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Analysis of Chaos Characteristics and Control Research Based on Intermediate Frequency Generator Units

Author: LuGuoNing
Tutor: ZhangHuaGuang
School: Northeastern University
Course: Proceedings of the
Keywords: Excitation Controller Synchronous chopper circuit Chaos Branch Discrete mapping model Chaos Control
CLC: TM31
Type: Master's thesis
Year: 2008
Downloads: 28
Quote: 1
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Abstract


IF generator has a very important use in a variety of power generation system, either directly as frequency power supply, they can be rectified as DC power, but also in large-scale power generation system as the excitation power. The advantage of the intermediate frequency generator can be used as a portable, high-performance power for a variety of special circumstances, under the special conditions of the electricity system to provide high-performance, stable and reliable electricity energy. Excitation Controller is an important part of the generator sets, has an important impact on their safety and stable operation. Therefore the generator exciter research is the key issue of the IF generator power technology development. This thesis is based on the joint development of Northeastern University and a CASC IF generator excitation controller for a research basis points, in dsPIC30F6010A as the control chip, designed for 75kW intermediate frequency generator excitation controller based on synchronized chopping technique. Excitation Controller of excitation circuit using a new excitation mode, the synchronous chopper circuit MOSFET switch tube in place the traditional thyristor excitation circuit, combined with the IF generator sets dsPIC30F6010A can better control and stable operation. The synchronous chopper circuit is strongly nonlinear circuit system, has rich dynamic behavior. Chaos phenomenon under certain parameter conditions. Synchronous chopper circuit as a main circuit of the exciter field winding excitation current, its stability is very important for the stability of the generator set. So chaotic phenomena of nonlinear circuit system analysis and research is very important, as well as better the behavior of power electronic circuits insight into convenient for engineering design. This paper completed the following aspects: 1. The IF Excitation overall program through the study of the characteristics of the IF generator sets run. 2 dsPIC30F6010A core controller AC sampling technology, designed to control the excitation controller of generator excitation current synchronous chopper circuit. 3 synchronous chopper circuit as the research object, respectively, to establish a continuous state space equation model and discrete iterative mapping model, its simulation study, draw the bifurcation diagram reveals its bifurcation under certain conditions and chaotic behavior. The Jacobi matrix stability analysis is completely consistent with the results of the simulation. 4. Research in the characteristics of the chaotic state of synchronous chopper circuit, respectively, using the parameter perturbation method and delay feedback control law of the the synchronous chopper circuit Chaos Control. Analysis, comparing the characteristics of each control method and control effect.

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CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,)
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