213 results about "Railway electrification system" patented technology

The invention belongs to the technical field of image processing, and particularly relates to a contact network defect identification method based on multiple modalities, which comprises the following steps of: 1, acquiring a visible light image sequence and an infrared thermal imaging image sequence of a target contact network, and carrying out time alignment and temperature calibration to obtain a unified reference frame sequence and a thermal vision consistency label set; 2, constructing a structure change graph and an overheat candidate graph in the obtained unified reference frame sequence, calling a cross-modal physical semantic autocatalysis recombination algorithm, and taking a generated thermal vision consistency label set as a constraint; and step 3, taking the output fusion evidence body as input, combining the thermal vision consistency label set and the reversible channel audit record to verify the candidate area, obtaining a defect target, and outputting a defect category and a defect position. According to the method, the precision and stability of defect detection are improved, the traceability of the result is also realized, and a reliable guarantee is provided for intelligent operation and maintenance of the electrified railway overhead line system.

The invention, which relates to the technical field of electrified railway operation and maintenance, discloses a deep-learning-based intelligent laser clearing system for an overhead line system, comprising a time sequence baseline re-calibration module, an illumination sudden change identification module, an energy overshoot prediction module, an energy risk constraint module, a heat accumulation weakening module and a steady-state closed-loop regulation and control module. The method comprises the following steps: establishing a unified event time baseline, collecting an illumination intensity sequence of an overhead line system operation environment, constructing a non-uniform sampling re-calibration matrix, eliminating clock skew and sensing lag through time re-calibration, and obtaining a stable time sequence reference. According to the method, the illumination time sequence precision is improved through re-calibration and residual analysis, the feedforward model is combined to predict overshoot, the attitude parameters limit the high-risk interval, the dynamic threshold value and the phase compensation inhibit the laser abnormal wave crest, the thermal damage risk is reduced, and the intelligence, the safety and the stability of the difference clearing operation are improved.

The utility model relates to the technical field of current acquisition and monitoring, and provides an electrified railway traction backflow acquisition device, which comprises a first shell internally integrated with a data collection unit; the second shell is arranged on the live cable, and a self-energy-taking unit is integrated in the second shell and used for taking electricity from the live cable in an induction mode; the at least two third shells are arranged on the to-be-detected cable in a one-to-one correspondence mode, and current acquisition sensors are arranged in the third shells and used for acquiring current parameters in the to-be-detected cable; the second shell and the third shell are both connected with the first shell. According to the utility model, the data collection unit, the self-energy-taking unit and the current acquisition sensor are respectively arranged in the three shells, so that the installation and the monitoring are more convenient, and the device can be flexibly applied to different positions of a traction backflow path of an electrified railway, and has strong portability; a plurality of current acquisition sensors can be used at the same time to detect a plurality of cables, and the monitoring efficiency of the cables is improved.

The invention relates to the technical field of railway contact networks, in particular to an electrified railway anti-icing contact network and a control system.The device comprises a contact network wire and a brim flow guide structure arranged on the contact network wire in a sleeving mode; the upper part of the catenary wire is an arc-shaped surface, the middle part of the catenary wire is provided with a dovetail groove, and the lower part of the catenary wire is a conductive surface; the shape of the upper portion of the brim diversion structure is consistent with that of the upper portion of the contact network wire, the middle of the brim diversion structure extends towards the two sides to form brim-shaped diversion plates, and the brim-shaped diversion plates are used for guiding airflow to drive freezing rain water drops to slide towards the two sides so as to avoid a conductive surface; the brim-shaped flow guide plate is positioned below the dovetail groove; and after the cap-brim-shaped guide plate is sleeved on the overhead line system wire, the conductive surface can be in contact with the pantograph. Structural innovation and collaborative prevention and control logic are integrated, and the problems that an existing electrified railway anti-icing scheme is single, limited in function and insufficient in adaptability are solved.

The invention discloses an electrified railway hybrid electric energy quality treatment device which comprises a balancing transformer, a TCLC branch and an active electric energy quality regulator. The balancing transformer comprises a primary side end and a secondary side end, the primary side end is connected with a three-phase public power grid in the traction substation, the secondary side end is provided with a series winding used for being connected with an alpha-phase traction network and a closed-loop triangular winding used for being connected with a beta-phase traction network, and the closed-loop triangular winding is provided with a first self-coupling tap and a second self-coupling tap; the first self-coupling tap, the second self-coupling tap and the remaining vertexes are connected into the TCLC branch in parallel; and the other end of the TCLC branch is connected with an IGBT switch bridge arm of the active power quality regulator. The invention further provides an electrified railway hybrid power quality management control method. According to the device cooperation control method provided by the invention, the overall cost and the installation space of the device are effectively reduced on the premise that the problems of negative sequence, low power factor and harmonic waves existing in the traction substation are comprehensively treated.

The utility model provides a marine transportation packaging structure for concrete pillars of an electrified railway, which is used for solving the problem that the surfaces of the concrete pillars are extremely easy to damage in the marine transportation process. An electrified railway concrete pillar marine transportation packaging structure comprises a plurality of limiting wooden frames, the limiting wooden frames are arranged on two parallel concrete pillars in a sleeving mode, steel belt grooves are formed in the limiting wooden frames in the circumferential direction, steel belts are arranged in the steel belt grooves, the steel belts are connected end to end to surround the limiting wooden frames, and cloth liners are arranged between the limiting wooden frames and the concrete pillars. Isosceles triangle wooden wedges are arranged between the concrete supporting columns, the bevel edges of the wooden wedges abut against the side walls of the concrete supporting columns, the bottom edges of the wooden wedges abut against the limiting wooden frames, fixing belts are wound around the concrete supporting columns, and the two ends of the fixing belts are fixed to the two sides of the container respectively. According to the utility model, the concrete support can be limited from shaking in the container, and the stability in the transportation process is ensured.

The invention discloses a method, a system, a medium, equipment and a product for evaluating the landslide risk of a photovoltaic site along a railway in the technical field of electrified railway new energy development. The method comprises the following steps: carrying out Pearson correlation analysis on a railway line photovoltaic site landslide risk preliminary evaluation factor of a target site to obtain a railway line photovoltaic site landslide risk evaluation factor; according to the landslide risk evaluation factor of the photovoltaic site along the railway and the project location sample data set, carrying out landslide prediction by using a BP neural network to obtain a prediction result; and obtaining a contribution value of each photovoltaic site landslide risk evaluation factor along the railway to a prediction result in a prediction process by using an SHAP model, and obtaining a photovoltaic site landslide risk evaluation result along the railway. Aiming at the scene of photovoltaic along the railway, the problem of difficulty in site selection and the like is solved, and the photovoltaic construction efficiency and quality along the railway can be effectively improved.

The utility model discloses an electric split-phase protection device for a contact network, and relates to the field of electrified railway traction power supply systems. The system is composed of a signal acquisition unit, an interphase fault identification unit, a fault removal unit, a power supply unit, a man-machine interface unit and an information interaction unit. An analog quantity acquisition circuit of the signal acquisition unit is connected with the interphase fault identification unit through a high-speed PCIE bus. The switching value acquisition circuit, the electric split-phase fault identification unit, the fault removal unit, the information interaction unit and the man-machine interface unit of the signal acquisition unit are connected together through the CAN bus, and the power supply unit supplies power to each unit through a device backboard power supply loop. The device is used for identifying and removing the phase-to-phase fault of the overhead line system, can improve the identification rate of the phase-to-phase fault, shortens the fault removal time, and achieves the quick removal of the fault, thereby avoiding the large-area power failure of a traction power supply system, and guaranteeing the normal operation of an electric locomotive.

This invention discloses a constant tension overhead line guiding device for electrified railway catenary, relating to the field of railway catenary technology. It includes: a high-position mounting frame fixedly connected to a constant tension overhead line vehicle; a mounting plate fixed to the top of the high-position mounting frame; and multiple opposing guide components mounted on the mounting plate. It also includes: a support cylinder rotatably connected to the guide components; an adjusting arm slidably sleeved inside the support cylinder; and a monitoring unit connected to the support cylinder for detecting tilting of cables passing through the guide components. Through the monitoring unit, this invention can detect in real time whether the cables passing through the guide components are tilting. When the cable tilts, it generates a lateral force on the support cylinder, causing the adjusting arm to slide within the support cylinder. Furthermore, by controlling the action of the adjusting unit, the position of the adjusting arm, support cylinder, and guide components is adjusted, achieving real-time correction of the cable's direction.

The present application relates to the technical field of electrified railway control, and discloses a phase control closing method and a heavy haul locomotive circuit breaker, the method comprising: step one, establishing equivalent mathematical models for the heavy haul locomotive, traction substation, AT substation and traction network; step two, establishing a vehicle-network-station simulation model based on a MATALB / Simulink simulation platform; step three, obtaining the influence of different line loads on phase selection closing according to the vehicle-network-station simulation model; and step four, determining a phase control closing scheme and conducting test verification. The phase control closing and opening method of the heavy haul locomotive circuit breaker with the above structure can establish equivalent mathematical models for the heavy haul locomotive, traction substation, AT substation and traction network, and then establish a vehicle-network-station simulation model, analyze the influence of different line loads on phase selection closing, and determine a phase selection closing scheme according to the breakdown characteristics of the circuit breaker and the analysis results. The phase selection closing scheme determined through test verification can achieve the purpose of reducing the overvoltage of the closing system.

The utility model provides an overhead line system composite material cantilever device insulation connector comprising a first insulation double-lug assembly, a second insulation double-lug assembly detachably connected with the first insulation double-lug assembly, and a first locking assembly for locking the first insulation double-lug assembly and the second insulation double-lug assembly. A gap for insertion of a cantilever is formed between the first insulating double-lug assembly and the second insulating double-lug assembly, the second insulating double-lug assembly is provided with a matching through groove, and the inner wall of the matching through groove is provided with a matching through hole; the second locking assembly and the third locking assembly are arranged on the cantilever connecting pin shaft. By adopting the structure, the cantilever connecting pin shaft is fixed by adopting a double-locking structure. Connection is simpler, the angle is freer, and the weight is lighter. The risk of partial discharge of the composite material cantilever device of the overhead line system can be avoided, and the power supply safety and reliability of the overhead line system of the electrified railway are improved.

The invention relates to the technical field of automatic detection of electrified railways, in particular to a mixed CNN-LSTM contact network dropper fault detection system and method based on an attention mechanism, and the system comprises a multi-source data collection module, a data preprocessing module, a fault judgment module and a fault judgment module. Through the system, by introducing a closed-loop judgment verification and multilayer optimization mechanism, the system can automatically identify and correct misjudgment, online self-improvement of a CNN-LSTM hybrid model is realized, and the accuracy and reliability of fault detection and the long-term adaptability to a complex field environment are remarkably improved.

The application discloses a bridge section catenary support post position automatic arrangement method and device, equipment and a storage medium, and relates to the technical field of electrified railway catenary, and comprises the following steps: configuring standard span, maximum span, minimum span and maximum allowable value of adjacent span difference as design parameters in an initial catenary plane layout; automatically obtaining bridge and bridge pier table attributes based on a bridge table and a bridge pier table; performing support offset arrangement calculation based on the design parameters and the bridge and bridge pier table attributes to obtain selected support positions; and automatically arranging catenary support posts based on the selected support positions, so as to meet the requirements of bridge type description, catenary support post position and bridge pier table distance setting, and catenary support post automatic arrangement of a bridge section.

A CT power taking device used on a 27.5 kV transmission cable of an electrified railway comprises a bracket (2) installed on the 27.5 kV transmission cable of the electrified railway, a hoop (3) arranged on the bracket (2) and a CT power taking body (1) arranged in the bracket (2), through the bracket (2) and the hoop (3), the CT power taking body (1) is closed to form an annular bracket body support, and through the CT power taking body (1), the CT power taking body (1) is connected with the bracket (2). Inductive power taking on the 27.5 kV transmission cable of the electrified railway is realized, a platform with a protection accommodating interval is mounted on the 27.5 kV transmission cable of the electrified railway, and the technical problem that a bolt fastening or welding mode is mostly adopted as a connection mode of a CT power taking sensor is solved. Therefore, the CT power taking body (1) and the 27.5 kV transmission cable of the electrified railway are prevented from being damaged in the mounting and dismounting processes.

The invention relates to the technical field of electrified railway collaborative operation, and discloses a power grid-traction network resource collaborative evaluation method and system, and electronic equipment, and the method comprises the steps: collecting real-time data of a power grid side, a traction network side and a resource side, and carrying out the preprocessing of the real-time data, and obtaining a standardized data flow; based on the standardized data flow, adjustable potential models are established for traction load, regenerative braking energy, traction station energy storage and road area photovoltaic / wind power respectively, and the adjustable potential range of each resource is obtained; based on the adjustable potential model, performing dynamic optimization evaluation through an optimization algorithm to obtain an adjustable potential evaluation result and a scheduling strategy; outputting an adjustable potential evaluation result and a scheduling strategy; based on the scheduling policy, a peak load shifting, frequency response, or renewable energy consumption application is performed. According to the method, real-time operation information can be fused, multi-resource characteristics are planned as a whole, intraday dynamic evaluation and collaboration are realized, and the flexibility resource potential of a power grid-traction network system is fully excavated.

The application discloses a fault ranging method in a 1-2 mode of a traction power supply system feeder breaker, relates to the technical field of electrified railway traction power supply, and converts the uplink and downlink feeder currents of a traction substation by means of the cross-link current of an AT substation and a partition substation, so that the first fault interval from the traction substation to the AT substation can also be subjected to fault ranging by the fault ranging principle of the cross-link current ratio method. The method simultaneously considers the difference between type I and type II substation, and the fault ranging precision of the first fault interval can be improved by using the method, the ranging error is controlled within a range of 250 meters, the fault point can be quickly positioned by operation and maintenance personnel when a fault occurs, the fault is timely disposed and the line is recovered to normal operation, and the method has important significance for guaranteeing the safe, stable and efficient operation of a railway transportation system.

The invention relates to the technical field of electric energy quality analysis and the technical field of artificial intelligence, and discloses a harmonic traceability method and device based on an electrified railway and a new energy inverter, and the method comprises the steps: obtaining the voltage spectrum amplitude of each harmonic of the new energy inverter through a trained deep belief network model, according to the voltage frequency spectrum amplitude of each harmonic wave of the electrified railway and the voltage frequency spectrum amplitude of each harmonic wave of the new energy inverter, generating a root-mean-square value of a harmonic voltage frequency spectrum of the electrified railway and a root-mean-square value of a harmonic voltage frequency spectrum of the new energy inverter; when the root-mean-square value of the harmonic voltage frequency spectrum of the electrified railway is greater than the harmonic threshold value of the electrified railway, marking the dominant equipment type of the harmonic source as the electrified railway, and when the root-mean-square value of the harmonic voltage frequency spectrum of the new energy inverter is greater than the harmonic threshold value of the new energy inverter, marking the dominant equipment type of the harmonic source as the electrified railway; and marking the dominant equipment type of the harmonic source as a new energy inverter. According to the invention, the acquisition efficiency of the dominant equipment type of the harmonic source can be improved.

The utility model relates to the technical field of electrified railway traction power supply, and particularly discloses a standby-considered uplink and downlink ground automatic neutral section passing commutation device, which is based on a standby commutation process, can timely respond and control a standby neutral section passing device to replace commutation action to continue to complete commutation when the neutral section passing device breaks down, so that the standby neutral section passing device is prevented from being damaged. The tight connection of the standby neutral section passing device in the uplink and downlink ground automatic neutral section passing commutation considering standby is realized, and the stability of train commutation entering the neutral section area is improved.

The utility model discloses a traction transformer differential protection device, which relates to the technical field of electrified railway transformer protection and comprises a first trigger circuit for triggering a first magnetizing inrush current blocking signal, a second trigger circuit for triggering a second magnetizing inrush current blocking signal and a third trigger circuit for triggering an empty charging state signal of a transformer. The fourth trigger circuit triggers a differential current waveform asymmetrical signal, the AND logic device I performs AND logic processing on a second magnetizing inrush current blocking signal, a transformer empty charging state signal and the differential current waveform asymmetrical signal, and the OR logic device I performs OR logic processing on an output result of the AND logic device I and a first magnetizing inrush current blocking signal. And triggering an excitation inrush current blocking signal according to an output result of the OR logic device 1. By adding a criterion of magnetizing inrush current locking, protection maloperation caused by magnetizing inrush current in the air-drop process of the traction transformer can be effectively avoided.

The application relates to the technical field of electrified railway traction power supply, and particularly provides a train uninterrupted power supply system and method applied to a main line and a branch line, which comprises a first substation connected to a main line catenary, a second substation connected to a branch line catenary, and a switch station arranged on the branch line catenary and located on one side of the second substation close to the main line catenary; the switch station comprises an electric section and a section feeder circuit breaker, wherein the electric section is arranged in series on the branch line catenary, and the section feeder circuit breaker is arranged in parallel at both ends of the electric section. The application realizes dynamic connection of the branch line and the main line power supply system through the cooperative power supply of the first substation, the second substation and the switch station, supports cross-zone power supply by the first substation when the switch station is turned on, and can be taken over by the local second substation after the switch station is turned off, so that the main line catenary can be safely isolated in the car collection and maintenance stage.

The invention provides a deicing method and system suitable for an electrified railway catenary, and relates to the field of catenary maintenance, and the method comprises the steps: obtaining the position information of the catenary, and calculating the height parameter of a deicing device; respectively acquiring contact network icing images before and after the working position of the deicing device, and extracting icing space domain features; performing multi-scale Retinex decomposition on the overhead line system icing image, and extracting a reflection component; the reflection component is converted from a spatial domain to a frequency domain through two-dimensional Fourier transform, and icing frequency domain features are extracted; the icing frequency domain features and the icing space domain features are fused, and fusion features of the front contact net and the rear contact net of the deicing device are obtained; and inputting the fusion features of the front and rear contact networks into a cross-type two-way convolutional neural network to obtain expected deicing pressure, calculating to obtain a deicing force parameter, and controlling a deicing device to deice according to the deicing force parameter. According to the method, the ice covered on the overhead line system can be effectively removed, the deicing speed is increased, and the deicing quality is improved.

The application discloses a fault distance measurement method and system for an electrified railway AT power supply mode, relates to the technical field of fault distance measurement, determines whether load current is contained in fault current according to impedance angle, and calculates fault current without containing load current; that is, the mixed load current is removed in the fault current calculation process, so that the accuracy of the fault current is ensured; the fault type is judged based on the self-coupling variable absorption current direction characteristics, so that the fault type judgment error caused when the fault occurs at the end section of the traction network is avoided, the fault type identification accuracy is greatly improved, and the fault distance measurement precision is improved.

The invention belongs to the technical field of electrified railway traction power supply, and particularly relates to a traction network multi-terminal longitudinal differential protection system and method in a bilateral through AT power supply mode. The system is provided with multi-terminal longitudinal differential protection elements according to uplink and downlink feeder lines, multi-terminal branches formed by traction substations, AT stations and partition stations are covered, and each branch is provided with a current transformer. The protection element comprises a power frequency variable quantity current differential element, a T line / F line current differential element and a low-voltage differential current starting element which are respectively adaptive to fault transient state and steady state characteristics, and rapid fault identification and accurate fault removal are realized through cooperative action. The method combines a current threshold criterion, a voltage criterion and an opposite-side permission signal, ensures the action quickness, selectivity, sensitivity and reliability, realizes quick removal of power supplies at two ends of a fault, reduces the fault isolation range, and ensures safe and stable operation of a traction network.

The invention relates to the technical field of intelligent control, and provides a paint spraying control method and AI control system applied to an electrified railway, and the method comprises the steps: positioning a target spraying region according to the point cloud scanning information of a to-be-painted part; based on preset paint spraying process requirements and the three-dimensional model of the target spraying area, spatial analysis is carried out to obtain spatial geometric features; generating an initial paint spraying path planning strategy through adaptive analysis of the spatial geometric features and motion constraint information in a first motion engineering model of the paint spraying robot; controlling the robot to execute operation according to an initial strategy and synchronously acquiring motion state data and surface feedback data; identifying a paint surface defect area based on the motion deviation information and generating a paint spraying path correction strategy; the motion engineering model is updated through the correction strategy, space-time matching analysis is executed in combination with the model motion planning logic and the surface features of the target area, a corrected paint spraying path and corrected spraying control information are extracted, and therefore the paint spraying path accuracy and spraying control parameter adaptability are improved.

This invention discloses a fault location method for a traction power supply system feeder circuit breaker in a 1-to-2 mode, relating to the field of electrified railway traction power supply technology. By converting the cross-connecting current between the AT substation and the section substation into the up and down feeder currents of the traction substation, the first fault interval from the traction substation to the AT substation can also be located using the cross-connecting current ratio method. This method also considers the differences between Type I and Type II substations. Using this method can improve the fault location accuracy of the first fault interval, controlling the location error within 250 meters. This ensures that maintenance personnel can quickly locate the fault point, promptly handle the fault, and restore normal line operation when a fault occurs, which is of great significance for ensuring the safe, stable, and efficient operation of the railway transportation system.

The electrified railway overhead line system dropper protection device comprises a protection device, the protection device comprises a crimping pipe connection part, a transition part and a main body line connection part which are sequentially connected from one end to the other end. The crimping tube connecting part is connected to any crimping tube in a fastening manner, and the main body line connecting part is connected to the dropper line main body line in a fastening manner. The dropper has the essential characteristics that the vibration waves transmitted to the dropper are shunted and partially absorbed, so that the damage of the vibration waves to the dropper is reduced. The utility model has the advantages that the vibration energy transmitted to the A-B part of the dropper during the operation of a locomotive is effectively shunted and partially absorbed, and the stress concentration of the two parts is greatly reduced, so that the wire breaking / breaking probability of the dropper is obviously reduced, and the stability of a contact network system is ensured.

The utility model relates to an electrified railway line measurement and control device, in particular to a multi-winding high-capacity all-insulation voltage transformer. Comprising a bottom plate and a main insulator arranged on the bottom plate, a transformer body and two primary supports connected with the transformer body are arranged in the main insulator in a sealed mode, the transformer body comprises an iron core, secondary windings and primary windings, multiple sets of secondary windings are wound on the outer side of the iron core, and the primary windings are wound on the outer sides of the multiple sets of secondary windings; the top of the main insulator is provided with two primary insulation columns, the tops of the two primary insulation columns are respectively embedded with two secondary high-voltage terminals, and the two primary high-voltage terminals are respectively connected with the two primary supports; and a secondary wiring terminal is arranged at the bottom of the main insulator. The utility model is formed by vacuum casting of epoxy resin, and has the characteristics of small volume, beautiful appearance, flexible installation, easy maintenance and complete functions.

The invention discloses an unmanned aerial vehicle inspection photovoltaic panel defect detection method and system in a railway line scene in the technical field of electrified railway new energy development. The method comprises the following steps: according to a photovoltaic panel image along a railway collected by an unmanned aerial vehicle, performing image preprocessing by using a retinex algorithm of adaptive bilateral filtering to obtain a preprocessed photovoltaic panel image; and according to the pre-processed photovoltaic panel image, photovoltaic panel defect detection is carried out by using a YOLOv8 detection algorithm introducing a CDA-net attention mechanism, and a detection result is obtained. According to the method, the problems of insufficient detection precision, large algorithm model and the like of unmanned aerial vehicle routing inspection are solved, and the reliability and practicability of unmanned aerial vehicle routing inspection in the aspect of photovoltaic panels along the railway can be effectively improved.

A traction power supply system fault calibration method applied to an electrified railway bilateral power supply mode relates to the technical field of electrified railway traction power supply systems, and mainly comprises the following steps: dividing short-circuit current distribution of different traction substations into a plurality of short-circuit current distribution modules according to short-circuit fault point positions; superposing the plurality of short-circuit current distribution modules to obtain a power supply system fault mathematical model; the method comprises the following steps: taking a traction substation feeder line, a parallel station and a partition station incoming line circuit breaker as monitoring key nodes, and performing image drawing on each current and impedance function; judging that the fault point is located on the first side or the second side of the traction substation, the upper line or the lower line of the traction network and the left side or the right side of a parallel substation; and calculating a fault position by adopting a cross-linked current ratio curve method. According to the method, the characteristic that the power flow meets mutual superposition of power flow distribution under the action of an independent power supply when the bilateral power supply double power supplies act is utilized, and fault calibration of the bilateral power supply system traction network with a more complex topological structure can be achieved.