CN105762899A - Charging system for AC-DC distribution intelligent charging station - Google Patents
Charging system for AC-DC distribution intelligent charging station Download PDFInfo
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- CN105762899A CN105762899A CN201410784839.9A CN201410784839A CN105762899A CN 105762899 A CN105762899 A CN 105762899A CN 201410784839 A CN201410784839 A CN 201410784839A CN 105762899 A CN105762899 A CN 105762899A
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Abstract
The invention discloses a charging system for an AC-DC distribution intelligent charging station, and the system comprises a centralized-type electric energy conversion device, a DC bus, a plurality of DC conversion charging modules, and a battery box. The AC side of the centralized-type electric energy conversion device is connected with an AC power supply, and the DC side of the centralized-type electric energy conversion device is connected with the DC bus. The centralized-type electric energy conversion device is used for converting the electric energy of the AC power supply into DC electric energy. The plurality of DC conversion charging modules are respectively connected with the DC bus, and the battery box is connected with one or more DC conversion charging modules. According to the technical scheme of the invention, the centralized-type electric energy conversion device enables the electric energy of a power grid to be converted into high-voltage DC electric energy in a centralized manner so as to supply the electric energy to the DC bus. The centralized-type electric energy conversion device is used for achieving a large-power rectification function, so the system is high in integration degree, simplifies the end equipment, and solves a problem in the prior art that distributed operation is low in integration degree and is large in occupied space.
Description
Technical field
The present invention relates to power domain, in particular to the charging system of a kind of alternating current-direct current distribution Intelligent charging station.
Background technology
AC conversion is the unidirectional current mated with battery parameter by AC/DC charger by the charging system of the alternating current-direct current distribution Intelligent charging station that existing use is general, Fig. 1 is the charging system of the alternating current-direct current distribution Intelligent charging station according to prior art, as shown in Figure 1, in existing charging system, the AC of AC/DC charger is directly connected with the three phase mains 11 of electrical network, respectively under the control of charging station station end background monitoring system 12, it is that the unidirectional current meeting battery specifications is by battery case 15 by electrical network AC rectification, wherein charger 14 with the 12 of charging station station end background monitoring system communication undertaken by communication bus 13, battery case 15 is arranged according to the specification of different batteries.
There is following shortcoming in existing this charging system:
1, charging function realizes exchange and is converted to the charge function of direct current, it is impossible to accomplish battery power and the bi-directional conversion of electrical network electric energy；
2, the distribution of AC/DC charger runs, and overall operation efficiency is low, and end backstage of standing individually communicates with charger, is not easy to optimal control；
3, separate-box type VD grade is low, and output electric current is big, causes conductor cross-section excessive, adds wire cost；
4, AC/DC charger volume is relatively big, arranged apart with battery case, increases floor space, and particularly when occurring that charger is longer with the distance of battery case, line drop substantially increases, and charger output performance is subjected to big impact, and line loss is greatly increased；
5, substantial amounts of big wire diameter cable laying workload is big, expends substantial amounts of manpower and materials.
Run, for multiple AC/DC chargers distribution in the charging system of the alternating current-direct current distribution Intelligent charging station of prior art, the problem that the low floor space of integrated level is big, not yet propose effective solution at present.
Summary of the invention
It is desirable to provide the charging system of a kind of alternating current-direct current distribution Intelligent charging station, to solve the problem that in prior art, multiple AC/DC chargers distribution operation low floor space of integrated level is big.
To achieve these goals, according to an aspect of the invention, it is provided the charging system of a kind of alternating current-direct current distribution Intelligent charging station.
A kind of charging system of alternating current-direct current distribution Intelligent charging station, including centralized device for converting electric energy, dc bus, multiple DC converting charging module, battery case, wherein, the AC of described centralized device for converting electric energy is connected with alternating current power supply, the DC side of described centralized device for converting electric energy is connected with described dc bus
Described centralized device for converting electric energy is for being converted to direct current energy by the electric energy of described alternating current power supply；
The plurality of DC converting charging module, is connected with described dc bus respectively, for the direct current energy on dc bus is converted to the rechargeable electrical energy meeting battery specifications；
Described battery case, is connected with one or more described DC converting charging modules, for the described rechargeable electrical energy meeting battery specifications is supplied to battery.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, described DC converting charging module, it is additionally operable to provide on described dc bus the electric energy of battery storage；Described centralized device for converting electric energy is additionally operable to be converted to the direct current energy of described dc bus AC energy, and feeds back described AC energy to alternating current power supply.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, described centralized device for converting electric energy includes the electric energy conversion module of multiple mutual parallel connection.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, also include: load dispatch administrative unit, it is connected with described centralized device for converting electric energy and the plurality of DC converting charging module respectively, for receiving described centralized device for converting electric energy and the operating state data of the plurality of DC converting charging module, and to described centralized device for converting electric energy and the plurality of DC converting charging module transmitting control commands.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, also include: AC power distribution cabinet/AC distribution panel, be connected between described alternating current power supply and described centralized device for converting electric energy.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, also including: transformator, be connected between described alternating current power supply and described AC power distribution cabinet/AC distribution panel, being used for the voltage transformation of alternating current power supply is meet the voltage that described centralized device for converting electric energy AC requires.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, also include: new forms of energy access device, be connected with described dc bus, for providing the electric energy from photovoltaic cell to described dc bus.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, the nominal charging voltage of the plurality of DC converting charging module is different, is connected respectively with the battery case of corresponding voltage respectively.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, the plurality of DC converting charging module and battery case centralized arrangement are in integration charging cabinet.
Preferably, in the charging system of above-mentioned a kind of alternating current-direct current distribution Intelligent charging station, the rated voltage of the DC side of described centralized device for converting electric energy is more than or equal to 800V.
Application technical scheme, the electric energy concentration of electrical network is converted to high-tension direct current energy and is supplied to dc bus by centralized device for converting electric energy, distributed to multiple DC converting charging module by dc bus, be converted to the rechargeable electrical energy meeting battery request by DC converting charging module.Utilizing centralized device for converting electric energy to complete powerful rectification function, integrated level is high, simplifies end-equipment, thus solving distribution in prior art to run the problem that the low floor space of integrated level is big.
Accompanying drawing explanation
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the charging system of the alternating current-direct current distribution Intelligent charging station according to prior art；
Fig. 2 is the schematic diagram of the charging system of alternating current-direct current distribution Intelligent charging station according to embodiments of the present invention；
Fig. 3 is the schematic diagram of the integrated charging cabinet of the charging system of the alternating current-direct current distribution Intelligent charging station of the embodiment of the present invention；
Fig. 4 is the embodiment of a kind of optimal way of the charging system of the alternating current-direct current distribution Intelligent charging station of the embodiment of the present invention.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Embodiments provide the charging system of a kind of alternating current-direct current distribution Intelligent charging station, Fig. 2 is the schematic diagram of the charging system of alternating current-direct current distribution Intelligent charging station according to embodiments of the present invention, as shown in Figure 2, the charging system of this alternating current-direct current distribution Intelligent charging station includes: centralized device for converting electric energy 23, dc bus 22, multiple DC converting charging modules 21, battery case 15, wherein, the AC of centralized device for converting electric energy 23 is connected with alternating current power supply 11, the DC side of centralized device for converting electric energy 23 is connected with dc bus 22, centralized device for converting electric energy 23 is for being converted to direct current energy by the electric energy of alternating current power supply 11；Multiple DC converting charging modules 21, are connected with dc bus respectively, for the direct current energy on dc bus 22 is converted to the rechargeable electrical energy meeting battery specifications；Battery case 15, is connected with one or more DC converting charging modules 21, for the rechargeable electrical energy meeting battery specifications is supplied to battery.
Above-mentioned alternating current power supply 11 can be electrical network, the electric energy concentration of electrical network is converted to high-tension direct current energy and is supplied to dc bus 22 by centralized device for converting electric energy 23, distributed to multiple DC converting charging module 21 by dc bus 22, be converted to the rechargeable electrical energy meeting battery request by DC converting charging module 21.Utilizing centralized device for converting electric energy to complete powerful rectification function, integrated level is high, simplifies end-equipment, thus solving distribution in prior art to run the problem that the low floor space of integrated level is big.
Preferably, above-mentioned DC converting charging module 21, it is also possible to for providing dc bus 22 by the electric energy of battery storage；Centralized device for converting electric energy 23 is additionally operable to be converted to the direct current energy of dc bus 22 AC energy, and to alternating current power supply 11 feedback communication electric energy.Now, battery is as accumulator, DC converting charging module 21 realizes the low pressure copped wave function to high pressure, centralized device for converting electric energy 23 realizes the direct current inversion function to exchange, thus constituting an energy-storage system, the bi-directional conversion of power grid energy and battery power can be realized, reach the purpose of peak load shifting emergency service.
Centralized device for converting electric energy 23 can include the electric energy conversion module of multiple mutual parallel connection, thus adopting unit machine according to demand, and the mode of operation of N+1 backup, improve the functional reliability of centralized device for converting electric energy 23.
The charging system of the alternating current-direct current distribution Intelligent charging station of the embodiment of the present invention, can also include: load dispatch administrative unit, it is connected with centralized device for converting electric energy 23 and multiple DC converting charging module 21 respectively, for receiving centralized device for converting electric energy 23 and the operating state data of multiple DC converting charging module 21, and to centralized device for converting electric energy 23 and multiple DC converting charging module 21 transmitting control commands.The mode of operation of centralized device for converting electric energy 23 and DC converting charging module 21, as the control centre of whole charging system, is controlled by load dispatch administrative unit according to actual needs, and the power of conversion is adjusted.
Preferably, AC power distribution cabinet/AC distribution panel can also be set, such that it is able to exchange wiring is carried out centralized arrangement between alternating current power supply 11 and centralized device for converting electric energy 23.It is also provided with transformator between this external alternating current power supply 11 and AC power distribution cabinet/AC distribution panel, is meet the voltage that centralized device for converting electric energy 23 AC requires by the voltage transformation of alternating current power supply.When the charging system of alternating current-direct current distribution Intelligent charging station is in energy storage pattern, the voltage of centralized device for converting electric energy 23 AC is converted to the voltage of alternating current power supply by transformator.
The charging system of some alternating current-direct current distribution Intelligent charging station is also provided with photovoltaic system at present, supplementing for electrical network electric energy, in this case, photovoltaic system requires over inverter and is transported on electrical network, being supplied battery by electrical network again, this mode causes the meaningless circulation of electric energy.The charging system of the alternating current-direct current distribution Intelligent charging station of the embodiment of the present invention can also include new forms of energy access device, is connected with dc bus, for providing the electric energy from photovoltaic cell to dc bus.Photovoltaic cell is directly connected on dc bus, it is achieved the conveying of energy, simplifies the access of photovoltaic system, it is to avoid the waste of photovoltaic electric energy.
The rated voltage of different batteries is different, electric pressures as multiple in 40V, 80V, 100V, 120V, 150V, 600V etc., electric pressure and power according to battery export, therefore the charging system of the embodiment of the present invention can arrange many group DC converting charging modules, and often the nominal charging voltage of the multiple DC converting charging modules in group is different.One group of DC converting charging module is connected respectively with the battery case of corresponding voltage respectively.When specifically arranging, it is possible to use a battery case corresponding to the DC converting charging module of multiple same voltages output.
Owing to the volume of DC converting charging module is significantly less than existing AC/DC charging module, preferably, multiple battery cases and multiple DC converting charging module can concentrate in integration charging cabinet, Fig. 3 is the schematic diagram of the integrated charging cabinet of the charging system of the alternating current-direct current distribution Intelligent charging station of the embodiment of the present invention, as shown in Figure 3, multiple DC converting charging modules 21 are arranged on bottom of cabinet bulk, multiple battery cases overlay above charging module successively, and this arrangement makes the volume of charger be greatly reduced.
In order to reduce the line loss of direct current energy, the rated voltage of the DC side of centralized device for converting electric energy could be arranged to more than or equal to 800V.
Below a kind of specific embodiment mode of the charging system of the alternating current-direct current distribution Intelligent charging station of the embodiment of the present invention is illustrated.Fig. 4 is the embodiment of a kind of optimal way of the charging system of the alternating current-direct current distribution Intelligent charging station of the embodiment of the present invention, as shown in Figure 4, the charging system of alternating current-direct current distribution Intelligent charging station includes: centralized device for converting electric energy, dc bus, multiple DC converting charging module, battery case, load dispatch administrative unit, AC power distribution cabinet/AC distribution panel, transformator, new forms of energy access device.
The advantage that the charging system of the alternating current-direct current distribution Intelligent charging station of this optimal way remains tradition charging and conversion electric station charging system monitoring mode, it is proposed to dc bus is as charging system (CDS-DPbus) mode of power bus pattern.Namely distribution system and high power DC equipment group centralized configuration, unified the direct current of output HIGH voltage grade by dc power bus, shares for each charger.
Centralized device for converting electric energy, being made up of high power digital DC power source unit, DC monitoring system, insulating monitoring etc., every unit DC power output voltage grade is be more than or equal to 800V, power 200kW, adopt unit machine, the mode of operation of N+1 backup according to demand.Unidirectional current is transported to power bus by unification.
Dc bus is the power cell that electric energy concentrates output, and rated voltage, be more than or equal to DC800V, matches with the DC voltage grade of centralized device for converting electric energy.The power request of the output-controlled load dispatch administrative unit in each DC converting charging module of energy of power bus.Realize the centralized and unified conveying of direct current energy.
DC converting charging module adopts DC/DC pattern, the different electric pressures used required for power bus DC800V is converted to battery, meet battery required voltage grade and power output as DC40V, DC80V, DC100V, DC120V, DC150V, DC600V etc. are any.DC/DC replaces original AC/DC so that the volume of charger is greatly reduced.For separate-box type charging system, it is achieved charger is integrated with battery carrier, namely integration charging cabinet is possibly realized.The complete-vehicle-type open air charger DC/DC design of different electric pressures is also simplified, and volume will reduce therewith, power more economically, rationally.
The new forms of energy access device of the charging system of the alternating current-direct current distribution Intelligent charging station of this optimal way is due to the application of dc power bus, simpler.Photovoltaic cell only need to be directly accessed dc power bus through header box, DC lightning prevention cabinet through reasonable disposition and conversion, it is possible to realizes the conveying of energy.
Load dispatch administrative unit, on the basis of existing charging station station end background monitoring system, increases following function: one is the function of the distributed DC/DC power request of diversification；Two is that high power DC machine set system output integrated controls function；Three is energy-storage system rational management function.
Application technical scheme, the electric energy concentration of electrical network is converted to high-tension direct current energy and is supplied to dc bus by centralized device for converting electric energy, distributed to multiple DC converting charging module by dc bus, be converted to the rechargeable electrical energy meeting battery request by DC converting charging module.Utilizing centralized device for converting electric energy to complete powerful rectification function, integrated level is high, simplifies end-equipment, thus solving distribution in prior art to run the problem that the low floor space of integrated level is big.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or it is distributed on the network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, can be stored in storage device is performed by calculation element, or they are fabricated to respectively each integrated circuit modules, or the multiple modules in them or step are fabricated to single integrated circuit module realize.So, the present invention is not restricted to the combination of any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. the charging system of an alternating current-direct current distribution Intelligent charging station, it is characterised in that include centralized device for converting electric energy, dc bus, multiple DC converting charging module, battery case, wherein,
The AC of described centralized device for converting electric energy is connected with alternating current power supply, and the DC side of described centralized device for converting electric energy is connected with described dc bus, and described centralized device for converting electric energy is for being converted to direct current energy by the electric energy of described alternating current power supply；
The plurality of DC converting charging module, is connected with described dc bus respectively, for the direct current energy on dc bus is converted to the rechargeable electrical energy meeting battery specifications；
Described battery case, is connected with one or more described DC converting charging modules, for the described rechargeable electrical energy meeting battery specifications is supplied to battery.
2. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 1, it is characterised in that
Described DC converting charging module, is additionally operable to provide on described dc bus the electric energy of battery storage；
Described centralized device for converting electric energy is additionally operable to be converted to the direct current energy of described dc bus AC energy, and feeds back described AC energy to alternating current power supply.
3. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 1, it is characterised in that described centralized device for converting electric energy includes the electric energy conversion module of multiple mutual parallel connection.
4. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 1, it is characterized in that, also include: load dispatch administrative unit, it is connected with described centralized device for converting electric energy and the plurality of DC converting charging module respectively, for receiving described centralized device for converting electric energy and the operating state data of the plurality of DC converting charging module, and to described centralized device for converting electric energy and the plurality of DC converting charging module transmitting control commands.
5. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 1, it is characterised in that also include: AC power distribution cabinet/AC distribution panel, be connected between described alternating current power supply and described centralized device for converting electric energy.
6. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 5, it is characterized in that, also include: transformator, being connected between described alternating current power supply and described AC power distribution cabinet/AC distribution panel, being used for the voltage transformation of alternating current power supply is meet the voltage that described centralized device for converting electric energy AC requires.
7. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 1, it is characterised in that also include: new forms of energy access device, be connected with described dc bus, for providing the electric energy from photovoltaic cell to described dc bus.
8. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 1, it is characterised in that the nominal charging voltage of the plurality of DC converting charging module is different, is connected respectively with the battery case of corresponding voltage respectively.
9. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 8, it is characterised in that the plurality of DC converting charging module and battery case centralized arrangement are in integration charging cabinet.
10. the charging system of alternating current-direct current distribution Intelligent charging station according to claim 1, it is characterised in that the rated voltage of the DC side of described centralized device for converting electric energy is more than or equal to 800V.
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| CN201410784839.9A CN105762899A (en) | 2014-12-17 | 2014-12-17 | Charging system for AC-DC distribution intelligent charging station |
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| CN201410784839.9A CN105762899A (en) | 2014-12-17 | 2014-12-17 | Charging system for AC-DC distribution intelligent charging station |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106564397A (en) * | 2016-11-07 | 2017-04-19 | 上海泓语电气技术有限公司 | Direct-current charging type charging station system |
| CN107508305A (en) * | 2017-10-17 | 2017-12-22 | 深圳市泰昂能源科技股份有限公司 | Expansion-type energy storage framework and system |
| CN107834647A (en) * | 2017-11-21 | 2018-03-23 | 深圳市安和威电力科技股份有限公司 | It is a kind of to fill unit charging collection monitoring management system more |
| CN108011385A (en) * | 2016-10-31 | 2018-05-08 | 西安特锐德智能充电科技有限公司 | A kind of light stores up charge and discharge system |
| CN110901471A (en) * | 2019-11-19 | 2020-03-24 | 广州东方电科自动化有限公司 | Rapidly-extensible electric automobile flexible direct-current charging system |
| CN112531795A (en) * | 2019-09-17 | 2021-03-19 | 台达电子工业股份有限公司 | Carrier charging system and three-phase power supply system applied to solid-state transformer framework |
-
2014
- 2014-12-17 CN CN201410784839.9A patent/CN105762899A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011385A (en) * | 2016-10-31 | 2018-05-08 | 西安特锐德智能充电科技有限公司 | A kind of light stores up charge and discharge system |
| CN106564397A (en) * | 2016-11-07 | 2017-04-19 | 上海泓语电气技术有限公司 | Direct-current charging type charging station system |
| CN107508305A (en) * | 2017-10-17 | 2017-12-22 | 深圳市泰昂能源科技股份有限公司 | Expansion-type energy storage framework and system |
| CN107508305B (en) * | 2017-10-17 | 2020-04-07 | 深圳市泰昂能源科技股份有限公司 | Capacity-expanding energy storage framework and system |
| CN107834647A (en) * | 2017-11-21 | 2018-03-23 | 深圳市安和威电力科技股份有限公司 | It is a kind of to fill unit charging collection monitoring management system more |
| CN112531795A (en) * | 2019-09-17 | 2021-03-19 | 台达电子工业股份有限公司 | Carrier charging system and three-phase power supply system applied to solid-state transformer framework |
| CN110901471A (en) * | 2019-11-19 | 2020-03-24 | 广州东方电科自动化有限公司 | Rapidly-extensible electric automobile flexible direct-current charging system |
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Application publication date: 20160713 |