Power supply control strategy generation method and device based on vehicle-ground integrated system

Abstract

The invention provides a power supply control strategy generation method and device based on a train-ground integrated system. The method can be applied to the technical field of rail transit energy control. The method comprises the following steps: acquiring running state information of a target vehicle on a running track and load state information of a contact network arranged on the running track; wherein the operation state information comprises an energy demand corresponding to the operation condition; generating a power supply control strategy based on the energy demand and the load state information corresponding to the operation condition; wherein the power supply control strategy is used for controlling each traction power supply device to supply power to the overhead line system so as to meet the power flow distribution threshold value and the energy demand of the overhead line system on the operation track.

Description

Technical Field

[0001] The present disclosure relates to the field of rail transit energy control technology, and more specifically, to a method and device for generating a power supply control strategy based on a vehicle-ground integrated system. Background Art

[0002] In traditional electromechanical systems, information cannot be shared between vehicles and power supply systems, and each is controlled independently, resulting in low coordination efficiency between the ground power supply system and the vehicle, and it is difficult to achieve effective breakthroughs in the performance of the system. In addition, in traditional DC traction power supply, the voltage fluctuation range of the contact network is large, resulting in low quality of the provided power, and serious cross-regional power supply. Due to power transmission losses such as voltage drop, power utilization is insufficient. In traditional AC traction power supply, energy flows in different regions, and the power supply arm supplies power independently, resulting in insufficient utilization of power supply capacity. Therefore, in the current power supply method, the power supply capacity, quality, and energy-saving effect need to be improved. Summary of the invention

[0003] In view of this, the present disclosure provides a method and device for generating a power supply control strategy based on a vehicle-ground integrated system.

[0004] One aspect of the present disclosure provides a method for generating a power supply control strategy, comprising: obtaining operating status information of a target vehicle on a running track and load status information of an overhead contact network arranged on the running track; wherein the operating status information includes an energy demand corresponding to the operating condition; based on the energy demand and load status information corresponding to the operating condition, generating a power supply control strategy; wherein the power supply control strategy is used to control each traction power supply device to supply power to the overhead contact network to meet the flow distribution threshold and energy demand of the overhead contact network on the running track.

[0005] According to an embodiment of the present disclosure, the load status information includes the load status of each traction power supply device; based on the energy demand corresponding to the operating condition and the load status information, a power supply control strategy is generated, including: based on the energy demand corresponding to the operating condition and the load status of each traction power supply device, generating the power required to be output by each traction device; and generating a power supply control strategy based on the power required to be output by each traction device.

[0006] According to an embodiment of the present disclosure, each traction power supply device is a DC power supply device; based on the power required to be output by each traction device, a power supply control strategy is generated, including: based on the power required to be output by each traction device, a control instruction for each traction device is generated; and based on the control instruction for each traction device, a power supply control strategy is generated.

[0007] According to an embodiment of the present disclosure, each traction power supply device is an AC power supply device; based on the power required to be output by each traction device, a power supply control strategy is generated, including: based on the power required to be output by each traction device, a first control instruction for controlling each same-phase power supply device and a second control instruction for controlling an energy scheduling device are generated; wherein the same-phase power supply device is arranged on a power supply arm between each traction power supply device and the contact network, and is used to convert electrical signals of different phases into electrical signals of the same phase; the energy scheduling device is used to connect the power supply arms between different traction power supply devices, so that the energy received by the contact network can be directly used to power the vehicle; and a power supply control strategy is generated according to each first control instruction and the second control instruction.

[0008] According to an embodiment of the present disclosure, the above method also includes: generating energy demand at a target time based on energy demand corresponding to the operating conditions and a predetermined communication delay; and generating a control strategy based on energy demand at the target time and load status information.

[0009] According to an embodiment of the present disclosure, the operating status information also includes: the operating position and operating speed at the current moment; generating a control strategy based on the energy demand and load status information at the target moment, including: calculating the operating position at the target moment based on the operating position, operating speed and predetermined communication delay at the current moment; obtaining the load status information of the target traction power supply equipment that is adjacent to the operating position at the target moment; wherein the power supply distance of the target traction power supply equipment relative to the target vehicle is shorter than the power supply distance of other traction power supply equipment arranged on the running track relative to the target vehicle; and generating power supply control strategy information for the target traction power supply equipment based on the load status information of the target traction power supply equipment and the energy demand at the target moment.

[0010] Another aspect of the present disclosure provides a power supply control strategy generation device based on a vehicle-ground integrated system, including: an acquisition module, used to obtain the operating status information of the target vehicle on the operating track and the load status information of the contact network arranged on the operating track; wherein the operating status information includes the energy demand corresponding to the operating condition; a generation module, used to generate a power supply control strategy based on the energy demand and load status information corresponding to the operating condition; wherein the power supply control strategy is used to control each traction power supply device to supply power to the contact network to meet the flow distribution threshold and energy demand of the contact network on the operating track.

[0011] Another aspect of the present disclosure provides a train, comprising: the above-mentioned device is configured on the train.

[0012] Another aspect of the present disclosure provides a traction power supply system, which includes: multiple traction power supply devices, and an energy management platform for executing the above method to generate a power supply control strategy to control the multiple traction power supply devices to supply power to the contact network.

[0013] According to an embodiment of the present disclosure, the above-mentioned traction power supply system also includes: a same-phase power supply device, which is arranged on the power supply arm between each traction power supply device and the contact network, and is used to convert electrical signals of different phases into electrical signals of the same phase; an energy dispatching device, which is used to connect the power supply arms between different traction power supply devices so that the energy received by the contact network can be directly used to power the vehicle.

[0014] According to the embodiments of the present disclosure, the vehicle's operating status information on the running track and the load status information of the contact network arranged on the running track are obtained through the vehicle-ground integrated system, and information sharing between the vehicle and the power supply system is established. Based on the operating status information of the vehicle under different working conditions on the running track and the load status information of the contact network arranged on the running track, a power supply control strategy is generated to control each traction power supply device to supply power to the contact network, so as to meet the flow distribution threshold and energy demand of the contact network on the running track, improve the traction power supply quality and energy saving efficiency, and reduce unnecessary energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0016] Figure 1 The schematic diagram shows the architecture of a vehicle-ground integrated system to which the power supply control strategy generation method according to an embodiment of the present disclosure can be applied;

[0017] Figure 2 A flowchart of a method for generating a power supply control strategy based on a vehicle-ground integrated system according to an embodiment of the present disclosure is schematically shown;

[0018] Figure 3 A flowchart of a method for generating a power supply control strategy based on a load state of a traction power supply device according to an embodiment of the present disclosure is schematically shown;

[0019] Figure 4 A schematic diagram schematically shows a method for generating a power supply control strategy based on a DC power supply device according to an embodiment of the present disclosure;

[0020] Figure 5 A schematic diagram of a power supply process based on a DC power supply device according to an embodiment of the present disclosure is shown;

[0021] Figure 6 A schematic diagram schematically shows a method for generating a power supply control strategy based on an AC power supply device according to an embodiment of the present disclosure;

[0022] Figure 7 A schematic diagram of a power supply process based on an AC power supply device according to an embodiment of the present disclosure is shown;

[0023] Figure 8 A structural block diagram of a power supply control strategy generating device based on a vehicle-ground integrated system according to an embodiment of the present disclosure is schematically shown;

[0024] Fig. 9 A block diagram schematically shows an electronic device suitable for implementing the method described above according to an embodiment of the present disclosure;

[0025] Fig.10 A schematic diagram of a DC mode traction power supply system according to an embodiment of the present disclosure is schematically shown;

[0026] Fig.11 A schematic diagram of an AC mode traction power supply system according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0028] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0029] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0030] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0031] In the embodiments of the present disclosure, the collection, updating, analysis, processing, use, transmission, provision, disclosure, storage, etc. of the data involved (for example, including but not limited to user personal information) are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information, network security, and national security.

[0032] In the embodiments of the present disclosure, the user's authorization or consent is obtained before obtaining or collecting the user's personal information.

[0033] In traditional electromechanical systems, information cannot be shared between the vehicle and the power supply system, and each is controlled independently, resulting in low coordination efficiency between the ground power supply system and the vehicle and an urgent need to improve the system's performance.

[0034] In terms of traditional DC traction power supply, the fluctuation range of overhead line voltage is large, resulting in low quality of power supply, and serious cross-regional power supply. Due to power transmission losses such as voltage drop, power utilization is insufficient. In terms of traditional AC traction power supply, energy flows in different regions, and power supply arms are independently powered, resulting in insufficient utilization of power supply capacity. Therefore, in the current power supply method, power supply capacity, quality and energy-saving effect need to be improved.

[0035] In view of this, the embodiment of the present disclosure provides a method for generating a power supply control strategy, which obtains the running status information of the vehicle on the running track and the load status information of the contact network arranged on the running track through the vehicle-ground integrated system, and establishes information sharing between the vehicle and the power supply system. Based on the running status information of the vehicle under different working conditions on the running track and the load status information of the contact network arranged on the running track, a power supply control strategy is generated to control each traction power supply device to supply power to the contact network, so as to meet the flow distribution threshold and energy demand of the contact network on the running track, improve the traction power supply quality and energy saving efficiency, and reduce unnecessary energy loss.

[0036] Figure 1 The schematic diagram shows the architecture of the vehicle-ground integrated system to which the power supply control strategy generation method according to the embodiment of the present disclosure can be applied. It should be noted that: Figure 1 What is shown is merely an example of a system architecture to which the embodiments of the present disclosure can be applied, in order to help those skilled in the art understand the technical content of the present disclosure, but it does not mean that the embodiments of the present disclosure cannot be used in other devices, systems, environments or scenarios.

[0037] like Figure 1As shown, according to the embodiment, the vehicle-ground integrated system architecture 100 includes a vehicle system 101 and a ground system 102, wherein the vehicle system 101 includes an on-board network subsystem 101-1 and an on-board signal device 101-2, and the ground system 102 includes a ground signal subsystem 102-1 and a ground traction power supply subsystem 102-2. The vehicle-ground communication between the vehicle system 101 and the ground system 102 is mainly realized based on LTE (Long Term Evolution) or WLAN (Wireless Local Area Network), the communication between the subsystems of the vehicle system 101 is mainly realized based on Multifunction Vehicle Buss (MVB) or vehicle Ethernet, and the communication between the subsystems of the ground system 102 is mainly realized based on Ethernet or optical fiber.

[0038] During the operation of the vehicle, the vehicle's operating conditions, operating speed, level, network voltage and other information are transmitted in real time from the vehicle network subsystem 101-1 to the vehicle signal device 101-2 through the vehicle communication connection, and then transmitted to the ground signal subsystem 102-1 by means of vehicle-ground wireless data. The ground signal subsystem 102-1 superimposes the vehicle position information and forwards the vehicle operation status data on the line to the ground traction power supply subsystem 102-2. At the same time, the voltage and current information of the AC and DC switch cabinets in the traction power supply system is obtained in real time through the ground communication connection. When the operator issues an energy-saving mode input instruction to the platform, the analysis and calculation are started, and the optimal power supply control strategy is generated according to the real-time vehicle operation status data and AC and DC switch cabinet operation status information, and the control instruction is issued to the execution device, so as to achieve the optimal energy-saving control of the traction power supply system by controlling the output of the ground traction power supply subsystem 102-2, improve the comprehensive energy-saving rate, reduce line losses and optimize power quality.

[0039] In addition, a ground data center can be set up in the ground signal subsystem 102-1 and the ground traction power supply subsystem 102-2. After the vehicle data and signal data are transmitted, they are gathered in the ground data center and then sent to the ground traction power supply subsystem 102-2. There is no restriction on whether to set up the ground data center, and it does not affect the operation of the vehicle system and the ground system.

[0040] It should be understood that Figure 1 The number of systems and devices in the figure is only for illustration. Any number of systems and devices may be provided according to implementation requirements.

[0041] Figure 2 The flowchart of the method for generating a power supply control strategy based on a vehicle-ground integrated system according to an embodiment of the present disclosure is schematically shown.

[0042] like Figure 2 As shown, the method 200 includes operations S210 to S220.

[0043] In operation S210, operating state information of the target vehicle on the operating track and load state information of the overhead contact network arranged on the operating track are acquired.

[0044] In operation S220, a power supply control strategy is generated based on energy demand and load status information corresponding to the operating condition.

[0045] According to an embodiment of the present disclosure, the running state information of the target vehicle on the running track includes the running condition, running position, running speed and vehicle traction or regenerative braking power of the target vehicle, wherein the running condition includes three conditions: traction, braking and no-load. The following takes the three conditions in DC mode as an example for description:

[0046] Traction: When the target vehicle is in the traction condition, the traction power supply system controls the DC traction power supply equipment to provide traction energy to the target vehicle as close as possible, with the goals and constraints of minimizing power transmission losses in the power grid, optimizing the utilization of regenerative feedback energy (AC, feedback or absorption by neighboring vehicles), and voltage fluctuations, and calculates and sends to each DC side the voltage regulation reference value instruction and droop slope to achieve regulated power supply.

[0047] Braking: When the target vehicle is in the vehicle braking state, the traction power supply system controls the DC traction power supply equipment to feed back electric energy. The inverter floating threshold value is dynamically adjusted according to the line flow distribution. The DC traction power supply equipment works in the inverter feedback mode. When the regenerative braking power is ≤ the capacity of the DC traction power supply equipment, the feedback power will be output in a regulated voltage; when the regenerative braking power is greater than the capacity of the DC traction power supply equipment, the DC traction power supply equipment will output constant power according to its designed capacity.

[0048] No-load: When the target vehicle is in the no-load state, the voltage output characteristic curve of the traction power supply system within a certain range controls the DC output voltage of the DC traction power supply equipment. When the DC traction power supply equipment in the power supply section is judged to be no-load, the voltage reference value and droop slope are sent to the no-load DC traction power supply equipment to achieve no-load circulating current suppression.

[0049] The operating status information also includes the energy demand corresponding to the operating conditions. The energy demand represents the electrical energy required to meet the normal operation of the target vehicle under the current operating state.

[0050] The number of target vehicles can be one or two or more, and there is no restriction here.

[0051] The load status information of the contact network includes the network voltage and network current information of the contact network. As the traction power of the vehicle increases, the load current of the traction power supply system will increase exponentially. The network voltage of the contact network directly affects the traction power and operating status of the vehicle. The stability of the network voltage of the contact network is crucial to the normal operation of the power supply equipment and the safe operation of the vehicle. The network voltage and network current of the contact network jointly determine the power supply capacity and power transmission efficiency of the contact network.

[0052] The power supply control strategy is used to control each traction power supply device to supply power to the contact network to meet the power flow distribution threshold and energy demand of the contact network on the running track, where the power flow distribution threshold of the contact network includes the voltage threshold and the current threshold of the contact network.

[0053] According to the embodiments of the present disclosure, the vehicle's operating status information on the running track and the load status information of the contact network arranged on the running track are obtained through the vehicle-ground integrated system, and information sharing between the vehicle and the power supply system is established. Based on the operating status information of the vehicle under different working conditions on the running track and the load status information of the contact network arranged on the running track, a power supply control strategy is generated to control each traction power supply device to supply power to the contact network, so as to meet the flow distribution threshold and energy demand of the contact network on the running track, improve the traction power supply quality and energy saving efficiency, and reduce unnecessary energy loss.

[0054] Figure 3 The flowchart of the method for generating a power supply control strategy based on the load state of a traction power supply device according to an embodiment of the present disclosure is schematically shown.

[0055] like Figure 3 As shown, the method 300 includes operations S321-S322.

[0056] In operation S321 , based on energy requirements corresponding to the operating conditions and load states of the traction power supply devices, power required to be output by each traction device is generated.

[0057] In operation S322 , a power supply control strategy is generated based on the power required to be output by each traction device.

[0058] According to the embodiments of the present disclosure, the traction power supply equipment varies according to the DC mode and the AC mode. In the DC mode, the traction power supply equipment includes a bidirectional converter, an energy feedback device, etc. In the AC mode, the traction power supply equipment includes an automatic over-phase device, an energy scheduling device, and a same-phase power supply device, etc.

[0059] According to an embodiment of the present disclosure, the load status information includes the load status of each traction power supply device, specifically, including parameters such as voltage, current, power and power supply efficiency of the traction power supply device.

[0060] For example, in DC mode, the load status of the traction power supply equipment includes the DC switchgear bus voltage, DC switchgear bus current, AC switchgear three-phase bus voltage, and AC switchgear three-phase bus current. In AC mode, the load status of the traction power supply equipment includes the traction transformer 110kV bus voltage, traction transformer 110kV bus current, traction transformer 27.5kV bus voltage, and traction transformer 27.5kV bus current.

[0061] According to the embodiments of the present disclosure, based on the energy demand corresponding to the operating conditions and the load status of each traction power supply device, the power required to be output by each traction device is generated, and based on the power required to be output by each traction device, a corresponding power supply control instruction is generated, and a power supply control strategy is generated for coordinating and controlling each traction power supply device to supply power to the contact network, so as to meet the energy demand of the target vehicles within the operating range while meeting the flow distribution threshold of the contact network, reduce the network voltage fluctuation of the contact network, and improve the traction power supply quality and energy-saving efficiency.

[0062] According to an embodiment of the present disclosure, each traction power supply device is a DC power supply device, and a power supply control strategy is generated based on the power required to be output by each traction device, including: generating control instructions for each traction device based on the power required to be output by each traction device; and generating a power supply control strategy based on the control instructions of each traction device.

[0063] According to an embodiment of the present disclosure, a DC power supply device includes a bidirectional converter.

[0064] The control instructions for each traction equipment include control instructions for the traction network voltage, traction power, etc. of the DC power supply equipment.

[0065] Figure 4 A schematic diagram of a method for generating a power supply control strategy based on a DC power supply device according to an embodiment of the present disclosure is schematically shown.

[0066] like Figure 4 As shown, the vehicle-ground coordinated traction power supply system (DC) 400 includes a vehicle-ground energy management platform and a bidirectional converter. The vehicle-ground energy management platform obtains the vehicle's position, power, speed and other data from the signal system through the communication optical fiber, obtains the analysis result after analysis and calculation, and then sends the traction network voltage, power and other control instructions to each bidirectional converter through the optical fiber. The energy management platform coordinates multiple substations for coordinated power supply according to the pre-set control target, and the control target includes the network voltage threshold of each traction substation, the line flow distribution threshold and the power threshold at the 110kV incoming line.

[0067] The DC grid voltage fluctuation range of the traditional traction power supply system is DC1450~1800V, while the active traction power supply system controls the DC grid voltage by controlling the output of the bidirectional converter of the traction station. The DC grid voltage fluctuation range can be controlled within DC1650~1750V, which increases the DC grid voltage while reducing the grid voltage fluctuation.

[0068] The vehicle-ground energy management platform controls the output of the bidirectional converter according to the monitored vehicle operating conditions in the operating range, so as to achieve the purpose of power supply nearby and increase the absorption of adjacent vehicles, thereby reducing the energy returned to the 110kV power grid. According to the test verification, when the density of vehicle departure is large (for example, 2 minutes or less), the feedback energy can be completely absorbed by the adjacent vehicles and consumed by the load in the station, and there is no need for scheduling and almost no return to the 110kV side power grid; when the density of vehicle departure is small (for example, more than 5 minutes), the energy management platform dynamically adjusts the starting voltage of the bidirectional converters connected to different main transformers to achieve the dispatch of braking energy between different sections of 35kV busbars, thereby avoiding the return of energy to the 110kV power grid.

[0069] Figure 5 A schematic diagram of a power supply process based on a DC power supply device according to an embodiment of the present disclosure is schematically shown.

[0070] Taking the conversion of 110kV AC power to 35kV ring network as an example, the process of powering vehicles under DC power supply equipment is described. Figure 5 As shown in the figure, the traction station replaces the rectifier unit + energy feedback device in the traditional DC mode with a bidirectional converter, configures an energy storage device according to the situation, and configures an energy management system. In the DC mode, the energy management system determines the power required by the vehicle at the current moment after obtaining the vehicle's operating status information such as the operating condition and operating position.

[0071] According to the load status information of the bidirectional converter of the traction station that is closer to the current running position of the vehicle, for example, the traction stations that are closer to vehicle 1 are traction stations 1 and traction stations 2, and according to the current power required by vehicle 1, the traction power, AC and DC side voltage, and current information of the bidirectional converter of the above traction station are determined. The bidirectional converter directly generates control instructions according to the above traction power, voltage and current, and directly supplies power to the train. The above power supply method opens up the information flow and energy flow between the train and the ground, and converts it into active power supply, which increases the comprehensive energy saving rate by about 5%, reduces the line loss by about 20%, and the DC network voltage fluctuation is ≤±3%.

[0072] According to the embodiments of the present disclosure, the electric energy required to meet the normal operation of the vehicle is determined by timely acquiring the operating status information of the vehicle. The power required to be output by each traction device for powering the vehicle is determined by acquiring the load status information of the traction device, and the control instructions of the traction device are generated to obtain the power supply control strategy. In the DC mode, the control instructions are directly generated based on the energy demand to reduce the voltage fluctuation of the overhead line. At the same time, since the traction station with a relatively close distance is selected for power supply, the line loss of electric energy during power transmission is reduced, the comprehensive utilization rate of electric energy is improved, and the traction power supply quality and energy saving efficiency are improved.

[0073] According to an embodiment of the present disclosure, each traction power supply device is an AC power supply device, and a power supply control strategy is generated based on the power required to be output by each traction device, including: based on the power required to be output by each traction device, generating a first control instruction for controlling each same-phase power supply device and a second control instruction for controlling an energy scheduling device; and generating a power supply control strategy based on each first control instruction and the second control instruction.

[0074] According to an embodiment of the present disclosure, the AC power supply equipment includes a same-phase power supply equipment and an energy scheduling equipment. The same-phase power supply equipment is arranged on the power supply arm between each traction power supply equipment and the contact network, and is used to convert electrical signals of different phases into electrical signals of the same phase; the energy scheduling equipment is used to connect the power supply arms between different traction power supply equipment so that the energy received by the contact network can be directly used to power the vehicle.

[0075] The first control instruction includes the power control instruction of the same-phase power supply equipment, such as the active power and reactive power control instruction of the same-phase power supply equipment. The second control instruction includes the power control instruction of the energy dispatching equipment, such as the active power and reactive power of the energy dispatching equipment, and the active dispatch control instruction of the energy dispatching equipment.

[0076] Figure 6 A schematic diagram schematically shows a method for generating a power supply control strategy based on an AC power supply device according to an embodiment of the present disclosure.

[0077] like Figure 6 As shown, the vehicle-ground coordinated traction power supply system (AC) 600 includes a vehicle-ground energy management platform, a same-phase power supply device and an energy dispatching device. The same-phase power supply device is configured in the traction station to cancel the phase separation of the traction station outlet electricity, realize the same-phase power supply of the entire line, balance the three-phase load, and reduce the negative sequence. The energy dispatching device is configured in the sub-station to flexibly connect the ends of the two adjacent power supply arms and realize bilateral controllable power supply, improve the utilization rate of regenerative braking energy, eliminate the power-free area of ​​the sub-station, and support the train to perceive the excessive phase separation without perception.

[0078] The vehicle-ground energy management platform obtains the vehicle's location, power, speed and other data from the signal system through communication optical fiber, and dynamically optimizes the active power and reactive power output of the same-phase power supply device and the energy dispatching device through full-line power flow calculation. The vehicle-ground energy management platform coordinates multiple substations for collaborative power supply according to pre-set control targets. The control targets include the active power and reactive power thresholds output by the traction equipment, the line power flow distribution threshold, and the power threshold at the 110kV incoming line.

[0079] Figure 7 The schematic diagram of the power supply process based on the AC power supply device according to the embodiment of the present disclosure is schematically shown.

[0080] like Figure 7 As shown, the traction station is equipped with a same-phase power supply device, the substation is equipped with an energy dispatch device, the substation outlet power phase separation and substation power phase separation are cancelled, and an energy management system is configured. In the AC mode, the energy management system obtains the vehicle's operating status information such as the operating condition and operating position, and determines the power required by the vehicle at the current moment.

[0081] Determine the load status information of the same-phase power supply device that is closer to the current running position of the vehicle, for example, the traction station that is closer to vehicle 2 is traction station 2. According to the electric energy currently required by vehicle 2, determine the active power and reactive power output by the same-phase power supply device of traction station 2, generate a first control instruction, and directly power the train to avoid the vehicle sliding without energy at the connection point of different-phase electric signals.

[0082] In addition, if vehicle 1 is in a braking state and vehicle 2 is in a traction state, the electric energy fed back to the contact network by vehicle 1 can be directly supplied to vehicle 2 through the energy dispatching device, so that the energy fed back to the contact network by the vehicle can be directly used for other vehicles, reducing the peak value of each traction power supply equipment.

[0083] The traditional traction power supply system can also recycle part of the regenerative braking energy of the vehicle, but the power supply arm is short and the utilization rate is low, and the other part is fed back to the power grid. The above power supply method can connect the traction network power supply arm to optimize the traction network flow distribution, further improve the utilization rate of regenerative braking energy, reduce the load peak of the traction station, reduce the demand electricity charge, and provide power supply support capabilities for neighboring stations.

[0084] According to the embodiments of the present disclosure, the electric energy required to meet the normal operation of the vehicle is determined by acquiring the operating status information of the vehicle. The load status information of the traction equipment is obtained to determine the power that each traction equipment needs to output to power the vehicle, and a first control instruction for controlling each same-phase power supply device and a second control instruction for controlling the energy dispatching device are generated, thereby obtaining a power supply control strategy. The above-mentioned power supply strategy, through the energy management system, realizes coordinated power supply between multiple stations, balances the load rate of each section, opens up the information flow and energy flow between the vehicle and the ground, realizes the same-phase connection, negative sequence control, and reactive power compensation of the entire line in the AC mode, improves the utilization rate of regenerative braking energy, improves the comprehensive utilization rate of electric energy, and at the same time improves the quality of electric energy and power supply.

[0085] According to an embodiment of the present disclosure, the above method also includes: generating energy demand at a target time based on energy demand corresponding to the operating conditions and a predetermined communication delay; and generating a control strategy based on energy demand at the target time and load status information.

[0086] According to the embodiments of the present disclosure, there is a signal delay during signal transmission. According to theoretical analysis, the line signal delay can be up to 1.5s. The predetermined communication delay includes 1.5s and also includes a communication delay greater than 1.5s.

[0087] Based on the energy demand corresponding to the operating conditions and the predetermined communication delay, the energy demand at the target moment is generated, including using algorithms such as neural networks or support vector machines to predict and calculate the energy demand at the target moment using the energy demand of the current operating conditions and the predetermined communication delay.

[0088] For example, the energy demand corresponding to the operating conditions at time t can be collected, and the energy demand at time t+1.5s can be predicted based on algorithms such as neural networks or support vector machines. Then, the control strategy is generated based on the energy demand at time t+1.5s based on the method described above to improve the control accuracy, thereby effectively reducing the impact of the hysteresis of the control strategy on the stable operation of the overhead line and the vehicle.

[0089] The neural network or support vector machine used to predict energy demand can be trained using energy demands corresponding to historical vehicles and various sample operating conditions.

[0090] For example, the energy demand corresponding to the operating conditions at time t can be input into the initial model, and the predicted energy demand at time t+1.5s can be output. Then, the loss value can be calculated based on the predicted energy demand at time t+1.5s and the actual energy demand corresponding to the operating conditions at time t+1.5s. The initial model can be adjusted based on the loss value to obtain a trained model.

[0091] The initial model can be a temporal neural network, such as LSTM (Long Short-Term Memory).

[0092] According to the embodiments of the present disclosure, since there is a communication delay in signal transmission during actual operation, the energy demand of the vehicle may change significantly after the communication delay. Therefore, by predicting the actual energy demand after a predetermined signal delay, the problem of reduced control accuracy caused by signal transmission delay can be reduced, thereby improving the control accuracy of the power supply control strategy.

[0093] According to an embodiment of the present disclosure, the operating status information also includes: the operating position and operating speed at the current moment, and generating a control strategy based on the energy demand and load status information at the target moment, including: calculating the operating position at the target moment based on the operating position, operating speed and predetermined communication delay at the current moment; obtaining the load status information of the target traction power supply equipment that is adjacent to the operating position at the target moment; wherein the power supply distance of the target traction power supply equipment relative to the target vehicle is shorter than the power supply distance of other traction power supply equipment arranged on the running track relative to the target vehicle; and generating power supply control strategy information for the target traction power supply equipment based on the load status information of the target traction power supply equipment and the energy demand at the target moment.

[0094] The ground energy management platform can obtain the vehicle's current operating position, operating speed and scheduled communication delay, and obtain the vehicle's operating position after the scheduled delay through real-time prediction and calculation by the prediction algorithm. In addition, the prediction results can be corrected according to real-time data to obtain accurate vehicle operating position information.

[0095] Due to the communication delay, if the vehicle moves to another location after the communication delay, and the traction equipment before the communication delay is still controlled to supply power, the line loss will increase due to the increase in distance. Therefore, by predicting the exact location of the vehicle after the communication delay, and then using the traction power supply equipment corresponding to the location to supply power nearby, the power loss during line transmission can be reduced.

[0096] According to the embodiments of the present disclosure, by acquiring the vehicle's current operating position, operating speed and energy demand information, the vehicle's operating position and operating energy demand after the operating communication delay are predicted, thereby providing an accurate power supply strategy, thereby improving the control accuracy of the power supply control strategy. At the same time, since the accurate operating position of the vehicle is predicted, power supply can be provided nearby, which can effectively improve energy utilization.

[0097] Based on the above-mentioned method for generating a power supply control strategy based on a vehicle-ground integrated system, the present disclosure also provides a device for generating a power supply control strategy based on a vehicle-ground integrated system. Figure 8 The device is described in detail.

[0098] Figure 8 The structural block diagram of a power supply control strategy generating device based on a vehicle-ground integrated system according to an embodiment of the present disclosure is schematically shown.

[0099] like Figure 8 As shown, the power supply control strategy generation device 800 based on the vehicle-ground integrated system of this embodiment includes an acquisition module 810 and a generation module 820 .

[0100] The acquisition module 810 is used to acquire the running state information of the target vehicle on the running track and the load state information of the contact network arranged on the running track; wherein the running state information includes the energy demand corresponding to the running condition. In one embodiment, the acquisition module 810 can be used to perform the operation S210 described above, which will not be repeated here.

[0101] The generation module 820 is used to generate a power supply control strategy based on the energy demand and load state information corresponding to the operating condition; wherein the power supply control strategy is used to control each traction power supply device to supply power to the overhead line to meet the flow distribution threshold and energy demand of the overhead line on the operating track. In one embodiment, the generation module 820 can be used to perform the operation S220 described above, which will not be repeated here.

[0102] According to an embodiment of the present disclosure, the generation module further includes a traction power supply equipment output power submodule and a strategy generation submodule. The traction power supply equipment output power submodule is used to generate the power required to be output by each traction device based on the energy demand corresponding to the operating condition and the load state of each traction power supply device. The strategy generation submodule is used to generate a power supply control strategy based on the power required to be output by each traction device.

[0103] According to an embodiment of the present disclosure, the strategy generation submodule includes a DC device control instruction generation unit and a first strategy generation unit. The DC device control instruction generation unit is used to generate control instructions for each traction device based on the power required to be output by each traction device. The first strategy generation unit is used to generate a power supply control strategy based on the control instructions for each traction device.

[0104] According to an embodiment of the present disclosure, the strategy generation submodule includes an AC device control instruction generation unit and a second strategy generation unit. The AC device control instruction generation unit is used to generate a first control instruction for controlling each same-phase power supply device and a second control instruction for controlling an energy scheduling device based on the power required to be output by each traction device; wherein the same-phase power supply device is arranged on a power supply arm between each traction power supply device and the contact network, and is used to convert electrical signals of different phases into electrical signals of the same phase; the energy scheduling device is used to connect the power supply arms between different traction power supply devices, so that the energy received by the contact network can be directly used to power the vehicle. The second strategy generation unit is used to generate a power supply control strategy according to each first control instruction and the second control instruction.

[0105] According to an embodiment of the present disclosure, the above-mentioned device further includes: an energy demand generation module and a control strategy generation module. The energy demand generation module is used to generate the energy demand at the target time based on the energy demand corresponding to the operating condition and the predetermined communication delay. The control strategy generation module is used to generate the control strategy based on the energy demand at the target time and the load state information.

[0106] According to an embodiment of the present disclosure, the control strategy generation module includes a calculation submodule, an acquisition submodule and a control strategy generation submodule. The calculation submodule is used to calculate the operating position at the target moment based on the operating position, operating speed and predetermined communication delay at the current moment. The acquisition submodule is used to obtain the load status information of the target traction power supply equipment that is adjacent to the operating position at the target moment; wherein the power supply distance of the target traction power supply equipment relative to the target vehicle is less than the power supply distance of other traction power supply equipment arranged on the running track relative to the target vehicle. The control strategy generation submodule is used to generate power supply control strategy information for the target traction power supply equipment based on the load status information of the target traction power supply equipment and the energy demand at the target moment.

[0107] According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits, or at least part of the functions of any one of them can be implemented in one module. According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits can be split into multiple modules for implementation. According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits can be at least partially implemented as hardware circuits, such as field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), systems on chips, systems on substrates, systems on packages, application specific integrated circuits (ASICs), or can be implemented by hardware or firmware in any other reasonable way of integrating or packaging circuits, or can be implemented in any one of the three implementation methods of software, hardware, and firmware, or in any appropriate combination of any of them. Alternatively, according to the embodiments of the present invention, one or more of the modules, submodules, units, and subunits can be at least partially implemented as computer program modules, and when the computer program modules are run, the corresponding functions can be performed.

[0108] For example, any multiple of the acquisition module 810 and the generation module 820 can be combined in one module / unit / sub-unit for implementation, or any one of the modules / units / sub-units can be split into multiple modules / units / sub-units. Alternatively, at least part of the functions of one or more of these modules / units / sub-units can be combined with at least part of the functions of other modules / units / sub-units and implemented in one module / unit / sub-unit. According to an embodiment of the present disclosure, at least one of the acquisition module 810 and the generation module 820 can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or can be implemented by hardware or firmware such as any other reasonable way of integrating or packaging the circuit, or implemented in any one of the three implementation methods of software, hardware and firmware or in any appropriate combination of any of them. Alternatively, at least one of the acquisition module 810 and the generation module 820 can be at least partially implemented as a computer program module, and when the computer program module is run, the corresponding function can be executed.

[0109] Fig. 9 A block diagram of an electronic device suitable for implementing the method described above according to an embodiment of the present disclosure is schematically shown. Fig. 9 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0110] like Fig. 9As shown, the electronic device 900 according to an embodiment of the present disclosure includes a processor 901, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 902 or a program loaded from a storage part 908 into a random access memory (RAM) 903. The processor 901 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a dedicated microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 901 may also include an onboard memory for caching purposes. The processor 901 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present disclosure.

[0111] In RAM 903, various programs and data required for the operation of electronic device 900 are stored. Processor 901, ROM 902 and RAM 903 are connected to each other via bus 904. Processor 901 performs various operations of the method flow according to the embodiment of the present disclosure by executing the program in ROM 902 and / or RAM 903. It should be noted that the program can also be stored in one or more memories other than ROM 902 and RAM 903. Processor 901 can also perform various operations of the method flow according to the embodiment of the present disclosure by executing the program stored in the one or more memories.

[0112] According to an embodiment of the present disclosure, the electronic device 900 may further include an input / output (I / O) interface 905, which is also connected to the bus 904. The system 900 may further include one or more of the following components connected to the input / output (I / O) interface 905: an input portion 906 including a keyboard, a mouse, etc.; an output portion 907 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 908 including a hard disk, etc.; and a communication portion 909 including a network interface card such as a LAN card, a modem, etc. The communication portion 909 performs communication processing via a network such as the Internet. A drive 910 is also connected to the input / output (I / O) interface 905 as needed. A removable medium 911, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 910 as needed, so that a computer program read therefrom is installed into the storage portion 908 as needed.

[0113] According to an embodiment of the present disclosure, the method flow according to an embodiment of the present disclosure can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 909, and / or installed from the removable medium 911. When the computer program is executed by the processor 901, the above-mentioned functions defined in the system of the embodiment of the present disclosure are executed. According to an embodiment of the present disclosure, the system, equipment, device, module, unit, etc. described above can be implemented by a computer program module.

[0114] The present disclosure also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiments; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present disclosure is implemented.

[0115] According to an embodiment of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium. For example, it may include, but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, apparatus, or device.

[0116] For example, according to an embodiment of the present disclosure, the computer-readable storage medium may include the ROM 902 and / or the RAM 903 described above and / or one or more memories other than the ROM 902 and the RAM 903 .

[0117] The embodiments of the present disclosure also include a computer program product, which includes a computer program, and the computer program contains program code for executing the method provided by the embodiments of the present disclosure. When the computer program product runs on an electronic device, the program code is used to enable the electronic device to implement the method provided by the embodiments of the present disclosure.

[0118] When the computer program is executed by the processor 901, the above functions defined in the system / device of the embodiment of the present disclosure are executed. According to the embodiment of the present disclosure, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0119] In one embodiment, the computer program may be based on a tangible storage medium such as an optical storage device, a magnetic storage device, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of a signal on a network medium, and downloaded and installed through the communication part 909, and / or installed from a removable medium 911. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0120] According to an embodiment of the present disclosure, the program code for executing the computer program provided by the embodiment of the present disclosure can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (for example, using an Internet service provider to connect through the Internet).

[0121] The embodiments of the present disclosure also include a train, on which the above-mentioned power supply control strategy generating device based on the vehicle-ground integrated system is configured.

[0122] An embodiment of the present disclosure also includes a traction power supply system, which includes: multiple traction power supply devices and an energy management platform, wherein the energy management platform is used to execute the above method to generate a power supply control strategy to control the multiple traction power supply devices to supply power to the contact network.

[0123] Fig.10 A schematic diagram of a DC mode traction power supply system according to an embodiment of the present disclosure is schematically shown.

[0124] like Fig.10As shown in the figure, the traction power supply system newly adds a bidirectional converter and an energy management platform, and the original part of the traction power supply system provides the original voltage and current data to the newly added part. The vehicle system provides the signal system (ATS subsystem) with information such as vehicle operating conditions (traction, braking, coasting), traction braking power, network voltage and network current, and the signal system (ATS subsystem) provides the traction power supply system with the vehicle's operating position and operating speed. The energy management platform obtains the above information, generates control instructions accordingly, and controls the bidirectional converter to provide traction power to the vehicle system according to the instructions. In addition, the operating status data of the traction power supply system can be sent to the ground data center.

[0125] The embodiments of the present disclosure also include another traction power supply system, which includes: multiple traction power supply devices and an energy management platform, and also includes a same-phase power supply device and an energy dispatching device. The same-phase power supply device is configured on the power supply arm between each traction power supply device and the contact network, and is used to convert electrical signals of different phases into electrical signals of the same phase. The energy dispatching device is used to connect the power supply arms between different traction power supply devices so that the energy received by the contact network can be directly used to power the vehicle.

[0126] Fig.11 A schematic diagram of an AC mode traction power supply system according to an embodiment of the present disclosure is schematically shown.

[0127] like Fig.11 As shown in the figure, the traction power supply system newly adds the same-phase power supply equipment, energy dispatching equipment and energy management platform, and the original part of the traction power supply system provides the original voltage and current data to the newly added part. Similarly, the vehicle system provides the signal system (ATS subsystem) with information such as vehicle operating conditions (traction, braking, coasting), traction braking power, network voltage and network current, and the signal system (ATS subsystem) provides the traction power supply system with the vehicle's operating position and operating speed. The energy management platform obtains the above information and generates control instructions accordingly to control the same-phase power supply equipment and energy dispatching equipment to provide traction power supply to the vehicle system according to the instructions. In addition, the operating status data of the traction power supply system can be sent to the ground data center.

[0128] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram may represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box may also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions. It can be understood by those skilled in the art that the features recorded in the various embodiments and / or claims of the present disclosure can be combined and / or combined in a variety of ways, even if such a combination or combination is not explicitly recorded in the present disclosure. In particular, without departing from the spirit and teaching of the present disclosure, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0129] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A method for generating a power supply control strategy based on a vehicle-ground integrated system, characterized in that: The method comprises: Acquiring running status information of the target vehicle on the running track and load status information of the contact network arranged on the running track; wherein the running status information includes energy demand corresponding to the running condition; Based on the energy demand corresponding to the operating condition and the load status information, a power supply control strategy is generated; wherein the power supply control strategy is used to control each traction power supply device to supply power to the contact network to meet the flow distribution threshold of the contact network on the operating track and the energy demand.

2. The method according to claim 1, characterized in that: The load status information includes the load status of each of the traction power supply devices; Based on the energy demand corresponding to the operating condition and the load state information, a power supply control strategy is generated, including: Based on the energy demand corresponding to the operating condition and the load state of each traction power supply device, generating the power required to be output by each traction device; as well as The power supply control strategy is generated based on the power required to be output by each of the traction devices.

3. The method according to claim 2, characterized in that Each of the traction power supply devices is a DC power supply device; The generating the power supply control strategy based on the power required to be output by each of the traction devices includes: generating a control instruction for each of the traction devices based on the power required to be output by each of the traction devices; and The power supply control strategy is generated based on the control instructions of each of the traction devices.

4. The method according to claim 2, characterized in that: Each of the traction power supply devices is an AC power supply device; The generating the power supply control strategy based on the power required to be output by each of the traction devices includes: Based on the power required to be output by each of the traction devices, a first control instruction for controlling each same-phase power supply device and a second control instruction for controlling an energy dispatching device are generated; wherein the same-phase power supply device is arranged on a power supply arm between each traction power supply device and the contact network, and is used to convert electrical signals of different phases into electrical signals of the same phase; the energy dispatching device is used to connect the power supply arms between different traction power supply devices, so that the energy received by the contact network can be directly used to power the vehicle; and The power supply control strategy is generated according to each of the first control instructions and the second control instructions.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: generating an energy demand at a target time based on the energy demand corresponding to the operating condition and the predetermined communication delay; and The control strategy is generated based on the energy demand at the target moment and the load status information.

6. The method according to claim 5, characterized in that The running status information also includes: the running position and running speed at the current moment; The generating the control strategy based on the energy demand at the target time and the load state information includes: Based on the running position at the current moment, the running speed and the predetermined communication delay, the running position at the target moment is calculated; Obtaining load status information of a target traction power supply device that is adjacent to the running position at the target time; wherein the power supply distance of the target traction power supply device relative to the target vehicle is shorter than the power supply distance of other traction power supply devices arranged on the running track relative to the target vehicle; and Based on the load state information of the target traction power supply equipment and the energy demand at the target moment, power supply control strategy information for the target traction power supply equipment is generated.

7. A power supply control strategy generation device based on a vehicle-ground integrated system, comprising: An acquisition module, used to acquire the running state information of the target vehicle on the running track and the load state information of the contact network arranged on the running track; wherein the running state information includes the energy demand corresponding to the running condition; A generation module is used to generate a power supply control strategy based on the energy demand corresponding to the operating condition and the load status information; wherein the power supply control strategy is used to control each traction power supply device to supply power to the contact network to meet the flow distribution threshold of the contact network on the operating track and the energy demand.

8. A train comprising: The train is equipped with the device described in claim 7.

9. A traction power supply system, comprising: Multiple traction power supply equipment; An energy management platform is used to execute the method described in any one of claims 1 to 3 or claims 5 to 6 to generate a power supply control strategy to control the multiple traction power supply devices to supply power to the contact network.

10. The traction power supply system according to claim 9, further comprising: A same-phase power supply device, arranged on a power supply arm between each of the traction power supply devices and the contact network, for converting electrical signals of different phases into electrical signals of the same phase; Energy dispatching equipment is used to connect the power supply arms between different traction power supply equipment so that the energy received by the contact network can be directly used to power the vehicle.

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