3results about How to "Solving Convergence Problems" patented technology

This invention relates to the field of force-electromagnetic coupling measurement, and discloses a method and system for the internal arrangement of a low-voltage power metering box based on a modular transformer plug-in structure. This method deploys multi-source sensors to synchronously collect time-series data on the magnetic flux density of the three-phase modules, the strain field of the base, and the preload. A directed weighted hypergraph is constructed to represent the magnetoelastic coupling topology, which is then converted into a time-varying creep rate matrix using a viscoelastic creep memory operator. Combined with phase space partitioning and a magnetostrictive response tree generation compensation strategy, the final result is an inverse mapping to an optimized scheme for module spacing and interface stiffness. This invention solves the problem of time-varying coupling drift caused by structure-electromagnetic coupling and viscoelastic memory effects in modular transformers by accurately capturing the time-varying mechanical laws of the strain field and preload, overcoming the limitations of traditional static independent calibration, and achieving long-term stability of three-phase metering accuracy.

The invention relates to the technical field of power system optimization operation, and discloses a multi-target wind-light-hybrid pumping storage-storage day-ahead coordination optimization method. By taking the maximum generating capacity and the minimum residual load range of the system as objective functions, constructing a multi-objective optimization model including hybrid pumped storage hydropower station operation constraint, energy storage power station operation constraint, direct current delivery channel constraint, wind and light output constraint and demand response constraint; and based on the multi-objective optimization model, solving by adopting an improved NBI method to obtain a pareto solution set. And solving the multi-objective optimization models established in the steps 1 and 2 by using mature optimization software in combination with an improved NBI method. According to the method provided by the invention, the economical efficiency and flexibility requirements of the system are considered at the same time, the hydroelectric generating set is ensured to avoid a low-efficiency vibration area, the flexible adjustment capability of a source load side and a channel is fully excavated, and the new energy consumption capability of the system is improved.

The invention belongs to the related technical field of engineering mechanics and materials, and discloses a material multi-section linear plastic hardening model construction and implementation method based on near-field dynamics, which is used for effectively solving a nonlinear hardening behavior of a material. The method comprises the following steps: constructing a near-field dynamics initial numerical discrete model; setting boundary conditions needing to be applied to the initial numerical discrete model; calculating a current configuration parameter of the Nth time step; constructing a multi-section linear plastic hardening model parameter matrix; constructing a yield judgment criterion; the yield state is judged on the basis of the multi-section linear plastic hardening model parameter matrix and the yield judgment criterion; calculating equivalent plastic strain increment according to the yield state; and updating a near-field dynamic force density vector and a plastic correlation quantity according to the equivalent plastic strain increment. According to the method, on the premise that the precision is guaranteed, the calculation efficiency of the near-field dynamic elastoplasticity problem is remarkably improved, and calculation obstacles are cleared away for applying high-precision fracture mechanical analysis to a large-scale engineering structure.