CN104333103A - Electric automobile charging and discharging device based on V2G technology - Google Patents
Electric automobile charging and discharging device based on V2G technology Download PDFInfo
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- CN104333103A CN104333103A CN201410693005.7A CN201410693005A CN104333103A CN 104333103 A CN104333103 A CN 104333103A CN 201410693005 A CN201410693005 A CN 201410693005A CN 104333103 A CN104333103 A CN 104333103A
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Abstract
The invention discloses an electric automobile charging and discharging device based on a V2G technology. The electric automobile charging and discharging device is characterized by comprising an alternating current signal sampling and conditioning system, a direct current voltage sampling and conditioning system, a DSP control system, a driving system and a major loop system; the charging and discharging method of the device includes: real-time monitoring, signal collection, AD conversion, PWM outputting, drive controlling, and achieving bidirectional flowing; the electric automobile charging and discharging device based on the V2G technology has the advantages that: the hardware device is simple in design; the V2 technology is adopted, so that electric energy of an electric automobile and a power grid can be converted to each other; the power factor of the grid side when in charging can be 1, and the power factor of the grid side when in discharging can be -1;the system is high in reliability.
Description
(1) technical field:
The invention belongs to electric automobile electrical circuitry equipment field, particularly can realize a kind of electric automobile charge and discharge device based on V2G technology of two-way interaction between electrical network and exchange.
(2) background technology:
Along with becoming increasingly conspicuous of energy problem and environmental pollution, one of traditional internal-combustion engines vehicle focus becoming current research is replaced with electric automobile, and battery charging and discharging technology is the key technology of Development of Electric Vehicles, but electrical network is only to charging batteries of electric automobile in traditional sense, because batteries of electric automobile capacity and charge-discharge electric power are very large, therefore can only complete charging tasks at special charging station, this brings very large inconvenience to charging; Meanwhile, for the electric automobile parked for a long time, its energy not only stored in battery is not utilized to impact the life-span of battery to a certain extent very well yet.Along with proposition and the development of intelligent grid, people are just trying to explore and are studying a kind of new model, V2G (Vehicle to Grid) pattern, namely allow the electric energy of electric automobile under slave mode, realize two-way interaction between electrical network and exchange, also electric automobile user can be improved on this basis to the charging convenience of mobile unit and economy and operation of power networks efficiency, but power for the interaction how realized between electric automobile and electrical network, the most circuit structure of prior art is complicated, cost is high, efficiency is low, therefore, be necessary to propose a kind of cost-effective charge and discharge device to promote the development of V2G technology and intelligent power grid technology.
(3) summary of the invention:
The object of the invention is to devise a kind of electric automobile charge and discharge device based on V2G technology, it can overcome the deficiencies in the prior art, be a kind of adopt V2G technology, can allow the electric energy of electric automobile under slave mode, realize two-way interaction between electrical network and exchange; The electric automobile charge and discharge device that structure is simple, easy to operate.
Technical scheme of the present invention: a kind of electric automobile charge and discharge device based on V2G technology, it is characterized in that it by AC signal sample conditioning system, direct voltage sample conditioning system, DSP control system, drive system and primary heat transport system form; Wherein, described primary heat transport system is that two-phase is connected with external electrical network and energy-storage system of accumulator respectively; And the input of described primary heat transport system receives the drive singal of drive system, its output connects the input of direct voltage sampling conditioning system; The input of described AC signal sampling conditioning system gathers power network signal, and its output connects the input of DSP control system; The sample output of conditioning system of input and the direct voltage of described DSP control system is connected, and its output connects the input of drive system.
Described AC signal sampling conditioning system is made up of alternating current sampling conditioning unit and alternating voltage sampling conditioning unit; Wherein, described alternating current sampling conditioning unit is made up of Hall current instrument transformer and current regulating circuit; Described Hall current instrument transformer and current regulating circuit are unidirectional connection; Described current regulating circuit is made up of operational amplifier, low pass filter and variation convergent-divergent circuit; Described operational amplifier, low pass filter and variation convergent-divergent circuit are according to this in unidirectional connection; Described alternating voltage sampling conditioning unit is made up of Hall voltage instrument transformer and voltage modulate circuit; Described Hall voltage instrument transformer and voltage modulate circuit are unidirectional connection; Described voltage modulate circuit is made up of differential amplifier, filter and pressure limiting clamp circuit, and according to this in unidirectional connection; The described alternating current sampling output of conditioning unit is connected with the input of DSP control system respectively with the output of voltage sample conditioning unit.
Described DSP control system is made up of A/D modular converter, control algolithm module and PWM output module; Wherein, the input of described A/D modular converter receives the output of AC signal sampling conditioning system, and its output is connected with the input of control algolithm module; The output of described control algolithm module connects the input of PWM output module; The described output of PWM output module is connected with the input of drive system.
Described primary heat transport system is made up of PWM rectifier and DC/DC converter; Described PWM rectifier through DC side electric capacity of voltage regulation and DC/DC converter in being bi-directionally connected; Described DC/DC converter and storage battery are bi-directionally connected; The power electronic device that described PWM rectifier and DC/DC converter use is insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor); The emitter E of described IGBT, collector electrode C and grid G are by drive systems.
Described drive system is made up of pull down resistor, the M579 driving chip that can be used for IGBT driving, two triodes and voltage stabilizing didoe; Wherein, described pull down resistor is as input resistance, and one termination receives the output signal of DSP control system; The other end is connected with the input of M579 family chip; The output of described M579 family chip connects the base stage of two triodes respectively; The series connection point of another terminal output signal of described M579 chip, two triodes draws the input signal of output signal respectively as collector electrode C, grid G and the emitter E in primary heat transport system of signal and voltage stabilizing didoe.
Based on a charging/discharging thereof for the electric automobile charge and discharge device of V2G technology, it is characterized in that it comprises the following steps:
(1) AC signal sampling conditioning system is connected with external power grid, and real-time detection and conditioning net survey voltage, current signal; Direct voltage sampling conditioning system is connected with the PWM rectifier DC side electric capacity of voltage regulation in primary heat transport system, the magnitude of voltage of real-time detection electric capacity of voltage regulation;
(2) AC signal sampling conditioning system is connected with DSP control system respectively with direct voltage sampling conditioning system, by the analog signal of sampling in the A/D module receiving step (1) of DSP control system inside, then convert it into the discernible digital signal of control algolithm module of DSP control system;
(3) the control algolithm module of DSP control system obtain according to step (2) voltage, current signal value, by PWM output module produce pwm signal; Control algolithm module mainly comprises the control algolithm of PWM rectifier and the control algolithm of DC/DC converter; The control algolithm of PWM rectifier adopts Double closed-loop of voltage and current, and control objectives ensures that DC side voltage of voltage regulation is constant; The control of DC/DC converter adopts closed-loop current control, controls charging current and the discharging current of storage battery respectively;
(4), after drive system receives the pwm signal that DSP control system sends, signal drives PWM rectifier in primary heat transport system and DC/DC converter thus, to realize the two-way flow of the energy of accumulator of electric car and electrical network.
Operation principle of the present invention:
The Setting signal that real-time detection of grid side voltage, electric current and the PWM rectifier DC capacitor voltage of auto-charging and-discharging device controls as PWM rectifier.Voltage, the current loop control of PWM rectifier adopt pi regulator.The control objectives of PWM rectifier is that DC capacitor voltage is stablized, using the steady voltage source as DC/DC converter direct current device.
The decoupling zero equation of the electric current of above-mentioned said PWM rectifier under d, q coordinate system is:
Wherein, K
iIfor the integral coefficient of pi regulator; K
iPfor the proportionality coefficient of pi regulator; L and R is respectively inductance and the resistance on net survey time road; S is Logic switch function.
Because active current i
dwith reactive current i
qthe control structure of these two electric current loops is full symmetrics, thus below to the design of current inner loop adjuster all only with i
dfor example is described.All inevitably be delayed during signal sampling, current inner loop (see Fig. 6) too, has the characteristic of one order inertia, so can be expressed as 1/ (Ts+1), wherein T
sfor the sampling period of current inner loop, it is also the switch periods of PWM.Consider the little inertial properties that PWM controls, therefore be expressed as K
pWM/ (0.5Ts+1), wherein K
pWMfor the equivalent gain of bridge road PWM, the operational admittance of AC is 1/ (R+Ls).
Due to the voltage stabilization of PWM rectifier DC side electric capacity of voltage regulation, so for convenience's sake, be considered as desirable direct voltage source U here
dc.
Work as V
1with the PWM mode work of constant switching frequency, V
2during shutoff, charging current I
0from U
dcflow to E, DC/DC converter is operated in step-down (Buck) state, and electrical network is to accumulator of electric car group charging (G2V), and PWM rectifier is operated in rectification state.Otherwise, work as V
1turn off, V
2when working with the PWM mode of constant switching frequency, discharging current I
0u is flowed to from E
dc, DC/DC converter is operated in boosting (Boost) state, and accumulator of electric car group is to electrical network electric discharge (V2G), and PWM rectifier is operated in inverter mode.
The control of PWM rectifier and DC/DC converter is mainly placed in DSP control chip and passes through software simulating.Whole system programming all completes with the work of debugging DSP code in Integrated Development Environment Code Composer Studio 3.3 (CCS3.3).The software of present system adopts Structured Programming, writes based on C language.The software section of present system mainly comprises following module: main program, initialization subroutine, phase-locked program, grid line polarity of voltage determining program, timer T3 underflow interrupt service subroutine, PWM send out the modules such as wave-path sequence, A/D sampling end interrupt service subprogram, INT1 interrupt service subroutine, fault-signal interrupt service subroutine.
Superiority of the present invention is: 1. hardware designs combines with software, hardware unit simplicity of design, and software programming is easy-to-understand; 2. adopt V2G technology, the electric energy of electric automobile and electrical network can be changed mutually, electrical network and electric automobile are benefited simultaneously; 3. charging device major loop adopts the structure of PWM rectifier and DC/DC converter, nets side power factor and can be 1 during charging, nets side power factor and can be-1 during electric discharge; And current on line side is sinusoidal wave, harmonic current is little, pollution-free to electrical network, can also realize the interval charging/discharging function required by boost battery charge; 4. utilize the data of digitizing technique DSP to calculate and disposal ability, substantially increase the reliability of system; 5. there is wide market application foreground and engineer applied value.
(4) accompanying drawing illustrates:
The overall structure schematic diagram of Fig. 1 a kind of electric automobile charge and discharge device based on V2G technology involved by the present invention.
Fig. 2 is a kind of structural representation based on AC signal sampling conditioning system in the electric automobile charge and discharge device of V2G technology involved by the present invention.
Fig. 3 is a kind of structural representation based on DSP control system in the charging device of electric automobile of V2G technology involved by the present invention.
Fig. 4 is a kind of structural representation based on drive system in the electric automobile charge and discharge device of V2G technology involved by the present invention.
Fig. 5 is a kind of structural representation based on primary heat transport system in the electric automobile charge and discharge device of V2G technology involved by the present invention.
Fig. 6 is the i of decoupling zero
dcurrent inner loop structure chart.
Fig. 7 is the control structure figure of Three-Phase PWM Rectifier outer voltage.
Fig. 8 is the structure chart of DC/DC converter.
(5) embodiment:
Embodiment: a kind of electric automobile charge and discharge device (see Fig. 1) based on V2G technology, it is characterized in that it by AC signal sample conditioning system, direct voltage sample conditioning system, DSP control system, drive system and primary heat transport system form; Wherein, described primary heat transport system is that two-phase is connected with external electrical network and energy-storage system of accumulator respectively; And the input of described primary heat transport system receives the drive singal of drive system, its output connects the input of direct voltage sampling conditioning system; The input of described AC signal sampling conditioning system gathers power network signal, and its output connects the input of DSP control system; The sample output of conditioning system of input and the direct voltage of described DSP control system is connected, and its output connects the input of drive system.
Described AC signal sampling conditioning system (see Fig. 2) is made up of alternating current sampling conditioning unit and alternating voltage sampling conditioning unit; Wherein, described alternating current sampling conditioning unit is made up of Hall current instrument transformer and current regulating circuit; Described Hall current instrument transformer and current regulating circuit are unidirectional connection; Described current regulating circuit is made up of operational amplifier, low pass filter and variation convergent-divergent circuit; Described operational amplifier, low pass filter and variation convergent-divergent circuit are according to this in unidirectional connection; Described alternating voltage sampling conditioning unit is made up of Hall voltage instrument transformer and voltage modulate circuit; Described Hall voltage instrument transformer and voltage modulate circuit are unidirectional connection; Described voltage modulate circuit is made up of differential amplifier, filter and pressure limiting clamp circuit, and according to this in unidirectional connection; The described alternating current sampling output of conditioning unit is connected with the input of DSP control system respectively with the output of voltage sample conditioning unit.
Described DSP control system (see Fig. 3) is made up of A/D modular converter, control algolithm module and PWM output module; Wherein, the input of described A/D modular converter receives the output of AC signal sampling conditioning system, and its output is connected with the input of control algolithm module; The output of described control algolithm module connects the input of PWM output module; The described output of PWM output module is connected with the input of drive system.
Described primary heat transport system (see Fig. 5) is made up of PWM rectifier (see Fig. 7) and DC/DC converter (see Fig. 8); Described PWM rectifier through DC side electric capacity of voltage regulation and DC/DC converter in being bi-directionally connected; Described DC/DC converter and storage battery are bi-directionally connected; The power electronic device that described PWM rectifier and DC/DC converter use is insulated gate bipolar transistor IGBT; The emitter E of described IGBT, collector electrode C and grid G are by drive systems.
Described drive system (see Fig. 4) is made up of pull down resistor, the M579 driving chip that can be used for IGBT driving, two triodes and voltage stabilizing didoe; Wherein, described pull down resistor is as input resistance, and one termination receives the output signal of DSP control system; The other end is connected with the input of M579 family chip; The output of described M579 family chip connects the base stage of two triodes respectively; The series connection point of another terminal output signal of described M579 chip, two triodes draws the input signal of output signal respectively as collector electrode C, grid G and the emitter E in primary heat transport system of signal and voltage stabilizing didoe.
Based on a charging/discharging thereof for the electric automobile charge and discharge device of V2G technology, it is characterized in that it comprises the following steps:
(1) AC signal sampling conditioning system is connected with external power grid, and real-time detection and conditioning net survey voltage, current signal; Direct voltage sampling conditioning system is connected with the PWM rectifier DC side electric capacity of voltage regulation in primary heat transport system, the magnitude of voltage of real-time detection electric capacity of voltage regulation;
(2) AC signal sampling conditioning system is connected with DSP control system respectively with direct voltage sampling conditioning system, by the analog signal of sampling in the A/D module receiving step (1) of DSP control system inside, then convert it into the discernible digital signal of control algolithm module of DSP control system;
(3) the control algolithm module of DSP control system obtain according to step (2) voltage, current signal value, by PWM output module produce pwm signal; Control algolithm module mainly comprises the control algolithm of PWM rectifier and the control algolithm of DC/DC converter; The control algolithm of PWM rectifier adopts Double closed-loop of voltage and current, and control objectives ensures that DC side voltage of voltage regulation is constant; The control of DC/DC converter adopts closed-loop current control, controls charging current and the discharging current of storage battery respectively;
(4), after drive system receives the pwm signal that DSP control system sends, signal drives PWM rectifier in primary heat transport system and DC/DC converter thus, to realize the two-way flow of the energy of accumulator of electric car and electrical network.
Claims (6)
1., based on an electric automobile charge and discharge device for V2G technology, it is characterized in that it comprises AC signal sampling conditioning system, direct voltage sampling conditioning system, DSP control system, drive system and primary heat transport system; Wherein, described primary heat transport system is that two-phase is connected with external electrical network and energy-storage system of accumulator respectively; And the input of described primary heat transport system receives the drive singal of drive system, its output connects the input of direct voltage sampling conditioning system; The input of described AC signal sampling conditioning system gathers power network signal, and its output connects the input of DSP control system; The sample output of conditioning system of input and the direct voltage of described DSP control system is connected, and its output connects the input of drive system.
2. a kind of electric automobile charge and discharge device based on V2G technology according to claim 1, is characterized in that described AC signal sampling conditioning system is made up of alternating current conditioning unit and alternating voltage conditioning unit of sampling of sampling; Wherein, described alternating current sampling conditioning unit is made up of Hall current instrument transformer and current regulating circuit; Described Hall current instrument transformer and current regulating circuit are unidirectional connection; Described current regulating circuit is made up of operational amplifier, low pass filter and variation convergent-divergent circuit; Described operational amplifier, low pass filter and variation convergent-divergent circuit are according to this in unidirectional connection; Described alternating voltage sampling conditioning unit is made up of Hall voltage instrument transformer and voltage modulate circuit; Described Hall voltage instrument transformer and voltage modulate circuit are unidirectional connection; Described voltage modulate circuit is made up of differential amplifier, filter and pressure limiting clamp circuit, and according to this in unidirectional connection; The described alternating current sampling output of conditioning unit is connected with the input of DSP control system respectively with the output of voltage sample conditioning unit.
3. a kind of electric automobile charge and discharge device based on V2G technology according to claim 1, is characterized in that described DSP control system is made up of A/D modular converter, control algolithm module and PWM output module; Wherein, the input of described A/D modular converter receives the output of AC signal sampling conditioning system, and its output is connected with the input of control algolithm module; The output of described control algolithm module connects the input of PWM output module; The described output of PWM output module is connected with the input of drive system.
4. a kind of electric automobile charge and discharge device based on V2G technology according to claim 1, is characterized in that described primary heat transport system is made up of PWM rectifier and DC/DC converter; Described PWM rectifier through DC side electric capacity of voltage regulation and DC/DC converter in being bi-directionally connected; Described DC/DC converter and storage battery are bi-directionally connected; The power electronic device that described PWM rectifier and DC/DC converter use is insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor); The emitter E of described IGBT, collector electrode C and grid G are by drive systems.
5. a kind of electric automobile charge and discharge device based on V2G technology according to claim 1, it is characterized in that described drive system by pull down resistor, can be used for M579 driving chip, two triodes and voltage stabilizing didoe that IGBT drives and form; Wherein, described pull down resistor is as input resistance, and one termination receives the output signal of DSP control system; The other end is connected with the input of M579 family chip; The output of described M579 family chip connects the base stage of two triodes respectively; The series connection point of another terminal output signal of described M579 chip, two triodes draws the input signal of output signal respectively as collector electrode C, grid G and the emitter E in primary heat transport system of signal and voltage stabilizing didoe.
6., based on a charging/discharging thereof for the electric automobile charge and discharge device of V2G technology, it is characterized in that it comprises the following steps:
(1) AC signal sampling conditioning system is connected with external power grid, and real-time detection and conditioning net survey voltage, current signal; Direct voltage sampling conditioning system is connected with the PWM rectifier DC side electric capacity of voltage regulation in primary heat transport system, the magnitude of voltage of real-time detection electric capacity of voltage regulation;
(2) AC signal sampling conditioning system is connected with DSP control system respectively with direct voltage sampling conditioning system, by the analog signal of sampling in the A/D module receiving step (1) of DSP control system inside, then convert it into the discernible digital signal of control algolithm module of DSP control system;
(3) the control algolithm module of DSP control system obtain according to step (2) voltage, current signal value, by PWM output module produce pwm signal; Control algolithm module mainly comprises the control algolithm of PWM rectifier and the control algolithm of DC/DC converter; The control algolithm of PWM rectifier adopts Double closed-loop of voltage and current, and control objectives ensures that DC side voltage of voltage regulation is constant; The control of DC/DC converter adopts closed-loop current control, controls charging current and the discharging current of storage battery respectively;
(4), after drive system receives the pwm signal that DSP control system sends, signal drives PWM rectifier in primary heat transport system and DC/DC converter thus, to realize the two-way flow of the energy of accumulator of electric car and electrical network.
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| CN111369741A (en) * | 2020-03-13 | 2020-07-03 | 南京润北智能环境研究院有限公司 | System for matching multiple parking lots with shared parking spaces and electric vehicles in electric power market |
| CN114179642A (en) * | 2021-11-22 | 2022-03-15 | 泉州装备制造研究所 | New energy automobile bidirectional charging and discharging device based on strong robust predictive control algorithm |
| US11949330B2 (en) | 2021-10-19 | 2024-04-02 | Volvo Car Corporation | Integrated power conversion topology for electric vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107026496A (en) * | 2016-02-02 | 2017-08-08 | 天津理工大学 | A kind of bidirectional electric automobile charge and discharge device and method based on auto-disturbance rejection technology |
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Application publication date: 20150204 |