606 results about "Distributed power" patented technology

The invention discloses an island micro-grid operation scheduling method and device. According to the scheme, the method comprises the steps that power generation characteristic modeling is conducted on a distributed power source and an energy storage system of a diesel storage island micro-grid; constructing a function taking the minimum daily total operation cost as a target, wherein the function covers the operation cost of a diesel generator and an energy storage system and the pollutant treatment cost; establishing a power impact type load mathematical model including power characteristics, system dynamic frequency response characteristics, micro-grid dynamic frequency safety constraints and diesel generator frequency control constraints; establishing a micro-grid operation constraint model which has constraints such as power balance, Distflow power flow, energy storage, charging, discharging and capacity, diesel generator output and climbing rate; and solving the model by using a particle swarm optimization algorithm, generating a diesel generator output, energy storage system charging and discharging and frequency modulation reserve capacity distribution strategy, and obtaining an island microgrid optimal operation scheduling decision.

The invention relates to the technical field of micro-grid control, and discloses an AC / DC micro-grid layered distributed control method and system, and the method comprises the steps: obtaining a DC voltage outputted by a distributed power supply in a DC micro-grid and an AC frequency outputted by a distributed power supply in an AC micro-grid, and carrying out the normalization processing; according to the voltage normalization value and the frequency normalization value, a finite time consistency algorithm is adopted to calculate a primary active power reference value of the interconnected converter; compensating the primary active power reference value according to a distributed secondary controller to obtain a secondary active power reference value; and generating a control signal of each interconnected converter according to the secondary active power reference value. Through hierarchical distributed control, the purposes that the total power sent by the direct current micro-grid and the alternating current micro-grid is proportionally distributed according to respective rated capacities and the active power transmitted by all the interconnected converters is proportionally distributed according to the transmission capacities are achieved, and the operation safety and stability of the alternating current and direct current micro-grid are effectively improved.

The invention relates to the technical field of inverter control, and discloses a VSG-based inverter phase-locked loop-free pre-synchronization method, system and device and a medium, and the method comprises the steps: eliminating the voltage deviation between the VSG inverter voltage of a virtual synchronous generator and the output voltage of a micro-grid through a deviation integral feedback method; a general signal delay superposition operator is adopted to filter the power grid voltage so as to construct virtual power, then the virtual power is introduced into an active-frequency loop of the virtual synchronous generator as a feedback signal, and a power angle feedback control model is formed so as to adjust the VSG inverter voltage; and detecting the voltage deviation between the power grid voltage and the adjusted VSG inverter voltage in real time, and when it is judged that the voltage deviation is smaller than a deviation threshold value, generating a grid-connected connection point switching-on instruction and controlling a switch of a grid-connected connection point to be switched on, so that phase-locked loop-free pre-synchronization of the distributed power supply inverter is realized, the grid-connected stability of the distributed power supply inverter is enhanced, and the grid-connected stability of the distributed power supply inverter is improved. And the current and voltage impact of the grid-connected instant system is reduced.

The invention discloses a power distribution network power supply recovery method and system considering multi-type distributed power supply cooperation, and the method comprises the steps: enabling a fault section to be successfully isolated, and carrying out the non-voltage switching-on of a network-following type DG in an intertripping power-losing region; constructing a source-load balance island based on the network construction type DG, and preferentially recovering an important load; when there is no contact, the upstream switch of the fault point carries out non-voltage reclosing to process an instantaneous fault, and island grid connection is planned; when connection exists, an optimal connection switch is optimized according to the capacity of a connection line and the capacity of a power-losing load, closing is carried out after an unrecoverable section is cut off, and staged power restoration is achieved by circularly cutting off the unrecoverable load, grid connection of the grid-following type DG and updating the recoverable capacity by considering the capacity of the adjacent grid-following type DG. And when an island adjacent section is recovered, the connected switches are subjected to synchronization grid connection. According to the invention, through a multi-type DG cooperative control strategy, the maximum capacity safety recovery of a non-fault section load is realized, the active support capability of the DG is fully exerted, and the reliability of the power distribution system is remarkably improved.

The invention relates to a charging pile AC / DC power dynamic cooperative regulation and control system, which belongs to the technical field of charging piles and comprises a power grid parameter acquisition module, a charging load characteristic analysis module, a coupling effect calculation module, a power distribution optimization module and a cooperative control execution module. The system can accurately distribute power to vehicles which really need and can be efficiently utilized, mutual interference between modules can be effectively restrained, power oscillation and cascading failures are avoided, the stability and reliability of the whole charging station under high-density operation are guaranteed, the robustness of the system is enhanced, and the service life of the charging station is prolonged. A dynamic and globally optimal balance point is found and maintained among three mutually restricted targets, namely, power deviation, coupling power and power grid constraint, by establishing and solving a multi-target optimization model containing power deviation, coupling power and power grid constraint, the stability of the multi-target optimization model is guaranteed, and the power grid safety is maintained, which cannot be achieved by any single-target or static-weight control strategy.

The invention provides a three-phase imbalance treatment method, device, system, equipment, medium and product, an operation optimization model is adopted, the operation optimization model relates to commutation soft switching constraints and reactive compensation constraints, and a solution for indicating actions of a reactive compensation device and a commutation soft switching is calculated by minimizing an objective function of the operation optimization model. Therefore, three-phase imbalance treatment is carried out through cooperation of the reactive power compensation device and the phase-change soft switch. Due to the addition of the commutation soft switch, the three-phase imbalance treatment response speed is greatly increased; based on the algorithm processing, the topology and commutation soft switch replaces a traditional interconnection switch to be connected between the two transformer areas of the power distribution network, so that interconnection and mutual assistance between the transformer areas can be considered in three-phase imbalance treatment; moreover, the key voltage treatment target of voltage deviation is considered in the operation optimization model, so that the voltage of the power distribution network does not exceed the allowable range of the national standard in a high-permeability distributed power supply scene.

The invention discloses a topology simulation analysis method and system for a low-voltage power distribution area, and belongs to the technical field of power systems and energy, and the method comprises the steps: extracting a multi-scale feature matrix through wavelet transform processing by using real-time electrical data and distributed power output data of the low-voltage power distribution area, and obtaining a feature vector after dimension reduction; combining the dimensionality-reduced feature vector with the topological structure of the low-voltage distribution area, and generating a dynamic topological relation graph through graph convolutional network processing; calculating to obtain a dynamic impedance matrix through adaptive Kalman filtering processing; analyzing and processing through the fault tree, and determining a fault propagation path and a key fault node; and through Markov decision process modeling, a state space, an action space and a reward function are obtained, and an optimized topological structure and an optimized control strategy are generated. The method has the beneficial effect that the accuracy, timeliness and practicability of topology simulation analysis of the low-voltage distribution area are remarkably improved.

The invention discloses a voltage sag evaluation method based on low voltage ride through control parameter identification, comprising the following steps: S1, establishing an inverter distributed power supply output current mathematical model, and determining key control parameters to be identified; s2, voltage and current in the monitoring data are converted into positive and negative sequence components under a dq coordinate system; s3, identifying the key control parameters based on a regression tree algorithm and a least square method; s4, establishing a fault equivalent model of the inverter distributed power supply in the low voltage ride through process; s5, voltage of each node is calculated, and then output short-circuit current is obtained; and S6, performing fault voltage sag evaluation based on the Monte Carlo method and the output short-circuit current of the inverter type distributed power supply. According to the method for identifying the control parameters of the inverter distributed power supply in the low voltage ride through process, the accuracy of voltage sag evaluation is improved.

A multi-time scale voltage control method for an active distribution network is provided. The method comprises: establishing a voltage optimization approach taking into account a large scale of distributed power supplies to realize cooperative dynamic control in case of a voltage violation generated when the distributed power supplies are incorporated into a distribution network; under a long time scale, establishing a voltage control model for controlling a capacitor bank based on voltage sensitivity analysis to realize drastic voltage regulation in case of the voltage violation by means of reactive power compensation; and under a short time scale, establishing a distributed voltage control model, and considering the problem of voltage violation, solving an optimal control strategy online by fully using active and reactive power outputs of the distributed power supplies to realize quick voltage regulation.

The invention discloses a high-voltage distribution network reactive voltage optimization method, device, equipment and medium based on a time scale, and relates to the technical field of distribution network optimization, and the method comprises the following steps: obtaining the real-time operation state data and prediction information of a high-voltage distribution network, dividing the operation time of the high-voltage distribution network, obtaining the divided data, and calculating the real-time operation state data of the high-voltage distribution network; the division data comprises a long time scale and a short time scale; under a long time scale, based on load prediction and distributed power supply output prediction, a mixed integer programming model is established, and a capacitor bank switching scheme and a transformer tap reference position are obtained; under a short time scale, constructing an optimal power flow model with minimum voltage deviation as a target, and dynamically calling the reactive capacity of the distributed energy converter for real-time correction; and establishing a cross-time-scale coordination control mechanism, triggering advanced re-optimization of a long time scale when the accumulated reactive power regulation quantity under a short time scale reaches a preset reactive power capacity threshold value, and updating an equipment action constraint condition.

The invention discloses an electric energy quality monitoring method and system based on a distributed power supply, and relates to the technical field of electric power system monitoring and control, and the method comprises the steps: collecting electric energy quality data; defining a time sequence sample in the power quality data; defining an accumulated distance matrix; and presetting the number of clusters, and updating the clustering center. According to the DTW-based clustering algorithm, normal data can be aggregated into different categories, and the accuracy of monitoring and identifying abnormal data is effectively improved. The electric energy quality is evaluated by comprehensively monitoring the voltage data, the current data and the electric energy data, and the comprehensiveness of electric energy quality monitoring is effectively improved. Based on the characteristic that the monitoring data has time sequence, clustering analysis is carried out on the electric energy quality monitoring data, and a dynamic time warping distance is combined with a clustering algorithm, so that the recognition accuracy of the electric energy monitoring abnormal data is higher.

The invention discloses an island micro-grid voltage frequency control method and system based on deep reinforcement learning, and the method comprises the steps: S1, building a mathematical model of a distributed power supply grid-connected inverter in an island micro-grid, employing droop control as an inverter control strategy, and building a voltage and current double-closed-loop model based on droop control; s2, designing a secondary voltage controller based on a deep Q network algorithm based on the mathematical model established in S1; s3, designing a secondary frequency controller based on a DQN algorithm based on the mathematical model established in S1 and the secondary voltage controller in S2; and S4, establishing an island micro-grid model containing multi-distributed power supply access, and embedding the voltage controller and the frequency controller trained in the S2 and the S3 into the island micro-grid for online application so as to realize voltage and frequency control of the island micro-grid. The method has the advantages of eliminating voltage and frequency deviation and the like.

The invention relates to the technical field of flexible power transmission of a power system, in particular to a coordinated optimization method and system of a distributed power flow controller and a medium, and the method comprises the steps: building a layered equivalent coupling model of the distributed power flow controller; taking minimization of the total loss of the flexible power transmission system as an optimization target, and performing global optimization on a parallel side output voltage vector and a series side injection voltage vector of the distributed power flow controller by using a layered equivalent coupling model to obtain an optimal coordinated optimization control strategy; obtaining a target control parameter in a target control mode according to the optimal coordination optimization control strategy; and according to the target control parameter and the real-time voltage and current data of the power transmission line, calculating a voltage compensation amount needing to be injected into the flexible power transmission system, and according to the voltage compensation amount, carrying out coordinated optimization control on the power flow of the power transmission line. According to the method, the parallel side and the series side of the distributed power flow controller are coordinated and optimized by establishing the layered equivalent coupling model, so that the voltage stability and power flow equilibrium distribution of the flexible power transmission system are effectively improved.

The invention provides a method and a system for evaluating, regulating and controlling operation stability and electric energy quality of an active transformer area based on edge calculation. The operation information such as low-voltage side voltage and current is collected through the area side edge calculation terminal, the indexes such as the load rate, the power factor, the three-phase unbalance degree, the voltage deviation and the voltage harmonic distortion rate are calculated, and the operation stability and the electric energy quality of the area are comprehensively evaluated after scoring according to a preset rule. And a distributed power supply, an energy storage device and a reactive power compensation device in the transformer area are regulated and controlled according to an evaluation result, so that the operation stability and the electric energy quality are improved. The method can comprehensively reflect the operation stability and the electric energy quality of the transformer area, and is beneficial to improving the operation stability and the power supply quality.

The invention, which belongs to the technical field of fault detection, discloses a fault distance measurement and fault positioning system for a distributed power line, comprising a line signal state analysis module, a line signal adjustment module, a line communication interference determination module and a line fault distance measurement and positioning result output module. According to the method, the accuracy of the input signal is judged by analyzing the characteristics of the abnormal signal, so that the signal is adjusted, the accuracy of the input signal of the ranging and positioning system is improved, the problem that the accuracy of the input signal is neglected in the prior art is effectively solved, the system can accurately and quickly carry out ranging and positioning on a fault, and the working efficiency is improved. Losses caused by wrong positioning faults are reduced, and power supply reliability and stability are improved.

The invention relates to the technical field of power distribution network fault distance measurement, in particular to an active power distribution network fault distance measurement method and system based on double-end voltage waveform comparison. The method comprises the following steps: acquiring voltage and current data of a first target point and a second target point of a distribution line; setting an initial fault point on the distribution line by using a dichotomy method, and calculating a first voltage waveform and a second voltage waveform at the initial fault point based on the voltage and current data of the first target point and the second target point; comparing the first voltage waveform with the second voltage waveform by adopting a directed distance algorithm to obtain a waveform difference degree; determining whether the initial fault point is a target fault point position or not according to whether the waveform difference degree meets a preset threshold condition or not; and when the waveform difference degree does not meet a preset threshold condition, based on a comparison result of the first voltage waveform and the second voltage waveform, resetting the position of the fault point by using a bisection method. According to the method, the fault location problem of the power distribution network containing the distributed power supply is solved by combining double-end voltage waveform comparison with dichotomy approximation.

The invention provides a multi-motor control method and device based on droop control, and the method enables a droop control mode, namely a distributed power balance mode, to be applied to coal mine multi-point drive belt conveyor equipment, and overcomes the defects of an existing master-slave control mode. Feedback of the actual torque measured value is referenced in the rotational speed control reference value, so that the rotational speed control reference value can reflect information of the actual torque current. When the variable-frequency driving load is too heavy, namely the torque is too large, the rotating speed control reference value can be adjusted through the rotating speed droop feedback channel, so that the torque control reference value is changed, and the purpose that the frequency converter controls power balance among the driving motors is achieved.

The invention discloses a fault detection method for a low-voltage AC system containing a distributed power supply based on SOGI and wavelet, and the method comprises the steps: carrying out the filtering of a fault signal through a second-order generalized integrator SOGI, generating an orthogonal signal, and calculating the amplitude; performing wavelet packet decomposition on the amplitude signal, and extracting a high-frequency detail component as a fault feature; and dynamically adjusting a detection threshold according to the permeability of the distributed power supply, and judging a short-circuit state based on the high-frequency detail component. According to the method, alternating current side short circuit fault detection under different fault types under different direct current system source load access conditions is realized, and the rapidity of a fault detection algorithm in a high-permeability scene is improved. The method is beneficial to improving the efficiency, reliability and universality of short-circuit fault identification.

The invention relates to the technical field of micro-grids, and discloses a control method of a distributed power supply in a plant micro-grid, and the method comprises the steps: S1, constructing a multi-source collaborative micro-grid system; s2, executing real-time power dynamic allocation; s3, working condition power balance control; s4, active regulation of bidirectional power flow and the like. Based on a real-time AGC instruction and plant load data, a hierarchical coordination mechanism is adopted, charging and discharging power is dynamically adjusted by means of stored energy to track the AGC instruction, and constant power output of wind power is maintained in combination with a wind power prediction model; when a thermal power generating unit is subjected to deep peak regulation, shutdown or fault, the system absorbs excess wind power through energy storage charging, synergistically improves the hydrogen production load power, guarantees dynamic matching of the load and power generation, and actively adjusts energy storage charging and discharging and hydrogen production loads by monitoring the power flow directions of a thermal power generating unit section and a desulfurization section in real time according to voltage fluctuation caused by bidirectional power flow. And the voltage deviation is dynamically compensated, and the system voltage stability is greatly improved.

The invention discloses a distributed power supply access and control method in an intelligent circuit breaker, and particularly relates to the technical field of intelligent circuit breakers. Determining a preliminary synchronization state of the distributed power supply based on the voltage, the frequency and the phase difference; after the synchronization condition is met, collecting the frequency change rate, the voltage amplitude and the phase angle change of each node, and constructing an electrical diagram structure with a dynamic weight; performing weighted aggregation on the node information by using a graph attention network, and outputting a virtual inertia estimated value; inverting node output power based on a synchronous machine model, and estimating a system load disturbance rate in combination with time difference; inputting the inertia and the disturbance rate into a synchronous risk prediction model to generate a synchronous risk score value; when the score value is higher than a threshold, determining that a false synchronization risk exists, and prohibiting grid connection; if the score value is lower than the threshold value, the circuit breaker is controlled to be closed, slope type power injection is executed, smooth grid connection is achieved, the dynamic judgment capacity of the distributed power supply before grid connection is effectively improved, and the grid connection instability risk is reduced.

The embodiment of the present application discloses a power supply system and its control method. The power supply system includes N distributed power sources and at least one detection control unit. The N distributed power sources are connected to the power grid in parallel or in series, and N is an integer greater than 1; the detection control unit is used to obtain the power compensation control ratio of each distributed power source based on the impedance of each distributed power source to the grid connection point of the power supply system when it detects that the oscillation of the power supply system exceeds a preset threshold range. The power compensation control ratio is the ratio of the power output of each distributed power source to the total power output of the power supply system; the detection control unit is also used to control the power output ratio of each distributed power source based on the power compensation control ratio. By adopting the embodiment of the present application, it is possible to suppress the oscillation of the power supply system and ensure the normal and stable operation of the power supply system without changing the original control circuit or adding additional equipment, so the implementation is low in complexity and low in cost.

The invention discloses a power distribution method, device and equipment for flexible interconnection of a low-voltage transformer area, a medium and a product. The method comprises the following steps: acquiring first power parameters corresponding to at least two transformer areas in the low-voltage transformer area flexible interconnection system, a second power parameter of a direct current system and cost parameters required by the at least two transformer areas; based on the first power parameter, the second power parameter and the cost parameter, constructing an optimization objective function of power distribution of each transformer area in the low-voltage transformer area flexible interconnection system; determining the initial optimal power distribution of the power distribution of each transformer area based on the optimization objective function; and according to the initial optimal power distribution and a preset inter-station power balance control strategy, performing target optimal power distribution on each station area. According to the embodiment of the invention, through the technical scheme, interconnection and mutual supply among the transformer areas can be realized, the optimal power is distributed for each transformer area, the utilization rate of the power is improved, and the efficient consumption of the distributed power supply is promoted, so that the economic and safe operation of the system is realized.

The invention relates to a distributed power distribution fault processing method and system based on edge computing, and the system comprises a sensing layer which comprises a fault sensing unit and an edge computing node which are disposed at a low-voltage power distribution system terminal, and the fault sensing unit is used for collecting the operation data and environment data of power distribution equipment, the edge computing node processes and analyzes the data; the network layer is used for realizing data transmission between the sensing layer and the platform layer; the platform layer is used for storing, managing, analyzing, processing and applying the data uploaded by the sensing layer; the application layer is an application which is developed and deployed on the platform layer and is related to fault processing; the system has the advantages that through localized data processing and real-time analysis, the response speed and reliability of the power distribution system are remarkably improved; the system can detect and respond to abnormal conditions within millisecond-level time, loss caused by faults is greatly reduced, fault reasons are accurately positioned through a comprehensive scoring model and contribution degree analysis, and the accuracy of fault diagnosis is improved.

The invention discloses a power distribution feeder fault detection method considering transient frequency response of a distributed power supply, which relates to the technical field of power distribution network fault detection and comprises the following steps: acquiring a voltage traveling wave signal and performing wavelet transformation to obtain a multi-scale wavelet coefficient; calculating wavelet energy entropy and extracting local time-frequency energy characteristics; constructing a time-frequency energy matrix and calculating a norm of the time-frequency energy matrix to judge whether detection is started or not; and after a threshold condition is met, normalizing the energy matrix, screening out invalid data, calculating a non-zero norm, obtaining a distribution proportionality coefficient according to the non-zero norm, and finally completing fault identification. The method has better effects in the aspects of accuracy and applicability.

The invention discloses an alternating-current micro-grid protection method and system based on reference point voltage waveform comparison, and the method comprises the steps: setting a first-stage reference point, a second-stage reference point and a third-stage reference point at at least A1, A2 and A3 positions of a protected line respectively; establishing a dual-port network model of a protected line and port electrical quantity, taking one port as a measurement point, and calculating the voltage of each level of reference point at the other port based on the voltage of the measurement point; and calculating the cosine similarity between the voltage waveform of the measurement point and the voltage waveform of each level of reference point, and taking the value of the cosine similarity corresponding to each level of reference point as the action criterion of each level of protection, thereby realizing the multi-level sectional protection of the protected circuit of the AC micro-grid, and determining the fault position at the same time. The method can expand the protection range, is not affected by branch loads or distributed power supply branches, is not affected by a distributed power supply control strategy, and can be suitable for a grid-connected operation mode and an island operation mode at the same time.

The invention provides an AC / DC converter for microgrid distributed power supply access and a hybrid optimization control method. The method comprises the following steps: presetting the maximum switching frequency fsmax of a DAB converter; when the real-time switching frequency fs of the DAB converter is smaller than the preset maximum switching frequency fsmax, modulating the DAB converter by using the frequency conversion SPS; when the switching frequency fs reaches a preset maximum switching frequency fsmax, modulating the DAB converter by using a fixed-frequency EPS, and enabling fs to be equal to fsmax; when the fixed-frequency EPS is used for modulation, if Iacsin (omega t) is smaller than or equal to nVdc (K1) / (8fsLkK2), the DAB converter is in an internal mode; otherwise, enabling the DAB converter to be in an external mode. According to the method disclosed by the invention, all the switching tubes can realize zero-voltage switching in a full-load range, and the converter can keep high PF and low THD values.

The invention provides an overhead line power supply reliability assessment method and device considering a distributed power supply. The method comprises the following steps: acquiring an assessment parameter set of a first line; calculating the evaluation parameter set according to a preset evaluation method to obtain the number of households during first power failure and the number of households during second power failure; obtaining the total number of lines and the total number of users corresponding to the medium-voltage overhead line set; determining a third number of households during power failure according to the total number of lines, the first number of households during power failure and the second number of households during power failure; the third number of households during power failure represents the number of households during power failure of all medium-voltage overhead lines; determining the average power failure time of the users according to the number of households in the third power failure and the total number of the users; and determining the target power supply reliability corresponding to the medium-voltage overhead line set according to the user average power failure time. Various evaluation parameters can be comprehensively considered, so that the accuracy of power supply reliability evaluation of the medium-voltage overhead line is improved.

The invention discloses a distributed power supply cooperative control method based on transient dynamic characteristic adaptive driving, which adopts a multi-dimensional transient performance coupling evaluation function, unifies multiple targets including frequency, voltage, power angle and operation economy into a global optimization target, and fundamentally solves the defect of single target in the prior art. A collaborative strategy network based on dynamic context awareness is adopted, and a time sequence processing technology based on an attention mechanism is utilized, so that an intelligent agent can extract key transient dynamic characteristics from a local observation sequence, and the limitation of no memory and non-self-adaption in the prior art is broken through; according to the method, a cooperative control flow of a cooperative control strategy is provided, a high-performance learning type strategy is combined with a high-reliability safety monitor, the problem that safety and performance are difficult to be compatible is solved, fundamental transformation of distributed power supply control from passive, local and static rule-based modes is achieved, and the transient stability margin of a novel power system is remarkably improved.

The invention discloses a multi-voltage-level collaborative operation optimization method and system considering new energy consumption. The method comprises the following steps: clustering data of a distributed power supply and a load demand in a new energy output operation scene; establishing a single-voltage level operation optimization model considering new energy consumption according to a clustering result, and analyzing an interactive influence between different voltage levels and a weight relationship between multi-dimensional economic indexes; and constructing a double-layer model of multi-voltage-level operation optimization generated based on target function constraint, and carrying out iterative solution on an optimization problem of the double-layer model to realize multi-voltage-level collaborative operation optimization. According to the method, the interactive influence between different voltage level operation modes is fully considered, and the weight of the multi-dimensional new energy economic consumption index is considered, so that the optimization of each voltage level operation mode on the premise of ensuring the safe operation of the power grid is effectively realized, and the safety and economy of new energy consumption are improved.

The invention discloses an urban rail hybrid energy storage system power distribution method based on LPF-MPC, and the method comprises the steps: employing a hybrid energy storage system (HESS) composed of a super capacitor and a battery for the frequent starting and braking of an urban rail train to generate a large amount of braking energy; on the basis that a low-pass filter (LPF) distributes power required by HESS, the rolling prediction and optimization control capability of model prediction control (MPC) is utilized to control the minimum value of the state of charge (SOC) of a super-capacitor to be close to a preset expected value, so that power distribution is optimized, and loads are reasonably distributed to the super-capacitor and a battery; according to the method, the working interval of the super-capacitor SOC is dynamically adjusted, the capacity advantage of the super-capacitor is fully played, the charging and discharging times of the battery are reduced, the energy management efficiency of the urban rail hybrid energy storage system is effectively improved, the system stability is enhanced, and the service life of the battery is prolonged.