A method of calculating the capacity of an interval

Abstract

The application discloses a method for calculating interval passing capacity, which comprises the following steps: using a virtual marshalling technology to drive a single-line railway; when a virtual marshalling train is composed of a single-unit train, deducing a calculation formula of a train marshalling diagram cycle of an interval T s周（c编） , calculating the diagram cycle according to the calculation formula, and calculating the interval passing capacity according to a basic formula of the interval passing capacity. The application realizes a method for calculating interval passing capacity improvement without rebuilding a double-line railway and without adding too many trackside devices.

Description

Technical Field

[0001] This invention relates to the field of heavy-haul freight railways, and in particular to a method for calculating the throughput capacity of a section under the condition of virtual marshalling technology for a dedicated single-track heavy-haul freight railway for coal enterprises. Background Technology

[0002] Some dedicated railway lines for enterprises were initially built as single-track lines, often using inter-station block signaling. With economic development, the capacity of these single-track railway sections has become nearly saturated, unable to meet the ever-increasing demand for freight.

[0003] Currently, many coal enterprises' dedicated single-track heavy-haul freight railways are limited by the number of tracks at intermediate stations, so they only use virtual marshalling technology in the direction of loaded cars, while the direction of empty cars still uses the inter-station block system, with empty and loaded cars running in pairs.

[0004] When a virtual trainset (assuming n train units) operates in the loaded direction, the same number of empty trains (n ​​train units) should operate in the reverse direction within one timetable cycle. Due to the influence of the number of tracks at intermediate stations (all with 2 tracks), the reverse empty train tracking interval can only be determined after drawing timetables for multiple adjacent sections. Drawing timetables for multiple sections involves complex conditions, is time-consuming, and is difficult for non-professionals to do. Summary of the Invention

[0005] The purpose of this invention is to provide a method for calculating the throughput capacity of a railway section. Specifically, based on the virtual marshalling technology used in the direction of loaded trains on a dedicated single-track heavy-haul freight railway for coal enterprises, this method calculates the throughput capacity of a section under the condition that loaded trains pass through without stopping, while empty trains stop to yield to loaded trains. This transportation organization method can significantly improve the throughput capacity of a section without modifying double-track railways or adding excessive trackside equipment. This invention aims to find a method for calculating transport capacity under this transportation organization.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] A method for calculating the throughput capacity of a section includes: operating trains using virtual train formation technology on a single-track railway;

[0008] When a virtual train formation is When a train unit is formed, then the s section... The cycle of the first batch of operation charts is The following formula is used for calculation:

[0009] when hour:

[0010]

[0011] when hour:

[0012] In the formula, , The station interval time occupied by trains going down and up is divided into minutes; , The time allotted for freight trains traveling between the northbound and southbound sections, excluding additional time for starting and stopping; The number of intervals contained in the current segment, and ; Within a virtual train formation, the tracking interval between two trains in the up-direction group;

[0013] The interval throughput capacity is calculated by combining the basic formulas for the running chart period and the interval throughput capacity.

[0014] Optionally, the interval throughput capacity The following formula is used for calculation:

[0015] when hour:

[0016]

[0017] when hour:

[0018] .

[0019] Optionally, it also includes: calculating the segment throughput capacity in conjunction with the running chart cycle.

[0020] Optionally, in Under the condition of column one, the throughput capacity of the section is: .

[0021] Optionally, virtual train formation technology is used for single-track railways, and the problems arising during the process of using this virtual train formation technology are abstracted into an operation organization model and a line model; and on this basis, the section throughput capacity of a certain section is calculated.

[0022] Optionally, the operational organization model is as follows:

[0023] Both directions of traffic use single-track block signaling between stations;

[0024] Assume the upward direction is the direction of loaded vehicles and the downward direction is the direction of empty vehicles;

[0025] Heavy vehicles can pass through without stopping, and empty vehicles must yield to heavy vehicles.

[0026] The sum of the travel minutes for both the up and down directions in any given interval is greater than the travel minutes for the down direction in the adjacent interval.

[0027] Empty vehicles will be given priority even when parked, without considering other operational factors;

[0028] For ease of calculation, the time interval for empty vehicle parking does not include the additional time interval for starting and stopping.

[0029] The additional time for starting and stopping is included in the station interval time occupied by the stop;

[0030] The station interval time occupied by down-going and up-going trains is the same throughout the entire section;

[0031] Trains running in both directions operate in pairs.

[0032] Optionally, the route model is as follows: trains can depart from both ends of the section without being limited by the number of tracks, as long as the tracking interval is met; intermediate stations are all small stations with 2 tracks.

[0033] On the other hand, the present invention also provides an electronic device including a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, it implements the method described above.

[0034] In another aspect, the present invention also provides a readable storage medium storing a computer program, which, when executed by a processor, implements the method described above.

[0035] This invention has at least one of the following technical effects:

[0036] This invention provides a clear formula for calculating the throughput capacity of a section through operational diagram analysis. Only some basic data within the section are needed to quickly calculate the throughput capacity of a specified section under different train formations within a virtual configuration, and the calculated results are rapid and accurate.

[0037] This solves the following problem: When using existing formulas for calculation, if a single-track railway adopts virtual marshalling technology, due to track limitations at intermediate stations and the use of inter-station block signaling, the train tracking interval for empty trains cannot be directly determined. A timetable drawing method is needed to calculate this interval. Timetable drawing requires professionals to draw manually (prone to errors) or use specialized tools (requiring specific software and data configuration), which is labor-intensive and difficult for the average person to operate.

[0038] Although this method is designed to solve the problem of calculating the throughput capacity of a section under virtual formation conditions on a dedicated single-track freight railway for enterprises, its principles are also applicable to solving the problem of calculating the throughput capacity of a single-track section under similar train operation organization conditions for national railways and other enterprise railways or dedicated lines, including freight and passenger lines. Attached Figure Description

[0039] Figure 1 This is a flowchart illustrating a method for calculating the throughput capacity of a section according to an embodiment of the present invention.

[0040] Figure 2 Provided for an embodiment of the present invention An auxiliary schematic diagram for calculating the cycle of a single column in a given interval;

[0041] Figure 3 Provided for an embodiment of the present invention Auxiliary diagram for calculating the cycle of the running chart in two columns per interval;

[0042] Figure 4 Provided for an embodiment of the present invention Auxiliary diagram for calculating the cycle of the running chart in a 3-column sequence within an interval;

[0043] Figure 5 Provided for an embodiment of the present invention A schematic diagram illustrating the intermediate process of cycle calculation for a 3-column interval;

[0044] Figure 6 Provided for an embodiment of the present invention A schematic diagram for calculating the cycle of the running chart of a 4-column interval. Detailed Implementation

[0045] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a method for calculating the throughput capacity of an interval according to the present invention. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the embodiments of the present invention. Please refer to the drawings to make the objectives, features, and advantages of the present invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the present invention, should still fall within the scope of the technical content disclosed in the present invention.

[0046] This embodiment is a calculation method for calculating the throughput capacity of a section based on the virtual marshalling technology used in the direction of loaded cars on a dedicated single-track heavy-haul freight railway for coal enterprises. Under the conditions that loaded cars pass through without stopping and empty cars stop to let loaded cars pass, this embodiment is based on the virtual marshalling technology used in the direction of loaded cars.

[0047] like Figure 1As shown, this embodiment provides a method for calculating the throughput capacity of a section, which includes: using virtual train formation technology to operate single-track railways; when a virtual train formation consists of c unit trains, then a certain interval The cycle of the first batch of operation charts is The following formula is used for calculation:

[0048] when hour:

[0049]

[0050] when hour:

[0051]

[0052] In the formula, , The station interval time occupied by trains going down and up is divided into minutes; , This refers to the running time of freight trains traveling in both directions, excluding additional time for starting and stopping. : The number of intervals contained in the current segment; Within a virtual train formation, the tracking interval between two trains in the up-direction group; : consecutive interval numbers starting from the first interval in the upward direction ; Number of train pairs within a timetable cycle.

[0053] The interval throughput capacity is calculated by combining the basic formulas for the running chart period and the interval throughput capacity.

[0054] To better understand the above embodiments, the following examples are provided:

[0055] Single-track railways that use virtual train formation technology, such as dedicated railways for coal enterprises, generally have some common characteristics, such as loaded trains passing through without stopping, empty trains yielding to loaded trains, intermediate stations generally being two-track stations, and terminal stations being large multi-track stations (the impact of the number of tracks at terminal stations on the throughput capacity of the section can be ignored).

[0056] Before introducing this invention, the problem to be solved will be abstracted into the following model, and the interval throughput capacity of a certain section will be calculated based on this model.

[0057] Operational model: Single-track block signaling is used for both directions. Assume the upward direction is for loaded trains and the downward direction is for unloaded trains. Loaded trains pass through without stopping, while unloaded trains yield to loaded trains.

[0058] The sum of the travel minutes for both the up and down directions in any given interval is greater than the travel minutes for the down direction in the adjacent interval.

[0059] All empty train stops are considered yielding, without taking into account other operational factors. For ease of calculation, the running time for empty train stops does not include the additional time for starts and stops. The additional time for starts and stops is included in the station interval time occupied by the train stopping at the station. The station interval time occupied by down-bound and up-bound trains is the same throughout the entire section. Up-bound and down-bound trains run in pairs.

[0060] Line model: Trains can depart from both ends of this section without being limited by the number of tracks, as long as the tracking interval is met. All intermediate stations are small stations with two tracks.

[0061] The parameter settings are as follows:

[0062] , : The station interval time occupied by trains heading down (empty direction) and up (loaded direction), in minutes; (generally, each station The same applies to all stations. same).

[0063] , The running time of freight trains in the downhill (empty direction) and uphill (loaded direction) sections does not include necessary additional time for starting and stopping.

[0064] : The number of intervals contained in the current segment.

[0065] The intervals are numbered consecutively, starting from the first interval, according to the direction of travel of the loaded train, with the numbering beginning with 1. ).

[0066] The number of trains that make up a virtual train formation; a column.

[0067] Within the virtual train formation, the tracking interval between two trains in the direction of the loaded train is specified in minutes.

[0068] : The number of train pairs within the timetable cycle.

[0069] We will use a section with 4 stations and 3 intervals as an example to illustrate this embodiment.

[0070] The calculation of the runtime cycle under different virtual grouping conditions is as follows:

[0071] like Figure 2As shown, one trainset is a virtual trainset consisting of one unit train, which is the existing train operation organization mode that does not use virtual coupling technology. One unit train is represented by one trainset.

[0072] Depend on Figure 2 It can be known that a certain The cycle of the 1-column 1-code operation chart in the interval is :

[0073] (1)

[0074] like Figure 3 As shown, a virtual train consists of two units (two trains make up one virtual train). Figure 3 It can be known that a certain The cycle of the 2-column 1-code operation chart in the interval is :

[0075] (2)

[0076] As can be seen from the running diagram, This needs to be calculated separately. As can be seen from the following operational graph:

[0077] (3)

[0078] (4)

[0079] (5)

[0080] (6)

[0081] like Figure 4 As shown, a virtual train consists of 3 train units per formation (a virtual train formation is composed of 3 unit trains). Figure 4 It can be known that a certain The cycle of the 3-column 1-compilation chart for the interval is :

[0082] (7)

[0083] (8)

[0084] (9)

[0085] (10)

[0086] (11)

[0088] like Figure 5As shown, through the above calculations and graphical analysis, it can be concluded that...

[0089] (12)

[0090] The calculation can be transformed into finding the time length represented by the base of the large triangle shown by the dashed line. This can be seen from the running graph. that is interval, interval, The sum of the travel times of the trains going up and down the three sections.

[0091] One trainset (a virtual trainset consisting of...) Based on the above derivation process and graphical analysis, the timetable cycle of a certain train unit (comprising multiple train units) can be derived. interval The cycle of the 1st column's operation chart is The calculation formula is as follows:

[0092] when (Right now )hour:

[0093] (13)

[0094] when (Right now )hour:

[0095] (14)

[0096] when (Right now When trains are grouped into sets of 4 (a virtual trainset consists of 3 unit trains), the timetable cycle calculation diagram is as follows: Figure 6 As shown.

[0097] Calculate the throughput capacity of the interval: based on the basic formula: ,in, N This indicates the throughput capacity of a parallel running chart interval, either in pairs or columns. 1440 - day / night time, in minutes. Indicates the cycle of the running chart, in minutes. This indicates the number of train pairs or trains within a timetable cycle. The time can be omitted.

[0098] when (Right now )hour:

[0099] (15)

[0100] when Right now )hour:

[0101] (16)

[0102] Calculate the throughput capacity of the section: One trainset (a virtual trainset consisting of...) Under the condition of (comprising a series of unit trains), the throughput capacity of this section is:

[0103] (17)

[0104] When single-track railways adopt virtual train formation technology, multiple unit trains in one direction can be treated as a single virtual train formation and run without stopping, which can overcome the limitations of intermediate station tracks and greatly improve throughput. However, existing standards do not contain calculation formulas for this type of train operation organization mode (one direction uses virtual train formation technology and runs without stopping, while the other direction uses inter-station block system).

[0105] When using existing formulas for calculations, for single-track railways employing virtual train formation technology, the train tracking interval cannot be directly determined due to track limitations at intermediate stations and the use of inter-station block signaling in the direction of empty trains. A timetable drawing method is required for calculation. Timetable drawing requires manual drawing by professionals (prone to errors) or specialized tools (requiring specific software and data configuration), resulting in a large workload and making it difficult for the average person to operate.

[0106] This embodiment provides a clear formula for calculating the throughput capacity of a section through operational diagram analysis and formula derivation. Only some basic data within the section is needed; the throughput capacity of a specified section under different train formations within a virtual configuration can be quickly calculated using purely mathematical methods. This is both rapid and accurate.

[0107] Although this algorithm is designed to solve the problem of calculating the throughput capacity of a section under the virtual formation conditions of a dedicated single-track freight railway for enterprises, its principle is also applicable to the calculation of the throughput capacity of a single-track section under the similar train operation organization conditions of national railways and other enterprise railways or dedicated lines for freight and passenger transport.

[0108] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0109] It should be noted that the apparatus and methods disclosed in the embodiments herein can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments herein. In this regard, each block in a flowchart or block diagram may represent a module, program, or part of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system to perform the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0110] In addition, the functional modules in the various embodiments of this article can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0111] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method of calculating the capacity of an interval, characterized in that, include: Virtual train formation technology is used for single-track railways. When a virtual marshalling train is composed of column train units, the s interval of the column train unit is calculated by the following formula: the column train unit is calculated by the following formula: When time: When Time: wherein, , is the interval time between stations occupied by the down and up trains, seconds; , is the interval running time of the down and up freight trains, and does not include the additional time of starting and stopping, seconds; : the number of intervals contained in the current section, and ; : the tracking interval time between two trains in the up direction group within the virtual marshalling. The interval throughput capacity is calculated by combining the basic formulas for the running chart cycle and the interval throughput capacity. The interval through capacity The interval through capacity is calculated using the following formula: When Time: ； When Time: 。 2. The method of claim 1, wherein, Also includes: The throughput capacity of the section is calculated based on the aforementioned operating cycle.

3. The method for calculating the throughput capacity of an interval as described in claim 1, characterized in that, In The segment has a throughput capacity of: .

4. The method for calculating the throughput capacity of an interval as described in claim 1, characterized in that, The virtual train formation technology is used for single-track railways, and the problems arising during the process of using this virtual train formation technology are abstracted into an operation organization model and a line model; and on this basis, the section throughput capacity is calculated.

5. The method for calculating the throughput capacity of an interval as described in claim 4, characterized in that, The operational organization model is as follows: Both directions of traffic use single-track block signaling between stations; Assume the upward direction is the direction of loaded vehicles and the downward direction is the direction of empty vehicles; Heavy vehicles can pass through without stopping, and empty vehicles must yield to heavy vehicles. The sum of the travel minutes for both the up and down directions in any given interval is greater than the travel minutes for the down direction in the adjacent interval. Empty vehicles will be given priority even when parked, without considering other operational factors; For ease of calculation, the time interval for empty vehicle parking does not include the additional time interval for starting and stopping. The additional time for starting and stopping is included in the station interval time occupied by the stop; The station interval time occupied by down-going and up-going trains is the same throughout the entire section; Trains running in both directions operate in pairs.

6. The method for calculating the throughput capacity of an interval as described in claim 5, characterized in that, The route model is as follows: trains can depart from both ends of the section without being limited by the number of tracks, as long as the tracking interval is met; all intermediate stations are small stations with two tracks.

7. An electronic device, comprising: It includes a processor and a memory, wherein the memory stores a computer program, which, when executed by the processor, implements the method of any one of claims 1 to 6.

8. A readable storage medium, characterized by, The readable storage medium stores a computer program, which, when executed by a processor, implements the method of any one of claims 1 to 6.

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