CN105811444B - A kind of electric vehicle and power grid interactive simulation load system and its electrical protection method - Google Patents
A kind of electric vehicle and power grid interactive simulation load system and its electrical protection method Download PDFInfo
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- CN105811444B CN105811444B CN201610266745.1A CN201610266745A CN105811444B CN 105811444 B CN105811444 B CN 105811444B CN 201610266745 A CN201610266745 A CN 201610266745A CN 105811444 B CN105811444 B CN 105811444B
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- monitor terminal
- protection module
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- 230000002452 interceptive effect Effects 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004088 simulation Methods 0.000 title claims abstract description 10
- 241000876446 Lanthanotidae Species 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000000819 phase cycle Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims 1
- 238000004146 energy storage Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Classifications
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of electric vehicles and power grid interactive simulation load system, including battery system, two-way AC/DC modules, cutting-in control protection module and monitor terminal；Battery system includes battery and the battery management system that is connect with battery; monitor terminal is connect with battery management system, two-way AC/DC modules and cutting-in control protection module respectively; battery management system is also connect with two-way AC/DC modules; two-way AC/DC modules are connect by breaker with power grid; two-way AC/DC modules are also connect with cutting-in control protection module, and cutting-in control protection module is connect by breaker with power grid.The electrical protection method of the system is also disclosed that simultaneously.The present invention solves the problems, such as the electrical safety problems of equipment itself in the fictitious load course of work and grid connection security when accessing power grid, improves the safety of equipment itself.
Description
Technical field
The present invention relates to a kind of electric vehicles and power grid interactive simulation load system and its electrical protection method, belong to electronic
Automobile and power grid interaction field.
Background technology
V2G (Vehicle to Grid) theory be exactly the two-way flow of energy between electric automobile charging station and power grid i.e.
Electric vehicle realizes the two-way exchange of energy and information between power grid as mobile energy-storage travelling wave tube under slave mode.V2G skills
PFC, energy in bidirectional flow may be implemented in art, this can not only filter out harmonic pollution, can also improve the steady of power grid
Qualitative and reliability.The development of electric vehicle makes battery energy storage mode obtain quick development.Currently based on the charge and discharge of V2G
The problems such as that there is also security reliabilities is low for facility, has a single function, higher price.
Invention content
In order to solve the above technical problem, the present invention provides a kind of electric vehicle and power grid interactive simulation load system and
Its electrical protection method.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of electric vehicle and power grid interactive simulation load system, including battery system, two-way AC/DC modules and network control
Protection module processed and monitor terminal；The battery system includes battery and the battery management system that is connect with battery, the prison
Control terminal is connect with battery management system, two-way AC/DC modules and cutting-in control protection module respectively, the battery management system
It is also connect with two-way AC/DC modules, the two-way AC/DC modules are connect by breaker with power grid, the two-way AC/DC modules
It is also connect with cutting-in control protection module, the cutting-in control protection module is connect by breaker with power grid.
A kind of electrical protection method of electric vehicle and the electrical protection method of power grid interactive simulation load system, including with
Lower step,
Step 1, battery management system measures charging total current and SOC situations, and measured value is sent to monitoring
Terminal；
Step 2, monitor terminal judges to charge total current whether more than preset overcurrent protection threshold value, if so, being determined as
Internal fault, monitor terminal send out trip signal to grid-connected protection module, cut off breaker, exit flow；Otherwise step is gone to
3；
Step 3, monitor terminal judge SOC situations whether be more than preset SOC operation intervals, if so, monitor terminal to
Grid-connected protection module sends out trip signal, cuts off breaker, exits flow；Otherwise step 4 is gone to；
Step 4, two-way AC/DC modules measure the three-phase voltage of input, and measured value is sent to monitor terminal；
Step 5, monitor terminal measures the size of single-phase power, judges whether three-phase voltage is distorted, if it is, turning
To step 6, outer protection is otherwise carried out, i.e. monitor terminal sends out trip signal to grid-connected protection module, cuts off breaker, concurrently
Go out isolated island signal, exits flow；
Step 6, judge whether to use overcurrent protection of composite voltage start, if it is, going to step 7, otherwise exit
Flow；
Step 7, judge whether current break or negative phase-sequence earth-current occur, if so, cutting-in control protection module voltage
Transformer disconnection exits flow；Otherwise step 8 is gone to；
Step 8, judge whether to occur active power to reduce or transfinite, if so, monitor terminal is to grid-connected protection module
Trip signal is sent out, cuts off breaker, and send out isolated island signal.
Trip signal delay is sent out after several seconds.
The advantageous effect that the present invention is reached：The present invention solves the electrical peace of equipment itself in the fictitious load course of work
Grid connection security problem when full problem and access power grid, improves the safety of equipment itself, meanwhile, to the prison of battery SOC state
Control is conducive to improve the service life of battery, is conducive to the popularization and application of energy-storage system during V2G.
Description of the drawings
Fig. 1 is V2G analog loading system block diagrams.
Fig. 2 is the flow chart of electrical protection method.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, a kind of electric vehicle and power grid interactive simulation load system, including battery system（PACK）, it is two-way
AC/DC modules, cutting-in control protection module and monitor terminal；Wherein, battery system includes battery and the electricity that is connect with battery
Pond manages system（BMS）, cutting-in control protection module be mainly responsible for overcurrent protection, overvoltage protection and isolated island protection.
Each component connection relation is as follows：
Monitor terminal is connect with battery management system, two-way AC/DC modules and cutting-in control protection module respectively, cell tube
Reason system is also connect with two-way AC/DC modules, and two-way AC/DC modules are connect by breaker with power grid, and two-way AC/DC modules are also
It is connect with cutting-in control protection module, cutting-in control protection module is connect by breaker with power grid.
The electrical protection method of above system, specifically as shown in Fig. 2, including the following steps：
Step 1, battery management system measures charging total current and SOC situations, and measured value is sent to monitoring
Terminal.
Step 2, monitor terminal judges to charge total current whether more than preset overcurrent protection threshold value, if so, being determined as
Internal fault, monitor terminal send out trip signal to grid-connected protection module, cut off breaker, exit flow；Otherwise step is gone to
3。
Step 3, monitor terminal judge SOC situations whether be more than preset SOC operation intervals, if so, monitor terminal to
Grid-connected protection module sends out trip signal, cuts off breaker, exits flow；Otherwise step 4 is gone to.
Step 4, two-way AC/DC modules measure the three-phase voltage of input, and measured value is sent to monitor terminal.
Step 5, monitor terminal measures the size of single-phase power, judges whether three-phase voltage is distorted, if it is, turning
To step 6, outer protection is otherwise carried out, i.e. monitor terminal sends out trip signal to grid-connected protection module, cuts off breaker, concurrently
Go out isolated island signal, exits flow.
Step 6, judge whether to use overcurrent protection of composite voltage start, if it is, going to step 7, otherwise exit
Flow.
Step 7, judge whether current break or negative phase-sequence earth-current occur, if so, cutting-in control protection module voltage
Transformer disconnection exits flow；Otherwise step 8 is gone to.
Step 8, judge whether to occur active power to reduce or transfinite, if so, monitor terminal is to grid-connected protection module
Trip signal is sent out, cuts off breaker, and send out isolated island signal.
During above-mentioned electic protection, trip signal delay is sent out after several seconds, avoids protection misoperation, is occurred inside and outside
Alarm can be sent out when portion's failure.
It is when the present invention solves electrical safety problems of equipment itself in the fictitious load course of work and access power grid and
Net safety problem improves the safety of equipment itself, meanwhile, be conducive to improve the service life of battery to the monitoring of battery SOC state,
Be conducive to the popularization and application of energy-storage system during V2G.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (2)
1. the electrical protection method of a kind of electric vehicle and power grid interactive simulation load system, the electric vehicle is interactive with power grid
Analog loading system includes battery system, two-way AC/DC modules, cutting-in control protection module and monitor terminal；The battery system
System includes battery and the battery management system that is connect with battery, the monitor terminal respectively with battery management system, two-way AC/
DC modules are connected with cutting-in control protection module, and the battery management system is also connect with two-way AC/DC modules, described two-way
AC/DC modules are connect by breaker with power grid, and the two-way AC/DC modules are also connect with cutting-in control protection module, described
Cutting-in control protection module is connect by breaker with power grid；It is characterized in that：Include the following steps,
Step 1, battery management system measures charging total current and SOC situations, and measured value is sent to monitor terminal；
Step 2, monitor terminal judges to charge total current whether more than preset overcurrent protection threshold value, if so, being determined as inside
Failure, monitor terminal send out trip signal to grid-connected protection module, cut off breaker, exit flow；Otherwise step 3 is gone to；
Step 3, monitor terminal judges whether SOC situations are more than preset SOC operation intervals, if so, monitor terminal is to grid-connected
Protection module sends out trip signal, cuts off breaker, exits flow；Otherwise step 4 is gone to；
Step 4, two-way AC/DC modules measure the three-phase voltage of input, and measured value is sent to monitor terminal；
Step 5, monitor terminal measures the size of single-phase power, judges whether three-phase voltage is distorted, if it is, going to step
Rapid 6, outer protection is otherwise carried out, i.e. monitor terminal sends out trip signal to grid-connected protection module, cuts off breaker, and send out orphan
Island signal, exits flow；
Step 6, judge whether to use overcurrent protection of composite voltage start, if it is, going to step 7, otherwise exit flow；
Step 7, judge whether current break or negative phase-sequence earth-current occur, if so, cutting-in control protection module mutual induction of voltage
Device breaks, and exits flow；Otherwise step 8 is gone to；
Step 8, judge whether that active power occur reduces or transfinite, if so, monitor terminal is sent out to grid-connected protection module
Trip signal cuts off breaker, and sends out isolated island signal.
2. the electrical protection method of a kind of electric vehicle according to claim 1 and power grid interactive simulation load system,
It is characterized in that：Trip signal delay is sent out after several seconds.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266745.1A CN105811444B (en) | 2016-04-26 | 2016-04-26 | A kind of electric vehicle and power grid interactive simulation load system and its electrical protection method |
| PCT/CN2016/108794 WO2017185756A1 (en) | 2016-04-26 | 2016-12-07 | Electric automobile and power grid interactive simulation load system and electrical protection method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266745.1A CN105811444B (en) | 2016-04-26 | 2016-04-26 | A kind of electric vehicle and power grid interactive simulation load system and its electrical protection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105811444A CN105811444A (en) | 2016-07-27 |
| CN105811444B true CN105811444B (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610266745.1A Active CN105811444B (en) | 2016-04-26 | 2016-04-26 | A kind of electric vehicle and power grid interactive simulation load system and its electrical protection method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105811444B (en) |
| WO (1) | WO2017185756A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811444B (en) * | 2016-04-26 | 2018-08-14 | 海南电网有限责任公司 | A kind of electric vehicle and power grid interactive simulation load system and its electrical protection method |
| CN108054785A (en) * | 2018-01-27 | 2018-05-18 | 丘健兴 | A kind of circuit for preventing wind power plant island-grid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104249629A (en) * | 2013-06-28 | 2014-12-31 | 比亚迪股份有限公司 | Electric vehicle, power system of the same, and charging method of said power system |
| CN204179732U (en) * | 2014-11-13 | 2015-02-25 | 温州大学 | Based on the multifunctional vehicle mounted charge and discharge electrical equipment of V2G |
| CN105068008A (en) * | 2015-07-14 | 2015-11-18 | 南京航空航天大学 | Battery SOC (state of charge) estimation method by utilizing vehicle-mounted charging machine identification battery parameter |
| KR20160025166A (en) * | 2014-08-27 | 2016-03-08 | 임기돈 | The Method Of Applying Vehicle-To-Grid Technology For Operating Vehicle |
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| JP2002252928A (en) * | 2001-02-26 | 2002-09-06 | Miki Denki Kk | Distributed power supply system, and control/protection device for the same |
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| CN101931238A (en) * | 2010-04-29 | 2010-12-29 | 浙江省电力试验研究院 | Master-slave strategy-based microgrid system coordination control method |
| CN102280903B (en) * | 2010-06-10 | 2014-07-30 | 上海市电力公司 | V2G intelligent charging and discharging system |
| CN202455130U (en) * | 2011-12-31 | 2012-09-26 | 比亚迪股份有限公司 | Charging/discharging control system of electric vehicle and electric vehicle |
| CN104767220B (en) * | 2015-04-14 | 2017-07-11 | 扬州大学 | The pattern that is incorporated into the power networks and the feed forward control method of independent operation mode switching |
| CN105811444B (en) * | 2016-04-26 | 2018-08-14 | 海南电网有限责任公司 | A kind of electric vehicle and power grid interactive simulation load system and its electrical protection method |
-
2016
- 2016-04-26 CN CN201610266745.1A patent/CN105811444B/en active Active
- 2016-12-07 WO PCT/CN2016/108794 patent/WO2017185756A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104249629A (en) * | 2013-06-28 | 2014-12-31 | 比亚迪股份有限公司 | Electric vehicle, power system of the same, and charging method of said power system |
| KR20160025166A (en) * | 2014-08-27 | 2016-03-08 | 임기돈 | The Method Of Applying Vehicle-To-Grid Technology For Operating Vehicle |
| CN204179732U (en) * | 2014-11-13 | 2015-02-25 | 温州大学 | Based on the multifunctional vehicle mounted charge and discharge electrical equipment of V2G |
| CN105068008A (en) * | 2015-07-14 | 2015-11-18 | 南京航空航天大学 | Battery SOC (state of charge) estimation method by utilizing vehicle-mounted charging machine identification battery parameter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105811444A (en) | 2016-07-27 |
| WO2017185756A1 (en) | 2017-11-02 |
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