CN202068223U - Vehicle-based charging-discharging device based on V2G technology - Google Patents

Vehicle-based charging-discharging device based on V2G technology Download PDF

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Publication number
CN202068223U
CN202068223U CN2011200515550U CN201120051555U CN202068223U CN 202068223 U CN202068223 U CN 202068223U CN 2011200515550 U CN2011200515550 U CN 2011200515550U CN 201120051555 U CN201120051555 U CN 201120051555U CN 202068223 U CN202068223 U CN 202068223U
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battery
side converter
grid
battery side
converter
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樊英
薛钟兵
韩学栋
程明
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Southeast University
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Southeast University
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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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

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

Abstract

The utility model relates to a vehicle-loaded charging-discharging device based on V2G technology, comprising a power supply input portion, a battery, an electrical network side controller, an electrical network side converter, a battery side controller, and a battery side converter, with the power supply input portion, the electrical network side converter, the battery side converter, and the battery being sequentially connected, wherein the battery side controller adopts the hysteresis loop comparison control mode. The hysteresis loop outputs the duty ratio controlling the battery side converter to realize constant current, constant voltage charging, and Boost chopper transformation amid network incorporation by comparing real-time detected voltage and current volume to the set value; and the electrical network side adopts double closed loop control mode of voltage outer ring and current inner ring to realize the charging adaptation and network incorporating inversion of the electrical network side converter. The vehicle-based charging-discharging device of the utility model, different from the conventional bidirectional variable current circuit structure which is complicated in structure, high in cost and low in efficiency, realizes the objective of operating two working modes via one circuit.

Description

A kind of vehicle-mounted charge and discharge device based on the V2G technology
Technical field
The utility model relates to a kind of electrical circuitry equipment technology of electric automobile, particularly can realize and electrical network between two-way interaction and a kind of vehicle-mounted charge and discharge device of exchange based on the V2G technology.
Background technology
Along with becoming increasingly conspicuous of energy problem and environmental pollution, replacing traditional internal-combustion engines vehicle with electric automobile becomes one of focus of current research.And the battery charging and discharging technology is the key technology of electric automobile development, but electrical network is only to charging batteries of electric automobile on the traditional sense, because therefore batteries of electric automobile capacity and to discharge and recharge power very big can only finish the charging task at special charging station, this brings very big inconvenience to charging.Simultaneously, for the electric automobile of parking for a long time, its not only in the battery energy stored do not obtain fine utilization and to a certain extent the life-span of battery impacted yet.Proposition and development along with intelligent grid, people are just trying to explore and are studying a kind of new model---V2G pattern, promptly allow the electric energy of electric automobile under slave mode, realize and electrical network between two-way interaction and exchange, also can improve charging convenience and economy and the operation of power networks efficient of electric automobile user on this basis to mobile unit.But at the interaction power supply that how to realize between electric automobile and the electrical network, the most circuit structure complexity of prior art, cost height, efficient are low, therefore, are necessary to propose a kind of cost-effective vehicle-mounted charge and discharge device to promote the development of V2G technology and intelligent grid technology.
Summary of the invention
The purpose of this utility model provides a kind of based on the V2G technical foundation, can allow the electric energy of electric automobile under slave mode, realize and electrical network between two-way interaction and the vehicle-mounted charge and discharge device of exchange, realizing the charging of electric automobile, and return during the electric weight residue and fill the telegram in reply net.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of vehicle-mounted charge and discharge device based on the V2G technology comprises that the power input part that connects power firestreak and zero line divides and battery, also comprise grid side controller and grid side converter, battery side controller and battery side converter, the grid side converter links to each other with the battery side converter, the opposite side of grid side converter connects the power input part branch, and the opposite side of battery side converter connects battery; Comprise that also input connects AC side voltage measurement module, ac-side current measurement module that power input part divides bus, input connects the dc voltage measurement module of bus between grid side converter and the battery side converter, and input connects battery side voltage measurement module, the battery side current measurement module of battery; AC side voltage measurement module, ac-side current measurement module are sent output valve into the grid side controller, and grid side controller output associated control signal control grid side converter is finished adaptive or inversion; Dc voltage measurement module, battery side voltage measurement module, battery side current measurement module are sent output valve into the battery side controller, and battery side controller output associated control signal control battery side converter is finished boost chopper or buck chopper.
As a kind of improvement of the present utility model, described grid side converter comprises insulated gate bipolar transistor V1, V2, V3, V4, the emitter of V1 links to each other with the collector electrode of V2 and is connected the live wire that power input part divides by filter inductance Lg, and the emitter of V3 links to each other with the collector electrode of V4 and is connected the zero line that power input part divides; Filter capacitor Cg is connected between the live wire and zero line of power input part branch.
As a kind of improvement of the present utility model, described battery side converter comprises insulated gate bipolar transistor V5, V6, and the emitter of V5 and the collector electrode of V6 link to each other and be connected the positive pole of battery, the negative pole of the emitter connection battery of V6 by flat ripple inductance L b; Filter capacitor Cb is attempted by between the battery positive and negative polarities; The collector electrode of V1 and V3 links to each other and is connected the collector electrode of V5 in the battery side converter in the grid side converter; The emitter of V2 and V4 links to each other and is connected the emitter of V6 in the battery side converter in the grid side converter; Between grid side converter and the battery side converter on above-mentioned two nodes and be connected to filter capacitor C1.
As a kind of improvement of the present utility model, the grid side controller comprises the set-point importation, the output valve of dc voltage detection module and set-point are sent into pi regulator after relatively, the output valve of pi regulator and phase-locked after AC side voltage detection module output valve multiply each other, send into the PR adjuster with ac-side current detection module output valve after relatively again, send into the pwm signal generator after the value of feedback addition of the output valve of PR adjuster and the output of AC side voltage detection module, the output of pwm signal generator connects the grid of V1, V2, V3, V4 in the grid side converter.
As a kind of improvement of the present utility model, the battery side controller is a hysteresis comparator, its output connects the grid of V5, V6 in the battery side converter, and input connects the output of battery side voltage detection module, battery side current detection module and dc voltage detection module.
As a kind of improvement of the present utility model; a kind of vehicle-mounted charge and discharge device based on the V2G technology also comprises discharge protection circuit; discharge protection circuit is connected to the two ends of filter capacitor C1; and between filter capacitor C1 and grid side converter; discharge protection circuit can limit DC bus-bar voltage pump liter, is used for the discharge of bus capacitor overvoltage discharge or circuit failure protection.
As a kind of improvement of the present utility model, a kind of vehicle-mounted charge and discharge device based on the V2G technology also comprises the battery failures circuit breaker, and the one end connects the both positive and negative polarity of battery respectively, the other end is attempted by filter capacitor Cb two ends, and the battery side stoppage circuit breaker is used to eliminate the danger of battery short circuit.
As a kind of improvement of the present utility model; a kind of vehicle-mounted charge and discharge device based on the V2G technology; its described discharge protection circuit comprises resistance R and power switch V7; one end of resistance R connects the emitter of power switch V7, and the emitter of the other end and power switch V7 is connected to the two ends of filter capacitor C1.
A kind of vehicle-mounted charge and discharge device based on the V2G technology of the present utility model is when using, and in the set-point input module of described grid side controller, set-point is desired busbar voltage when charging is adaptive; Set-point is desired grid-connected current value when parallel network reverse.
The beneficial effects of the utility model are: in charging process, the grid side controller adopts the double circle controling mode of outer voltage, current inner loop, the switch motion of power tube V1, V2, V3, V4 makes the grid side converter be operated in adaptation state in the control grid side converter, and power tube V5, V6 switch motion that the battery side controller adopts the chain rate that stagnates to control in the battery side converter than mode make the battery side converter be operated in the buck chopper state; In the feedback discharge process that is incorporated into the power networks, outer voltage in the grid side controller does not act on, the current inner loop effect is operated in inverter mode in conjunction with the switch motion of power tube V1, V2, V3, V4 in PR adjuster and the pwm signal generator control grid side converter, and battery side controller control battery side converter is operated in the boost chopper state.The utility model has saved transformer, realizes that the circuit of the two-way unsteady flow of V2G is shared, simplifies the structure, reduced cost, has improved efficient; Adopt the PWM rectification in the structure, can improve input power factor, improved electric energy transmitting efficient, reduced current harmonics and idle pollution; Replace traditional PI controller with the PR controller in the grid side controller, the zero steady-state error of of ac is eliminated better effects if, strengthened the command signal follow-up control; The utility model has also increased discharge protection circuit and battery failures circuit breaker simultaneously, has improved the fail safe and the reliability of device.
Description of drawings
Figure 1 shows that structure flow chart of the present utility model;
Figure 2 shows that apparatus structure schematic diagram of the present utility model;
Figure 3 shows that the control signal oscillogram of battery side controller among the present invention;
Figure 4 shows that the control signal oscillogram of grid side controller among the present invention.
Embodiment
For content of the present utility model is become apparent more, be described further below in conjunction with the drawings and specific embodiments.
In conjunction with the structure flow chart that Figure 1 shows that a kind of preferred embodiment of the present utility model, a kind of vehicle-mounted charge and discharge device based on the V2G technology comprises the electrical network that power input part divides, battery, grid side controller and grid side converter, battery side controller and battery side converter, and input connects the AC side voltage measurement module that power input part divides bus, the ac-side current measurement module, input connects the dc voltage measurement module of bus between grid side converter and the battery side converter, input connects the battery side voltage measurement module of battery, the battery side current measurement module, the grid side converter links to each other with the battery side converter, the opposite side of grid side converter connects the power input part branch, and the opposite side of battery side converter connects battery; AC side voltage measurement module, ac-side current measurement module are sent output valve into the grid side controller, and grid side controller output associated control signal control grid side converter is finished adaptive or inversion; Dc voltage measurement module, battery side voltage measurement module, battery side current measurement module are sent output valve into the battery side controller, and battery side controller output associated control signal control battery side converter is finished boost chopper or buck chopper.
In conjunction with shown in Figure 2, the power input part branch is included in attaching plug 1, fuse 2 and the Closing Switch 3 that connects successively on the power source bus; Grid side converter 4 comprises power switch V1, V2, V3, V4, the emitter of V1 links to each other with the collector electrode of V2 and is connected the live wire that power input part divides by filter inductance Lg, the emitter of V3 links to each other with the collector electrode of V4 and is connected the zero line that power input part divides, and filter capacitor Cg is connected between the live wire and zero line of power input part branch;
Battery side conversion 6 comprises power switch V5, V6, and the emitter of V5 and the collector electrode of V6 link to each other and be connected the positive pole of battery, the negative pole of the emitter connection battery of V6 by flat ripple inductance L b; Filter capacitor Cb is attempted by between the battery positive and negative polarities;
The collector electrode of V1 and V3 links to each other and is connected the collector electrode of V5 in the battery side converter 6 in the grid side converter 4; The emitter of V2 and V4 links to each other and is connected the emitter of V6 in the battery side converter 6 in the grid side converter 4; Between grid side converter 4 and the battery side converter 6 on above-mentioned two nodes and be connected to filter capacitor C1; Discharge protection circuit 5 is connected to the two ends of filter capacitor C1, and between filter capacitor C1 and grid side converter, it comprises resistance R and power switch V7, one end of resistance R connects the collector electrode of power switch V7, and the other end and the emitter of power switch V7 are connected the two ends of filter capacitor C1 respectively; Battery failures circuit breaker 7 is connected on filter capacitor C bAnd between the battery;
Grid side controller 10 comprises the set-point importation, the output valve of dc voltage detection module 13 and set-point are sent into pi regulator after relatively, the output valve of pi regulator multiply by the phase-locked result of AC side voltage detection module 11 output valves, send into the PR adjuster with ac-side current detection module 12 output valves after relatively again, send into the pwm signal generator after the value of feedback addition of the output valve of PR adjuster and 11 outputs of AC side voltage detection module, the output of pwm signal generator connects the grid of V1, V2, V3, V4 in the grid side converter 4; In the set-point input module of grid side controller, set-point is desired busbar voltage when charging is adaptive, and its value should be greater than line voltage peak value 311V, and this is because PWM rectification and inversion all require dc voltage greater than AC side; Set-point is desired grid-connected current value when parallel network reverse, and this is by electricity market and batteries of electric automobile SOC decision.
The battery side controller is a hysteresis comparator, and its output connects the grid of V5, V6 in the battery side converter, and input connects the output of battery side voltage detection module, battery side current detection module and dc voltage detection module.
Discharge protection circuit can limit DC bus-bar voltage pump liter, is used for the discharge of bus capacitor overvoltage discharge or circuit failure protection; The battery side stoppage circuit breaker is used to eliminate the danger of battery short circuit.
The control method and the principle of a kind of vehicle-mounted charge and discharge device based on the V2G technology of the present utility model are, battery side controller 9 adopts the chain rate that stagnates than control mode, by the voltage and current amount that will detect in real time and set-point the stagnate duty ratio ug of ring output control battery side converter 6 of back relatively, the control signal corresponding waveform as shown in Figure 3, the break-make of control switch pipe V5, V6, thereby Buck buck chopper when realizing constant current, constant voltage charge and the Boost boost chopper conversion when being incorporated into the power networks feedback.
Grid side controller 10 adopts the double circle controling mode of outer voltage, current inner loop, and the voltage feed-forward control on the AC side bus is used to suppress the influence that voltage ripple of power network brings.When being operated in charged state, the set-point of grid side controller is desired bus voltage value, this moment voltage, electric current loop all works, the DC bus-bar voltage that detects and set-point are sent into pi regulator after relatively, it is output as a direct current current command signal, multiply by again by phase-locked electric network voltage phase that obtains and frequency signal, obtain exchanging instruction current, obtain error current after introducing input current negative feedback relatively, obtain converter 4 input terminal voltage set-points through ratio resonance adjuster (PR) back with the addition of voltage feed-forward control value, be input to the pwm signal generator again, thereby produce 4 work of pwm signal control change device; When being operated in and during net state, be given as desired grid-connected current value, this moment, outer voltage did not act on, has only the current inner loop effect, given grid-connected current amplitude and electrical network phase place and frequency signal are multiplied each other the back as instruction current, relatively pass through the PR controller in the back with the grid-connected current detected value, be input to the PWM generator after adding ac output voltage compensation positive feedback, generate pwm signal, the corresponding control signal waveform as shown in Figure 4, wherein Ug1, Ug2, Ug3, Ug4 control the break-make of V1, V2, V3, V4, thereby realize adaptive or inversion.
Current closed-loop has adopted the PR controller in the grid side controller 10, for exchanging controlled quentity controlled variable, it eliminates zero steady-state error better effects if than PI controller, thereby strengthened the command signal follow-up control, for low-order harmonic good restraining ability is arranged in addition, can select to produce resonance to compensate this subharmonic at a certain low-order harmonic.Its structure expression is as follows:
( 1 ) G c ( s ) = K p + K i · 2 ω c s s 2 + 2 ω c s + ω 0 2 + Σ b = 3,5,7 K ih 2 ω c s s 2 + 2 ω c s + ( h ω 0 ) 2
Wherein, K pThe dynamic property of decision systems, K iAdjust the phase shift between output and the reference signal, ω cBe shearing frequency, ω 0Be resonance frequency, be mapped as the electrical network work frequency in this control system, h is a harmonic number, K IhIt is the integral coefficient of the compensation harmonic of wanting.
The utility model is when using: attaching plug 1 is inserted single phase poaer supply, and Closing Switch 3 and battery side stoppage circuit breaker 7, when electric automobile need charge, electric energy passed through capacitor C earlier gFiltering is after by filter inductance L g, the PWM rectification circuit output formed of grid side converter 4 and filter capacitor C1 obtains DC bus-bar voltage, again via battery side converter 6, flat ripple inductance L bWith filter capacitor C bThe Buck chopper circuit of forming obtains required voltage or electric current gives battery 8 chargings; When electric automobile need feed back to electrical network with unnecessary electric energy, electric energy passed through capacitor C bFiltering is after by flat ripple inductance L b, the Boost chopper circuit formed of battery side converter 6 and capacitor C 1 boosts, after connect by grid side converter 4, filter inductance L gWith filter capacitor C gThe PWM inverter circuit output industrial-frequency alternating current of forming is to electrical network.
Discharge protection circuit 5 only is operated in the situation that dc bus overvoltage or error protection need be discharged, and this moment, power switch V7 was open-minded, and electric current discharges by resistance R; And V7 is in normally open when the circuit operate as normal.Battery side stoppage circuit breaker 7 is normal switch when battery 8 fault-free, can automatic shutdown circuit when detecting the battery short circuit situation.
Concrete case study on implementation only is a preferable case study on implementation of the present utility model described in the utility model, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be as technology category of the present utility model.

Claims (8)

1. vehicle-mounted charge and discharge device based on the V2G technology, comprise that the power input part that connects power firestreak and zero line divides and battery, it is characterized in that, also comprise grid side controller and grid side converter, battery side controller and battery side converter, the grid side converter links to each other with the battery side converter, and the opposite side of grid side converter connects the power input part branch, and the opposite side of battery side converter connects battery; Comprise that also input connects AC side voltage measurement module, ac-side current measurement module that power input part divides bus, input connects the dc voltage measurement module of bus between grid side converter and the battery side converter, and input connects battery side voltage measurement module, the battery side current measurement module of battery; AC side voltage measurement module, ac-side current measurement module are sent output valve into the grid side controller, and grid side controller output associated control signal control grid side converter is finished adaptive or inversion; Dc voltage measurement module, battery side voltage measurement module, battery side current measurement module are sent output valve into the battery side controller, and battery side controller output associated control signal control battery side converter is finished boost chopper or buck chopper.
2. the vehicle-mounted charge and discharge device based on the V2G technology according to claim 1, it is characterized in that, described grid side converter comprises insulated gate bipolar transistor V1, V2, V3, V4, the emitter of V1 links to each other with the collector electrode of V2 and is connected the live wire that power input part divides by filter inductance Lg, and the emitter of V3 links to each other with the collector electrode of V4 and is connected the zero line that power input part divides; Filter capacitor Cg is connected between the live wire and zero line of power input part branch.
3. the vehicle-mounted charge and discharge device based on the V2G technology according to claim 2, it is characterized in that, described battery side converter comprises insulated gate bipolar transistor V5, V6, the emitter of V5 and the collector electrode of V6 link to each other and are connected the positive pole of battery, the negative pole of the emitter connection battery of V6 by flat ripple inductance L b; Filter capacitor Cb is attempted by between the battery positive and negative polarities; The collector electrode of V1 and V3 links to each other and is connected the collector electrode of V5 in the battery side converter in the grid side converter; The emitter of V2 and V4 links to each other and is connected the emitter of V6 in the battery side converter in the grid side converter; Between grid side converter and the battery side converter on above-mentioned two nodes and be connected to filter capacitor C1.
4. the vehicle-mounted charge and discharge device based on the V2G technology according to claim 1 and 2, it is characterized in that, the grid side controller comprises the set-point importation, the output valve of dc voltage detection module and set-point are sent into pi regulator after relatively, the output valve of pi regulator and phase-locked after AC side voltage detection module output valve multiply each other, send into the PR adjuster with ac-side current detection module output valve after relatively again, send into the pwm signal generator after the value of feedback addition of the output valve of PR adjuster and the output of AC side voltage detection module, the output of pwm signal generator connects V1 in the grid side converter, V2, V3, the grid of V4.
5. the vehicle-mounted charge and discharge device based on the V2G technology according to claim 3, it is characterized in that, the battery side controller is a hysteresis comparator, its output connects the grid of V5, V6 in the battery side converter, and input connects the output of battery side voltage detection module, battery side current detection module and dc voltage detection module.
6. the vehicle-mounted charge and discharge device based on the V2G technology according to claim 1 and 2 is characterized in that, comprises that also discharge protection circuit, discharge protection circuit are connected to the two ends of filter capacitor C1, and between filter capacitor C1 and grid side converter.
7. the vehicle-mounted charge and discharge device based on the V2G technology according to claim 1 and 2 is characterized in that also comprise the battery failures circuit breaker, it is connected on the bus, and is connected filter capacitor C bAnd between the battery.
8. the vehicle-mounted charge and discharge device based on the V2G technology according to claim 6; it is characterized in that; discharge protection circuit comprises resistance R and insulated gate bipolar transistor V7; one end of resistance R connects the collector electrode of power switch V7, and the other end and the emitter of V7 are connected the two ends of filter capacitor C1 respectively.
CN2011200515550U 2011-03-01 2011-03-01 Vehicle-based charging-discharging device based on V2G technology Expired - Fee Related CN202068223U (en)

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CN2011200515550U CN202068223U (en) 2011-03-01 2011-03-01 Vehicle-based charging-discharging device based on V2G technology

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