Online anti-icing and ice-melting control system, method and platform for electrified railway overhead line system based on adjustable reactor

Abstract

The invention discloses an online anti-icing and ice-melting control system, method and platform for an electrified railway overhead line system based on an adjustable reactor. The system comprises an environment monitoring module, and a contact line temperature monitoring module, an adjustable reactor module and a control module which are electrically connected with the environment monitoring module; the contact line temperature monitoring module comprises a second sensor for monitoring the surface temperature of the contact line in real time; the adjustable reactor module is electrically connected in series into a backflow circuit between a traction substation and a contact network and is used for providing multi-gear adjustable inductive reactance values and adjusting current flowing through the contact network; the signal input end of the control module is in communication connection with the environment monitoring module and the contact line temperature monitoring module, and the control output end of the control module is electrically connected with the control end of the adjustable reactor module. On-line anti-icing and ice melting under the non-stop state are achieved, and railway transportation safety and efficiency are effectively guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of railway electrical safety protection, specifically relating to an online anti-icing and de-icing control system, method, and platform for electrified railway catenary based on adjustable reactors. Background Technology

[0002] With the rapid increase in the total mileage of electrified railways in my country, high-speed and heavy-haul railways are continuously extending into regions with complex climates, and some lines need to traverse micro-topographical areas characterized by high altitude, high humidity, and cold. In these areas, overhead contact line conductors are prone to icing due to the combined effects of temperature, humidity, and wind speed. Overhead contact line icing is a serious natural disaster that can lead to poor pantograph current collection, conductor galloping, breakage, and even tower collapse, seriously threatening train operation safety and even causing the railway system to shut down.

[0003] Currently, the main de-icing methods both domestically and internationally include: manual ice removal after a power outage of the overhead contact line, mechanical ice breaking using copper-based powder metallurgy pantographs, or operation using de-icing vehicles during maintenance windows when no trains are running. These traditional methods have significant drawbacks: low efficiency, time-consuming and labor-intensive; requiring power outages or shutdowns, affecting transportation efficiency; inability to cope with large-scale, sudden icing disasters; and safety hazards and equipment wear and tear. Most importantly, existing technology lacks online anti-icing and de-icing methods that can be continuously implemented during normal railway operations.

[0004] Therefore, in response to the above-mentioned technical problems and deficiencies, there is an urgent need to design and develop an online anti-icing and de-icing control system, method, and platform for electrified railway catenary based on adjustable reactors. Summary of the Invention

[0005] To overcome the shortcomings and difficulties of the existing technology, the purpose of this invention is to provide an online anti-icing and de-icing control system, method and platform for electrified railway catenary based on adjustable reactors, which aims to automatically and efficiently prevent and eliminate catenary icing without affecting the normal operation of electrified railways.

[0006] The first objective of this invention is to provide an online anti-icing and de-icing control system for electrified railway contact networks based on adjustable reactors; the second objective of this invention is to provide an online anti-icing and de-icing control method for electrified railway contact networks based on adjustable reactors; and the third objective of this invention is to provide an online anti-icing and de-icing control platform for electrified railway contact networks based on adjustable reactors.

[0007] The first objective of this invention is achieved as follows: the system includes an environmental monitoring module, and a contact wire temperature monitoring module, an adjustable reactor module, and a control module electrically connected to the environmental monitoring module;

[0008] The environmental monitoring module includes a first sensor for collecting ambient temperature, ambient humidity, and ambient wind speed; the contact wire temperature monitoring module includes a second sensor for real-time monitoring of the contact wire surface temperature; and the adjustable reactor module is electrically connected in series in the return circuit between the traction substation and the contact network to provide multiple adjustable inductive reactance values ​​and regulate the current flowing through the contact network.

[0009] The signal input terminal of the control module is communicatively connected to the environmental monitoring module and the contact wire temperature monitoring module, respectively, and its control output terminal is electrically connected to the control terminal of the adjustable reactor module.

[0010] Furthermore, the control module dynamically controls the switching of the adjustable reactor module based on the feedback data from the environmental monitoring module and the contact wire temperature monitoring module, and controls the surface temperature of the contact wire to be maintained within the preset anti-icing temperature range.

[0011] Furthermore, the control module includes a PLC controller and a switch execution circuit corresponding to each gear position of the adjustable reactor module.

[0012] Furthermore, the control module logic is configured to: pre-store the critical anti-icing current levels corresponding to different combinations of environmental parameters; and query and initially output the corresponding target level signal based on the real-time collected environmental parameters;

[0013] Based on the real-time data of the contact wire surface temperature, the target setting signal is corrected; wherein, if the contact wire surface temperature is lower than the lower limit of the anti-icing temperature range, the adjustable reactor module is controlled to switch to a lower inductive reactance setting to increase the current; if the contact wire surface temperature is higher than the upper limit of the anti-icing temperature range, the adjustable reactor module is controlled to switch to a higher inductive reactance setting to reduce the current.

[0014] Furthermore, the anti-icing temperature range is 0.5℃ to 1℃;

[0015] The adjustable reactor module includes at least three anti-icing settings and one de-icing setting. The three anti-icing settings are divided according to a combination of ambient temperature and wind speed, including: a basic anti-icing setting, suitable for operating conditions where the temperature is ≥-1.0℃ and the wind speed is ≤2.0m / s; an enhanced anti-icing setting, suitable for operating conditions where -3.0℃ ≤ temperature <-1.0℃ or 2.0m / s < wind speed ≤4.0m / s; and an extreme anti-icing setting, suitable for operating conditions where the temperature is <-3.0℃ or the wind speed is >4.0m / s.

[0016] The de-icing setting provides a higher current than all anti-icing settings and is used to perform de-icing operations when the contact wire is already covered with ice.

[0017] Furthermore, the control module is also configured to communicate with the railway traffic dispatching system to obtain real-time traffic load information; wherein, during peak periods when trains pass through, the adjustable reactor module is automatically controlled to switch to a higher inductive reactance level or disconnect.

[0018] The second objective of this invention is achieved as follows: the method is applied to the online anti-icing and de-icing control system for electrified railway contact networks based on adjustable reactors, the method comprising the following steps:

[0019] Generate and acquire first data corresponding to the surrounding environment; wherein, the first data includes environmental parameter data and contact wire surface temperature data;

[0020] Based on the first data, the pre-stored control strategy table is queried in real time to initially determine a target anti-icing level;

[0021] The surface temperature of the contact wire is compared with the preset anti-icing temperature range, and the target anti-icing level is corrected to generate corresponding second data; wherein, the second data is the final control command data;

[0022] Based on the second data, the adjustable reactor module is driven to switch to the corresponding gear, and the heating of the contact wire is controlled by adjusting the return current, so that its surface temperature is maintained within the anti-icing temperature range.

[0023] Furthermore, the step of querying a pre-stored control strategy table in real time based on the first data to initially determine a target anti-icing level also includes:

[0024] Through experiments or simulations, the minimum critical anti-icing current required to prevent contact wire icing under various typical environmental conditions was obtained.

[0025] Based on the critical anti-icing current and the contact network circuit impedance, the target inductive reactance value data required by the adjustable reactor module under various operating conditions is calculated and generated.

[0026] Multiple levels are set according to the target sense resistance data.

[0027] Furthermore, the step of driving the adjustable reactor module to switch to the corresponding gear according to the second data, and controlling the heating of the contact wire by adjusting the return current to maintain its surface temperature within the anti-icing temperature range, further includes:

[0028] When the contact wire temperature monitoring module detects that the surface temperature of the contact wire is continuously below 0°C and continues to drop, or when it receives a de-icing command issued manually, the control module controls the adjustable reactor module to switch to the de-icing mode, outputs de-icing current until the ice melts, and then switches back to the anti-icing mode corresponding to the current environmental parameters.

[0029] The third objective of this invention is achieved as follows: it includes a processor, a memory, and a control program for an online anti-icing and de-icing control platform for electrified railway contact networks based on adjustable reactors; wherein the processor executes the control program for the online anti-icing and de-icing control platform for electrified railway contact networks based on adjustable reactors, and the control program is stored in the memory; the control program for the online anti-icing and de-icing control platform for electrified railway contact networks based on adjustable reactors implements the online anti-icing and de-icing control method for electrified railway contact networks based on adjustable reactors.

[0030] This invention comprises an environmental monitoring module, a contact wire temperature monitoring module, an adjustable reactor module, and a control module electrically connected to the environmental monitoring module. The environmental monitoring module includes a first sensor for collecting ambient temperature, humidity, and wind speed. The contact wire temperature monitoring module includes a second sensor for real-time monitoring of the contact wire surface temperature. The adjustable reactor module is electrically connected in series in the return circuit between the traction substation and the contact network, providing multiple adjustable reactance values ​​and regulating the current flowing through the contact network. The control module's signal input terminal is communicatively connected to both the environmental monitoring module and the contact wire temperature monitoring module, and its control output terminal is electrically connected to the control terminal of the adjustable reactor module. The invention also includes a corresponding method and platform, enabling real-time monitoring of environmental conditions and contact wire status, automatic adjustment of circuit current, and online anti-icing and de-icing without interrupting operation, effectively ensuring railway transportation safety and efficiency.

[0031] In other words, this invention achieves online automatic anti-icing and de-icing of the electrified railway contact network without interrupting operation by using adjustable reactors with multiple levels of adjustment and dual feedback control of ambient temperature, humidity, wind speed and contact wire surface temperature. This effectively overcomes the inherent defects of traditional manual de-icing, such as low efficiency, poor safety and the need to interrupt train operation, and significantly improves the operational safety and transportation efficiency of the railway system under severe weather conditions. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the circuit principle of an online anti-icing and de-icing control system for electrified railway contact networks based on adjustable reactors according to the present invention.

[0034] Figure 2 This is a schematic diagram of the online anti-icing and de-icing control system architecture for electrified railway catenary based on adjustable reactors according to the present invention.

[0035] Figure 3 This is a schematic diagram of the process steps of an online anti-icing and de-icing control method for electrified railway contact networks based on adjustable reactors according to the present invention.

[0036] Figure 4 This is a schematic diagram of the architecture of an online anti-icing and de-icing control platform for electrified railway catenary based on adjustable reactors, according to the present invention. Detailed Implementation

[0037] To facilitate a clearer understanding of the objectives, technical solutions, and advantages of this invention, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art can easily understand other advantages and effects of this invention from the content disclosed in this specification.

[0038] This invention can also be implemented or applied through other different specific examples, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Secondly, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] Preferably, the online anti-icing and de-icing control method for electrified railway catenary based on adjustable reactors of the present invention is applied in one or more terminals or servers. The terminal is a device capable of automatically performing numerical calculations and / or information processing according to pre-set or stored instructions. Its hardware includes, but is not limited to, microprocessors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), embedded devices, etc.

[0042] The terminal can be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal can interact with the customer via a keyboard, mouse, remote control, touchpad, or voice control device.

[0043] This invention provides an online anti-icing and de-icing control system, method, and platform for electrified railway catenary based on adjustable reactors.

[0044] like Figure 3 The diagram shown is a flowchart of an online anti-icing and de-icing control method for electrified railway contact networks based on adjustable reactors, provided by an embodiment of the present invention.

[0045] In this embodiment, the online anti-icing and de-icing control method for electrified railway contact networks based on adjustable reactors can be applied to terminals or fixed terminals with display functions. The terminals are not limited to personal computers, smartphones, tablets, desktop computers or all-in-one computers with cameras, etc.

[0046] The online anti-icing and de-icing control method for electrified railway catenary based on adjustable reactors can also be applied to a hardware environment consisting of a terminal and a server connected to the terminal via a network. The network includes, but is not limited to, a wide area network (WAN), a metropolitan area network (MAN), or a local area network (LAN). The online anti-icing and de-icing control method for electrified railway catenary based on adjustable reactors in this embodiment can be executed by a server, by a terminal, or by both a server and a terminal.

[0047] For example, for electrified railway catenary online anti-icing and de-icing control terminals requiring adjustable reactors, the online anti-icing and de-icing control function based on adjustable reactors provided by the method of this invention can be directly integrated into the terminal, or a client application for implementing the method of this invention can be installed. Furthermore, the method provided by this invention can also run on servers or other devices in the form of a Software Development Kit (SDK), providing an interface for the online anti-icing and de-icing control function based on adjustable reactors for electrified railway catenary. Terminals or other devices can then implement the online anti-icing and de-icing control function based on adjustable reactors for electrified railway catenary through the provided interface. The invention will be further described below with reference to the accompanying drawings.

[0048] like Figures 1-2 As shown, the present invention provides an online anti-icing and de-icing control system for electrified railway contact networks based on adjustable reactors. The system includes an environmental monitoring module, as well as a contact wire temperature monitoring module, an adjustable reactor module, and a control module electrically connected to the environmental monitoring module.

[0049] The environmental monitoring module includes a first sensor for collecting ambient temperature, ambient humidity, and ambient wind speed; the contact wire temperature monitoring module includes a second sensor for real-time monitoring of the contact wire surface temperature; and the adjustable reactor module is electrically connected in series in the return circuit between the traction substation and the contact network to provide multiple adjustable inductive reactance values ​​and regulate the current flowing through the contact network.

[0050] The signal input terminal of the control module is communicatively connected to the environmental monitoring module and the contact wire temperature monitoring module, respectively, and its control output terminal is electrically connected to the control terminal of the adjustable reactor module.

[0051] The control module dynamically controls the switching of the adjustable reactor module based on the feedback data from the environmental monitoring module and the contact wire temperature monitoring module, and controls the surface temperature of the contact wire to be maintained within the preset anti-icing temperature range.

[0052] The control module includes a PLC controller and switching execution circuits corresponding to each gear position of the adjustable reactor module.

[0053] The control module logic is configured to: pre-store the critical anti-icing current levels corresponding to different combinations of environmental parameters; and query and initially output the corresponding target level signal based on the real-time collected environmental parameters.

[0054] Based on the real-time data of the contact wire surface temperature, the target setting signal is corrected; wherein, if the contact wire surface temperature is lower than the lower limit of the anti-icing temperature range, the adjustable reactor module is controlled to switch to a lower inductive reactance setting to increase the current; if the contact wire surface temperature is higher than the upper limit of the anti-icing temperature range, the adjustable reactor module is controlled to switch to a higher inductive reactance setting to reduce the current.

[0055] The anti-icing temperature range is 0.5℃ to 1℃;

[0056] The adjustable reactor module includes at least three anti-icing settings and one de-icing setting. The three anti-icing settings are divided according to a combination of ambient temperature and wind speed, including: a basic anti-icing setting, suitable for operating conditions where the temperature is ≥-1.0℃ and the wind speed is ≤2.0m / s; an enhanced anti-icing setting, suitable for operating conditions where -3.0℃ ≤ temperature <-1.0℃ or 2.0m / s < wind speed ≤4.0m / s; and an extreme anti-icing setting, suitable for operating conditions where the temperature is <-3.0℃ or the wind speed is >4.0m / s.

[0057] The de-icing setting provides a higher current than all anti-icing settings and is used to perform de-icing operations when the contact wire is already covered with ice.

[0058] The control module is also configured to communicate with the railway traffic dispatching system to obtain real-time traffic load information; wherein, during peak periods when trains pass through, the adjustable reactor module is automatically controlled to switch to a higher inductive reactance level or disconnect.

[0059] Specifically, in embodiments of the present invention, such as Figure 1 As shown, the design of the electrical control technology for de-icing and anti-icing of the overhead contact line in electrified railways includes an induction receiving module, a control module, adjustable reactors, and disconnect switches. The induction module consists of various sensor devices such as temperature sensors, humidity sensors, and wind speed sensors. The induction module is installed near the high-speed railway track requiring de-icing and anti-icing measures to receive more realistic, reliable, and accurate environmental data. The control module is located in the control room of the traction substation and consists of various PLC devices. The control module receives and processes the data transmitted from the induction module, and simultaneously responds quickly to output signals, controlling switches and adjustable reactor settings.

[0060] The specific design and implementation steps are as follows. Based on literature review and simulation experiments, the minimum anti-icing current I required to prevent large-area, high-hardness icing on the contact wire surface has been determined under typical conditions such as ambient temperature 0℃, wind speed 0m / s, humidity 100%; ambient temperature -5℃, wind speed 5m / s, humidity 100%; and ambient temperature -5℃, wind speed 10m / s, humidity 100%. Based on these experimental results and the formula in the literature, a curve showing the minimum anti-icing current changing with ambient temperature and wind speed is fitted and determined. Based on the characteristic curve of the minimum anti-icing current, three anti-icing current levels are set with the primary goal of preventing conductor icing. The design control strategy is as follows: The first level is basic anti-icing, under the conditions of temperature ≥ -1.0℃ and wind speed ≤ 2.0 m / s, with a current of 100A; the second level is enhanced anti-icing, under the conditions of -3.0℃ ≤ temperature < -1.0℃ or 2.0 m / s < wind speed ≤ 4.0 m / s, with a current of 180A; the third level is extreme condition, under the conditions of temperature < -3.0℃ or wind speed > 4.0 m / s, with a current of 220A. Additionally, an ice-melting mode can be designed, allowing the ice on the contact wire to melt slowly when the current in the contact wire reaches 250A.

[0061] Under the above conditions, firstly, calculate the impedance value Z of the railway contact network circuit according to the actual length of the railway section requiring anti-icing and de-icing. Given the output voltage U of the traction substation, the calculation formula can be derived. Substitute the minimum de-icing current I0 under ambient temperature of 0℃ and wind speed of 0m / s into the above formula to obtain the value of the adjustable reactor L, denoted as L1. At this point, L1 is the maximum value of the adjustable reactor. Then, based on the previously set de-icing current settings, different inductance values ​​Ln can be obtained. Finally, calculate the reactance values ​​for each setting. This completes the design and production of the adjustable reactor.

[0062] according to Figure 1 The diagram shows an adjustable reactor connected to the high-speed railway electrical system, with a disconnecting switch installed for easy system switching by relevant personnel. Simultaneously, as shown, various sensors for environmental factor detection, such as temperature sensors, wind speed sensors, and humidity sensors, are placed near high-speed railway sections prone to icing and in open areas to facilitate accurate measurement of environmental conditions. Temperature sensors are installed on the railway contact wire to measure its temperature in real time, reflecting icing levels on the contact wire surface.

[0063] In other words, the purpose of this invention is to overcome the shortcomings of current railway electrical systems in terms of low efficiency, high labor costs, and the requirement for most effective solutions to be implemented during shutdown for de-icing. This invention discloses an electrical control technology for de-icing and anti-icing of electrified railway contact networks. On one hand, by using adjustable reactors to achieve multi-level adjustable railway power system de-icing, this invention effectively solves the problems of low efficiency and the need for labor-intensive de-icing during shutdown. On the other hand, by installing ambient temperature, humidity, and wind speed sensors near the line, and temperature sensors on the conductors, the design of the control system uses sensor data to rationally control the opening and closing of switches, achieving automatic and rapid activation and adjustment of the de-icing system. This also reasonably reduces the operating time of the de-icing system, lowers losses, and protects the devices, demonstrating excellent engineering application prospects.

[0064] To achieve the above objectives, the technical solution adopted by this invention is as follows: The electrified railway contact wire de-icing and anti-icing electrical control system mainly includes an environmental factor monitoring module composed of sensors such as temperature sensors, humidity sensors, and wind speed sensors; a contact wire surface temperature detection module; a PLC-based automatic control system; and a multi-level adjustable reactor. After connecting the above control system and the adjustable reactor to the railway electrical system, based on information such as ambient temperature, wind speed, and humidity from the meteorological bureau, manual judgment is made. When the climatic factors are about to reach the contact wire icing requirements, but the contact wire has not yet iced, the switch is manually closed to put the above system into use.

[0065] The basic principle of the contact de-icing and anti-icing electronic control technology for electrified railways is to achieve the purpose of de-icing and ice melting by passing a certain amount of current through the contact wire to heat it up. This electronic control technology combines two important parameters: environmental factors and conductor surface temperature. The control system automatically monitors and controls the surface temperature of the contact wire to always keep it within the range of 0.5-1℃, so that the hard conditions required for icing cannot be reached, thus ensuring that the surface of the contact wire cannot be covered with ice.

[0066] Based on the required impedance value of the contact network in the railway section to prevent icing, and the minimum current required to prevent conductor icing under several typical environmental conditions (such as temperature 0℃, wind speed 0m / s, humidity 100%, temperature -5℃, wind speed 5m / s, humidity 100%), this is denoted as the minimum anti-icing current under that environmental condition. The required inductive reactance value for each setting is calculated based on the minimum anti-icing current under each environmental condition. The specifications and settings of the adjustable electrical equipment are determined and designed based on the calculation results, resulting in a multi-stage adjustable reactor. After the electrical control system is put into practical use, it automatically adjusts to the adjustable reactor setting corresponding to various environmental conditions based on data returned from ambient temperature, humidity, and wind speed sensors. Simultaneously, it controls the contact wire temperature detected by temperature sensors on the railway contact wire. If the contact wire surface temperature is too low, the control system promptly adjusts the reactance value by adjusting the adjustable reactor setting to increase the current flowing through the contact wire, thereby increasing the contact wire heating and maintaining the contact wire surface temperature at 0.5-1℃ to achieve online control and online de-icing. At the same time, a de-icing setting is set according to calculations. If the surface of the contact wire is already covered with ice, adjusting to this setting will greatly increase the current flowing through the contact wire, thereby melting the ice on the contact wire.

[0067] Furthermore, data transmitted from environmental factor measurement sensors and contact wire surface temperature sensors are recorded and stored, and the data is processed and analyzed to establish a database. During use, this database is continuously improved based on the transmitted data, and ultimately, the established database guides the adjustment of the adjustable reactor settings, making the system control more precise and detailed.

[0068] Furthermore, considering the safe and stable operation of the railway system and the reduction of costs and losses associated with ice prevention and de-icing, during peak train traffic periods (when multiple trains pass through in a short period) on railway sections requiring ice prevention and de-icing, the current flowing through the electrical railway contact network increases, as does the contact wire current. This current is sufficient to provide temporary insulation and ice prevention, and the pantograph's movement across the contact wire as a train passes also helps with contact de-icing. Under these circumstances, to prevent excessive load on the railway electrical system from affecting its operational stability, the adjustable reactor can be proactively downgraded, or even disconnected entirely, or connected to a signal from the previous railway section, transmitting this signal to the control system. This allows for automatic control of the adjustable reactor's position and switching status based on load conditions.

[0069] Furthermore, if the contact wire is already covered with ice before anti-icing due to untimely system activation or extreme conditions such as sudden weather changes, the adjustable reactor can be automatically adjusted to increase the current on the contact wire, thereby increasing the heat generated on the contact wire to slowly melt the ice on the contact wire. After the de-icing stage is over, the anti-icing setting will be adjusted back to the setting corresponding to the weather conditions.

[0070] The advantage of this electrical control technology lies in providing a novel online de-icing and anti-icing solution for the overhead contact system of electric railways. This solution automatically adjusts the adjustable reactor settings based on environmental factors and the surface temperature of the contact wire, thereby regulating the current and heat in the contact wire and ultimately achieving online automatic de-icing and anti-icing. It addresses the significant pain points of current solutions, such as high labor costs, inherent risks, low efficiency, and the inability to be performed during railway operation, which can potentially disrupt normal railway operations. Therefore, this solution has excellent application prospects and development potential.

[0071] In other words, the present invention provides an electrical control technology for de-icing and anti-icing of the overhead contact line in electrified railways. The electrical control system for de-icing and anti-icing of the overhead contact line mainly includes an environmental factor monitoring module composed of sensors such as temperature sensors, humidity sensors, and wind speed sensors; a contact line surface temperature detection module; a PLC-based automatic control system; and a multi-level adjustable reactor. After connecting the above control system and the adjustable reactor to the railway electrical system, based on information such as ambient temperature, wind speed, and humidity from the meteorological bureau, manual judgment is made. When the climatic factors are about to reach the requirements for contact line icing, but the contact line has not yet iced, the switch is manually closed to put the above system into operation.

[0072] The basic principle of the contact de-icing and anti-icing electronic control technology for electrified railways is to achieve the purpose of de-icing and ice melting by passing a certain amount of current through the contact wire to heat it up. This electronic control technology combines two important parameters: environmental factors and conductor surface temperature. The control system automatically monitors and controls the surface temperature of the contact wire to always keep it within the range of 0.5-1℃, so that the hard conditions required for icing cannot be reached, thus ensuring that the surface of the contact wire cannot be covered with ice.

[0073] Based on the required impedance value of the contact network in the railway section to prevent icing, and the minimum current required to prevent conductor icing under various environmental conditions, the critical anti-icing current under those conditions is denoted as the critical anti-icing current. A characteristic curve of the critical anti-icing current varying with ambient temperature and wind speed is fitted. A three-level control strategy with anti-icing as the primary objective is designed based on the curve changes. The required inductive reactance value for each level is calculated based on the critical anti-icing current value of the set level. The specifications and levels of the adjustable electrical components are determined and designed based on the calculation results, resulting in multi-level adjustable reactors. After the electrical control system is put into practical use, it automatically adjusts to the adjustable reactor level corresponding to various environmental conditions based on data from ambient temperature, humidity, and wind speed sensors. Simultaneously, it combines the control with the contact wire temperature detected by temperature sensors on the railway contact wire. If the contact wire surface temperature is too low, the control system promptly adjusts the adjustable reactor level to increase the reactance value, thereby increasing the current flowing through the contact wire and increasing the contact wire heating, thus maintaining the contact wire surface temperature at 0.5-1℃ to achieve online control and online de-icing. At the same time, a de-icing setting is set according to calculations. If the surface of the contact wire is already covered with ice, adjusting to this setting will greatly increase the current flowing through the contact wire, thereby melting the ice on the contact wire.

[0074] The adjustable reactor settings are controlled based on two key parameters: ambient temperature, wind speed, and humidity measured by reference sensors, and the contact wire surface temperature measured by sensors. The control strategy is divided into three levels: basic anti-icing, enhanced anti-icing, and extreme condition anti-icing. The setting is adjusted according to whether the contact wire surface is covered with ice to achieve either de-icing or anti-icing purposes. This has virtually no impact on normal railway operation and allows de-icing to occur while the railway is running. A multi-level adjustable reactor is used, with the setting determined according to actual needs.

[0075] To achieve the above objectives, the present invention also provides an online anti-icing and de-icing control method for electrified railway contact networks based on adjustable reactors, such as... Figure 3 As shown, the method is applied to the online anti-icing and de-icing control system for electrified railway catenary based on adjustable reactors. The method includes the following steps:

[0076] S1. Generate and acquire first data corresponding to the surrounding environment; wherein, the first data includes environmental parameter data and contact wire surface temperature data;

[0077] S2. Based on the first data, query the pre-stored control strategy table in real time to initially determine a target anti-icing level;

[0078] S3. Compare the surface temperature of the contact wire with the preset anti-icing temperature range, correct the target anti-icing level, and generate corresponding second data; wherein, the second data is the final control command data;

[0079] S4. Based on the second data, drive the adjustable reactor module to switch to the corresponding gear, and control the heating of the contact wire by adjusting the return current, so that its surface temperature is maintained within the anti-icing temperature range.

[0080] The step of querying a pre-stored control strategy table in real time based on the first data to initially determine a target anti-icing level also includes:

[0081] S21. Obtain the minimum critical anti-icing current required to prevent contact wire icing under various typical environmental conditions through experiments or simulations.

[0082] S22. Based on the critical anti-icing current and the contact network circuit impedance, calculate and generate the target inductive reactance value data required by the adjustable reactor module under various operating conditions.

[0083] S23. Set multiple corresponding gears based on the target resistance data.

[0084] The step of driving the adjustable reactor module to switch to the corresponding gear according to the second data, and controlling the heating of the contact wire by adjusting the return current to maintain its surface temperature within the anti-icing temperature range, further includes:

[0085] S41. When the contact wire temperature monitoring module detects that the surface temperature of the contact wire is continuously below 0°C and continues to drop, or when it receives a de-icing command issued manually, the control module controls the adjustable reactor module to switch to the de-icing setting, outputs the de-icing current until the ice melts, and then switches back to the anti-icing setting corresponding to the current environmental parameters.

[0086] S51, the method further includes a data recording and optimization step: continuously recording environmental parameters, contact line temperature and the gear used, and forming a historical database; analyzing the historical database based on machine learning algorithms to optimize the parameter settings in the control strategy table.

[0087] In the system solution embodiment of the present invention, the specific details of the method steps involved in the online anti-icing and de-icing control of the electrified railway contact network based on the adjustable reactor have been described above and will not be repeated here.

[0088] To achieve the above objectives, the present invention also provides an online anti-icing and de-icing control platform for electrified railway contact networks based on adjustable reactors, such as... Figure 4As shown, the system includes a processor, a memory, and a control program for an online anti-icing and de-icing control platform for electrified railway catenary based on adjustable reactors. The processor executes the control program, which is stored in the memory. This control program implements the steps of the online anti-icing and de-icing control method for electrified railway catenary based on adjustable reactors. For example:

[0089] S1. Generate and acquire first data corresponding to the surrounding environment; wherein, the first data includes environmental parameter data and contact wire surface temperature data;

[0090] S2. Based on the first data, query the pre-stored control strategy table in real time to initially determine a target anti-icing level;

[0091] S3. Compare the surface temperature of the contact wire with the preset anti-icing temperature range, correct the target anti-icing level, and generate corresponding second data; wherein, the second data is the final control command data;

[0092] S4. Based on the second data, drive the adjustable reactor module to switch to the corresponding gear, and control the heating of the contact wire by adjusting the return current, so that its surface temperature is maintained within the anti-icing temperature range.

[0093] The specific details of the steps have been explained above and will not be repeated here.

[0094] In this embodiment of the invention, the built-in processor of the electrified railway catenary online anti-icing and de-icing control platform based on adjustable reactors can be composed of integrated circuits. For example, it can be composed of a single packaged integrated circuit, or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor connects to various components using various interfaces and lines, and executes programs or units stored in memory, as well as calling data stored in memory, to perform various functions of online anti-icing and de-icing control of the electrified railway catenary based on adjustable reactors and process data.

[0095] The memory is used to store program code and various data. It is installed in the online anti-icing and de-icing control platform of the electrified railway catenary based on adjustable reactors, and can complete the storage and retrieval of programs or data at high speed and automatically during operation.

[0096] The memory includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0097] This invention comprises an environmental monitoring module, a contact wire temperature monitoring module, an adjustable reactor module, and a control module electrically connected to the environmental monitoring module. The environmental monitoring module includes a first sensor for collecting ambient temperature, humidity, and wind speed. The contact wire temperature monitoring module includes a second sensor for real-time monitoring of the contact wire surface temperature. The adjustable reactor module is electrically connected in series in the return circuit between the traction substation and the contact network, providing multiple adjustable reactance values ​​and regulating the current flowing through the contact network. The control module's signal input terminal is communicatively connected to both the environmental monitoring module and the contact wire temperature monitoring module, and its control output terminal is electrically connected to the control terminal of the adjustable reactor module. The invention also includes a corresponding method and platform, enabling real-time monitoring of environmental conditions and contact wire status, automatic adjustment of circuit current, and online anti-icing and de-icing without interrupting operation, effectively ensuring railway transportation safety and efficiency.

[0098] In other words, this invention achieves online automatic anti-icing and de-icing of the electrified railway contact network without interrupting operation by using adjustable reactors with multiple levels of adjustment and dual feedback control of ambient temperature, humidity, wind speed and contact wire surface temperature. This effectively overcomes the inherent defects of traditional manual de-icing, such as low efficiency, poor safety and the need to interrupt train operation, and significantly improves the operational safety and transportation efficiency of the railway system under severe weather conditions.

[0099] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A system for on-line anti-icing and de-icing control of an electrified railway catenary based on a tunable reactor, characterized in that, The system comprises an environment monitoring module, a contact line temperature monitoring module, an adjustable reactor module and a control module electrically connected with the environment monitoring module; The environment monitoring module comprises a first sensor for collecting environment temperature, environment humidity and environment wind speed; the contact line temperature monitoring module comprises a second sensor for monitoring the surface temperature of the contact line in real time; the adjustable reactor module is electrically connected in series between the traction substation and the catenary to provide a multi-grade adjustable inductive reactance value and adjust the current flowing through the catenary; The control module is communicatively connected with the environment monitoring module and the contact line temperature monitoring module, and its control output is electrically connected with the control end of the adjustable reactor module.

2. The online anti-icing and de-icing control system for electrified railway catenary based on adjustable reactor according to claim 1, characterized in that, The control module dynamically controls the gear shifting of the adjustable reactor module according to the feedback data of the environment monitoring module and the contact line temperature monitoring module, and controls the surface temperature of the contact line to be maintained within a preset anti-icing temperature range.

3. A power electronic based on-line anti-icing and de-icing control system for electrified railway catenary based on adjustable reactors according to claim 1 or 2, characterized in that, The control module comprises a PLC controller and a switch execution circuit corresponding to each gear of the adjustable reactor module.

4. The online anti-icing and de-icing control system for electrified railway catenary based on adjustable reactor according to claim 3, characterized in that, The control module is logically configured to pre-store critical anti-icing current gears corresponding to different environment parameter combinations; According to the real-time collected environment parameters, the corresponding target gear signal is queried and initially output; According to the real-time data of the contact line surface temperature, the target gear signal is corrected; if the contact line surface temperature is lower than the lower limit of the anti-icing temperature range, the adjustable reactor module is controlled to switch to a gear with lower inductive reactance to increase the current; if the contact line surface temperature is higher than the upper limit of the anti-icing temperature range, the adjustable reactor module is controlled to switch to a gear with higher inductive reactance to reduce the current.

5. The on-line anti-icing and de-icing control system for electrified railway catenary based on adjustable reactor according to claim 3, characterized in that, The anti-icing temperature range is 0.5-1℃; The adjustable reactor module comprises at least three anti-icing gears and one ice melting gear; the three anti-icing gears are divided according to the combination of environment temperature and wind speed, including a basic anti-icing gear suitable for a condition where the temperature is greater than or equal to -1.0℃ and the wind speed is less than or equal to 2.0m / s, a reinforced anti-icing gear suitable for a condition where -3.0℃≤temperature<-1.0℃ or 2.0m / s<wind speed≤4.0m / s, and an extreme anti-icing gear suitable for a condition where the temperature is less than -3.0℃ or the wind speed is greater than 4.0m / s; The ice melting gear provides a current greater than all the anti-icing gears, and is used for ice melting operation when the contact line is covered with ice.

6. A catenary on-line de-icing control system for electrified railways based on adjustable reactors according to claim 1 or 2, characterized in that, The control module is also communicatively connected with a railway train dispatching system to obtain real-time train load information; during the peak period when the train passes, the adjustable reactor module is automatically controlled to switch to a gear with higher inductive reactance or be disconnected.

7. A method for on-line anti-icing and de-icing control of an electrified railway catenary based on a tunable reactor, characterized in that, The method is applied to the adjustable reactor-based electrified railway catenary online anti-icing and ice melting control system as claimed in any one of claims 1-6, and the method comprises the following steps: First data corresponding to the surrounding environment is generated and obtained; the first data comprises environment parameter data and contact line surface temperature data; According to the first data, a target anti-icing gear is initially determined by querying a pre-stored control strategy table in real time; The surface temperature of the contact line is compared with a preset anti-icing temperature interval, and the target anti-icing gear is corrected and corresponding second data is generated; wherein the second data is the final control instruction data; According to the second data, the adjustable reactor module is switched to the corresponding gear, and the surface temperature of the contact line is maintained in the anti-icing temperature interval by adjusting the backflow current.

8. The online anti-icing and de-icing control method of electrified railway catenary based on adjustable reactor according to claim 7, characterized in that, The first data is used to query a pre-stored control strategy table in real time to preliminarily determine a target anti-icing gear, and the method further comprises: Through experiments or simulations, the minimum critical anti-icing current required to prevent icing of the contact line under various typical environmental conditions is obtained; According to the critical anti-icing current and the catenary loop impedance, target inductive reactance value data required by the adjustable reactor module under various conditions is calculated and generated; According to the target inductive reactance value data, a plurality of corresponding gears are set.

9. A method of online anti-icing and de-icing control of an electrified railway catenary based on a tunable reactor according to claim 7 or 8, characterized in that, According to the second data, the adjustable reactor module is switched to the corresponding gear, and the surface temperature of the contact line is maintained in the anti-icing temperature interval by adjusting the backflow current, and the method further comprises: When the contact line temperature monitoring module detects that the surface temperature of the contact line is continuously below 0℃ and continuously decreases, or receives a manual ice-melting instruction, the control module controls the adjustable reactor module to switch to an ice-melting gear and outputs an ice-melting current until the ice is melted, and then switches back to the anti-icing gear corresponding to the current environmental parameters.

10. An online anti-icing and de-icing control platform for electrified railway catenary based on adjustable reactors, characterized in that, The processor, the memory, and the electrified railway catenary online anti-icing and ice-melting control platform control program based on an adjustable reactor are included; wherein the processor executes the electrified railway catenary online anti-icing and ice-melting control platform control program based on an adjustable reactor, the electrified railway catenary online anti-icing and ice-melting control platform control program based on an adjustable reactor is stored in the memory, and the electrified railway catenary online anti-icing and ice-melting control platform control program based on an adjustable reactor realizes the electrified railway catenary online anti-icing and ice-melting control system based on an adjustable reactor as claimed in any one of claims 1-6.

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