CN110171323A - A kind of electric car charge-discharge control system and application method based on V2G - Google Patents
A kind of electric car charge-discharge control system and application method based on V2G Download PDFInfo
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- CN110171323A CN110171323A CN201910482850.2A CN201910482850A CN110171323A CN 110171323 A CN110171323 A CN 110171323A CN 201910482850 A CN201910482850 A CN 201910482850A CN 110171323 A CN110171323 A CN 110171323A
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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
- B60L53/20—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 characterised by converters located in the vehicle
- B60L53/24—Using the vehicle's propulsion converter for charging
-
- 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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- 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
- B60L2210/00—Converter types
- B60L2210/40—DC to AC converters
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of electric car charge-discharge control system and application method based on V2G, wherein charge-discharge control system includes: entire car controller, electricity drives control system, power battery and battery management system, in which: the electric drive system includes DC/AC converter and motor；Entire car controller unidirectionally receives external information, and respectively with battery management system and DC/AC converter two-way exchange information；Battery management system includes power battery, and power battery and DC/AC converter are electrically connected；DC/AC converter and electrical connection of motor, motor and power grid are electrically connected；When motor and power grid disconnect, DC/AC convertor controls motor speed, torque output, when motor connect with power grid, when entire car controller is integrated delivering charge and discharge and instructed, DC/AC converter is power battery charge and discharge.The configuration of the present invention is simple effectively increases interior space utilization rate and charge-discharge electric power, ensure that user benefit.
Description
Technical field
The invention belongs in electric car intelligent recharge and discharge technical field, in particular to a kind of electric car based on V2G
Charge-discharge control system and application method.
Background technique
Electric car (Electric Vehicle, EV) is used as a kind of clean energy resource vehicles, has using energy source effect
The features such as rate is high, environmentally friendly, becomes the main direction of development of future transportation tool.V2G is Vehicle-to-grid (vehicle to electricity
Net) abbreviation, which depict the relationship of electric car and power grid, the system that the electric energy of on-vehicle battery can be sold to power grid, such as
Fruit on-vehicle battery needs to charge, and electric current then flows to vehicle by power grid.
Studies have shown that the per day running time of electric car for being more than 90% is about 1 hour or so, they are most of
Time in always be in dead ship condition, this actually represents a kind of idle resource.As halted state can will be in
Electric car accesses power grid, and when automobile quantity is enough, they both can absorb energy in low power consumption from power grid,
Energy can be fed back into power grid in peak of power consumption, to reduce day power load peak-valley difference, be of great significance, show with
Under several aspects:
(1) V2G technology can provide huge energy snubber for power grid, be conducive to the stabilization and reliability service of power grid, and
The cost of electric system operation can be reduced；
(2) during V2G, electric car can participate in the ancillary services such as peak regulation, frequency modulation, and automobile user can borrow
This obtains extra returns, to reduce the use cost of electric car, is conducive to the universal of new-energy automobile；
(3) in the long run, the investment to infrastructure, and popularizing due to new-energy automobile are advantageously reduced, it can
To reduce greenhouse gas emission, to environmental beneficial.
The design realization of V2G charge-discharge machine is intelligent power grid technology, mechanics of communication, detection technique, modern power electronic skill
The synthesis of art, modern energy storage technology.Therefore the research and development of V2G charge-discharge machine can promote multidisciplinary including communication, IT, electrical etc.
The progress in field, the realization of V2G charge-discharge machine can be brought most realistic for society so that V2G technology is no longer empty talk
Economic benefit.Thus the research of V2G charge-discharge machine has vast potential for future development and practical benefit.
Realize V2G technology, V2G charge-discharge machine is that wherein essential key equipment, performance will directly affect V2G
The function of technology is realized and actual effect.V2G schematic diagram is as shown in Figure 1.
The utilization efficiency of energy can be improved in efficient V2G charge-discharge machine, reduces electric energy loss；The charge and discharge of quick response
Function improves the rate of electric energy bi-directional conversion, improves power grid and adjusts efficiency；The charge-discharge machine of real time communication is able to achieve power grid to electricity
The real-time monitoring of energy improves operation of power networks efficiency.Traditional vehicle-mounted charge-discharge machine and electricity drive schematic diagram are as shown in Figure 2.
Patent CN104158259B uses the vehicle-mounted charge-discharge system based on V2G technology, the vehicle-mounted charge and discharge based on V2G technology
Electric system includes vehicle end and charging pile end, and two-way exchange charge and discharge stake is connect with two-way exchange charge-discharge machine, transformer respectively,
Transformer is connect with power grid.Patent CN105438003B provides a kind of based on electric automobile and vehicle-mounted charger and electric machine controller
Integrated morphology.The structure includes Vehicular charger and electric machine controller integration module and cooling line.Vehicular charger and motor
Originally the charger module separated and electric machine controller module are carried out IC design by controller integration module, and the two is total
With device for power switching and communication control module.Cooling line is that Vehicular charger and electric machine controller integration module carry out water
It is cold, save the vehicle space structure of electric car.Patent CN105515140B Vehicular charger includes connecing with AC charging
The AC charging module of mouth, further includes direct-current charging interface and boost DC-DC module, the rectification of the AC charging inside modules
DC bus after bridge connects the direct-current charging interface, and the direct-current charging interface is used to be connected to external direct current and quickly fills
Electric stake is to carry out fast-speed direct current charging.
The prior art has the following problems:
1. increasing charge-discharge machine device, to increase spatial design pressure in the limited space of electric car；
2. being limited by electric car space, vehicle-mounted charge-discharge machine power handling capability is limited, is typically only capable to provide low current
It charges at a slow speed.
Summary of the invention
In order to overcome the technical problems existing in the prior art, one aspect of the invention provides a kind of electricity based on V2G
Electrical automobile charge-discharge control system, including entire car controller, electric drive system, power battery and battery management system, in which:
Electric drive system includes DC/AC converter and motor；
Entire car controller unidirectionally receives external information, and respectively with battery management system and DC/AC converter two-way exchange
Information；
Battery management system includes power battery, and power battery and DC/AC converter are electrically connected；DC/AC converter with
Electrical connection of motor, motor and power grid are electrically connected；
When motor and power grid disconnect, DC/AC convertor controls motor speed, torque output, when motor and power grid connect
When connecing, when entire car controller integrates delivering charge and discharge instruction, DC/AC converter is power battery charge and discharge.
Preferably, being provided with switch between motor and power grid.
Further, motor stator side winding passes through switch access power grid.
Preferably, switch is three, stator side winding passes through three switches respectively and carries out star-like connection.
Further, entire car controller controls the electric energy of power battery according to the carrying capacity of the dispatch command of power grid and battery
It flows to power grid or controls the power flow power battery of power grid.
Another aspect of the invention provides a kind of electric car charge and discharge control system including above-described based on V2G
The application method of system, includes the following steps:
S1: the stator side winding of motor is accessed power distribution network by electric car parking；
S2: entire car controller receives electric network information；
S3: entire car controller carries out judging whether to need charge or discharge according to the charge and discharge strategy of setting；
S4: charge or discharge finishes, and disconnects the connection of motor and power grid.
Further, the charge and discharge strategy in step S2 includes the following steps:
S21: the battery charge amount of the power battery of current electric car is obtained；
S22: battery charge amount is compared with charge threshold: if battery charge amount is lower than charge threshold, power grid pair
Power battery charges.
S23: if battery charge amount is higher than charge threshold, judge whether power grid instruction charges: if so, power grid is to power
Battery charges；Otherwise judge whether power grid instruction discharges.
Further, further include following steps:
S24: if so, power battery discharges to power grid；Otherwise judge whether night.
Further, further include following steps:
S25: if so, power grid charges to power battery；Otherwise power battery discharges to power grid.
Preferably, electric car is to be connected to power supply facilities by charge and discharge and measuring equipment.
A kind of electric car charge-discharge control system and application method based on V2G of the invention has below beneficial to effect
Fruit:
1. simplifying system, increase interior space utilization rate；
2. increasing V2G charge-discharge electric power processing capacity, faster charge and discharge can be realized according to the actual situation；
3. Optimal Control Strategy while meeting grid side demand and SOC situation, guarantees to use from user perspective
The maximization of family interests.
Detailed description of the invention
Comprising in the present specification and constituting the attached drawing of this specification a part and showing and meet the device of the invention and side
The embodiment of method, and meet advantages of the present invention and principle for explaining together with detailed description.
Fig. 1 is V2G technology schematic diagram in the prior art；
Fig. 2 is that vehicle-mounted charge-discharge machine and electricity drive structural schematic diagram in the prior art；
Fig. 3 is that the structure of the electric car charge-discharge control system based on V2G of a preferred embodiment of the invention is shown
It is intended to；
Fig. 4 is the stator winding structure optimization schematic diagram of charge-discharge control system of the invention；
Fig. 5 is that non-residential area working day parking per unit value changes over time curve graph；
Fig. 6 is that residential area working day parking per unit value changes over time curve graph；
Fig. 7 is electric car V2G implementation pattern schematic diagram of the invention.
Specific embodiment
The specific embodiment that the invention will now be described in detail with reference to the accompanying drawings.However, the invention is not limited to be described below
Embodiment.In addition, as long as technical characteristic involved in the various embodiments of the present invention described below is each other
Not constituting conflict can be combined with each other, and technical concept of the invention can with other well-known techniques or with those well-known techniques
Identical other technologies combination is implemented.
Unless otherwise instructed, the herein presented qualifier similar to " first ", " second " is not meant that suitable to the time
The restriction of sequence, quantity or importance, and be used for the purpose of the technical characteristic and another technology in the technical program
Feature is mutually distinguished.Similarly, the modifier similar to " about ", " approximatively " occurred before number herein generally comprises this
Number, and its specific meaning should understand in conjunction with context meaning.Similarly, only there is the name of specific quantity quantifier modification
Otherwise word should be regarded as again including plural form comprising singular herein, both may include in the technical scheme
The singular technical characteristic, also may include a plurality of technical characteristics.
In the explanation of embodiments above, directional terminology "upper", "lower", " left side ", " right side ", "top", "bottom", " perpendicular
To ", the use of " transverse direction " and " lateral " etc. only merely for the purpose convenient for description, should not be taken as restrictive.
A preferred embodiment of the invention provides a kind of electric car charge-discharge control system based on V2G, such as Fig. 3
It is shown, comprising: including entire car controller, electric drive system, power battery and battery management system, in which:
Electric drive system includes DC/AC converter and motor；Entire car controller unidirectionally receives external information, and respectively with electricity
Pond management system BMS (Battery Management System) and DC/AC converter two-way exchange information；Battery management system
System includes power battery, and power battery and DC/AC converter are electrically connected；DC/AC converter and electrical connection of motor, motor with
Power grid is electrically connected；
When motor and power grid disconnect, DC/AC convertor controls motor speed, torque output, when motor and power grid connect
When connecing, when entire car controller integrates delivering charge and discharge instruction, DC/AC converter is power battery charge and discharge.
It originally is in embodiment, as shown in figure 4, being provided with switch between motor and power grid.Motor stator side winding is by opening
Close access power grid.Switch is three, and stator side winding passes through three switches respectively and carries out star-like connection.
Motor stator side winding is optimized, draws interface, power supply network interaction energy, when electric car normally travel,
It is disconnected with power grid, the output such as DC/AC convertor controls motor speed, torque, when electric car stopping is connect with power grid, vehicle
When controller integrates delivering charge and discharge instruction, DC/AC convertor controls grid side input and output electric current is battery charge and discharge
Electricity.
Stator side winding carries out star-like connection by switch S1, S2, S3.When electric car does not access power grid, three-phase is simultaneously
Net switch disconnects, switch S1, S2, S3 closure, the output such as DC/AC convertor controls motor speed, torque；When electric car accesses
When power grid, three-phase grid is closed the switch, and switch S1, S2, S3 disconnection, DC/AC converter accesses power grid by stator winding, with electricity
Net carries out energetic interaction.
Entire car controller controls the power flow electricity of power battery according to the carrying capacity of the dispatch command of power grid and battery
Net or the power flow power battery for controlling power grid.
Vehicle-mounted charge-discharge machine can be issued defeated with and without information such as function demand and prices, or according to power grid according to power grid
The electric characteristic (such as voltage, frequency fluctuation) of outgoing interface, in conjunction with the state such as battery charge amount SOC (State of automobile itself
Of Charge) automatically realize V2G operation.
Another aspect of the invention provides a kind of electric car charge and discharge control system including above-described based on V2G
The application method of system, includes the following steps:
S1: the stator side winding of motor is accessed power distribution network by electric car parking；
S2: entire car controller receives electric network information；
S3: entire car controller carries out judging whether to need charge or discharge according to the charge and discharge strategy of setting；
S4: charge or discharge finishes, and disconnects the connection of motor and power grid.
The realization of V2G technology be unable to do without reasonable charge and discharge control strategy.From the point of view of power grid, electric car can not
It is optionally linked into power grid, unreasonable charge and discharge control may result in undesirable peak load, to generate expensive throwing
The problems such as money.The electric car charge-discharge control system based on V2G that this patent proposes is intended according to power distribution network dispatch command and is worked as
Preceding SOC situation carries out charge and discharge control.
It is divided according to parking site, parking can be divided into two types: non-residential area parking and residential area parking.
(1) the parking demand time response of non-residential area
The parking demand of non-residential area is usually by the trips generation such as go to work, go to school, do shopping, and parking site many places are in industry
Or shopping centre.On weekdays, go to work, trip of going to school accounts for major part, car owner generally comes out early and return late: morning 8:00 or so reach work
Make place, afternoon, 17:00 or so came off duty, and the fraction dinner hour goes home or goes out.Therefore, such down time is longer,
Generally 4-8 hours, stopping duration due to overtime work etc. may be longer.
Somewhere working day, the statistic curve that parking demand per unit value changes over time are as shown in Figure 5.
It can be seen from the figure that commuting parking occurs mainly in daytime, exist in 7:00~10:00 and 14:00-17:00
Parking peak, in 11:00-12:00 there are a low ebb, leaving this is mainly due to part car owner noon causes.
(2) residential area parking demand time response
Residential area parking is primarily referred to as the parking behavior that user returns to residence, and general down time is longer, most of
At 10 hours or more.
Residential area parking per unit value changes with time as shown in Figure 6, it can be seen that its curve shape and trading estate
Curve it is just the opposite.Since most users are come out early and return late, general 18:00 or so reach residence, second day 7 points or so from
It opens.So parking peak occurred at night, daytime, parking demand was less.
As it can be seen that by rationally controlling, it is electric automobile power battery charging that night, which may be implemented, and daytime, electric car was to electricity
Net electric discharge, has the function that peak load shifting, has positive effect to the health operation of power distribution network.
The angle of ancillary service income is provided from reducing the charging expense of user, increasing, in effective parking interval
Electric car charging and discharging state and charge-discharge electric power are controlled.Automobile user is to participate in the main body of V2G, passes through charge and discharge
Electric control strategy can guarantee the maximization of user's income, so that more users is attracted to participate in V2G, it is electronic to pushing
The universal of automobile is of great significance.
Daily individual electric car V2G realizes case as shown in fig. 7, this patent is suitable for electric car charge and discharge control system
System, it is ensured that while automobile normal running, realize V2G, simplify system, increase V2G charge-discharge electric power processing capacity, according to reality
Situation realizes faster charge and discharge, from user perspective, in the case where meeting power distribution network demand and electric car SOC,
Electric car charging and discharging state and charge-discharge electric power are controlled in effective parking interval, increases user and is benefited.It is reached for matching
The effect of power grid peak load shifting guarantees that user benefit maximizes.
In the present embodiment, the charge and discharge strategy in step S2 includes the following steps:
S21: the battery charge amount of the power battery of current electric car is obtained；
S22: battery charge amount is compared with charge threshold: if battery charge amount is lower than charge threshold, power grid pair
Power battery charges.
S23: if battery charge amount is higher than charge threshold, judge whether power grid instruction charges: if so, power grid is to power
Battery charges；Otherwise judge whether power grid instruction discharges.
S24: if so, power battery discharges to power grid；Otherwise judge whether night.
S25: if so, power grid charges to power battery；Otherwise power battery discharges to power grid.
In the present embodiment, electric car is to be connected to power supply facilities by charge and discharge and measuring equipment.
A kind of electric car charge-discharge control system and application method based on V2G of the invention has below beneficial to effect
Fruit:
1. simplifying system, increase interior space utilization rate；
2. increasing V2G charge-discharge electric power processing capacity, faster charge and discharge can be realized according to the actual situation；
3. Optimal Control Strategy while meeting grid side demand and SOC situation, guarantees to use from user perspective
The maximization of family interests.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, various changes or modifications can be made to these embodiments, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (10)
1. a kind of electric car charge-discharge control system based on V2G, which is characterized in that including entire car controller, electric drive system,
Power battery and battery management system, in which:
The electric drive system includes DC/AC converter and motor；
The entire car controller unidirectionally receives external information, and respectively with the battery management system and the DC/AC converter
Two-way exchange information；
The battery management system includes power battery, and the power battery and the DC/AC converter are electrically connected；It is described
DC/AC converter and the electrical connection of motor, the motor and power grid are electrically connected；
When the motor and power grid disconnect, the DC/AC convertor controls motor speed, torque output, when the motor
When connecting with power grid, when the entire car controller integrates delivering charge and discharge instruction, the DC/AC converter is the power
Battery charging and discharging.
2. the electric car charge-discharge control system according to claim 1 based on V2G, which is characterized in that the motor
Switch is provided between the power grid.
3. the electric car charge-discharge control system according to claim 2 based on V2G, which is characterized in that the motor
Stator side winding accesses power grid by the switch.
4. the electric car charge-discharge control system according to claim 3 based on V2G, which is characterized in that the switch
It is three, the stator side winding carries out star-like connection by three switches respectively.
5. the electric car charge-discharge control system according to claim 1 based on V2G, which is characterized in that described whole
Vehicle controller controlled according to the carrying capacity of the dispatch command of power grid and battery the power battery power flow power grid or
Control power battery described in the power flow of the power grid.
6. a kind of electric car charge-discharge control system based on V2G as claimed in any one of claims 1-5
Application method, which comprises the steps of:
S1: the stator side winding of motor is accessed power distribution network by electric car parking；
S2: entire car controller receives electric network information；
S3: entire car controller carries out judging whether to need charge or discharge according to the charge and discharge strategy of setting；
S4: charge or discharge finishes, and disconnects the connection of motor and power grid.
7. application method according to claim 6, which is characterized in that the charge and discharge strategy in the step S2 includes as follows
Step:
S21: the battery charge amount of the power battery of current electric car is obtained；
S22: battery charge amount is compared with charge threshold: if battery charge amount is lower than charge threshold, power grid is to power
Battery charges.
S23: if battery charge amount is higher than charge threshold, judge whether power grid instruction charges: if so, power grid is to power battery
It charges；Otherwise judge whether power grid instruction discharges.
8. application method according to claim 7, which is characterized in that further include following steps:
S24: if so, power battery discharges to power grid；Otherwise judge whether night.
9. application method according to claim 8, which is characterized in that further include following steps:
S25: if so, power grid charges to power battery；Otherwise power battery discharges to power grid.
10. application method according to claim 6, which is characterized in that the electric car is by charge and discharge and meter
Amount equipment is connected to power supply facilities.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910482850.2A CN110171323A (en) | 2019-06-04 | 2019-06-04 | A kind of electric car charge-discharge control system and application method based on V2G |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910482850.2A CN110171323A (en) | 2019-06-04 | 2019-06-04 | A kind of electric car charge-discharge control system and application method based on V2G |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313476A (en) * | 2019-11-29 | 2020-06-19 | 国网智能科技股份有限公司 | V2G short-time emergency charging system and method |
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