CN106347420B - A kind of offline adjustment drives curve method and system - Google Patents

Abstract

The embodiment of the present invention provides an offline driving curve adjustment method and system, based on the initial driving curve between the stations generated offline, divide the stations into sections, so that the speed limit and slope of the trains in each section remain the same; Select an adjustment interval in the interval; adjust and update the traction distance of the adjustment interval by using the preset adjustment amount of the traction distance; based on the last driving curve, obtain this traction distance according to the current traction distance of the adjustment interval Second adjusted driving curve. This embodiment will obtain the adjusted driving curve after offline processing by the method provided by this embodiment during the train running process, and can provide a relatively accurate driving curve for the driver's reference while meeting the safety, punctuality and energy-saving requirements during the train running process .

Description

A method and system for offline adjustment of driving curve

technical field

The invention relates to the field of communication technology, in particular to a method and system for offline adjustment of driving curves.

Background technique

As a transportation method with high transportation efficiency and low unit transportation cost, the railway transportation system carries the important task of transporting a large number of passengers and goods, and is the main artery of national economic development. The operation system of the railway passenger transport system mainly includes three levels: the operation plan and timetable, the reference operation curve between stations, and the train operation method. Each level cooperates and restricts each other to form the operation behavior of the train. my country has a vast territory. During the long-distance operation of main-line passenger trains, the line conditions, surrounding environment and train characteristics may change. When planning the operation diagram in advance and determining the reference strategy for operation and manipulation between train stations, there may be deviations between the conditions considered and the actual situation. As the main body of control during the operation of the train, the train driver will complete the driving work of the train according to the signals and instructions issued by the control center, and will also control the driving of the train during the operation according to the actual operating conditions and his own driving experience. Some adjustments are made to the strategy and operation behavior, and these adjustments generated by the driver's driving behavior will directly affect key indicators such as the operating time and energy consumption of the train.

Mainline railway traffic systems mostly use signal block (semi-automatic block, automatic block) as the main means of train control. However, for train control, it is far from enough to know whether the front section can be entered. The train driver's insufficient grasp of the real-time information and status of the train operation can easily lead to inappropriate judgments on train operating conditions and inappropriate driving. Manipulative behavior, which in turn leads to a decline in the overall quality of train operation. The Driver Advisory System (DAS: Driver Advisory System) came into being under such a background. In the commonly used train driver assistance systems, the commonly used driving curve adjustment methods are usually based on real-time acquisition and real-time online calculation and adjustment. The real-time online resources are wasted in the application, and its implementation will be limited when the real-time interruption occurs under special circumstances.

Contents of the invention

Embodiments of the present invention provide a method and system for offline adjustment of driving curves, and the present invention provides the following solutions:

Based on the initial driving curve between stations generated offline, the station is divided into intervals, so that the speed limit and slope of the train in each interval remain the same;

Select an adjustment interval in the interval;

Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount;

Based on the last driving curve, the current adjusted driving curve is obtained according to the current pulling distance in the adjustment interval.

According to the above-mentioned method of the present invention, comprising:

Accumulate the time change of each adjustment to obtain the sum of the time change of each adjustment;

Wherein, the current adjustment time is obtained based on the current adjusted driving curve;

The difference between this adjustment time and the last adjustment time is used as the time change of this adjustment;

Taking the time deviation value between the standard running time between stations stipulated in the train timetable and the initial running time obtained based on the initial driving curve as the total amount of time change;

Judging whether the sum of the time changes of each adjustment reaches the total amount of time changes;

If not, repeat the execution of the

Select an adjustment interval in the interval;

Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount;

Based on the previous driving curve, the current adjusted driving curve is obtained according to the current traction distance of the adjustment interval;

If so, stop executing the

Select an adjustment interval in the interval;

Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount;

Based on the last driving curve, the current adjusted driving curve is obtained according to the current pulling distance in the adjustment interval.

According to the above-mentioned method of the present invention, comprising:

Obtain the total energy consumption of this adjustment based on the current driving curve;

Select the interval that makes the largest difference between the total energy consumption of this adjustment and the total energy consumption of the previous adjustment as the non-first adjustment interval.

According to the above-mentioned method of the present invention, comprising:

Select the interval with the largest reference index in the interval as the first adjustment interval, wherein the ratio of the traction distance of each interval to the energy consumption of each interval is calculated as the reference index for selecting the first adjustment interval.

According to the above method of the present invention, the adjustment and updating of the traction distance in the adjustment interval by using the preset traction distance adjustment amount includes:

The difference between the traction distance before the adjustment of the adjustment interval and the preset adjustment amount of the traction distance is used as the traction distance of the adjustment interval this time.

According to another aspect of the present invention, a system for adjusting the driving curve offline is also provided, including:

Division module: it is used to divide the interval between stations based on the initial driving curve between stations generated offline, so that the speed limit and slope of the train in each interval remain the same;

Selection module: it is used to select an adjustment interval in the interval;

Adjustment module: it is used to adjust and update the traction distance in the adjustment interval described this time by adopting the preset traction distance adjustment amount;

Obtaining module: it is used to obtain the current adjusted driving curve according to the current traction distance in the adjustment interval based on the previous driving curve.

According to another aspect of the present invention, comprising:

Judgment module: it is used to judge whether the sum of the time variation of each adjustment reaches the total amount of time variation;

If not, repeat the execution of the

Select an adjustment interval in the interval;

Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount;

Based on the previous driving curve, the current adjusted driving curve is obtained according to the current traction distance of the adjustment interval;

If so, stop executing the

Select an adjustment interval in the interval;

Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount;

Based on the previous driving curve, the current adjusted driving curve is obtained according to the current traction distance of the adjustment interval;

Among them, accumulating the time variation of each adjustment to obtain the sum of the time variation of each adjustment;

Obtain the current adjustment time based on the current adjusted driving curve;

The difference between this adjustment time and the last adjustment time is used as the time change of this adjustment;

The time difference between the standard running time between stations specified in the train timetable and the initial running time obtained based on the initial driving curve is taken as the total amount of time change.

According to another aspect of the present invention, the selection module is specifically used for:

Obtain the total energy consumption of this adjustment based on the current driving curve;

The difference between the total energy consumption adjusted this time and the total energy consumption adjusted last time is the change in energy consumption this time;

Select the interval that makes the largest difference between the total energy consumption of this adjustment and the total energy consumption of the previous adjustment as the non-first adjustment interval.

According to another aspect of the present invention, the selection module is specifically used for:

Select the interval with the largest reference index in the interval as the first adjustment interval; wherein, the ratio of the traction distance of each interval to the energy consumption of each interval is calculated as the reference index for selecting the first adjustment interval.

According to another aspect of the present invention, the adjustment module is specifically used for:

The difference between the traction distance before the adjustment of the adjustment interval and the preset adjustment amount of the traction distance is used as the traction distance of the adjustment interval this time.

It can be seen from the technical solutions provided by the above-mentioned embodiments of the present invention that the embodiments of the present invention divide the intervals between stations based on the initial driving curves between stations generated offline, so that the speed limit and gradient of trains in each interval Keep the same; select an adjustment interval in the interval; adjust and update the traction distance of the adjustment interval by using the preset adjustment amount of traction distance; based on the last driving curve, according to the current traction distance of the adjustment interval Get the driving curve for this adjustment. This embodiment will obtain the adjusted driving curve after offline processing by the method provided by this embodiment during the train running process, and can provide a relatively accurate driving curve for the driver's reference while meeting the safety, punctuality and energy-saving requirements during the train running process .

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a processing flow chart of a method for offline adjustment of driving curves provided by Embodiment 1 of the present invention;

Figure 2 is a method for selecting an adjustment interval provided by Embodiment 1 of the invention;

FIG. 3 is a processing flowchart of a method for offline adjustment of driving curves provided by Embodiment 2 of the present invention;

FIG. 4 is a system block diagram of a system for offline adjustment of driving curves provided by Embodiment 3 of the present invention.

Detailed ways

In order to facilitate the understanding of the embodiments of the present invention, several specific embodiments will be taken as examples for further explanation below in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

Embodiment one

In this embodiment, the calculation model of the train driving curve needs to be established in advance, including:

Establish the motion expression in the process of train operation; among them, establish the mass equation according to the mass of the locomotive, the mass of the carriage and the mass of passengers, establish the resistance equation of the train according to the Davis equation and the speed of the train, and establish the gravity of the train on the train line in combination with the position of the train The component force equation of the direction; according to the force of the train in the direction of the line, an acceleration equation is established;

The basic operations based on speed and distance are discretely processed to obtain the iterative relational expression of train energy consumption;

An energy-saving target function is established based on the motion expression and an iterative expression of train energy consumption, wherein constraints are established on train speed, distance, running time, and gear according to actual train distance planning.

Specifically, the calculation model of the train driving curve is based on the classical Newtonian mechanics formula:

M＝M _L +ΣM _T +ΣM _P

R(v)＝M _L *w _l (v)+w _T (v)*Σ(M _P +M _T )

Among them, a is the sum acceleration of the train’s forces; F is the maximum traction force of the train related to the train’s traction gear and current speed; B is the maximum train traction force related to the train’s braking gear and current speed; The relevant component force of gravity in the direction of the line; R is the basic resistance of the train, which is related to the speed, and is given by the Davis equation; M is the total mass of the train, which is calculated from three parts: the mass of the locomotive, the mass of the carriage and the mass of passengers and obtained; L is the length of the train; g is the gradient before the slope; R _i is the radius of the curve. The operating conditions of the train in each section are converted into a traction-coasting pair or a coasting-braking pair.

Among them, the iterative relationship of intermediate variables is the kinematic relationship formula:

v _i+1 =v _i +a _i *Δt

E _i+1 ＝E _i +F(c _i ,v _i )*s _i

The energy saving objective function is:

n is the number of calculation points

The corresponding constraints are:

Velocity constraint: 0≤v _i ≤min(v _{max_s} ，v _{max_d} )

Distance constraint: s ₀ =0, sn=S, 0≤s _i ≤S

Running time constraints: t ₀ =0,t _n =T,0≤t≤T

Gear constraints: c _min ≤ c _i ≤ c _max , c∈Z

Based on the calculation model of the train driving curve and the iterative relationship between the calculation points, the train driving curve is obtained; the train driving curve is given in the form of a distance-speed point set, assuming that there is only one working condition switch in each interval, it can be The traction distance and gear position of each section are uniquely determined, that is, the traction distance of the train in each section is input, and the entire inter-station train driving curve can be obtained through the above calculation method. In the case of a given initial speed and traction distance in the interval, the position of the switching point of the working condition can be determined, and then the driving curve of the train in the interval can be determined. That is, the running curve of a train between stations can be uniquely determined by a set of {traction distance, traction gear} values.

This embodiment provides a processing flow of a method for offline adjustment of driving curves, as shown in Figure 1, including the following processing steps:

Step 11, based on the initial driving curve between the stations generated offline, divide the stations into intervals, so that the speed limit and slope of the train in each interval remain the same;

Specifically, in this embodiment, the section is divided according to the slope and the speed limit information, and as long as either the slope or the speed limit changes, it needs to be divided into a new section. As shown in Figure 2, the upper horizontal line segment in the figure describes each section of the speed limit, the lower horizontal line segment describes each section of the slope, and the dotted line draws each interval; the distance of each interval is actually the interval The maximum value of the inner traction distance, the adjustment value is used to adjust the traction distance in the adjustment interval, is the actual traction distance of the adjusted interval.

Step 12, selecting an adjustment interval in the interval;

Step 13, adjust and update the towing distance in the adjustment interval by using the preset towing distance adjustment amount; in this embodiment, use the difference between the towing distance before adjustment in the adjustment interval and the preset towing distance adjustment amount As the traction distance of the adjustment interval described this time. Wherein, the preset adjustment amount of the pulling distance is an adjustment amount set according to the actual operation situation, and the adjustment amount is smaller than the pulling distance of each adjustment interval.

Step 14 , based on the previous driving curve, the current adjusted driving curve is obtained according to the current towing distance in the adjustment interval.

Embodiment two

In this embodiment, it is still necessary to establish the calculation model of the train driving curve in advance, and its specific establishment process is the same as in Embodiment 1, so it will not be repeated here;

This embodiment provides a processing flow of a method for offline adjustment of driving curves, as shown in FIG. 3 , including the following processing steps:

Step 21, based on the initial driving curve between the stations generated offline, divide the stations into intervals, so that the speed limit and slope of the train in each interval remain the same;

Specifically, in this embodiment, the section is divided according to the slope and the speed limit information, and as long as either the slope or the speed limit changes, it needs to be divided into a new section. As shown in Figure 2, the upper horizontal line segment in the figure describes each section of the speed limit, the lower horizontal line segment describes each section of the slope, and the dotted line draws each section. It should be noted that the distance of each section is actually the maximum value of the pulling distance in the section; the following adjustment of the pulling distance using the adjustment amount in the adjustment section is the adjusted actual pulling distance of the section.

Step 202, selecting the first adjustment interval among the intervals;

In the selection of the adjustment interval, in principle, each adjustment needs to maximize energy saving. In practical applications, the selection method of the first adjustment interval is different from that of the non-first adjustment interval;

For the selection of the first adjustment interval, in this embodiment, the ratio of the traction distance of each interval to the energy consumption of each interval is used as a reference index for selecting the first adjustment interval; the reference index is used to reflect the energy-saving effect, so According to this reference index, select the interval with the greatest energy-saving effect as the first adjusted interval.

Among the intervals, the interval with the largest reference index is selected as the first adjustment interval.

After the first adjustment interval selection;

Step 23. Adjust and update the first traction distance in the adjustment interval using the preset traction distance adjustment amount; specifically, according to the method of step 13 in the first embodiment above, use the preset traction distance adjustment amount to adjust and update the first Adjust the traction distance of the interval; specifically, the difference between the traction distance before the adjustment of the adjustment interval and the preset traction distance adjustment amount is used as the traction distance of the adjustment interval this time. Wherein, the preset adjustment amount of the pulling distance is an adjustment amount set according to the actual operation situation, and the adjustment amount is smaller than the pulling distance of each adjustment interval.

Step 24. Based on the initial driving curve, obtain the driving curve for the first adjustment according to the updated traction distance of the first adjustment interval;

Step 25, judging whether the sum of the time changes adjusted each time reaches the total amount of time changes;

At this time, only the first adjustment is made, and the sum of the adjusted time changes is the time change of the first challenge;

Among them, the time change ΔT1 of the first adjustment is obtained;

Specifically, the first adjustment time T1 is obtained based on the first-time adjusted driving curve;

The method of obtaining the adjustment time based on the driving curve is:

in is the distance of each interval after the first adjustment, is the speed at the starting point of each interval after the first adjustment, is the speed at the end of each interval after the first adjustment;

Among them, the method of obtaining the initial running time based on the initial driving curve,

in is the initial distance of each interval, is the initial velocity at the start point of each interval, is the initial velocity at the end of each interval;

The difference between the first adjustment time and the initial running time obtained according to the initial driving curve is used as the first adjustment time change ΔT1; ΔT1=T1-T0;

The time deviation value between the standard running time between the stations stipulated in the train timetable and the initial running time obtained based on the initial driving curve is used as the total amount of time change Δt;

At this time, the sum of the time variation of the first adjustment ΔT=ΔT1;

Specifically, it is judged whether the sum ΔT of the first adjusted time variation is equal to the total amount of time variation Δt;

If not, then repeatedly perform the following steps 22 to 25;

Execute step 22 again, select a non-first adjustment interval in the interval;

When selecting an adjustment interval, in addition to the first adjustment interval, select the interval that makes the difference between the total energy consumption of this adjustment and the total energy consumption of the previous adjustment the largest as the non-first adjustment interval; Adjust the total energy consumption; the difference between the total energy consumption adjusted this time and the total energy consumption adjusted last time is the change in energy consumption this time.

At this time, a pre-computation is performed for all intervals except the first adjustment interval, and when each interval is assumed to be a pre-adjustment interval, the preset traction distance adjustment is used to adjust and update the traction distance of the pre-adjustment interval. Distance; based on the first adjusted driving curve, the adjusted driving curve of each pre-adjusted interval can be obtained, and the pre-adjusted total energy consumption E _i of this time is respectively obtained for each pre-adjusted interval; based on the first (last) adjusted driving curve Obtain the adjusted total energy consumption E of the first (last) adjustment; compare each pre-adjustment interval to obtain the difference ΔE _i between the pre-adjusted total energy consumption E _i of this time and the adjusted total energy consumption E of the first (last) adjustment,

ΔE _i =E _i -E; i represents the number of each pre-adjustment interval; select the pre-adjustment interval corresponding to the largest ΔE from the calculation result ΔE _i as the current adjustment interval.

Step 23. Adjust and update the traction distance of the adjustment interval by using the preset traction distance adjustment amount; specifically, according to the method of step 13 in the first embodiment above, adopt the preset traction distance adjustment Adjust and update the traction distance of the first adjustment interval; specifically, the difference between the traction distance before the adjustment interval adjustment and the preset traction distance adjustment amount is used as the traction distance of the adjustment interval this time. Wherein, the preset adjustment amount of the pulling distance is an adjustment amount set according to the actual operation situation, and the adjustment amount is smaller than the pulling distance of each adjustment interval.

Step 24, based on the driving curve adjusted for the first time, according to the updated traction distance of the adjustment interval described in this (second time), obtain the driving curve adjusted this time (second time);

Step 25, judging whether the sum of the time changes adjusted each time reaches the total amount of time changes;

After two adjustments, the sum of the time variation of each adjustment is the cumulative sum of the time variation of the first adjustment and the time variation of this (second) adjustment;

Wherein, the time variation ΔT2 of this (second) adjustment is acquired;

in is the initial distance of each interval, is the velocity at the first interval point of each initial interval, is the speed at the second interval point of each initial interval; obtain the adjustment time T2 based on the driving curve adjusted this time;

Use the difference between the current adjustment time T2 and the previous adjustment time T1 as the time change ΔT2 for this adjustment;

Accumulate the time change of each adjustment to obtain the sum ΔT of the time change of each adjustment;

Specifically, ΔT=ΔT1+ΔT2;

The time deviation value between the standard running time between the stations stipulated in the train timetable and the initial running time obtained based on the initial driving curve is used as the total amount of time change Δt;

Specifically, it is judged whether the sum ΔT of the first adjusted time variation is equal to the total amount of time variation Δt;

If not, repeat steps 22 to 24;

If yes, stop executing the steps 22 to 24.

Embodiment two

This embodiment provides a kind of off-line adjustment driving curve system, its specific implementation structure is shown in Figure 4, specifically can include the following modules:

Division module 21: it is used to divide the interval between stations based on the initial driving curve between the stations generated off-line, so that the speed limit and slope of the train in each interval remain the same;

Selection module 32: it is used to select an adjustment interval in the interval;

Adjustment module 33: it is used to adjust and update the traction distance in the adjustment interval described this time by adopting the preset traction distance adjustment amount;

Obtaining module 34: it is used to obtain the current adjusted driving curve according to the current pulling distance in the adjustment interval based on the last driving curve.

An off-line driving curve adjustment system provided in this embodiment includes:

Judgment module 35: it is used for judging whether the sum of the time variation of each adjustment reaches the total amount of time variation;

If not, repeat the execution of the

Select an adjustment interval in the interval;

Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount;

Based on the previous driving curve, the current adjusted driving curve is obtained according to the current traction distance of the adjustment interval;

If so, stop executing the

Select an adjustment interval in the interval;

Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount;

Based on the previous driving curve, the current adjusted driving curve is obtained according to the current traction distance of the adjustment interval;

Among them, accumulating the time variation of each adjustment to obtain the sum of the time variation of each adjustment;

Obtain the current adjustment time based on the current adjusted driving curve;

The difference between this adjustment time and the last adjustment time is used as the time change of this adjustment;

The time difference between the standard running time between stations specified in the train timetable and the initial running time obtained based on the initial driving curve is taken as the total amount of time change.

The selection module 32 is specifically used for:

Obtain the total energy consumption of this adjustment based on the current driving curve;

The difference between the total energy consumption adjusted this time and the total energy consumption adjusted last time is the change in energy consumption this time;

Select the interval that makes the largest difference between the total energy consumption of this adjustment and the total energy consumption of the previous adjustment as the non-first adjustment interval.

The selection module 32 is specifically used for:

Select the interval with the largest reference index in the interval as the first adjustment interval; wherein, the ratio of the traction distance of each interval to the energy consumption of each interval is calculated as the reference index for selecting the first adjustment interval.

The adjustment module 33 is specifically used for:

The difference between the traction distance before the adjustment of the adjustment interval and the preset adjustment amount of the traction distance is used as the traction distance of the adjustment interval this time. The specific process of offline adjustment of the driving curve using the system of the embodiment of the present invention is similar to the foregoing method embodiment, and will not be repeated here.

In summary, the embodiment of the present invention divides the stations into intervals based on the initial driving curves between the stations generated offline, so that the speed limit and slope of the trains in each interval remain the same; interval; adjust and update the traction distance of the adjustment interval by using the preset adjustment amount of traction distance; and obtain the adjusted driving curve according to the current traction distance of the adjustment interval based on the previous driving curve. This embodiment will obtain the adjusted driving curve after offline processing by the method provided by this embodiment during the train running process, and can provide a relatively accurate driving curve for the driver's reference while meeting the safety, punctuality and energy-saving requirements during the train running process .

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of an embodiment, and the modules or processes in the accompanying drawing are not necessarily necessary for implementing the present invention.

It can be seen from the above description of the implementation manners that those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in storage media, such as ROM/RAM, disk , CD, etc., including several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods described in various embodiments or some parts of the embodiments of the present invention.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device or system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, refer to part of the description of the method embodiments. The device and system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, It can be located in one place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (8)

1. A driving curve method for off-line adjustment, characterized in that, comprising: Based on the initial driving curve between stations generated offline, the station is divided into intervals, so that the speed limit and slope of the train in each interval remain the same; Select an adjustment interval in the interval; Adjust and update the traction distance in the adjustment interval described this time by using the preset traction distance adjustment amount; Based on the previous driving curve, the current adjusted driving curve is obtained according to the current traction distance of the adjustment interval; The adjustment time is obtained based on the driving curve of this adjustment, the difference between the adjustment time and the previous adjustment time is used as the time change of this adjustment, and the time change of each adjustment is accumulated to obtain the time change of each adjustment The sum of the amount, the time deviation value between the standard running time between the stations stipulated in the train timetable and the initial running time obtained based on the initial driving curve is used as the total amount of time change, and it is judged whether the sum of the time change amount adjusted each time is Amount of time change achieved; If not, repeat the selection of the adjustment interval in the interval, adjust and update the traction distance of the adjustment interval by using the preset adjustment amount of traction distance, based on the last driving curve, according to the adjustment interval Get the adjusted driving curve for this current towing distance; If so, stop executing the selection of the adjustment interval in the interval, adjust and update the traction distance of the adjustment interval by using the preset adjustment amount of traction distance, based on the driving curve of the last time, according to the adjustment interval of the adjustment interval. The towing distance of this time obtains the driving curve adjusted this time. 2. A method for offline adjustment of driving curve according to claim 1, wherein said selecting an adjustment interval in said interval comprises: Obtain the total energy consumption of this adjustment based on the current driving curve; Select the interval that makes the largest difference between the total energy consumption of this adjustment and the total energy consumption of the previous adjustment as the non-first adjustment interval. 3. A kind of offline adjustment driving curve method according to claim 2, characterized in that, selecting an adjustment interval in the interval includes: Select the interval with the largest reference index in the interval as the first adjustment interval, wherein the ratio of the traction distance of each interval to the energy consumption of each interval is calculated as the reference index for selecting the first adjustment interval. 4. The method for adjusting the driving curve off-line according to claim 3, wherein the adjusting and updating the traction distance in the adjustment interval by using the preset traction distance adjustment amount comprises: The difference between the traction distance before the adjustment of the adjustment interval and the preset adjustment amount of the traction distance is used as the traction distance of the adjustment interval this time. 5. An offline adjustment driving curve system, characterized in that it comprises: Division module: it is used to divide the interval between stations based on the initial driving curve between stations generated offline, so that the speed limit and slope of the train in each interval remain the same; Selection module: it is used to select an adjustment interval in the interval; Adjustment module: it is used to adjust and update the traction distance in the adjustment interval described this time by adopting the preset traction distance adjustment amount; Acquisition module: it is used to obtain the driving curve adjusted this time according to the current traction distance of the adjustment interval based on the previous driving curve; Judgment module: it is used to judge whether the sum of the time variation of each adjustment reaches the total amount of time variation; if not, then repeat the process of selecting an adjustment interval in the interval, using the preset traction distance adjustment amount to adjust and Update the traction distance of the adjustment interval this time, based on the last driving curve, obtain the driving curve adjusted this time according to the current traction distance of the adjustment interval; if so, stop performing the selection in the interval. Adjust the interval, adjust and update the traction distance of the adjustment interval by using the preset adjustment amount of the traction distance, and obtain the adjusted driving curve according to the current traction distance of the adjustment interval based on the previous driving curve; in, The adjustment time is obtained based on the driving curve of this adjustment, the difference between the adjustment time and the previous adjustment time is used as the time change of this adjustment, and the time change of each adjustment is accumulated to obtain the time change of each adjustment The sum of the amount, the time deviation value between the standard running time between stations stipulated in the train timetable and the initial running time obtained based on the initial driving curve is taken as the total amount of time change. 6. A kind of offline adjustment driving curve system according to claim 5, characterized in that, the selection module is specifically used for: Obtain the total energy consumption of this adjustment based on the current driving curve; The difference between the total energy consumption adjusted this time and the total energy consumption adjusted last time is the change in energy consumption this time; Select the interval that makes the largest difference between the total energy consumption of this adjustment and the total energy consumption of the previous adjustment as the non-first adjustment interval. 7. A kind of off-line adjustment driving curve system according to claim 6, characterized in that, the selection module is specifically used for: Select the interval with the largest reference index in the interval as the first adjustment interval; wherein, the ratio of the traction distance of each interval to the energy consumption of each interval is calculated as the reference index for selecting the first adjustment interval. 8. A system for adjusting the driving curve offline according to claim 7, wherein the adjustment module is specifically used for: The difference between the traction distance before the adjustment of the adjustment interval and the preset adjustment amount of the traction distance is used as the traction distance of the adjustment interval this time.