CN106671782B - A kind of AC electric locomotive trailer system - Google Patents
A kind of AC electric locomotive trailer system Download PDFInfo
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- CN106671782B CN106671782B CN201510755737.9A CN201510755737A CN106671782B CN 106671782 B CN106671782 B CN 106671782B CN 201510755737 A CN201510755737 A CN 201510755737A CN 106671782 B CN106671782 B CN 106671782B
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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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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention is a kind of AC electric locomotive trailer system, the system comprises: transformer, four-quadrant rectifier, traction invertor and traction electric machine, and earthing detection element is set between the four-quadrant rectifier and the traction invertor, the ground terminal of the earthing detection element is connected to the ground, further include: contactor, the contactor is arranged on the ground terminal of the earthing detection element, the contactor is used to disconnect the ground terminal of the earthing detection element and ground when ground fault occurs for the earthing detection element testing to the trailer system, AC electric locomotive trailer system provided by the invention, current transformer when solving trailer system generation ground fault in the prior art in system is out of service and leads to the under powered technical problem of entire locomotive.
Description
Technical field
The present invention relates to a kind of electric locomotive traction system, in particular to it is a kind of can be to the exchange that ground fault is handled
Electric locomotive traction system.
Background technique
Syntonic type (HXD) electric locomotive has become the important vehicle in China Railway at present, more and more holds
Carry on a shoulder pole the task of the passenger and freight of country, wherein trailer system is the important component of entire electric locomotive.
The circuit structure of trailer system is as shown in Figure 1, trailer system mainly includes tractive transformer T, four-quadrant rectifier
401, traction invertor 403 and traction electric machine 404 form, and tractive transformer T is connected by pantograph 20 with contact net 10,
In, earthing detection circuit 402 is set in the intermediate loop of main circuit, and wherein earthing detection circuit 402 includes input terminal, output end
And ground terminal, wherein input terminal and output end respectively with the input terminal of the tractive transformer T and traction invertor 403 and defeated
Outlet is connected, and ground terminal is connected to the ground, earthing detection circuit 402 can for circuit as shown in Figure 1 (two capacitor C1 and
C2, resistance R connect composition with current sensor TA), it can also be circuit as shown in Figure 2 (two resistance R1 and R2, capacitor C
Connected with voltage sensor TV), judge whether system connects by curent change that current sensor TA is detected in Fig. 1
Earth fault judges whether system occurs ground fault by voltage change that voltage sensor TV is detected in Fig. 2.
Currently, trailer system according in earthing detection circuit 40 current sensor TA or voltage sensor TV detect and be
When ground fault occurring in system, in order to be protected to entire circuit and current transformer, main circuit breaker 31 and transformer T and four-quadrant
Switch 32 between limit rectifier 401 disconnects, and then main circuit breaker 31 is closed, between transformer T and four-quadrant rectifier 401
Switch 32 still in off-state, in this way, the trailer system that ground fault does not occur in entire locomotive operates normally, and occur
Entire current transformer in the trailer system of ground fault is removed, and trailer system is out of service.
However after trailer system a certain in entire locomotive is out of service because of generation ground fault, the power drop of entire locomotive
Low, locomotive entire in this way is in downrating state, and the vehicle tractive force of locomotive reduces, and when locomotive load-carrying is larger, having can
Machine can be caused broken or face the accident of repairing, to greatly influence the normal operation of locomotive.
Summary of the invention
The present invention provides a kind of AC electric locomotive trailer system, solves trailer system in the prior art and ground connection event occurs
Current transformer when barrier in system is out of service and leads to the under powered technical problem of entire locomotive.
The present invention provides a kind of AC electric locomotive trailer system, including what is be sequentially connected: transformer, four-quadrant rectification
Device, traction invertor and traction electric machine, and earthing detection member is set between the four-quadrant rectifier and the traction invertor
The ground terminal of part, the earthing detection element is connected to the ground, further includes:
Contactor, the contactor are arranged on the ground terminal of the earthing detection element, and the contactor is used in institute
It states the ground terminal of the earthing detection element and ground when to the trailer system ground fault occurs for earthing detection element testing
It disconnects.
In a specific embodiment of the invention, the earthing detection element includes: the first earth element, the second earth element
And detection piece, wherein first earth element is connected with the four-quadrant rectifier and the traction invertor respectively, described
Second earth element is connected with first earth element, and second earth element and the detection piece serial or parallel connection connect
It connects, the detection piece is connected with the contactor.
In a specific embodiment of the invention, first earth element includes first capacitor and the second capacitor, and described
The input terminal of one capacitor is connected with one end of the four-quadrant rectifier and the traction invertor respectively, the first capacitor
Output end is connected with the input terminal of the input terminal of second capacitor and the second earth element, the output end of second capacitor
Be connected respectively with the other end of the four-quadrant rectifier and the traction invertor, the output end of second earth element with
The input terminal of the detection piece is connected, and the output end of the detection piece is connected with the contactor.
In a specific embodiment of the invention, second earth element is resistive element, and the detection piece is electric current biography
Sensor.
In a specific embodiment of the invention, first earth element includes first resistor and second resistance, and described
The input terminal of one resistance is connected with one end of the four-quadrant rectifier and the traction invertor, the output of the first resistor
End respectively with the input terminal of the second resistance, the input terminal of second earth element, the input terminal of the detection piece and institute
The input terminal for stating contactor is connected, the output end of the second resistance, the output end of second earth element, the detection piece
Output end be connected with the other end of the four-quadrant rectifier and the traction invertor, the output end of the contactor with
Ground is connected.
In a specific embodiment of the invention, second earth element is capacitor, and the detection piece is voltage sensor.
A kind of AC electric locomotive trailer system provided by the invention is connect by the ground terminal setting in earthing detection element
Tentaculum, when ground fault occurs for system, by the disconnection of contactor so that the ground terminal and ground of earthing detection element disconnect, i.e.,
The ground terminal of earthing detection element is unearthed, only has earth fault to be grounded in trailer system entire in this way, i.e. a grounding point,
Trailer system entire in this way is not in circuit, will not be damaged to the current transformer in system in this way, therefore, in trailer system
Current transformer keep working normally, to will not be impacted to the normal operation of entire locomotive, therefore, friendship provided by the invention
Electric locomotive traction system is flowed, the purpose that current transformer operates normally when ground fault occurs for trailer system is realized, to solve
Current transformer when trailer system generation ground fault in the prior art of having determined in system is out of service and leads to the function of entire locomotive
The technical issues of rate reduces.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of trailer system in the prior art；
Fig. 2 is the another circuit diagram for drawing earthing detection circuit in auxiliary system in the prior art；
Fig. 3 is the structural schematic diagram that AC electric locomotive trailer system of the present invention implements one；
Fig. 4 is the structural schematic diagram of AC electric locomotive trailer system embodiment two of the present invention；
Fig. 5 is the another structural schematic diagram of AC electric locomotive trailer system embodiment two of the present invention；
Fig. 6 is the structural schematic diagram of AC electric locomotive trailer system embodiment three of the present invention；
Fig. 7 is the another structural schematic diagram of AC electric locomotive trailer system embodiment three of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 3 is the structural schematic diagram that AC electric locomotive trailer system of the present invention implements one, as shown in figure 3, AC power
Locomotive traction system includes: transformer T, four-quadrant rectifier 501, traction invertor 503 and traction electric machine 504, and transformer T is logical
It crosses pantograph 20 to be connected with contact net 10, and main circuit breaker 31, transformation is set on the circuit between pantograph 20 and transformer T
Switch 32 is set between device T and four-quadrant rectifier 501, ground connection is set between four-quadrant rectifier 501 and traction invertor 503
Detecting element 502, whether earthing detection element 502 is for occurring ground fault in detection system.
Wherein, the input terminal A1 of earthing detection element 502 respectively with four-quadrant rectifier 501 and traction invertor 503
One end is connected, and is specially connected with the input terminal of the output end of four-quadrant rectifier 501 and traction invertor 503；Earthing detection
The output terminals A 2 of element 502 is connected with the other end of four-quadrant rectifier 501 and traction invertor 503 respectively, specially with four
Another output end of quadrant rectifier 501 and an output end (another output end of traction invertor 503 of traction invertor 503
It is connected with traction electric machine 504) it is connected；The ground terminal A3 of earthing detection element 502 is connected to the ground, i.e. earthing detection element 502
Ground terminal A3 ground connection.
It further include contactor KM in the present embodiment, contactor KM is arranged on the ground terminal A3 of earthing detection element 502,
Contactor KM is used for earthing detection element 502 when earthing detection element 502 detects that ground fault occurs for trailer system
Ground terminal A3 and ground disconnect, i.e., make the ground terminal A3 of earthing detection element 502 unearthed by contactor KM, the present embodiment
In, when since ground fault occurs, the ground terminal A3 of earthing detection element 502 is earth-free, is only grounded in such system
Location of fault is grounded, and is equivalent to only one grounding point in such whole system, and the system when there is a grounding point
It will not constitute to current transformer (including four-quadrant rectifier 501 and traction invertor 503) hurtful circuit, in this way, even if
Ground fault occurs for trailer system, and trailer system will not be out of service, and current transformer can work normally.
Trailer system concrete operating principle provided in this embodiment are as follows: earthing detection element 502 passes through detection electric current or electricity
Pressure judges whether system occurs ground fault, when the current or voltage that basis detects judges that ground fault does not occur for system
When, contactor KM is in closed state, i.e. ground terminal A3 is grounded, when ground fault occurs for the system that detects, main circuit breaker 31
It being disconnected with switch 32, ground fault has occurred in prompt system on the display screen of system, meanwhile, contactor KM is disconnected, that is, is grounded
It holds A3 earth-free, then, since contactor KM is disconnected, two grounding points is not present in such system, it will not structure in system
Pairs of current transformer or circuit cause the circuit broken (and in the prior art, when since ground fault occurs, to connect in system
Earth fault point and ground terminal A3 grounding point, i.e. two grounding points, two such grounding point, which will form, causes current transformer and circuit
The circuit of damage), therefore, operator is closed main circuit breaker 31 again manually, the automatic closure of switch 32, in this way, current transformer can be with
It works on, trailer system normally plays tractive force, accordingly even when ground fault occurs in the process of running for locomotive, is grounded
The trailer system of failure will not be out of service, and current transformer will not be cut out in system, and locomotive entire in this way is in the process of running
Power will not reduce, and locomotive can keep normal operating status, check after locomotive Hui Ku corresponding grounding point, eliminate
The ground connection point failure of system, wherein main circuit breaker 31 and switch 32 first disconnect, and it is aobvious in order to allow operator to pass through for then reclosing
The operating condition of display screen timely learning system, wherein in the present embodiment, when ground fault occurs, main circuit breaker 31 and switch 32
Contactor KM can be only needed to disconnect in system without disconnecting then the step of being closed.
A kind of AC electric locomotive trailer system provided in this embodiment passes through the ground terminal setting in earthing detection element
Contactor, when ground fault occurs for system, by the disconnection of contactor so that the ground terminal of earthing detection element and ground disconnect,
That is the ground terminal of earthing detection element is unearthed, there was only earth fault ground connection, i.e., one ground connection in trailer system entire in this way
Point, trailer system entire in this way is not in circuit, will not be damaged to the current transformer in system in this way, therefore, traction system
Current transformer in system keeps working normally, to will not impact to the normal operation of entire locomotive, therefore, the present invention is provided
AC electric locomotive trailer system, realize trailer system occur ground fault when current transformer operate normally purpose, from
And it is out of service and lead to entire locomotive to solve current transformer when ground fault occurs for trailer system in the prior art in system
Under powered technical problem.
Embodiment two
Fig. 4 is the structural schematic diagram of AC electric locomotive trailer system embodiment two of the present invention, in the base of above-described embodiment
On plinth, in the present embodiment, as shown in figure 4, earthing detection element 502 includes: the first earth element 5021, the second earth element
5022 and detection piece 5023, wherein the first earth element 5021 respectively with 503 phase of four-quadrant rectifier 501 and traction invertor
Even, specifically, the input terminal (i.e. the input terminal A1 of earthing detection element 502) and four-quadrant rectifier of the first earth element 5021
501 output end and the input terminal of traction invertor 503 are connected, correspondingly, the output end of the first earth element 5021 (is grounded
The output terminals A 2 of detecting element 502) and another output end of four-quadrant rectifier 501 and an output end of traction invertor 503
It is connected, the input terminal of the second earth element 5022 is connected with the first earth element 5021, the output end of the second earth element 5022
Be connected with the input terminal of detection piece 5023, the output end (i.e. the ground terminal A3 of earthing detection element 502) of detection piece 5023 with connect
Tentaculum KM is connected, and contactor KM is connected to the ground, and in the present embodiment, the second earth element 5022 is connected in series with detection piece 5023,
In the present embodiment, whether detection piece 5023 is sent out for the current value in detection system according to the current value decision-making system detected
Raw ground fault, wherein in the present embodiment, the first earth element 5021 can be capacitor, and the second earth element 5022 can electricity
Resistance, detection piece 5023 can be current detecting part.
Further, Fig. 5 is the another structural schematic diagram of AC electric locomotive trailer system embodiment two of the present invention, this reality
It applies in example, as shown in figure 5, the first earth element 5021 includes first capacitor C1 and the second capacitor C2, the second earth element 5022
For resistive element R, detection piece 5023 is current sensor TA.
Wherein, the input terminal (i.e. the input terminal A1 of earthing detection element 502) of first capacitor C1 is rectified with four-quadrant respectively
One end of device 501 and traction invertor 503 be connected (specially with the output end and traction invertor of four-quadrant rectifier 501
503 input terminal is connected), the output end of first capacitor C1 is defeated with the input terminal of the second capacitor C2 and resistive element R respectively
Enter end to be connected, the output end of the second capacitor C2 is connected with the other end of four-quadrant rectifier 501 and traction invertor 503 respectively
(being specially connected with an output end of another output end of four-quadrant rectifier 501 and traction invertor 503), resistive element R
Output end be connected with the input terminal of current sensor TA, (i.e. earthing detection element 502 connects for the output end of current sensor TA
Ground terminal A3) it is connected with the input terminal of contactor KM, the output end of contactor KM is grounded, and in the present embodiment, passes through current sensor
The variation for the System current that TA is detected judges whether system occurs ground fault, wherein when ground fault does not occur for system,
Contactor KM closure, ground terminal A3 ground connection, when ground fault occurs, contactor KM is disconnected, and ground terminal A3 is earth-free.
Embodiment three
Fig. 6 is the structural schematic diagram of AC electric locomotive trailer system embodiment three of the present invention, in the base of above-described embodiment
On plinth, as shown in fig. 6, being with the difference of embodiment two, in the present embodiment, the second earth element 5022 is in parallel with detection piece 5023
Connection, and the input terminal of the input terminal of the first earth element 5022, the input terminal of detection piece 5023 and contactor KM is with first
Earth element 5021 is connected, the output end of the first earth element 5022 and the output end of detection piece 5023 and the first earth element
5021 output end (i.e. the output terminals A 2 of earthing detection element 502) is connected, the output end ground connection of contactor KM.In the present embodiment
In, the first earth element 5021 is the element being composed in series by two resistance, and the second earth element 5022 can be capacitor, detection
Part 5023 can be voltage detecting part.
Further, Fig. 7 is the another structural schematic diagram of AC electric locomotive trailer system embodiment three of the present invention, this reality
It applies in example, as shown in fig. 7, the first earth element 5021 includes first resistor R1 and second resistance R2, the second earth element 5022
For capacitor C, detection piece 5023 is voltage sensor TV.
Wherein, the input terminal (i.e. the input terminal A1 of earthing detection element 5021) and four-quadrant rectifier of first resistor R1
501 are connected with one end of traction invertor 503, as shown in fig. 7, be specially with an output end of four-quadrant rectifier 501 and
The input terminal of traction invertor 503 is connected, the output end of first resistor R1 respectively with the input terminal of second resistance R2, capacitor C
The input terminal of input terminal, the input terminal of voltage sensor TV and contactor KM is connected, the output end of second resistance R2, capacitor C
The output end of output end and voltage sensor TV are connected with the other end of four-quadrant rectifier 501 and traction invertor 503, connect
The output end of tentaculum KM is connected to the ground, and in embodiment, capacitor C and voltage sensor TV are connected in parallel.In the present embodiment, voltage
Sensor TV is for the ground voltage in detection system, when the ground voltage detected changes, then judges that system is sent out
Raw ground fault, contactor KM are disconnected, and ground terminal A3 is earth-free, and the current transformer in system keeps operating normally.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (6)
1. a kind of AC electric locomotive trailer system, including what is be sequentially connected: transformer, four-quadrant rectifier, traction invertor
And traction electric machine, and earthing detection element is set between the four-quadrant rectifier and the traction invertor, the ground connection inspection
The ground terminal for surveying element is connected to the ground, which is characterized in that further include:
Contactor, the contactor are arranged on the ground terminal of the earthing detection element, and the contactor described for connecing
Ground detecting element detects and disconnects the ground terminal of the earthing detection element and ground when ground fault occurs for the trailer system.
2. AC electric locomotive trailer system according to claim 1, which is characterized in that the earthing detection element packet
It includes: the first earth element, the second earth element and detection piece, wherein first earth element is whole with the four-quadrant respectively
Stream device is connected with the traction invertor, and second earth element is connected with first earth element, and described second connects
Ground element and the detection piece are connected in series or in parallel, and the detection piece is connected with the contactor.
3. AC electric locomotive trailer system according to claim 2, which is characterized in that first earth element includes
First capacitor and the second capacitor, the input terminal of the first capacitor respectively with the four-quadrant rectifier and the traction invertor
One end be connected, the output end of the first capacitor and the input terminal of second capacitor and the input terminal of the second earth element
It is connected, the output end of second capacitor is connected with the other end of the four-quadrant rectifier and the traction invertor respectively,
The output end of second earth element is connected with the input terminal of the detection piece, and the output end of the detection piece is contacted with described
Device is connected.
4. AC electric locomotive trailer system according to claim 3, which is characterized in that second earth element is electricity
Resistance element, the detection piece are current sensor.
5. AC electric locomotive trailer system according to claim 2, which is characterized in that first earth element includes
The one of first resistor and second resistance, the input terminal of the first resistor and the four-quadrant rectifier and the traction invertor
End is connected, the input with the input terminal of the second resistance, second earth element respectively of the output end of the first resistor
The input terminal at end, the input terminal of the detection piece and the contactor is connected, and the output end of the second resistance, described second connect
The other end of the output end with the four-quadrant rectifier and the traction invertor of the output end of ground element, the detection piece
It is connected, the output end of the contactor is connected to the ground.
6. AC electric locomotive trailer system according to claim 5, which is characterized in that second earth element is electricity
Hold, the detection piece is voltage sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510755737.9A CN106671782B (en) | 2015-11-09 | 2015-11-09 | A kind of AC electric locomotive trailer system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755737.9A CN106671782B (en) | 2015-11-09 | 2015-11-09 | A kind of AC electric locomotive trailer system |
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| CN106671782A CN106671782A (en) | 2017-05-17 |
| CN106671782B true CN106671782B (en) | 2019-06-21 |
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| CN201510755737.9A Active CN106671782B (en) | 2015-11-09 | 2015-11-09 | A kind of AC electric locomotive trailer system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109557413B (en) * | 2017-09-26 | 2021-06-22 | 株洲中车时代电气股份有限公司 | Method and device for positioning grounding point of main loop of locomotive |
| CN110780224A (en) * | 2018-07-11 | 2020-02-11 | 西门子股份公司 | Ground fault detection circuit and device |
| CN110504660A (en) * | 2019-07-30 | 2019-11-26 | 西安中车永电电气有限公司 | A kind of trailer system and its grounding method of traction convertor |
| CN110949449B (en) * | 2019-12-20 | 2020-09-04 | 亚太空列(河南)轨道交通有限公司 | Rail transit vehicle-mounted state detection method and device and electronic equipment |
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| CN106671782A (en) | 2017-05-17 |
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