573 results about "Grid fault" patented technology

The invention provides a power transmission network equipment fault diagnosis and life prediction method and system, and relates to the technical field of fault diagnosis, and the method comprises the steps: obtaining the time sequence electrical characteristic data of a plurality of monitoring nodes, carrying out the window segmentation and statistical characteristic extraction, building a dynamic association graph structure based on a space-time association constraint model, and obtaining the time sequence electrical characteristic data; and calculating the abnormal contribution degree of each node, marking candidate abnormal nodes, determining a fault propagation path through reverse tracing and path analysis, and finally outputting a fault positioning result. According to the invention, abnormal nodes can be accurately identified, a fault propagation path can be accurately tracked, and the accuracy and timeliness of power transmission network fault diagnosis are improved.

The invention relates to the technical field of power grid fault positioning, in particular to a rapid power grid fault positioning system based on digital twinning and AI, which obtains multi-dimensional operation data of each node of a power distribution network, constructs a structured data set, reflects the state of the system, and performs joint modeling on node features and a topological structure through a graph neural network. And reasoning to generate candidate fault nodes. And further constructing a digital twinborn model containing load flow calculation and disturbance injection, performing analogue simulation on candidate nodes, extracting an electrical quantity change rate, performing fuzzy similarity matching with operation data in a fault window, and accurately positioning a fault node. Through cooperation of three stages of prediction, simulation and matching, the problems of weak complex topology perception, poor perturbation identification, positioning offset and the like of the existing method are effectively solved, and the fault positioning precision and robustness are improved.

The invention relates to the technical field of power distribution network fault processing, in particular to a power distribution network fault automatic reconstruction control method of a power system. The method comprises the following steps: collecting operation state data of the power distribution network; dividing the power distribution network operation state data into power distribution network operation fault data and power distribution network operation state candidate data to be detected; performing disturbance interference potential state simulation analysis on the to-be-detected candidate data of the operation state of the power distribution network to generate disturbance interference potential state simulation data of the power distribution network; performing disturbance fault analysis through the power distribution network disturbance potential state simulation data to generate power distribution network disturbance fault data; based on the power distribution network operation fault data and the power distribution network disturbance fault data, intelligent reconstruction control decision design is carried out, and power distribution network intelligent reconstruction control decision data is generated; and power distribution network fault automatic reconstruction control operation is executed through the power distribution network intelligent reconstruction control decision data. According to the invention, efficient automatic reconstruction control is realized when the power distribution network fails.

The invention relates to the technical field of power systems, and discloses a power distribution network fault positioning method, device and equipment and a medium, and the method comprises the steps: synchronously collecting fault traveling wave data through a transformer area intelligent terminal and a feeder terminal disposed in a power distribution network; dynamically calculating traveling wave transmission parameters based on the topological information and the real-time operation parameters of the power distribution network; performing feature extraction and fusion processing on fault traveling wave data acquired by the transformer area intelligent terminal and the feeder terminal to generate a joint feature matrix; based on the joint feature matrix and the traveling wave transmission parameters, cooperative verification is carried out through the single-end positioning information and the double-end positioning information, and a fault section is determined; and performing fault type identification on the fault section by using the intelligent classification model, and performing consistency verification according to an obtained fault type identification result and the fault section to generate a fault diagnosis result. According to the invention, accurate positioning of the power distribution network fault can be realized, and the problems of positioning blind areas, high cost and easy misjudgment in the prior art are solved.

The invention discloses a reclosing coordination control method and system based on electrical parameter measurement, particularly relates to the technical field of intelligent power grid fault processing and security defense, and is used for solving the problem that the reliability of fault judgment is reduced due to the fact that high-proportion distributed photovoltaic is connected to a power distribution network. A harmonic detection signal is injected during a reclosing waiting period, a response signal is measured, harmonic subspace energy distribution is extracted, an energy distribution matrix is constructed to calculate a nuclear norm change rate and form similarity, a system harmonic impedance stable state is judged through double verification, and finally a reclosing decision is executed according to a fault judgment parameter. The method can accurately identify the convergence characteristic of the dynamic process of the system, effectively distinguish the instantaneous fault from the permanent fault, and significantly improve the reclosing success rate and the power supply reliability of the distributed photovoltaic power distribution network.

The invention discloses a power failure event cooperative processing method, system and device based on geographic information and a medium, and relates to the technical field of power system power distribution network fault processing and informatization. The method comprises the following steps: when a power failure event occurs, acquiring multi-source heterogeneous data from an associated system; performing fault analysis on the multi-source heterogeneous data through a fault diagnosis model, and outputting fault positioning information and a fault type; obtaining associated maintenance resource state data and real-time traffic road condition data according to the fault positioning information; the maintenance resource state data comprises a rush repair team position, a skill level and a vehicle state; and based on the fault positioning information, the fault type, the user attribute, the historical work order data, the maintenance resource state data and the real-time traffic road condition data, generating an optimal maintenance scheduling scheme through a reinforcement learning scheduling model. The cross-department and cross-business cooperative processing is realized, and the first-aid repair efficiency and the resource utilization rate are remarkably improved.

The invention belongs to the crossing field of artificial intelligence and a power system, and discloses a power grid fault handling plan knowledge retrieval method and a related device. The power grid fault handling plan knowledge retrieval method comprises the following steps: on the basis of an obtained expression, generating a query by utilizing a large language model, and performing retrieval in a constructed graph database to obtain a power grid fault handling plan knowledge retrieval result; when the graph database is constructed, firstly, all themes in a free text of a selected power grid fault field are recognized, and an entity which can best represent the theme in each theme serves as a seed entity; then, entity relation triads in the free text are extracted through a large language model and serve as candidate triads, integration is carried out to obtain a fused knowledge graph, the fused knowledge graph is stored, and a constructed graph database is obtained. The problems that an existing retrieval method is low in query efficiency and poor in accuracy are solved.

The invention discloses a parallel operation data interaction system and method for hybrid energy storage inverters, and relates to the technical field of power systems, and the system comprises a parallel operation data interaction center, a data collection and monitoring module which is used for collecting load data in a power distribution network and monitoring the operation state of each hybrid energy storage inverter, performing feature analysis to extract load operation features to obtain a load operation feature sequence table; and the load prediction module is used for obtaining a load trend index by using the historical data and the load operation characteristics in the load operation characteristic sequence table in combination with a pre-trained load prediction model, and analyzing the change trend of the load. By collecting load data and monitoring the operation state of the inverter, the operation condition of the system can be comprehensively mastered, abnormity can be found and processed in time, the output of the inverter is adjusted in advance and the operation mode is switched in combination with the load prediction model, load fluctuation and power grid faults are effectively handled, and the stability and reliability of the power system are remarkably improved.

The invention relates to the technical field of new energy grid-connected control, in particular to a fault stage transient stability analysis method and system for a following-constructed network type converter series-parallel system, and the method comprises the steps: enabling a constructed network type converter to be equivalent to a controlled voltage source series impedance, enabling a following network type converter to be equivalent to a controlled current source, and enabling the controlled current source to be equivalent to a controlled voltage source series impedance; the whole series-parallel system is equivalent to a scene in which double voltage sources and a single current source are jointly connected in parallel to a PCC point, and a series-parallel system model is constructed; according to the series-parallel system model, respectively representing an active power coupling term of the network-building type converter and a voltage coupling term of the network-following type converter under the condition of considering parallel connection of the network-following type converter and the network-building type converter; according to the coupling term, remodeling an active loop control structure of the network-constructing converter and a phase-locked loop synchronization structure of the network-following converter, and obtaining a transient analysis model of the series-parallel system considering the coupling term; the transient stability of the hybrid system in the power grid fault stage is analyzed through the transient analysis model, and the influence on the transient stability is effectively represented.

The invention discloses an offshore wind power typical fault transient waveform rapid simulation method and system, and relates to the technical field of offshore wind power unit grid connection and power grid fault simulation, and the method comprises the steps: obtaining an original typical fault voltage transient waveform at an offshore wind power unit grid connection point; a wavelet analysis method is adopted to carry out filtering processing on the fault voltage transient waveform, decomposition is carried out to obtain an approximate signal and a detail signal, a fundamental wave and a main oscillation waveform in the detail signal are extracted, an RLC second-order fault simulation circuit is established, waveform superposition is carried out to form a reconstructed waveform, a reconstructed waveform analytic expression is obtained, and fault transient characteristic parameters needing to be solved are determined; preliminarily fitting the initial values of the characteristic parameters, and iteratively solving the final values of the characteristic parameters by adopting a nonlinear least square method; fitting and solving equivalent line parameter values in combination with a fault feature expression; and substituting the waveform into a fault simulation circuit, and carrying out analog simulation to generate a reproduction waveform. According to the method, the typical fault transient waveform of offshore wind power can be rapidly and accurately reproduced.

The invention discloses a method and a system, and relates to the technical field of relay protection. The method comprises the following steps of: acquiring electrical data of a synchronous parallel point, inputting two paths of voltage data, setting a setting value, judging the state of the synchronous parallel point based on the input two paths of voltage data, and performing manual intervention on asynchronous protection after asynchronous protection quits. According to the grid-connected asynchronous protection method provided by the invention, the state of a synchronous parallel point can be accurately judged by comparing the output two paths of voltage data with the setting value set in the device, the fault condition and position of a power grid can be more accurately judged, the abnormal state can be quickly detected, a circuit breaker can be timely pulled open, and the safety of the power grid is ensured. The method prevents generation of strong impact current, prevents burning loss of equipment, effectively protects electrical primary equipment, compares timing time with a setting value set by a system, ensures that non-synchronous protection does not continue to work due to misoperation, and enables an electric power system to recover to normal more quickly. According to the invention, better effects are achieved in the aspects of preventing electric appliance burnout and response time.

The invention discloses a rapid fault isolation method integrating protection, measurement and control of a box-type substation, particularly relates to the technical field of fault isolation of a power distribution network, and aims to solve the problem that an existing box-type substation is not complete in protection action information, disturbance exists in measurement and a primary wiring relation is complex. The problems of difficulty in timely and accurate judgment of a fault section, large isolation range, insufficient supply guarantee of important users and lack of traceable evidence chain in a fault processing process are solved. The method comprises the following steps: dividing sections according to primary switches and cable joints in a box-type substation, establishing a section-level topology model for unified time service and fault evidence fingerprints bound with protection configuration, scoring operation slices based on section fault hypothesis and a theoretical event mode, and solving a minimum isolation switch set under isolation constraint, so as to obtain a minimum isolation switch set; therefore, when the protection action is incomplete, the measurement is disturbed and the wiring is complicated, the fault section can still be locked, and an isolation scheme considering the user supply guarantee and the electrical safety boundary is generated, so that the fault isolation correctness and rapidity are improved.

The invention discloses a network construction type VSG power grid fault active support cooperative control method, and belongs to the technical field of new energy grid-connected control. According to the method, the power grid voltage is monitored in real time, and a cooperative strategy is dynamically triggered: when the voltage drops below a set value, a cooperative control mechanism is started, including (1) self-adaptive active power adjustment based on a power angle stability margin and dynamic correction of a power instruction value to suppress kinetic energy accumulation of a rotor; (2) voltage tracking type reactive compensation is superposed in a reactive control loop, reactive current is increased in real time according to the drop depth, continuous reactive support is provided, and steady-state overcurrent is restrained; and (3) inputting a virtual resistance inductor, and limiting a transient over-current peak value by suppressing a dq-axis coupling current component. When the voltage is normal, the conventional VSG control mode is maintained. According to the invention, power-reactive power-impedance three-dimensional cooperation is realized, power angle stability, current limitation and voltage support are considered, and the stability and active support capability of the network-forming VSG under the power grid drop fault are significantly improved.

The invention provides a power cooperative control method, device and system based on load removal and a medium. The method is applied to a micro-grid configuration flexible interconnection device for micro-grid fault protection. After the fault is positioned, a VSG low-voltage ride-through strategy is adopted to carry out current limiting, an importance quantification model is constructed for loads, and according to a real-time operation condition, a shearable load with the minimum influence on the system is screened to carry out priority removal; and dynamic power transmission adjustment of the flexible interconnection device is synchronously triggered, a micro-grid power flow path is reconstructed, and finally a fault is removed based on a current limiting and directional element protection method. According to the invention, system protection is realized by fusing intelligent load removal and flexible power adjustment, and the fault isolation speed and the stability of the microgrid system are effectively improved.

The invention relates to the technical field of energy storage systems, in particular to a symmetric / asymmetric fault ride-through control method for a network-forming type energy storage converter, which comprises the following steps of fault detection and classification, adaptive control target decision and multi-mode unified control. According to the method, adaptive and intelligent fault ride-through is realized, the control accuracy and efficiency are improved, the adaptability and robustness of the energy storage system in different power grid fault scenes are enhanced, the center of gravity is dynamically adjusted and controlled according to the charge state of the energy storage system or the received power grid dispatching instruction, the maximum utilization of system resources is realized, and the power grid fault ride-through efficiency is improved. The voltage and frequency support is provided for the power grid, the response speed is far higher than that of traditional deviation adjustment, the voltage support effect at the moment of a fault is greatly improved, sudden change of power and current is effectively prevented, secondary impact on the recovered power grid caused by off-grid of the converter or power oscillation is avoided, and the friendliness of network forming equipment is embodied.

The invention relates to the technical field of articles for old people, in particular to an adjusting method, system, equipment and medium for improving the short circuit ratio of a new energy station, and the method comprises the steps: calculating a first target index and a second target index of the new energy station, and switching a part of grid-connected converters into a virtual synchronous generator control mode; when the second target index does not meet the short-circuit ratio control requirement, changing the equivalent impedance of the grid-connected point by adjusting the virtual impedance of the virtual synchronous generator so as to reduce the second target index of the new energy station; and when the grid fault causes the voltage drop of the grid-connected point, reactive voltage control is carried out through the virtual exciter of the virtual synchronous generator, and voltage support is provided for the grid-connected point. The method has the beneficial effects that flexible and efficient dynamic adjustment is realized by using the virtual synchronous generator, the system operation efficiency is improved, and the short-circuit ratio of a new energy field station is improved by combining virtual impedance and a reactive power support function, so that the operation capability of the new energy field station in a weak power grid is enhanced.

The invention discloses a power grid power flow real-time calculation and state estimation method and system based on a PMU, and belongs to the technical field of electric measurement and electric fault positioning. The method comprises the following steps: synchronously measuring electrical variables, including a voltage phasor and a current phasor, of a power grid node through PMU equipment to obtain synchronous phasor data, and verifying time and topology consistency; the power grid observability grade is judged based on PMU configuration node distribution corresponding to the verified electric measurement data; directly generating a real-time state estimation result through linear calculation based on PMU electric measurement data if the whole domain is observable; and if a part is observable, fusing PMU and SCADA data, carrying out nonlinear state estimation through a weighted least square method, distributing a high weight for the PMU electrical measurement data, and dynamically adjusting the SCADA weight to suppress bad data. According to the method, through observability adaptive judgment, the precision and efficiency of state estimation are improved, a data basis is provided for power grid fault positioning, and the method is suitable for practical application scenes of various PMU coverage degrees.

The invention discloses a flexible AC / DC hybrid power distribution network fault recovery optimization method and system based on multi-agent deep reinforcement learning, a computer device and a non-transient computer readable storage medium, and the method comprises the steps: firstly constructing an AC / DC power distribution network model considering the operation characteristics of a flexible switch and a voltage source converter; then, flexible equipment is modeled as an independent agent, a multi-agent training architecture is established, a composite reward function fusing a load recovery rate, voltage stability and operation safety is designed, and a mechanism combining centralized training and distributed execution is adopted to realize multi-point cooperative control between the flexible equipment; and finally, designing a recovery optimization process for rapid decision and control execution after the fault. The method can realize higher load recovery rate and better voltage control performance in various fault scenes, has the advantages of strong decision real-time performance, good system expandability, strong strategy generalization ability and the like, and is suitable for autonomous recovery and intelligent regulation and control of the novel flexible AC / DC hybrid power distribution network.

The invention relates to the technical field of electric power, and discloses a photovoltaic grid-connected system fault ride-through method based on VSG current limiting control. When it is detected that the PCC voltage is lower than a preset voltage threshold value, the photovoltaic inverter closes power outer loop control, an active current reference value and a reactive current reference value are reconstructed according to the voltage drop depth, it is guaranteed that grid-connected operation of the photovoltaic side is kept in the fault period, and voltage support is provided; a second-order rotor motion equation and an excitation control equation are established in an energy storage converter controller to simulate a synchronous generator, when PCC voltage drop or a power grid fault is detected, dynamically-adjusted virtual impedance is injected into the output end of a VSG according to the voltage drop depth so as to increase equivalent impedance and actively limit the peak value of short-circuit current, and the voltage drop or the power grid fault is detected. And switching the active power reference value into an active power reference value in a fault state and reducing or inhibiting active output, and switching the reactive power reference value into a reactive power reference value in the fault state so as to enhance the reactive power support capability of the energy storage system and maintain the voltage stability of the grid-connected point.

The invention provides a power distribution network partitioning method and device, equipment and a storage medium. The method comprises the steps that firstly, a node voltage-reactive power sensitivity matrix and historical operation data of a distributed power supply are obtained, the structural distance between nodes is calculated, the historical data are normalized, the attribute similarity is obtained in combination with an attribute weight matrix, and the two are added to generate an electrical distance. Resolution parameters are dynamically adjusted according to reverse power flow intensity, and the parameters are increased when the power flow is enhanced to refine clusters. According to the method, the limitation that traditional partition depends on geographical proximity or simple parameters is broken through, accurate partition is achieved by quantifying electrical coupling and resource characteristics, the problem of poor connection in the cluster is solved, the on-site consumption capacity of new energy is effectively improved, the transmission pressure of a main network is reduced, and the method is suitable for large-scale popularization and application. And meanwhile, the fault recovery capability and the calculation efficiency of the power grid are enhanced, and the method is suitable for district power balance optimization in a high-permeability distributed power supply access scene.

The invention belongs to the technical field of power supply and distribution of a data center, and provides an electrical protection method and system for power supply and distribution of the data center, aiming at the data center of a 2N power distribution architecture, electric energy parameters of two paths of external mains supply are collected and transmitted to an EMS of an energy storage system, and system charging and discharging power is controlled and adjusted through the EMS. According to the fact that the sum of the power on the two alternating current buses is larger than a set protection threshold value, the first switch device is controlled to cut off the connection between the energy storage system and the second alternating current bus, overload of a superior line or a transformer during charging or power supply switching is prevented, and in addition, through the measures of a reverse power detection device, first-path voltage loss linkage and the like, the energy storage system can be effectively protected. An external electrical protection system independent of the energy storage system is added to form dual protection, so that a dual fault superposition scene of energy storage system faults or power grid faults is effectively isolated, and the reliability of an originally designed power supply network of the data center is guaranteed.

The invention belongs to the field of power grid system control, and discloses a power grid system virtual impedance dynamic control method, system and device and a medium. The control method comprises the following steps: judging whether the power grid system breaks down or not by acquiring power characteristics of electronic equipment in the power grid system, including content proportions of voltage harmonics and current harmonics, current amplitude changes and positive and negative sequence voltage amplitudes. When a fault occurs, normal virtual impedance is calculated and combined with response current of harmonic waves to obtain dynamic virtual impedance, and then self-adaptive virtual impedance is comprehensively obtained and switched to the impedance value. According to the method, rapid and accurate dynamic current limiting and reactive power supporting under the complex fault working condition are achieved, the adaptability and stability of power electronic equipment to power grid faults are improved, fault current is effectively restrained, equipment damage is prevented, and meanwhile the transient characteristic and reliability of a system are enhanced.

The invention provides a multi-family energy storage cooperative power supply system and method based on neighborhood elasticity, and relates to the technical field of power systems and energy storage. The system comprises: a neighborhood discovery module, which is used for establishing a collaborative micro-grid when a grid fault occurs; the off-grid switching module is used for forming an island micro-grid to supply power to neighborhoods; the power supply reputation module is used for calculating a reputation integral value of each family node; the power scheduling control module is used for generating a power scheduling instruction according to the power utilization demand, the energy storage state and the reputation integral; and the grid-connected clearing module is used for automatically calculating an energy exchange clearing result after the power grid is recovered. The method correspondingly comprises the steps of networking and switching, cooperative power supply, grid connection and liquidation and the like. According to the invention, the reliability and toughness of community emergency power supply can be improved, and full-process automatic management is realized.

The invention relates to a black-start capability evaluation method and system for a network construction type new energy and energy storage device. Detecting fault nodes of the power grid according to the real-time running state of the power grid; and reconstructing a power grid topological graph according to the fault nodes. In the reconstruction of the power grid topology, calculating a recovery priority score of a load node, and calculating the real-time output capability of each new energy and energy storage device; and converting the reconstructed power grid topological graph into a weighted graph to restore the priority, the output capability and the path cost of an intermediate node, and correcting the edge weight and the node weight of the weighted graph. Based on the corrected weighted graph, searching a black-start path and deploying the black-start path in a simulation environment to execute simulation; and recording the operation data of each new energy and energy storage device in each simulation process, and evaluating the black-start capability of a single device. The method can accurately reflect the actual connectivity and operation constraint when the power grid is powered off, and provides black-start capability evaluation closer to the real operation condition for each new energy and energy storage device.

The invention discloses a feature data screening method and device for power grid fault assessment, and belongs to the field of power systems, and the method comprises the steps: firstly obtaining a local bus set of a power grid and a candidate feature set corresponding to the set; performing a fault simulation experiment on the power grid according to a preset power system simulation platform to obtain characteristic quantity data corresponding to each characteristic quantity and form a characteristic quantity data set; according to a Mahalanobis distance principle and a Spearman level correlation coefficient calculation method, sorting each characteristic quantity data in the characteristic quantity data set to obtain an intermediate candidate characteristic set; screening each intermediate candidate feature in the intermediate candidate feature set by adopting an incremental feature subset strategy to obtain a plurality of final candidate features; and finally, performing fault assessment on the power grid according to each final candidate feature and the local bus set, and outputting a fault assessment result, so that the accuracy of power grid fault assessment can be improved through implementation of the method.

The invention relates to the technical field of power grid faults, in particular to a coal mine power grid fault positioning method, which comprises the following steps: collecting transient current traveling wave signals generated when a fault occurs; executing a first layer of PSO to adaptively find an optimal parameter combination for the VMD, and processing a transient current traveling wave signal based on MRSVD to obtain an input signal of the VMD; inputting an input signal into VMD based on the optimal parameter combination, decomposing to obtain intrinsic mode function components, calculating a kurtosis-permutation entropy index of the intrinsic mode function components, selecting the intrinsic mode function component with the highest value as an optimal mode component, extracting initial traveling wave arrival time by combining a symmetric differential energy operator, executing a second-layer PSO, and obtaining a second-layer PSO; correcting the initial traveling wave arrival time through a physical constraint optimization model, and adjusting the traveling wave velocity by adopting a self-adaptive wave velocity estimation strategy to obtain the corrected traveling wave head time and traveling wave velocity; and calculating the position of the fault point based on the corrected traveling wave head time and traveling wave velocity. According to the invention, rapid and accurate positioning of fault points is realized, and the robustness is high.

The invention relates to the technical field of new energy, and discloses a fault ride-through method and device. The method is applied to a new energy flexible direct current power transmission grid-connected system, and comprises the following steps: controlling a flexible direct current power transmission subsystem to indicate that a sending-end converter station and a sending-end new energy unit have a receiving-end power grid fault under the condition that the receiving-end power grid has a fault; obtaining a direct current voltage value of the sending end flexible direct current converter valve at the current moment; determining a first difference value between the DC voltage value and the DC voltage rated value; and according to the first difference value, the sending end new energy unit and the sending end flexible DC converter valve are controlled, so that the DC voltage value is reduced to be below a preset voltage threshold value. According to the invention, under the condition of the fault of the receiving end, the surplus power can be consumed by controlling the new energy unit of the sending end and the flexible direct current converter valve of the sending end without configuring a centralized energy consumption device, and the fault ride-through of the power grid of the receiving end is realized.

The invention discloses a transient reactive power recovery control method, system and device for a new energy station and a storage medium, and the method comprises the steps: obtaining dynamic model parameters of a target new energy station, obtaining near-region power grid parameters of the target new energy station, building a near-region simulation model of the new energy station, carrying out the fault simulation of a near-region station of the target new energy station, and carrying out the fault simulation of the near-region station of the target new energy station. Identifying a target site causing transient voltage instability, and setting a fault occurring on the target site as a target fault; taking the maximum reactive power output and the reactive power recovery rate as optimization variables, constructing a multi-objective optimization function, and setting differentiation constraints; and carrying out iterative solution on the optimization function, evaluating system stability responses under different parameter combinations, and outputting an optimal minimum active output and an active recovery rate as a transient active recovery strategy of the new energy station. By optimizing the transient reactive power recovery control strategy of the new energy station after the power grid fault, the transient voltage stability of the near area of the new energy station is improved.

According to the power grid regulation and control and relay protection semi-physical collaborative simulation training method and system, through power grid-substation joint simulation and integrated fault driving, full-link fault simulation and response from the power grid level to the device level are achieved, and collaborative training of scheduling and operation and maintenance personnel is supported; multi-mode relay protection practical training equipment is constructed, a real device, a simulation device, three-dimensional digital protection and regulation alarm signal simulation are fused, functions of device practical operation, logic unvarnished transmission, abnormal injection, operation tracing and the like are supported through different training carriers, and different levels of training requirements are met; a dynamic power flow long-period time sequence simulation module is introduced, dynamic following of power grid loads and power generation plans is achieved, the development and recovery process of faults in a real power grid environment is simulated, the authenticity, the collaboration and the systematicness of power grid fault training are remarkably improved, and the training efficiency is improved. And a key technical support is provided for the cultivation of cross-professional co-processing capability under the background of a novel power system.

The invention provides a micro-grid multi-energy coordinated scheduling method and device, and the method comprises the steps: building a multi-energy coordinated scheduling optimization model containing time-varying constraints through obtaining the data of a photovoltaic power generation system, an energy storage system and a load system in a micro-grid, and carrying out the optimization solving through employing an improved particle swarm optimization algorithm, and designing a gridding vector current control strategy to realize fault ride-through control, executing multi-energy coordinated scheduling control, and realizing stable operation of the micro-grid through hierarchical execution. According to the method, the problem that a traditional micro-grid dispatching method is insufficient in stability and economical efficiency in the face of renewable energy source uncertainty and power grid faults is solved, and the reliability and economical efficiency of micro-grid operation are improved.