CN203166599U - Topological structure for main circuit of charging station of electric automobile - Google Patents
Topological structure for main circuit of charging station of electric automobile Download PDFInfo
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- CN203166599U CN203166599U CN201320039826XU CN201320039826U CN203166599U CN 203166599 U CN203166599 U CN 203166599U CN 201320039826X U CN201320039826X U CN 201320039826XU CN 201320039826 U CN201320039826 U CN 201320039826U CN 203166599 U CN203166599 U CN 203166599U
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- main circuit
- electric automobile
- topological structure
- pwm rectifier
- charging station
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Abstract
The utility model provides a topological structure for a main circuit of a charging station of an electric automobile. The topological structure for the main circuit comprises a storage battery of the electric automobile, a charging machine of the electric automobile, a PWM rectifier and a three-phase transformer which are successively connected, wherein the three-phase transformer is connected with an AC power supply. The topological structure can effectively raise a charging energy-efficiency level of the charging machine of the electric automobile, correct power factors, solve problems of the power factors and current wave quality, reduce harmonic wave pollution of a DC charging system on an electrical network, effectively reduce electric energy loss of the charging station and raise overall energy efficiency.
Description
Technical field
The utility model belongs to the Modern Transportation Technology field, is specifically related to a kind of electric automobile charging station main circuit topological structure.
Background technology
" 12 " planning is listed in new-energy automobile development based on electric automobile in, becomes the Important Project of China's energy-saving and emission-reduction, promotion industrial upgrading.Every profession and trade is all actively developed the pilot building-up work that electric automobile and alternating-current charging pile, direct current fill infrastructure such as electrical changing station.The electric automobile pilot construction project of Public Service Field such as taxi, environmental sanitation car, bus is carried out rapidly, expect about 2015, can build up in 20 above Model Cities and neighboring area by 400,000 charging piles, 2000 and fill the networked power supply system that electrical changing station constitutes, satisfy electric automobile large-scale commercial applications demonstration energy resource supply demand.
Charging station provides energy supply for electric automobile operation, is the important foundation support system of electric automobile, also is the important step in electric automobile commercialization, the industrialization process, and the industry development of electric automobile is had significant impact.And the supply power mode of charging station mainly is independent AC charging mode now, adopts three-phase alternating current as input power supply, each charger incoming transport bus.Each charger has complete power conversion circuit, comprises parts such as diode rectifier bridge, LC filtering link, DC/DC converter, the input diode rectification.Because each charger has the ac-dc conversion device, cause entire system efficient lower, because to not control of output voltage, output voltage changes greatly with the fluctuation of load, make the design of next stage circuit must reserve certain allowance, cause the restriction to the device service efficiency, and the input current harmonic content is very abundant, net side power factor is low, and is big to the pollution of electrical network.If in large-scale charging station, when many chargers were worked simultaneously, the harmonic wave of generation and reactive power problem can produce tremendous influence to electrical network and other power consumption equipments.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of electric automobile charging station main circuit topological structure.Can effectively improve the charging efficiency level of charging electric vehicle machine, realize the correction of power factor, solve problems such as power factor and current waveform quality, reduce DC charging system to the harmonic pollution of electrical network, can effectively reduce the electric energy loss of charging station, improve whole efficiency.
To achieve these goals, the utility model is taked following scheme:
A kind of electric automobile charging station main circuit topological structure is provided, comprises accumulator of electric car, charging electric vehicle machine, PWM rectifier and three-phase transformer; Described accumulator of electric car, charging electric vehicle machine, PWM rectifier are connected successively with three-phase transformer, and described three-phase transformer connects AC power; Described accumulator of electric car is lithium-ions battery.
Described charging electric vehicle machine comprises non-isolation DC/DC converter; Described non-isolation DC/DC converter is voltage-dropping type non-isolation DC/DC converter.
The main circuit of described non-isolation DC/DC converter comprises IGBT, fly-wheel diode, filter inductance and electric capacity, described IGBT and fly-wheel diode inverse parallel, load current is exponential curve and rises during described IGBT conducting, load current was through the fly-wheel diode afterflow when IGBT turn-offed, and load current is exponential curve and descends.
Described PWM rectifier is three-phase bridge PWM rectifier; Described three-phase bridge PWM rectifier adopts Direct Current Control, obtain interchange input current command value by computing, introducing alternating current feedback, make its trace command current value by the direct control to alternating current, it is sinusoidal wave that its input current is approached, and with the input voltage same-phase, power factor is approximately 1.
Described three-phase bridge PWM rectifier adopts DC bus powered mode to provide DC power supply for the charging electric vehicle machine.
Described three-phase transformer is step-down transformer, and it is reduced to 0.4kV voltage with grid side 10kV voltage and offers the charging electric vehicle machine through the PWM rectifier.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model is integrated and is utilized DC bus powered mode, PWM commutation technique, charging electric vehicle machine only to comprise non-isolation DC-DC converter, effectively reduce the energy consumption of charging electric vehicle machine, improved whole efficiency, having solved in the past, each charging electric vehicle machine has the ac-dc conversion device, entire system efficient is lower, problems such as harmonic content is bigger, and the components and parts service efficiency is low;
2, the utility model is used three-phase bridge PWM rectifier, the double closed-loop control system that is constituted by current inner loop, outer voltage, adopt the SPWM algorithm that input current, output voltage are controlled, realize that grid side current sinusoidalization, unity power factor and DC bus-bar voltage are stable;
3, the charging electric vehicle machine that proposes of the utility model is only used non-isolation type DC/DC converter, compare the voltage that a plurality of grades of levels can be provided according to the storage battery needs with the isolation DC-DC converter that traditional charging electric vehicle machine adopts, can not make supply current excessive again, efficient is higher, volume is littler, and circuit is simpler.
Description of drawings
Fig. 1 is electric automobile charging station main circuit topological structure schematic diagram among the utility model embodiment;
Fig. 2 is the main circuit topological structure figure of non-isolation DC among the utility model embodiment/DC converter.
Fig. 3 is charging electric vehicle machine control strategy schematic diagram among the utility model embodiment;
Fig. 4 is PWM rectifier control strategy schematic diagram among the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As Fig. 1, a kind of electric automobile charging station main circuit topological structure is provided, comprise accumulator of electric car, charging electric vehicle machine, PWM rectifier and three-phase transformer; Described accumulator of electric car, charging electric vehicle machine, PWM rectifier are connected successively with three-phase transformer, and described three-phase transformer connects AC power; Described accumulator of electric car is lithium-ions battery.
Described charging electric vehicle machine comprises non-isolation DC/DC converter; Described non-isolation DC/DC converter is voltage-dropping type non-isolation DC/DC converter.
As Fig. 2, the main circuit of described non-isolation DC/DC converter comprises IGBT, fly-wheel diode, filter inductance and electric capacity, described IGBT and fly-wheel diode inverse parallel, load current is exponential curve and rises during described IGBT conducting, load current was through the fly-wheel diode afterflow when IGBT turn-offed, and load current is exponential curve and descends.Non-isolation DC/DC converter has characteristics such as circuit is simple, volume is little, and output ripple is littler, and its carrying load ability is stronger under the situation of identical inductances peak current, so efficient is also higher, and non-isolation DC/DC transducer effciency reaches as high as 97%.The type charging electric vehicle machine control strategy as shown in Figure 3.
As Fig. 4, described PWM rectifier is three-phase bridge PWM rectifier; Described three-phase bridge PWM rectifier adopts Direct Current Control, obtain interchange input current command value by computing, introducing alternating current feedback, make its trace command current value by the direct control to alternating current, it is sinusoidal wave that its input current is approached, and with the input voltage same-phase, power factor is approximately 1.
The PWM rectifier has been widely used in the AC and DC transmission system now, has the power factor height,, system little near unity power factor, harmonic content need not add advantages such as harmonic wave and reactive power compensator, can effectively reduce the pollution to electrical network.PWM rectifier control principle figure as shown in Figure 2, the method for comparing according to sinusoidal signal ripple and triangular wave is to the T among Fig. 2
11, T
12, T
21, T
22, T
31, T
32Carry out SPWM control, just can obtain SPWM voltage at the ac input end of bridge, contain in the gained voltage and sinusoidal signal ripple same frequency and the proportional fundametal compoment of amplitude, and the very high harmonic wave of the frequency relevant with triangular carrier, and do not contain low-order harmonic.Because the filter action of inductance, higher harmonic voltage only can make alternating current produce very little pulsation, can ignore.Like this, when the sinusoidal signal wave frequency is identical with supply frequency, each phase current also is the sine wave identical with supply frequency, under the certain situation of alternating voltage, the amplitude of each phase current and phase place only have the amplitude of fundametal compoment in the voltage and decide with the phase difference of phase voltage, so just can obtain the phase difference of needed voltage and electric current, make input current waveform approach sinusoidal and with input electrical network same-phase, thereby obtain unity power factor; Switching logic control methods such as application SPWM make the output voltage of PWM rectification circuit change with given instruction, export stable VD.
Described three-phase bridge PWM rectifier adopts DC bus powered mode to provide DC power supply for the charging electric vehicle machine, has avoided the restriction of the power transmission capacity that the existence of reactive power causes, and need not a large amount of ac-dc conversion devices, and efficient is higher.
Described three-phase transformer is step-down transformer, and it is reduced to 0.4kV voltage with grid side 10kV voltage and offers the charging electric vehicle machine through the PWM rectifier.
This electric automobile charging station main circuit topological structure that the utility model provides adopts high-power PWM rectifier that the three-phase alternating current of input is carried out rectification, after filtering, form stable VD, offer the charger that only comprises non-isolation DC/DC converter the electric automobile on-vehicle battery is charged.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (6)
1. an electric automobile charging station main circuit topological structure is characterized in that: comprise accumulator of electric car, charging electric vehicle machine, PWM rectifier and three-phase transformer; Described accumulator of electric car, charging electric vehicle machine, PWM rectifier are connected successively with three-phase transformer, and described three-phase transformer connects AC power; Described accumulator of electric car is lithium-ions battery.
2. electric automobile charging station main circuit topological structure according to claim 1, it is characterized in that: described charging electric vehicle machine comprises non-isolation DC/DC converter; Described non-isolation DC/DC converter is voltage-dropping type non-isolation DC/DC converter.
3. electric automobile charging station main circuit topological structure according to claim 2, it is characterized in that: the main circuit of described non-isolation DC/DC converter comprises IGBT, fly-wheel diode, filter inductance and electric capacity, described IGBT and fly-wheel diode inverse parallel, load current is exponential curve and rises during described IGBT conducting, load current was through the fly-wheel diode afterflow when IGBT turn-offed, and load current is exponential curve and descends.
4. electric automobile charging station main circuit topological structure according to claim 1, it is characterized in that: described PWM rectifier is three-phase bridge PWM rectifier; Described three-phase bridge PWM rectifier adopts Direct Current Control, obtain interchange input current command value by computing, introducing alternating current feedback, make its trace command current value by the direct control to alternating current, it is sinusoidal wave that its input current is approached, and with the input voltage same-phase, power factor is approximately 1.
5. electric automobile charging station main circuit topological structure according to claim 4, it is characterized in that: described three-phase bridge PWM rectifier adopts DC bus powered mode to provide DC power supply for the charging electric vehicle machine.
6. electric automobile charging station main circuit topological structure according to claim 1, it is characterized in that: described three-phase transformer is step-down transformer, it is reduced to 0.4kV voltage with grid side 10kV voltage and offers the charging electric vehicle machine through the PWM rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320039826XU CN203166599U (en) | 2013-01-24 | 2013-01-24 | Topological structure for main circuit of charging station of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320039826XU CN203166599U (en) | 2013-01-24 | 2013-01-24 | Topological structure for main circuit of charging station of electric automobile |
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| CN203166599U true CN203166599U (en) | 2013-08-28 |
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| CN201320039826XU Expired - Lifetime CN203166599U (en) | 2013-01-24 | 2013-01-24 | Topological structure for main circuit of charging station of electric automobile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269900A (en) * | 2014-09-26 | 2015-01-07 | 国家电网公司 | Main wiring system of electric automobile charging station system |
| CN104701961A (en) * | 2013-12-09 | 2015-06-10 | 北车大连电力牵引研发中心有限公司 | Charging device |
| CN105322624A (en) * | 2014-07-07 | 2016-02-10 | 上海稳得新能源科技有限公司 | New-energy automobile energy-saving series charger device |
| CN108528263A (en) * | 2018-06-08 | 2018-09-14 | 重庆聚陆新能源有限公司 | A kind of efficient electric vehicle direct current charge system |
-
2013
- 2013-01-24 CN CN201320039826XU patent/CN203166599U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701961A (en) * | 2013-12-09 | 2015-06-10 | 北车大连电力牵引研发中心有限公司 | Charging device |
| CN104701961B (en) * | 2013-12-09 | 2018-01-09 | 中车大连电力牵引研发中心有限公司 | Charging equipment |
| CN105322624A (en) * | 2014-07-07 | 2016-02-10 | 上海稳得新能源科技有限公司 | New-energy automobile energy-saving series charger device |
| CN104269900A (en) * | 2014-09-26 | 2015-01-07 | 国家电网公司 | Main wiring system of electric automobile charging station system |
| CN108528263A (en) * | 2018-06-08 | 2018-09-14 | 重庆聚陆新能源有限公司 | A kind of efficient electric vehicle direct current charge system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |
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| CX01 | Expiry of patent term |