CN203645387U - Rail transport voltage balancing device - Google Patents
Rail transport voltage balancing device Download PDFInfo
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- CN203645387U CN203645387U CN201320780926.8U CN201320780926U CN203645387U CN 203645387 U CN203645387 U CN 203645387U CN 201320780926 U CN201320780926 U CN 201320780926U CN 203645387 U CN203645387 U CN 203645387U
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- voltage
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- 238000004146 energy storage Methods 0.000 claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 206010017577 Gait disturbance Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model provides a rail transport voltage balancing device, which belongs to the field of rail transport. The device comprises a DC power converter, an energy storage unit and a control unit. When a voltage of a power supply bus is higher than a preset range, the DC power converter converts the high voltage to a low voltage under the control of the control unit and stores electric energy in the energy storage unit. When the voltage of the power supply bus is lower than the preset range, the DC power converter converts the voltage of the energy storage unit to a voltage within the preset range, supplies the power supply bus with power, and maintains a voltage balance of the power supply bus. The device makes rail transport vehicles green, clean and energy-saving through maintaining the voltage balance of a power supply system.
Description
Technical field
The utility model relates to field of track traffic, relates in particular to track traffic voltage balancing device.
Background technology
Along with the surge of domestic and international big and medium-sized cities population, Urban Traffic Jam Based becomes the stumbling-block that affects economic development day by day, and because having, its handling capacity of passengers is large, the advantage such as operate steadily, on schedule, do not block up is adopted by increasing city in track traffic.
The electric power system of what at present China mainly adopted is 750 volts of direct currents is powered to track traffic, but most the urban transportations adopts and do not control rectifier system, and characteristic is partially soft.At rail traffic vehicles during too much and in traction state, the busbar voltage of electric power system can significantly be dragged down, when vehicle is during in on-position, electric power system busbar voltage can significantly be raised, therefore vehicle adopts the mode of installation brake resistance to suppress the rising of busbar voltage more, will improve like this cost of vehicle, increase the step of safeguarding of vehicle.Simultaneously, what the only a few track circuit of use energy absorption device adopted is ground brake resistance absorption plant, although the energy having produced while having absorbed railcar braking, but these brake resistances have become braking energy into heat energy completely, really do not accomplish energy-conservationly, be unfavorable for that rail traffic vehicles returns green, clean.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of track traffic voltage balancing device, to solve the problems such as urban track traffic green energy conservation.
For solving the problems of the technologies described above, the track traffic voltage balancing device that the utility model provides, comprising:
DC power convertor, one end is connected with a utmost point of described power supply buses, and the polarity of link is identical;
Energy-storage units, one end is connected with described DC power convertor, the other end is connected with another utmost point of described power supply buses, and the polarity of link is identical;
Control unit, is connected with described DC power convertor and described energy-storage units respectively, for controlling the operating state of described DC power convertor and described energy-storage units,
Wherein, the voltage of described power supply buses is during higher than preset range, the rated voltage that described DC power convertor is described energy-storage units by voltage transitions under the control of described control unit, gives the charging of described energy-storage units, by electrical power storage in described energy-storage units; The voltage of described power supply buses is during lower than preset range, under the control of described control unit, the voltage of described energy-storage units is converted into the voltage in preset range by described DC power convertor, described energy-storage units externally discharges, give described power supply buses power supply, maintain the balance of voltage of described power supply buses.
Preferably, also comprise the first protective device for the protection of described power supply buses, described the first protective device is arranged on described power supply buses.
Preferably, also comprise the second protective device for the protection of described DC power convertor and described energy-storage units, described the second protective device setting is connected with described DC power convertor.
Preferably, between described DC power convertor and described energy-storage units for connecting;
Preferably, described energy-storage units is super capacitor.
The track traffic voltage balancing device that the utility model provides makes rail traffic vehicles return green, clean, energy-conservation by maintaining the balance of voltage of electric power system.
Accompanying drawing explanation
Fig. 1 is the structure chart of the track traffic voltage balancing device of the utility model embodiment;
Fig. 2 is the control principle drawing of the DC converter of the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
Fig. 1 is the structure chart of the track traffic voltage balancing device of the utility model embodiment, and as shown in Figure 1, this track traffic voltage balancing device comprises:
DC power convertor, this DC power convertor is DC converter 1, and one end that a utmost point of DC converter 1 is identical with the power supply buses polarity of the electric power system 3 of track subway connects, for example, be connected with the main track 31 of power supply buses;
Also comprise the energy-storage units of connecting with described DC converter 1, this energy-storage units is a super capacitor 2, and the positive pole of this super capacitor 2 is connected with the positive pole of described DC converter 1, the negative pole of super capacitor 2 and the negative wire of described power supply buses 32 are connected;
Also comprise control unit 5, this control unit 5 is connected with described DC converter 1 and described super capacitor 2 respectively, for controlling the operating state of described DC converter 1 and described super capacitor 2.
In urban track traffic operation process, in the time of car brakeing, can make because bearing power diminishes again power supply buses voltage raise.And in the time that many cars draw simultaneously, can make because the power of load is excessive the lower voltage of power supply buses, now undertension is with the normal operation of orbit keeping traffic.
On the one hand, in the time of car brakeing, the voltage of described power supply buses raises and higher than preset range, in the present embodiment, preset value voltage range is 600-900V.Be the voltage of described power supply buses higher than 900V, under the control of described control unit 5, described DC converter 1 is converted to high voltage the rated voltage of super capacitor 2, and give super capacitor 2 charge, by electrical power storage in super capacitor 2.
On the other hand, and in the time that many cars draw simultaneously, the voltage of described power supply buses is lower than 600V, and under the control of described control unit 5, described DC converter 1 is elevated to the voltage of super capacitor 2 within the scope of 600-900V, in the present embodiment, is preferably elevated to 750V.Now super capacitor 2 externally discharges, and gives described power supply buses power supply, makes the voltage recovery of described power supply buses to 750V, to maintain the balance of voltage of power supply buses, guarantees the normal operation of rail electric car.
The utility model is owing to being provided with DC power convertor and energy-storage units between power supply buses, in the time that the voltage of power supply buses raises, by electrical power storage in energy-storage units, and in the time of the lower voltage of goddess of lightning's line, energy-storage units externally discharges, to supplement voltage to power supply buses, maintain the balance of voltage of power supply buses, thereby guarantee the normal operation of rail electric car, avoid because adopting brake resistance absorption plant to produce heat energy, and then avoided energy dissipation, rail traffic vehicles is returned green, clean, energy-conservation.
With reference to Fig. 1, in order to protect power supply buses, while avoiding voltage to raise, power supply buses is burnt out, the first protective device 41 is set on described power supply buses.
With reference to Fig. 1, in order to protect DC converter 1 and super capacitor 2, while avoiding voltage to raise, DC converter 1 and super capacitor 2 are burnt out, on described DC converter 1, be also in series with one second protective device 42.
The course of work of following brief description DC converter 1:
Fig. 2 is the control principle drawing of DC converter, as shown in Figure 2 and in conjunction with Fig. 1, DC power convertor comprises DC converter 1 and DC current transformer 11, the voltage that power supply buses detected when DC converter 1 is during higher than 900V, control unit 5 is controlled DC current transformer 11 super capacitor 2 is charged, and now DC current transformer 11 adopts BUCK mode, goes up the duty ratio of bridge by control, adjusting is charged to the voltage on super capacitor 2, and super capacitor is steadily charged.
In the time that DC converter 1 detects that the voltage of power supply buses is within the scope of 600-900V, DC current transformer 11 quits work.
The voltage that power supply buses detected when DC converter 1 is during lower than 600V, control unit 5 is controlled DC current transformer 11 super capacitor 2 is discharged, now the low-tension supply on super capacitor 2 is become to the traction power source within the scope of 600-900V, adopt BOOST mode, the duty ratio of descending bridge by control, makes output voltage stabilization at 750V.
Finally it should be noted that: above each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of the each embodiment technical scheme of the utility model.
Claims (5)
1. a track traffic voltage balancing device, for controlling the balance of voltage of power supply buses, is characterized in that, comprising:
DC power convertor, one end is connected with a utmost point of described power supply buses;
Energy-storage units, one end is connected with described DC power convertor, the other end is connected with another utmost point of described power supply buses;
Control unit, is connected with described DC power convertor and described energy-storage units respectively, for controlling the operating state of described DC power convertor and described energy-storage units,
Wherein, the voltage of described power supply buses is during higher than preset range, the rated voltage that described DC power convertor is described energy-storage units by voltage transitions under the control of described control unit, gives the charging of described energy-storage units, by electrical power storage in described energy-storage units; The voltage of described power supply buses is during lower than preset range, under the control of described control unit, the voltage of described energy-storage units is converted into the voltage in preset range by described DC power convertor, described energy-storage units externally discharges, give described power supply buses power supply, maintain the balance of voltage of described power supply buses.
2. track traffic voltage balancing device according to claim 1, is characterized in that, also comprises the first protective device for the protection of described power supply buses, and described the first protective device is arranged on described power supply buses.
3. track traffic voltage balancing device according to claim 1; it is characterized in that; also comprise the second protective device for the protection of described DC power convertor and described energy-storage units, described the second protective device setting is connected with described DC power convertor.
4. track traffic voltage balancing device according to claim 1, is characterized in that, described energy-storage units is super capacitor.
5. track traffic voltage balancing device according to claim 1, is characterized in that, between described DC power convertor and described energy-storage units for connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780926.8U CN203645387U (en) | 2013-11-28 | 2013-11-28 | Rail transport voltage balancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780926.8U CN203645387U (en) | 2013-11-28 | 2013-11-28 | Rail transport voltage balancing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203645387U true CN203645387U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320780926.8U Expired - Lifetime CN203645387U (en) | 2013-11-28 | 2013-11-28 | Rail transport voltage balancing device |
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| Country | Link |
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| CN (1) | CN203645387U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333121A (en) * | 2014-11-17 | 2015-02-04 | 济南轨道交通装备有限责任公司 | DC continuous power supply system applied to cleaning trolley of subway tunnel |
| CN104682534A (en) * | 2013-11-28 | 2015-06-03 | 北车大连电力牵引研发中心有限公司 | Rail transit voltage balancing device |
-
2013
- 2013-11-28 CN CN201320780926.8U patent/CN203645387U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682534A (en) * | 2013-11-28 | 2015-06-03 | 北车大连电力牵引研发中心有限公司 | Rail transit voltage balancing device |
| CN104333121A (en) * | 2014-11-17 | 2015-02-04 | 济南轨道交通装备有限责任公司 | DC continuous power supply system applied to cleaning trolley of subway tunnel |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 116045 Liaoning province Dalian City Lushun Economic Development Zone No. 1 North Street, Hao Yang Patentee after: CRRC DALIAN ELECTRIC TRACTION R & D CENTER CO., LTD. Address before: 116045 Liaoning province Dalian City Lushun Economic Development Zone No. 1 North Street, Hao Yang Patentee before: Co., Ltd of Bei Che Dalian Electric Traction R & D Center |