CN102355023B - Light-storage type EV (electric vehicle) charging and converting station - Google Patents

Light-storage type EV (electric vehicle) charging and converting station Download PDF

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Publication number
CN102355023B
CN102355023B CN2011103021434A CN201110302143A CN102355023B CN 102355023 B CN102355023 B CN 102355023B CN 2011103021434 A CN2011103021434 A CN 2011103021434A CN 201110302143 A CN201110302143 A CN 201110302143A CN 102355023 B CN102355023 B CN 102355023B
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station
energy
load
power supply
batteries
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CN102355023A (en
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徐冰亮
董尔佳
武国良
徐明宇
陈晓光
穆兴华
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Heilongjiang Electric Power Co Ltd
Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Heilongjiang Electric Power Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a light-storage type EV (electric vehicle) charging and converting station, belonging to the field of power supply systems. The station is used for solving the problems caused by taking an alternating current power grid as a power supply source in the existing EV charging and converting station. The light-storage type EV charging and converting station comprises a photovoltaic generating system, a storage battery energy accumulation system, an EV charging station and a station-used load, wherein the photovoltaic generating system comprises a solar battery assembly, a grid connected inverter and a photovoltaic power supply management system, and is suspended on a power supply bus of the photovoltaic system; the storage battery energy accumulation system comprises a storage battery pack, a battery management system and a dual-direction inverter, and is suspended on a power supply bus of the load; the EV charging and converting station and the station-used load are suspended on the power supply load of the load; and the power supply bus of the photovoltaic system and the power supply bus of the load are respectively connected with a 380V bus in the alternating current power grid, and are connected by a photovoltaic access breaker.

Description

Light storage formula electric vehicle charging electrical changing station
Technical field
The present invention relates to light storage formula electric vehicle charging electrical changing station, belong to the electric power system field.
Background technology
At present, the countries such as the U.S., Japan, Israel, France, Britain have all begun to build charging electric vehicle facility separately, and mainly to be charged as the master, wherein the U.S., Israel are carrying out related work aspect electrical changing station.State Grid Corporation of China proposed the pattern to charging electric vehicle in 2010 " it is main changing electricity, insert fill be auxiliary, concentrate charging, unified dispensing " principle.2011, State Grid Corporation of China built up the first electric automobile intelligence of China and fills and change electric service network in Zhejiang, was also firstly in the world to realize that intercity interconnected electric automobile intelligence is filled and change electric service network, and the electrical changing station of China has been walked the leading position in the world.
therefore construction is filled electrical changing station intelligence and is filled the most important thing of changing electric service network, and the clean reproducible energy generating is the important means that solves energy problem, become the our times development trend, therefore the construction of electric vehicle charging electrical changing station is generated electricity in conjunction with clean reproducible energy, the i.e. pattern of " clean reproducible energy generating → energy storage → fill and change electricity ", this pattern not only can reduce electric vehicle charging and change electricity to the impact of electrical network, clean environment firendly more, and can be in the remote districts construction that the electrical network condition does not possess, or on long-distance highway as the emergent charging facility, therefore this pattern is filled the research of electrical changing station and is built promoting the application of electric automobile, build energy saving and environment friendly social important in inhibiting, boundless application prospect will be arranged.
Current, there is following problem in the electric vehicle charging electrical changing station take AC network as power supply source: one, nervous because of the national grid resource, therefore relying on national grid fully can increase burden to country; Two, present, electric automobile charging station scarcely configures batteries, when grid power blackout, can't charge for electric automobile; Although and electric automobile charging station configures a large amount of batteries, the electric automobile that can satisfy when grid power blackout to a certain degree changes electric demand, when electrical network has a power failure for a long time, just can't satisfy electric automobile and change electric demand.
Summary of the invention
The present invention seeks to fill in order to solve existing electrical automobile the problem that electrical changing station exists take AC network as power supply source: one, nervous because of the national grid resource, therefore relying on national grid fully can increase burden to country; Two, present, electric automobile charging station scarcely configures batteries, when grid power blackout, can't charge for electric automobile; Although and electric automobile charging station configures a large amount of batteries, when grid power blackout, the electric automobile that can satisfy to a certain degree changes electric demand, when electrical network has a power failure for a long time, just can't satisfy electric automobile and change electric demand.
Light storage formula electric vehicle charging electrical changing station of the present invention, it comprises photovoltaic generating system, energy-storage system of accumulator, electric automobile charging station, stand with load, main circuit breaker, photovoltaic system be incorporated into the power networks circuit breaker, load breaker, photovoltaic access circuit breaker, solar module circuit breaker and batteries circuit breaker
Described photovoltaic generating system comprises solar module, combining inverter and photovoltaic power supply management system, the output of photovoltaic power supply management system is connected with the control end of solar module, the dc output end of solar module is connected with the direct-flow input end of combining inverter, the ac output end of combining inverter is connected with an end of solar module circuit breaker, and the other end of solar module circuit breaker is articulated on the photovoltaic system power supply buses;
Described energy-storage system of accumulator comprises batteries, battery management system and two-way inverter, the output of battery management system is connected with the control end of batteries, the electric energy input/output terminal of batteries is connected with an end of two-way inverter, the other end of two-way inverter is connected with an end of batteries circuit breaker, and the other end of batteries circuit breaker is articulated on the load power supply buses;
Electric automobile charging station and station all are articulated on the load power supply buses with load;
Described photovoltaic system power supply buses is connected with the 380V bus that AC network is divided into by the photovoltaic system circuit breaker that is incorporated into the power networks,
The 380V bus that described load power supply buses is divided into by load breaker and AC network is connected,
Access circuit breaker by photovoltaic between described photovoltaic system power supply buses and described load power supply buses and be connected,
Between AC network and described 380V bus, main circuit breaker is set.
Advantage of the present invention: light storage formula electric vehicle charging electrical changing station of the present invention can be realized the charge mode of accumulator of electric car and change power mode.The present invention has well solved in generation of electricity by new energy, photovoltaic generation and charging electric vehicle and the problem of changing electric combination.Its extensive application can be alleviated the present situation of national grid anxiety, and guarantees when the normal operation of electrical network and electrical network break down, charging electric vehicle work and change electric carrying out smoothly of working.
Light storage formula electric vehicle charging electrical changing station provides electric power by photovoltaic generating system, the used for electric vehicle storage battery is as energy-storage units, whole system is incorporated urban power distribution network into, both can realize charging electric vehicle, change electric needs, can provide emergency power supply for power distribution network again, due to the cushioning effect of energy-storage system of accumulator, reduced the fluctuation of photovoltaic generation to the impact of electrical network simultaneously.
Description of drawings
Fig. 1 is the structural representation of light storage formula electric vehicle charging electrical changing station;
Fig. 2 is the structural representation of photovoltaic generating system;
Fig. 3 is the structural representation of energy-storage system of accumulator;
Fig. 4 is that light storage formula electric vehicle charging electrical changing station is in lonely net, the switched system schematic diagram when being incorporated into the power networks;
Fig. 5 is at solar radiation and the energy flow schematic diagram when bright and clear, and the energy that solar module sends with the load power supply, is the batteries energy storage to charging station and station simultaneously, and unnecessary electric power is sent into electrical network;
Fig. 6 is having solar radiation, but use with load at the inadequate charging station of output energy of solar module and station the output energy of the output energy of solar module and batteries close enough energy flow schematic diagram when charging station and station using with load, batteries and the solar module while is to charging station and stand and provide energy with loading at this moment;
Fig. 7 is having solar radiation, but the output energy of solar module and batteries close inadequate charging station and the station energy flow schematic diagram when using with load, this moment, batteries, solar module and AC network provided energy to charging station and station with loading simultaneously;
Fig. 8 is having solar radiation, but use with load at the inadequate charging station of output energy of solar module and station, and the energy flow schematic diagram when batteries can't be exported energy, this moment, AC network also provided energy to charging station and station with load, and batteries begins energy storage simultaneously;
Fig. 9 be all the time according to or the solar module output energy flow schematic diagram when being not enough to provide energy to charging station and station with loading, powered with load to charging station and station by the single energy of batteries, the prerequisite of this operational mode is that the output energy of batteries can satisfy the demands;
Figure 10 be all the time according to or the solar module output energy flow schematic diagram when being not enough to provide energy to charging station and station with loading, powered with load to charging station and station by the single energy of AC network, the prerequisite of this operational mode is that batteries can't be exported energy;
Figure 11 be all the time according to or solar module output be not enough to provide energy to charging station and station with loading, and the energy flow schematic diagram when the output energy of batteries also can't satisfy the demands, this moment, AC network provided energy to charging station and station with load.
Embodiment
Embodiment one: below in conjunction with Fig. 1 to 11 explanation present embodiment, the described light storage of present embodiment formula electric vehicle charging electrical changing station, it comprises photovoltaic generating system, energy-storage system of accumulator, electric automobile charging station 6, stand with load 7, main circuit breaker 8, photovoltaic system be incorporated into the power networks circuit breaker 9, load breaker 10, photovoltaic access circuit breaker 11, solar module circuit breaker 12 and batteries circuit breaker 13
Described photovoltaic generating system comprises solar module 1, combining inverter 2 and photovoltaic power supply management system 14, the output of photovoltaic power supply management system 14 is connected with the control end of solar module 1, the dc output end of solar module 1 is connected with the direct-flow input end of combining inverter 2, the ac output end of combining inverter 2 is connected with an end of solar module circuit breaker 12, and the other end of solar module circuit breaker 12 is articulated on the photovoltaic system power supply buses;
Described energy-storage system of accumulator comprises batteries 3, battery management system 4 and two-way inverter 5, the output of battery management system 4 is connected with the control end of batteries 3, the electric energy input/output terminal of batteries 3 is connected with an end of two-way inverter 5, the other end of two-way inverter 5 is connected with an end of batteries circuit breaker 13, and the other end of batteries circuit breaker 13 is articulated on the load power supply buses;
Electric automobile charging station 6 and station all are articulated on the load power supply buses with load 7;
Described photovoltaic system power supply buses is connected with the 380V bus that AC network is divided into by the photovoltaic system circuit breaker 9 that is incorporated into the power networks,
The 380V bus that described load power supply buses is divided into by load breaker 10 and AC network is connected,
Access circuit breaker 11 by photovoltaic between described photovoltaic system power supply buses and described load power supply buses and be connected,
Between AC network and described 380V bus, main circuit breaker 8 is set.
Photovoltaic generating system is selected the scheme that is incorporated into the power networks of decentralized, decentralized and net mode are the roofs that the small-sized combining inverter of selection outdoor is arranged on the building, the direct current that photovoltaic module is produced directly becomes the 380V alternating current, incorporates power distribution network into after then the AC of every small-sized inverter being confluxed.
The below defines micro-grid system, and in present embodiment, micro-grid system comprises that photovoltaic generating system, energy-storage system of accumulator, electric automobile charging station 6 and station are with loading 7.
Micro-grid system is operated in lonely net and the two states that is incorporated into the power networks.
During described lonely Running State, it when sunny, is the power supply of whole station by photovoltaic generating system daytime; Not enough at sunlight, when the photovoltaic generation deficiency is thought the power supply of whole station, jointly provide electric energy for whole station by energy-storage system of accumulator and photovoltaic system.When night, provide electric energy for whole station separately by energy-storage system of accumulator.
Described being incorporated into the power networks during state when sunny, is the power supply of whole station by photovoltaic generating system daytime; When sunlight is not enough, when the photovoltaic generation deficiency is thought the power supply of whole station, be the power supply of whole station by photovoltaic generating system and electrical network.When night, provide electric energy by electrical network for whole station.
Described electric automobile charging station 6 is the electrically-charging equipments that provide fast, charge at a slow speed for electric automobile.
Exist energy flow between each parts of the described light storage of present embodiment formula electric vehicle charging electrical changing station, have seven kinds of patterns.These seven kinds of patterns are mainly carried out with the stored energy situation of payload, storage battery according to intensity of illumination, charging station and station:
Pattern 1: referring to Fig. 5, in solar radiation and when bright and clear, the energy that solar module sends with the load power supply, is the batteries energy storage to charging station and station simultaneously, and unnecessary electric power is sent into electrical network;
Pattern 2: referring to Fig. 6, solar radiation is being arranged, the closing enough of output energy of the output energy of solar module and batteries used with load as charging station and station but use with load at the inadequate charging station of output energy of solar module and station, and this moment, batteries and solar module provided energy to charging station and station with load simultaneously;
Mode 3: referring to Fig. 7, solar radiation is being arranged, but the output energy of solar module and batteries close inadequate charging station and station when using with load, this moment, batteries, solar module and AC network provided energy to charging station and station with loading simultaneously;
Pattern 4: referring to Fig. 8, solar radiation is being arranged, but use with load at the inadequate charging station of output energy of solar module and station, and the energy flow schematic diagram when batteries can't be exported energy, this moment, AC network also provided energy to charging station and station with load, and batteries begins energy storage simultaneously;
Pattern 5, referring to Fig. 9, all the time according to or the solar module output energy flow schematic diagram when being not enough to provide energy to charging station and station with loading, powered with load to charging station and station by the single energy of batteries, the prerequisite of this operational mode is that the output energy of batteries can satisfy the demands;
Pattern 6: referring to Figure 10, all the time according to or solar module output when being not enough to provide energy to charging station and station with loading, powered with load to charging station and station by the single energy of AC network, the prerequisite of this operational mode is that batteries can't be exported energy;
Mode 7: referring to Figure 11, all the time according to or solar module output be not enough to provide energy to charging station and station with load, and the output energy of batteries be also can't satisfy the demands the time, this moment, AC network provided energy to charging station and station with loading.
Embodiment two: present embodiment further illustrates execution mode one, it also comprises monitoring system 15 processed, monitoring system 15 processed is articulated on the load power supply buses, monitors system 15 processed and comprises power supply monitoring system, charging monitoring system, power quality supervisory information system and video monitoring system
Described power supply monitoring system is used for the ruuning situation of monitoring electric power system, comprises showing the electric power system main electrical scheme, and the electric parameters such as detection power, electric weight and electric current, described electric power system comprises photovoltaic generating system and AC network;
The charge information of described charging monitoring system monitoring accumulator of electric car, charged state, charging clearing situation;
Described power quality supervisory information system is used for the monitoring quality of power supply, monitoring current resultant distortion rate, voltage resultant distortion rate, each primary current aberration rate and each time voltage distortion;
Described video monitoring system, the security situation for monitoring electric automobile charging station 6 monitors electric automobile charging station 6 by camera.
Electric power system is mainly charging device power supply is provided, and simultaneously also for the stations such as supervisory control system, illumination provide power supply with load, is the basis of whole charging station operation.Electric power system is responsible on the one hand whole charging station power supply is provided, and is responsible on the other hand providing power supply to exchanging stake.The output of photovoltaic generating system accesses this power distribution cabinet, for the a.c. electric car charging station provides electric power.Electric power system is by electrical network and photovoltaic generating system power supply.The core of charging system electric automobile charging station comprises the facilities such as charging cabinet, electric automobile charging station and circuit.Electric automobile charging station is the electrically-charging equipment that provides fast, charges at a slow speed for electric automobile.Electric automobile charging station comprises direct current drive vehicle charging station and a.c. electric car charging station.Supervisory control system is the safeguards system of light storage formula electric vehicle charging electrical changing station safe operation.
Embodiment three: present embodiment is described below in conjunction with Fig. 3, present embodiment further illustrates execution mode one, battery management system 4 utilize temperature sensor gather batteries 3 temperature signal, utilize Hall element to gather current signal and the voltage signal of batteries 3; According to the dump energy of the Signal estimation batteries 3 that gathers, report to the police when the too low or too high for voltage or excess Temperature of batteries 3; The energy of 4 pairs of batteries 3 of battery management system carries out equilibrium, guarantees the consistency of each electric quantity of single batteries in batteries 3; The information exchange of batteries 3 is crossed 485 buses to battery management system 4 or the CAN bus sends to photovoltaic power supply management system 14.

Claims (1)

1. light stores up formula electric vehicle charging electrical changing station, it is characterized in that, it comprises photovoltaic generating system, energy-storage system of accumulator, electric automobile charging station (6), stand with load (7), main circuit breaker (8), photovoltaic system be incorporated into the power networks circuit breaker (9), load breaker (10), photovoltaic access circuit breaker (11), solar module circuit breaker (12), batteries circuit breaker (13) and supervisory control system (15)
Described photovoltaic generating system comprises solar module (1), combining inverter (2) and photovoltaic power supply management system (14), the output of photovoltaic power supply management system (14) is connected with the control end of solar module (1), the dc output end of solar module (1) is connected with the direct-flow input end of combining inverter (2), the ac output end of combining inverter (2) is connected with an end of solar module circuit breaker (12), and the other end of solar module circuit breaker (12) is articulated on the photovoltaic system power supply buses;
Described energy-storage system of accumulator comprises batteries (3), battery management system (4) and two-way inverter (5), the output of battery management system (4) is connected with the control end of batteries (3), the electric energy input/output terminal of batteries (3) is connected with an end of two-way inverter (5), the other end of two-way inverter (5) is connected with an end of batteries circuit breaker (13), and the other end of batteries circuit breaker (13) is articulated on the load power supply buses;
Electric automobile charging station (6) and station all are articulated on the load power supply buses with load (7);
Described photovoltaic system power supply buses is connected with the 380V bus that AC network is divided into by the photovoltaic system circuit breaker (9) that is incorporated into the power networks,
The 380V bus that described load power supply buses is divided into by load breaker (10) and AC network is connected,
Access circuit breaker (11) by photovoltaic between described photovoltaic system power supply buses and described load power supply buses and be connected,
Between AC network and described 380V bus, main circuit breaker (8) is set;
Supervisory control system (15) is articulated on the load power supply buses, and supervisory control system (15) comprises power supply monitoring system, charging monitoring system, power quality supervisory information system and video monitoring system,
Described power supply monitoring system is used for the ruuning situation of monitoring electric power system, comprises showing the electric power system main electrical scheme, and detection power, electric weight and electric current, described electric power system comprises photovoltaic generating system and AC network;
The charge information of described charging monitoring system monitoring accumulator of electric car, charged state, charging clearing situation;
Described power quality supervisory information system is used for the monitoring quality of power supply, monitoring current resultant distortion rate, voltage resultant distortion rate, each primary current aberration rate and each time voltage distortion;
Described video monitoring system, the security situation for monitoring electric automobile charging station (6) monitors electric automobile charging station (6) by camera;
Supervisory control system (15) is switched with stored energy situation intelligence in seven kinds of mode of operations of load (7) size, batteries (3) according to intensity of illumination, electric automobile charging station (6) and station:
Pattern 1: in solar radiation and when bright and clear, the energy that solar module (1) sends with load (7) power supply, is batteries (3) energy storage to electric automobile charging station (6) and station simultaneously, and unnecessary electric power is sent into electrical network;
Pattern 2: solar radiation is being arranged, the closing enough of output energy of the output energy of solar module (1) and batteries (3) used with load (7) as electric automobile charging station (6) and station but use with load (7) at the inadequate electric automobile charging station of output energy (6) of solar module (1) and station, and batteries this moment (3) provides energy to electric automobile charging station (6) and station with load (7) simultaneously with solar module (1);
Mode 3: solar radiation is being arranged, but when used with load (7) at the inadequate electric automobile charging station of output energy sum (6) of solar module (1) and batteries (3) and station, batteries (3), solar module (1) and AC network provided energy to electric automobile charging station (6) and station with load (7) simultaneously at this moment;
Pattern 4: solar radiation is being arranged, but use with load (7) at the inadequate electric automobile charging station of output energy (6) of solar module (1) and station, and when batteries (3) can't be exported energy, AC network also provides energy to electric automobile charging station (6) and station with load (7), the energy storage of batteries (3) beginning simultaneously;
Pattern 5, all the time according to or solar module (1) output be not enough to electric automobile charging station (6) and station with loading (7) when energy is provided, powered with load (7) to electric automobile charging station (6) and station by the single energy of batteries (3), the prerequisite of this operational mode is that the output energy of batteries (3) can satisfy the demands;
Pattern 6: all the time according to or solar module (1) output be not enough to electric automobile charging station (6) and station with loading (7) when energy is provided, powered with load (7) to electric automobile charging station (6) and station by the single energy of AC network, the prerequisite of this operational mode is that batteries (3) can't be exported energy;
Mode 7: all the time according to or solar module (1) output be not enough to provide energy to electric automobile charging station (6) and station with load (7), and when the output energy of batteries (3) also can't satisfy the demands, this moment, AC network provided energy to electric automobile charging station (6) and station with load (7).
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