Railway power supply control method and system

Abstract

The embodiment of the invention relates to the technical field of railway power supply, and discloses a railway power supply control method and system, and the method comprises the steps: firstly obtaining the working load states of a first gateway device and a second gateway device, determining a target gateway device according to the working load states, and transmitting the state data of a power supply transformer monitored by a detection sensor to a cloud server through the target gateway device. And then, analyzing the data by using a transformer state evaluation model preset by the cloud server, and generating a power supply control instruction according to an analysis result. If the temperature of the power supply transformer is abnormal, generating a first control instruction, controlling cooling equipment to start cooling and performing small-amplitude adjustment on output voltage or current; and if the voltage or current is abnormal, a second control instruction is generated, and the output voltage or current is greatly adjusted. Therefore, accuracy and timeliness of power supply control are guaranteed, and stability and safety of railway power supply are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway power supply, and particularly relates to a railway power supply control method and system. Background Art

[0002] As a key infrastructure for railway operation, the stable operation of the railway power supply system is crucial for ensuring the safety and efficiency of railway transportation. In the railway power supply system, a power supply transformer boosts the municipal power voltage to a high voltage to provide power support for various devices along the railway. With the continuous development of railways, the scale and complexity of the railway power supply system have increased day by day, posing higher requirements for the accuracy and reliability of power supply control.

[0003] In recent years, the degree of intelligence of the railway power supply system has been continuously improved. Through technical means such as introducing detection sensors for power supply status monitoring, real-time monitoring of the status of the power supply transformer and accurate fault warning have been achieved. However, in the actual operation process, due to the complex and changeable railway power supply environment, abnormal transmission of the status data of the power supply transformer may occur, thereby affecting the accuracy and timeliness of power supply control. Summary of the Invention

[0004] The main purpose of the present invention is to provide a railway power supply control method and system, aiming to solve the technical problem that the working load status of the communication gateway device in the prior art is easily affected by various factors, resulting in abnormal transmission of the status data of the power supply transformer, thereby affecting the accuracy and timeliness of power supply control.

[0005] To achieve the above object, in a first aspect, an embodiment of the present application provides a railway power supply control method, which is applied to a railway power supply system. The railway power supply system includes a power supply transformer, a detection sensor, a first gateway device, a second gateway device, a cooling device, and a cloud server. The power supply transformer is used to boost the municipal power voltage to obtain a high voltage for railway power supply. The detection sensor is used to monitor the status of the power supply transformer. The first gateway device and the second gateway device are used to send the status data of the power supply transformer to the cloud server and receive the power supply control instructions from the cloud server. The cloud server is used to receive and process the status data of the power supply transformer to obtain power supply control instructions. The cooling device is used to cool the power supply transformer according to the power supply control instructions. The method includes: Obtain the working load status of the first gateway device and the second gateway device; Determine a target gateway device among the first gateway device and the second gateway device according to the working load status of the first gateway device and the second gateway device; Send the status data of the power supply transformer monitored by the detection sensor to the cloud server through the target gateway device; Analyze the power supply transformer status data by using the power supply transformer status evaluation model preset in the cloud server, and the analysis result is used to characterize whether the operating status of the power supply transformer is normal; Generate a power supply control instruction according to the analysis result. Among them, when the temperature of the power supply transformer is abnormal, the cloud server generates a first control instruction, and the first control instruction is used to control the cooling equipment to start cooling the power supply transformer and adjust the output voltage or current of the power supply transformer by a first amplitude; when the voltage or current of the power supply transformer is abnormal, the cloud server generates a second control instruction, and the second control instruction is used to control the output voltage or current of the power supply transformer to be adjusted by a second amplitude, and the second amplitude is greater than the first amplitude.

[0006] In a possible implementation manner, the workload status includes the working temperature of the gateway device, and obtaining the workload status of the first gateway device and the second gateway device includes: Obtain the current surface temperatures of the first gateway device and the second gateway device respectively; Correct the current surface temperature according to the working temperature rise data of the first gateway device and the second gateway device to obtain the working temperatures of the first gateway device and the second gateway device. The working temperature rise data is used to characterize the rising amplitude of the internal temperature of the gateway device relative to the surface temperature during normal operation.

[0007] In a possible implementation manner, the correcting the current surface temperature according to the working temperature rise data of the first gateway device and the second gateway device to obtain the working temperatures of the first gateway device and the second gateway device includes: Obtain the initial working temperature rise data of the first gateway device and the second gateway device; Perform a first correction on the initial working temperature rise data according to the working cumulative duration of the first gateway device and the second gateway device to obtain the target working temperature rise data; Perform a second correction on the current surface temperature according to the target working temperature rise data of the first gateway device and the second gateway device to obtain the working temperatures of the first gateway device and the second gateway device.

[0008] In a possible implementation manner, the performing a first correction on the initial working temperature rise data according to the working cumulative duration of the first gateway device and the second gateway device to obtain the target working temperature rise data includes: When the working cumulative duration of the first gateway device and the second gateway device is greater than the first preset duration and less than the second preset duration, correct the initial working temperature rise data according to the first preset ratio to obtain the target working temperature rise data; When the cumulative working duration of the first gateway device and the second gateway device is greater than or equal to a second preset duration, the initial working temperature rise data is corrected according to a second preset ratio to obtain target working temperature rise data, where the second preset ratio is greater than the first preset ratio.

[0009] In a possible implementation, the determining the target gateway device from the first gateway device and the second gateway device according to the working load status of the first gateway device and the second gateway device includes: When the working load statuses of both the first gateway device and the second gateway device exceed a preset status, obtain the historical communication data of the first gateway device and the second gateway device; Determine the communication stability degrees of the first gateway device and the second gateway device according to the historical communication data of the first gateway device and the second gateway device; Determine the gateway device with a higher communication stability degree among the first gateway device and the second gateway device as the target gateway device.

[0010] In a possible implementation, the historical communication data includes the number of communication interruptions and the total number of communication attempts, the number of connection establishment failures and the total number of connection attempts, and the cumulative duration with signal strength lower than a threshold and the total monitoring duration within a past preset time period; the determining the communication stability degrees of the first gateway device and the second gateway device according to the historical communication data of the first gateway device and the second gateway device includes: Input the historical communication data of the first gateway device and the second gateway device into a pre-trained communication stability evaluation model respectively to obtain the communication stability degree scores of each gateway device, and the communication stability evaluation model satisfies the following expression: + + ) where W is the communication stability degree score of the gateway device, and are respectively the number of communication interruptions and the total number of communication attempts of the corresponding gateway device within a past preset time period, and are respectively the cumulative duration with signal strength lower than the threshold and the total monitoring duration of the corresponding gateway device, and are respectively the number of connection establishment failures and the total number of connection attempts of the corresponding gateway device, P 1 、P 2 、P 3 are the influence weights of each index on communication stability.

[0011] In a possible implementation, determining the gateway device with a higher communication stability among the first gateway device and the second gateway device as the target gateway device includes: Determining the gateway device with a higher communication stability among the first gateway device and the second gateway device as the target gateway device for communication for a first preset duration preferentially; After the communication for the first preset duration ends, determining the gateway device with a lower communication stability as the target gateway device for communication for a second preset duration, where the first preset duration is greater than the second preset duration; Taking the gateway device with a higher communication stability among the first gateway device and the second gateway device as the target gateway device for communication for a first preset duration, and taking the gateway device with a lower communication stability among the first gateway device and the second gateway device as the target gateway device for communication for a second preset duration, and alternately and cyclically switching the target gateway device.

[0012] In a possible implementation, during the process of alternately and cyclically switching the target gateway device, the method further includes: Monitoring the real-time communication status of the current target gateway device. If it is determined that the communication stability of the current target gateway device drops sharply or the communication is interrupted, immediately switch to the other gateway device for communication.

[0013] In a possible implementation, analyzing the power supply transformer status data by using a transformer status evaluation model preset by a cloud server to obtain an analysis result includes: The power supply transformer status evaluation model is based on a deep learning algorithm to extract and analyze features of the input power supply transformer status data, and the power supply transformer status data includes output current data, output voltage data, and temperature data of the power supply transformer; Based on the analysis result, if it is determined that the temperature of the power supply transformer exceeds a preset threshold range and the temperature change rate exceeds a preset value, it is determined that the temperature of the power supply transformer is abnormal; Based on the analysis result, if it is determined that the current or voltage exceeds a preset threshold range and the fluctuation amplitude exceeds a preset value, it is determined that the current or voltage of the power supply transformer is abnormal.

[0014] In a second aspect, an embodiment of the present application further provides a railway power supply system, including a power supply transformer, a detection sensor, a first gateway device, a second gateway device, a cooling device, and a cloud server. The power supply transformer is used to boost the mains voltage to obtain a high voltage for railway power supply. The detection sensor is used to monitor the status of the power supply transformer. The first gateway device and the second gateway device are used to send the status data of the power supply transformer to the cloud server and receive the power supply control instructions from the cloud server. The cloud server is used to receive and process the status data of the power supply transformer to obtain power supply control instructions. The cooling device is used to cool the power supply transformer according to the power supply control instructions; and, a memory and a processor. The memory is used to store program codes, and the processor is used to call the program codes to execute the method as described in the first aspect.

[0015] Different from the prior art, the railway power supply control method provided by the embodiment of the present application first obtains the working load status of the first and second gateway devices, determines the target gateway device based on this, and sends the status data of the power supply transformer monitored by the detection sensor to the cloud server through the target gateway device. Then, the cloud server uses the preset transformer status evaluation model to analyze the data and generates power supply control instructions according to the analysis results. If the temperature of the power supply transformer is abnormal, a first control instruction is generated to control the cooling device to start cooling and make a small adjustment to the output voltage or current; if the voltage or current is abnormal, a second control instruction is generated to make a large adjustment to the output voltage or current. Through reasonable device status monitoring and data transmission, as well as accurate instruction generation and control, this solution realizes the effective management of the power supply transformer in the railway power supply system, not only ensuring the accuracy and timeliness of power supply control, but also improving the stability and safety of railway power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a schematic diagram of the functional module structure of the railway power supply system in some embodiments of the present application; Figure 2 It is a schematic flowchart of the railway power supply control method in some embodiments of the present application; Figure 3 It is a schematic flowchart of the railway power supply control method in some other embodiments of the present application; Figure 4 It is a schematic diagram of the hardware structure of the railway power supply system in some embodiments of the present application.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0021] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution that A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] As a key infrastructure for railway operation, the stable operation of the railway power supply system is crucial for ensuring the safety and efficiency of railway transportation. In the railway power supply system, the power supply transformer boosts the municipal power voltage to a high voltage to provide power support for various devices along the railway. With the continuous development of railways, the scale and complexity of the railway power supply system are increasing day by day, posing higher requirements for the accuracy and reliability of power supply control.

[0023] In recent years, the intelligence level of the railway power supply system has been continuously improved. Through technical means such as introducing detection sensors for power supply status monitoring, real-time monitoring of the power supply transformer status and accurate fault warning have been achieved. However, during the actual operation process, due to the complex and changeable railway power supply environment, abnormal transmission of the power supply transformer status data may occur, thus affecting the accuracy and timeliness of power supply control.

[0024] To solve the above problems, as Figure 1 shown, an embodiment of the present application provides a railway power supply system. The railway power supply system includes a power supply transformer 100, a detection sensor 200, a first gateway device 300, a second gateway device 400, a cooling device 500 and a cloud server 600. The power supply transformer 100 is used to boost the mains voltage to obtain a high voltage for railway power supply. The detection sensor 200 is used to monitor the status of the power supply transformer 100. The first gateway device 300 and the second gateway device 400 are used to send the status data of the power supply transformer 100 to the cloud server 600 and receive the power supply control instructions from the cloud server 600. The cloud server 600 is used to receive and process the status data of the power supply transformer 100 to obtain power supply control instructions. The cooling device 500 is used to cool the power supply transformer 600 according to the power supply control instructions. The cooling device 500 can be an air-cooling device or a liquid-cooling device, which is not limited here.

[0025] It can be understood that in the technical solution of the present application, the power supply transformer configured in the railway power supply system is responsible for boosting the mains voltage to meet the railway power supply requirements. The detection sensor monitors the status of the power supply transformer in real time. The first gateway device and the second gateway device are responsible for data transmission and instruction reception. The cloud server, as the core processing unit, receives and analyzes the status data to generate accurate power supply control instructions. At the same time, the system is also equipped with a cooling device to perform necessary cooling processing on the power supply transformer according to the instructions.

[0026] During operation, the status detection data of the power supply transformer is sent to the cloud server through the first gateway device or the second gateway device for data analysis to timely determine whether the status of the power supply transformer is normal. When the status of the power supply transformer is abnormal, the cloud server sends a power supply control instruction to the corresponding gateway device to perform corresponding power supply control on the power supply transformer. Through the intelligent data processing and response mechanism of the system and the powerful computing ability of the cloud server, the high efficiency, safety and stability of railway power supply are ensured.

[0027] As Figures 1-3 shown, the following takes the railway power supply system executing the railway power supply control method as an example for illustration. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order from here. Please refer to the appendixFigure 2 , the method includes the following steps S200 - step S1000: Step S200, obtain the workload status of the first gateway device and the second gateway device; The workload status of the gateway device can be the working duration or working temperature of the gateway device, etc. It can be understood that the longer the cumulative working duration of the gateway device, the greater its workload, and the lower its communication performance or stability; the higher the working temperature of the gateway device, the greater its workload, and the lower its communication performance or stability. In other application scenarios, the working duration and working temperature of the gateway device can also be comprehensively considered to obtain its workload status.

[0028] In an embodiment, the workload status is the working temperature of the gateway device. The step S200: obtain the workload status of the first gateway device and the second gateway device includes: respectively obtain the current surface temperatures of the first gateway device and the second gateway device; correct the current surface temperatures according to the working temperature rise data of the first gateway device and the second gateway device to obtain the working temperatures of the first gateway device and the second gateway device, where the working temperature rise data is used to characterize the rising amplitude of the internal temperature of the gateway device relative to the surface temperature during normal operation.

[0029] The working temperature of the gateway device refers to the stable temperature inside the gateway device when it starts to work, that is, the temperature stable value or temperature stable range in the working state of the gateway device, and the current surface temperature of the gateway device refers to the current temperature on the surface of the gateway device when it has not started to work. It can be understood that the working temperature of the gateway device has a greater impact on the communication performance of the gateway device. Therefore, if only the current surface temperature of the gateway device is detected, it is impossible to determine which gateway device is suitable to be used as the target gateway device for data communication. That is to say, there is a large error in selecting the target gateway device based on the current surface temperature of the gateway device.

[0030] Therefore, to improve the timeliness and accuracy of power supply control, in the embodiments of the present application, first, the current surface temperatures of the first gateway device and the second gateway device are respectively obtained, and then the current surface temperatures are corrected according to the working temperature rise data of the first gateway device and the second gateway device to obtain the working temperatures of the first gateway device and the second gateway device. Finally, the target gateway device can be determined according to the working temperatures of the first gateway device and the second gateway device. For example, select the gateway device with a lower working temperature as the target gateway device for communication.

[0031] It can be understood that since the working temperature rise data of the gateway device is not fixed and is affected by various factors. For example, when the usage time of the gateway device exceeds a certain duration, the degree of internal hardware aging increases, and its working temperature rise increases significantly. Therefore, in one embodiment, the step of correcting the current surface temperature according to the working temperature rise data of the first gateway device and the second gateway device to obtain the working temperatures of the first gateway device and the second gateway device includes: obtaining the initial working temperature rise data of the first gateway device and the second gateway device; performing a first correction on the initial working temperature rise data according to the working cumulative duration of the first gateway device and the second gateway device to obtain the target working temperature rise data; and performing a second correction on the current surface temperature according to the target working temperature rise data of the first gateway device and the second gateway device to obtain the working temperatures of the first gateway device and the second gateway device.

[0032] The initial working temperature rise data refers to the most original working temperature rise amplitude calibrated according to the performance parameters of each internal hardware when the gateway device leaves the factory.

[0033] In one embodiment, the initial working temperature rise data of the first gateway device can be first corrected according to the working cumulative duration of the first gateway device to obtain the target working temperature rise data of the first gateway device, and then the current surface temperature of the first gateway device can be second-corrected according to the target temperature rise data of the first gateway device to obtain the working temperature of the first gateway device. Similarly, the initial working temperature rise data of the second gateway device can be first corrected according to the working cumulative duration of the second gateway device to obtain the target working temperature rise data of the second gateway device, and then the current surface temperature of the second gateway device can be second-corrected according to the target temperature rise data of the second gateway device to obtain the working temperature of the second gateway device. Both the first correction and the second correction can be performed according to a certain ratio.

[0034] Specifically, when the working cumulative duration of the first gateway device and the second gateway device is greater than the first preset duration and less than the second preset duration, it indicates that the load of the gateway device is relatively large, and the current working temperature rise data has a relatively small increase compared to the initial working temperature rise data. At this time, the initial working temperature rise data is corrected according to the first preset ratio to obtain the target working temperature rise data; when the working cumulative duration of the first gateway device and the second gateway device is greater than or equal to the second preset duration, it indicates that the load of the gateway device is very large, and the current working temperature rise data has a relatively large increase compared to the initial working temperature rise data. At this time, the initial working temperature rise data is corrected according to the second preset ratio to obtain the target working temperature rise data, where the second preset ratio is greater than the first preset ratio.

[0035] For example, if the current surface temperature of the first gateway device is T1, the initial working temperature rise data is R1, and the cumulative working duration is greater than the first preset duration and less than the second preset duration (for example, between 100 h and 300 h), the initial working temperature rise data is first corrected according to the first preset ratio K1 to obtain the target working temperature rise data of R1*K1, and the current surface temperature is second corrected according to the target temperature rise data to obtain the working temperature of the second gateway device as T1*R1*K1. If the current surface temperature of the first gateway device is T1, the initial working temperature rise data is R1, and the cumulative working duration is greater than or equal to the second preset duration (reaching 300 h), the initial working temperature rise data is first corrected according to the second preset ratio K2 to obtain the target working temperature rise data of R1*K2, and the current surface temperature is second corrected according to the target temperature rise data to obtain the working temperature of the second gateway device as T1*R1*K2. Similarly, the working temperature of the second gateway device is calculated, which is similar to the calculation process of the first gateway device and will not be elaborated here.

[0036] Step S400: Determine a target gateway device from the first gateway device and the second gateway device according to the working load status of the first gateway device and the second gateway device; It can be understood that the lower the working load of the gateway device, the higher its communication performance or communication stability. Therefore, when the working load status of both the first gateway device and the second gateway device does not exceed the load threshold, or one of them is overloaded while the other is not, taking the gateway device with the lower working load among the first gateway device and the second gateway device as the target gateway device can ensure the timeliness and stability of data communication. When the working load status of both the first gateway device and the second gateway device exceeds the load threshold, there is a risk of communication interruption when communicating through any one of the gateway devices.

[0037] Based on this, in one embodiment, step S400: Determine a target gateway device from the first gateway device and the second gateway device according to the working load status of the first gateway device and the second gateway device, includes: Step S410: When the working load status of both the first gateway device and the second gateway device exceeds the preset status, obtain the historical communication data of the first gateway device and the second gateway device; Step S420: Determine the communication stability degree of the first gateway device and the second gateway device according to the historical communication data of the first gateway device and the second gateway device; Step S430: Determine the gateway device with the higher communication stability degree among the first gateway device and the second gateway device as the target gateway device.

[0038] Specifically, when the workloads of both gateway devices are relatively high, that is, both exceed the preset load state, since there is a risk of communication interruption when any gateway device communicates, it is difficult to make the best choice based solely on the current workload state. Therefore, it is necessary to additionally consider their historical performance. More specifically, the historical communication data of the first gateway device and the second gateway device can be retrieved from the storage system first, or a data request can be sent to obtain the historical communication data of the first gateway device and the second gateway device. These data can include key metrics such as communication connection success rate, communication success rate, packet loss rate, and communication delay time. Then, by analyzing the historical communication data, the communication stability of the two gateway devices is evaluated. Finally, the gateway device with a higher communication stability in the historical communication is used as the target gateway device. In this way, using the gateway device with a higher communication stability in the historical communication as the target gateway device can greatly reduce the risk of communication interruption and further improve the stability of railway power supply.

[0039] In one embodiment, the historical communication data includes the number of communication interruptions and the total number of communication attempts within a preset past time period, the number of connection establishment failures and the total number of connection attempts, the cumulative duration when the signal strength is lower than the threshold and the total monitoring duration; the step S420: determining the communication stability of the first gateway device and the second gateway device according to the historical communication data of the first gateway device and the second gateway device includes: Inputting the historical communication data of the first gateway device and the second gateway device into a pre-trained communication stability evaluation model respectively to obtain the communication stability scores of each gateway device, and the communication stability evaluation model satisfies the following expression: + + ) Wherein, W is the communication stability score of the gateway device, and are respectively the number of communication interruptions and the total number of communication attempts of the corresponding gateway device within a preset past time period, and are respectively the cumulative duration when the signal strength of the corresponding gateway device is lower than the threshold and the total monitoring duration, and are respectively the number of connection establishment failures and the total number of connection attempts of the corresponding gateway device, P 1 、P 2 、P 3 are the influence weights of each index on communication stability.

[0040] Specifically, inputting the historical communication data of the first gateway device into + + ), obtain the communication stability score W1 of the first gateway device, and input the historical communication data of the second gateway device into + + ), and obtain the communication stability score of the second gateway device .

[0041] The number of communication interruptions reflects the situation where the connection of the gateway device is unexpectedly disconnected during operation. The total number of communication attempts serves as a reference base. Through the proportional relationship between the two, the frequency of communication interruptions can be understood. For example, if there are 10 communication interruptions in 100 total communication attempts, then the proportion of communication interruptions is 10%. A higher proportion of communication interruptions means poorer communication stability.

[0042] represents the ratio of the number of communication interruptions of the first gateway device to the total number of communication attempts. The higher this ratio, the more frequent the communication interruptions, and the greater the negative impact on the communication stability, so the communication stability score will be reduced.

[0043] The number of connection establishment failures reflects the situation where the gateway device fails when attempting to establish a connection with the target device (such as a cloud server). Similarly, by comparing with the total number of connection attempts, the probability of connection establishment failure can be obtained. For example, if there are 5 connection establishment failures in 50 total connection attempts, the failure probability is 10%. The higher the probability of connection establishment failure, the worse the stability of the gateway device in the connection establishment stage.

[0044] represents the ratio of the number of connection establishment failures of the first gateway device to the total number of connection attempts. The higher the ratio, the more unstable the connection establishment process, and the score will also be reduced.

[0045] The cumulative duration with signal strength below the threshold represents the total duration during which the signal strength of the gateway device is in a weak state (below the set threshold) during operation. The total monitoring duration is the total duration of monitoring the signal strength of the gateway device. The proportional relationship between the two reflects the proportion of the poor signal strength state in the entire monitoring process. For example, in a total monitoring duration of 1 hour (3600 seconds), the cumulative duration with signal strength below the threshold is 600 seconds, then the proportion of poor signal strength is 1 / 6. The higher the proportion of poor signal strength, the greater the degree to which the gateway communication is affected by the signal strength, that is, the poorer the communication stability.

[0046] represents the ratio of the cumulative duration with signal strength below the threshold of the first gateway device to the total monitoring duration. The higher this ratio, the more serious the situation of poor signal strength, and it will also reduce the communication stability score.

[0047] Through the above model calculation, the communication stability of the two gateway devices can be quantified, so that the score can be used to decide which device to use as the target gateway device, ensuring that the gateway device with higher communication stability is used for data transmission and communication.

[0048] It should be noted that since gateway data transmission requires extremely high connection stability, P can be appropriately increased. 3 The value of makes the number of connection establishment failures account for a larger proportion in evaluating the communication stability, thus paying more attention to the stability of the connection establishment phase. 1 Assign a value of 0.3, P 2 Assign a value of 0.3, P 3 Assign a value of 0.4.

[0049] As described above, when the workload status of the first gateway device and the second gateway device exceeds the load threshold, there is a risk of communication interruption when communicating through any gateway device. Even if a gateway device with a higher historical communication stability is used as the target gateway device for communication, there is still a certain probability of communication interruption risk.

[0050] Therefore, in one embodiment, determining the first gateway device and the second gateway device with higher communication stability as the target gateway device includes: determining the first gateway device and the second gateway device with higher communication stability as the target gateway device for communication for a first preset duration; after the communication for the first preset duration ends, determining the lower communication stability as the target gateway device for communication for a second preset duration, wherein the first preset duration is greater than the second preset duration; using the first gateway device and the second gateway device with higher communication stability as the target gateway device for communication for the first preset duration, and using the first gateway device and the second gateway device with lower communication stability as the target gateway device for communication for the second preset duration, alternately switching the target gateway device in a cyclical manner.

[0051] It is understandable that when the workload of both gateway devices exceeds the load threshold, even if a gateway device with a higher communication stability is selected as the target gateway based on historical communication data, there is still a risk of communication interruption. In order to reduce this risk, the embodiment of the present application proposes an alternating cyclic switching strategy.

[0052] Specifically, first, determine the gateway device with higher communication stability among the two gateway devices according to historical communication data, and preferentially use it as the target gateway device for communication for a first preset duration. During this period, use the gateway device with higher communication stability for data communication. The first preset duration is set as a relatively long time period to make full use of the higher communication stability of this gateway device. After the communication for the first preset duration ends, switch to the gateway device with lower communication stability for communication for a second preset duration. The second preset duration is set as a relatively short time period to reduce the possible risks caused by the lower communication stability. After completing the communication for the second preset duration, switch back to the gateway device with higher communication stability for the next round of communication for the first preset duration. By alternating and cycling in this way, it can prevent the first gateway device or the second gateway device from continuing to work for a long time under an already overloaded situation, resulting in a further increase in the workload, thereby further improving the stability of data transmission. And during the process of alternately cycling and switching the target gateway device, the real-time communication status of the current target gateway device can be monitored in real time. If it is found that the communication stability of the current target gateway device drops sharply or the communication is interrupted, immediately switch to the other gateway device for communication.

[0053] Step S600: Send the power supply transformer status data monitored by the detection sensor to the cloud server through the target gateway device; After determining the target gateway device, send the power supply transformer status data monitored by the detection sensor to the cloud server through the determined target gateway device.

[0054] Step S800: Use the transformer status evaluation model preset in the cloud server to analyze the power supply transformer status data, and the analysis result is used to characterize whether the operation status of the power supply transformer is normal; The cloud server uses the preset transformer status evaluation model to deeply analyze the received data to obtain whether the operation status of the power supply transformer is normal. This step makes full use of the powerful processing ability of cloud computing and improves the accuracy and efficiency of the analysis.

[0055] Specifically, the power supply transformer status evaluation model built in the cloud server is based on a deep learning algorithm to extract and analyze the features of the input power supply transformer status data. The power supply transformer status data includes the output current data, output voltage data, and temperature data of the power supply transformer; when it is determined that the temperature of the power supply transformer exceeds the preset threshold range and the temperature change rate exceeds the preset value, it is determined that the temperature of the power supply transformer is abnormal; when it is determined that the current or voltage exceeds the preset threshold range and the fluctuation amplitude exceeds the preset value, it is determined that the current or voltage of the power supply transformer is abnormal.

[0056] Step S1000: Generate a power supply control instruction according to the analysis result. When the temperature of the power supply transformer is abnormal, the cloud server generates a first control instruction, which is used to control the cooling device to start cooling the power supply transformer and adjust the output voltage or current of the power supply transformer by a first amplitude; when the voltage or current of the power supply transformer is abnormal, the cloud server generates a second control instruction, which is used to control the output voltage or current of the power supply transformer to be adjusted by a second amplitude, and the second amplitude is greater than the first amplitude.

[0057] The first amplitude refers to the small adjustment of the output voltage or current of the transformer in the first control instruction generated by the cloud server when the temperature of the transformer is abnormal. In this way, without affecting the stability of the power supply system, the load of the transformer can be reduced by finely adjusting the output voltage or current, which helps to dissipate heat and reduce the temperature.

[0058] The second amplitude refers to the large adjustment of the output voltage or current of the transformer in the second control instruction generated by the cloud server when the voltage or current of the transformer is abnormal. The goal is to quickly restore the stability of the power supply system and prevent equipment damage or power supply interruption caused by abnormal voltage or current.

[0059] In this way, in the embodiment of the present application, for abnormal temperature (a minor abnormal state), only the cooling device needs to be started and the output voltage or current needs to be slightly adjusted to ensure the stability of railway power supply; for abnormal voltage or current (a severe abnormal state), more urgent control measures are taken to quickly and greatly reduce the output voltage or current to ensure the safety of railway power supply.

[0060] As Figure 4 shown, Figure 4 is a schematic diagram of the hardware structure of the railway power supply system in some embodiments of the present application. The railway power supply system provided in the embodiment of the present application further includes a memory 1000 and a processor 2000. The memory 1000 is used to store computer-readable instructions, and the processor 2000 is used to call the computer-readable instructions to execute the railway power supply control method as described above.

[0061] Among them, the processor 2000 is used to provide computing and control capabilities to control the railway power supply system to perform corresponding tasks. For example, it controls the railway power supply system to execute the railway power supply control method in any of the above method embodiments. The method includes: obtaining the workload status of the first gateway device and the second gateway device; determining the target gateway device among the first gateway device and the second gateway device according to the workload status of the first gateway device and the second gateway device; sending the power supply transformer status data monitored by the detection sensor to the cloud server through the target gateway device; analyzing the power supply transformer status data by using the transformer status evaluation model preset in the cloud server to obtain an analysis result, and the analysis result is used to characterize whether the operation status of the power supply transformer is normal; generating a power supply control instruction according to the analysis result. Among them, when the temperature of the power supply transformer is abnormal, the cloud server generates a first control instruction, and the first control instruction is used to control the cooling device to start cooling the power supply transformer and adjust the output voltage or current of the power supply transformer by a first amplitude; when the voltage or current of the power supply transformer is abnormal, the cloud server generates a second control instruction, and the second control instruction is used to control the output voltage or current of the power supply transformer to be adjusted by a second amplitude, and the second amplitude is greater than the first amplitude.

[0062] The processor 2000 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0063] The memory 1000, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the railway power supply control method in the embodiments of the present application. By running the non-transitory software programs, instructions, and modules stored in the memory 1000, the processor 2000 can implement the railway power supply control method in any of the above method embodiments.

[0064] Specifically, the memory 1000 may include volatile memory (VM), such as random access memory (RAM); the memory 1000 may also include non-volatile memory (NVM), such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), or other non-transitory solid-state storage devices; the memory 1000 may further include a combination of the above types of memories.

[0065] In summary, the railway power supply system of the present application adopts the technical solution of any one of the above railway power supply control method embodiments. Therefore, it has at least the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0066] The embodiments of the present application also provide a computer-readable storage medium, such as a memory including program codes, and the above program codes can be executed by a processor to complete the railway power supply control method in the above embodiments. For example, the computer-readable storage medium may be read-only memory (ROM), random access memory (RAM), compact disc read-only memory (CDROM), magnetic tape, floppy disk, and optical data storage devices, etc.

[0067] The embodiments of the present application also provide a computer program product, which includes one or more program codes, and the program codes are stored in a computer-readable storage medium. The processor of the railway power supply system reads the program codes from the computer-readable storage medium, and the processor executes the program codes to complete the steps of the railway power supply control method provided in the above embodiments.

[0068] Those of ordinary skill in the art can understand that all or part of the steps to implement the above embodiments can be completed by hardware, or can be completed by hardware related to program code. The program can be stored in a computer-readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk, an optical disk, or the like.

[0069] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0070] Through the description of the above embodiments, those of ordinary skill in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0071] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A railway power supply control method, characterized in that: Applied to a railway power supply system, the railway power supply system includes a power supply transformer, a detection sensor, a first gateway device, a second gateway device, a cooling device and a cloud server, the power supply transformer is used to boost the mains voltage to obtain a high voltage for railway power supply, the detection sensor is used to monitor the status of the power supply transformer, the first gateway device and the second gateway device are used to send power supply transformer status data to the cloud server and receive power supply control instructions from the cloud server, the cloud server is used to receive and process the power supply transformer status data to obtain a power supply control instruction, and the cooling device is used to cool the power supply transformer according to the power supply control instruction; the method includes: Obtaining workload status of the first gateway device and the second gateway device; Determining a target gateway device in the first gateway device and the second gateway device according to the workload status of the first gateway device and the second gateway device; Sending the power transformer status data monitored by the detection sensor to the cloud server through the target gateway device; Analyze the power transformer status data using the transformer status assessment model preset by the cloud server to obtain an analysis result, wherein the analysis result is used to characterize whether the operating status of the power transformer is normal; A power supply control instruction is generated according to the analysis result, wherein, when the temperature of the power supply transformer is abnormal, the cloud server generates a first control instruction, and the first control instruction is used to control the cooling device to start cooling the power supply transformer and adjust the output voltage or current of the power supply transformer by a first amplitude; when the voltage or current of the power supply transformer is abnormal, the cloud server generates a second control instruction, and the second control instruction is used to control the output voltage or current of the power supply transformer to be adjusted by a second amplitude, and the second amplitude is greater than the first amplitude.

2. The railway power supply control method according to claim 1, characterized in that: The workload status includes the operating temperature of the gateway device, and the acquiring the workload status of the first gateway device and the second gateway device includes: respectively obtaining current surface temperatures of the first gateway device and the second gateway device; The current surface temperature is corrected according to the operating temperature rise data of the first gateway device and the second gateway device to obtain the operating temperatures of the first gateway device and the second gateway device. The operating temperature rise data is used to characterize the increase in the internal temperature of the gateway device relative to the surface temperature when the gateway device is working normally.

3. The railway power supply control method according to claim 2, characterized in that: The correcting the current surface temperature according to the operating temperature rise data of the first gateway device and the second gateway device to obtain the operating temperature of the first gateway device and the second gateway device includes: Obtaining initial operating temperature rise data of the first gateway device and the second gateway device; Performing a first correction on the initial operating temperature rise data according to the accumulated operating time of the first gateway device and the second gateway device to obtain target operating temperature rise data; A second correction is performed on the current surface temperature according to the target operating temperature rise data of the first gateway device and the second gateway device to obtain the operating temperatures of the first gateway device and the second gateway device.

4. The railway power supply control method according to claim 3, characterized in that: The first correction of the initial operating temperature rise data according to the accumulated operating time of the first gateway device and the second gateway device to obtain the target operating temperature rise data includes: When the cumulative working time of the first gateway device and the second gateway device is greater than the first preset time and less than the second preset time, the initial working temperature rise data is corrected according to the first preset ratio to obtain the target working temperature rise data; When the accumulated working time of the first gateway device and the second gateway device is greater than or equal to the second preset time, the initial working temperature rise data is corrected according to the second preset ratio to obtain the target working temperature rise data, wherein the second preset ratio is greater than the first preset ratio.

5. The railway power supply control method according to claim 1, characterized in that: The determining a target gateway device in the first gateway device and the second gateway device according to the workload status of the first gateway device and the second gateway device comprises: When the workload states of the first gateway device and the second gateway device both exceed a preset state, acquiring historical communication data of the first gateway device and the second gateway device; Determining the communication stability between the first gateway device and the second gateway device according to the historical communication data of the first gateway device and the second gateway device; The first gateway device and the second gateway device having a higher communication stability are determined as the target gateway device.

6. The railway power supply control method according to claim 5, characterized in that: The historical communication data includes the number of communication interruptions and the total number of communication attempts in the past preset time period, the number of connection establishment failures and the total number of connection attempts, the cumulative duration of signal strength below a threshold and the total monitoring duration; The determining the communication stability between the first gateway device and the second gateway device according to the historical communication data of the first gateway device and the second gateway device includes: The historical communication data of the first gateway device and the second gateway device are respectively input into a pre-trained communication stability evaluation model to obtain a communication stability score of each gateway device, and the communication stability evaluation model satisfies the following expression: + + ） Among them, W is the communication stability score of the gateway device, and The number of communication interruptions and the total number of communication attempts of the corresponding gateway device in the past preset time period are respectively and They are the cumulative duration of the signal strength of the corresponding gateway device being lower than the threshold and the total monitoring duration. and They are the number of failed connection establishments of the corresponding gateway device and the total number of connection attempts, and P1, P2, and P3 are the weights of each indicator on the communication stability.

7. The railway power supply control method according to claim 5, characterized in that: The step of determining the first gateway device and the second gateway device with a higher communication stability as the target gateway device includes: Determine that the first gateway device and the second gateway device with a higher communication stability is preferentially selected as the target gateway device for communication for a first preset duration; After the first preset duration of communication is completed, determining a device with a lower communication stability as the target gateway device to communicate with a second preset duration, wherein the first preset duration is greater than the second preset duration; The first gateway device and the second gateway device with higher communication stability are used as the target gateway device for communication for the first preset duration, and the first gateway device and the second gateway device with lower communication stability are used as the target gateway device for communication for the second preset duration, and the target gateway device is switched alternately and cyclically.

8. The railway power supply control method according to claim 7, characterized in that: In the process of switching the target gateway device in an alternating cycle, the method further includes: Monitor the real-time communication status of the current target gateway device. If it is determined that the communication stability of the current target gateway device drops sharply or the communication is interrupted, immediately switch to another gateway device for communication.

9. The railway power supply control method according to claim 1, characterized in that: The analyzing the power supply transformer status data using the transformer status assessment model preset by the cloud server to obtain the analysis result includes: The power supply transformer state assessment model extracts and analyzes the input power supply transformer state data based on a deep learning algorithm, wherein the power supply transformer state data includes output current data, output voltage data, and temperature data of the power supply transformer; Based on the analysis results, it is determined that the temperature of the power supply transformer exceeds a preset threshold range, and the temperature change rate exceeds a preset value, and the power supply transformer temperature is determined to be abnormal; Based on the analysis results, it is determined that the current or voltage exceeds the preset threshold range and the fluctuation amplitude exceeds the preset value, and the current or voltage of the power supply transformer is abnormal.

10. A railway power supply system, characterized in that: It includes a power supply transformer, a detection sensor, a first gateway device, a second gateway device, a cooling device and a cloud server, wherein the power supply transformer is used to boost the mains voltage to obtain a high voltage for railway power supply, the detection sensor is used to monitor the status of the power supply transformer, the first gateway device and the second gateway device are used to send power supply transformer status data to the cloud server and receive power supply control instructions from the cloud server, the cloud server is used to receive and process the power supply transformer status data to obtain a power supply control instruction, and the cooling device is used to cool the power supply transformer according to the power supply control instruction; and A memory and a processor, wherein the memory is used to store program codes, and the processor is used to call the program codes to execute the method according to any one of claims 1 to 9.

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