CN108001485B - Automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection - Google Patents
Automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection Download PDFInfo
- Publication number
- CN108001485B CN108001485B CN201610933759.4A CN201610933759A CN108001485B CN 108001485 B CN108001485 B CN 108001485B CN 201610933759 A CN201610933759 A CN 201610933759A CN 108001485 B CN108001485 B CN 108001485B
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- Prior art keywords
- load
- failure
- ground connection
- assistant load
- assistant
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
This example provides the automatic identification after a kind of electric locomotive assistant load ground connection and automatic cutting method, effectively the assistant load being grounded can identify and cut off using the method, its auxiliary system uses specific control logic, when subordinate inverter normally starts, six assistant loads in parallel pass through respective contactor sequence starting, mutual starting time interval 3 seconds.When ground fault occurs, by three sections of conventional resistance-type grounded inspection circuits of switching control cooperation of the control unit to assistant load, reach the function of setting and cut off to ground connection load, so that failure will not be further enlarged.
Description
Technical field
The present invention relates to after electric locomotive auxiliary converter system technology more particularly to a kind of electric locomotive assistant load ground connection
Automatic identification and automatic cutting method.
Background technique
In the world today, electric locomotive has marched toward the AC Drive epoch from the DC Transmission epoch, electric locomotive also because
This has moved towards the high-speed overload stage, obtains unprecedented development.Auxiliary system as electric locomotive important component,
It is played a crucial role in locomotive operation, meanwhile, when the ground fault of assistant load is also in locomotive day-to-day operation
There is generation.
Currently, being all made of three-phase inverter in electric locomotive auxiliary converter system and being powered to assistant load, auxiliary is negative
Carry the output end for being connected in parallel to inverter.Since structure is complicated for circuit of electric locomotive, installation space is smaller, therefore, it is impossible to give
Each assistant load is equipped with current transformer or sensor.Although increasing three sections of resistance-types in the direct-flow input end of inverter to connect
Ground detection circuit if can have a generation in several assistant loads in parallel to detecting after carrying ground
It is grounded, conventional auxiliary system can not be identified and be cut off to the load of ground connection, and ground fault meeting further expansion causes entire
Inverter can not work normally.
Summary of the invention
The content of present invention is the automatic identification and automatic cutting method after a kind of electric locomotive assistant load is grounded, and passes through machine
Vehicle closes the control logic of co-host break three times, cooperates three sections of resistive bridge grounded inspection circuits of locomotive, Lai Shixian assistant load ground connection
Automatic identification and excision afterwards.
Automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection, which is characterized in that work as locomotive
It is closed main circuit breaker, AuCT starting, assistant load sequence starting, when grounded inspection circuit has detected ground fault,
It is disconnected main disconnected, stop AuCT, reporting fault records the title of previous assistant load, is closed main circuit breaker again, and auxiliary becomes
Stream device is again started up, assistant load sequence starting again:
A kind of start is that detection circuit does not detect ground connection,
Locomotive operates normally, and judges failure for failure living；
It is a kind of to start as when grounded inspection circuit has detected ground fault again, master of breaking is disconnected, stop AuCT,
Reporting fault again, records the title of previous assistant load, control unit judgement twice load fault whether be
Same load,
Failure occurs in same load, and positioning both ground point is that the load is grounded,
Co-host break is closed, AuCT is started, load fault is not put into, the starting of other Mo-Co catalysts,
Failure occurs in different loads, is complexity failure, breaks main disconnected, stops AuCT.
Further, normal by switching control cooperation of the control unit to assistant load when the ground fault occurs
Rule three sections of resistance-type grounded inspection circuits, reach to ground connection load the function of setting and cut off so that failure will not by into
One step expands.
Further, the assistant load is put by respective contactor sequence, and being spaced apart from each other is 3 seconds, negative to be grounded
Surplus has been stopped in the detection and positioning of load.
Further, by assisting the control logic and identification operation of described control unit, reach and judge failure and positioning
Failure, the final purpose for realizing excision failure.
Detailed description of the invention
Fig. 1 is that a kind of locomotive assisting system of the present invention uses inverter power supply circuit diagram；
Fig. 2 is the automatic identification and automatic cutting method flow chart after a kind of electric locomotive assistant load is grounded.
Specific embodiment
Automatic identification and automatic cutting method after being grounded the present invention relates to a kind of electric locomotive assistant load, now pass through tool
Body embodiment is described in detail.
Fig. 1 is that a kind of locomotive assisting system of the present invention uses inverter power supply circuit diagram, as shown in Figure 1, a kind of
A kind of locomotive assisting system involved in automatic identification and automatic cutting method after electric locomotive assistant load ground connection is using inverse
Become device power supply, the output end of inverter is connected in parallel to by six accessory fans, each is equipped with starting contactor, in auxiliary system
Between reached equipped with three sections of resistive bridge grounded inspection circuits for detecting the voltage condition of intermediate DC link circuit in circuit
To the purpose of earthing detection.
When auxiliary system in the present invention normally starts, main circuit breaker of railway engine closure, inverter startup, then, six auxiliary
Help Mo-Co catalyst to start, between be divided into 3 seconds.After putting into a certain load, grounded inspection circuit detects ground connection, breaks
It is main disconnected, stop AuCT, reporting fault and the investment node for recording auxiliary, after 5 seconds, closes co-host break, starting auxiliary again
Inverter, assistant load sequence starting again, if without grounding alarm, it is believed that be failure living, locomotive operates normally.When
When grounding alarm occurring again, to break again main disconnected, stop AuCT again, reporting fault name records the investment node of auxiliary,
Malfunctioning node twice is judged by control unit, if it is same node, is confirmed as true failure, after positioning failure,
Co-host break is closed again, is started subordinate inverter, is just no longer put into the assistant load positioned in load starting, reaches ground connection load
The purpose of excision.Flow chart is as shown in Figure 2.When locomotive is closed main circuit breaker, AuCT starting, assistant load sequence is opened
Dynamic, when grounded inspection circuit has detected ground fault, master of breaking is disconnected, stops AuCT, reporting fault records previous auxiliary
The title of load is closed main circuit breaker again, and AuCT is again started up, assistant load sequence starting again:
A kind of start is that detection circuit does not detect ground connection, and locomotive operates normally, and judges failure for failure living；
It is a kind of to start as when grounded inspection circuit has detected ground fault again, master of breaking is disconnected, stops AuCT, again
Reporting fault records the title of previous assistant load, and whether load fault is same load, failure twice for control unit judgement
Occur in same load, positioning both ground point is that the load is grounded, and closes co-host break, starts AuCT, load fault is not
Investment, the starting of other Mo-Co catalysts, failure occur in different loads, are complexity failure, break main disconnected, stop AuCT.
It is merely illustrative of the technical solution of the present invention finally, it should be noted that implementing structure above, rather than its limitations；To the greatest extent
Invention is explained in detail referring to aforementioned implementation structure for pipe, those skilled in the art should understand that: its according to
It is so possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, each implementation structure technology scheme of the present invention that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (4)
1. automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection, which is characterized in that when locomotive closes
Co-host break road device, AuCT starting, assistant load sequence starting are broken when grounded inspection circuit has detected ground fault
It is main disconnected, stop AuCT, reporting fault records the title of previous assistant load, is closed main circuit breaker, auxiliary converter again
Device is again started up, assistant load sequence starting again:
A kind of start is that detection circuit does not detect ground connection, and locomotive operates normally, and judges failure for failure living；
It is a kind of to start as when grounded inspection circuit has detected ground fault again, master of breaking is disconnected, stops AuCT, reports again
Failure records the title of previous assistant load, and whether load fault is same load twice for control unit judgement, and failure occurs
In same load, positioning both ground point is that the load is grounded, and closes co-host break, starts AuCT, and load fault is not put into,
The starting of other Mo-Co catalysts, failure occur in different loads, are complexity failure, break main disconnected, stop AuCT.
2. automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection according to claim 1,
It is characterized in that, cooperating conventional three to the switching control of assistant load by control unit when the ground fault occurs
Section resistance-type grounded inspection circuit, reaches the function of setting and cut off to ground connection load, so that failure will not further be expanded
Greatly.
3. automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection according to claim 1,
It is characterized in that, the assistant load is put by respective contactor sequence, being spaced apart from each other is 3 seconds, for the inspection of ground connection load
It surveys and surplus has been stopped in positioning.
4. automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection according to claim 1,
It is characterized in that, reaching by the control logic and identification operation of auxiliary described control unit and judging failure and positioning failure, most
The purpose of excision failure is realized eventually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610933759.4A CN108001485B (en) | 2016-10-31 | 2016-10-31 | Automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610933759.4A CN108001485B (en) | 2016-10-31 | 2016-10-31 | Automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection |
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| Publication Number | Publication Date |
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| CN108001485A CN108001485A (en) | 2018-05-08 |
| CN108001485B true CN108001485B (en) | 2019-11-05 |
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| CN201610933759.4A Active CN108001485B (en) | 2016-10-31 | 2016-10-31 | Automatic identification and automatic cutting method after a kind of electric locomotive assistant load ground connection |
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| CN111884247A (en) * | 2019-08-19 | 2020-11-03 | 株洲中车时代电气股份有限公司 | Circuit structure and fault processing method and device thereof |
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| CN101261301A (en) * | 2008-04-18 | 2008-09-10 | 南车株洲电力机车有限公司 | Locomotive control loop grounding detection circuit and grounding detection method and wire break detection method |
| CN101609124B (en) * | 2009-07-03 | 2012-09-26 | 株洲南车时代电气股份有限公司 | Grounding detecting method of power supply system of train |
| JP5774351B2 (en) * | 2011-04-12 | 2015-09-09 | 株式会社東芝 | Electric car system |
| CN103770650B (en) * | 2012-10-22 | 2016-08-31 | 中车大同电力机车有限公司 | Locomotive traction and aid system Integral grounding protection device |
| CN106026053A (en) * | 2016-08-02 | 2016-10-12 | 辽宁拓新电力电子有限公司 | Single phase earth fault positioning and isolating system and method based on low-excitation impedance transformer |
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