CN111591162A - 10kV medium-voltage direct-hanging electric vehicle charging station system - Google Patents
10kV medium-voltage direct-hanging electric vehicle charging station system Download PDFInfo
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- CN111591162A CN111591162A CN202010365049.2A CN202010365049A CN111591162A CN 111591162 A CN111591162 A CN 111591162A CN 202010365049 A CN202010365049 A CN 202010365049A CN 111591162 A CN111591162 A CN 111591162A
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- charging station
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/51—Photovoltaic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/52—Wind-driven generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Abstract
The invention discloses a 10kV medium-voltage direct-hanging type electric vehicle charging station system. The system comprises a 10kV electric vehicle charging station front stage and a DC/DC electric vehicle charging pile, wherein the input end of the 10kV electric vehicle charging station front stage is directly connected with a 10kV power grid, the output end of the 10kV electric vehicle charging pile is connected with the DC/DC electric vehicle charging pile, and the output end of the DC/DC electric vehicle charging pile is connected with the electric vehicle charging pile. The method has the advantages of low harmonic content, high-low voltage fault isolation, easiness in maintenance, bidirectional energy transmission and the like. The invention can construct an intelligent microgrid, is adjustable and controllable, realizes energy routing and ordered charging, and reduces the impact on the power grid.
Description
Technical Field
The invention relates to the field of charging station design, in particular to a 10kV medium-voltage direct-hanging type electric vehicle charging station system.
Background
A10 kV medium-voltage direct-hanging electric vehicle charging station system is mainly applied to a design scheme of an electric vehicle charging station. The 10kV medium-voltage direct-hanging type electric vehicle charging station is a novel intelligent charging station which realizes voltage transformation and energy transfer in a power system based on a power electronic transformation technology and an electromagnetic induction principle, and can also realize a plurality of functions such as reactive compensation, harmonic wave treatment, power grid interconnection, new energy grid connection, hot plug and the like compared with the traditional charging station.
Conventional electric vehicle charging stations are generally of the following construction: the power frequency transformer changes 10kV alternating current into 380V alternating current, and then the 380V alternating current is converted into direct current voltage required by the automobile through AC/DC + DC/DC for charging. In order to reduce the reactive and harmonic interference of the charging station to the power grid, reactive compensation equipment and harmonic suppression equipment are needed. And when the new energy and the energy storage equipment are required to be accessed in the charging station, the direct current provided by the new energy and the energy storage equipment is required to be inverted into alternating current. The defects of low conversion efficiency, large standby and no-load loss, high equipment cost, high construction cost, high maintenance cost and the like are brought.
Disclosure of Invention
In order to solve the problems, the invention provides a 10kV medium-voltage direct-hanging type electric vehicle charging station system.
The invention provides the following technical scheme:
the utility model provides a 10kV middling pressure hanging electric automobile charging station system that directly, its characterized in that fills electric pile including 10kV electric automobile charging station preceding stage and DC/DC electric automobile, and 10kV electric automobile charging station preceding stage input lug connection 10kV electric wire netting, DC/DC electric automobile fills electric pile is connected to its output, and DC/DC electric automobile fills electric pile output and connects electric automobile and charge for electric automobile.
Preferably, the system does not have a power frequency transformer; the passive device is an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; a cascade H-bridge topology is adopted for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT).
Preferably, the relay protection device of the system adopts a two-stage lightning protection design; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
Preferably, the system provides a flexible direct current interface for accessing new energy such as energy storage, photovoltaic, wind power and the like, the new energy is consumed on the spot, and the utilization efficiency of the new energy is improved; the intelligent micro-grid system can be conveniently established by matching with an energy storage battery and an EMS system, the functions can be flexibly configured in specific occasions (such as high-speed service areas) and the utilization rate of an energy storage power station is improved.
Preferably, the system comprises: the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work; the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger; safety protection measures, condensation prevention and humidity control; the low-loss standby mode is adopted, the power is partially dormant when the standby mode is adopted, and the standby power consumption is less than 500W; the anti-collision design is adopted, and when the equipment is impacted or inclined by 15 degrees, the power is automatically cut off; the design of preventing soaking, when the machine case suffers from the water logging, the power is automatically cut off.
Compared with the prior art, the invention has the beneficial effects that: and the energy routing topology is adopted, so that the size and the weight of the whole machine are reduced, and the functions of self-detection, self-diagnosis, self-protection, self-recovery and the like of the whole machine are realized. Safe and reliable, and the state perception of the whole system is changed from 'timing maintenance' to 'state maintenance'. High efficiency, greatly reducing operator capital recovery time. An intelligent microgrid can be built, and the intelligent microgrid is adjustable and controllable, so that energy routing and ordered charging are realized, and the impact on a power grid is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a topological structure diagram of a 10kV medium-voltage direct-hanging charging station;
FIG. 2 is an appearance structure diagram of a 10kV medium-voltage direct-hanging charging station;
fig. 3 is a design diagram of a scheme of a 10kV medium-voltage direct-hanging charging station.
Detailed Description
Hereinafter, embodiments of the present invention will be further described with reference to the accompanying drawings.
The invention provides a 10kV medium-voltage direct-hanging type electric vehicle charging station system which can be used in the field of design of 10kV medium-voltage direct-hanging charging stations and has the advantages of low harmonic content, high-low voltage fault isolation, easiness in maintenance, energy bidirectional transmission and the like.
The topology structure diagram of the 10kV medium-voltage direct-hanging charging station applied by the invention is shown in fig. 1, the appearance structure diagram is shown in fig. 2, the scheme design diagram is shown in fig. 3, and the scheme in fig. 3 comprises the following steps:
the utility model provides a 10kV middling pressure hanging electric automobile charging station system that directly, its characterized in that fills electric pile including 10kV electric automobile charging station preceding stage and DC/DC electric automobile, and 10kV electric automobile charging station preceding stage input lug connection 10kV electric wire netting, DC/DC electric automobile fills electric pile is connected to its output, and DC/DC electric automobile fills electric pile output and connects electric automobile and charge for electric automobile.
The system has no power frequency transformer; the passive device is an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; a cascade H-bridge topology is adopted for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT).
The relay protection device of the system adopts a two-stage lightning protection design; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
The system provides a flexible direct current interface for accessing new energy such as energy storage, photovoltaic, wind power and the like, the new energy is consumed on the spot, and the utilization efficiency of the new energy is improved; the intelligent micro-grid system can be conveniently established by matching with an energy storage battery and an EMS system, the functions can be flexibly configured in specific occasions (such as high-speed service areas) and the utilization rate of an energy storage power station is improved.
The system comprises: the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work; the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger; safety protection measures, condensation prevention and humidity control; the low-loss standby mode is adopted, the power is partially dormant when the standby mode is adopted, and the standby power consumption is less than 500W; the anti-collision design is adopted, and when the equipment is impacted or inclined by 15 degrees, the power is automatically cut off; the design of preventing soaking, when the machine case suffers from the water logging, the power is automatically cut off.
The system has no power frequency transformer in the aspect of energy routing topology, and the size and the weight of the whole machine are reduced; the passive device is subverted into an intelligent controllable active device, so that the functions of self-detection, self-diagnosis, self-protection, self-recovery and the like of the whole machine are realized; the cascade H-bridge topology is adopted to solve the problem of insufficient voltage resistance of a single power electronic device (IGBT), and the topology is mature and applied to products such as direct-current power transmission and distribution, high-voltage SVG (scalable vector graphics), high-voltage frequency converter and the like.
The safety and reliability are high, the relay protection device is complete and reliable, and the two-stage lightning protection design is adopted; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; an AFDD chip is developed autonomously, and key devices are subjected to online insulation monitoring; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
In the aspect of high efficiency, the conversion efficiency of the 10kV direct-hanging charging station can reach more than 95.5 percent, the capital recovery time of operators is greatly shortened, and the investment return rate is improved.
In the aspect of high power density, no power frequency transformer is used, and the volume of the whole machine is reduced; the design of a standardized container occupies less land and is convenient to install; a high-frequency transformer is designed autonomously, so that the power density is improved; the mature heat dissipation air channel design improves the heat dissipation efficiency; the power density is 2-3 times that of the conventional charging station solution.
In the aspect of power grid friendliness, 25-level modulation technology can achieve THD less than 2% under half load, which is far lower than the national standard requirement; an intelligent microgrid can be built, and the intelligent microgrid is adjustable and controllable, so that energy routing and ordered charging are realized, and the impact on a power grid is reduced; the low voltage ride through function is realized; the reactive power compensation and harmonic suppression device has the functions of active reactive power compensation and harmonic suppression, and can realize 13-order internal harmonic suppression.
The energy routing is convenient for new energy access. A flexible direct current interface is provided, and access of new energy resources such as photovoltaic, wind power, energy storage and the like is facilitated; the new energy can be consumed on the spot without multi-stage conversion, and the utilization efficiency of the new energy can be improved; an intelligent micro-grid system can be conveniently constructed, energy routing is realized, and the defects of intermittent new energy, poor volatility, poor controllability and the like are overcome; the functions are flexibly configured on specific occasions (such as high-speed service areas and the like), and the utilization rate of the charging station is improved.
The flexible charging stack is designed to withstand voltage of 1700V of a power device, and can flexibly meet power expansion and voltage class upgrading (1000V platform); the voltage output range is 50V-750V, the constant power range is 400-750V, and the device is suitable for more vehicle types; the system has the advantages of small volume, no parking space occupation, man-machine interaction interface, simplicity, attractiveness and multiple payment modes; the anti-collision device has an anti-collision design, and when the equipment is impacted or inclined by 15 degrees, the power is automatically cut off; when the case is immersed in water, the power is automatically cut off.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention is similar to the above basic scheme, and it is obvious to those skilled in the art that the design of various modified models, formulas and parameters according to the guidance of the present invention does not require creative labor. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (5)
1. The utility model provides a 10kV middling pressure hanging electric automobile charging station system that directly, its characterized in that fills electric pile including 10kV electric automobile charging station preceding stage and DC/DC electric automobile, and 10kV electric automobile charging station preceding stage input lug connection 10kV electric wire netting, DC/DC electric automobile fills electric pile is connected to its output, and DC/DC electric automobile fills electric pile output and connects electric automobile and charge for electric automobile.
2. The 10kV medium-voltage direct-hanging electric vehicle charging station system according to claim 1, wherein the 10kV medium-voltage direct-hanging electric vehicle charging station system is free of a power frequency transformer; the passive device is subverted into an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; a cascade H-bridge topology is adopted for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT).
3. The 10kV medium-voltage direct-hanging electric vehicle charging station system according to claim 1, wherein a two-stage lightning protection design is adopted for the relay protection device of the 10kV medium-voltage direct-hanging electric vehicle charging station system; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
4. The 10kV medium-voltage direct-hanging type electric vehicle charging station system according to claim 1, wherein the 10kV medium-voltage direct-hanging type electric vehicle charging station system provides a flexible direct-current interface for accessing new energy such as energy storage, photovoltaic and wind power, the new energy is consumed on the spot, and the utilization efficiency of the new energy is improved; the intelligent micro-grid system can be conveniently established by matching with an energy storage battery and an EMS system, the functions can be flexibly configured in specific occasions (such as high-speed service areas) and the utilization rate of an energy storage power station is improved.
5. The system of claim 1, wherein the 10kV medium voltage direct-hanging electric vehicle charging station system comprises:
the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work;
the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger;
safety protection measures, condensation prevention and humidity control;
the low-loss standby mode is adopted, the power is partially dormant when the standby mode is adopted, and the standby power consumption is less than 500W;
the anti-collision design is adopted, and when the equipment is impacted or inclined by 15 degrees, the power is automatically cut off;
the design of preventing soaking, when the machine case suffers from the water logging, the power is automatically cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010365049.2A CN111591162A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging electric vehicle charging station system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010365049.2A CN111591162A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging electric vehicle charging station system |
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| CN111591162A true CN111591162A (en) | 2020-08-28 |
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| CN202010365049.2A Withdrawn CN111591162A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging electric vehicle charging station system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205544337U (en) * | 2016-04-20 | 2016-08-31 | 三峡大学 | City direct -current power distribution system suitable for new forms of energy and electric automobile insert |
| CN109066822A (en) * | 2018-07-18 | 2018-12-21 | 清华大学 | A kind of multi-point dispersion formula distribution system dispatching method based on electric power electric transformer |
| CN109301813A (en) * | 2018-11-30 | 2019-02-01 | 阳光电源（上海）有限公司 | A kind of fault control method, controller and mesohigh energy conversion system |
| CN109347357A (en) * | 2018-10-09 | 2019-02-15 | 特变电工新疆新能源股份有限公司 | A kind of four port electric power electric transformers |
| CN110690731A (en) * | 2019-08-20 | 2020-01-14 | 东南大学 | Power electronic transformer applicable to hybrid micro-grid and coordination control and mode switching method thereof |
-
2020
- 2020-04-30 CN CN202010365049.2A patent/CN111591162A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205544337U (en) * | 2016-04-20 | 2016-08-31 | 三峡大学 | City direct -current power distribution system suitable for new forms of energy and electric automobile insert |
| CN109066822A (en) * | 2018-07-18 | 2018-12-21 | 清华大学 | A kind of multi-point dispersion formula distribution system dispatching method based on electric power electric transformer |
| CN109347357A (en) * | 2018-10-09 | 2019-02-15 | 特变电工新疆新能源股份有限公司 | A kind of four port electric power electric transformers |
| CN109301813A (en) * | 2018-11-30 | 2019-02-01 | 阳光电源（上海）有限公司 | A kind of fault control method, controller and mesohigh energy conversion system |
| CN110690731A (en) * | 2019-08-20 | 2020-01-14 | 东南大学 | Power electronic transformer applicable to hybrid micro-grid and coordination control and mode switching method thereof |
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Application publication date: 20200828 |
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