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《Proceedings of the Chinese Society of Universities for Electric Power System and its Automation》 2011-01
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Multiobjective Optimization Design of Snubbers for Switching Power Amplifier

SUN Xiao-ming1,2,GAO Meng-ping3,LIU Di-chen2,WANG Jing2, XIANG Nong2,YUAN Rong-xiang2(1.Postdoctoral Scientific Research Institution of Yunnan Power Grid Corporation, Kunming 650217,China; 2.School of Electrical Engineering,Wuhan University,Wuhan 430072,China; 3.Yunnan Electric Dispatch Center,Kunming 650011,China)  
The type selection,principle and optimization design of snubber circuit for switching power amplifier(SPA)were studied in the paper.Based on the principle analysis,the task of snubber circuit design was summarized as solving a multi-objective optimization problem(MOP)with 3 objective functions.Non-dominated sorting genetic algorithm-Ⅱ(NSGA-Ⅱ),known as the most effective mthod for solving the MOPs at present,was chosen to solve above MOP.In order to make the solving procedure more efficient,4 schemes,i.e.the pre-accelerating crowding distance assignment(PACDA),the reproduction without duplicates(RWD),the pointers grouping fast non-dominated sort(PGFNS)and the chaotic factor based middle recombination(CFBMR),were introduced to modify the NSGA-Ⅱ and the modified NSGA-Ⅱ(MNS GA-Ⅱ)was proposed.Simulation shows that MNSGA-Ⅱ is more effective and speedier than NSGA-Ⅱ;and experiment demonstrates that with the optimal parameters sought out by MNSGA-Ⅱ,the snubber circuit will achieve desired goals.
【Fund】: 国家自然科学基金资助项目(50677046)
【CateGory Index】: TN722.75
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