4results 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.