407 results about "Traction power supply" patented technology

The invention relates to the technical field of power frequency resistance real-time monitoring, and provides a traction power supply 27.5 kV cable interval grounding grid power frequency resistance real-time monitoring method and system, and the method comprises the steps: obtaining the temperature distribution data of the surface of a conductor of a grounding grid; acquiring voltage and current response of the grounding grid when the local temperature rise value exceeds a preset reference value to perform frequency domain conversion, and generating a broadband impedance spectroscopy analysis result; aligning earth surface coordinates corresponding to the temperature measurement nodes with underground coordinates corresponding to the impedance measurement points, generating a space correlation grid, generating a temperature rise phase deviation coupling relation matrix, and generating a real-time monitoring result of the power frequency resistance of the grounding grid according to a power frequency impedance correction value in the space correlation grid and the temperature rise phase deviation coupling relation matrix; according to the invention, accurate space matching between the abnormal temperature rise area and the impedance change of the corresponding conductor is realized, the adaptability of a monitoring network to the extension direction and the burial depth change of the conductor is enhanced, and feature signal omission caused by fixed measurement point deployment is avoided.

The invention discloses an energy storage rapid compensation method and system based on track overhead line system voltage fluctuation feature recognition, and relates to the technical field of track traffic traction power supply. The method comprises the following steps: synchronously acquiring voltage and current signals of the overhead line system, and extracting a composite feature vector containing disturbance root attributes and transient change rate; on the basis of the vector, a transient energy vacancy sequence covering the ultra-short-term future is output in real time through a prediction model fusing dynamic phasor analysis and a feedforward neural network; according to the sequence, a cooperative control strategy fusing overshoot and active damping is generated in combination with a proximity compensation principle and a voltage recovery state so as to drive an along-line energy storage unit; the strategy is executed in advance, compensation energy is injected, and finally double closed-loop correction is conducted based on the voltage residual error. According to the method, the problems of response lag, unclear disturbance identification, poor collaboration and lack of adaptive ability in the prior art are solved, and advanced, accurate, collaborative and self-optimized rapid suppression of the voltage fluctuation of the overhead line system is realized.

The invention discloses a simulation method of a full-system coupled railway traction power supply system, which comprises the following steps: taking a traction power supply system and a train group as integrated simulation objects, and respectively constructing traction power supply network models including equivalent models of traction transformer, traction network, AT station and public power grid parameters; a multi-train operation simulator is constructed, and the multi-train operation simulator comprises various parameters such as trains, lines, signal systems, operation organizations and the like. Traversing all on-line trains through a multi-train operation simulator, substituting the on-line trains into a traction power supply network model, and dynamically calculating operation parameters and traction loads of a train group, including calculating locomotive initial current according to train initialization voltage, solving a traction power supply network node voltage equation and updating locomotive terminal voltage; and correcting the traction and braking characteristics of the train based on the updated locomotive terminal voltage. The method overcomes the defects of a traditional calculation method using a traction power supply system as an isolated network, reveals the dynamic state of train operation and the distribution characteristics of the traction network, and finally can obtain various parameters of each train.

The invention relates to the technical field of carbon emission metering of a high-speed railway tractive power supply system, in particular to a carbon emission metering method and system of a high-speed railway tractive power supply system based on a dynamic carbon emission factor, and is particularly suitable for carbon emission metering of the tractive power supply system under the access condition of new energy such as wind, light and the like. The invention discloses a carbon emission metering method of a high-speed railway traction power supply system based on a dynamic carbon emission factor. The carbon emission metering method comprises a carbon metering accounting boundary and an indirect carbon emission metering method. A dynamic carbon emission factor-based carbon emission metering system for a traction power supply system of a high-speed railway is characterized by comprising a data acquisition module, a dynamic carbon emission factor calculation module, a carbon emission metering module and a sensitivity analysis module. According to the accounting method for the indirect carbon emission of the traction power supply system, the source of the carbon emission of the traction power supply system can be revealed, and a scientific and accurate theoretical basis is provided for carbon metering in the railway industry.

The invention relates to the technical field of carbon emission metering of a high-speed railway tractive power supply system, in particular to a carbon emission metering method and system of a high-speed railway tractive power supply system based on a dynamic carbon emission factor, and is particularly suitable for carbon emission metering of the tractive power supply system under the access condition of new energy such as wind, light and the like. The invention discloses a carbon emission metering method of a high-speed railway traction power supply system based on a dynamic carbon emission factor. The carbon emission metering method comprises a carbon metering accounting boundary and an indirect carbon emission metering method. A dynamic carbon emission factor-based carbon emission metering system for a traction power supply system of a high-speed railway is characterized by comprising a data acquisition module, a dynamic carbon emission factor calculation module, a carbon emission metering module and a sensitivity analysis module. According to the accounting method for the indirect carbon emission of the traction power supply system, the source of the carbon emission of the traction power supply system can be revealed, and a scientific and accurate theoretical basis is provided for carbon metering in the railway industry.

The invention provides a flywheel energy storage optimal configuration method for regenerative braking energy recovery of urban rail transit, which comprises the following steps of: S1, modeling a traction power supply system according to a fixed energy-saving traction strategy, and constructing a load flow calculation model of a direct-current traction power supply system of a whole line; s2, under the condition that a flywheel energy storage unit is added, a flywheel energy storage economical model is constructed; and S3, on the basis of the flywheel energy storage economic model, solving the load flow calculation model to obtain a configuration scheme of the flywheel energy storage unit. According to the method, the economic model of flywheel energy storage is constructed, optimization solution is performed in combination with the load flow calculation model, the optimal energy storage configuration scheme can be determined, and on the premise that the performance requirement of the system is met, the investment and operation cost is minimized, and the overall economic benefit of the project is improved.

The invention provides a node PV curve generation method of a bilateral traction power supply system, and relates to the technical field of power system stability analysis. The method comprises the following steps: establishing a power flow equation of the bilateral traction power supply system based on power flow coupling characteristics between a power grid side and a traction grid side of the bilateral traction power supply system; and performing parameterization on the power flow equation based on a local parameterization method to obtain an expanded power flow equation, determining a target node in the plurality of nodes, and determining a PV curve of the target node by using a continuous power flow method based on the expanded power flow equation. By establishing the power flow equation of the bilateral traction power supply system and performing continuous power flow calculation on the expanded power flow equation, the PV curve of the target node can be determined, and a basis can be provided for static voltage stability analysis of the bilateral traction power supply system.

The invention discloses a source load impact and system bearing life evaluation method and system, equipment and a medium, and relates to the technical field of traction power supply, and the method comprises the steps: collecting data to recognize impact, building a source load model, analyzing an impact diffusion path, evaluating system bearing, fusing multi-dimensional damage, calculating the residual life of the equipment, and automatically updating parameters. And generating a closed-loop regulation and control strategy. The system comprises a data analysis and dynamic modeling module, a bearing evaluation and conduction analysis module, a damage coupling and life prediction module and a parameter correction and strategy generation module. The traction impact time domain-frequency domain-topology integrated quantization is realized, and the problem of impact time-space diffusion assessment is solved. A life model is constructed, and multi-dimensional stress damage is accurately mapped. The micro-simulation and on-line filtering technology is utilized to ensure that model parameters are adaptively updated along with working conditions, and the problem of disjunction between evaluation and actual conditions is solved. The method supports side cloud cooperation and closed-loop pre-control, effectively improves the safety margin of the power grid, and delays the aging of equipment.

The invention discloses a distributed cooperative voltage control method for a hybrid flexible traction substation group, and aims at solving the problems of output voltage cooperation, no-load circulating current suppression and multi-substation load distribution during networking operation of a plurality of hybrid flexible traction substations (HFTSS). Rapid synchronization of output voltage phases of the substations is achieved by introducing an average consistency algorithm, and nearby distribution of train loads among the traction substations is achieved by combining self-adaptive virtual impedance. According to the method, the capacity of the hybrid flexible traction substation for coping with the dynamic change of the external power grid voltage phase can be effectively enhanced, the loss of a contact network is reduced, the regenerative braking energy utilization efficiency is improved, and a feasible path is provided for large-scale application of a low-cost hybrid flexible traction power supply system and improvement of a cooperative control technology system.

The invention discloses a multi-port stability analysis method for a photovoltaic access traction power supply system, and belongs to the field of traction power supply systems. The method comprises the following steps: dividing the photovoltaic access traction power supply system into an active subsystem and a passive subsystem; respectively establishing an AC / DC hybrid admittance model of the active subsystem and an AC / DC hybrid impedance model of the passive subsystem; according to the AC / DC mixed admittance model of the active subsystem and the AC / DC mixed impedance model of the passive subsystem, an impedance return difference matrix is obtained based on the closed loop transfer function of the input voltage and the output current of the photovoltaic access traction power supply system; the impedance return difference matrix is converted into an upper triangular matrix according to a triangularization method, an impedance return difference matrix determinant is obtained, and a Bode diagram curve of the impedance return difference matrix determinant is obtained; and completing the stability analysis of the photovoltaic access traction power supply system according to the phase change of the Bode diagram curve. According to the method, the problem that the analysis of the influence of photovoltaic integration on the system stability is not comprehensive in the existing method is solved.

The invention relates to an electrified railway traction power supply system which is low in investment, is smooth for obtaining a current and is convenient to maintain. Rail webs outside two steel rails of a rail are respectively provided with one insulating strip; then a power supply strip is respectively arranged outside each insulating strip; each vibration inductive switch is connected in series with a sound inductive switch and a light-operated inductive switch; one ends of the connected switches are connected to the power supply strips at one sides; the other ends of the connected switches are connected with feed lines; the power supply strips at the other sides are connected with return wires. Power receiving frames at a headstock side and a tailstock side of a train are in contact with the power supply strips; when the train passes through a zone, the vibration inductive switches are closed, the sound inductive switches are closed, the light-operated inductive switches are closed, the power supply strips in the zone supply power, the power receiving frames of the train obtain a current and the train runs; when the train runs into a next power supply zone, the next power supply section is powered on, and power supply is stopped in the power supply zone. The aims of low investment, smoothness for obtaining the current and convenience for maintenance are fulfilled.

The method is applied to the fields of train regenerative braking energy utilization, stray current and rail potential treatment and the like in electrified rail transit, especially urban rail transit. The invention provides a direct-current traction power supply system capable of reducing the energy storage capacity of a super capacitor of urban rail transit, which is combined with a super capacitor energy storage device of the urban rail transit and supplies power to a power electronic device for treating stray current and rail potential by utilizing regenerative braking energy of a train. The super-capacitor energy storage device has the following advantages that on one hand, the energy storage capacity of the super-capacitor bank in the super-capacitor energy storage device between train braking and traction can be reduced, and the utilization efficiency of regenerative braking energy stored by the super-capacitor bank is improved; on the other hand, the problems of stray current, rail potential and the like in the system can be solved from the source, and the power supply distance of a traction substation is remarkably increased. Therefore, the direct-current traction power supply system is of great significance to green and safe operation of urban rail transit.

The invention discloses an urban rail energy consumption scheduling method based on artificial intelligence multi-objective optimization, and the method comprises the steps: effectively solving a problem of scheduling decision limitation caused by a single optimization objective in the prior art through comprehensive real-time data processing, multi-objective collaborative optimization and intelligent algorithm iteration solution; the optimal control of the overall operation energy consumption of the rail transit system is realized; the train operation energy efficiency, the regenerated energy utilization rate and the operation punctuality rate are effectively improved, meanwhile, the peak load of a traction power supply system is reduced, the overall energy utilization efficiency and the operation performance of rail transit are remarkably improved, and the dual purposes of energy conservation, consumption reduction and efficient operation of the system are achieved.

The invention discloses a traction power supply system voltage mutual fuse monitoring method, system and device, relates to the technical field of traction power supply systems, and solves the problems that the existing traction power supply integrated automation system cannot monitor the continuous fusing process of a fuse, resulting in that the PT voltage is lower than the actual operation voltage, and the safety is poor. According to the technical scheme, the method is characterized in that according to the power supply characteristics of a traction substation, the operation condition of a voltage transformer of the substation is automatically recognized, and a fuse monitoring method of the voltage transformer is automatically selected according to the operation condition of the voltage transformer; and monitoring and early warning of incomplete fusing of the voltage transformer fuse are realized.

The invention provides a configuration method for reconstructing a self-healing function of a traction power supply system, which adopts a hierarchical and hierarchical configuration mode, expands a mode flow step by step by a configuration tool according to an optional power supply network configuration scheme, intelligently selects an applicable action flow according to the current network condition during engineering application, and improves the self-healing function of the traction power supply system. The configuration of reconstructing the self-healing function is simply and quickly completed. According to the method, all action steps involved in the reconstruction self-healing process are switched, and meanwhile, switch attributes such as switch types, action time and synchronous actions are set for each switch, so that the reconstruction self-healing function can be completed more accurately, effectively and quickly. According to the method, real-time reconstruction self-healing process confirmation and modification can be provided, under the condition that a device is not restarted, the mode process is modified through a real-time human-computer interaction interface, the modified and confirmed reconstruction self-healing mode process is sent to a dispatching end for confirmation, and various unexpected field conditions can be flexibly coped with.

The invention discloses an energy dynamic prediction distribution method and system for railway power supply safety. Monitoring regenerative braking energy, a traction load state, a residual electric quantity state of an energy storage device and a power grid electricity price state in the railway traction power supply system in real time; constructing a cost function taking power supply safety as a core; establishing a dynamic coupling prediction data model including a traction load, a residual electric quantity state of an energy storage device and a power grid electricity price, and designing a dynamic prediction algorithm considering an energy distribution priority; based on a dynamic prediction algorithm, a distribution coefficient among the bidirectional energy fusion device, the energy storage device and the grid-connected energy feedback device is corrected in a rolling manner; based on the distribution coefficient, an energy distribution path is selected, and dynamic prediction distribution of regenerative braking energy in the railway traction power supply system is completed; according to the method and system provided by the invention, regenerative braking energy can be optimally utilized, and the energy utilization efficiency of the power supply system is remarkably improved.

The invention discloses a network fault flexible reconstruction control method and system for a through traction power supply system, and the method comprises the steps: achieving the physical comprehension of a fault traction station and a traction network, and constructing a local fault isolation region based on the disconnection operation of a control electric split phase when an output or input port of a two-phase-single-phase conversion unit breaks down; the power supply system realizes self-adaptive reconstruction of a power supply path of the fault traction station through switching of a control strategy or adjustment of a power instruction, and local island operation of the traction network is completed; after the fault port is repaired, the power supply system further executes a fault recovery process, and finally, a system operation structure is recovered to a conventional mode before the fault; the system comprises a fault judgment module, an output port fault adjustment module and an input port fault adjustment module, and is used for realizing the method.

The invention discloses a two-phase input coordination control method and system for a hybrid through traction power supply device. The method comprises the following steps: acquiring alternating-current side voltage and current and direct-current side voltage of each group of two-phase input ports in the device in real time; obtaining an active reference instruction of each output port according to the DC side voltage; performing single-phase dq conversion based on a virtual axis according to the alternating current side voltage and current to obtain dq axis current components of each group of two-phase input ports; obtaining active and reactive current reference instructions of each group of two-phase input ports according to the active reference instruction and a first condition; pWM modulation is carried out according to the dq-axis current component and the active and reactive current reference instruction, and PWM instructions of each group of two-phase input ports are obtained; and continuously obtaining a PWM instruction and driving the device according to the PWM instruction.

The invention relates to a converter grid-connected current harmonic suppression method and device for a traction power supply system, and is applied to the technical field of rail transit traction power supply. The method comprises the following steps: acquiring traction power supply electrical parameter information and grid-connected output current information of each slave controller in a grid-connected converter; determining a grid-connected reference current according to the traction power supply electrical parameter information; and based on the grid-connected reference current, performing harmonic suppression and phase lead compensation on the grid-connected output current information by utilizing closed-loop control of multiple quasi-proportional resonance based on multiple phase lead compensation, and determining the current grid-connected output current. Through multiple quasi-proportional resonance control, the harmonic content of steady-state current output by the grid-connected converter can be suppressed; and in order to avoid control time delay caused by multiple quasi-proportional resonance control, the phase is subjected to lead compensation, so that the obtained current grid-connected output current meets the response speed requirement, and the electric energy quality of the grid-connected current is improved. Therefore, the operation stability of the traction power supply system can be improved.

A traction power supply system of an electric or hybrid transportation vehicle having a high-voltage side and a low-voltage side, wherein at least one electrical machine, an inverter and a high-voltage battery are arranged on the high-voltage side, wherein the high-voltage side is connected to the low-voltage side via at least one DC-DC converter, wherein the high-voltage battery is assigned at least one switching element, wherein the traction power supply system has at least one control device which controls the switching element, wherein the at least one switching element is arranged in at least one connection line between the high-voltage battery and the inverter, wherein the high-voltage battery is connected to the DC-DC converter via at least one further connection line. Also disclosed is a method for controlling a traction power supply system.

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.

The application discloses a kind of based on distributed control's rail transit traction power supply optimization method, comprising: obtaining environmental parameter and correcting insulation and carrying capacity, obtain correction result;According to main substation, section, catenary section and backflow node position constructs distributed control unit and graph structure;The correction result, traction load and graph structure are input into graph attention network, and output voltage, temperature rise and insulation risk;Based on prediction and constraint, execute power supply system evaluation, generate power supply topology;Power supply topology is issued to distributed control unit, and local control parameter is generated;Distributed control unit communication cooperates to generate consistent control parameter;According to consistent control parameter, section switch, power supply arm switching and backflow path adjustment are executed.The application realizes the accurate prediction and collaborative control of traction power supply system, improves power supply stability and operation safety, has the advantages of high power safety, strong power supply reliability.

The invention relates to an urban rail transit flexible direct current traction power supply method based on an energy router. The method comprises the following steps: constructing each structured energy intention corresponding to a train control terminal according to train running state data corresponding to the train control terminal; respectively analyzing space-time information in each structured energy intention to obtain an intention perception map corresponding to the train control terminal; performing energy efficiency analysis on each lattice point in the intention perception map to obtain a lattice point efficiency analysis structure data set; analyzing the power supply behavior of each train corresponding to the train control terminal according to the lattice point efficiency analysis structure data set to obtain power supply behavior execution data corresponding to each train; the power supply behavior execution data is used for carrying out flexible direct-current traction power supply on the train. By adopting the method, the sensing precision and the regulation and control capability of the power supply behavior of the train can be effectively improved.

The invention discloses a harmonic suppression method and system of a rail transit electric traction system. The system comprises a traction unit harmonic response acquisition module, a traction group construction and intra-group influence analysis module, a traction group collaborative behavior analysis module, a collaborative suppression strategy generation module and a suppression resource regulation and control module. The method comprises the following steps: dividing a plurality of traction units on the same train into traction groups, analyzing harmonic response information of the traction units on a traction group level to generate comprehensive harmonic influence characteristics, analyzing action results of the plurality of traction groups on a traction power supply section level, and judging whether a harmonic collaborative amplification or collaborative instability trend exists or not; and thus, a collaborative harmonic suppression strategy for the traction group or the traction unit is generated. Through differential regulation and control on harmonic suppression resources and in combination with feedback correction, dynamic adjustment of a harmonic suppression process is realized, and pertinence of harmonic suppression under a complex operation condition and operation stability of a traction power supply system are 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.

The multipurpose unmanned aerial vehicle comprises a transmission unmanned aerial vehicle body, floating blocks are fixedly connected to the two sides of the bottom of the transmission unmanned aerial vehicle body, a storage battery is fixedly installed on one side of each floating block, a pesticide storage box is fixedly installed on the surface of a supporting plate, and a booster pump is fixedly installed on the top of the pesticide storage box. A connecting pipe is rotatably installed at a water outlet of the booster pump, a spraying head is rotatably installed at the top of the transmission unmanned aerial vehicle, a cleaning unmanned aerial vehicle is fixedly connected to the tail end of the traction power line, a first transmission motor is fixedly installed at the bottom of the positioning rod, and a cutting blade is fixedly connected to a transmission shaft of the first transmission motor. The cleaning unmanned aerial vehicle has the advantages that algicide in the pesticide storage box is automatically sprayed to the water surface through the booster pump in the transmission unmanned aerial vehicle, pesticide cleaning of algae on the water surface is achieved, the cleaning unmanned aerial vehicle moves in the water, the algae in the water body are cut and cleaned through the cutting blades, manpower is saved, and meanwhile the cleaning efficiency is improved. And the cleaning efficiency of the algae in the water environment is greatly improved.

The invention provides an urban rail transit traction power supply flywheel energy storage and medium-voltage energy feedback collaborative optimization configuration method, and the method comprises the steps: introducing a flywheel energy storage unit FESE and an inversion energy feedback unit IEFE into an urban rail transit power supply system at the same time, and constructing an urban rail transit AC-DC hybrid power flow analysis model; taking the daily total cost and the static recovery period as targets to construct a comprehensive cost index; the number of FESEs and the number of IEFEs are used as discrete variables, a charging voltage threshold value and a discharging voltage threshold value of the FESEs and an action voltage threshold value of an inversion energy feedback unit are used as continuous variables, a hierarchical swarm intelligent optimization method is adopted, the purpose of minimizing a comprehensive cost index is taken as a target, and on the premise that the operation constraint of a power supply system is met, the power supply system is optimized. And outputting a collaborative optimization configuration scheme including the FESE number, the IEFE number and the sum of the FESE number and the IEFE number of the traction substations.

The invention discloses an intelligent traction power supply system power adjusting method and system. Comprising the following steps: calculating real-time transfer power, and calculating compensation current in real time by combining a power transfer error and negative sequence current; calculating a current tracking value based on the current inner loop instruction value and the voltage synchronization signal; designing a feedforward-feedback composite controller, and respectively calculating a feedforward compensation quantity and a feedback control quantity; based on the feedback control quantity and the feedforward compensation quantity, the total duty ratio of the PWM modulation signal is calculated, and a railway power regulator is driven to output an actual current value; the control method and system provided by the invention are low in engineering implementation cost, adaptive to the RPC application scene of the traction substation, and easy to popularize.

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.

The present invention discloses a method, device, and medium for locating grounding faults in bilateral, fully parallel AT catenary systems. The method comprises the following steps: after a fault occurs, collecting the catenary voltage phasors at the beginning and end of each AT segment; determining the faulty AT segment based on the voltage phasors at the beginning and end of the AT segment; collecting the voltage phasors and distance data for the faulty AT segment; and determining the fault point based on the voltage phasors and distance data for the faulty AT segment. This embodiment improves fault location accuracy by measuring only the voltages on both sides of the AT segment, eliminating the need for current measurement, and thus addresses the problem of locating grounding faults in the catenary system of bilateral traction power supply systems.