502 results about "Traction power supply" patented technology

The invention provides a real-time dynamic harmonic detection method and system for a traction power supply system, and relates to the technical field of harmonic detection, and the detection method comprises the following steps: collecting a voltage signal of the traction power supply system in real time, and dynamically tracking fundamental frequency fluctuation through a phase-locked loop technology; dynamically adjusting the data window length of FFT analysis; dynamically adjusting a frequency spectrum calculation kernel of the FFT; carrying out linear compensation on the detected harmonic phase; taking the preliminarily detected harmonic parameter as an initial value, and iteratively updating the harmonic parameter until convergence by minimizing a signal reconstruction error; dynamically adjusting a sampling interval according to the fundamental frequency fluctuation, and carrying out anti-aliasing processing by adopting a filter with a variable cut-off frequency; and constructing a matrix model containing a fundamental frequency fluctuation parameter, and calculating a real harmonic parameter through a least square method. According to the method, the detection defect of the fixed window FFT during frequency fluctuation can be systematically solved, and high-reliability real-time data support is provided for harmonic resonance suppression of the electrified railway.

The invention discloses a traction energy-saving method and system based on dynamic load flow calculation for rail transit, electronic equipment and a readable storage medium, and the traction energy-saving method comprises the steps: planning a multi-vehicle collaborative energy-saving module through an ATO single-vehicle energy-saving + ATS working diagram, a dynamic diagram adjustment module according to passenger flow requirements, a regenerative braking energy feedback module and other modules; multi-dimensional coupling conditions of power supply, vehicles, signals, tracks and the like are dynamically analyzed, dynamic load flow calculation is performed from the perspective of energy flow through a dynamic load flow calculation and analysis module of the traction power supply system, technical means such as ATO energy saving, ATS energy saving and regenerative braking energy recovery device energy saving are dynamically coordinated, unified management and cooperative linkage are performed, and the dynamic load flow calculation and analysis module of the traction power supply system is realized. Energy consumption monitoring and statistical analysis are carried out for different traction energy-saving measures, and long-term energy-saving operation effect tracking and evaluation are carried out; and an energy-saving control strategy is continuously adjusted and optimized according to an analysis result through a prediction model between line energy consumption and operation data variables, so that a better energy-saving effect in a real sense is achieved.

The invention discloses a traveling wave fault positioning method and system for a full parallel AT power supply traction network, and belongs to the field of railway traction power supply system relay protection. The method specifically comprises the following steps: after the full parallel AT power supply traction network has a fault, firstly, analyzing the characteristics of an AT station fault initial current traveling wave, and determining a fault line by using the amplitude of the AT station fault initial current traveling wave; then, the polarity of the fault initial current traveling wave and the fault initial voltage traveling wave of the AT station fault line is used for judging the fault direction; and finally, calculating the fault distance by selecting a positive direction or negative direction distance measurement formula according to the moment when the fault initial voltage traveling wave arrives at the outlet of the traction substation, the AT station and the subarea station and the fault direction information. According to the method, only fault initial traveling wave information is utilized, wave head identification is not needed, wave velocity parameters are not needed, and simulation results show that the positioning method not only can provide fault distance, but also can provide fault line information, is convenient for maintainers to quickly find fault points, and has extremely high robustness and accuracy.

The invention relates to a train scheduling and passenger flow guiding collaborative optimization method and device, and the method comprises the steps: obtaining the first passenger flow information of a road network in a preset time period, the road network comprises a plurality of lines, each line is provided with a plurality of stations, and the first passenger flow information indicates the number of passengers taking from a departure station to a destination station; the departure station and the destination station are respectively any one station in the road network; the first passenger flow information is input into an optimization model for train dispatching and passenger flow guiding collaborative optimization, an optimization result is obtained, and the optimization model is determined through optimization target training based on the minimum power supply energy consumption and the minimum passenger waiting time; the optimization result indicates train scheduling information and passenger flow guiding information on each line in the optimized road network. According to the train scheduling and passenger flow guiding collaborative optimization method and device provided by the embodiment of the invention, the energy consumption of a traction power supply system can be effectively reduced, and the average waiting time of passengers is shortened, so that the energy efficiency of urban rail transit is improved, and the service quality is improved.

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 provides a traction power supply system control method based on multi-objective optimization, and the method comprises the following steps: S1, determining an initial control variable of a traction system, the initial control variable comprising converter power of an alpha power supply side and a beta power supply side of the traction power supply system and train braking resistor dissipation power of the alpha power supply side, the initial control variable is used as input to construct a regenerative braking energy MPC prediction model; s2, predicting a state variable of a next moment based on a regenerative braking energy MPC prediction model, wherein the state variable comprises output power of a traction substation, total dissipation power of a brake resistor, output power of an energy storage system and a charge state of the energy storage system; and S3, constructing a multi-objective optimization function based on the state variable at the next moment, converting the multi-objective optimization function into a quadratic programming form for solving to obtain a control variable sequence, and taking a first item of the control variable sequence as control input to control the traction power supply system to work.

The invention provides a simulation calculation method of an urban rail transit traction power supply system, which comprises the following steps of: constructing a locomotive load model, establishing a locomotive running state information table with a unified time section, and combining the position of a locomotive with the position of a traction station in a line to obtain topological structure analysis of different time sections; constructing a traction power supply system model, and obtaining rated voltage, line length, line unit impedance and traction position; simulating that a plurality of locomotives start from a vehicle depot and run from the head end of a line to the tail end of the line, obtaining power and position values of the locomotives according to a locomotive load model, substituting the power and position values into a traction power supply system model to complete load flow calculation of a direct-current traction network, and obtaining current and voltage of the locomotives and bus voltage and feeder current values of a traction station; according to the invention, the power of the train in different operation states can be simulated, and the bus voltage and feeder current of each traction station of the traction power supply system can be calculated.

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.

Provided is a traction power supply system for rail transit, specifically a power unit for rail transit, and a control method. Distinguished from the architecture of a conventional traction power supply system for rail transit, a modularization-based power unit main circuit and a control method therefor are provided. The power unit main circuit comprises a high-voltage switch module, high-voltage modules, high-frequency transformers, low-voltage modules and an intermediate direct-current module. On the basis of a modular design concept, electrical isolation between high and low voltages and level conversion are implemented, thereby effectively reducing the difficulty in insulation design of a system and also improving the degree of redundancy and maintainability of the system. Furthermore, with regard to the phenomenon of voltage unbalance of multiple cascaded modules caused by differences in device parameters, a voltage equalization start logic and a control method are provided to effectively resolve the phenomenon of voltage unbalance between the cascaded modules, thereby reducing the impact of starting currents and improving the reliability of the system.

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 an IGDT-based traction power supply system day-ahead robust optimization scheduling method, and belongs to the field of power system optimization scheduling, and the method comprises the steps: taking the minimum daily comprehensive operation cost of a traction power supply system as a target, and building a deterministic day-ahead optimization operation model of a given photovoltaic output and traction load prediction value; based on the deterministic day-ahead optimization operation model, introducing an IGDT information gap decision theory, and establishing an IGDT robust optimization operation model for day-ahead operation of the traction power supply system, which considers scheduling decision, uncertainty set selection and operation cost control at the same time; and solving the IGDT robust optimization operation model to obtain a traction power supply system day-ahead robust optimization scheduling strategy. According to the method, the potential risk caused by relatively strong volatility and uncertainty of photovoltaic output and traction load is solved.

The invention discloses a multi-user management system based on a communication management machine in the field of railway traction power supply systems. The multi-user management system comprises a user information management module which divides management machine users into root users, system users and common users; the user switching module is responsible for switching a running user of the process from a root user to a system user or a common user; the permission group setting module is used for adding the process into a corresponding permission group according to a current running user of the process; the user and the permission group are in a one-to-many relationship, and one process can join a plurality of permission groups; the root directory setting module is used for resetting the root directory after the user logs in when the user logs in the shell terminal, so that the root directory is different from the root directory during initialization starting; according to the invention, not only can the authority level problem caused by remote access to the communication management machine in the railway power supply monitoring system be effectively solved, but also the security risk prevention capability of the comprehensive automation system in the substation is greatly enhanced.

The invention discloses a RPC traction power supply harmonic suppression method based on robust H-infinity control, and relates to the technical field of high-speed railway electric power, and the method comprises the steps: analyzing the electric energy quality of a railway traction power supply system; constructing a vehicle-network coupled traction power supply system module engineering model; building a quadruple RPC model based on robust H infinity control; and constructing a locomotive simulation model and designing a six-working-condition parallel APF model to carry out electric energy quality analysis. According to the RPC traction power supply harmonic suppression method based on robust H-infinity control provided by the invention, harmonic suppression is carried out on the traction network by applying the RPC based on robust H-infinity control, so that the operation safety of the electrified railway is promoted to be improved, and a real solution is provided for further enhancing the reliable operation of the electrified railway traction power supply system.

The invention discloses a traction power supply simulation system and simulation method for an urban rail vehicle, and relates to the technical field of urban rail transit. Comprising an operation parameter acquisition module used for acquiring urban rail vehicle characteristic parameters and operation state parameters; the hindering instantaneous power calculation module is used for calculating and representing a wind direction resistance coefficient and a rolling resistance coefficient and correcting the rolling resistance coefficient through environment humidity so as to calculate rolling resistance and air resistance; the comprehensive energy consumption analysis module is used for calculating the instantaneous power of the vehicle and the operation energy consumption of the railway vehicle; the transformer substation loss characterization module is used for calculating line loss and load loss of the transformer substation according to the comprehensive energy consumption of the railway vehicle; and the power transmission network consumption summarization module is used for obtaining power transmission network consumption. The rolling resistance and the air resistance of the vehicle can be effectively calculated, so that the instantaneous power and the operation energy consumption of the vehicle can be accurately calculated, and a foundation is laid for further reducing the energy consumption of a rail transit system.

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 relates to a medium-low speed maglev traffic energy fusion system architecture. The system architecture comprises a medium-low speed maglev traction power supply system, a renewable energy power generation system, a hybrid energy storage system, a maglev train, an energy integrated management scheduling system and a maglev traffic and carbon market collaborative architecture. Compared with the prior art, the method has the advantages that rich renewable energy sources along the medium-low speed maglev traffic system are effectively utilized, the power supply reliability of the medium-low speed maglev train system is improved, the energy use efficiency of the system is improved and the like, and fusion of the maglev traffic system and the energy system is realized.

The invention discloses a comprehensive energy-saving method and system for automatic driving of a high-speed train, and belongs to the field of energy-saving operation control of the high-speed train. Train state information, line data information and traction power supply characteristic information can be fused, an optimal working condition sequence is automatically generated by an automatic driving system, and traction energy consumption minimization is achieved; meanwhile, a high-speed train regenerative braking energy dynamic distribution method is constructed, vehicle-mounted energy storage and trackside energy storage of regenerative braking energy and dynamic distribution of traction utilization of trains close to a power supply area can be achieved according to the real-time state of the train, the real-time state of trackside equipment and the real-time state of a traction power supply system, dissipation of the regenerative braking energy is reduced to the maximum extent, and the energy utilization rate is increased. And the utilization of regenerative braking energy is maximized.

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.