5results about How to "Avoid emulation" patented technology

The invention belongs to the technical field of reliability-based design optimization, and particularly relates to a reliability design optimization method combining transfer learning and a physical information neural network. Comprising the following steps: constructing a physical information neural network model by adopting training data of a source domain, and evaluating the reliability of the source domain. A physical information neural network model constructed by adopting training data of a source domain is updated by utilizing a layer freezing and fine tuning technology in transfer learning, so that the reliability of a target domain with different statistical attributes is evaluated, the calculation overhead is saved, and the calculation efficiency is improved. A first-order scoring function is utilized to carry out random sensitivity analysis on the failure probability so as to ensure normal operation of design optimization. And finally, providing estimation reliability, an objective function value and corresponding sensitivity information for an optimizer to obtain a corresponding updated design point. And repeating the iterative design process until the optimal design is realized. The training speed of the physical information neural network model is increased, and the precision of the physical information neural network model is improved.

The invention relates to a method for modeling a photovoltaic power station for relay protection by using fault recording data. The method comprises the following steps: step 1, acquiring a fault recording file by a fault recording analysis system; 2, processing voltage and current data based on the fault recording file obtained in the step 1, and then calculating the short-circuit current of the photovoltaic power station; 3, obtaining a latest short circuit calculation model based on the voltage and current data processed in the step 2, and obtaining a final short circuit calculation model through multiple times of model correction; and 4, performing short-circuit calculation by using the short-circuit calculation model corrected in the step 3. According to the invention, simulation and actual short-circuit tests can be avoided.

A pipeline equivalent circuit model considering the axial diffusion effect of fluid belongs to the technical field of time domain simulation of an integrated energy system, and is composed of an equivalent circuit model for simulating two sections of water pipes with different lengths; the first section of water pipe is divided into N units with the same length, and the equivalent circuit model for simulating each unit is composed of a branch containing a variable resistor and five branches connected in parallel; the equivalent circuit model for simulating the second section of water pipe and the equivalent circuit model for simulating each unit in the first section of water pipe have the same topological structure, and the equivalent circuit model for simulating the second section of water pipe and the equivalent circuit model for simulating each unit in the first section of water pipe are connected in series to obtain the pipeline equivalent circuit model. The thermal dynamic process of the liquid in the water pipe can be simulated, joint simulation and analysis of a comprehensive energy system covering electric power and thermal power are achieved in the same simulation environment, the simulation precision and efficiency are improved, and the simulation calculation amount is reduced.

The invention discloses an RISC-V processor verification method and system and a storage medium. The method comprises the following steps: monitoring version change of a register transfer level hardware circuit code of the RISC-V processor to establish a change influence domain; and constructing an inter-module relationship graph according to the change influence domain, and positioning a verification scene based on the inter-module relationship graph. And generating a test case in the verification scene, and performing RISC-V processor verification according to the test case. The modification points in iterative development are determined based on the version evolution trajectory, and the change influence domain is established according to the modification points, so that a basis is provided for limiting a verification scene; and a clear boundary is provided for the generation of the test case through the establishment of the verification scene, so that the problem of fuzzy verification range in the development iteration of the processor is effectively solved, the consumption of test resources is greatly reduced, the full-chip simulation is avoided, the feedback period is shortened, the verification efficiency is improved, and a reliable guarantee is provided for the rapid iterative optimization of the processor.

This invention discloses an active support configuration method and equipment for urban power hollowing-out areas, comprising: based on typical urban power hollowing-out scenarios, comprehensively screening the requirements of typical scenarios, combining the characteristics of the equipment's VSC converter, and proposing an active support integrated solution through VSC control strategy improvement and reactive power system coordinated control. Based on the N-1 and N-2 stability results of a single fault scan, the installation site is calculated and the optimal site is selected for installation through local topology network characteristics, featuring simplicity, speed, efficiency, and economy. This method is applicable to urban power hollowing-out scenarios in the construction of new power systems in China, urban power grids with low short-circuit ratios, coastal urban power grids with large-scale renewable energy access, and receiving-end urban power grids with dense DC access, thus having a wide range of applications. The optimal site selection based on the grid topology, combined with functional integration using VSC characteristics, is more intensive and economical than conventional solutions.