A traction power supply system for an electrified highway

Abstract

The utility model discloses an electrified highway's traction power supply system relates to electrified highway power supply field, solves fixed section type and cannot adapt to electrified highway high frequency large fluctuation, different power supply demand. Through the electrical interface of rectifier change of box type traction substation mother station reservation, realizes the plug -in access of box type traction substation daughter station, can only construct box type traction substation mother station before electrified highway power supply construction early stage, realizes basic power supply demand, when the highway transportation demand growth or section climbing in later period, then adaptability can connect box type traction substation daughter station and box type traction substation mother station, realizes the expansion, need not reserve excessively high margin in early construction, and the structure of daughter station is simpler than mother station, and the cost is lower, avoids the resource waste caused by the expansion, and the total central control platform can also match the electrified highway high frequency large fluctuation load in real time through remote power dispatching control after the expansion, avoids the capacity resource waste of low demand period.

Description

Technical Field

[0001] This utility model relates to the field of power supply for electrified highways, and in particular to a traction power supply system for electrified highways. Background Technology

[0002] Electrified highways are a new type of transportation that uses overhead contact lines to supply electricity to vehicles. Vehicles obtain power by connecting to the contact lines via pantographs.

[0003] Electrified highways generally use a 1500V DC traction power supply system because this system is widely used in urban rail transit such as subways and is technically mature and reliable. However, the traction substation layout still adopts the "fixed section" scheme commonly used in rail transit, with a traction substation set up at regular intervals, and the capacity designed at the maximum long-term load.

[0004] However, rail transit trains operate on fixed schedules, and their power curves are predictable. Electrified highways, on the other hand, differ from conventional rail transit power supply systems. Significant variations in vehicle density, speed, and road conditions across different sections lead to high and fluctuating power demands in non-fixed sections. Therefore, electrified highway power supply cannot be planned with relatively fixed power outputs, making it difficult to adapt to dynamic demands. As highway transport demand increases, the capacity of existing traction power substations becomes insufficient, limiting vehicle operation and highway traffic efficiency.

[0005] Therefore, providing a power supply solution that meets the high-frequency, large-amplitude, and differentiated power supply needs of electrified highways is a technical problem that urgently needs to be solved by those in this field. Utility Model Content

[0006] The purpose of this invention is to provide a traction power supply system for electrified highways, which solves the problem that fixed-section systems cannot adapt to the high-frequency, large-amplitude fluctuations and differentiated power supply needs of electrified highways.

[0007] To solve the above-mentioned technical problems, this utility model provides a traction power supply system for electrified highways, including: a central control platform, multiple box-type traction substations (mother stations), and multiple box-type traction substations (daughter stations);

[0008] The box-type traction substation includes: a first rectifier transformer, a first silicon rectifier cabinet, and a first DC incoming switch cabinet; the output terminal of the first rectifier transformer is connected to the input terminal of the first silicon rectifier cabinet, and the output terminal of the first silicon rectifier cabinet is connected to the input terminal of the first DC incoming switch cabinet.

[0009] The box-type traction substation bus station is connected to the contact network and is located at the corresponding line section of the contact network on the electrified highway. The box-type traction substation bus station includes multiple rectifier transformer outgoing cabinets, of which at least one rectifier transformer outgoing cabinet has a reserved electrical interface.

[0010] The electrical interface can be plugged into the input terminal of the first rectifier transformer via a cable, and the output terminal of the first DC input switch cabinet is connected to a common busbar.

[0011] The central control platform has a bidirectional communication connection with each of the prefabricated traction substation mother stations and prefabricated traction substation daughter stations. The central control platform controls the switching on or off of the prefabricated traction substation mother stations and prefabricated traction substation daughter stations.

[0012] As an optional solution, in the traction power supply system of the above-mentioned electrified highway, the box-type traction substation bus station also includes an insulation detection device;

[0013] The insulation detection device is installed between the positive busbar and the negative busbar of the common busbar;

[0014] The insulation detection device is connected to the station controller of the box-type traction substation bus station, and sends short circuit detection information, open circuit detection information, real-time insulation detection information of DC system, insulation detection information of DC feeder cable and contact network, and voltage deviation information between DC positive and negative poles to the station controller, so that the station controller triggers protection action;

[0015] The insulation detection device is communicatively connected to the central control platform and uploads short-circuit detection information, open-circuit detection information, real-time insulation detection information of the DC system, insulation detection information of the DC feeder cable and the contact network, and voltage deviation information between the positive and negative poles of the DC system to the central control platform.

[0016] As an alternative, in the traction power supply system of the above-mentioned electrified highway, the top of the box-type traction substation bus station is provided with slide rails on both sides, and the ends of the slide rails are provided with limit blocks and positioning sensors;

[0017] The bottom of the box-type traction substation is provided with a slot corresponding to the slide rail, and a locking tongue is embedded in the slot; when the box-type traction substation is pushed along the slide rail to the limit block, the positioning sensor is triggered, and the locking tongue automatically pops out and engages with the slide rail.

[0018] The positioning sensor is connected to the station controller and sends fixed status information.

[0019] As an alternative, in the traction power supply system of the above-mentioned electrified highway, a rectifier temperature controller is installed in the first rectifier transformer, a data monitoring and acquisition device is installed in the first silicon rectifier cabinet, and a measurement and control instrument is installed in the first DC incoming switch cabinet.

[0020] The rectifier temperature controller, the data monitoring and acquisition device, and the measurement and control instrument are connected to the communication management unit of the box-type traction substation bus station through the RS485 interface reserved in the first DC incoming switch cabinet.

[0021] As an optional solution, the box-type traction substation in the traction power supply system of the above-mentioned electrified highway also includes: a video monitoring system;

[0022] The video surveillance system includes cameras, an Ethernet communication module, and a video storage unit;

[0023] The camera is connected to the central control platform and the mother station of the box-type traction substation via an Ethernet communication module, and the camera is also connected to the video storage unit.

[0024] As an optional solution, in the traction power supply system of the above-mentioned electrified highway, the box-type traction substation bus station also includes a grid-connected isolating switch cabinet;

[0025] The power grid isolation switch cabinet includes: a positive isolation knife switch and a negative isolation knife switch;

[0026] One end of the positive isolation switch and the negative isolation switch are connected to the DC feeder cabinet, and the other end of the positive isolation switch and the negative isolation switch are connected to the contact network.

[0027] As an optional solution, in the traction power supply system of the above-mentioned electrified highway, the box-type traction substation also includes: an industrial air conditioner, an infrared thermal imaging monitoring module, and an electric proportional regulating air valve;

[0028] The industrial air conditioner is installed inside the top of the box-type traction substation substation;

[0029] Multiple infrared thermal imaging monitoring modules are respectively installed inside the top of the first rectifier transformer and the first silicon rectifier cabinet.

[0030] The input end of the electric proportional regulating air valve is connected to the main air supply pipe of the industrial air conditioner, and the multiple output ends of the electric proportional regulating air valve are connected to the air supply port on the top of the first rectifier transformer and the first silicon rectifier cabinet through multiple branch air pipes.

[0031] The infrared thermal imaging monitoring module is communicatively connected to the industrial air conditioner and the electric proportional regulating valve.

[0032] As an alternative, in the traction power supply system of the above-mentioned electrified highway, an electromagnetic lock body is pre-embedded at each of the four corners of the bottom plate of the box-type traction substation, with the iron core of the electromagnetic lock body facing downwards.

[0033] Each of the box-type traction substation bus station boxes has four composite suction cups fixed to its top plate, which are coaxial with each of the electromagnetic lock bodies.

[0034] The suction cup coil and the electromagnetic lock body coil are energized and attracted together.

[0035] As an optional solution, in the traction power supply system of the aforementioned electrified highway, the box-type traction substation also includes: a fire control system;

[0036] The fire control system includes: smoke sensor, aerosol fire extinguishing bottle, rotary nozzle, bottle mouth solenoid valve, and fire control panel;

[0037] The smoke sensor is installed on the top of the enclosure and is connected to the fire control panel.

[0038] The solenoid valve at the bottle opening is installed at the bottle opening of the aerosol fire extinguishing bottle. The solenoid valve at the bottle opening is connected to one end of the branch pipe, and the other end of the branch pipe is connected to the rotating nozzle. The fire control panel is connected to the solenoid valve at the bottle opening.

[0039] As an optional solution, in the traction power supply system of the above-mentioned electrified highway, the box-type traction substation also includes: multiple compartment fireproof partitions;

[0040] The fireproof partition between the compartments is installed between the adjacent compartment walls of the first rectifier transformer, the first silicon rectifier cabinet, and the first DC incoming switch cabinet, and the fireproof partition between the compartments is welded to the frame of the enclosure.

[0041] The traction power supply system for electrified highways provided by this utility model enables pluggable connection of substations by reserving electrical interfaces for rectifier transformer outgoing cabinets in the prefabricated traction substation mother station. In the early stages of electrified highway power supply construction, only the prefabricated traction substation mother station needs to be built to meet basic power supply requirements. As highway transportation demand increases or road sections climb slopes, the substations can be adaptively connected to the prefabricated traction substation mother station to achieve capacity expansion. This eliminates the need for excessive margin in the early construction phase, and the substation structure is simpler and less expensive than the mother station, avoiding resource waste caused by capacity expansion. The central control platform reads the operating data of the mother station and substations in real time through two-way communication. After capacity expansion, the status can also be controlled remotely through power dispatch. The power capacity can be adjusted according to traffic flow, matching the high-frequency and large-amplitude load fluctuations of the electrified highway in real time, avoiding waste of capacity resources during low-demand periods. Attached Figure Description

[0042] To more clearly illustrate the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram of a traction power supply system for an electrified highway provided in an embodiment of this application;

[0044] Figure 2 A schematic diagram of a prefabricated traction substation bus station provided in an embodiment of this application;

[0045] Figure 3 A circuit diagram of a box-type traction substation bus station provided for an embodiment of this application;

[0046] Figure 4 A schematic diagram of a box-type traction substation substation provided for an embodiment of this application;

[0047] Figure 5 A schematic diagram illustrating the expansion of a box-type traction substation substation provided in an embodiment of this application;

[0048] Figure 6(a) is a schematic diagram of a combination of a mother station and a daughter station provided in an embodiment of this application;

[0049] Figure 6(b) is a schematic diagram of another combination of mother station and daughter station provided in an embodiment of this application;

[0050] Figure 6(c) is a schematic diagram of another combination of mother station and sub-station provided in the embodiment of this application.

[0051] The accompanying figure is labeled as follows:

[0052] Box-type traction substation mother station 10, box-type traction substation daughter station 11. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0054] The core of this utility model is to provide a traction power supply system for electrified highways.

[0055] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] To address the aforementioned problems, embodiments of this application provide a traction power supply system for electrified highways. Figure 1 A schematic diagram of a traction power supply system for an electrified highway provided in this application embodiment is shown below. Figure 1 As shown, it includes: a central control platform, multiple prefabricated traction substation mother stations 10, and multiple prefabricated traction substation daughter stations 11;

[0057] The box-type traction substation substation 11 includes: a first rectifier transformer, a first silicon rectifier cabinet, and a first DC incoming line switch cabinet; the output terminal of the first rectifier transformer is connected to the input terminal of the first silicon rectifier cabinet, and the output terminal of the first silicon rectifier cabinet is connected to the input terminal of the first DC incoming line switch cabinet.

[0058] The box-type traction substation mother station 10 is connected to the contact network and is set at the corresponding line section of the contact network on the electrified highway. The box-type traction substation mother station 10 includes multiple rectifier transformer outgoing cabinets, of which at least one rectifier transformer outgoing cabinet has a reserved electrical interface.

[0059] The electrical interface can be plugged into the input terminal of the first rectifier transformer via a cable, and the output terminal of the first DC incoming switch cabinet is connected to the common busbar.

[0060] The central control platform has a two-way communication connection with each prefabricated traction substation mother station 10 and prefabricated traction substation daughter station 11. The central control platform controls the switching on or off of the prefabricated traction substation mother station 10 and prefabricated traction substation daughter station 11.

[0061] like Figure 1 As shown, in the electrified highway power supply scheme provided in this application, the box-type traction substation mother station 10 (hereinafter referred to as the mother station) is set at the corresponding line section of the contact network on the electrified highway, and the box-type traction substation daughter station 11 (hereinafter referred to as the daughter station) is set up according to the expansion needs.

[0062] The prefabricated traction substation bus station 10, which was built in one phase, has a rectifier transformer capacity of 1600kVA, configured with 12 pulses. The 10kV power supply is drawn from the internal switching station, and the substation is powered by a single independent power source. It can directly supply power to the 1500V contact network, and the rated capacity is designed according to the near-term load. Electrical interfaces for the rectifier transformer outgoing line cabinet are reserved. Figure 2 This is a schematic diagram of a prefabricated traction substation bus station 10 provided in an embodiment of this application. Figure 3 A circuit diagram of a box-type traction substation bus station 10 provided in this application embodiment is shown below. Figure 2 ,3 As shown, the prefabricated traction substation bus station 10 includes: station service transformer cabinet AH01, high-voltage incoming line AH02, high-voltage metering AH03, return line + PT AH04, No. 1 rectifier transformer outgoing line cabinet AH06, No. 2 rectifier transformer outgoing line cabinet AH05, rectifier transformer TR2, silicon rectifier cabinet RC2, DC incoming line cabinet DH02, DC feeder cabinet DH04, grid isolation cabinet DH03, battery cabinet WKG2, power supply cabinet WKG1, and central control cabinet WKS; it also includes: air conditioner outdoor unit, air conditioner indoor unit, fire-fighting gas cylinders, and other equipment. This structure and connection relationship are common in conventional substations, and will not be described in detail in this embodiment.

[0063] The 1# rectifier transformer outgoing line cabinet AH06 is currently used by the main station for connecting to the common busbar, while the 2# rectifier transformer outgoing line cabinet AH05 is reserved for future expansion by connecting to substations. The number of 2# rectifier transformer outgoing line cabinets AH05 can be set according to the estimated power requirements; this embodiment does not impose specific limitations.

[0064] Figure 4 This is a schematic diagram of a box-type traction substation substation 11 provided in an embodiment of this application, as shown below. Figure 4 As shown, the substation is an independent box-type power module that can be plugged in and out at any time. It contains only three functional units: the first rectifier transformer TR1, the first silicon rectifier cabinet RC1, and the first DC incoming line switch cabinet DH01. The structure is more compact and the cost is lower. Figure 5 This application provides a schematic diagram of the expansion of a box-type traction substation substation 11, as shown in the embodiment. Figure 5 As shown, the area within the dashed box represents the substation expansion section. When expansion is needed, the substation's first rectifier transformer TR1 is quickly connected via a high-voltage cable. The reserved "electrical interface" allows for hot-swapping without power interruption.

[0065] Specifically, when the main station needs to be expanded, the rectifier transformer of the substation is quickly connected via a high-voltage cable. Through parameter settings, the primary winding of the main station rectifier transformer is shifted by +7.5°, and the primary winding of the substation rectifier transformer is shifted by -7.5°. The two rectifier transformers of the main and substations operate in parallel to form a 24-pulse output.

[0066] In addition, the central control platform can collect real-time operating data such as power, temperature, and insulation of the main station and substations through a two-way communication link. It can also control the switching on and off of the main station and substations based on traffic flow and operating data, and achieve dynamic adjustment.

[0067] Figure 6(a) is a schematic diagram of a mother station and daughter station combination provided in an embodiment of this application; Figure 6(b) is a schematic diagram of another mother station and daughter station combination provided in an embodiment of this application; Figure 6(c) is a schematic diagram of another mother station and daughter station combination provided in an embodiment of this application. As shown in Figures 6(a), 6(b), and 6(c), the daughter station and mother station can be flexibly installed in terms of layout structure, and can be stacked, placed sideways, or installed at the rear. Depending on actual needs, the daughter station expansion station and the mother station substation achieve a tight and stable electrical connection and data interaction through efficient electrical connection components, quickly fulfilling expansion requirements.

[0068] The traction power supply system for electrified highways provided by this utility model allows for pluggable connection of the substation 11 to the pre-reserved rectifier output cabinet in the prefabricated traction substation mother station 10. In the early stages of electrified highway power supply construction, only the prefabricated traction substation mother station 10 needs to be built to meet basic power supply requirements. As highway transportation demand increases or road sections climb, the substation 11 can be adaptively connected to the prefabricated traction substation mother station 10 to achieve capacity expansion. This eliminates the need for excessive margin in the early construction phase, and the substation structure is simpler and less expensive than the mother station, avoiding resource waste caused by capacity expansion. The central control platform reads the operating data of the mother station and substations in real time through two-way communication. After capacity expansion, the status can also be controlled remotely through power dispatch. The power capacity can be adjusted according to traffic flow, matching the high-frequency and large-amplitude load fluctuations of the electrified highway in real time, avoiding waste of capacity resources during low-demand periods.

[0069] According to the above embodiments, specifically, the box-type traction substation bus station 10 also includes an insulation detection device;

[0070] The insulation testing device is installed between the positive busbar and the negative busbar of the common busbar;

[0071] The insulation detection device is connected to the station controller of the box-type traction substation bus station 10, and sends short circuit detection information, open circuit detection information, real-time insulation detection information of DC system, insulation detection information of DC feeder cable and contact network, and voltage deviation information between DC positive and negative poles to the station controller so that the station controller can trigger protection action.

[0072] The insulation detection device is connected to the central control platform and uploads short-circuit detection information, open-circuit detection information, real-time insulation detection information of DC system, insulation detection information of DC feeder cable and contact network, and voltage deviation information between DC positive and negative poles to the central control platform.

[0073] Because the overhead contact line of the electrified highway system is powered by DC 1500V and is an ungrounded system, an insulation detection device is installed between the DC 1500V positive busbar and the negative busbar in the DC switch cabinet of the bus station to detect the insulation status of the DC positive and negative poles to ground in real time (real-time insulation resistance value) and transmit the detection value to the integrated automation system in the station.

[0074] In the event of a ground fault in either the positive or negative contact wire of the overhead contact system, or a short circuit to ground in either the DC busbar of the substation or the main station, the insulation detection device will trigger an alarm when it detects that the insulation resistance value of either the positive or negative DC pole to ground is lower than the set insulation resistance threshold. The alarm status will then be fed back to the station controller. The station controller, based on data logic and safety protection settings, will directly trigger the DC fast circuit breaker in the DC feeder cabinet to automatically disconnect the external DC output. The aforementioned DC insulation detection device provides RS485 and Ethernet standard communication interfaces for connection to a remote backend, enabling data upload. For example, when the insulation resistance drops to the set threshold of 25kΩ, the station controller immediately locks the closing circuit, and the main station and substation are simultaneously de-energized to prevent the fault from escalating. Simultaneously, the central control platform pushes the Geographic Information System (GIS) coordinates and fault type, allowing maintenance personnel to confirm the fault with a portable insulation tester, eliminating the need for a full power outage for troubleshooting.

[0075] According to the above embodiment, specifically, the top of the box-type traction substation bus station 10 is provided with slide rails on both sides, and the ends of the slide rails are provided with limit blocks and positioning sensors;

[0076] The bottom of the box-type traction substation 11 is equipped with a slot corresponding to the slide rail, and a locking tongue is embedded in the slot; when the box-type traction substation 11 is pushed along the slide rail to the limit block, the positioning sensor is triggered, and the locking tongue automatically pops out and engages with the slide rail.

[0077] The positioning sensor is connected to the station controller and sends fixed status information.

[0078] The slide rail refers to the longitudinally arranged rails on both sides of the top of the mother station, which can be C-shaped channel steel or rectangular guide rail; the limit block is welded to the end of the slide rail for mechanical stopping; the position sensor is a micro switch or magnetic reed switch, fixed inside the block.

[0079] The slots refer to the guide grooves milled at the four corners of the bottom of the substation, with spring locking tongues embedded in the grooves. When the substation is pushed into the stop along the slide rail, the locking tongues are ejected by the spring force and engage with the side holes of the slide rail, forming a rigid connection. The position sensor is connected to the controller inside the station via a shielded cable, outputting dry contact signals or RS485 messages to indicate the locking status in real time.

[0080] The length of the slide rail, the number of locking tongues, and the type of sensor are not limited to specific specifications and can be adjusted according to the weight of the substation or the available space. By placing the substation above the mother station, the footprint is reduced, and no pre-embedded civil engineering components are required.

[0081] According to the above embodiments, specifically, a rectifier temperature controller is installed in the first rectifier transformer, a data monitoring and acquisition device is installed in the first silicon rectifier cabinet, and a measurement and control instrument is installed in the first DC incoming switch cabinet;

[0082] The rectifier temperature controller, data monitoring and acquisition device, and measurement and control instruments are connected to the communication management unit of the box-type traction substation bus station 10 through the RS485 interface reserved in the first DC incoming switch cabinet.

[0083] The rectifier temperature controller refers to the temperature acquisition unit embedded in the winding and oil temperature probe of the first rectifier transformer, which can obtain the hot spot temperature of the winding through the PT100 / fiber optic temperature probe; the data monitoring and acquisition device refers to the distributed I / O module installed in the first silicon rectifier cabinet, which can acquire silicon stack temperature, fan current, and bus voltage ripple; the measurement and control instrument refers to the multi-functional electricity meter in the first DC incoming switch cabinet, which records DC current, voltage, power, and arc intensity in real time.

[0084] The integrated automation system within the main station mainly consists of an internal communication layer and a bay equipment layer. The internal communication layer is equipped with a data management control cabinet, which contains a main control management unit, integrated measurement and control device, communication management unit, hard disk recorder, and a Power Over Ethernet (POE) switch. The communication management unit adopts a dual-machine hot standby configuration. When the main machine fails, the standby machine automatically switches to the working state and takes over the work of the main machine.

[0085] The communication management unit mainly communicates with the substations and master stations in the interval equipment layer through the RS485 communication interface to realize equipment status monitoring and control.

[0086] According to the above embodiment, specifically, the box-type traction substation substation 11 also includes: a video monitoring system;

[0087] The video surveillance system includes cameras, Ethernet communication modules, and video storage units;

[0088] The camera is connected to the central control platform and the mother station 10 of the box-type traction substation via an Ethernet communication module, and the camera is also connected to the video storage unit.

[0089] This embodiment constructs a closed-loop video surveillance system within the substation, encompassing front-end acquisition, edge storage, and remote transmission. It is specifically designed for scenarios such as unattended operation on electrified highways, random traffic flow, and sudden faults. The cameras are located on the top of the rectifier transformer cabinet, silicon rectifier cabinet, and DC incoming switch cabinet. The Ethernet communication module transmits the video captured by the cameras to the main station communication management unit and the central control platform. The video storage unit is used for local loop recording.

[0090] Because faults in the overhead contact system of electrified highways are often accompanied by pantograph arcing or foreign object intrusion, cameras can trigger motion detection within 0.1 seconds, pushing alarm images to the central control platform via Ethernet communication modules. Maintenance personnel can locate the faulty area without going to the site. If communication is interrupted, the video storage unit continues to record locally and automatically resumes transmission after the network is restored, ensuring data integrity.

[0091] According to the above embodiments, specifically, the box-type traction substation bus station 10 also includes a grid-connected disconnect switch cabinet;

[0092] The power grid isolation switch cabinet includes: a positive isolation knife switch and a negative isolation knife switch;

[0093] One end of the positive and negative isolating knife switches is connected to the DC feeder cabinet, and the other end is connected to the contact network.

[0094] In this embodiment, a clearly disconnectable electrical isolation point is formed between the DC feeder cabinet and the 1500 V contact network by using a positive and negative double-pole isolating knife switch.

[0095] Because electrified highways are long and vehicles pass through randomly, any maintenance of the overhead contact line requires a reliable isolated power supply. Therefore, the grid disconnect switchgear is installed at the "DC feeder outlet of the main station". When the main station needs to cooperate with the substation for capacity expansion or rectifier unit replacement, maintenance personnel only need to open the double-pole disconnect switch to create a clear disconnection, without remote power outage. The disconnect switch position signal is transmitted back to the station controller through auxiliary contacts, and then uploaded to the central control platform by the communication management unit, enabling remote visual confirmation.

[0096] According to the above embodiments, specifically, the box-type traction substation substation 11 also includes: an industrial air conditioner, an infrared thermal imaging monitoring module, and an electric proportional regulating air valve;

[0097] The industrial air conditioner is installed inside the top of the box-type traction substation 11;

[0098] Multiple infrared thermal imaging monitoring modules are respectively installed inside the top of the first rectifier transformer and the first silicon rectifier cabinet;

[0099] The input end of the electric proportional regulating air valve is connected to the main air supply pipe of the industrial air conditioner, and the multiple output ends of the electric proportional regulating air valve are connected to the air supply port on the top of the first rectifier transformer and the first silicon rectifier cabinet through multiple branch air pipes.

[0100] The infrared thermal imaging monitoring module is communicatively connected to industrial air conditioners and electric proportional regulating valves.

[0101] The industrial air conditioner refers to the micro-positive pressure industrial air conditioner installed on the top of the substation, whose main air supply duct runs through the length of the enclosure; the infrared thermal imaging monitoring module is a multi-point infrared array, which is fixed on the top of the first rectifier transformer and the first silicon rectifier cabinet respectively, and outputs two-dimensional temperature field data in real time; the inlet of the electric proportional regulating air valve is bolted to the main air supply duct, and the outlet is connected to the air supply port on the top of each compartment through the branch air pipe, forming a main-branch tree-like air supply network.

[0102] In this embodiment, when the infrared module detects that any local hot spot in the cabin exceeds a set threshold, it sends a proportional opening command to the air valve via the RS485 bus. The air valve then increases the airflow in that branch accordingly, directing the cooling airflow directly at the hot spot for precise heat dissipation. The air valve opening feedback signal is synchronously transmitted back to ensure that the air supply distribution matches the real-time heat load.

[0103] According to the above embodiment, specifically, an electromagnetic lock body is pre-embedded at each of the four corners of the bottom plate of the box-type traction substation 11, with the iron core of the electromagnetic lock body facing downwards.

[0104] Four composite suction cups are fixed on the top plate of the box-type traction substation bus station 10, which are coaxial with each electromagnetic lock body.

[0105] The suction cup coil and the electromagnetic lock body coil are energized and attracted together.

[0106] This embodiment provides a boltless, repeatable, and highly reliable positioning solution for the substation and the mother station through a coaxial attraction structure of electromagnetic lock body and composite suction cup.

[0107] The electromagnetic lock body refers to the DC electromagnets pre-embedded in the four corners of the bottom plate of the substation box, with the iron core pointing vertically downwards; the composite chuck refers to the chuck at the corresponding position on the top plate of the mother station, with the axes of the two coinciding.

[0108] When the substation is pushed into the limit stop along the slide rail, the positioning sensor closes, energizing both the suction cup coil and the lock body coil. The combined effect of the permanent magnet pre-attraction and the electromagnetic superimposed attraction instantly locks the substation. When power is off, the permanent magnet maintains residual attraction to prevent accidental slippage; to remove it, a 0.5s pulse in the opposite direction will fully release it, completing the unlocking process. This structure does not limit coil voltage, attraction force level, or the addition of a manual unlocking handle, and can be expanded to be both electric and manual, suitable for stacked, side-mounted, or rear-mounted installations.

[0109] According to the above embodiments, specifically, the box-type traction substation substation 11 also includes: a fire control system;

[0110] The fire control system includes: smoke sensors, aerosol fire extinguishing cylinders, rotary sprinklers, cylinder solenoid valves, and fire control panels;

[0111] The smoke sensor is installed on the top of the enclosure and is connected to the fire control panel.

[0112] The solenoid valve at the bottle opening is installed at the bottle opening of the aerosol fire extinguishing bottle. The solenoid valve is connected to one end of the branch pipe, and the other end of the branch pipe is connected to the rotary nozzle. The fire control panel is connected to the solenoid valve at the bottle opening.

[0113] The smoke sensor is an aspirating photoelectric smoke detector located at the top center of the substation enclosure. It detects combustible suspended particles in the rectifier transformer compartment, silicon rectifier compartment, and DC switch cabinet compartment in real time. Its signal line is connected to the fire control board via cable as a trigger condition.

[0114] The aerosol fire extinguishing cylinder is a steel cylinder containing aerosol agent, with a solenoid valve installed at the cylinder opening. The valve outlet is connected to a rotating nozzle on the top of each compartment via a stainless steel branch pipe, ensuring that the agent covers the entire equipment area. The solenoid valve coil is driven by the relay output of the fire control panel, and is activated internally upon receiving a smoke sensor alarm or a remote manual command, releasing the extinguishing agent to provide fire extinguishing protection for unattended outdoor environments on electrified highways.

[0115] According to the above embodiments, specifically, the box-type traction substation substation 11 also includes: multiple compartment fireproof partitions;

[0116] Fireproof partitions are installed between adjacent compartment walls of the first rectifier transformer, the first silicon rectifier cabinet, and the first DC incoming switch cabinet, and the fireproof partitions are welded to the enclosure frame around their perimeter.

[0117] A "fireproof partition between compartments" is added inside the substation to create a physical firewall between the rectifier transformer, silicon rectifier cabinet and DC incoming switch cabinet, ensuring that flames and high-temperature smoke do not spread laterally in the event of a fire in any compartment.

[0118] Preferably, the fireproof partition adopts a double-layer steel plate sandwich structure, with the core material being ceramic fiber or aluminum silicate fiber, and is continuously welded to the enclosure frame on all four sides to form a smoke-free joint. In addition, the inter-compartment fireproof partition also includes an electromagnetic compatibility (EMC) shielding layer to reduce electromagnetic interference between the rectifier unit and the switchgear, thereby improving system reliability.

[0119] The traction power supply system for electrified highways provided by this utility model has been described in detail above. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

[0120] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A traction power supply system for an electrified highway, characterized in that, include: Central control platform, multiple prefabricated traction substation mother stations, and multiple prefabricated traction substation daughter stations; The box-type traction substation includes: a first rectifier transformer, a first silicon rectifier cabinet, and a first DC incoming switch cabinet; the output terminal of the first rectifier transformer is connected to the input terminal of the first silicon rectifier cabinet, and the output terminal of the first silicon rectifier cabinet is connected to the input terminal of the first DC incoming switch cabinet. The box-type traction substation bus station is connected to the contact network and is located at the corresponding line section of the contact network on the electrified highway. The box-type traction substation bus station includes multiple rectifier transformer outgoing cabinets, of which at least one rectifier transformer outgoing cabinet has a reserved electrical interface. The electrical interface can be plugged into the input terminal of the first rectifier transformer via a cable, and the output terminal of the first DC input switch cabinet is connected to a common busbar. The central control platform has a bidirectional communication connection with each of the prefabricated traction substation mother stations and prefabricated traction substation daughter stations. The central control platform controls the switching on or off of the prefabricated traction substation mother stations and prefabricated traction substation daughter stations.

2. The traction power supply system for electrified highways according to claim 1, characterized in that, The box-type traction substation bus station also includes an insulation detection device; The insulation detection device is installed between the positive busbar and the negative busbar of the common busbar; The insulation detection device is connected to the station controller of the box-type traction substation bus station, and sends short circuit detection information, open circuit detection information, real-time insulation detection information of DC system, insulation detection information of DC feeder cable and contact network, and voltage deviation information between DC positive and negative poles to the station controller, so that the station controller triggers protection action; The insulation detection device is communicatively connected to the central control platform and uploads short-circuit detection information, open-circuit detection information, real-time insulation detection information of the DC system, insulation detection information of the DC feeder cable and the contact network, and voltage deviation information between the positive and negative poles of the DC system to the central control platform.

3. The traction power supply system for electrified highways according to claim 2, characterized in that, The box-type traction substation bus station is equipped with slide rails on both sides of the top of the box, and the ends of the slide rails are equipped with limit blocks and positioning sensors; The bottom of the box-type traction substation is provided with a slot corresponding to the slide rail, and a locking tongue is embedded in the slot; when the box-type traction substation is pushed along the slide rail to the limit block, the positioning sensor is triggered, and the locking tongue automatically pops out and engages with the slide rail. The positioning sensor is connected to the station controller and sends fixed status information.

4. The traction power supply system for electrified highways according to claim 1, characterized in that, A rectifier temperature controller is installed inside the first rectifier transformer; a data monitoring and acquisition device is installed inside the first silicon rectifier cabinet; and a measurement and control instrument is installed in the first DC input switch cabinet. The rectifier temperature controller, the data monitoring and acquisition device, and the measurement and control instrument are connected to the communication management unit of the box-type traction substation bus station through the RS485 interface reserved in the first DC incoming switch cabinet.

5. The traction power supply system for electrified highways according to claim 4, characterized in that, The box-type traction substation also includes: a video monitoring system; The video surveillance system includes cameras, an Ethernet communication module, and a video storage unit; The camera is connected to the central control platform and the mother station of the box-type traction substation via an Ethernet communication module, and the camera is also connected to the video storage unit.

6. The traction power supply system for electrified highways according to claim 1, characterized in that, The box-type traction substation mother station also includes an internet disconnect switch cabinet; The power grid isolation switch cabinet includes: a positive isolation knife switch and a negative isolation knife switch; One end of the positive isolation switch and the negative isolation switch are connected to the DC feeder cabinet, and the other end of the positive isolation switch and the negative isolation switch are connected to the contact network.

7. The traction power supply system for electrified highways according to claim 5, characterized in that, The box-type traction substation also includes: industrial air conditioning, infrared thermal imaging monitoring module, and electric proportional regulating air valve; The industrial air conditioner is installed inside the top of the box-type traction substation substation; Multiple infrared thermal imaging monitoring modules are respectively installed inside the top of the first rectifier transformer and the first silicon rectifier cabinet. The input end of the electric proportional regulating air valve is connected to the main air supply pipe of the industrial air conditioner, and the multiple output ends of the electric proportional regulating air valve are connected to the air supply port on the top of the first rectifier transformer and the first silicon rectifier cabinet through multiple branch air pipes. The infrared thermal imaging monitoring module is communicatively connected to the industrial air conditioner and the electric proportional regulating valve.

8. The traction power supply system for electrified highways according to claim 3, characterized in that, An electromagnetic lock body is pre-embedded at each of the four corners of the bottom plate of the box-type traction substation, with the iron core of the electromagnetic lock body facing downwards. Each of the box-type traction substation bus station boxes has four composite suction cups fixed to its top plate, which are coaxial with each of the electromagnetic lock bodies. The suction cup coil and the electromagnetic lock body coil are energized and attracted together.

9. The traction power supply system for electrified highways according to claim 1, characterized in that, The box-type traction substation also includes: a fire control system; The fire control system includes: smoke sensor, aerosol fire extinguishing bottle, rotary nozzle, bottle mouth solenoid valve, and fire control panel; The smoke sensor is installed on the top of the enclosure and is connected to the fire control panel. The solenoid valve at the bottle opening is installed at the bottle opening of the aerosol fire extinguishing bottle. The solenoid valve at the bottle opening is connected to one end of the branch pipe, and the other end of the branch pipe is connected to the rotating nozzle. The fire control panel is connected to the solenoid valve at the bottle opening.

10. The traction power supply system for electrified highways according to any one of claims 1-9, characterized in that, The box-type traction substation also includes: multiple compartment fireproof partitions; The fireproof partition between the compartments is installed between the adjacent compartment walls of the first rectifier transformer, the first silicon rectifier cabinet, and the first DC incoming switch cabinet, and the fireproof partition between the compartments is welded to the frame of the enclosure.

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