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The linearized model of single-machine infinite-bus power system integrated with DFIG is derived. According to the linearized model, the figure of Phillips-Heffron model can be drawn. For single machine infinite bus system with DFIG integrated, the damping torque of electromechanical circuit of synchronous generator(SG) comes from two parts: one part is synchronous generator's excitation winding and...
A symmetrical test structure for the measurement of vias in multi-layer package substrate was put forward in this paper. Based on the known S-parameters of this designed symmetrical structure and the deduced expressions, an indirect method to get the actual S-parameters of a single via was presented. In order to verify the validity of the proposed method, the simulation models were built in Power...
In this paper, a new extraction method for the dielectric constant of PCB material is proposed, which is based on S-parameter inversion method. The calculation process is detailed and an application example is given. According to the simulated S-parameters, while with the proposed method, the applicable frequency ranges of a set of published expressions for microstrip lines are obtained. With the...
In this paper, a chilled water storage reconstruction program and its running strategy were proposed combining with the result of energy efficiency test on a building central air conditioning system, and compared operation cost before and after the reconstruction under the running condition and cooling load during test. The analysis results showed that the implementation of this reconstruction program...
In this paper, the theories of genetic algorithm (GA) and back propagation (BP) algorithm are introduced. For the purpose of overcoming the disadvantages of standard BP algorithm, such as local optimum and low convergence speed, the paper adopts genetic algorithm optimizing BP neural network for training. By analyzing computer stimulation results and comparing with traditional blind equalization algorithm,...
In order to overcome the shortcomings of standard BP algorithm, such as low convergence speed and local optimum, since GA is a random searching method with global characteristics, the paper adopts GA to NN training. By analyzing results of an example, the essay draws conclusion that the equalization effect of GA-NN has been greatly improved, convergence process has also been quickened, besides that...
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