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The operation control for many complex industrial processes consists of two layer — loop control layer and operational control layer. The former aims at achieving the required loop control for each production unit along production line whilst the later optimizes the set-points to the control loops so that certain performance indexes (such as product quality and energy cost) is optimized when the closed...
Simulation model of micro-grid including a direct-drive wind power generation, two sets of power-controlled distributed generations (DGs) and a three-phase fault module was investigated in Matlab/simulink. Based on the constructed model, the operating process switched from island mode to grid-connected mode was simulated and the voltage variance signal was detected with Daubechies(Db) wavelet. The...
Some problems, such as high energy consumption, short life and high frequency maintenance, exist in reverberatory furnace which is the key equipment for production of reclaimed copper. Measurement data for energy balance indicate the major reasons are incomplete combustion and too high temperature at some location. In this paper, the coupling numerical simulation on fluid flow, heat transfer and combustion...
The water-collecting box (WCB) of conventional submarine exhaust system can prevent the reversed flow. The gas within the WCB is divided by the clapboard and a sheaf of pipes into several sections, which can get an effective heat transfer with the internal wall. After the heat transfer, the temperature of exhaust gas decreases a little. Several numerical models with different structure were established...
An overlapping domain decomposition method (DDM) and finite element method (FEM)/boundary element method (BEM) are combined to compute the scattering property of two dimensional anisotropic dielectric cylinder. The boundary element method is used to analyze the field external to the cylinder. The domain of dielectric cylinder is divided into several subdomains and the finite element method is applied...
The conventional symmetrical components fault analysis method may not be practically feasible in case of the analysis of simultaneous faults, especially in inherently unbalanced power systems because of the difficulties encountered in the assembly of sequence networks and their solution. To alleviate these problems, this paper presents a new algorithm for computer which is suitable for analyzing arbitrary...
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