 2022-01-21 | 国网湖北省电力有限公司电力科学研究院 | Multiport new forms of energy electric automobile charging circuit |
| CN113964921B (en) * | 2021-11-01 | 2024-02-02 | 国网湖北省电力有限公司电力科学研究院 | Charging circuit of multiport new energy electric automobile |
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Application publication date: 20140514 |