451 results about "Equivalent model" patented technology

The invention discloses a servo motor dynamic overload detection and protection method based on a heat accumulation model, which relates to the technical field of servo system fault protection application, and comprises the steps of constructing a heat accumulation equivalent model, dynamically detecting an overload state, executing a heat dissipation recovery strategy, implementing a multi-stage protection mechanism, self-adaptive environment compensation and a historical data learning function. Through discretization processing of overload curve data and a nonlinear acceleration calculation strategy, the problems of protection lag and false triggering caused by traditional single-parameter detection are avoided, it is ensured that the motor can respond in time in light load, heavy load and load fluctuation scenes, the burn-out risk of the motor is reduced, and through integration of an environment temperature sensor and a heat dissipation condition evaluation unit, the reliability of the motor is improved. The heat accumulation coefficient and the heat dissipation attenuation parameter are dynamically adjusted, the problem of model deviation caused by environment interference is solved, when heat dissipation deterioration and temperature feedback abnormity are detected, the heat dissipation recovery period is automatically prolonged, calculation logic is corrected, and the continuous operation reliability of the system is improved.

The invention discloses a power coupling-considered capacity ratio estimation method for a network-constructing / network-following multi-machine hybrid system, and the method comprises the steps: building a GFL-GFM hybrid system model, combining VSG power coupling small signal modeling and a dynamic relative gain matrix (DRGA), and quantifying the coupling strength of active / reactive power to output voltage; the frequency domain impedance characteristic of the GFM converter is simplified, and an ideal voltage source series equivalent reactance equivalent model is constructed; deriving an analytical relationship between a generalized short-circuit ratio (gSCR) and a capacity ratio based on the model, and generating a ratio formula in combination with engineering boundary sub-scenes to form a ratio range suitable for multiple scenes; for coupling time-varying characteristics, a closed-loop mechanism of'mixed mode-coupling sensing-correction calculation-execution feedback 'is constructed, and the ratio is dynamically adjusted. According to the method, coupling quantization and multi-machine coordination control are deeply fused, the problem that the external characteristic model precision and the multi-working-condition adaptability are difficult to consider under complex environment coupling is effectively solved, and the engineering applicability of the hybrid fan system is enhanced.

The invention discloses a cooperative scheduling method for a zero-carbon park complementary energy storage system, and the method comprises the steps: enabling an electric energy quality index to be explicitly incorporated into an optimization target through multi-source resource dynamic modeling and scene prediction, and building a strong coupling relation between a physical constraint and a scheduling decision; the hierarchical execution mechanism gives consideration to global optimization and local quick response, realizes undisturbed switching under abnormal working conditions, forms a prediction-optimization-execution-feedback closed-loop control system, and can accurately describe physical connection and electrical characteristics of a park power grid by establishing a power distribution network equivalent model and acquiring topological parameters, thereby realizing the optimal control of the park power grid. And basic network data is provided for subsequent optimization. By determining the controllable resource set and completing topological mapping, the position and the regulation and control range of each device in the power grid can be determined, and mistaken sending or conflict of instructions can be avoided. An apparent power upper limit constraint and SOC dynamic model is established, overload operation of equipment can be avoided, the energy storage charging and discharging capacity can be accurately represented, and the performability of a scheduling scheme is ensured.

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 stability analysis of a new energy grid-connected system, in particular to a new energy real-time short-circuit ratio margin evaluation method, system equipment and a medium, and the method comprises the steps: building an equivalent model based on power grid parameters, calculating equivalent capacity, and carrying out online correction in combination with multi-source data; calculating a new energy grid-connected short-circuit ratio according to the equivalent capacity ratio, calculating a short-circuit ratio index based on a constraint equation, refreshing a real-time index through measurement data of local voltage and current, and outputting a real-time short-circuit ratio; calculating the short-circuit ratio margin of the new energy station based on the short-circuit ratio difference value, quantitatively evaluating the stability, judging a stable state according to a positive value and a negative value of the margin, quantifying an instability risk level according to an absolute value of the margin, and generating a graded early warning signal and a control instruction; through dynamic fusion of multi-source data correction capacity, local measurement of millisecond-level refreshing indexes and margin positive and negative values, a control instruction is triggered, stable monitoring and active defense are realized, and the anti-disturbance capability and the safety level of a high-proportion new energy power grid are remarkably improved.

The invention provides a new energy station grid-connected oscillation risk assessment method and device, and relates to the field of new energy grid-connected control. The method comprises the following steps: constructing a dynamic equivalent model based on new energy station operation parameters; based on the dynamic equivalent model, obtaining impedance spectrum feature domains in different control modes; calibrating an impedance spectrum feature domain based on a semi-physical simulation platform; inputting the calibrated impedance spectrum feature domain into a grid-connected oscillation risk assessment model, and outputting oscillation damping ratio predicted values of the new energy station in different control modes based on the grid-connected oscillation risk assessment model; and constructing a self-adaptive threshold, and evaluating the grid-connected oscillation risk of the new energy station based on the magnitude relationship between the oscillation damping ratio predicted value and the self-adaptive threshold in different control modes. The method solves the problems that when different control modes are switched or external operation conditions are changed, a prediction result of a traditional method is prone to distortion, and the real oscillation risk of the new energy station is difficult to reflect accurately.

The invention relates to the technical field of data processing, in particular to a power grid probability equivalent model construction method and device based on multi-scene clustering, and the method comprises the steps: obtaining a power grid multi-dimensional data source, executing a spatial-temporal feature decoupling operation, and outputting a spatial-temporal feature tensor with a weight identifier; executing graph-driven enhanced clustering operation based on the tensor, constructing a topological risk graph structure, and generating a safety margin offset thermodynamic diagram through a deep reinforcement learning decision feature compression strategy; executing a double-algorithm optimization traceability operation, adopting a genetic algorithm to encode a feature cutting operation, taking a margin deviation value as a fitness function, optimizing a time window parameter by a butterfly algorithm, and outputting a feature operation traceability matrix; and feeding back the matrix to the enhanced clustering operation to update the decision rule. According to the method, the problem of dynamic security risk quantification distortion caused by scene clustering dimension reduction is solved under the constraint of limited computing resources through risk perception feature processing, enhanced resource allocation and a closed-loop architecture of double-algorithm traceability optimization.

The invention discloses a flow resistance and heat transfer simulation analysis method for a thermal management refrigerant side integrated module, and relates to the technical field of computer simulation. The method mainly comprises the following steps of: dividing a computational domain model into a solid domain, a fluid domain comprising a plurality of single-phase flow channel sub-domains and a flow channel section which is in a gas-liquid two-phase state and exchanges latent heat along with phase change in combination with the need of an actual analysis working condition; performing polynomial fitting on various parameters by fixing the inlet pressure value of each single-phase flow channel sub-domain; loading the fitted physical property function to the corresponding runner sub-domain, and setting a constant material attribute for the solid domain runner plate; a conjugate heat transfer model is started on an interface of a fluid domain and a solid domain, and interface heat flux density conservation and temperature continuity simulation is carried out; setting boundary conditions; and executing conjugate heat transfer simulation calculation until convergence calculation is completed. According to the method, the simulation precision is improved through fusion of three core technologies of dynamic change physical property fitting, solid-liquid conjugate heat transfer coupling and two-phase flow latent heat equivalent modeling.

An intelligent unmanned aerial vehicle pneumatic structure reduced-order analysis model comprises a pneumatic reduced-order model and a structure reduced-order model. The aerodynamic structure order reduction analysis process comprises the steps that an aerodynamic order reduction model and a structure order reduction model are initialized; under the given calculation working condition, the aerodynamic load acting on the intelligent unmanned aerial vehicle structure is obtained through calculation of the aerodynamic reduced-order model; transmitting the load on the pneumatic grid to the structural grid through a force interpolation algorithm; solving deformation response by the structure order reduction model under the action of aerodynamic load; the structural deformation is fed back to the pneumatic grid through displacement interpolation, and the pneumatic configuration is updated; and performing iterative calculation until a convergence criterion is met, finally obtaining a pneumatic structure analysis result in an equilibrium state, and outputting a pneumatic coefficient and structural deformation and stress. According to the method, the CFD / CSD model is replaced by the equivalent model, so that the calculation efficiency is remarkably improved on the premise of ensuring the calculation precision.

The invention discloses a modeling method and system for a vehicle network field circuit coupling model under a contact line short-circuit working condition, and relates to the technical field of modeling, and the method comprises the following steps: constructing a short-circuit arc equivalent model under the contact line short-circuit working condition based on an isolation switch equivalent model, one end of the short-circuit arc equivalent model is connected with a contact line in sliding connection with a pantograph in the chain type lumped tau-shaped network model through a switch element, the other end of the short-circuit arc equivalent model is connected with a steel rail in the chain type lumped tau-shaped network model, and a vehicle network circuit model under the contact line short-circuit working condition is obtained; and taking the short-circuit arc current at any short-circuit phase obtained through simulation of the vehicle network circuit model as a current excitation source of the three-dimensional model, and obtaining a vehicle network field model under the contact line short-circuit working condition. The rise rate, peak value and attenuation process of the short-circuit current can be accurately simulated by adding the short-circuit arc, the arc voltage drop is reflected, and the authenticity and practicability of simulation are remarkably improved.

The invention discloses an electromagnetic transducer modeling and dynamic distribution parameter confirmation method considering electro-magnetic-mechanical-acoustic coupling. The method comprises the following steps: constructing a dynamic multi-physical field distribution parameter model DPM of an electromagnetic transducer system; a PGA model optimization method based on a parallel genetic algorithm; the dynamic multi-physical field distribution parameter model DPM comprises the following steps: constructing an excitation loop equivalent model, wherein the excitation loop equivalent model comprises a plurality of excitation main loop units, a plurality of air gap magnetic flux leakage loop units and a plurality of permanent magnet loop units; and constructing a mechanical structure equivalent model, wherein the mechanical structure equivalent model comprises physical models such as a system radiation panel, a spring system and a rubber panel. According to the method, parameters of the DPM are optimized through the PGA algorithm, the performance efficiency of the electromagnetic transducer is improved, and a new method is provided for design of the electromagnetic transducer.

The embodiment of the invention provides an equivalent model design method and system for an unmanned aerial vehicle carrying mission load flight test, and the method comprises the steps: obtaining mission load demand parameters and test condition parameters, the demand parameters comprise a long side A1 and a short side A2 of a rectangular airspace, A1 > = A2, and a demand speed v0; the test parameters comprise a test airspace long side B1 and a test airspace short side B2, B1 is greater than or equal to B2, the test machine minimum speed v1 and the test machine maximum speed v2, and v2 is greater than or equal to v1; when A1 < = B1, A2 < = B2 and v1 < = v0 < = v2 are not satisfied, calculating an equivalent coefficient p, and if the airspace condition A1 < = B1 and A2 < = B2 are not satisfied, calculating and determining the equivalent coefficient p; if the airspace condition A1 < = B1 and A2 < = B2 are satisfied, but the speed v1 < = v0 < = v2 is not satisfied, determining an equivalent coefficient p; based on the reference point coordinates and the equivalent coefficient p, longitude and latitude are achieved through geocentric coordinate system conversion, and horizontal navigational speed mapping is carried out. According to the technical scheme, by simulating the flight profile required by the mission load, the problem that the unmanned aerial vehicle cannot fly out of the flight profile required by the mission load in a flight test carrying the mission load can be solved.

The invention discloses a wind power plant network following / constructing type fan proportion optimization configuration method and device, a medium and a product, and belongs to the technical field of new energy power system stability control, and the method comprises the steps: collecting the operation data of a wind power plant and a power grid, and carrying out the standardization preprocessing; constructing a typical operation scene set based on the preprocessed data; establishing an equivalent model of a following network type fan and a construction network type fan and a coupling model with a power grid; constructing a frequency, voltage and transient stability index system based on the coupling model; designing constraint conditions containing stability indexes; constructing a multi-objective optimization function with stability priority; solving by adopting a global optimization algorithm to obtain an optimal fan proportion solution set; and performing simulation verification and scheme screening on the optimal solution set, and determining a final configuration proportion. On the premise of ensuring the stability of the power grid, the proportion of different types of fans in the wind power plant is scientifically configured, and the safe and stable operation capability of a high-proportion new energy power system is effectively improved.

The invention relates to the technical field of wind power generation, and discloses a wind power plant clustering method based on transient and steady-state rotating speed data, which comprises the following steps: collecting dynamic data based on fault time sequence key nodes, and extracting five-dimensional feature vectors of transient and steady-state rotating speeds of a doubly-fed wind generator as clustering indexes; noise data is adaptively separated and classified through a density clustering algorithm, and abnormal value interference is eliminated; the homogeneous units are clustered and combined into an equivalent model in combination with a hierarchical modeling strategy, and a detailed model is reserved for heterogeneous units; dynamically fusing multi-dimensional parameters by adopting a capacity weighting method, a wind energy conservation principle and a power weight, calculating equivalent generator, transformer, wind speed and system parameters, and evaluating and optimizing model precision through errors; according to the method, the problems of insufficient dynamic response characterization, abnormal value sensitivity and parameter coupling deficiency in a traditional method are solved, and the simulation precision of a wind power plant equivalent model and the engineering applicability of interaction analysis of a power system are remarkably improved.

The invention relates to a rapid estimation method and device for MMC loss in an electromagnetic transient model, and a medium. The method comprises the following steps: S1, constructing a Thevenin equivalent model of an MMC; s2, on the basis of an MMC Thevenin equivalent model, discretizing a sub-module capacitor based on a numerical integration method to establish an on-state loss model of the sub-module; s3, correcting to obtain the turn-on loss and turn-off loss of the IGBT and the reverse recovery loss of the diode; s4, in one simulation step, on-state loss is obtained through calculation based on an on-state loss model, the total switching frequency is obtained through calculation according to port data of the Thevenin equivalent model, and switching loss is obtained through combination of on-state loss and off-state loss of an IGBT and reverse recovery loss and switching frequency of a diode; and S5, taking the sum of the on-state loss and the switching loss as total loss. Compared with the prior art, the method has the advantages that real-time updating in the simulation step can be realized, the calculation complexity is controllable, and the overhead is remarkably reduced while the engineering precision is ensured.

The invention discloses an interface method for a VSC direct current system mixed granularity model and an alternating current system electromechanical transient model. The method comprises the steps that a mixed granularity simulation framework is constructed, wherein an electromechanical transient phasor model is adopted on the alternating current side, and a simplified electromagnetic transient instantaneous value model considering electromagnetic characteristics is adopted on the direct current side; the VSC converter adopts a unified equivalent model, and various types of converters are adapted through parameter configuration; a low-voltage side bus of the converter transformer is arranged at the interface position of the simulation framework and the alternating current system; simulation and interaction rules are configured, wherein the simulation step length of each direct-current power grid is independently set; the alternating current system provides port voltage and alternating current control information for the simulation framework, the simulation framework is equivalent to the alternating current system as a power source, and power exchange is realized through the converter station; in one time step calculation of the electromechanical transient state, the simulation framework changes along with the alternating current side information, a historical simulation state is taken back, and direct current side simulation in the alternating current time step is carried out again until the power interaction deviation converges.

The invention discloses a load storage charging and discharging integrated power grid stability simulation analysis method and system, and belongs to the technical field of simulation analysis, and the method comprises the steps: obtaining power grid operation data and resource state data; constructing a load storage charging and discharging resource unified equivalent model containing self-adaptive virtual inertia and self-adaptive transient damping; power grid transient stability simulation is executed, and transient response data are generated; processing the response data, and calculating to obtain a multi-dimensional transient stability comprehensive index fusing the oscillation damping ratio and the voltage deviation integral; and iteratively adjusting the virtual inertia and the transient damping parameter according to the comprehensive index until an optimization condition is met, and generating an optimization control strategy. According to the method, the load storage charging and discharging heterogeneous resources are aggregated into the unified equivalent model, parameter optimization is guided through the transient stability comprehensive index, the grid-connected stability of the high-permeability power electronic equipment can be accurately evaluated and optimized, and the transient reliability and operation safety of a power grid when the power grid is subjected to fault disturbance are improved.

The invention discloses an equivalent dielectric parameter calculation method for a truss type structure, and belongs to the technical field of electronic science. The method solves the problem that an existing equivalent medium theory cannot directly perform equivalent calculation on a truss structure model, constructs a general expression from the equivalent medium theory, can improve the calculation universality and portability, considers the influence of material composition and structure on equivalent dielectric parameters, and improves the calculation accuracy. A precise tool is provided for analyzing electromagnetic behaviors, undetermined indexes are discretized in an interval range at equal intervals, processing and analysis can be facilitated, a scattering result data set of an equivalent model corresponding to each discrete index can be calculated, comparison data can be accumulated, a typical actual model can be established, and a scattering result is calculated by adopting an area integral equation method. According to the method, data can be ensured to be close to reality and reliable, accurate parameters are determined through fitting, equivalent conversion from a complex truss structure to a simple homogeneous medium model is achieved, and main electromagnetic characteristics of an original structure can be reserved while the complexity of the model is simplified.

The invention relates to a hybrid optimization method for dynamic response of a valve element of a CDC electromagnetic valve, and belongs to the technical field of automobile suspensions. The method comprises the following steps: (1) establishing a three-dimensional equivalent model of the CDC electromagnetic valve; (2) building a CDC electromagnetic valve system throttling principle model, determining an oil path, building the valve system throttling principle model by using fluid mechanics, and determining a pressure flow relation of each valve system; (3) building a stress model of the pilot valve and the main valve core; (4) selecting target optimization structure parameters; (5) constructing hypercube mapping and generating an initial population; (6) carrying out dual-core coevolution to carry out main circulation; (7) judging whether a termination condition is met or not; and (8) outputting a result. According to the method, through a dual-core collaborative architecture and an adaptive search mechanism, the inherent defect that the exploration breadth and the development depth are difficult to consider in a traditional method is effectively overcome, and the optimal solution is quickly and accurately searched in a global range.

The application provides a multi-objective robust optimization method, system, storage medium and electronic equipment for production task planning of a multi-agent collaborative platform, and relates to the technical field of production task planning of a multi-agent collaborative platform. First, according to the production task planning resources of the multi-agent collaborative platform and a single-batch overseas order, a production task planning model with a manufacturing enterprise agent as the core is constructed under the premise of determining the sea transportation time. Then, an infinity norm ball uncertain set is designed for the sea transportation time of a large ship, a robust quadratic multi-objective model for cross-regional multi-agent production task planning is constructed, and the total delivery time deviation and total delivery cost multi-objective of the single-batch overseas order are optimized. The model considers the sea transportation plan prepared in advance by a shipping company agent and the long and uncertain sea transportation time. In addition, the model is converted into an equivalent model, a two-stage hybrid heuristic algorithm is designed for solving, and a reasonable and feasible production task planning suggestion is given for the single-batch overseas order.

The invention discloses a generalized energy storage equivalence model construction method based on multi-type micro-grid mapping, and relates to the technical field of energy storage model construction, and the method comprises the steps: dividing an energy storage unit into a plurality of equivalence model candidate structures through a graph neural network model based on an electrical topological graph and a node state of an energy storage system; model parameters are quickly initialized and calibrated online based on meta learning; deep reinforcement learning dynamic decision structure switching and parameter optimization are introduced; and adopting Monte Carlo Dropout to evaluate the parameter confidence and trigger model rollback, and outputting a final energy storage equivalent model. According to the method, the accuracy and robustness of the model under the dynamic working condition are improved, the uncertainty in the modeling process can be sensed in real time, rollback correction is actively carried out, the reliability and engineering availability of model output are ensured, and the method is particularly suitable for energy storage system modeling and control scenes with high requirements for the response speed, the adaptive capacity and the operation stability.

The invention relates to a harmonic stability analysis method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring equipment data of a target inverter and system operation data of a power system; the target inverter comprises a network-following type inverter and a network-constructing type inverter, and the system operation data comprises power transmission line parameters and system topology data; constructing each equivalent model in the power system based on the equipment data of the target inverter and the parameters of the power transmission line; processing each equivalent model according to system topology data to obtain a node admittance matrix, and determining a target inherent mode corresponding to the power system based on the node admittance matrix and variable parameters of the power system; and evaluating the power system based on the attenuation coefficient of the target inherent mode to obtain an evaluation result corresponding to the harmonic stability of the power system. By adopting the method, a complex power system can be simplified, the harmonic stability of the system is quantified, the change trend of the harmonic of the system is directly judged, and the accuracy is improved.

The invention discloses a decoupling cell-hybrid equivalent model and a permanent magnet flat wire motor multi-physical field cooperation rapid optimization method, a rotor and a stator are modeled separately, and complete separation of a motor topological structure and an analysis grid is realized at the rotor part through decoupling cells, so that the motor topological structure can be completely separated from the analysis grid when facing various different rotor topological structures. And a new grid structure does not need to be repeatedly constructed, so that the modeling efficiency, the model universality and the modeling flexibility of a complex structure are greatly improved. And the stator adopts hybrid equivalent modeling, so that the solving complexity is remarkably reduced while the high calculation precision is kept. The rotor side adopts boundary encryption subdivision to ensure stress precision, and the stator side adopts a parameterized equivalent magnetocaloric network model to reduce analysis time consumption, and unification of high precision and high efficiency is realized. By means of an NSGA-II algorithm, a bidirectional coupling calculation framework among an electromagnetic field, a temperature field and a stress field is constructed, efficient coupling iteration among physical quantities of the three fields is achieved through coupling calculation, and coupling prediction precision and design reliability are effectively improved.

The invention discloses a wind power plant equivalent modeling method, a wind power plant equivalent modeling system and wind power plant equivalent modeling equipment for electromagnetic transient simulation, and particularly relates to the technical field of electromagnetic transient simulation. The wind power equipment measurement information is coded and decoded through the equipment state space mapping model to obtain a system matrix representing the dynamic characteristics of a fan; obtaining a multi-dimensional characteristic value of the system matrix, and dividing the wind power generation sets of the wind power plant according to a pre-constructed grouping rule through a clustering algorithm in combination with the multi-dimensional characteristic value to obtain a plurality of wind power equipment clusters; constructing a wind power plant equivalent model based on wind turbine generator port measurement data of each wind power equipment cluster in combination with an Autoformer neural network; and constructing an interface model for accessing the equivalent model of the wind power plant to the Cloud PSS platform by utilizing the Cloud PSS platform.

The invention discloses a wind power plant electromagnetic transient equivalence method and system oriented to power grid stability control strategy verification. The method comprises the steps that the rotating speed and wind speed correlation characteristics of electromagnetic transient models of all wind turbine generators in a wind power plant, the networking form of the wind turbine generators in the wind power plant and the operation working condition of all the wind turbine generators before a fault are obtained; all wind turbine generators in a wind power plant are divided into three initial groups including a starting area, an MPPT area and a constant-rotating-speed constant-power area; the grouping of the starting area and the constant rotating speed and constant power area is kept unchanged, the wind turbine generator in the MPPT area is further subdivided into three subgroups, and a wind power plant equivalent model containing five subgroups is formed; calculating the equivalent wind speed and multiplication value of the grouped wind turbine generator, and calculating the equivalent parameter of the current collection line of the wind power plant; performing multi-scene and multi-working-condition test verification on the established wind power plant equivalent model; according to the method, the transient response precision is improved while the simulation efficiency is ensured, and the contradiction problem of insufficient equivalent precision of a traditional single machine and large calculation amount of a detailed model is effectively solved.

The invention discloses a wind power plant equivalent modeling method and device, electronic equipment and a storage medium, and the method comprises the steps: dividing wind turbine generators in a wind power plant into a plurality of unit clusters, and generating an equivalent impedance parameter of each cluster through a pre-trained parameter generation network; compared with a traditional single-machine multiplication equivalent model, the multi-machine multiplication equivalent model has the advantages that the dynamic response of the equivalent model in a resonance frequency band can be kept consistent with that of an actual model; according to the method, the equivalent impedance parameter is dynamically estimated according to the average output of each cluster by adopting the pre-trained parameter generation network, and the nonlinear mapping relation between the cluster output and the equivalent impedance is established, so that the dynamic response of an equivalent model in a resonance frequency band is highly consistent with that of a detailed model, and the dependence on manual calculation or complex equivalent derivation is avoided; the automation degree and the cross-project generalization ability of the modeling process are improved, and the method is particularly suitable for the rapid modeling requirements of large-scale and multi-type wind power plants.

The invention discloses a series-parallel resonance characteristic evaluation method and system, and belongs to the technical field of distributed new energy grid-connected power generation, and the method comprises the steps: analyzing the interaction between all units of a microgrid system based on a transfer function method; the method comprises the following steps: performing series resonance modal analysis and parallel resonance modal analysis on a micro-grid system by using a modal analysis method, and constructing a modal analysis equivalent model; extracting resonance modal information according to the modal analysis equivalent model; a resonance center is positioned based on series-parallel modal analysis, resonance types are distinguished in combination with a transfer function method, and resonance characteristic evaluation is realized. According to the method, the resonance type and the resonance center of the micro-grid system can be accurately obtained in the island operation mode, key information such as the key resonance mode and the node participation factor is extracted, and a theoretical basis is provided for subsequent resonance suppression.

This invention provides a method for constructing a stiffness equivalent model of a porous laminated structural member, including: S1, obtaining the unit cell characteristic size parameters of the pores on the laminates; S2, constructing a unit cell solid model of the laminates; S3, constructing a unit cell solid finite element analysis model of the laminates; S4, preprocessing the unit cell solid finite element analysis model; S5, calculating the stiffness equivalent modulus of the laminates at different temperatures; S6, repeating steps S1 to S5 to calculate the stiffness equivalent modulus of all laminates in the porous laminated structural member in each direction at different temperatures; S7, performing integrated boundary processing on the stiffness equivalent modulus calculated in step S6 to construct the stiffness equivalent model of the porous laminated structural member. This method can simplify porous laminated structural members into non-porous laminated structural models, effectively reflecting the mechanical properties of porous laminated structural members, while significantly improving computational efficiency and accuracy, and has broad engineering application prospects.

This invention discloses a dynamic overload detection and protection method for servo motors based on a thermal accumulation model, relating to the field of servo system fault protection application technology. The method includes constructing an equivalent thermal accumulation model, dynamically detecting overload states, executing heat dissipation recovery strategies, implementing multi-level protection mechanisms, adaptive environmental compensation, and historical data learning functions. By discretizing overload curve data and employing nonlinear accelerated calculation strategies, it avoids the protection lag and false triggering problems caused by traditional single-parameter detection, ensuring timely response of the motor under light load, heavy load, and load fluctuation scenarios, reducing the risk of motor burnout. By integrating an ambient temperature sensor and a heat dissipation condition evaluation unit, it dynamically adjusts the thermal accumulation coefficient and heat dissipation attenuation parameters to solve the model deviation problem caused by environmental interference. When heat dissipation deterioration and abnormal temperature feedback are detected, it automatically extends the heat dissipation recovery cycle and corrects the calculation logic, improving the continuous operational reliability of the system.

The application relates to the technical field of power electronics, and discloses a press-contact type IGBT device packaging structure optimization method and system. The method comprises the following steps: constructing an equivalent model of a press-contact type IGBT device; constructing a differential algebraic equation for uniformly describing the equivalent model of the press-contact type IGBT device and circuit port variables; converting the differential algebraic equation into a nonlinear algebraic equation group through time domain discretization, and constructing an iteration matrix with a global state vector as a derivation object according to a solving mode of the nonlinear algebraic equation group; performing low-dimensional subspace projection on the iteration matrix based on a Krylov subspace, and combining residual minimization to solve a linear subproblem of the iteration matrix, so that current uniformity characteristic results of the press-contact type IGBT device are obtained; and the packaging structure of the press-contact type IGBT device is optimized based on current density distribution reflected by the current uniformity characteristic results. The application can improve the current uniformity and operation reliability of the system.