CN109733199A - A kind of high_voltage isolation system applied to tramcar energy storage device - Google Patents
A kind of high_voltage isolation system applied to tramcar energy storage device Download PDFInfo
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- CN109733199A CN109733199A CN201910045739.7A CN201910045739A CN109733199A CN 109733199 A CN109733199 A CN 109733199A CN 201910045739 A CN201910045739 A CN 201910045739A CN 109733199 A CN109733199 A CN 109733199A
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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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Abstract
The invention discloses a kind of high_voltage isolation systems applied to tramcar energy storage device, including two-way DC/DC converter and pre-charge circuit；The two-way DC/DC converter is placed on inside train, and one end is connected with high voltage bus, and the other end is connected by the pre-charge circuit with energy storage device；The pre-charge circuit is disconnected when train suspend mode is overhauled, and with the power circuit between cutoff high bus and energy storage device, high voltage bus is made to be in electroless state；The present invention, without carrying out discharge operation to train, can greatly shorten the time for operation of climbing to the top of a mountain, improve train overhaul operating efficiency before operation of climbing to the top of a mountain；And the waste for also avoiding remaining capacity in energy storage device reduces the setting quantity of train charge and discharge device in rolling stock section, reduces costs；Under the premise of guaranteeing service personnel's personal safety, train operation overhaul efficiency is significantly improved, operation cost is reduced, there is significant economic benefit.
Description
Technical field
The invention belongs to energy storage device power-off protection technical fields, are applied to tramcar more particularly, to one kind and store up
The high_voltage isolation system of energy device.
Background technique
Completely without the vehicle-mounted energy storage type tramcar of net due to not needing completely or only needing to set up in part way
A small amount of contact net, on urban landscape and limit for height almost without influence thus obtaining quick development in recent years.
Existing tramcar energy storage device is directly articulated on the high voltage dc bus of train, so as to cause the height of train
Pressure DC bus is in electriferous state always；Therefore current energy storage type tramcar is required to before stepping on roof operation to vehicle-mounted
Energy storage device carries out discharge operation, to guarantee operating personnel's safety of climbing to the top of a mountain.After the completion of roof operation, need to again to train into
Row charging is drawn using road rail vehicle, and train could move.Repair the journey system of repairing according to vehicle, tramcar generally have daily test,
Zhou Jian, monthly test, periodical repair, un-wheeling repair and overhaul total 6 are repaired journey, and part of daily test, whole monthly tests or more repair Cheng Junyou and step on vehicle
Push up job content, if therefore climb to the top of a mountain discharge operation is carried out to train before operation every time, the remaining capacity in energy storage device is complete
Portion's release, will cause the significant wastage of energy storage device electric energy, and also add the setting of train charge and discharge device in rolling stock section
Quantity；In addition, if climbing to the top of a mountain before and after operation every time carries out " electric discharge-charging " operation to train, strong influence working efficiency.
It climbs to the top of a mountain operating efficiency, cuts operating costs to improve, the operation that need to avoid climbing to the top of a mountain every time as far as possible fills train energy storage
The remaining capacity set discharges completely, therefore how train vehicle is reasonably solved under the premise of can guarantee service personnel's personal safety
The high_voltage isolation problem for carrying energy storage device is key technology urgently to be solved.
Summary of the invention
For at least one defect or Improvement requirement of the prior art, it is applied to tramcar the present invention provides one kind and stores up
The high_voltage isolation system of energy device, needs before and after operation of climbing to the top of a mountain to energy storage device its object is to solve existing tramcar
" electric discharge-charging " operation is carried out, causes the significant wastage of energy storage device electric energy, and increase train charge and discharge Denso in rolling stock section
The problem of setting quantity set, strong influence working efficiency.
To achieve the above object, according to one aspect of the present invention, it provides a kind of applied to tramcar energy storage device
High_voltage isolation system, including two-way DC/DC converter and pre-charge circuit；The two-way DC/DC converter is placed on train
Inside, one end are connected with high voltage bus, and the other end is connected by the pre-charge circuit with energy storage device；
The pre-charge circuit is disconnected when train suspend mode is overhauled, with the energization between cutoff high bus and energy storage device
Circuit makes high voltage bus be in electroless state.
Preferably, above-mentioned high_voltage isolation system, pre-charge circuit conducting when there is contact net section, two-way DC/DC become
Voltage needed for parallel operation obtains the high-voltage electricity of contact net offer and be converted into energy storage device by high voltage bus, to energy storage
Device charging.
Preferably, above-mentioned high_voltage isolation system, pre-charge circuit are connected in contactless barrier section, and two-way DC/DC becomes
The voltage that energy storage device exports is converted to the corresponding high voltage direct current of high voltage bus by parallel operation, to drive train driving.
Preferably, above-mentioned high_voltage isolation system, further includes the traction device being connected with high voltage bus, and the traction device exists
Have and the high voltage direct current of contact net offer is directly obtained to drive train driving by high voltage bus when contact net section；It is connect in nothing
When net-fault section, the voltage of energy storage device output is obtained to drive train driving by high voltage bus.
Preferably, above-mentioned high_voltage isolation system, traction device are also used to produce traction device itself in train braking
Raw AC rectification is direct current, and is charged by two-way DC/DC converter to energy storage device, realizes Brake energy recovery.
Preferably, above-mentioned high_voltage isolation system, traction device include traction invertor and traction electric machine；
One end of the traction invertor is connected with high voltage bus, and the other end is connected with traction electric machine；
Traction invertor is used to obtain the high voltage direct current on high voltage bus, is three-phase alternating current by high voltage direct current inversion
To drive traction electric machine.
Preferably, above-mentioned high_voltage isolation system, what traction invertor was also used to generate power generation when pulling motor braking
AC rectification is direct current.
Preferably, above-mentioned high_voltage isolation system, further includes braking resistor；One end of the braking resistor and energy storage device phase
Even, the other end is connected with traction invertor.
Preferably, above-mentioned high_voltage isolation system, pre-charge circuit are being set to two-way DC/DC converter and energy storage device just
Between extreme, including contactor K21 and limit in parallel with the contactor K11 after contactor K11, fuse F1, and series connection
Leakage resistance R11.
Preferably, above-mentioned high_voltage isolation system, is additionally provided with manual switch between pre-charge circuit and energy storage device.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
(1) the high_voltage isolation system provided by the invention applied to tramcar energy storage device, will be used for energy storage device
The two-way DC/DC converter of charge and discharge is arranged in train traction case, and energy storage device carries out charge and discharge by two-way DC/DC converter
Control, rather than directly hang on high voltage bus, solve the problems, such as that high voltage bus charges always；Pre-charge circuit is in train
Suspend mode disconnects when overhauling, and with the power circuit between cutoff high bus and energy storage device, high voltage bus is made to be in electroless state,
Therefore it can greatly shorten the time for operation of climbing to the top of a mountain without carrying out discharge operation to train before operation of climbing to the top of a mountain, improve
Train overhaul operating efficiency；And also avoid the waste of remaining capacity in energy storage device；It also reduces in rolling stock section and arranges simultaneously
The setting quantity of vehicle charge and discharge device, reduces costs；Under the premise of guaranteeing service personnel's personal safety, column are significantly improved
Vehicle runs overhaul efficiency, reduces operation cost, has significant economic benefit.
(2) the high_voltage isolation system provided by the invention applied to tramcar energy storage device, in contactless barrier section, vehicle
When accelerating, vehicle-mounted energy storage device exports energy, and two-way DC/DC converter is as boost chopper, by the voltage of super capacitor
It is increased to DC bus-bar voltage, traction power is provided；When vehicle deceleration and parking, two-way DC/DC converter is as buck chopper
Device charges to energy storage device after reducing busbar voltage；There is contact web area simultaneously, if super capacitor capacity is discontented, is passing through
Contact net it is sustainable for super capacitor charge, can very good solution greatly enhance ramp train climbing problem.
Detailed description of the invention
Fig. 1 is the logic diagram of the high_voltage isolation system provided by the invention applied to tramcar energy storage device；
Fig. 2 is the logic diagram of high_voltage isolation system provided in an embodiment of the present invention；
Fig. 3 is the circuit diagram of high_voltage isolation system provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Existing tramcar energy storage device is directly articulated on the high voltage dc bus of train, so as to cause the height of train
Pressure DC bus is in electriferous state always；Therefore it is required to carry out electric discharge behaviour to vehicle-mounted energy storage device before stepping on roof operation
Make, to guarantee operating personnel's safety of climbing to the top of a mountain；In order to realize under the premise of the electrification of the energy storage device of energy storage type tramcar, nothing
It need to can climb to the top of a mountain to energy storage device progress discharge operation and carry out roof upkeep operation, the present invention provides one kind to be applied to rail electricity
The high_voltage isolation system of vehicle energy storage device, as shown in Figure 1, the high_voltage isolation system includes two-way DC/DC converter and precharge
Circuit；The two-way DC/DC converter is placed in the towing tank of train, and one end is connected with high voltage bus, and the other end passes through pre-
Charging circuit is connected with energy storage device；
The pre-charge circuit is disconnected when train suspend mode is overhauled, and is returned with the energization between cutoff high bus and energy storage device
Road makes high voltage bus be in electroless state, and for tramcar in addition to energy storage device, other equipment are not charged；Therefore in inspection of climbing to the top of a mountain
It repairs operation not needing completely to give out light the remaining capacity of energy storage device, after the completion of upkeep operation, in train energy storage device still
It is to have electricity condition；To avoid the waste of train remaining capacity, drop while greatly improving train overhaul operating efficiency
Low running cost.
It is said below by structure and working principle of the specific embodiment to high_voltage isolation system provided by the invention
It is bright.
The present embodiment is carried out by taking 3 module tramcars as an example, and entire train sets 2 power trucks altogether, and each power turns
Set 2 axles altogether to frame, every axle sets 1 traction electric machine.Long steep grade linked network when driving, train can be directly by contact line
Draw electricity to high voltage dc bus, then passes through 2 tractions electricity of 2 traction invertors, two axles on same bogie respectively
Machine power supply.When no barrier section is by vehicle-mounted energy storage for power supply, super capacitor is supplied through two-way DC/DC converter to high voltage dc bus
Electricity, then powered respectively by traction invertor 1 to traction electric machine 1, it is powered by traction invertor 2 to traction electric machine 2.Such structure
Type can guarantee any group parts damage, and each bogie only loses 1/2 power, and totally 2 bogies only lose 1/4 to entire train
Power, it is ensured that the operation that train still can be reliable and stable in parts damages.Two-way DC/DC converter is keeping converter two
Hold DC voltage polarity it is constant in the case where, complete energy two-way transmission according to actual needs, can be greatly reduced system bulk,
Weight and cost.
Fig. 2 is the logic diagram of the high_voltage isolation system provided in this embodiment applied to tramcar energy storage device, such as
Shown in Fig. 2, pre-charge circuit conducting when there is contact net section in high_voltage isolation system, train is charged by contact net, is filled
The pantograph of train introduces DC750V direct current from contact line when electric, and two-way DC/DC converter is introduced after diode clamp；
Two-way DC/DC converter is used as buck chopper at this time, 750V direct current is reduced to 410 needed for storage capacitor~
550V direct current is charged by pre-charge circuit to super capacitor；Meanwhile when train pantograph is connected with contact line, train
Traction invertor can also directly be obtained from high voltage dc bus it is electric, by direct current 750V power inverter be three-phase alternating current after, driving
Traction electric machine operation realizes train with this and runs in charging；This operating condition can correspond to train and use in long steep grade section
Net suspension mode uses when current.
In contactless barrier section, train is driven by super capacitor energy-storage, and pre-charge circuit is connected at this time, two-way DC/
DC converter is used as boost chopper, by super capacitor export 500V direct current increase for high voltage dc bus it is corresponding
750V direct current, then passing through traction invertor inversion is three-phase alternating current, for driving train driving.
When train suspend mode maintenance, two-way DC/DC converter stops working and will not externally discharge, and pre-charge circuit disconnects,
With the power circuit between cutoff high bus and energy storage device, high voltage bus is made to be in electroless state, tramcar removes energy storage
Outside device, other equipment are not charged；Therefore it does not need completely to give out light the remaining capacity of energy storage device in upkeep operation of climbing to the top of a mountain,
It is still to have electricity condition in train energy storage device after the completion of upkeep operation；To greatly improve train overhaul operation effect
The waste that train remaining capacity is avoided while rate, reduces running cost.
When train is in damped condition, then traction invertor is used as two level rectifiers, and traction electric machine is as hair
Motor uses, and the alternating current that power generation generates when pulling motor braking will be rectified into direct current by traction invertor first, then lead to
It crosses two-way DC/DC converter to charge to super capacitor, realizes Brake energy recovery.
It further include braking resistor in high_voltage isolation system provided in this embodiment；One end of braking resistor and super capacitor phase
Even, the other end is connected with traction invertor；When train braking, traction electric machine switchs to generating operation mode by traction working condition；If at this time
Super capacitor not enough power supply, the then three-phase alternating current that traction electric machine issues pass through DC/ after traction invertor is rectified into direct current
DC converter charges to super capacitor；If the electricity of super capacitor is more sufficient at this time, when pulling motor braking issue three
Phase alternating current is converted to heat by braking resistor and is consumed, and avoids the abrasion of brake rigging.
Fig. 3 is the circuit diagram of high_voltage isolation system provided in this embodiment, as shown in figure 3, two-way DC/DC converter can be adopted
With modes such as two-way Cuk converter, bi-directional half bridge Buck/Boost converters, in the present embodiment, two-way DC/DC converter includes
Bi-directional half bridge circuit (being made of two IGBT power original parts, two diodes), voltage sensor VH11 based on IGBT module,
Current sensor LH14 and energy storage inductor R3, IGBT power original part upper tube is connected to high voltage bus, down tube is connected to negative wire.Work as column
Vehicle pantograph rises, and when being powered by DC750V contact net, then two-way DC/DC circuit takes electricity from traction main circuit, and IGBT power is former
Part is turned on/off by certain frequency, is charged after carrying out current limliting decompression to input DC750V direct current to super capacitor.At train
In No DC 750V contact net section, when being powered by super capacitor, opened by IGBT power original part down tube by certain frequency, to super
Grade capacitor output carries out boost chopper, provides stable DC750V direct current for traction main circuit and AuCT.
Pre-charge circuit includes contactor K11, K21, resistance R11, fuse F1 and manual switch, when circuit is just switched on,
It is closed K21, disconnects K11, electric current is limited by resistance R11, protect super capacitor in charging initial phase；After the completion of precharge,
It is closed K11, disconnects K21, normally charge to super capacitor.Fuse F1 is used for circuit overcurrent protection, and low current can be selected
Fuse；When train suspend mode maintenance, contactor K11 and K21 are simultaneously switched off, then pre-charge circuit disconnects, and has cut off high pressure mother
Power circuit between line and super capacitor makes high voltage bus be in electroless state.One as the present embodiment is preferred, preliminary filling
Manual switch is additionally provided between circuit and super capacitor, by the closure of the equally controllable pre-charge circuit of the manual switch or
It disconnects.
It is provided by the invention to be applied to have compared to the existing tramcar for needing just climb to the top of a mountain to energy storage device electric discharge
The high_voltage isolation system of rail electric car energy storage device can greatly improve train overhaul operating efficiency first；On the other hand, due to not
It needs to discharge to energy storage device, can greatly reduce the waste of train remaining capacity, reduce running cost；Simultaneously because
Operation of climbing to the top of a mountain does not need to carry out train discharge operation, and train is still electricity after the completion of upkeep operation, therefore in section
Charge and discharge device quantity can also be reduced accordingly；Under the premise of guaranteeing service personnel's personal safety, train operation is significantly improved
Overhaul efficiency reduces operation cost, has significant economic benefit.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of high_voltage isolation system applied to tramcar energy storage device, which is characterized in that including two-way DC/DC converter
And pre-charge circuit；The two-way DC/DC converter is placed on inside train, and one end is connected with high voltage bus, and the other end is logical
The pre-charge circuit is crossed to be connected with energy storage device；
The pre-charge circuit is disconnected when train suspend mode is overhauled, and is returned with the energization between cutoff high bus and energy storage device
Road makes high voltage bus be in electroless state.
2. high_voltage isolation system as described in claim 1, which is characterized in that the pre-charge circuit is when there is contact net section
Conducting, two-way DC/DC converter obtain the high-voltage electricity of contact net offer by high voltage bus and are converted into energy storage device institute
The voltage needed, to charge to energy storage device.
3. high_voltage isolation system as claimed in claim 1 or 2, which is characterized in that the pre-charge circuit is in contactless barrier
It being connected when section, the voltage that energy storage device exports is converted to the corresponding high voltage direct current of high voltage bus by two-way DC/DC converter, with
Drive train driving.
4. high_voltage isolation system as claimed in claim 3, which is characterized in that further include the traction dress being connected with high voltage bus
It sets, the traction device directly obtains the high voltage direct current of contact net offer by high voltage bus when there is contact net section to drive
Dynamic train driving；In contactless barrier section, the voltage of energy storage device output is obtained to drive train driving by high voltage bus.
5. high_voltage isolation system as claimed in claim 4, which is characterized in that the traction device is also used in train braking
The AC rectification that traction device itself is generated is direct current, and is charged by two-way DC/DC converter to energy storage device, real
Existing Brake energy recovery.
6. high_voltage isolation system as described in claim 4 or 5, which is characterized in that the traction device includes traction invertor
And traction electric machine；
One end of the traction invertor is connected with high voltage bus, and the other end is connected with traction electric machine；
Traction invertor is used to obtain the high voltage direct current on high voltage bus, is three-phase alternating current to drive by high voltage direct current inversion
Dynamic traction electric machine.
7. high_voltage isolation system as claimed in claim 6, which is characterized in that the traction invertor is also used to traction electric machine
The AC rectification that power generation generates when braking is direct current.
8. high_voltage isolation system as claimed in claim 6, which is characterized in that further include braking resistor；The braking resistor
One end is connected with energy storage device, and the other end is connected with traction invertor.
9. high_voltage isolation system as claimed in claim 1 or 8, which is characterized in that the pre-charge circuit is set to two-way DC/DC
Between converter and the positive terminal of energy storage device, including contactor K11, fuse F1, and after series connection with the contactor K11
Contactor K21 and current-limiting resistance R11 in parallel.
10. high_voltage isolation system as claimed in claim 9, which is characterized in that between the pre-charge circuit and energy storage device
It is additionally provided with manual switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045739.7A CN109733199B (en) | 2019-01-17 | 2019-01-17 | High-voltage isolation system applied to energy storage device of tramcar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045739.7A CN109733199B (en) | 2019-01-17 | 2019-01-17 | High-voltage isolation system applied to energy storage device of tramcar |
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| CN109733199A true CN109733199A (en) | 2019-05-10 |
| CN109733199B CN109733199B (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910045739.7A Active CN109733199B (en) | 2019-01-17 | 2019-01-17 | High-voltage isolation system applied to energy storage device of tramcar |
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| CN111532133A (en) * | 2019-08-20 | 2020-08-14 | 长城汽车股份有限公司 | Automobile direct-current bus pre-charging method and equipment |
| CN114435149A (en) * | 2022-03-07 | 2022-05-06 | 中车青岛四方机车车辆股份有限公司 | Power supply control system and method for railway vehicle and railway vehicle |
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| CN109733199B (en) | 2020-02-18 |
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