CN102738770B - Unloading overvoltage control method for auxiliary power generation system of locomotive - Google Patents
Unloading overvoltage control method for auxiliary power generation system of locomotive Download PDFInfo
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- CN102738770B CN102738770B CN201210219201.1A CN201210219201A CN102738770B CN 102738770 B CN102738770 B CN 102738770B CN 201210219201 A CN201210219201 A CN 201210219201A CN 102738770 B CN102738770 B CN 102738770B
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Abstract
The invention discloses an unloading overvoltage control method for an auxiliary power generation system of a locomotive. The method comprises the following steps of: reducing a voltage reference set value to a temporary reference set value, controlling exciting current of auxiliary power generation to be gradually reduced, and reducing the power generation voltage of a corresponding auxiliary system from a normal reference set value to the temporary reference set value; and interrupting a high load and stopping working when output voltage of actual auxiliary power generation is reduced to be close to the temporary set value, wherein recoil voltage occurs, and because the auxiliary power generation voltage controlled in the system is in the trending process of continuously reducing, and the two voltages are superposed, the voltage of the auxiliary system is prevented from excessively increasing in the processes of interrupting the high load and stopping working.
Description
Technical field
The invention belongs to railway locomotive technical field, relate in particular to a kind of locomotive-auxiliary generating system unloading overvoltage control method.
Background technology
The auxiliary generating system of diesel locomotive generally adopts constant voltage control mode.Finish power-off moment (unloading) when filling wind compared with for example screw air compressor of heavy load equipment, the voltage of the auxiliary power generation system phenomenon of can leaping high, cause overvoltage relay action in auxiliary power generation loop, make auxiliary generating system cisco unity malfunction, even have an accident.
Summary of the invention
Object of the present invention overcomes the deficiency of above-mentioned prior art exactly, and a kind of safe and reliable locomotive-auxiliary generating system unloading overvoltage control method is provided.
The object of the present invention is achieved like this: a kind of locomotive-auxiliary generating system unloading overvoltage control method, is characterized in that taking following steps:
G. detect auxiliary generating system heavy load conversion early warning on off state, if heavy load conversion early warning switch is in closure state, return to steps A; Otherwise, enter next step;
H. will under normal the voltage of auxiliary generating system reference set value, be adjusted to interim reference set value;
I. set the first time delay and be less than the second time delay and start timing simultaneously, the voltage of auxiliary generating system starts to decline to interim reference set value simultaneously;
J. when the first time delay finishes, by heavy load power-off;
K. the second time delay continues timing, after the voltage upper punch of auxiliary generating system, falls after rise;
L., when the second time delay finishes, recover the normal reference set value of voltage of auxiliary generating system.
It is interim reference set value that technical scheme of the present invention is lowered the normal reference set value of voltage, and the exciting current of controlling auxiliary power generation diminishes gradually, and respective secondary auxiliary system generating voltage is also reduced to interim reference set value by normal reference set value; When actual auxiliary power generation output voltage is down to while closing on interim set point, heavy load power-off is quit work, so Kickback voltage starts to occur, now because system control auxiliary power generation voltage is still in continuing downward trend process, the two stack, thereby limited upwards excessively leaping high of auxiliary system voltage when heavy load power-off quits work.
Brief description of the drawings
Fig. 1 is the auxiliary generating system principle schematic of the embodiment of the present invention.
Fig. 2 is the unloading overvoltage control method main program flow block diagram of the embodiment of the present invention.
Fig. 3 is that the voltage reference of the embodiment of the present invention is set subprogram FB(flow block).
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1.The present embodiment increases by the output control of three critical quantity: pressure switch P input, screw air compressor contactor YC on the basis of original auxiliary power generation control mode, by the variable voltage reference of software set.In the time that compressor is not worked, auxiliary power generation control only has one to set normal reference value 74V.Control System of Microcomputer detects the feedback voltage of auxiliary power generation by analog input channel, and controls the excitation pulsewidth (PWM output) of auxiliary generator by high-speed outputter HSO, thereby realizes the permanent 74VDC control of auxiliary generator.When air line of locomotive pressure is during lower than 750Kpa, pressure switch P closure.Control System of Microcomputer detects after this switching value input " closure ", exports control contactor YC obtain electricly by switching value, and screw air compressor is started working and filled wind to Pneumatic brake systems.When air line of locomotive pressure is during higher than 900Kpa, pressure switch P disconnects.Auxiliary generating system unloading overvoltage control program is started working.
Referring to Fig. 2.CPU power-up initializing enters frame 2.1 and enters main program, enters frame 2.2 and in main program, passes through analog quantity A/D sense channel, draws the feedback voltage signal value of auxiliary power generation.Enter frame 2.3 and call voltage reference setting subprogram, if compressor operating is filled wind, air line of locomotive pressure is during higher than 900Kpa, pressure switch P disconnects, software starts timing, and (200ms) interior auxiliary power generation fiducial value is one and becomes interim reference set value 70V from normal reference value 74V at the appointed time; All the other times all only have a normal reference value 74V.Enter frame 2.4 and judge the more whether overvoltage or under-voltage of the feedback voltage signal value of auxiliary power generation and fiducial value.If be judged as overvoltage, enter frame 2.5 and carry out reduction regulation, the PWM duty ratio that CPU controls HSO output diminishes, and reduces the output of exciting current, thereby reduces the output voltage of actual auxiliary generator.Enter frame 2.6 and return to main program.Under-voltage else if, enter frame 2.7 adjusting of boosting, the PWM duty ratio that CPU controls HSO output becomes large, increases the output of exciting current, thereby increases the output voltage of actual auxiliary generator.Enter frame 2.8 and return to main program.
Set subprogram referring to Fig. 3 voltage reference.First enter frame 3.1 timing mark FLAG assignment is meaned to auxiliary generating system voltage reference value is normal reference value 74V for " 0 ".Then enter the state (closed or disconnection) that frame 3.2 detects air system pressure switch P.Enter frame 3.3 and judge statement " whether pressure switch P is switched to off-state by closure ", this state only has " compressor operating (pressure switch P closure) is filled wind to air pipe line; when air line of locomotive pressure is during higher than 900Kpa, when pressure switch P disconnects automatically " just to there will be.If be judged as "Yes" enter frame 3.7 by timing mark FLAG assignment for " 1 ", software timer starts timing simultaneously.Once enter frame 3.8 program judgement symbol FLAG=1, in (200ms), mark FLAG will be forced to by program " 1 " always at the appointed time, and the normal reference set value of auxiliary generating system voltage becomes interim reference set value 70V from normal reference value 74V; Set the first time delay 100ms and the second time delay 200ms and start timing simultaneously.Enter frame 3.9 and judge that statement " exceedes the second time delay ", if exceeded, entering frame 3.10 is " 0 " by timing mark FLAG assignment, so, auxiliary generating system voltage setting fiducial value is normal reference value 74V always, until the arriving of next " whether pressure switch P is switched to off-state by closure "; Otherwise enter frame 3.11 judge statement " exceeding the first time delay? "If exceed the first time delay, just enter frame 3.12CPU and will export to control compressor contactor YC power-off by switching value, finish to fill after wind work, enter frame 3.13 and return to main program; Otherwise enter frame 3.6 and directly return to main program.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (1)
1. a locomotive-auxiliary generating system unloading overvoltage control method, is characterized in that taking following steps:
A. detect auxiliary generating system heavy load conversion early warning on off state, if heavy load conversion early warning switch is in closure state, return to steps A; Otherwise, enter next step;
B. will under normal the voltage of auxiliary generating system reference set value, be adjusted to interim reference set value;
C. set the first time delay and be less than the second time delay and start timing simultaneously, the voltage of auxiliary generating system starts to decline to interim reference set value simultaneously;
D. when the first time delay finishes, by heavy load power-off;
E. the second time delay continues timing, after the voltage upper punch of auxiliary generating system, falls after rise;
F., when the second time delay finishes, recover the normal reference set value of voltage of auxiliary generating system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210219201.1A CN102738770B (en) | 2012-06-29 | 2012-06-29 | Unloading overvoltage control method for auxiliary power generation system of locomotive |
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| CN201210219201.1A CN102738770B (en) | 2012-06-29 | 2012-06-29 | Unloading overvoltage control method for auxiliary power generation system of locomotive |
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| CN102738770A CN102738770A (en) | 2012-10-17 |
| CN102738770B true CN102738770B (en) | 2014-06-04 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103684159B (en) * | 2013-12-05 | 2016-06-29 | 中国北车集团大连机车车辆有限公司 | Prevent the control method of diesel locomotive auxiliary electricity generation circuit from overvoltage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5589762A (en) * | 1991-02-22 | 1996-12-31 | Sgs-Thomson Microelectronics, Inc. | Adaptive voltage regulator |
| DE10262000A1 (en) * | 2002-07-12 | 2004-02-26 | Audi Ag | On-board vehicle electrical system has 2 voltage levels coupled by coupling device, regulating device that controls longitudinal regulator taking into account future load on second voltage level |
| CN101010863A (en) * | 2004-08-27 | 2007-08-01 | 罗伯特·博世有限公司 | Voltage regulator with over-voltage protection |
| CN101436826A (en) * | 2007-09-28 | 2009-05-20 | 雅达电子国际有限公司 | Fast transient step load response in a power converter |
| CN101753022A (en) * | 2008-12-10 | 2010-06-23 | 成都芯源系统有限公司 | Load transient change detection circuit for voltage converter and application circuit thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7449869B2 (en) * | 2004-09-01 | 2008-11-11 | Artesyn Technologies, Inc. | Digital current mode controller with low frequency current sampling |
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- 2012-06-29 CN CN201210219201.1A patent/CN102738770B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5589762A (en) * | 1991-02-22 | 1996-12-31 | Sgs-Thomson Microelectronics, Inc. | Adaptive voltage regulator |
| DE10262000A1 (en) * | 2002-07-12 | 2004-02-26 | Audi Ag | On-board vehicle electrical system has 2 voltage levels coupled by coupling device, regulating device that controls longitudinal regulator taking into account future load on second voltage level |
| CN101010863A (en) * | 2004-08-27 | 2007-08-01 | 罗伯特·博世有限公司 | Voltage regulator with over-voltage protection |
| CN101436826A (en) * | 2007-09-28 | 2009-05-20 | 雅达电子国际有限公司 | Fast transient step load response in a power converter |
| CN101753022A (en) * | 2008-12-10 | 2010-06-23 | 成都芯源系统有限公司 | Load transient change detection circuit for voltage converter and application circuit thereof |
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| CN102738770A (en) | 2012-10-17 |
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