CN114312337B - Power supply method, computer readable storage medium, power supply system and locomotive - Google Patents
Power supply method, computer readable storage medium, power supply system and locomotive Download PDFInfo
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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
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Abstract
The invention discloses a power supply method, a computer readable storage medium, a power supply system and a locomotive, and relates to the technical field of rail transit. According to the invention, the positions of the starting point and the ending point of the locomotive and the no-electricity zone and the section distance of the electricity zone are judged, so that the switching between the power supply mode of the overhead line system and the power supply mode of the storage battery is realized by controlling the lifting of the pantograph and the on-off of the storage battery and the locomotive power utilization system at a specific position through the CCU on the premise of safety. The invention does not need to arrange positioning points on the ground line, thereby saving cost, being easy to realize, having strong adaptability, realizing automatic switching of power supply modes when the locomotive runs in a mixed section of a power-on area and a power-off area, reducing the labor intensity of a driver and improving the operation efficiency and the operation safety.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a power supply method, a computer readable storage medium, a power supply system and a locomotive.
Background
One of the working scenarios of shunting locomotives is as follows: when the electric power control device is operated in a mixed section formed by a net section (electrified contact net) and a net-free section, in order to prolong the endurance time of a vehicle-mounted energy storage power supply as much as possible, the electric power control device is operated by lifting a pantograph in the net section, but the electric power control device is operated by lowering the pantograph in the net-free section through the vehicle-mounted energy storage power supply, in the use process, a driver is required to frequently perform the operation of lifting/lowering the pantograph according to the distribution condition of the net section and the net-free section on an operation line so as to switch the operation mode of the shunting locomotive, and the electric power control device is required to stop operation, has low efficiency and high labor intensity, is inaccurate in operation, and is easy to cause safety accidents such as arc scraping caused by untimely lowering the pantograph.
Currently, when a shunting locomotive runs in a mixed section formed by a network section and a non-network section, the switching of the running mode depends on manual operation of a driver or power supply by using an on-board energy storage power supply in the whole process.
If the manual operation of a driver is relied on, when frequent switching is needed, misoperation or untimely operation can be caused, so that the problems of high labor intensity, low efficiency and poor safety exist. And if the vehicle-mounted energy storage power supply is used in the whole process, the vehicle-mounted electricity storage capacity of the vehicle-mounted energy storage power supply is required to be large, and meanwhile, the quick charging capability of the vehicle-mounted energy storage power supply and the service life of the vehicle-mounted energy storage power supply which is more than ten thousand times are not fully utilized, so that the single purchase cost and the total life cycle cost are high. If the labels are arranged on the running line of the shunting locomotive, and the positioning and running mode switching are realized by installing the reading device on the shunting locomotive, the control effect according to the highest speed limit can be realized, but the control effect based on the dynamic speed cannot be realized, and the charging time during the running of the network section is wasted to a certain extent, so that the whole-locomotive cost control and the market popularization are not facilitated.
The Chinese patent with publication number CN112350386A discloses an alternating current-direct current switching identification system and an alternating current-direct current switching method for a double-flow vehicle, wherein all or part of seven identifications of a conversion area forenotice identification, an idle running identification, an alternating current-direct current switching identification, a dead space forenotice identification, a dead space identification, a second power supply area identification and a power running identification which can be observed by a driver or collected by an identification collecting device on the double-flow vehicle are sequentially arranged along the running direction of the vehicle; the conversion area forecast identification, the idle running identification, the alternating current-direct current switching identification and the dead space forecast identification are located in a first power supply system area, the dead space identification is located in a dead space, and the second power supply area identification and the force running identification are located in a second power supply system area. The distance between the seven marks is fixed once installed, and the distance cannot be changed according to the running speed of the train or special conditions.
Disclosure of Invention
The invention aims to solve the technical problem of providing a power supply method, a computer readable storage medium, a power supply system and a locomotive aiming at the defects of the prior art, and the automatic switching function of a power supply mode is completed when the locomotive is in a mixed section formed by a network section and a non-network section.
In order to solve the technical problems, the invention adopts the following technical scheme: a method of supplying power comprising the steps of:
I. judging whether the locomotive runs in a network section and is powered by the contact network; if yes, entering a step II, otherwise entering a step III;
II. Judging whether the locomotive speed is zero, and L8 is smaller than L1+L2+L3; if yes, prompting a driver to manually select a storage battery mode; if not, entering the step V; l8 is the distance between the locomotive running in the network area and the starting point of the network-free area to be entered;
III, judging whether the locomotive is positioned in a network-free area, if so, entering a step V; otherwise, keeping the current power supply mode;
IV, judging whether the interval length L7 of the network area to be accessed meets the requirement
And (3) if the L7 is more than or equal to L1+L2+L3+L4+L5+L6+L3, entering a step V; otherwise, keeping the current power supply mode;
v, judging the position of the locomotive:
at the position with the distance of L1+L2+L3 from the starting point of the net-free area, the traction is blocked, and the main breaker 1 is disconnected;
judging whether the main breaker 1 is disconnected and the pantograph is lowered at a position with a distance of L2+L3 from the starting point of the no-network area;
if yes, closing the main breaker 2; otherwise, penalty braking is applied until stopping;
at the position with the distance L3 from the starting point of the no-network area, judging whether the main circuit breaker 1 is disconnected, the pantograph is lowered and the locomotive is powered by the storage battery; if yes, displaying that the switching between the network area and the non-network area is successful; otherwise, applying emergency braking;
at a distance L4 from the end point of the no-network area, the traction and disconnection of the main breaker 2 are blocked;
judging whether the main breaker 2 is disconnected or not at a position with a distance of L4+L5 from the end point of the no-network area; if yes, closing the main breaker 1; otherwise, penalty braking is applied until stopping;
judging whether the main circuit breaker 2 is disconnected and the locomotive is powered by the contact net at the position with the distance of L4+L5+L6 from the end point of the no-net zone; if yes, displaying that the conversion of the non-network area/the network area is successful; otherwise, applying emergency braking;
l1 is the distance that the pantograph finishes the locomotive running in the pantograph-falling period, L2 is the distance that the locomotive running in the period is successfully configured in the power supply mode of the storage battery, L3 is the emergency braking distance of the locomotive, L4 is the positioning error of the locomotive, L5 is the distance that the locomotive running in the period is disconnected in the power supply mode of the storage battery, and L6 is the distance that the locomotive running in the period is successfully configured in the power supply mode of the contact net.
The starting point of the no-network area refers to the junction point of the network area and the no-network area in the direction from the network area to the no-network area. The end point of the no-network area refers to the junction point of the no-network area and the network area in the direction of entering the network area from the no-network area. When the main circuit breaker 1 is disconnected, the pantograph falls down, and the locomotive is disconnected with the overhead contact system. When the main circuit breaker 1 is closed, the pantograph rises, and the locomotive is powered by the overhead contact system. When the main breaker 2 is opened, the storage battery is disconnected from the locomotive power system. When the main breaker 2 is closed, the locomotive is powered by the storage battery.
Considering the distance L1 of the locomotive running in the pantograph completing the pantograph lowering period, the maximum distance L3 between the distance L2 of the locomotive running in the storage battery power supply mode successful configuration period and the emergency braking, when the locomotive runs to the position with the distance of L1+L2+L3 from the starting point of the no-network area, the switching of the contact network power supply mode to the storage battery power supply mode is started, the locomotive can be ensured to complete the pantograph lowering and successfully configure the storage battery when entering the no-network area, the normal implementation of the emergency braking is ensured, and the safety risk can be reduced. When the locomotive runs to the position with the distance of L2+L3 from the starting point of the no-network area, under normal conditions, the pantograph of the locomotive finishes the bow lowering, and if the system is possibly fault due to incomplete explanation, punishment braking is applied to avoid accidents. When the locomotive runs to the position with the distance L3 from the starting point of the no-network area, judging whether the switching is successful or not, otherwise, carrying out emergency braking, so that the maximum distance L3 of the emergency braking is reserved, and potential safety hazards caused by that the locomotive is about to reach the no-network area but the storage battery is not successfully configured can be avoided.
Considering the positioning error L4 of the locomotive, the distance between the locomotive and the net-free area end point is L4, and the power supply mode of the storage battery is switched to the power supply mode of the contact net, so that the pantograph is in good contact with the contact net. The locomotive runs to the position with the distance of L4+L5 from the end point of the no-network area, and under normal conditions, the storage battery is disconnected with the locomotive power utilization system, if the connection is not disconnected, the system is possibly broken, and punishment braking is applied to avoid accidents. The locomotive runs to the position with the distance of L4+L5+L6 from the end point of the no-network area, the configuration of the contact network is normally completed, and if the configuration is unsuccessful, the safety of the locomotive can be ensured by applying emergency braking.
When the L8 is smaller than the L1 plus L2 plus L3, the locomotive possibly cannot complete the switching from the contact net power supply mode to the storage battery power supply mode when entering the no-network area, and the storage battery mode is selected at the moment, so that the occurrence of danger can be avoided. When the interval length L7 of the entering network area is smaller than L1+L2+L3+L4+L5+L6+L3, the section distance of the network area where the locomotive enters from the non-network area is short, and after the switching from the power supply mode of the overhead line system to the power supply mode of the storage battery is possibly not completed, the switching from the power supply mode of the storage battery to the power supply mode of the overhead line system is completed, so that the current power supply mode is maintained, and the occurrence of danger can be avoided.
Specifically, l1=v×t by the formula 1 Calculating the distance L1 of the shunting machine running in the period of completing bow lowering of the pantograph; by the formula l2=v×t 4 Calculating the distance L2 of the operation of the shunting machine in the successful configuration period of the storage battery power supply mode; by the formulaCalculating an emergency braking distance L3 of the shunting machine; by the formula l5=v×t 3 Calculating the distance L5 of the operation of the shunting machine in the period of disconnecting the power supply mode of the storage battery; by the formula l6=v×t 2 And calculating the distance L6 of the operation of the shunting machine in the successful configuration period of the power supply mode of the contact network. t is t 1 Time t required for successful bow lowering of pantograph 2 Time t required for successful configuration of contact net mode 3 Time t required for successful cutting of battery mode 4 Time t required for successful configuration of battery mode k For braking idle time, V is the current speed value of the locomotive, M is the dead weight of the locomotive, Q is the traction load value, F d Is the emergency braking force of the whole vehicle.
According to the TB/T1407 train traction calculation procedure, the calculation formula of the emergency braking distance L3 to the shunting machine is equal to the sum of the braking free distance and the braking effective distance, and the braking free distance isWherein->In order to convert the speed unit from km/h to m/s, t k Refers to brake lost motion time, according to the physical formula: end speed 2 -initial velocity 2 Displacement =2 x acceleration, initial velocity ++>End speed 0, acceleration +.>The calculation formula of the available displacement, namely the braking effective distance is
Based on the same technical idea, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, implements the power supply method.
Based on the same technical conception, the invention also provides a power supply system which comprises a central control unit and a positioning module for acquiring the real-time position of the locomotive, wherein the central control unit is programmed or configured for executing the power supply method. The specific implementation mode of the positioning module is a GPS or Beidou positioning system.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the positions of the starting point and the ending point of the locomotive and the no-electricity zone and the section distance of the electricity zone are judged, so that the lifting of the pantograph and the on-off of the storage battery and the locomotive electricity utilization system are controlled at a specific position by the central control unit under the premise of ensuring safety, and the switching between the power supply mode of the overhead line system and the power supply mode of the storage battery is realized. The invention does not need to arrange positioning points on the ground line, thereby saving cost, being easy to realize, having strong adaptability, realizing automatic switching of power supply modes when the locomotive runs in a mixed section of a power-on area and a power-off area, reducing the labor intensity of a driver and improving the operation efficiency and the operation safety.
Drawings
FIG. 1 is a flowchart of a power supply method according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a position signal calibration according to an embodiment of the invention.
Wherein, C1 is the shunting machine, P1 is the starting point of the powering-on operation of the shunting machine or the position of the shunting machine running in the network area, P2 is the starting point of the network-free area, P3 is the end point of the network-free area, P4 is the starting point of the next network-free area, L7 is the interval length of the network area, and L8 is the distance between the shunting machine running in the network area and the starting point of the network-free area to be entered.
Detailed Description
As shown in fig. 1, the locomotive according to an embodiment of the present invention is a shunting machine C1, where the current speed V of the shunting machine is 40km/h. Time t required for successful bow lowering of pantograph 1 10s, time t required for successful configuration of contact net mode 2 15s, time t required for successful battery mode cutting 3 4s, time t required for successful configuration of storage battery mode 4 7s.
The shunting machine is provided with a switching system of a power supply mode, the system comprises a GPS positioning module and a central control unit, the GPS positioning module is used for positioning the shunting machine in real time, and the central control unit is configured or becomes a power supply executing method.
First, by the formula l1=v×t 1 Calculating the distance L1 of the shunting machine running in the period of completing bow lowering of the pantograph to be 111m, and calculating the distance L2 = V x t by the formula L2 =V x t 4 Calculating the distance L2 of the operation of the shunting machine within the successful configuration period of the storage battery power supply mode to be 78m, and passing through the formulaThe emergency braking distance L3 of the shunting machine was calculated to be 250m. The pantograph is 15 m from the car end, and the positioning error L4 of the shunting machine is set to be 20m. By the formula l5=v×t 3 Calculating the distance L5 of the operation of the shunting machine in the period of disconnecting the power supply mode of the storage battery to be 45m, and calculating the distance L6=V×t by the formula 2 And calculating the distance L6 of the operation of the shunting machine within the successful configuration period of the power supply mode of the contact net to be 167m. M is the dead weight of the shunting machine, Q is the traction load value, t k To brake the idle time, t in this embodiment k ＝5，F d Is the emergency braking force of the whole vehicle.
As shown in fig. 2, on the driving route of the shunting machine, if the starting point of the power-on operation of the shunting machine is a network area, the distance between the starting point P1 of the power-on operation of the shunting machine and the starting point P2 of the no-network area is determined, if the distance is greater than 439m, on the driving route of the section with the network area, the position signal 1 is calibrated at 439m from the starting point P2 of the no-network area, the signal 2 is calibrated at 328m from the starting point P2 of the no-network area, and the position signal 3 is calibrated at 250m from the starting point P2 of the no-network area.
As shown in FIG. 2, on the driving route of the shunting machine, in the direction of entering the network area from the network-free area, it is determined whether the interval length L7 of the network area to be entered satisfies L7 more than or equal to 921m, if so, on the driving route of the network area to be entered, the signal 4 is calibrated at a distance of 20m from the network-free area end point P3, the signal 5 is calibrated at a distance of 65m from the network-free area end point P3, the signal 6 is calibrated at a distance of 232m from the network-free area end point P3, the position signal 1 is calibrated at a distance of 439m from the next network-free area end point P4, the signal 2 is calibrated at a distance of 328m from the next network-free area end point P4, and the signal 3 is calibrated at a distance of 250m from the next network-free area end point P4.
The power supply method comprises the following steps:
I. judging whether the shunting machine operates in a network section or not and is powered by a contact network; if yes, entering a step II, otherwise entering a step III;
II. Judging whether the speed of the shunting machine is zero, wherein L8 is less than 439m; if yes, prompting a driver to manually select a storage battery mode; if not, entering the step V; l8 is the distance between the shunting machine running in the network area and the starting point of the network-free area to be entered;
III, judging whether the shunting machine is positioned in a network-free area, if so, entering a step V; otherwise, keeping the current power supply mode;
IV, judging whether the interval length L7 of the to-be-entered network area meets L7 not less than 921m, if so, entering the step
V, V; otherwise, keeping the current power supply mode;
v, judging the position of the shunting machine:
at the position signal 1, the traction and opening of the main breaker 1 are blocked;
at the position signal 2, it is judged whether the main breaker 1 has been opened and the pantograph has been lowered; if yes, closing the main breaker 2; otherwise, penalty braking is applied until stopping;
at the position signal 3, judging whether the main breaker 1 is opened, the pantograph is lowered and the shunting machine is powered by a storage battery; if yes, displaying that the switching between the network area and the non-network area is successful; otherwise, applying emergency braking;
at the position signal 4, the main circuit breaker 2 is blocked from pulling and opening;
at the position signal 5, it is judged whether the main breaker 2 has been opened; if yes, closing the main breaker 1; otherwise, penalty braking is applied until stopping;
at the position signal 6, judging whether the main breaker 2 is opened and the shunting machine is powered by the overhead line; if yes, displaying that the conversion of the non-network area/the network area is successful; otherwise emergency braking is applied.
The present embodiment also includes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the power supply method.
Claims (4)
1. A method of supplying power, comprising the steps of:
I. judging whether the locomotive runs in a network section and is powered by the contact network; if yes, entering a step II, otherwise entering a step III;
II. Judging whether the locomotive speed is zero, and L8 is smaller than L1+L2+L3; if yes, prompting a driver to manually select a storage battery mode; if not, entering the step V; l8 is the distance between the locomotive running in the network area and the starting point of the network-free area to be entered;
III, judging whether the locomotive is positioned in a network-free area, if so, entering a step V; otherwise, keeping the current power supply mode;
IV, judging whether the interval length L7 of the to-be-entered network area meets the condition that L7 is more than or equal to L1+L2+L3+L4+L5+L6+L3, if yes, entering a step V; otherwise, keeping the current power supply mode;
v, judging the position of the locomotive:
at the position with the distance of L1+L2+L3 from the starting point of the net-free area, the traction is blocked, and the main breaker 1 is disconnected;
judging whether the main breaker 1 is disconnected and the pantograph is lowered at a position with a distance of L2+L3 from the starting point of the no-network area; if yes, closing the main breaker 2; otherwise, penalty braking is applied until stopping;
at the position with the distance L3 from the starting point of the no-network area, judging whether the main circuit breaker 1 is disconnected, the pantograph is lowered and the locomotive is powered by the storage battery; if yes, displaying that the switching between the network area and the non-network area is successful; otherwise, applying emergency braking;
at a distance L4 from the end point of the no-network area, the traction and disconnection of the main breaker 2 are blocked;
judging whether the main breaker 2 is disconnected or not at the position with the distance of L4+L5 from the end point of the no-network area; if yes, closing the main breaker 1; otherwise, penalty braking is applied until stopping;
judging whether the main circuit breaker 2 is disconnected and the locomotive is powered by the contact net at the position with the distance of L4+L5+L6 from the end point of the no-net area; if yes, displaying that the conversion of the non-network area/the network area is successful; otherwise, applying emergency braking;
l1 is the distance of the pantograph to finish the locomotive running in the pantograph lowering period, L2 is the distance of the locomotive running in the period of successful configuration of the power supply mode of the storage battery, L3 is the emergency braking distance of the locomotive, L4 is the positioning error of the locomotive, L5 is the distance of the locomotive running in the period of disconnection of the power supply mode of the storage battery, and L6 is the distance of the locomotive running in the period of successful configuration of the power supply mode of the overhead contact system;
by the formula l1=v×t 1 Calculating the distance L1 of the shunting machine running in the period of completing bow lowering of the pantograph; by the formula l2=v×t 4 Calculating the distance L2 of the operation of the shunting machine in the successful configuration period of the storage battery power supply mode; by the formulaCalculating an emergency braking distance L3 of the shunting machine; by the formula l5=v×t 3 Calculating the distance L5 of the operation of the shunting machine in the period of disconnecting the power supply mode of the storage battery; by the formula l6=v×t 2 Calculating the distance L6 of the operation of the shunting machine in the successful configuration period of the power supply mode of the contact network;
t 1 time t required for successful bow lowering of pantograph 2 Time t required for successful configuration of contact net mode 3 Time t required for successful cutting of battery mode 4 Time t required for successful configuration of battery mode k For braking idle time, V is the current speed value of the locomotive, M is the dead weight of the locomotive, Q is the traction load value, F d Is the emergency braking force of the whole vehicle.
2. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the power supply method as claimed in claim 1.
3. A power supply system comprising a central control unit and a positioning module for acquiring a real-time position of a locomotive, characterized in that the central control unit is programmed or configured for performing the power supply method of claim 1.
4. A locomotive comprising the power supply system of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210003073.0A CN114312337B (en) | 2022-01-04 | 2022-01-04 | Power supply method, computer readable storage medium, power supply system and locomotive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210003073.0A CN114312337B (en) | 2022-01-04 | 2022-01-04 | Power supply method, computer readable storage medium, power supply system and locomotive |
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| CN114312337B true CN114312337B (en) | 2023-11-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1216910A1 (en) * | 2000-12-20 | 2002-06-26 | EISENMANN MASCHINENBAU KG (Komplementär: EISENMANN-Stiftung) | Conveying arrangement, especially electric overhead conveyor |
| CN103204067A (en) * | 2013-03-26 | 2013-07-17 | 南车株洲电力机车有限公司 | Method and device for controlling power supply of double energy sources |
| CN112350386A (en) * | 2020-11-17 | 2021-02-09 | 重庆市铁路(集团)有限公司 | Alternating current and direct current switching identification system and alternating current and direct current switching method for double-current system vehicle |
| CN113200061A (en) * | 2021-05-31 | 2021-08-03 | 中车青岛四方机车车辆股份有限公司 | Storage battery traction control system, control method and train |
-
2022
- 2022-01-04 CN CN202210003073.0A patent/CN114312337B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1216910A1 (en) * | 2000-12-20 | 2002-06-26 | EISENMANN MASCHINENBAU KG (Komplementär: EISENMANN-Stiftung) | Conveying arrangement, especially electric overhead conveyor |
| CN103204067A (en) * | 2013-03-26 | 2013-07-17 | 南车株洲电力机车有限公司 | Method and device for controlling power supply of double energy sources |
| CN112350386A (en) * | 2020-11-17 | 2021-02-09 | 重庆市铁路(集团)有限公司 | Alternating current and direct current switching identification system and alternating current and direct current switching method for double-current system vehicle |
| CN113200061A (en) * | 2021-05-31 | 2021-08-03 | 中车青岛四方机车车辆股份有限公司 | Storage battery traction control system, control method and train |
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| CN114312337A (en) | 2022-04-12 |
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