Rail transit section transport capacity evaluation method and system, device and medium

Abstract

The application discloses a rail transit section transport capacity evaluation method, which comprises the following steps: a section capacity dataset construction step, a section train diagram compression step, an interval capacity utilization region division step and a transport capacity evaluation parameter calculation step; for a rail vehicle operation section, a rail transit section capacity utilization analysis dataset is constructed by collecting data, the minimum interval time of adjacent rail vehicles running in the same operation interval is calculated, the key time point of interval capacity utilization is determined after the idle state of the train diagram is compressed and adjusted according to the minimum interval time, and the rail transit interval capacity utilization characteristic region is divided according to the key time point, and the interval capacity utilization characteristics, the interval transport capacity loss rate, the space-time capacity occupation time length and the unit passenger capacity utilization characteristics of the rail vehicle are calculated respectively, so that the evaluation of the rail transit section transport capacity is realized. The application also provides a rail transit section transport capacity evaluation system.

Description

Technical Field

[0001] The present application relates to the field of rail transportation, and in particular to a method, system, computer device, and computer-readable storage medium for evaluating the transportation capacity of a rail transportation section. Background Art

[0002] In recent years, my country's rail transit network has rapidly expanded. This has been achieved through optimized vehicle operation plans and schedules, particularly the operation of EMU trains with various speed levels, such as the Fuxing and Harmony trains, and various stopping patterns, similar to those used by high-speed rail. With the continued increase in passenger demand for rail transit systems like high-speed rail, my country's rail transit has achieved high-density operation, making it difficult to add trains in some sections. Differences in vehicle operating speeds and stopping plans result in heterogeneous vehicle operation within intervals, preventing vehicles from tracking each other within intervals at the minimum interval, resulting in a loss of interval capacity. A detailed analysis of the utilization and loss characteristics of interval capacity under different rail vehicle operation structures is crucial for further exploring rail transportation capacity and increasing traffic density.

[0003] In summary, it can be seen that there is an urgent need to build a new rail transit section transport capacity assessment method and system to solve the problems in traditional existing technologies that are unable to quickly determine section capacity occupancy and loss, and cannot quantitatively and accurately analyze the track section capacity occupancy and loss characteristics of different rail vehicles. At the same time, the existing technology is unable to provide in-depth transport capacity utilization analysis for optimizing rail transit operations. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method and system for evaluating the transportation capacity of a rail transit section.

[0005] In a first aspect, an embodiment of the present application provides a method for evaluating the transport capacity of a rail transit section, the method comprising:

[0006] Steps for constructing a section capacity utilization analysis dataset: For rail transit operating sections that include multiple inter-station intervals, collect rail transit basic data, operation diagram scale data, and operation diagram data to construct a rail transit section capacity utilization analysis dataset. An operating section is a vehicle operation section between stations where trains originate and terminate or connect to other lines.

[0007] Section operation diagram compression step: Based on the section capacity utilization analysis data set, the minimum interval time between adjacent rail vehicles running in the same station section is calculated, and the train operation diagram is compressed and adjusted to the capacity utilization idle state according to the minimum interval time;

[0008] The steps of dividing the interval capacity utilization characteristic area are as follows: based on the minimum interval time and the compressed operation diagram, the key time points of interval capacity utilization are determined, and the rail transit interval capacity utilization status areas are divided according to the key time points;

[0009] Calculation steps for transport capacity assessment parameters: Based on the divided interval capacity utilization status areas, calculate the interval capacity utilization characteristics, interval transport capacity loss rate, time and space capacity occupancy time and unit passenger capacity usage characteristics of rail vehicles respectively to realize the assessment of rail transit section transport capacity.

[0010] Preferably, the above-mentioned section operation diagram compression step further includes:

[0011] Minimum interval time calculation steps: Based on the segment capacity utilization analysis data set, the minimum departure interval time and the minimum arrival interval time of the minimum interval time of adjacent vehicles in each section are calculated respectively;

[0012] Compression determination step: compress the operation diagram in sequence and determine whether the interval between the vehicle to be compressed and the compressed vehicle meets the minimum departure interval and minimum arrival interval of each station in the section. If so, continue to perform the compression determination step; if not, adjust the vehicle's running time to obtain the minimum section occupancy time of the running vehicle;

[0013] Capacity limitation point identification steps: Based on the compressed operation diagram and the minimum occupancy time of the section, select the capacity-limited adjacent vehicles whose vehicle interval time at each station is equal to the minimum train interval time, and determine the arrival and departure time points of the capacity-limited adjacent vehicles as the section capacity limitation points.

[0014] Preferably, the above-mentioned interval capacity utilization area division step further includes:

[0015] Steps for determining key time points for capacity utilization: Determine key time points for interval capacity utilization in combination with the section capacity limit points. Key time points include: departure and entry signal processing time points, departure and entry signal closing time points, and the minimum departure or arrival interval time points with the following vehicles. Calculate the corresponding duration between each time point based on the key time points.

[0016] Steps for dividing interval capacity utilization status areas: Combine the key time points and duration of interval capacity utilization to divide the interval capacity utilization status areas into: capacity occupation area, capacity obstruction area and capacity loss area.

[0017] Preferably, the above-mentioned transport capacity assessment parameter calculation step further includes:

[0018] Regional capacity utilization characteristic calculation steps: based on the spatiotemporal areas of the capacity occupied area, the capacity obstruction area and the capacity loss area, respectively calculate the rail transit capacity occupancy characteristic, capacity obstruction characteristic and capacity loss characteristic;

[0019] Regional capacity loss rate calculation steps: Calculate the rail transit section capacity loss rate based on the capacity loss characteristic area;

[0020] The steps for calculating the space-time capacity occupancy of a train are as follows: the space-time area of ​​the capacity occupation region, the space-time area of ​​the capacity obstruction region, and the space-time area of ​​the capacity loss region are combined to cumulatively calculate the space-time area of ​​the capacity occupied by the vehicle in the section, and determine the average duration of the vehicle occupying the space-time capacity of the section;

[0021] Calculation steps for unit passenger capacity utilization characteristics: Based on the average duration of the vehicle's occupation of the space-time capacity of the section and the total number of passengers in the converted section, calculate the capacity utilization characteristics of the unit passenger in train transportation.

[0022] Preferably, the above-mentioned regional capacity loss rate calculation step further includes:

[0023]

[0024] Among them, q 损失 is the interval capacity loss rate, E is the interval set included in the rail vehicle section, is the set of capacity loss areas included in the interval, s a The spatiotemporal area of ​​the region divided by the capability utilization feature, d e Indicates the length of the interval between adjacent stations, t 有效 The effective operating time of the section.

[0025] Preferably, the above train space-time capacity occupancy calculation step further includes:

[0026] Among them, t 列车 is the average time length of the space-time capacity of the section occupied by the train, E is the set of sections passed by the high-speed train, is the regional set of train occupancy capacity, is the set of capacity loss areas caused by the train, The capacity obstruction area caused by the train is set, s a The spatiotemporal area of ​​the region divided by the capacity occupancy feature, s b The spatiotemporal area of ​​the region divided by the ability-impeding feature, s c The spatiotemporal area of ​​the region characterized by capacity loss, d e Indicates the length of the interval between adjacent stations.

[0027] Preferably, the above-mentioned step of calculating the unit passenger capacity usage characteristics further includes:

[0028]

[0029] Among them, t 列车 is the average length of time a train occupies the space-time capacity of a section; N is the converted number of people traveling the entire section.

[0030] In a second aspect, an embodiment of the present application provides a rail transit section transport capacity assessment system, which adopts the above rail transit section transport capacity assessment method, and the system includes:

[0031] Section Capacity Utilization Analysis Dataset Construction Module: For rail transit operating sections that include multiple inter-station intervals, this module collects rail transit basic data, operation diagram scale data, and operation diagram data to construct a rail transit section capacity utilization analysis dataset. An operating section is a vehicle operating section between stations where trains originate and terminate, or connect to other lines.

[0032] Section operation diagram compression module: Based on the section capacity utilization analysis data set, it calculates the minimum interval time between adjacent rail vehicles running in the same station section, and compresses the train operation diagram to adjust the capacity utilization idle state according to the minimum interval time;

[0033] Interval capacity utilization feature area division module: Based on the minimum interval time and the compressed operation diagram, it determines the key time points of interval capacity utilization and divides the rail transit interval capacity utilization status areas according to the key time points;

[0034] Transport capacity assessment parameter calculation module: Based on the divided interval capacity utilization status areas, the interval capacity utilization characteristics, interval transport capacity loss rate, time and space capacity occupancy time and unit passenger capacity usage characteristics of rail vehicles are calculated respectively to realize the transport capacity assessment of rail transit sections.

[0035] In a third aspect, an embodiment of the present application provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the rail transit section transport capacity assessment method as described in the first aspect above is implemented.

[0036] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the rail transit section transportation capacity assessment method as described in the first aspect above.

[0037] Compared with the related existing technologies, it has the following outstanding beneficial effects:

[0038] 1. This paper proposes a calculation method for quickly determining section capacity occupancy and loss. It constructs a rail transit section capacity utilization feature identification process that includes four spatiotemporal states: occupancy, obstruction, loss, and idleness. This method can quantitatively analyze the capacity utilization and loss characteristics of railway sections, providing technical support for improving the capacity utilization efficiency of rail transit, especially high-speed railways.

[0039] 2. The method of the present invention can be used to determine the spatiotemporal capacity occupancy status of each track section passed by a vehicle under a given rail transit train operation diagram, and support quantitative measurement of the capacity occupancy and loss characteristics caused by the operation of a certain train;

[0040] 3. The method of the present invention can quantitatively compare and analyze the capacity occupancy and loss characteristics of track sections under different vehicle operation structures, providing technical support for transport capacity utilization analysis for optimizing rail transit operation structures;

[0041] 4. The method of the present invention combined with rail transit ticketing data can calculate the capacity occupancy and loss characteristics of each vehicle per passenger, supporting quantitative comparative analysis of the operating efficiency of different vehicles and different stop structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0043] Figure 1 It is a flow chart of the section transport capacity evaluation method of the present invention;

[0044] Figure 2 This is a flow chart of the utilization characteristics and loss evaluation of the transport capacity of a high-speed railway section according to a specific embodiment of the present invention;

[0045] Figure 3 This is a functional structure diagram of a high-speed railway section transport capacity utilization characteristics and loss evaluation system according to a specific embodiment of the present invention;

[0046] Figure 4 It is a high-speed railway section capacity composition diagram after the train operation diagram is compressed according to a specific embodiment of the present invention;

[0047] Figure 5 2. It is a schematic diagram of key point settings for section capacity utilization after train timetable compression according to a specific embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of the time distribution of key points of interval capacity utilization after the train timetable is compressed according to a specific embodiment of the present invention;

[0049] Figure 7This is a schematic diagram of the distribution of section capacity utilization areas after the train timetable is compressed according to a specific embodiment of the present invention;

[0050] Figure 8 Schematic diagram of the section transport capacity evaluation system of the present invention;

[0051] Figure 9 A schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention.

[0052] In the above picture:

[0053] 10-segment capability utilization analysis data set construction module 20-segment operation diagram compression module

[0054] 30 Interval capacity utilization feature area division module 40 Transport capacity evaluation parameter calculation module

[0055] Processor; 82, memory; 83, communication interface; 80, bus. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0057] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can apply the present application to other similar scenarios based on these drawings without inventive effort. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0058] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0059] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0060] Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the technical field to which this application belongs. The words "one", "a", "the" and the like used in this application do not indicate a limit on quantity and may indicate the singular or plural. The terms "include", "comprise", "have" and any variations thereof used in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units that are inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The word "multiple" used in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0061] The present invention aims to provide a method for rapidly evaluating the utilization and loss characteristics of rail transit section transport capacity. By analyzing the interaction between front and rear rail vehicles in each section, the temporal and spatial occupancy status of the vehicles in the section is determined, and the duration of occupation, obstruction, and loss of capacity in each section is clarified. The temporal and spatial utilization characteristics of rail transit section transport capacity, as well as the loss of section capacity caused by the inability to utilize section transport capacity due to reasons such as vehicle speed differences and differences in stops, are quantitatively evaluated. This provides a new solution and technology for analyzing the problem of determining the loss of rail vehicle section capacity.

[0062] A rail transit section is a passenger section between two nodes with a large number of trains originating and terminating at the station, or with two or more trains entering from one end of the station, increasing the number of passenger trains within the section. The structure and number of trains operating within each section of a rail transit section remain essentially unchanged.

[0063] A section is the fixed track facility portion between two adjacent stations or depots on a rail line. Generally, a rail transit section consists of multiple sections.

[0064] Rail transit capacity refers to the maximum amount of transport tasks a rail transit system can complete per unit time or within a certain period, given given equipment conditions and transport organization models. Rail transit capacity depends not only on the number and performance characteristics of fixed equipment but also on the transport organization model that matches transport demand.

[0065] The transportation capacity utilization characteristics refer to the utilization status and degree of rail transit equipment in providing transportation services in actual operation. Currently, the capacity utilization rate is often used to describe the level of rail transit transportation capacity utilization.

[0066] Transport obstruction refers to the phenomenon that the leading vehicle prevents the following vehicle from running at the minimum tracking interval due to the different running times of the leading vehicle and the following vehicle in the section.

[0067] Transport capacity loss refers to the phenomenon that after the preceding vehicle departs, the following vehicle cannot depart according to the minimum train interval, resulting in the failure of transport capacity due to the superposition of running time differences of vehicles in the section due to speed differences, stops, etc., as well as the running time differences caused by the sequential occupation of the section by vehicles.

[0068] In the first aspect, the embodiment of the present application provides a method for evaluating the transport capacity of a rail transit section, such as Figure 1 As shown, the method includes:

[0069] Step S10 of constructing a section capacity utilization analysis data set: for a rail transit operation section including multiple inter-station intervals, collect rail transit basic data, operation diagram scale data, and operation diagram data to construct a rail transit section capacity utilization analysis data set. The operation section is a vehicle operation section between stations where trains originate and terminate or connect to other lines.

[0070] Section operation diagram compression step S20: Based on the section capacity utilization analysis data set, the minimum interval time between adjacent rail vehicles running in the same inter-station section is calculated, and the train operation diagram is compressed and adjusted to the capacity utilization idle state according to the minimum interval time;

[0071] Interval capacity utilization characteristic area division step S30: based on the minimum interval time and the compressed operation diagram, determining the key time points of interval capacity utilization, and dividing the rail transit interval capacity utilization status areas according to the key time points;

[0072] Transport capacity assessment parameter calculation step S40: Based on the divided interval capacity utilization status areas, the interval capacity utilization characteristics, interval transport capacity loss rate, time and space capacity occupancy time and unit passenger capacity usage characteristics of the rail vehicle are calculated respectively to realize the transport capacity assessment of the rail transit section.

[0073] Preferably, the above-mentioned section operation diagram compression step S20 further includes:

[0074] Minimum interval time calculation steps: Based on the segment capacity utilization analysis data set, calculate the minimum departure interval time and the minimum arrival interval time of adjacent vehicles in each segment respectively;

[0075] Compression determination step: compress the operation diagram in sequence and determine whether the interval between the vehicle to be compressed and the compressed vehicle meets the minimum departure interval and minimum arrival interval of each station in the section. If so, continue to perform the compression determination step; if not, adjust the vehicle's running time and determine the minimum section occupancy time of the running vehicle;

[0076] Capacity limitation point identification steps: Based on the compressed operation diagram and the minimum occupancy time of the section, select the capacity-limited adjacent vehicles whose vehicle interval time at each station is equal to the minimum train interval time, and determine the arrival and departure time points of the capacity-limited adjacent vehicles as the section capacity limitation points.

[0077] Preferably, the above-mentioned interval capability utilization area division step S30 further includes:

[0078] Steps for determining key time points for capacity utilization: Determine key time points for interval capacity utilization in combination with the section capacity limit points. Key time points include: departure and entry signal processing time points, departure and entry signal closing time points, and the minimum departure or arrival interval time points with the following vehicles. Calculate the corresponding duration between each time point based on the key time points.

[0079] Steps for dividing interval capacity utilization status areas: Combine the key time points and duration of interval capacity utilization to divide the interval capacity utilization status areas into: capacity occupation area, capacity obstruction area and capacity loss area.

[0080] Preferably, the transport capacity evaluation parameter calculation step S40 further includes:

[0081] Regional capacity utilization characteristic calculation steps: based on the time-division area of ​​the capacity occupied area, the capacity obstruction area and the capacity loss area, respectively calculate the rail transit capacity occupancy characteristic, the regional capacity obstruction characteristic and the regional capacity loss characteristic;

[0082] Calculation steps for regional capacity loss rate: Calculate regional capacity loss rate based on regional capacity loss characteristics;

[0083] The calculation steps for train space-time capacity occupancy are as follows: combining the capacity occupancy area, capacity obstruction area, and capacity loss area, cumulatively calculating the space-time capacity occupancy area of ​​the vehicle in the section, and determining the average duration of space-time capacity occupancy in the section;

[0084] Calculation steps for unit passenger capacity utilization characteristics: Based on the average duration of occupying the time and space capacity of the section and the number of passengers converted from the section to the full journey, calculate the capacity utilization characteristics of unit passengers in train transportation.

[0085] Preferably, the above-mentioned regional capacity loss rate calculation step further includes:

[0086]

[0087] Among them, q 损失 is the interval capacity loss rate, E is the interval set included in the rail vehicle section, is the set of capacity loss areas included in the interval, s a The spatial and temporal area of ​​the region divided by the capability utilization feature, d e Indicates the length of the interval between adjacent stations, t 有效 The effective operating time of the section.

[0088] Preferably, the above train space-time capacity occupancy calculation step further includes: Among them, t 列车 is the average time length of the space-time capacity of the section occupied by the train, E is the set of sections passed by the high-speed train, is the regional set of train occupancy capacity, is the set of capacity loss areas caused by the train, The capacity obstruction area caused by the train is set, s a The spatiotemporal area of ​​the region divided by the capacity occupancy feature, s b The spatiotemporal area of ​​the region divided by the ability-impeding feature, s c The spatiotemporal area of ​​the region characterized by capacity loss, d e Indicates the length of the interval between adjacent stations.

[0089] Preferably, the above-mentioned step of calculating the unit passenger capacity usage characteristics further includes:

[0090]

[0091] Among them, t 列车 is the average length of time that a train occupies the space-time capacity of a section; N is the converted number of passengers traveling the entire section.

[0092] The following describes in detail the specific embodiments of the present invention with reference to the accompanying drawings:

[0093] The specific embodiments of this invention focus on high-speed rail transportation scenarios, constructing a method and system for rapidly identifying the utilization and loss characteristics of high-speed rail section transport capacity. This solves the problem of quantitatively determining section transport capacity loss caused by factors such as train speed differences and station stops during high-speed rail operations. However, the invention is not limited to this and can also be applied to other rail transit modes, such as intercity rail, subways, and trams.

[0094] A high-speed railway section is a passenger section between two nodes with a large number of trains originating and terminating, or with two or more trains entering from one end of a station, increasing the number of passenger trains within the section. The structure and number of trains operating within each section of a high-speed railway section remain essentially unchanged.

[0095] Railway transport capacity refers to the maximum amount of transport tasks that a railway system can complete per unit time or within a certain period, given given equipment conditions and transport organization models. Railway transport capacity depends not only on the number and performance characteristics of fixed equipment installed, but also on the transport organization model that matches transport demand.

[0096] The transport capacity utilization characteristics refer to the utilization status and degree of railway equipment in providing transport services in actual operation. The capacity utilization rate is generally used to describe the level of railway transport capacity utilization.

[0097] Transport capacity loss refers to the phenomenon that after the preceding train departs, the following train cannot depart according to the minimum train interval time, resulting in the failure of transport capacity due to the superposition of running time differences in the section caused by speed differences, stops, etc., as well as the running time differences caused by the sequence of train section occupancy.

[0098] The specific embodiment of the present invention is as follows Figure 2 and functions Figure 3 As shown:

[0099] 1. Establish a high-speed rail section capacity analysis dataset

[0100] For high-speed railway sections, data such as sections, stations, station intervals, train tracking intervals, operation diagram scales, additional train departure time and minutes, additional train stop time and minutes, and train operation diagrams are collated to construct a high-speed railway section capacity utilization analysis dataset.

[0101] 2. Section train operation diagram compression and capacity limit point identification

[0102] Based on the actual train timetable data and timetable scale, section tracking interval time, timetable scale and other data, the minimum departure interval time and minimum arrival interval time of adjacent trains in each section are calculated in sequence; the train timetable is compressed in sequence according to the order of entering the section, and it is judged whether the interval time between the current train and the compressed train meets the minimum departure interval time and minimum arrival interval time of adjacent trains at each station in the section. If so, the compression judgment of the next train is carried out. If not, it is necessary to adjust the arrival and departure times of the trains in the compressed trains that do not meet the interval time requirements at each station; after all trains have completed compression, the minimum occupation time of the section by the train in operation is obtained.

[0103] According to the compressed train operation diagram, train pairs whose train interval time at each station is equal to the minimum train interval time are selected, and the arrival and departure operations of the trains at the station are the limiting points of the capacity of the capacity section.

[0104] 3. Determining the key time points for capacity utilization and dividing capacity utilization status into intervals

[0105] Due to the difference in speed, stops, etc., which cause the trains to have different running times in the section, as well as the superposition of running time differences caused by the sequential occupation of the train section, the preceding train and the following train run at the capacity-restricted station according to the minimum interval time, and the train interval time at other stations must be greater than the minimum train interval time. According to the functional relationship between the preceding train and the following train in occupying the section capacity, the spatiotemporal utilization status of the train section capacity is divided into four states: occupied, obstructed, lost, and idle; after the operation diagram is compressed, since the adjacent trains have been laid out according to the minimum train interval time, the current train operation diagram has no idle capacity, and the spatiotemporal utilization status of the railway section capacity can be divided into three states: occupied, obstructed, and lost. Figure 4 As shown, the section has 4 stations S1, S2, S3 and S4, and 3 trains L1, L2 and L3 are running. Figure 5 and Figure 7 As shown, area Q1 represents the actual occupancy of the train, and area Q1 is a trapezoidal area enclosed by four time points from π1 to π3 to π12 to π10; area Q2 represents the obstruction state of the train, and area Q2 is a triangular area enclosed by three time points from π3 to π4 to π12; in area Q2, due to the running time difference between the leading train and the following train, the leading train hinders the following train from running at the minimum tracking interval; area Q3 represents the loss state, and in area Q3, due to the leading train and the following train having already run at the minimum tracking interval time at another station, no additional train can be added between the leading train and the following train in the current compressed operation diagram, resulting in a loss of section capacity, and area Q3 is a trapezoidal area enclosed by four time points from π4 to π5 to π13 to π12.

[0106] (1) Determination of key time points for capacity utilization

[0107] The key time points for train interval capacity utilization analysis are determined by combining the minimum interval time of trains at each station, the timing of signal processing for receiving and dispatching trains, etc. The key time points for trains at the departure station include the departure signal processing time point, the departure signal unlocking time point, and the minimum departure interval time point with the following train; the key time points at the arrival station include the entry signal processing time point, the entry signal unlocking time point, and the minimum arrival interval time point with the following train. At capacity-constrained stations, some key time points overlap because some trains are arranged according to the minimum interval time. For example Figure 5 As shown, π2, π6, and π8 are the scheduled departure times of trains L1, L2, and L3 at station S1, respectively. The scheduled departure time specifically refers to the departure time specified in the timetable; π11, π14, and π17 are the scheduled arrival times of trains L1, L2, and L3 at station S2, respectively. The scheduled arrival time specifically refers to the arrival time specified in the timetable; π1, π5, and π7 are the departure signal processing time points of trains L1, L2, and L3 at station S1, respectively; π3, π7, and π9 are the arrival signal unlocking times of trains L1, L2, and L3 at station S1, respectively; π10, π13, and π16 are the arrival signal processing times of trains L1, L2, and L3 at station S2, respectively; π12, π15, and π18 are the arrival signal unlocking times of trains L1, L2, and L3 at station S2, respectively; and π4 is the minimum departure interval time of trains L1 and L2 at station S1 after considering the running time difference.

[0108] The setting of key time points for interval capacity analysis should meet the railway technical requirements, such as interval time, signal advance processing time, signal unlocking processing time, etc. Figure 6 As shown, t1, t6, and t8 are respectively the time for the advance processing of the departure signals of trains L1, L2, and L3 at station S1; t2, t7, and t9 are respectively the time for the unlocking and processing of the departure signals of trains L1, L2, and L3 at station S1; t11, t14, and t17 are respectively the time for the advance processing of the arrival signals of trains L1, L2, and L3 at station S2; t12, t15, and t18 are respectively the time for the unlocking and processing of the arrival signals of trains L1, L2, and L3 at station S2; t3 is the minimum processing time of trains L1 and L2 at station S1 Departure interval time; t4 is the departure interval time of trains L1 and L2 at station S1 after the timetable is compressed; t5 is the departure interval time of trains L2 and L3 at station S1 after the timetable is compressed; t13 is the arrival interval time of trains L1 and L2 at station S2 after the timetable is compressed; t19 is the arrival interval time of trains L2 and L3 at station S2 after the timetable is compressed; t16 is the minimum arrival interval time of trains L2 and L3 at station S2, and t10 and t20 are the duration of section capacity loss caused by the operation of trains L1 and L2.

[0109] (2) Interval capacity utilization status division

[0110] Combined with the key time points of the interval capacity utilization analysis, the interval capacity utilization status is divided. The interval capacity occupied by train L1 is from the time when the departure signal of train L1 entering the interval S1-S2 is processed to the time when the tail of train L1 passes through the interval S1-S2. The interval capacity occupied area of ​​train L1 is the trapezoidal area formed by the departure signal processing time point π1 when the train enters the interval S1-S2, the departure signal closing time point π3 after the train enters the interval S1-S2, the arrival signal triggering time point π10 when the train leaves the interval S1-S2, and the arrival signal closing time point π12 after the train leaves the interval S1-S2. The interval capacity obstruction area of ​​train L1 is the departure signal processing time point after the train enters the interval S1-S2. The triangle area formed by the signal closing time point π3, the arrival signal closing time point π12 after the train leaves the section S1-S2, and the minimum interval time point π4 between train L1 and the following train L2 is the obstruction area; the section capacity loss area of ​​train L1 is the minimum interval time point π4 between train L1 and the following train L2, the arrival signal closing time point π12 after train L1 leaves the section S1-S2, the departure signal triggering time point π5 when the following train L2 enters the section, and the arrival signal processing time point π13 when the following train L2 leaves the section S1-S2. The trapezoidal area formed by the train L1 and train L2 in the section represents the capacity loss area formed by train L1 and train L2. Figure 7 As shown, the capacity utilization status of the three trains in the S1-S2 section is divided into 6 areas, among which area Q1 is the section capacity occupied area of ​​train L1, area Q2 is the section capacity obstruction area where train L1 hinders the operation of train L2, area Q3 is the section capacity loss area, area Q4 is the section capacity occupied area of ​​train L2, area Q5 is the section capacity obstruction area where train L2 hinders the operation of train L3, and area Q6 is the section capacity occupied area of ​​train L2.

[0111] 4. Analysis of spatiotemporal capacity utilization and loss characteristics

[0112] Based on the key time points of interval capacity utilization analysis and the interval capacity utilization division area, the spatiotemporal capacity utilization and loss characteristics are calculated from the perspectives of interval, train and passenger.

[0113] (1) Spatial and temporal area of ​​the capability division area

[0114] Interval capacity utilization characteristics can be quantitatively described using the spatiotemporal area of ​​the interval capacity utilization partition, measured in km / s. Interval capacity utilization partitions are primarily triangular or trapezoidal. The spatiotemporal area of ​​these partitions is calculated using the area calculation formulas for triangles and trapezoids, where the height of the triangle and trapezoid represents the interval distance, and the base of the triangle and the upper and lower bases of the trapezoid represent the duration between the corresponding key time points.

[0115] The spatiotemporal area of ​​the capability occupation region of the capability occupation feature can be calculated according to formula (1):

[0116]

[0117] Where, Indicates the time it takes for the departure station to process the train departure signal in advance. Indicates the unlocking time of the departure signal of the train at the departure station. Indicates the time it takes for the arrival station to process the train arrival signal in advance. Indicates the time the departure station delays unlocking the train arrival signal, d e Indicates the length of the interval between adjacent stations.

[0118] The spatiotemporal area of ​​the capability-impeding region of the capability-impeding feature can be calculated according to formula (2):

[0119]

[0120] Where, t 最小间隔 Indicates the minimum departure / arrival interval time between adjacent trains, t 解锁 Indicates the unlocking time of the train departure / arrival signal, d e Indicates the length of the interval between adjacent stations.

[0121] The spatial and temporal area of ​​the capability loss region of the capability loss characteristic can be calculated according to formula (3):

[0122] s c =Δt a ×d e ⑶

[0123] Where Δt a represents the average loss duration of the capacity loss area, d e Indicates the length of the interval between adjacent stations.

[0124] (2) Calculation of interval capacity loss rate

[0125] The capacity loss rate refers to the ratio of the capacity lost in a certain period of time due to speed difference, station stop and other reasons to the effective capacity of the interval. Combined with the interval capacity utilization classification and the space-time area occupied by the capacity loss area, the interval capacity loss rate q 损失 It can be calculated according to formula (4).

[0126]

[0127] Where: E is the set of intervals included in the high-speed railway section, is the set of capacity loss areas included in the interval, s c The spatial and temporal area of ​​the region divided by the capability utilization feature, d eis the interval length between adjacent stations, t 有效 The effective operating time of the section.

[0128] (3) Calculation of train time and space capacity occupancy

[0129] Based on the actual capacity occupancy, obstruction, and loss status of trains in each section, the space-time area occupied by the train in the section is cumulatively calculated, and the average duration of the train's occupation of the section's space-time capacity is calculated in seconds. Considering that the loss of section capacity is caused by the operation of two adjacent trains, only half of the area of ​​the loss area is calculated when calculating the space-time capacity loss of a particular train. The average duration of the train's occupation of the section's space-time capacity can be calculated using formula (5).

[0130]

[0131] Where: E is the set of sections that the high-speed train passes through, is the regional set of train occupancy capacity, is the set of capacity loss areas caused by the train, The capacity obstruction area caused by the train is set, s a The spatiotemporal area of ​​the region divided by the capacity occupancy feature, s b The spatiotemporal area of ​​the region divided by the ability-impeding feature, s c The spatiotemporal area of ​​the region characterized by capacity loss, d e Indicates the length of the interval between adjacent stations.

[0132] (4) Calculation of unit passenger capacity utilization characteristics

[0133] The unit passenger capacity utilization characteristic represents the section capacity occupied by a unit passenger transported in a section, measured in seconds per person. The average passenger turnover of a section through which a train passes is calculated, converted to the number of passengers in the section throughout the entire journey. The unit passenger capacity utilization characteristic is then calculated based on the average occupancy time of the train's space-time capacity. The unit passenger capacity utilization characteristic can be calculated using Formula (6).

[0134]

[0135] Where: t 列车 is the average length of time a train occupies the space-time capacity of a section; N is the converted number of people traveling the entire section.

[0136] In the second aspect, the embodiment of the present application provides a rail transit section transport capacity evaluation system, which adopts the rail transit section transport capacity evaluation method as above. Figure 8 As shown, the system includes:

[0137] Section capacity utilization analysis data set construction module 10: for rail vehicle operation sections including multiple operation intervals, collect rail transit basic data, operation diagram scale data, and operation diagram data to construct rail transit section capacity utilization analysis data sets. Operation sections are vehicle operation sections between stations where trains originate and terminate or connect to other lines.

[0138] The section operation diagram compression module 20 calculates the minimum interval time between adjacent rail vehicles running in the same inter-station section based on the section capacity utilization analysis data set, and compresses and adjusts the train operation diagram to the capacity utilization idle state according to the minimum interval time;

[0139] The interval capacity utilization characteristic area division module 30 is used to determine the key time points of interval capacity utilization based on the minimum interval time and the compressed operation diagram, and to divide the rail transit interval capacity utilization status areas according to the key time points;

[0140] Transport capacity assessment parameter calculation module 40: Based on the divided interval capacity utilization status areas, the interval capacity utilization characteristics, interval transport capacity loss rate, time and space capacity occupancy time and unit passenger capacity usage characteristics of the rail vehicle are calculated respectively to realize the transport capacity assessment of the rail transit section.

[0141] In a third aspect, an embodiment of the present application provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the rail transit section transport capacity assessment method according to the first aspect described above is implemented.

[0142] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the rail transit section transportation capacity evaluation method as described in the first aspect above.

[0143] The computer device may include a processor 81 and a memory 82 storing computer program instructions.

[0144] The memory 82 may be used to store or cache various data files required for processing and / or communication, as well as possible computer program instructions executed by the processor 81 .

[0145] The processor 81 reads and executes computer program instructions stored in the memory 82 to implement any one of the rail transit section transport capacity assessment methods in the above embodiments.

[0146] In some embodiments, the computer device may further include a communication interface 83 and a bus 80. Figure 9 As shown, the processor 81, the memory 82, and the communication interface 83 are connected via a bus 80 and communicate with each other.

[0147] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0148] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A method for evaluating the transport capacity of a rail transit section, characterized in that: The method comprises: Steps for constructing a section capacity utilization analysis dataset: For rail transit operating sections that include multiple inter-station intervals, collect line basic data, operation diagram scale data, and operation diagram data to construct a rail transit section capacity utilization analysis dataset. The operating section is a vehicle operating section between stations where trains originate and terminate, or connect to other lines. The section operation diagram compression step includes: calculating the minimum interval time between adjacent rail vehicles running in the same inter-station section based on the section capacity utilization analysis data set, and performing idle state compression adjustment on the train operation diagram according to the minimum interval time; sequentially compressing the operation diagram, determining the minimum section occupancy time of the running vehicle, and screening capacity-limited adjacent vehicles whose vehicle interval time at each station is equal to the minimum train interval time based on the compressed operation diagram and the minimum section occupancy time, and determining the arrival and departure time points of the capacity-limited adjacent vehicles as the section capacity limit points; The step of dividing the interval capacity utilization characteristic area: determining the key time points of interval capacity utilization based on the minimum interval time and the compressed train operation diagram, and dividing the rail transit interval capacity utilization status area according to the key time points; The transport capacity evaluation parameter calculation step includes: calculating the interval capacity utilization characteristics, interval transport capacity loss rate, time and space capacity occupancy duration, and unit passenger capacity utilization characteristics of the rail vehicle based on the divided interval capacity utilization status areas, so as to realize the transport capacity evaluation of the rail transit section; The interval capability utilization area division step further includes: The step of determining the key time points for capacity utilization is as follows: determining the key time points for capacity utilization of the section based on the section capacity limit point, wherein the key time points include: the time points for handling departure and arrival signals, the time points for closing departure and arrival signals, and the time points for the minimum departure or arrival interval with the following vehicle, and calculating the corresponding time lengths between the various time points based on the key time points; The step of dividing the interval capacity utilization status area: combining the key time points and the duration of interval capacity utilization, the interval capacity utilization status area is divided into: capacity occupation area, capacity obstruction area and capacity loss area.

2. The rail transit section transport capacity assessment method according to claim 1, characterized in that: The section operation diagram compression step further comprises: Minimum interval time calculation step: based on the section capacity utilization analysis data set, respectively calculating the minimum departure interval time and the minimum arrival interval time of the minimum interval time of adjacent vehicles in each section; Compression determination step: sequentially compressing the operation diagram, determining whether the interval between the vehicle to be compressed and the compressed vehicle meets the minimum departure interval and the minimum arrival interval of each station in the section; if so, continuing the compression determination step; if not, adjusting the vehicle running time to determine the minimum section occupancy time of the running vehicle; Capacity limitation point identification step: Based on the compressed operation diagram and the minimum occupancy time of the section, the capacity-limited adjacent vehicles whose vehicle interval time at each station is equal to the minimum train interval time are screened, and the arrival and departure times of the capacity-limited adjacent vehicles are determined as the section capacity limitation points.

3. The rail transit section transport capacity assessment method according to claim 1, characterized in that: The transport capacity assessment parameter calculation step further comprises: Regional capacity utilization characteristic calculation step: calculating rail transit capacity occupancy characteristics, capacity obstruction characteristics, and capacity loss characteristics based on the spatiotemporal areas of the capacity occupancy area, the capacity obstruction area, and the capacity loss area; Regional capacity loss rate calculation step: calculating the rail transit section capacity loss rate based on the spatiotemporal area of ​​the capacity loss region; The train space-time capacity occupancy calculation step comprises: accumulating the space-time area of ​​the capacity occupied region, the space-time area of ​​the capacity obstruction region, and the space-time area of ​​the capacity loss region, and determining the average duration of the vehicle occupying the space-time capacity of the section; The step of calculating the unit passenger capacity utilization characteristics is as follows: based on the average duration of the space-time capacity of the section occupied by the vehicle and the total number of passengers in the converted section, the capacity utilization characteristics of the unit passenger in train transportation are calculated.

4. The rail transit section transport capacity assessment method according to claim 3, characterized in that: The regional capacity loss rate calculation step further includes: Among them, q 损失 is the interval capacity loss rate, E is the interval set included in the rail vehicle section, is the set of capacity loss areas included in the interval, s a The spatial and temporal area of ​​the region divided by the capability utilization feature, d e Indicates the interval length between adjacent stations, t 有效 The effective operating time of the section.

5. The rail transit section transport capacity assessment method according to claim 4, characterized in that: The train space-time capacity occupancy calculation step further includes: Among them, t 列车 is the average time length of the space-time capacity of the section occupied by the train, E is the set of sections passed by the high-speed train, is the regional set of train occupancy capacity, is the set of capacity loss areas caused by the train, The capacity obstruction area caused by the train is set, s a The spatiotemporal area of ​​the region divided by the capacity occupancy feature, s b The spatiotemporal area of ​​the region divided by the ability-impeding feature, s c The spatiotemporal area of ​​the region characterized by capacity loss, d e Indicates the length of the interval between adjacent stations.

6. The rail transit section transport capacity assessment method according to claim 4, characterized in that: The step of calculating the unit passenger capacity usage characteristics further includes: Among them, t 人 is the unit passenger capacity usage characteristic, t 列车 is the average length of time a train occupies the space-time capacity of a section; N is the converted number of people traveling the entire section.

7. A rail transit section transport capacity assessment system, using the rail transit section transport capacity assessment method according to any one of claims 1 to 6, characterized in that: The system comprises: Section Capacity Utilization Analysis Dataset Construction Module: For rail transit operating sections that include multiple inter-station intervals, this module collects rail transit basic data, operation diagram scale data, and operation diagram data to construct a rail transit section capacity utilization analysis dataset. The operation section is the vehicle operation section between stations where trains originate and terminate, or connect to other lines. A section operation diagram compression module calculates the minimum interval time between adjacent rail vehicles running in the same inter-station section based on the section capacity utilization analysis data set, and compresses and adjusts the vehicle idle state of the train operation diagram according to the minimum interval time; An interval capacity utilization feature area division module is configured to determine key time points for interval capacity utilization based on the minimum interval time and the compressed operation diagram, and to divide rail transit interval capacity utilization status areas according to the key time points; Transport capacity assessment parameter calculation module: Based on the divided interval capacity utilization status areas, the interval capacity utilization characteristics, interval transport capacity loss rate, time and space capacity occupancy time and unit passenger capacity usage characteristics of the rail vehicle are calculated respectively to realize the transport capacity assessment of the rail transit section.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the rail transit section transportation capacity evaluation method according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for evaluating the transportation capacity of a rail transit section as described in any one of claims 1 to 6 is implemented.

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