CN104960428A - Double-source trolley bus and isolated power supply system thereof - Google Patents
Double-source trolley bus and isolated power supply system thereof Download PDFInfo
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- CN104960428A CN104960428A CN201510312238.2A CN201510312238A CN104960428A CN 104960428 A CN104960428 A CN 104960428A CN 201510312238 A CN201510312238 A CN 201510312238A CN 104960428 A CN104960428 A CN 104960428A
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- isolated
- trackless trolley
- trolley car
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a double-source trolley bus and an isolated power supply system thereof. The isolated power supply system comprises an isolated DC/DC converter, wherein the input end of the isolated DC/DC converter is connected with a current collector, and the output end of the isolated DC/DC converter is connected with a direct current bus; an energy storing device is connected to the direct current bus; the direct current bus is also connected with a high-voltage electrical system; a fuel cell system is also connected to the input end of the isolated DC/DC converter. Because the fuel cell system is adopted as a power source, when the voltage of wires fluctuates, a power cell system of fuel cells supplies energy through the main DC/DC converter, so that the stability of an output voltage is guaranteed, and the stability of the isolated power supply system of the trolley bus is improved.
Description
Technical field
The invention belongs to trackless trolley car for electrical domain, be specifically related to a kind of double source trackless trolley car and isolated electric power system thereof.
Background technology
The title that trackless trolley car have " green public transport ", relative to city motor bus, it directly uses the electric energy of wide material sources, decreases the use to the fossil energy such as oil, natural fuels; When car brakeing, it can utilize regenerative brake by kinetic transformation for electric energy feedback is to gauze, improves the degree of utilization of the energy; Meanwhile, the noise that the traction motor of trackless trolley car operationally produces will lower than the combustion engine of automobile, and the fricative noise of its rubber tire is very little, adds the comfort level taken; And, owing to not using fuel and machine oil, make its clean hygiene, maintenance simply.Therefore, trackless trolley car is the track vehicle of a kind of energy-conserving and environment-protective, comfort and health, has good development prospect.
Traditional trackless trolley car is extremely disputed on because there is high-voltage safety problem, and it cannot realize the high_voltage isolation with gauze, when vehicle failure of insulation, easily makes vehicle be communicated with the earth, produces the injury that the person gets an electric shock.And high pressure failpoint is many, failure risk is large.If increase spacer assembly separately in car load power-supply system, then there is the shortcomings such as module repeats, design redundancy, trackless trolley car traditional in addition cannot realize off-line and run, and when gauze breaks down or maintain, vehicle cannot movement flexibly.
Publication No. is the isolated electric power system that the patent document of CN204055405U discloses a kind of trackless trolley car.Comprise the isolated DC/DC conv for being connected with current colector, isolated DC/DC conv connects electrokinetic cell system, and described isolated DC/DC conv has alternating-current charging interface, and described electrokinetic cell system has direct-current charging interface.When car load hanging net operation, this power system connects gauze by current colector, and electrical network is charged to electrokinetic cell system by isolated DC/DC conv, and electrokinetic cell system provides car load demand power; When car load off-grid runs, electrokinetic cell system is powered to car load simultaneously.Gauze and car load are isolated by isolated DC/DC current transformer by this power system, improve the safety of trackless trolley car; Powered to car load by electrokinetic cell system, the off-line achieving trackless trolley car runs.But, when gauze voltage fluctuation, may power demand of motors be met; Meanwhile, because needs are to electrokinetic cell system charging, gauze output voltage can be reduced further.Therefore, the less stable of this power system.
Summary of the invention
The object of this invention is to provide a kind of double source trackless trolley car and isolated electric power system thereof, in order to solve trackless trolley car power system less stable problem of the prior art.
For achieving the above object, the solution of the present invention comprises:
The isolated electric power system of a kind of trackless trolley car, comprise isolated DC/DC conv, isolated DC/DC switch input is for connecting current colector, mouth connects DC bus, DC bus is connected with closed-center system, DC bus is also for connecting high-voltage electric system, and the input end of described isolated DC/DC conv is also connected with fuel cell system.
Described closed-center system is super capacitor system.
Be connected with master cock K3 between the input end of described fuel cell system and isolated DC/DC conv and prevent current colector to the diode of fuel cell system conveying capacity.
The control part of the isolated electric power system of described trackless trolley car comprises HCU, and HCU is by control bus connecting fuel battery system, the driving circuit of isolated DC/DC or control circuit.
Pre-charge circuit is provided with between described current colector and described isolated DC/DC switch input; Described pre-charge circuit connects current colector by counnter attack diode.
Described pre-charge circuit comprises preliminary filling branch road that two parallel connections and flings branch road; Described preliminary filling branch road comprises and controls gauze and to power the master cock K1 of break-make, and K1 is in series with a resistor; The described branch road that directly fills comprises and controls gauze and to power the master cock K2 of break-make.
A kind of trackless trolley car, comprise the isolated electric power system of trackless trolley car, the isolated electric power system of described trackless trolley car comprises isolated DC/DC conv, isolated DC/DC switch input is for connecting current colector, mouth connects DC bus, DC bus is connected with closed-center system, and DC bus is also for connecting high-voltage electric system, and the input end of described isolated DC/DC conv is also connected with fuel cell system.
Described closed-center system is super capacitor system.
Be connected with master cock K3 between the input end of described fuel cell system and isolated DC/DC conv and prevent current colector to the diode of fuel cell system conveying capacity.
Pre-charge circuit is provided with between described current colector and described isolated DC/DC switch input; Described pre-charge circuit connects current colector by counnter attack diode.
Described pre-charge circuit comprises preliminary filling branch road that two parallel connections and flings branch road; Described preliminary filling branch road comprises and controls gauze and to power the master cock K1 of break-make, and K1 is in series with a resistor; The described branch road that directly fills comprises and controls gauze and to power the master cock K2 of break-make.
Double source trackless trolley car provided by the invention and isolated electric power system thereof, owing to have employed fuel cell system as propulsion source, when gauze voltage fluctuation, fuel cell motive force battery system provides energy by main DC/DC conv, ensure the stable of output voltage, improve the stability of the isolated electric power system of trackless trolley car.
Owing to being connected with diode between fuel cell system and the input end of isolated DC/DC conv, gauze can being prevented to fuel cell system conveying capacity, improve the service life of fuel cell system.
Owing to being connected with pre-charge circuit, when can prevent from starting to charge, charging current is excessive causes damage to equipment.
Regulate isolated DC/DC converter output end voltage by whole-control system, guarantee that super capacitor system has rational volume space to store the braking energy of feedback.
Between isolated DC/DC conv, connect charge circuit by the DC output end at current colector, ensure that the safety of electric power system.
Accompanying drawing explanation
Fig. 1 is the basic scheme schematic diagram of the embodiment of the present invention.
Fig. 2 is the concrete scheme schematic diagram of the embodiment of the present invention.
Detailed description of the invention
Basic scheme of the present invention as shown in Figure 1, the isolated electric power system of trackless trolley car comprises isolated DC/DC conv, isolated DC/DC switch input is for connecting current colector, mouth connects DC bus, DC bus is connected with closed-center system, DC bus is also for connecting high-voltage electric system, and the input end of described isolated DC/DC conv is also connected with fuel cell system.
Concrete, below the technical characteristic related in above-mentioned basic scheme is specifically described.
Concrete scheme of the present invention as shown in Figure 2, the isolated electric power system of trackless trolley car comprises isolated DC/DC conv, isolated DC/DC switch input is for connecting current colector, mouth connects DC bus, DC bus is connected with super capacitor system, DC bus is also for connecting high-voltage electric system, and the input end of described isolated DC/DC conv is also connected with fuel cell system.
Master cock K3 is connected with and for preventing current colector to the diode of fuel cell system conveying capacity between the input end of described fuel cell system and isolated DC/DC conv.
The control part of the isolated electric power system of described trackless trolley car comprises HCU, and HCU is by control bus connecting fuel battery system, the driving circuit of isolated DC/DC or control circuit.Described fuel cell system is connected with bus; Bus is connected with isolated DC/DC conv, high-voltage electric system; Described bus is also connected with whole-control system.
Pre-charge circuit is provided with between described current colector and described isolated DC/DC switch input; Described pre-charge circuit comprises two preliminary filling branch roads in parallel and flings branch road; Described preliminary filling branch road comprises and controls gauze and to power the master cock K1 of break-make, and K1 is in series with a resistor; The described branch road that directly fills comprises and controls gauze and to power the master cock K2 of break-make.Described pre-charge circuit connects current colector by counnter attack diode.
Isolated DC/DC conv, for ensureing the stable output power of the isolated electric power system of trackless trolley car, is between efficacious workaround all the time.
Super capacitor system can reclaim electric energy more than needed and the braking energy of fuel cell, provides momentary high power to power simultaneously.
When car load hanging net operation, fuel cell system as auxiliary energy, for ensure gauze power supply voltage stablize; When car load off-grid runs, fuel cell system as main energy sources, for for car load run electric energy is provided.
The isolated electric power system of trackless trolley car is divided into two kinds of mode of operations:
1, hanging net operation pattern
When car load hanging net operation, current collector contact gauze, from gauze power taking, gauze charges to super capacitor system as main power, drives car load to run, provides the average power needed for car load; Fuel cell system auxiliary power source.
When powering on, K1, K2 close successively, and K3 closes.Fuel cell system is as auxiliary energy work.Charged to super capacitor system by isolated DC/DC conv, High-Voltage Electrical Appliances system electrification completes.
During driving, gauze, as main power, to super capacitor system charging, drives car load to run.Meanwhile, super capacitor system can provide electric energy, to meet the instantaneous significant power demand of motor.
If gauze voltage stabilization is within nominal value 30% fluctuation range, now fuel cell system does not work.When super capacitor system voltage drop exports setting value V1 to isolated DC/DC conv nominal, gauze is charged to super capacitor system by isolated DC/DC conv, within guarantee super capacitor system voltage remains on setting range (V2-V3, wherein V2<V1<V3).When super capacitor system voltage is more than more than V3 value 20V, isolated DC/DC conv enters readiness for action, just reworks until super capacitor system voltage is down to when isolated DC/DC conv nominal exports setting value V1.
If gauze voltage fluctuation exceedes nominal value 30% or gauze voltage below level, fuel cell system work, as auxiliary power source, provide energy to isolated DC/DC conv, ensure that the stable output power of the isolated electric power system of trackless trolley car.
During braking, isolated DC/DC conv enters readiness for action, until after system enters driving condition, and the rearming of isolated DC/DC conv; Now, super capacitor system reclaims fuel braking energy.
2, off-grid operational mode
When car load off-grid runs, master cock K2 disconnects.Fuel cell system drives car load to run as main power, and isolated DC/DC conv obtains the energy from fuel cell, and when its mode of operation and car load hanging net operation, state is identical.
In the above-described embodiments, described closed-center system is super capacitor system, as other embodiments, can adopt electrokinetic cell system.
Further, in the isolated electric power system embodiment of trackless trolley car, described fuel cell system is connected with bus; Bus is connected with isolated DC/DC conv, high-voltage electric system; Described bus is also connected with whole-control system.Whole-control system is used for the cooperation control to whole electric power system: as controlled, gather the various electric parameters, control fuel cell system mode of operation etc. in electric power system to isolated DC/DC conv.This mode is identical with control of power supply system of the prior art, also can adopt the mode of other types.The solution of the present invention is the change of power configuration, and does not lie in control part.
Further, in the isolated electric power system embodiment of trackless trolley car, between described current colector and described isolated DC/DC switch input, be provided with pre-charge circuit; Described pre-charge circuit connects current colector by counnter attack diode.As other embodiments, this pre-charge circuit and counnter attack diode can not be used.
Further, in the isolated electric power system embodiment of trackless trolley car, described fuel cell system is connected isolated DC/DC input end by master cock K3 with diode.As other embodiments, this master cock K3 and counnter attack diode can not be used.
Trackless trolley car embodiment
Trackless trolley car belongs to double source trackless trolley car, and described double source refers to that this trackless trolley car has the electric power system of two propulsions source: gauze is powered with fuel cell-powered.Described concrete electric power system is identical with the isolated electric power system of trackless trolley car in above-mentioned trackless trolley car isolated electric power system embodiment, therefore not in this repeat specification.
Claims (10)
1. the isolated electric power system of trackless trolley car, it is characterized in that: comprise isolated DC/DC conv, isolated DC/DC switch input is for connecting current colector, mouth connects DC bus, DC bus is connected with closed-center system, DC bus is also for connecting high-voltage electric system, and the input end of described isolated DC/DC conv is also connected with fuel cell system.
2. the isolated electric power system of trackless trolley car according to claim 1, is characterized in that: described closed-center system is super capacitor system.
3. the isolated electric power system of trackless trolley car according to claim 1, is characterized in that: be connected with master cock K3 between the input end of described fuel cell system and isolated DC/DC conv and prevent current colector to the diode of fuel cell system conveying capacity.
4. the isolated electric power system of trackless trolley car according to claim 1, it is characterized in that: the control part of the isolated electric power system of described trackless trolley car comprises HCU, HCU is by control bus connecting fuel battery system, the driving circuit of isolated DC/DC or control circuit.
5. the isolated electric power system of trackless trolley car according to claim 1, is characterized in that: be provided with pre-charge circuit between described current colector and described isolated DC/DC switch input; Described pre-charge circuit connects current colector by counnter attack diode.
6. the isolated electric power system of trackless trolley car according to claim 5, is characterized in that: described pre-charge circuit comprises two preliminary filling branch roads in parallel and flings branch road; Described preliminary filling branch road comprises and controls gauze and to power the master cock K1 of break-make, and K1 is in series with a resistor; The described branch road that directly fills comprises and controls gauze and to power the master cock K2 of break-make.
7. a trackless trolley car, it is characterized in that: comprise the isolated electric power system of trackless trolley car, the isolated electric power system of described trackless trolley car comprises isolated DC/DC conv, isolated DC/DC switch input is for connecting current colector, mouth connects DC bus, DC bus is connected with closed-center system, and DC bus is also for connecting high-voltage electric system, and the input end of described isolated DC/DC conv is also connected with fuel cell system.
8. trackless trolley car according to claim 7, is characterized in that: described closed-center system is super capacitor system.
9. trackless trolley car according to claim 7, is characterized in that: be connected with master cock K3 between the input end of described fuel cell system and isolated DC/DC conv and prevent current colector to the diode of fuel cell system conveying capacity.
10. trackless trolley car according to claim 7, is characterized in that: be provided with pre-charge circuit between described current colector and described isolated DC/DC switch input; Described pre-charge circuit connects current colector by counnter attack diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510312238.2A CN104960428B (en) | 2015-06-09 | 2015-06-09 | Double source trolleybus and its isolated power supply system |
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| CN201510312238.2A CN104960428B (en) | 2015-06-09 | 2015-06-09 | Double source trolleybus and its isolated power supply system |
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| CN104960428A true CN104960428A (en) | 2015-10-07 |
| CN104960428B CN104960428B (en) | 2018-09-14 |
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| CN105391150A (en) * | 2015-12-04 | 2016-03-09 | 郑州宇通客车股份有限公司 | Trolleybus power supply system and power supply control method thereof |
| CN105383320A (en) * | 2015-12-08 | 2016-03-09 | 上海航天电源技术有限责任公司 | Alternative power supply system for electric vehicle battery management system and application method |
| CN110116639A (en) * | 2019-05-30 | 2019-08-13 | 江苏易飞特科技有限公司 | The method of supplying power to of rail vehicle based on super capacitor |
| CN110126634A (en) * | 2019-05-30 | 2019-08-16 | 江苏易飞特科技有限公司 | The method of supplying power to of rail vehicle |
| CN114175437A (en) * | 2019-07-29 | 2022-03-11 | 西门子交通有限公司 | Vehicle with current collector |
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| CN110116639A (en) * | 2019-05-30 | 2019-08-13 | 江苏易飞特科技有限公司 | The method of supplying power to of rail vehicle based on super capacitor |
| CN110126634A (en) * | 2019-05-30 | 2019-08-16 | 江苏易飞特科技有限公司 | The method of supplying power to of rail vehicle |
| CN114175437A (en) * | 2019-07-29 | 2022-03-11 | 西门子交通有限公司 | Vehicle with current collector |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co., Ltd Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Patentee before: Zhengzhou Yutong Bus Co., Ltd |
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