Patents
Literature
304 results about "Railway electrification system" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
A railway electrification system supplies electric power to railway trains and trams without an on-board prime mover or local fuel supply. Electric railways use either electric locomotives (hauling passengers or freight in separate cars) or electric multiple units (passenger cars with their own motors). Electricity is typically generated in large and relatively efficient generating stations, transmitted to the railway network and distributed to the trains. Some electric railways have their own dedicated generating stations and transmission lines, but most purchase power from an electric utility. The railway usually provides its own distribution lines, switches, and transformers.
Comprehensive online monitoring system for electrified railway high-voltage cable
The invention discloses a comprehensive online monitoring system for a high-voltage cable of an electrified railway, and particularly relates to the technical field of cable monitoring. The clustering analysis module divides similar groups based on factory and use environment data; the prediction mode selection module evaluates the stability and nonlinearity degree of the environmental data, and selects an optimal prediction method to predict the environmental data; the threshold value judgment module selects a fixed or dynamic threshold value to judge a fault through comparison with similar group data; the dynamic adjustment module optimizes a fault threshold based on historical data and improves the detection precision; the alarm module triggers early warning when the monitoring data exceed a threshold value; according to the method, the operation mode of the cable is accurately matched, the monitoring precision is improved, misjudgment caused by a single data source is avoided, it is ensured that the optimal prediction method is always used under different environmental conditions, the prediction precision of future environmental data is improved, and reliable support is provided for fault judgment.
Owner:CHINA RAILWAY DESIGN GRP CO LTD +1
Enhanced YOLOv10-based electrified railway overhead line system insulator defect detection method, system, equipment and medium
The invention provides an enhanced YOLOv10-based electrified railway overhead line system insulator defect detection method, system and equipment and a medium. The method comprises the following steps: acquiring an overhead line system insulator image of a target scene through a shooting device and automatic inspection equipment; marking contact network insulators and defects in the contact network insulator image by using a marking tool, and dividing the marked image into a training set and a verification set according to a preset proportion; performing model training on the basis of the training set and the verification set, and introducing a lightweight OfficientViT module, a Wise-IoU loss function and a knowledge distillation technology in the training process to obtain a contact network insulator defect detection model based on YOLOv10; and inputting the obtained image of the to-be-detected overhead line system insulator into the overhead line system insulator defect detection model to obtain a defect detection result. The method provided by the invention improves the accuracy and efficiency of insulator defect detection.
Owner:TONGJI UNIV
Contact network defect identification method based on multiple modes
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.
Owner:CHENGDU NUOBIKAN TECH CO LTD
Cable line metal sheath protector type selection optimization method based on induced overvoltage
ActiveCN120429792AEmergency protective arrangements for limiting excess voltage/currentOvervoltageElectric cables
The invention belongs to the technical field of protector type selection optimization, and particularly relates to a cable line metal sheath protector type selection optimization method based on induced overvoltage, which comprises the following steps of: acquiring operation state data and environment state data of a cable line, analyzing and diagnosing the state of the cable line, and if the state of the cable line is abnormal, performing early warning. If the state of the cable line is normal, obtaining an initial overvoltage; correcting the initial overvoltage based on the intermittent load of the electrified railway to obtain corrected overvoltage; evaluating the insulation performance and the overvoltage hazard level of the metal sheath of each area of the current cable line; determining basic model selection indexes of the protectors based on the overvoltage hazard levels, and screening candidate protectors based on the basic model selection indexes; and performing performance evaluation on the candidate protectors, and determining an optimal protector. According to the method, the optimal protector is determined through short-term and long-term performance evaluation under multi-round screening and simulation working conditions, and reliable operation of a cable line under different working conditions is ensured.
Owner:CHINA THREE GORGES UNIV
Intelligent laser clearing system for overhead line system based on deep learning
PendingCN121282763ACleaning processes and apparatusApparatus for overhead lines/cablesLoop controlAlgorithm
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.
Owner:GANZHOU JIAEN ELECTRONIC TECHNOLOGY CO LTD
Electrified railway traction backflow collecting device
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.
Owner:CHINA RAILWAY ELECTRIFICATION ENGINEERING GROUP CO LTD
Three-dimensional multi-source stray current interference characteristic analysis and identification method based on wavelet analysis
The invention relates to a three-dimensional multi-source stray current interference characteristic analysis and identification method based on wavelet analysis. When a buried pipeline is subjected to electrical interference of different interference sources (such as high-voltage transmission line current, high-voltage direct-current grounding electrode grounding current, electrified railway and high-speed railway current, urban rail transit current and natural environment such as tidal interference current), the buried pipeline is subjected to electrical interference. And identifying and analyzing the pipe-to-ground potential and alternating current voltage fluctuation characteristics (amplitude characteristics and frequency characteristics) under stray current interference, judging the influence of interference sources on the safety and stability of the buried steel pipeline, solving the problems of analysis, identification and processing of multiple interference sources in the existing complex environment, improving the monitoring and treatment level of the interference sources of the buried steel pipeline, and improving the safety and reliability of the buried steel pipeline. Safe and reliable operation of the pipeline is ensured.
Owner:NANJING BOILER & PRESSURE VESSEL SUPERVISION & INSPECTION INST +1
Electrified railway anti-icing contact net and control system
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.
Owner:CENT SOUTH UNIV
Electrified railway conductive busbar aluminum profile and manufacturing method thereof
The invention discloses an electrified railway conductive busbar aluminum profile and a manufacturing method thereof. The aluminum profile is composed of, by mass, 0.5%-0.6% of Mg, 0.45%-0.55% of Si, 0.05%-0.15% of RE, smaller than or equal to 0.2% of Fe and the balance Al and inevitable impurities, and RE is mixed rare earth. The manufacturing method sequentially comprises the steps of smelting and preparing aluminum alloy liquid, blowing and refining, online grain refining, degassing in a degassing box, filtering in a filtering box, semi-continuous casting, high-temperature homogenizing treatment, extrusion forming, online quenching, stretching and straightening, saw cutting and aging heat treatment. By scientifically designing the composition of the aluminum profile and carrying out deep purification treatment on the aluminum alloy liquid, the problem of mutual restriction among strength, elasticity modulus and conductivity is solved, meanwhile, the strength, elasticity modulus and conductivity of the aluminum profile are improved, and the aluminum profile has excellent comprehensive performance and is suitable for popularization and application. And the requirements of rapid development of high-speed trains such as subways, high-speed rails and maglev trains are met.
Owner:GUANGDONG XINGFA ALUMINUM +1
Electrified railway hybrid electric energy quality treatment device and control method
PendingCN121238555APolyphase network asymmetry elimination/reductionReactive power adjustment/elimination/compensationPower qualityPower factor
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.
Owner:NANHUA UNIV
Railway signal novel LED lamp control system and method
The invention relates to the technical field of traffic information engineering and control, in particular to a railway signal novel LED lamp control system and method, and the system comprises a DC power supply, a control unit, an interlocking machine, a transmission module, a DC voltage regulation and monitoring device, a main filament breakage alarm module and a DC LED lamp. The direct-current power supply, the control unit, the transmission module, the direct-current voltage regulating and monitoring device and the direct-current LED lamp are sequentially connected together, the control unit is connected with the interlocking machine, and the direct-current voltage regulating and monitoring device is connected with the main filament breakage alarm module; by adopting the filter circuit, the redundancy switching circuit and the power supply adjusting circuit, the bypass alternating current electrified railway traction current interference and the lighting interference of a common mode and a differential mode on the direct current LED lamp can be filtered out, wrong lighting is prevented, the redundancy switching circuit judges the current in a loop, the auxiliary LED lamp is switched to be lightened when the main LED lamp is broken, and the safety of the main LED lamp is ensured. The monitoring of the railway signal direct current LED lamp filament is realized.
Owner:LANZHOU DACHENG RAILWAY SIGNAL CO LTD
Equivalent method of bilateral traction power supply system
PendingCN120320326AAc networks with different sources same frequencyElectric power systemMathematical model
The invention relates to the technical field of alternating-current traction bilateral power supply, in particular to an equivalent method of a bilateral traction power supply system. For a bilateral power supply traction power supply system, a vehicle-network-source looped network coupling mathematical model is established based on a coupling relationship between a power system and the traction power supply system and an equivalent strategy of a power network. According to the established model, system circulation calculation method research is carried out during bilateral power supply of two traction stations and no-load operation of a traction network, a related calculation formula is deduced, and a power supply energy flow coupling mechanism of a multi-power-supply looped network is analyzed. Compared with a traditional equivalent model, the model provided by the invention more accurately and clearly explores the range and degree of the influence of the equalizing current on the three-phase power system, and can provide great help for subsequent research of the influence of electrified railway bilateral power supply on the power system and realization of independent innovation of a bilateral power supply system.
Owner:SOUTHWEST JIAOTONG UNIV
Intelligent monitoring system and method for overhead line system section insulator
The invention relates to the technical field of electrified railway catenaries, and provides an intelligent monitoring system and method for a catenary section insulator, and the method comprises the steps: collecting a visible light video, converting the visible light video into an HSV color space, and extracting the contour of a pantograph slide plate through combining the material and shape features; an optical flow method is adopted to track the contact track, the number of effective contact times is counted, and voltage and temperature data are synchronized to analyze performance changes before and after contact; and finally, a relation graph model is constructed, trend prediction and abnormal early warning of the state of the section insulator are realized, so that the operation state of the section insulator in the overhead line system can be continuously monitored in real time, advance perception and trend pre-judgment of faults are realized, and the safety and reliability of a railway system are effectively improved.
Owner:QINGDAO POWER SUPPLY SECTION OF CHINA RAILWAY JINAN BUREAU GRP CO LTD
Electrified railway concrete strut marine transportation packaging structure
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.
Owner:CHINA HARBOUR ENGINEERING +1
Method, system, medium, equipment and product for evaluating landslide risk of photovoltaic site along railway
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.
Owner:CHINA ENERGY CONSTRUCTION GROUP INVESTMENT CO LTD +1
Contact network electric split-phase protection device
ActiveCN224153961Uquick resectionEmergency protective circuit arrangementsContact networkFault recognition
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.
Owner:KUNMING RAILWAY BUREAU PASSENGER TRANSPORT CO
Constant tension stringing guide device for overhead contact system of electrified railway
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.
Owner:SICHUAN TIEZHENG ENG INSPECTION CO LTD
A phase-controlled closing method and heavy haul locomotive circuit breaker
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.
Owner:SHUOHUANG RAILWAY DEV +1
An Equivalent Method for Through-Connect Power Supply System of Electrified Railway
ActiveCN116054126BPolyphase network asymmetry reductionAc networks with different sources same frequencyPort (circuit theory)Power flow
The present invention discloses an equivalent method for an electrified railway through-power supply system. This method uses two-port circuit theory and Carson theory to equate the ring network power supply structure under the through-power supply system to an open power supply network. This method accurately analyzes the power flow distribution when different types of high-voltage power supply lines, trains operating in multiple working conditions on the traction network, and new energy power generation units are connected to the traction network. This method facilitates the theoretical derivation of power distribution, power loss, voltage at each node, and current distribution patterns in the network, laying a theoretical foundation for the electrical characteristic analysis of complex through-power supply systems. The method includes the following steps: S1, determining the equivalent circuit of the high-voltage power supply line; S2, determining the equivalent circuit of the traction network; S3, determining the equivalent circuit of the entire through-power supply system; and S4, performing equivalent transformation of the equivalent circuit of the ring network of the through-power supply system.
Owner:SOUTHWEST JIAOTONG UNIV
Insulation connector for composite material cantilever device of overhead line 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.
Owner:SHANGHAI HIGH SPEED RAIL ELECTRICAL TECH
Hybrid CNN-LSTM overhead line system dropper fault detection system and method based on attention mechanism
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.
Owner:CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
Method, device and equipment for automatically arranging catenary support position of bridge section and storage medium
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.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP CO LTD
CT (Current Transformer) electricity taking device for 27.5 kV transmission cable of electrified railway
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.
Owner:XINGTAI SAIER ELECTRICAL TECH CO LTD +1
Overhead line system anti-galloping device
ActiveCN223252801UDevices for damping mechanical oscillationsTrolley linesComposite insulatorsContact network
The utility model discloses an anti-galloping device for an overhead line system, which relates to the technical field of railways and comprises a composite insulator, the top end of the composite insulator is rotatably connected with a mounting frame, and the mounting frame is provided with a wire clamp used for being connected with a positive feeder line of the overhead line system of an electrified railway; the connecting rod is connected to the bottom end of the composite insulator and extends along the bottom end of the composite insulator; the mounting seat is fixed on the ground or the side wall along the electrified railway, an opening for the connecting rod to penetrate through is formed in the mounting seat, and a limiting piece for limiting the connecting rod in the opening is mounted on the connecting rod. According to the utility model, the positive feeder line in the electrified railway contact network can be restrained and fixed, the galloping amplitude of the positive feeder line is limited, the positive feeder line is prevented from galloping violently, and the safe operation of a traction power supply system is ensured.
Owner:LANZHOU JIAOTONG UNIV
Device for equidistantly moving mobile contact suspension of mobile contact network
Owner:SHAANXI GAOJIA ELECTRICAL TECH
Power grid-traction network resource collaborative evaluation method and system, and electronic equipment
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.
Owner:CHINA RAILWAY ELECTRIFICATION ENGINEERING GROUP CO LTD +1
A fault location method for traction power supply system feeder breaker 1 with 2 modes
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.
Owner:NANJING SAC RAIL TRAFFIC ENG CO LTD
Intelligent overhead contact line grounding device
ActiveCN116885517BLine/current collector detailsConnection contact member materialElectrical batteryGear wheel
The application provides an intelligent overhead line system grounding device, and relates to the technical field of overhead line system maintenance tools for electrified railways.The device comprises a master and a slave of a grounding system.The master of the grounding system comprises a limiting system, a gear mounting slot connected to the limiting system, a grounding shoe, a contact resistance screw and the like.The slave of the grounding system comprises a limiting system, a grounding hook, a slave contact resistance screw and the like.The master shell and the slave shell are internally provided with a battery, a mainboard, an electromagnet, a buzzer, an indicator lamp and an antenna mounting piece and the like.Through the master and the slave of the grounding system, the operation logic of hanging and removing the grounding wire is standardized, the contact resistance is detected, and the device plays a prompting role when the operation is in violation of the rules.
Owner:SCI & TECH RES INST OF CHINA RAILWAY WUHAN BUREAU GRP CO LTD +2
Harmonic traceability method and device based on electrified railway and new energy inverter
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.
Owner:LANZHOU JIAOTONG UNIV
Uplink and downlink ground automatic neutral section passing commutation device considering standby
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.
Owner:CHENGDU SHANGHUA ELECTRIC CO LTD