CN208867867U - DC charging station earthed system - Google Patents

DC charging station earthed system Download PDF

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Publication number
CN208867867U
CN208867867U CN201821607836.8U CN201821607836U CN208867867U CN 208867867 U CN208867867 U CN 208867867U CN 201821607836 U CN201821607836 U CN 201821607836U CN 208867867 U CN208867867 U CN 208867867U
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CN
China
Prior art keywords
charging pile
protective grounding
row
charging station
equipment
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Active
Application number
CN201821607836.8U
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Chinese (zh)
Inventor
谢鹰
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.)
Suzhou Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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Suzhou Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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Priority to CN201821607836.8U priority Critical patent/CN208867867U/en
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    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

The utility model relates to a kind of DC charging station earthed systems; be set to including switchgear house, distribution transformer, supply side AC distribution device, outdoor infrastructure, charging pile DC charging station in, which includes mutually independent working earthing system, controller switching equipment protective grounding system, charging pile protective grounding system；The neutral point of distribution transformer is connected to working earthing system and draws PE line, and the electrical equipment in supply side AC distribution device, alternating current equipment is connected with PE line respectively in the stake in charging pile；Shell, the shell of distribution transformer, the door and window of switchgear house and the roof lightning protection device of supply side AC distribution device are connected with controller switching equipment protective grounding system；Outdoor base setting, the shell of charging pile and wherein in stake DC equipment is connected with charging pile protective grounding system.The utility model safety, high reliablity can ensure life, the property safety of producers.

Description

DC charging station earthed system
Technical field
The utility model relates to a kind of earthed systems being set in the DC charging station for electric vehicle charging.
Background technique
Existing charging station is based on TN-S system and is arranged, the system structure comprising earthed system used such as attached drawing 1 It is shown, in Fig. 1 it can be seen from include major network earthed system (protective grounding) and the neutral-point solid ground system that works in charging station It unites (working earthing), also, both major network earthed system and work solidly earthed neutral system are connected directly.Distribution becomes The neutral point of depressor is connected with solidly earthed neutral system and draws PE line, the shell of distribution transformer, various supply sides The shell of AC distribution device (including screen cabinet, power and lighting device, low-tension switch cabinet, high-tension switch cabinet, rectifier cabinet etc.), open air The door and window and roof lightning protection device of awning and switchgear house are connected with major network earthed system, various supply side AC distribution dresses Electrical equipment in setting then is connected with PE line.
After single-phase earthing occurs for any point in above system structure, loop of electric leakage is as shown in Fig. 2, wherein bold portion Live part is indicated, including charging pile shell and the vehicle connected, to seriously threaten the life of producers and client Life, property safety.Therefore, there are serious security risks for the system structure of existing charging station and its earthed system.
Summary of the invention
The purpose of the utility model is to provide a kind of security risk is lower, so as to the charging station of safe and reliable operation.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of DC charging station earthed system, is set in DC charging station, and the DC charging station includes switchgear house, sets It sets in the indoor distribution transformer of distribution, the supply side AC distribution device, the outdoor base that are connected with the distribution transformer Facility, the charging pile being connected with the distribution transformer, the charging pile include DC equipment in alternating current equipment and stake in stake, DC charging station earthed system includes mutually independent working earthing system, controller switching equipment protective grounding system, charging pile Protective grounding system；
The neutral point of the distribution transformer is connected to the working earthing system by connection cables and draws PE line, In the stake in electrical equipment, the charging pile in the supply side AC distribution device alternating current equipment respectively with the PE Line is connected；
The shell of the supply side AC distribution device, the shell of the distribution transformer, the switchgear house door and window and Roof lightning protection device passes through connection cables and is connected with the controller switching equipment protective grounding system；
Outdoor base setting, the shell of the charging pile and wherein in the stake DC equipment by connection cables with The charging pile protective grounding system is connected；
Connection cables that the controller switching equipment protective grounding system is connected, the charging pile protective grounding system are connected Connection cables, the connection cables that are connected of the working earthing system keep state of insulation between each other.
It is provided with the device PE to insulate with its outer shell phase in the supply side AC distribution device to arrange, the supply side exchange Electrical equipment in power distribution equipment is connected with described device PE row, and described device PE row passes through connection cables and the PE line phase Connection；
It is provided in the charging pile with the casing insulation of the charging pile and mutually insulated exchanges PE row and direct current PE Row, alternating current equipment exchange PE row and is connected with described in the stake in the charging pile, and the exchange PE is arranged and the PE line It is connected, DC equipment is connected with direct current PE row in the stake in the shell of the charging pile, the charging pile, And the direct current PE row is connected with the charging pile protective grounding system.
Described device PE row, exchange PE row, direct current PE row are insulated by insulator respectively.
The controller switching equipment protective grounding system, the charging pile protective grounding system, the working earthing system are two-by-two The distance between be greater than 10m.
The working earthing system includes grounding flat steel, the protecting pipe for protecting the grounding flat steel.
The controller switching equipment protective grounding system, the charging pile protective grounding system include grounded screen.
The supply side AC distribution device includes screen cabinet, power and lighting device, low-tension switch cabinet, high-tension switch cabinet, whole Flow cabinet；The outdoor base setting includes outdoor awning.
The distribution transformer is set in transformer bin, and the transformer bin passes through connection cables and the distribution Equipment protection earthed system is connected.
The quantity of the low-tension switch cabinet is multiple, and integrated elongated PE row is provided in multiple low-tension switch cabinets It is arranged as described device PE.
Since above-mentioned technical proposal is used, the utility model has the advantage that the utility model compared with prior art Earthed system use new ground connection schemes, safety, reliability be significantly improved, and can reduce existing safety Hidden danger ensures life, the property safety of producers and client.
Detailed description of the invention
Attached drawing 1 is the system structure diagram at existing DC charging station.
Attached drawing 2 is band electrical schematic of the existing DC charging station after single-phase earthing occurs.
Attached drawing 3 is the system structure diagram using the DC charging station of the earthed system of the utility model.
Attached drawing 4 is the band electrical schematic using the DC charging station of the earthed system of the utility model after single-phase earthing occurs Figure.
Specific embodiment
Embodiment shown in reference to the accompanying drawing is further described the utility model.
Embodiment one: as shown in Fig. 3, the DC charging station for electric vehicle charging includes switchgear house, distribution transformer, confession Electric top-cross stream power distribution equipment, outdoor infrastructure, several charging piles and earthed system.Wherein, switchgear house includes having door The house of window is equipped with roof lightning protection device on roof；Supply side AC distribution device include screen cabinet, power and lighting device, Low-tension switch cabinet, high-tension switch cabinet, rectifier cabinet etc., each supply side AC distribution device include shell and are arranged in shell Interior electrical equipment；And outdoor base setting then includes outdoor awning etc..
Earthed system in the DC charging station includes 3 sets of mutually independent earthed systems, respectively working earthing system, Controller switching equipment protective grounding system, charging pile protective grounding system.The way of working earthing system is independent neutral point work Ground connection, the way of controller switching equipment protective grounding system are independent power distribution room main grounding grid protective grounding, charging pile protective grounding The way of system is independent charging pile grounded screen protective grounding on the spot.
The output that the indoor distribution transformer of distribution is arranged in has three phase lines and a N line, and its neutral point draws one Bar PE line.The neutral point of the transformer is also directly connected to working earthing system.Supply side AC distribution device respectively with distribution The phase line of transformer is connected with N line and (omits the part connection cables in Fig. 3).Electricity in each supply side AC distribution device Gas equipment is also connected with PE line in addition to being connected with the phase line of distribution transformer and N line.Charging pile includes alternating current equipment in stake With DC equipment in stake, charging pile, which is also connected with the phase line of distribution transformer and N line, (omits the part connecting line in Fig. 3 Cable).
Working earthing system includes grounding flat steel, for the protecting pipe of protective grounding band steel.Controller switching equipment protective grounding system System, charging pile protective grounding system include grounded screen.
Connection structure then in DC charging station about earthed system is as follows:
1, the shell of supply side AC distribution device, the shell of distribution transformer, the door and window of switchgear house and roof lightning protection dress It sets and is connected by connection cables with controller switching equipment protective grounding system.If distribution transformer is set in transformer bin, Then the shell of transformer bin is connected by connection cables with controller switching equipment protective grounding system.
2, DC equipment leads to respectively in the stake that outdoor base is arranged in the shell and charging pile of (i.e. outdoor awning), charging pile Connection cables are crossed to be connected with charging pile protective grounding system.
3, the electrical equipment in supply side AC distribution device, alternating current equipment passes through connecting line respectively in the stake in charging pile Cable is connected with PE line, to be connected to solidly earthed neutral system.
Also, connection cables that controller switching equipment protective grounding system is connected, charging pile protective grounding system are connected The connection cables that connection cables, working earthing system are connected keep state of insulation between each other, i.e., real without any electrical connection Existing 3 sets of earthed systems are mutually indepedent.Controller switching equipment protective grounding system, charging pile protective grounding system, working earthing system two The distance between two are greater than 10m.
Specifically, supply side AC distribution device is provided with the device PE to insulate with its outer shell phase and is arranged, then supplied Electrical equipment in electric top-cross stream power distribution equipment is connected with device PE row, and device PE row is connected by connection cables with PE line It connects.Device PE row need to be insulated in the shell of electric top-cross stream power distribution equipment by several insulators.And for low Compress switch cabinet, if its quantity be it is multiple, integrated elongated PE row can be provided in multiple low-tension switch cabinets as device PE row, elongated PE row also need to install by insulator, so that the shell with low-tension switch cabinet keeps insulating.
For charging pile, be provided with its casing insulation and mutually insulated exchange PE row (for zero line protection) and Direct current PE row (is used for protective grounding), and the two also realizes insulating mounting by insulator respectively.Exchange in stake in charging pile Equipment with exchange PE row be connected, and exchange PE row be then connected with PE line, thus in stake alternating current equipment by exchange PE row and PE line realizes the connection with working earthing system.In stake in the shell of charging pile, charging pile DC equipment (charging gun) with Direct current PE row is connected, and direct current PE row is connected with charging pile protective grounding system.
For the DC charging station of above system structure, since its supply side AC distribution device is the same as outdoor charging pile region Earthed system separate, it is shown in solid in its loop of electric leakage such as attached drawing 4 after shell single-phase earthing occurs., it is apparent that By separating controller switching equipment main grounding grid and outdoor charging pile region main grounding grid, zero line protection, that is, working earthing connection is constant TN-S system design and installation, the fault coverage after being grounded can be further reduced, regardless of distribution system what point generation The vehicle of single-phase earthing (electric leakage) failure, charging pile shell and the connection of charging gun PE line would be impossible to most close with electric leakage again Key, charging that is most important, most ideally having ensured client safety.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention. All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it It is interior.

Claims (9)

1. a kind of DC charging station earthed system, is set in DC charging station, the DC charging station includes switchgear house, setting It is set in the indoor distribution transformer of distribution, the supply side AC distribution device, the outdoor base that are connected with the distribution transformer The charging pile applied, be connected with the distribution transformer, the charging pile include DC equipment in alternating current equipment and stake in stake, Be characterized in that: DC charging station earthed system includes mutually independent working earthing system, controller switching equipment protective grounding system System, charging pile protective grounding system；
The neutral point of the distribution transformer is connected to the working earthing system by connection cables and draws PE line, described In the stake in electrical equipment, the charging pile in supply side AC distribution device alternating current equipment respectively with the PE line phase Connection；
The shell of the supply side AC distribution device, the shell of the distribution transformer, the switchgear house door and window and roof Lightning protection device passes through connection cables and is connected with the controller switching equipment protective grounding system；
Outdoor base setting, the shell of the charging pile and wherein in the stake DC equipment by connection cables with it is described Charging pile protective grounding system is connected；
The company that connection cables that the controller switching equipment protective grounding system is connected, the charging pile protective grounding system are connected The connection cables that wiring cable, the working earthing system are connected keep state of insulation between each other.
2. DC charging station according to claim 1 earthed system, it is characterised in that: the supply side AC distribution device In be provided with the device PE to insulate with its outer shell phase and arrange, electrical equipment and described device in the supply side AC distribution device PE row is connected, and described device PE row is connected by connection cables with the PE line；
It is provided in the charging pile with the casing insulation of the charging pile and mutually insulated exchanges PE row and direct current PE row, institute It states in the stake in charging pile alternating current equipment to exchange PE row with described and be connected, the exchange PE is arranged to be connected with the PE line It connects, DC equipment is connected with direct current PE row in the stake in the shell of the charging pile, the charging pile, and institute Direct current PE row is stated to be connected with the charging pile protective grounding system.
3. DC charging station according to claim 2 earthed system, it is characterised in that: described device PE row, the exchange PE row, direct current PE row are insulated by insulator respectively.
4. DC charging station according to claim 1 earthed system, it is characterised in that: controller switching equipment protective grounding system System, the charging pile protective grounding system, the distance of the working earthing system between any two are greater than 10m.
5. DC charging station according to claim 1 earthed system, it is characterised in that: the working earthing system includes connecing Ground band steel, the protecting pipe for protecting the grounding flat steel.
6. DC charging station according to claim 1 earthed system, it is characterised in that: controller switching equipment protective grounding system System, the charging pile protective grounding system include grounded screen.
7. DC charging station according to claim 1 earthed system, it is characterised in that: the supply side AC distribution device Including shielding cabinet, power and lighting device, low-tension switch cabinet, high-tension switch cabinet, rectifier cabinet；The outdoor base setting includes outdoor rain Canopy.
8. DC charging station according to claim 1 earthed system, it is characterised in that: the distribution transformer is set to change In depressor bin, the transformer bin is connected by connection cables with the controller switching equipment protective grounding system.
9. DC charging station according to claim 7 earthed system, it is characterised in that: the quantity of the low-tension switch cabinet is It is multiple, and be provided with integrated elongated PE row in multiple low-tension switch cabinets and arranged as described device PE.
CN201821607836.8U 2018-09-30 2018-09-30 DC charging station earthed system Active CN208867867U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821607836.8U CN208867867U (en) 2018-09-30 2018-09-30 DC charging station earthed system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821607836.8U CN208867867U (en) 2018-09-30 2018-09-30 DC charging station earthed system

Publications (1)

Publication Number Publication Date
CN208867867U true CN208867867U (en) 2019-05-17

Family

ID=66469262

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821607836.8U Active CN208867867U (en) 2018-09-30 2018-09-30 DC charging station earthed system

Country Status (1)

Country Link
CN (1) CN208867867U (en)

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