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There are more and more converter transformers, bushings, smoothing reactors use epoxy resin or epoxy/insulating paper composite materials as the main insulating medium, in the UHVDC transmission projects. In practice, there are many interfaces between epoxy and insulating paper exist in paper/paper insulation system. Compared with epoxy resin, there are a lot of traps in paper. The structure of the...
In order to improve lack of GA, we combined it with case-based reasoning(CBR) and constructing non-isomorphic layout pattern (NILP) to solve layout problem in this paper. Its basic idea includes 2 components: (1) initial population of GA consists of reasoning solutions of current layout problem attained from case database, their NILP solutions and random solutions; (2) For every generation of optimization,...
Epoxy resin has been widely used in dry-type insulation application such as DC dry-type bushings. In practice, DC dry-type bushings work not only under DC voltage, but also under multiple harmonics with 50Hz fundamental frequency. This study focuses on the effects of space charge behavior of epoxy resin on real voltage of DC dry-type bushings. By using Fourier decomposition, the real voltage of DC...
Analyzing the current developing status and actual problems of radar system simulation, based on continuous system simulation, combining signal simulation and function simulation, considering current development of simulation technique and the request of air battle to EW, the simulation system of Phased Array radar based on MATLAB/SIMULINK is presented and designed, which conquered the contradiction...
Corrosion monitoring is a persistent problem relating to materials degradation. Modern plants have a need to predict and measure materials degradation due to corrosion during early stages and preferably on-line. So an overview of on-line electrochemical corrosion monitoring techniques is provided. The methods used in this study were: linear polarization resistance (LPR), electrochemical impedance...
The layout problem of weighted circles is a class of layout optimization problems with behavior constraints. Aiming at this NP-hard problem, this paper puts forward a fast heuristic ant colony approach(FHACA). This approach obtains the heuristic information from weighted matrix and uses it to construct the better ants and design parameters of ant colony optimization. The layout schemes of some ants...
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