CN110504660A - A kind of trailer system and its grounding method of traction convertor - Google Patents
A kind of trailer system and its grounding method of traction convertor Download PDFInfo
- Publication number
- CN110504660A CN110504660A CN201910692887.8A CN201910692887A CN110504660A CN 110504660 A CN110504660 A CN 110504660A CN 201910692887 A CN201910692887 A CN 201910692887A CN 110504660 A CN110504660 A CN 110504660A
- Authority
- CN
- China
- Prior art keywords
- resistance
- component
- traction
- trailer system
- power module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A kind of trailer system of traction convertor, including traction four-quadrant power module, the resistance R being connect with tractive transformer1Component, resistance R2Component, voltage sensor TV1, grounding point PGND, intermediate loop equipment, inverter assembly and load；Traction four-quadrant power module connect to form the first circuit with inverter assembly；Traction four-quadrant power module connect to form second servo loop with intermediate loop equipment；Four-quadrant power module is drawn through resistance R1Component and resistance R2Component series connection partial pressure forms tertiary circuit；Voltage sensor TV1It is connected in parallel on resistance R2Both ends, resistance R1Component and resistance R2Contactor KC is set between component and grounding point PGND1Ground fault is judged by electric resistance partial pressure detection; fast response time, accuracy rate is high, is conducive to the protection of equipment; when trailer system is grounded; trailer system does not have to that relevant sub- equipment is isolated, and can maintain to run, improve the serious forgiveness of vehicle; the probability that vehicle delay is broken with machine is reduced, it is horizontal to improve using for vehicle.
Description
Technical field
The invention belongs to the trailer system of rail traffic traction technique field more particularly to a kind of traction convertor and its connect
Ground processing method.
Background technique
Largely using single-phase 25KV, 50Hz power supply mechanism in the railway system in China, by contact net to machine
Vehicle power supply, through rail return current, due to 25KV overtension, and it is only single-phase be not used to motor control, so on locomotive
A fairing is had, since the fairing is single-phase and is able to carry out energy feedback, the device is referred to as single
Phase four-quadrant rectifier.
Single-phase 25KV, 50Hz high-voltage electricity can obtain one surely using the control of single-phase four-quadrant rectifier by transformer
This stable medium voltage is reverse into the exchange respectively needed again by fixed DC voltage, traction invertor or subordinate inverter
Voltage and frequency, to control corresponding motor or three-phase equipment.
As shown in Figure 1, transformer secondary side alternating voltage is converted stable direct current by traction voltage transformation output traction four-quadrant
Voltage, steady dc voltage convert steady dc voltage through inverter control traction electric machine or by subordinate inverter
Threephase load is supplied for voltage magnitude and the controllable three-phase alternating current of frequency.
In Fig. 1, traction four-quadrant is that one group of four-quadrant either two groups of four-quadrants are in parallel.
In Fig. 1, inverter is that one group of traction invertor or two groups of inverter parallels or three groups of inverter parallels are additional
One group of subordinate inverter is parallel to intermediate loop simultaneously.
In Fig. 1, the resistance R of intermediate loop ground connection1、R2Only illustrate, R1、R2Either multiple resistance are connected and are existed
PGND point in one fixed ground connection point diagram.
When trailer system is grounded, grounding point constitutes circuit by the PNGD point in casing and Fig. 1, at this time traction system
System detects ground fault, and the traction four-quadrant, traction invertor, subordinate inverter of ground connection can be isolated.
It will lead to traction four-quadrant or traction invertor or subordinate inverter when ground fault occurs for trailer system
It is isolated, is lost so as to cause the partial function of traction convertor, influence the performance of entire locomotive or EMU function.
Summary of the invention
The purpose of the present invention is to provide a kind of trailer system of traction convertor and its grounding method, solve existing
It will lead to traction four-quadrant or traction invertor when having trailer system generation ground fault or subordinate inverter be isolated, from
And the partial function of traction convertor is caused to lose, influence the operation efficiency of entire locomotive or EMU function.
The purpose of the present invention is achieved through the following technical solutions:
A kind of trailer system of traction convertor, including traction four-quadrant power module, the electricity being connect with tractive transformer
Hinder R1Component, resistance R2Component, voltage sensor TV1, grounding point PGND, intermediate loop equipment, inverter assembly and load；
The traction four-quadrant power module connect to form the first circuit with inverter assembly；
The traction four-quadrant power module connect to form second servo loop with intermediate loop equipment；
The traction four-quadrant power module is through resistance R1Component and resistance R2Component series connection partial pressure forms tertiary circuit；
The voltage sensor TV1It is connected in parallel on resistance R2Both ends, the resistance R1Component and resistance R2Component and grounding point
Contactor KC is set between PGND1。
Further, the contactor KC1 is A.C. contactor.
Further, a kind of grounding method of traction convertor, the described grounding method specifically includes following step
It is rapid:
A contactor KC1 is connected between grounding point PGND point and resistance R1 component and resistance R2 component；
Voltage sensor TV1 detects that ground resistance R2 component both end voltage is abnormal, is more than resistance R2 component voltage wave
When dynamic threshold value, judge that ground fault occurs for system；Otherwise, which operates normally；
After determining that ground fault occurs for the trailer system, which will be switched off contactor KC1, so that trailer system
Circuit between actual grounding point and grounding point PGND is in an off state, and the trailer system is grounded but can not at this time
Circuit is constituted, not constituting traction four-quadrant power module or inverter assembly of the circuit then in the trailer system will not be every
From.
Further, contactor KC1 is in closed state, guarantees that trailer system has when the trailer system operates normally
One grounding point Earth Fault Detection.
Further, abort situation and grounding point PGND pass through cabinet body or vehicle when ground fault occurs for the trailer system
Body is connected to form fault loop, which is lower than the impedance of ground resistance R1 component and resistance R2 component, causes to connect
Ground resistance R1 is short-circuited, and ground resistance R2 will bear whole busbar voltages.
Compared with prior art, the invention has the advantages that:
1. judging ground fault by electric resistance partial pressure detection, fast response time, accuracy rate is high, is conducive to the protection of equipment；
2. trailer system does not have to that relevant sub- equipment is isolated, and can maintain to run when trailer system is grounded, improve
The serious forgiveness of vehicle reduces the probability that vehicle is delayed or machine is broken, and it is horizontal to improve using for vehicle；
3. passing through contactor KC1It can be automatically controled earth-return circuit switching, switch disconnects earth-return circuit without human intervention, has
Conducive to the personal safety for ensureing operator.
Detailed description of the invention
Fig. 1 is prior art trailer system earthing detection schematic diagram of the invention；
Fig. 2 is trailer system grounding schematic diagram of the invention；
Fig. 3 is trailer system ground fault schematic diagram of the invention.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
Referring to fig. 2, a kind of trailer system of traction convertor, including the traction four-quadrant power being connect with tractive transformer
Module, resistance R1Component, resistance R2Component, voltage sensor TV1, grounding point PGND, intermediate loop equipment, inverter assembly with
And load.
Traction four-quadrant power module connect to form the first circuit with inverter assembly.
Traction four-quadrant power module connect to form second servo loop with intermediate loop equipment.
Four-quadrant power module is drawn through resistance R1Component and resistance R2Component series connection partial pressure forms tertiary circuit.
Voltage sensor TV1It is connected in parallel on resistance R2Both ends, which is characterized in that the resistance R1Component and resistance R2Component with
Contactor KC is set between grounding point PGND1。
Contactor KC1For A.C. contactor,
Referring to Fig. 3, a kind of grounding method of traction convertor, in grounding point PGND point and resistance R1Component and resistance
R2A contactor KC is connected between component1。
When the trailer system operates normally, contactor KC1In closed state, guarantee that trailer system has a ground connection
Point Earth Fault Detection.
When ground fault occurs for the trailer system, shape is connected by cabinet body or car body with grounding point PGND in abort situation
At fault loop, which is lower than ground resistance R1Component and resistance R2The impedance of component leads to ground resistance R1Quilt
Short circuit, ground resistance R2It will bear whole busbar voltages.
At this point, voltage sensor TV1Detect ground resistance R2Component both end voltage is abnormal, is more than resistance R2Component electricity
When pressing the threshold value of fluctuation, judge that ground fault occurs for system.
After determining that ground fault occurs for the trailer system, which will be switched off contactor KC1, so that trailer system
Circuit between actual grounding point and grounding point PGND is in an off state, and the trailer system is grounded but can not at this time
Circuit is constituted, not constituting traction four-quadrant power module or inverter assembly of the circuit then in the trailer system will not be every
From.
Ground fault is judged by electric resistance partial pressure detection in through this embodiment, fast response time, accuracy rate is high, is conducive to
The protection of equipment.
When trailer system is grounded, trailer system does not have to that relevant sub- equipment is isolated, and can maintain to run, and improves vehicle
Serious forgiveness, reduce vehicle delay and probability that machine is broken, improve vehicle with horizontal.
It can be automatically controled earth-return circuit switching by contactor, switch disconnects earth-return circuit without human intervention, is conducive to
Ensure the personal safety of operator.
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that including the article of a series of elements or equipment not only includes those elements, but also including not having
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited in the case where more limiting by sentence "including a ...", it is not excluded that in the mistake including the element
There is also other identical elements in journey, method, article or equipment.
The above is only the specific embodiment of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
It should be understood that the application is not limited to the content being described above, and its model can not departed from
It encloses and carry out various modifications and change.Scope of the present application is only limited by the accompanying claims.
Claims (5)
1. a kind of trailer system of traction convertor, including traction four-quadrant power module, the resistance R being connect with tractive transformer1
Component, resistance R2Component, voltage sensor TV1, grounding point PGND, intermediate loop equipment, inverter assembly and load；
The traction four-quadrant power module connect to form the first circuit with inverter assembly；
The traction four-quadrant power module connect to form second servo loop with intermediate loop equipment；
The traction four-quadrant power module is through resistance R1Component and resistance R2Component series connection partial pressure forms tertiary circuit；
The voltage sensor TV1It is connected in parallel on resistance R2Both ends, which is characterized in that the resistance R1Component and resistance R2Component with connect
Contactor KC is set between the PGND of place1。
2. a kind of trailer system of traction convertor according to claim 1, which is characterized in that the contactor KC1To hand over
Flow contactor.
3. based on a kind of grounding method of traction convertor described in claim 1, which is characterized in that at the described ground connection
Reason method specifically includes the following steps:
In grounding point PGND point and resistance R1Component and resistance R2A contactor KC is connected between component1；
Voltage sensor TV1Detect ground resistance R2Component both end voltage is abnormal, is more than resistance R2The threshold of component voltage fluctuation
When value, judge that ground fault occurs for system；Otherwise, which operates normally；
After determining that ground fault occurs for the trailer system, which will be switched off contactor KC1, so that trailer system is practical
Grounding point and grounding point PGND between circuit be in an off state, the trailer system is grounded but can not be constituted at this time
Circuit, not constituting traction four-quadrant power module or inverter assembly of the circuit then in the trailer system will not be isolated.
4. a kind of grounding method of traction convertor according to claim 3, which is characterized in that when the trailer system
When normal operation, contactor KC1In closed state, guarantee that trailer system has a grounding point Earth Fault Detection.
5. a kind of grounding method of traction convertor according to claim 3, which is characterized in that trailer system hair
When raw ground fault, abort situation is connected to form fault loop with grounding point PGND by cabinet body or car body, the fault loop
Impedance is lower than ground resistance R1Component and resistance R2The impedance of component leads to ground resistance R1It is short-circuited, ground resistance R2It will bear
Whole busbar voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692887.8A CN110504660A (en) | 2019-07-30 | 2019-07-30 | A kind of trailer system and its grounding method of traction convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692887.8A CN110504660A (en) | 2019-07-30 | 2019-07-30 | A kind of trailer system and its grounding method of traction convertor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110504660A true CN110504660A (en) | 2019-11-26 |
Family
ID=68587639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910692887.8A Pending CN110504660A (en) | 2019-07-30 | 2019-07-30 | A kind of trailer system and its grounding method of traction convertor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110504660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731192A (en) * | 2020-12-14 | 2021-04-30 | 中车永济电机有限公司 | Protection method and test verification method for active power of locomotive traction converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836511A (en) * | 2015-02-17 | 2015-08-12 | 中国铁道科学研究院 | Traction inverter main circuit |
| CN205202752U (en) * | 2015-11-09 | 2016-05-04 | 中车大连电力牵引研发中心有限公司 | AC electric locomotive traction system |
| CN106671782A (en) * | 2015-11-09 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Alternating current electric locomotive traction system |
-
2019
- 2019-07-30 CN CN201910692887.8A patent/CN110504660A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836511A (en) * | 2015-02-17 | 2015-08-12 | 中国铁道科学研究院 | Traction inverter main circuit |
| CN205202752U (en) * | 2015-11-09 | 2016-05-04 | 中车大连电力牵引研发中心有限公司 | AC electric locomotive traction system |
| CN106671782A (en) * | 2015-11-09 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Alternating current electric locomotive traction system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731192A (en) * | 2020-12-14 | 2021-04-30 | 中车永济电机有限公司 | Protection method and test verification method for active power of locomotive traction converter |
| CN112731192B (en) * | 2020-12-14 | 2024-04-19 | 中车永济电机有限公司 | Protection method and test verification method for active power of locomotive traction converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105235536B (en) | A kind of motor train unit traction system and energy control method | |
| CN101202445B (en) | Method for double feed-in DC power transmission | |
| CN108189712B (en) | Ground flexible automatic neutral section passing system for electrified railway | |
| CN101369735A (en) | Method of powering emergency auxiliary loads, auxiliary converter and railway vehicle for this method | |
| CN110401252A (en) | Vehicle-mounted charge-discharge system | |
| CN101741257B (en) | Control system for restraining common-mode voltage of dual stage matrix converter | |
| CN106300414B (en) | A kind of modularization subway energy back feed device based on series and parallel structure | |
| WO2019114039A1 (en) | Multi-system emu high-voltage power supply system and train | |
| CN105141019A (en) | Electric vehicle charging system | |
| CN103986347B (en) | A kind of three-phase semi-controlled bridge type rectification triggering circuit with defencive function | |
| CN105406494A (en) | Three-phase unbalance current compensation method and device for low-voltage grid | |
| CN106451485A (en) | Comprehensive control device for power quality of transformer of electrified railway traction substation | |
| CN101348086A (en) | Pulsating direct current traction electric power supply system | |
| CN105691245B (en) | A kind of electric locomotive is without impact subregion commutation system and method | |
| CN110504660A (en) | A kind of trailer system and its grounding method of traction convertor | |
| CN103427667A (en) | High-performance static substation medium-frequency power supply | |
| CN111478616A (en) | Subway traction power supply system and bidirectional converter device | |
| RU2620128C2 (en) | Improved system of hard precharging for parallel inverters | |
| CN210224973U (en) | Integrated compensation device for in-phase power supply of electrified railway | |
| CN102420388A (en) | Train power cube for alternating current drive locomotive | |
| CN112098705A (en) | System and method for rapidly identifying AC/DC power supply system | |
| CN104410294A (en) | Train power supply system | |
| CN205595793U (en) | Tram non -contact power supply system | |
| CN201846239U (en) | Bow net arc testing power supply device | |
| CN201685719U (en) | Power van for electrified railway track maintenance vehicles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191126 |