7results about How to "Meet Simulation Needs" patented technology

The present application relates to the technical field of power system stability control simulation analysis, and provides a transient simulation analysis and decision method, device and equipment for power grid harmonic oscillation, which comprises the following steps: combining the model and model parameters of electromagnetic transient offline simulation with the topology of the power grid to be analyzed to obtain an electromagnetic transient example, and then describing the calculation process of electromagnetic transient with a hierarchical directed acyclic graph, and taking each calculation model with redistributed resources as the electromagnetic transient algorithm; performing risk analysis on the harmonic oscillation condition according to the simulation result, and making an optimized decision on the harmonic oscillation suppression measures; through example design and electromagnetic transient algorithm design, an electromagnetic online simulation model is constructed to meet the simulation requirements of large power grids and realize the analysis and suppression decision of harmonic oscillation.

The application aims to provide a generation method and system of a fiber reinforced recycled concrete three-dimensional mesoscopic model based on Boolean operation, mainly considering the influence of the gradation, shape, replacement rate and old mortar content of recycled coarse aggregate and the influence of the shape, characteristic parameter and unit type of fiber. Meanwhile, the Boolean operation is used to perform collision test on the aggregate and fiber, to quickly generate a fiber reinforced recycled concrete three-dimensional mesoscopic random aggregate model, which can be effectively used to simulate the real damage characteristics of recycled concrete. The method comprises the following steps: step 1, generating a matrix under a given shape; step 2, generating coarse aggregate under a random shape and a given gradation; step 3, generating old mortar on the surface of the coarse aggregate to form recycled coarse aggregate; and step 4, generating fiber under a given shape, characteristic parameter and unit type.

The invention relates to the technical field of generator excitation simulation, and discloses an RT-LAB-based generator excitation small signal semi-physical simulation method and detection system, and the simulation method comprises the following steps: building a single machine infinite bus simulation system and a generator excitation system model in RT-LAB software; a semi-physical simulation platform loaded with RT-LAB software is electrically connected with the AVR excitation regulator through a conversion card; based on the generator excitation system model established in RT-LAB software, determining the optimal working parameters of the PSS of the AVR excitation regulator; and based on the optimal working parameters of the PSS of the AVR excitation regulator, adjusting the control parameters of the single-machine infinite-bus simulation system and the generator excitation system model so as to evaluate the response performance of the AVR to various generator faults. According to the method, a small signal model is built through RT-LAB, and the test accuracy is ensured by utilizing the real-time capability of the step length of 15 microseconds.

The invention relates to the technical field of seismic data processing, and particularly discloses a well-to-seismic joint modeling method and device suitable for wave equation numerical simulation, and the method comprises the steps: carrying out the extrapolation of well logging speed along horizon data, and forming depth domain three-dimensional speed body data; determining a depth interface fused by the logging speed and the seismic data; establishing a fusion coefficient at the depth interface along the depth direction on the basis of a Hanning window function; and based on the fusion coefficient, carrying out speed fusion to obtain a final fusion speed. According to the method, the velocity model capable of simulating underground geology and geophysical characteristics is established through well-seismic combination, the travel time characteristic of the seismic velocity and the stratum change characteristic of the logging velocity are fully utilized, the velocity model capable of meeting the wave equation numerical simulation requirement is formed, and support is provided for studying the propagation mechanism of some special seismic waves.

The invention discloses an automatic driving simulation track generation method, which comprises the steps of generating an action set for a vehicle track point set, and obtaining the vehicle track point set by downsampling original vehicle track data; on the basis of a word list generation algorithm, sub-action sets meeting distance conditions are selected from the action set, the sub-action sets are coded, a vocabulary set is generated, and the distance conditions include that the distance between any actions is not smaller than a preset threshold value; searching lexical elements corresponding to the target action and codes of the lexical elements in a vocabulary set; and inputting the lexical elements of the target action and the codes of the lexical elements into an autoregression model for track reconstruction to obtain simulation track points. According to the method, the efficient motion word list is generated by sampling a large amount of vehicle motion data for track simulation generation, so that the dynamic simulation degree of the model is improved.

A hierarchical parallel real-time simulation method for fast hybrid DC circuit breakers first constructs a small-step synthesis model of the submodules of the fast hybrid DCCB, and then builds a two-port equivalent model of the submodule based on the idea of ​​internal node contraction of the system, and then constructs a two-port equivalent model of the fast hybrid DCCB according to the connection relationship of the submodules. While ensuring accuracy, the small-step real-time simulation scale of the fast hybrid DCCB is greatly improved, and the simulation efficiency is improved.

The invention discloses a flexible direct-current electromagnetic transient modeling method. The method comprises the following steps: acquiring data information of a target flexible direct-current power system; carrying out modular modeling on the target flexible DC power system based on simulation software; modeling a structured controller of the target flexible DC power system based on simulation software; establishing an electromagnetic transient simulation model of the target flexible DC power system; performing simulation test and correction on the electromagnetic transient simulation model of the target flexible DC power system; and final flexible direct current electromagnetic transient modeling is completed according to a correction result. The invention also discloses a system for realizing the flexible direct current electromagnetic transient modeling method. According to the method, modular modeling and correction are carried out on each part of the target flexible direct-current power system, flexible direct-current electromagnetic transient modeling is realized, the simulation requirements of the power system in different stages such as planning, design and dispatching operation can be met, the reliability is higher, and the flexibility is better.