CN-122009106-A - Control method and system for operation of heavy-duty train in long and large downhill section

CN122009106ACN 122009106 ACN122009106 ACN 122009106ACN-122009106-A

Abstract

The invention relates to the field of train operation control, and discloses a control method and a control system for operation of a heavy-duty train in a long and large downhill section. The method comprises the steps of obtaining train line data, further determining a braking section, a relieving section, a pressure reducing amount applying position of the braking section and a relieving position of the relieving section, respectively making constraint conditions of the sections according to basic operation data of a train, setting a suggested electric braking force of the pressure reducing amount applying position and a suggested electric braking force of the relieving position, and a suggested operation speed of the pressure reducing amount applying position and a suggested operation speed of the relieving position, respectively generating control strategies of the sections according to the suggested electric braking force and the suggested operation speed, determining a target section according to the current position of the train under the condition that the constraint conditions are triggered, and controlling the operation state of the train according to the control strategies corresponding to the target section. The method can reduce the stopping times of the train in the long and large downhill road section, increase the braking distance of the train, reduce the energy consumption and improve the transportation efficiency.

Inventors

SU MINGLIANG
WANG ZHIYI
WANG QINGYUAN
SUN PENGFEI
WANG KAIYUN
Wei mai

Assignees

国能朔黄铁路发展有限责任公司
西南交通大学

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (10)

1. A control method for operation of a heavy-duty train in a long downhill section, comprising: Acquiring line data of a train operation line; Determining a plurality of braking intervals and a plurality of relieving intervals according to the line data and a preset relieving gradient value, and respectively determining the pressure reduction application amount position of each braking interval and the relieving position of each relieving interval according to the plurality of braking intervals and the plurality of relieving intervals; Respectively formulating constraint conditions of each interval according to basic operation data of the train and based on a preset constraint strategy, wherein the preset constraint strategy comprises an operation parameter constraint strategy and an operation speed constraint strategy, and the constraint conditions are used for constraining the operation parameters and the operation speed of the train; Setting a recommended electric power of a position where the pressure reduction is applied to each braking section and a recommended electric power of a position where the pressure reduction is released to each releasing section based on a preset first strategy, and setting a recommended running speed of the position where the pressure reduction is applied to each braking section and a recommended running speed of the position where the pressure reduction is released to each releasing section based on a preset second strategy; generating a control strategy of each braking section according to the recommended electric power and the recommended running speed of the position of the applied pressure reduction amount of each braking section, and generating a control strategy of each relieving section according to the recommended electric power and the recommended running speed of the relieving position of each relieving section; And under the condition that the constraint condition is triggered, determining a target interval of the train in the operation line according to the current position of the train, and controlling the current running state of the train according to a control strategy corresponding to the target interval.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises, The basic operation data comprise train traction characteristic data, electric brake characteristic data and air brake characteristic data of the train; the line data includes a slope value of the line and a curve value of the line.
3. The method of claim 1, wherein the operating parameter constraint strategy comprises: one or more of a traction force restraint strategy, an electric braking force restraint strategy, and an air braking force restraint strategy.
4. The method of claim 1, wherein the control strategy comprises: Air brake control strategy and electric brake control strategy.
5. The method of claim 4, wherein control parameters are included in the electric brake control strategy: the electrical force is kept for a minimum duration.
6. The method of claim 5, wherein controlling the current operating state of the train according to the control strategy corresponding to the target zone comprises: Determining the recommended electric power, the minimum holding time of the electric power and the recommended running speed of the train in the target interval; when the train reaches the position of the target interval, which is applied with the pressure reduction amount, the pressure reduction amount is applied to perform air braking, and the electric braking force of the train is controlled to be output in the recommended electric braking force at the same time, and the electric braking force is continuously output in the minimum holding time period; When the duration of the electric power application is not less than the minimum holding duration of the electric power, carrying out electric power adjustment operation to enable the train to run according to the recommended running speed; When the train reaches the relief position of the target section, train relief operation is performed and the electric power of the train is controlled to be output as the recommended electric power.
7. The method according to claim 1, wherein the method further comprises: And generating a control strategy for controlling the whole long and large downhill road section in the train operation line based on the control strategy of each section.
8. A control system for operating a heavy-duty train in a long downhill section, comprising: the data acquisition module is used for acquiring line data of a train operation line; The interval dividing module is used for determining a plurality of braking intervals and a plurality of relieving intervals according to the line data and a preset relieving gradient value, and respectively determining the pressure reduction application amount position of each braking interval and the relieving position of each relieving interval according to the plurality of braking intervals and the plurality of relieving intervals; The system comprises a constraint module, a control module and a control module, wherein the constraint module is used for respectively formulating constraint conditions of each interval according to basic operation data of a train and based on a preset constraint strategy, the preset constraint strategy comprises an operation parameter constraint strategy and an operation speed constraint strategy, and the constraint conditions are used for constraining the operation parameters and the operation speed of the train; the parameter setting module is used for setting the recommended electric power of the position where the pressure reduction is applied to each braking interval and the recommended electric power of the position where the pressure reduction is released to each releasing interval based on a preset first strategy, and setting the recommended running speed of the position where the pressure reduction is applied to each braking interval and the recommended running speed of the position where the pressure reduction is released to each releasing interval based on a preset second strategy; The control strategy generation module is used for generating a control strategy of each braking interval according to the recommended electric power and the recommended running speed of the position of the applied pressure reduction quantity of each braking interval, and generating a control strategy of each relieving interval according to the recommended electric power and the recommended running speed of the relieving position of each relieving interval; and the control module is used for determining a target interval of the train in the operation line according to the current position of the train under the condition that the constraint condition is triggered, and controlling the current running state of the train according to a control strategy corresponding to the target interval.
9. An electronic device, comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the manoeuvring control method of operation of a heavy haul train in a long downhill section as claimed in any of claims 1 to 7.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, realizes the steps of the method according to any one of claims 1 to 7.

Description

Control method and system for operation of heavy-duty train in long and large downhill section Technical Field The present disclosure relates to the field of train operation control, and in particular, to a method and system for controlling operation of a heavy-duty train in a long downhill section. Background Because of the high-efficiency and reliable characteristics, the heavy-duty railway transportation has great economic and social benefits, and becomes one of the main modes of energy transportation of coal, petroleum and the like in many countries, and the normalized running of2 ten thousand tons of heavy-duty trains is realized in China at present. On one hand, the characteristics of the topography of China are that the proportion of the railway in the mountain area and the long downhill area is large, the line environment is complex, on the other hand, the resources such as coal and the like are more concentrated in the western area, and the transportation demand is large. In order to ensure the operation safety of the heavy-duty train, the driving of the heavy-duty train has more severe precision and standard requirements than the driving of the common goods train, so that the research on the safe and stable operation strategy of the heavy-duty train in the long and large downhill section has important significance. When a heavy-load train runs in a continuously long and large downslope section, electric braking and air braking are matched for circulating braking, the train charging and discharging time is increased in a nonlinear way along with the train grouping length, the train is stressed in a complicated circulating braking speed regulation process under different line longitudinal sections, longitudinal force changes cause the longitudinal impulse of the train to be increased sharply, the failure frequency of a train hook buffer device is increased, and the safe and efficient development of heavy-load railway transportation is severely restricted. The operation quality of the heavy-duty train mainly depends on the driving experience and the operation level of locomotive crews under the existing heavy-duty railway transportation technical conditions in China, and in the actual driving process, a driver mainly operates according to train operation regulations and own experience, so that the locomotive crews are required to have rich operation experience and keep concentration continuously in operation, and especially when the locomotive crews run in a long and large downslope section, abnormal parking of the train is caused by carelessness, and even accidents are caused. The operation difficulty of the heavy-duty train in long and large downhill running has attracted attention of more domestic scholars, and the existing research is mainly divided into two types, namely single-target optimization and multi-target optimization. The method is characterized in that single-target optimization takes energy conservation as a target, takes a speed limit, a cycle brake application time interval, a quasi point and the like as constraint conditions to obtain a train operation energy consumption minimum speed curve, longitudinal impulse of a heavy-load train in the running process of a long and large downhill section is not considered in the solving process, the solving is complex, the model is ideal and is not easy to be applied to actual heavy-load train operation, multi-target optimization takes safety, stability, energy conservation and the like as optimization targets to solve the train operation speed curve, more students assume that the heavy-load train is provided with an electric control air brake system (electronically controlled pneumatic braking, ECP) for short, a multi-particle heavy-load train longitudinal dynamics model considering coupler force is established, and multi-target solving is carried out, wherein the longitudinal impulse of the heavy-load train can be improved to a large extent from the view of simulation effect, but the heavy-load train in China is not put into use in a large amount due to the current situation of cost problem. In the related art, the current state of development regarding ECP includes: the technical scheme is as follows: lin Xuan, wang Qingyuan, liu Jiangjiang, feng Xiaoyun. Periodic braking study in long downhill intervals for HXD 2-hauled freight trains [ J ]. University of southwest traffic university, 2017,52 (05): 859-868. The paper establishes an energy consumption optimal model meeting the cycle braking constraint of the freight train in the long and large downslope section, researches an electric-system-full-electric-system periodic braking strategy considering the utilization of regenerated energy based on a maximum principle, and reflects a better energy-saving effect through comparison of simulation cases. The technical disadvantages of the first technical scheme include: The periodic braking algorithm for the long and descending slope interval of