Multi-locomotive reconnection locomotive power configuration method and device

Abstract

The invention discloses a multi-locomotive reconnection locomotive power configuration method and device, and the configuration method comprises the following steps: S1, calculating the maximum allowable power P3 of a locomotive operation network end according to the minimum power supply power P1 under a single power supply arm of a current line and the maximum network end power demand P2 of locomotives simultaneously operating under the same power supply arm of the current line; and S2, selecting a power configuration mode, and determining the maximum traction power of the locomotive according to the P3 and the selected power configuration mode. Due to the adoption of the technical scheme, compared with the prior art, network end power demand analysis of transportation equipment can be solved from the perspective of mobile equipment, the configuration mode can be selected automatically, and the power in the locomotive application process cannot exceed the capacity limit of a contact network; a series of accidents such as power-off protection of a top network and a substation and losses caused by the accidents are avoided.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to a method and device for configuring power of a multi-locomotive coupled locomotive. Background Art

[0002] In recent years, rail transit vehicles have rapidly developed, gradually covering increasingly harsh natural conditions such as high altitudes, large temperature swings, and long and steep slopes. This harsh environment has increased the complexity of line construction and substation design, placing restrictions on network power requirements. At the same time, the demand for heavy-load and fast transportation has also increased, resulting in a corresponding increase in locomotive power. For example, the article "Study on Traction Performance of Passenger and Freight Trains on the Sichuan-Tibet Railway" notes that "the original traction schemes for HXD1D twin-locomotive traction trains and HXD2 twin-locomotive traction trains both suffered from insufficient power when operating on the Sichuan-Tibet Railway's long and steep slopes." Consequently, multiple locomotive designs were developed, such as three four-axle coupled locomotives with a 14,400 kW traction power rating and six four-axle coupled locomotives with a 28,800 kW traction power rating. This increased network power demand, and with a single power arm, locomotive power could easily exceed the catenary load, leading to a series of accidents such as grid top-up and substation power outages, and the resulting losses. Summary of the Invention

[0003] The present invention provides a method and device for configuring the power of a multi-locomotive coupled locomotive to solve the technical problem that the locomotive power of the existing multi-locomotive coupled locomotive is easily exceeded by the contact network load under a single power supply arm, thereby causing a series of accidents such as top grid and substation power failure protection and the resulting losses.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions.

[0005] In one aspect, a method for configuring power of a multi-locomotive is provided, comprising the following steps:

[0006] S1. Based on the minimum power supply power P1 under the single power supply arm of the current line and the maximum network-end power demand P2 of locomotives operating simultaneously under the same power supply arm of the current line, the maximum allowable network-end power P3 of the locomotive is calculated using the formula P3 = (P1-P2 / m)*m; where m is the safety factor, which is selected according to the safety margin of the protection circuit setting value of the contact network substation of the current line.

[0007] S2. Select the first power configuration mode, that is, some power units are fully utilized, and the maximum traction power of the locomotive is limited to the first limit value P4; P4 = n*P6; where n is the largest positive integer that satisfies P3≥n*P5; P5 is the designed total network-end demand power required for the operation of a single car, which is equal to the sum of the designed traction network-end demand power of a single car and the designed auxiliary machine network-end demand power; P6 is the designed traction power of a single car; or select the second power configuration mode, that is, all power units are reduced in power, and the maximum traction power of the locomotive is limited to the second limit value P4'; P4' = f*P9; where, when (P3-P7) / P8≥1, f=1; when (P3-P7) / P8 is less than 1, f=(P3-P7) / P8, P7 is the designed total auxiliary machine network-end demand power of the locomotive, P8 is the designed total traction network-end demand power of the locomotive, and P9 is the total designed traction power of the locomotive.

[0008] When the first power configuration mode is selected, the positions of the main circuit breakers that need to be closed are selected and counted sequentially from the main control section (car) toward the other end of the train. When a main circuit breaker fails, the accumulated count is skipped. When the second power configuration mode is selected, all main circuit breakers on the locomotive must be closed, and the locomotive operates at limited power according to the control logic. At the same time, based on the calculated first or second limit values, combined with traction calculation analysis, it can be determined whether the current locomotive traction train can meet the operating requirements under the current line conditions, providing a reference for determining the traction constant for transportation organization.

[0009] In some embodiments, after the power configuration mode is determined, the corresponding main circuit breakers are controlled to be closed in sequence with a delayed delay; each locomotive is equipped with a power unit, and each power unit is controlled by a main circuit breaker.

[0010] In some embodiments, the closing time of the i-th main breaker is t=t0+(i-1)*k; wherein, t0 is the closing time of the first main breaker, and k is the preset delay time. Based on previous application experience, it is recommended that the default value of k be 3 seconds, which can be adjusted by the user in the DDU data maintenance related interface according to line conditions, transportation organization, and power grid characteristics.

[0011] In another aspect, a multi-locomotive power configuration device is provided, comprising a train operation monitoring device, a central control unit, and a plurality of locomotives, each locomotive being configured with a power unit;

[0012] The train operation monitoring device is used to obtain the minimum power supply power P1 of a single power supply arm of the current line and the maximum network power demand P2 of locomotives running simultaneously under the same power supply arm of the current line;

[0013] The central control unit is used for:

[0014] Based on the minimum power supply power P1 of a single power supply arm on the current line and the maximum grid-side power demand P2 of locomotives operating simultaneously on the same power supply arm on the current line, the maximum allowable grid-side power P3 of the locomotive is calculated using the formula P3 = (P1-P2 / m)*m; where m is the safety factor, which is selected based on the safety margin of the protection circuit setting value of the catenary substation on the current line;

[0015] Select the first power configuration mode, that is, some power units are fully powered, limiting the maximum traction power of the locomotive to the first limit value P4; P4 = n*P6; where n is the largest positive integer that satisfies P3≥n*P5; P5 is the designed total network-side demand power required for the operation of a single car, which is equal to the sum of the designed traction network-side demand power of a single car and the designed auxiliary machine network-side demand power; P6 is the designed traction power of a single car; or

[0016] Select the second power configuration mode, that is, all power units reduce their power and limit the maximum traction power of the locomotive to the second limit value P4'; P4'=f*P9; wherein, when (P3-P7) / P8≥1, f=1; when (P3-P7) / P8 is less than 1, f=(P3-P7) / P8, P7 is the designed total auxiliary network-end demand power of the locomotive, P8 is the designed total traction network-end demand power of the locomotive, and P9 is the total designed traction power of the locomotive.

[0017] According to the working conditions, the driver and crew can select the working mode by themselves through the DDU (driver display unit). When the first power configuration mode is selected, the position of the main breakers that need to be closed is selected and counted in sequence from the main control section (car) to the other end of the formation; when a main breaker fails, the faulty main breakers are skipped and the cumulative count is selected. When the second power configuration mode is selected, all the main breaks of the locomotive need to be closed, and the locomotive operates with limited power according to the control logic. At the same time, based on the calculated P4 and combined with the traction calculation analysis, it can be determined whether the current locomotive traction train can meet the operating requirements under the current line conditions, which can provide a reference basis for determining the traction constant for transportation organization.

[0018] In some embodiments, each of the power units is controlled by a main breaker; the central control unit is used to control the corresponding main breakers to delay closing in sequence according to the selected power configuration mode.

[0019] In some embodiments, the closing time of the i-th main breaker is t=t0+(i-1)*k; wherein, t0 is the closing time of the first main breaker, and k is the preset delay time. Based on previous application experience, it is recommended that the default value of k be 3 seconds, which can be adjusted by the user in the DDU data maintenance related interface according to line conditions, transportation organization, and power grid characteristics.

[0020] On the other hand, a locomotive power configuration device for multiple locomotives is provided, comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above method.

[0021] On the other hand, a computer-readable storage medium is provided, on which a computer program / instruction is stored, characterized in that the computer program / instruction implements the steps of the above method when executed by a processor.

[0022] On the other hand, a computer program product is provided, comprising a computer program / instruction, wherein the computer program / instruction implements the steps of the above method when executed by a processor.

[0023] The present invention has at least the following technical effects or advantages: the present invention can solve the analysis of the network power demand of transportation equipment from the perspective of mobile equipment and select the configuration method by itself, ensuring that the power during the operation of the locomotive will not exceed the capacity limit of the contact network, avoiding a series of accidents such as top network and substation power outage protection and the resulting losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic structural diagram of a multi-locomotive power configuration device according to one embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Example 1

[0027] A method for configuring power for a multi-locomotive coupled locomotive comprises the following steps:

[0028] S1, based on the minimum power supply power P1 of the current line single power supply arm (referring to the design minimum power supply capacity of the current line power supply arm, such as the minimum power supply power of a single power supply arm of a certain line is 35000kW) and the maximum network power demand P2 of the locomotives running simultaneously under the same power supply arm of the current line (referring to the sum of the network power demands of the locomotives running simultaneously under a single power supply arm of the current line, such as two locomotives with a network power demand of 10200kW running simultaneously under a certain power supply arm, then P2 = 10200 × 2 equals 20400kW), through The formula P3 = (P1-P2 / m)*m is used to calculate the maximum allowable grid-side power P3 of the locomotive (according to the above example, if the minimum power supply power of the existing single power supply arm is 35,000kW, and two locomotives with a grid-side power demand of 10,200kW are already in operation, then the maximum allowable grid-side power P3 of the newly added locomotive is P3 = (35,000-20,400 / 0.8)*0.8 = 7,600kW); where m is the safety factor, which can be selected based on the safety margin of the protection circuit setting value of the catenary substation of the current line. Because the rated breaking capacity of the fuse should be greater than the maximum expected short-circuit current of the catenary, the margin is generally 1.2 to 1.5 times to ensure reliable arc extinguishing. Therefore, the safety factor is the inverse of the margin, that is, between 0.67 and 0.83, and is confirmed based on the margin;

[0029] S2. Select the first power configuration mode, that is, some power units are fully powered, and the maximum traction power of the locomotive is limited to the first limit value P4 (according to the subsequent calculation formula, this value is the limit value of the maximum traction power of a newly added single locomotive under the premise of the minimum power supply power of a specific single power supply arm of the line and multiple locomotives are already running simultaneously. According to the above formula, combined with the values of P5 and P6 in the examples described below, in this example, P4 = 82, n = 1); P4 = n*P6; where n is the largest positive integer that satisfies P3 ≥ n*P5; P 5 is the total designed network power required for single-unit operation (e.g., if the designed traction network power requirement for a locomotive is 4900kW and the auxiliary network power is 300kW, then P5 is 4900 + 300 = 5200kW), which is equal to the sum of the designed traction network power requirement and the designed auxiliary network power requirement for a single unit; P6 is the designed traction power for a single unit (this value is determined by the top-level technical indicators of the locomotive design. For example, for an eight-axle double-unit locomotive with a traction power of 9600kW, P6 = 4800kW); or

[0030] Select the second power configuration mode, that is, all power units reduce their power and limit the maximum traction power of the locomotive to the second limit value P4' (according to the subsequent calculation formula, this value is the limit value of the maximum traction power of a single locomotive that can be supported under the premise of the minimum power supply power of a specific single power supply arm of the line and multiple locomotives running simultaneously. According to the above formula, combined with the values of P7, P8, and P9 in the following example, in this example, P4≈6800, f≈0.714); P4'=f*P9; where, when (P3-P7) / P8≥1, f=1; when (P3-P7) / P8 is less than 1, f=(P3-P7) / P8, P7 is the designed total auxiliary network-end demand power of the locomotive (taking an eight-axle double-section locomotive with a traction power of 9600kW as an example, P7=600kW), P8 is the designed total traction network-end demand power of the locomotive (taking an eight-axle double-section locomotive with a traction power of 9600kW as an example, P8=9800kW), and P9 is the total designed traction power of the locomotive (taking an eight-axle double-section locomotive with a traction power of 9600kW as an example, P9=9600kW).

[0031] S3. Control the corresponding main circuit breakers for delayed closing in sequence based on the selected power configuration. Each locomotive is equipped with a power unit, and each power unit is controlled by a main circuit breaker. When controlling the corresponding main circuit breakers for delayed closing, the closing time of the i-th main circuit breaker is t = t0 + (i-1) * k; where t0 is the closing time of the first main circuit breaker, and k is the preset delay time. Based on previous operational experience, the recommended default value of k is 3 seconds. This can be adjusted by the operator in the DDU data maintenance interface based on line conditions, transportation organization, and grid characteristics.

[0032] Example 2

[0033] like Figure 1 As shown, a multi-locomotive power configuration device includes a train operation monitoring device LKJ, a central control unit CCU, and multiple locomotives. Each locomotive is equipped with a power unit, and each power unit is controlled by a main circuit breaker. The train operation monitoring device is used to obtain the minimum power supply power P1 of a single power supply arm on the current line and the maximum network-end power demand P2 of locomotives running simultaneously on the same power supply arm on the current line.

[0034] The central control unit is used to:

[0035] Based on the minimum power supply power P1 of a single power supply arm on the current line and the maximum grid-side power demand P2 of locomotives operating simultaneously on the same power supply arm on the current line, the maximum allowable grid-side power P3 of the locomotive is calculated using the formula P3 = (P1-P2 / m)*m; where m is the safety factor, which is selected based on the safety margin of the protection circuit setting value of the catenary substation on the current line;

[0036] Select the first power configuration mode, that is, some power units are fully powered, limiting the maximum traction power of the locomotive to the first limit value P4; P4 = n*P6; where n is the largest positive integer that satisfies P3≥n*P5; P5 is the designed total network-side demand power required for the operation of a single car, which is equal to the sum of the designed traction network-side demand power of a single car and the designed auxiliary machine network-side demand power; P6 is the designed traction power of a single car; or

[0037] Select the second power configuration mode, that is, all power units reduce their power and limit the maximum traction power of the locomotive to the second limit value P4'; P4'=f*P9; wherein, when (P3-P7) / P8≥1, f=1; when (P3-P7) / P8 is less than 1, f=(P3-P7) / P8, P7 is the designed total auxiliary network-end demand power of the locomotive, P8 is the designed total traction network-end demand power of the locomotive, and P9 is the total designed traction power of the locomotive.

[0038] According to the working conditions, the driver and crew can select the working mode by themselves through the DDU (Driver Display Unit). When mode 1 is selected, some main breakers are closed, and the corresponding main breakers are located, starting from the main control section (car) and moving in sequence to the other end of the formation to select the cumulative count; when a main breaker fails, the faulty main breaker is skipped and the cumulative count is selected. When mode 2 is selected, all main breakers of the locomotive need to be closed, and the locomotive operates with limited power according to the control logic. At the same time, based on the calculated P4 and combined with the traction calculation analysis, under the current line conditions, it can be determined whether the current locomotive traction train can meet the operating requirements, which can provide a reference basis for determining the traction constant for transportation organization.

[0039] Regardless of the selected power configuration, the central control unit controls the corresponding main breakers in sequence, delaying their closing according to the selected power configuration. When the main breakers are closed sequentially with a delay, the closing time of the i-th main break is t = t0 + (i-1) * k, where t0 is the closing time of the first main break and k is the preset delay time. Based on previous operational experience, the recommended default value of k is 3 seconds. This can be adjusted by the operator in the DDU data maintenance interface based on line conditions, transportation organization, and grid characteristics.

[0040] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0041] Similarly, it should be understood that in order to streamline the present disclosure and aid understanding of one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims that follow the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0042] Those skilled in the art will appreciate that the modules, units, or groups of devices in the examples disclosed herein may be arranged in the device described in the embodiment, or alternatively may be located in one or more devices different from the devices in the examples. The modules in the aforementioned examples may be combined into one module or further divided into multiple submodules.

[0043] It will be appreciated by those skilled in the art that the modules in the devices of the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or groups in the embodiments may be combined into one module or unit or group, and furthermore they may be divided into a plurality of submodules or subunits or subgroups. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed herein may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0044] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features and not other features included in other embodiments, the combination of features from different embodiments is intended to be within the scope of the invention and to form different embodiments.

[0045] In addition, some of the embodiments are described herein as methods or combinations of method elements that can be implemented by a processor of a computer system or by other devices that perform the functions described. Thus, a processor having the necessary instructions for implementing the method or method element forms a device for implementing the method or method element. Furthermore, the elements described herein of the device embodiments are examples of devices for implementing the functions performed by the elements for the purpose of implementing the invention.

[0046] The various techniques described herein may be implemented in conjunction with hardware or software, or a combination thereof. Thus, the methods and apparatus of the present invention, or certain aspects or portions of the methods and apparatus of the present invention, may take the form of program code (i.e., instructions) embedded in a tangible medium, such as a floppy disk, CD-ROM, hard drive, or any other machine-readable storage medium, wherein when the program is loaded into a machine such as a computer and executed by the machine, the machine becomes an apparatus for practicing the present invention.

[0047] When the program code is executed on a programmable computer, the computing device generally includes a processor, a storage medium readable by the processor (including volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device. The memory is configured to store the program code; the processor is configured to execute the method of the present invention according to the instructions in the program code stored in the memory.

[0048] By way of example and not limitation, computer-readable media include computer storage media and communication media. Computer-readable media include computer storage media and communication media. Computer storage media stores information such as computer-readable instructions, data structures, program modules, or other data. Communication media generally embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and includes any information delivery media. Combinations of any of the above are also included within the scope of computer-readable media.

[0049] As used herein, unless otherwise specified, the use of ordinal numbers "first," "second," "third," etc. to describe common objects merely indicates that different instances of similar objects are involved and are not intended to imply that the objects so described must have a given order in time, space, ranking, or in any other manner.

[0050] Although the present invention has been described with respect to a limited number of embodiments, it will be apparent to those skilled in the art, having benefit of the foregoing description, that other embodiments are contemplated within the scope of the invention thus described. Furthermore, it should be noted that the language used in this specification has been selected primarily for readability and didactic purposes, rather than for the purpose of explaining or limiting the subject matter of the present invention. Consequently, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is intended to be illustrative rather than restrictive of the scope of the invention, which is defined by the appended claims.

[0051] Finally, it should be noted that the present invention does not explain in detail the common knowledge recognized by technicians in this field. The above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for configuring power of a multi-locomotive, characterized in that: The method comprises the following steps: S1. Based on the minimum power supply power P1 of a single power supply arm on the current line and the maximum grid-side power demand P2 of locomotives operating simultaneously on the same power supply arm on the current line, calculate the maximum allowable grid-side power P3 of the locomotive using the formula P3 = (P1-P2 / m)*m; where m is the safety factor, selected based on the safety margin of the protection circuit setting value of the catenary substation on the current line; S2. Select the first power configuration mode, i.e., some power units are fully powered, limiting the maximum traction power of the locomotive to a first limit value P4; P4 = n*P6; where n is the largest positive integer that satisfies P3 ≥ n*P5; P5 is the designed total network-side demand power required for the operation of a single car, which is equal to the sum of the designed traction network-side demand power of a single car and the designed auxiliary machine network-side demand power; P6 is the designed traction power of a single car; or Select the second power configuration mode, that is, all power units reduce their power and limit the maximum traction power of the locomotive to the second limit value P4'; P4'=f*P9; wherein, when (P3-P7) / P8≥1, f=1; when (P3-P7) / P8 is less than 1, f=(P3-P7) / P8, P7 is the designed total auxiliary network-end demand power of the locomotive, P8 is the designed total traction network-end demand power of the locomotive, and P9 is the total designed traction power of the locomotive.

2. The method for configuring power for a multi-locomotive system according to claim 1, characterized in that: After the power configuration mode is determined, the corresponding main circuit breakers are controlled to delay closing in sequence; each locomotive is equipped with a power unit, and each power unit is controlled by a main circuit breaker.

3. The method for configuring power for a multi-locomotive system according to claim 2, characterized in that: The closing time of the i-th main breaker is t=t0+(i-1)*k; where t0 is the closing time of the first main breaker and k is the preset delay time.

4. A locomotive power configuration device for multiple locomotives, characterized by: It includes a train operation monitoring device, a central control unit and multiple locomotives, each of which is equipped with a power unit; The train operation monitoring device is used to obtain the minimum power supply power P1 of a single power supply arm of the current line and the maximum network power demand P2 of locomotives running simultaneously under the same power supply arm of the current line; The central control unit is used for: Based on the minimum power supply power P1 of a single power supply arm on the current line and the maximum grid-side power demand P2 of locomotives operating simultaneously on the same power supply arm on the current line, the maximum allowable grid-side power P3 of the locomotive is calculated using the formula P3 = (P1-P2 / m)*m; where m is the safety factor, which is selected based on the safety margin of the protection circuit setting value of the catenary substation on the current line; Select the first power configuration mode, that is, some power units are fully powered, limiting the maximum traction power of the locomotive to the first limit value P4; P4 = n*P6; where n is the largest positive integer that satisfies P3≥n*P5; P5 is the designed total network-side demand power required for the operation of a single car, which is equal to the sum of the designed traction network-side demand power of a single car and the designed auxiliary machine network-side demand power; P6 is the designed traction power of a single car; or Select the second power configuration mode, that is, all power units reduce their power and limit the maximum traction power of the locomotive to the second limit value P4'; P4'=f*P9; wherein, when (P3-P7) / P8≥1, f=1; when (P3-P7) / P8 is less than 1, f=(P3-P7) / P8, P7 is the designed total auxiliary network-end demand power of the locomotive, P8 is the designed total traction network-end demand power of the locomotive, and P9 is the total designed traction power of the locomotive.

5. The multi-locomotive power configuration device according to claim 4, characterized in that: Each of the power units is controlled by a main breaker; the central control unit is used to control the corresponding main breakers to delay closing in sequence according to the power configuration mode.

6. The multi-locomotive power configuration device according to claim 5, characterized in that: The closing time of the i-th main breaker is t=t0+(i-1)*k; where t0 is the closing time of the first main breaker and k is the preset delay time.

7. A locomotive power configuration device for multiple locomotives, comprising a memory, a processor, and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 3.

8. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

9. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

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