摘要
对开关型功率放大器(SPA)缓冲电路的选型、原理和优化设计进行研究。依据原理分析,缓冲电路的设计任务被归结为求解一具有3个目标函数的多目标优化问题(MOP)。该文选择了目前解决MOP最有效的Ⅱ型非支配排序遗传算法(NSGA-Ⅱ)对以上MOP进行求解。为使求解过程更加高效,该文通过引入带前加速的拥挤距离分配(PACDA)、无重串的繁殖(RWD)、指针分组快速非支配排序(PGFNS)和带混沌因子的中间重组(CFBMR)4个策略对NSGA-Ⅱ进行了改进,提出了改进的NSGA-Ⅱ(MNSGA-Ⅱ)。仿真实验表明,MNSGA-Ⅱ较之NSGA-Ⅱ更加有效和快速;而试验证明,由MNSGA-Ⅱ寻找到的缓冲电路的最优参数使设计充分达到了预期的目标。
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.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2011年第1期6-16,共11页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(50677046)
关键词
开关型功率放大器
缓冲电路
多目标优化问题
Ⅱ型非支配排序遗传算法
优化设计
switching power amplifier
snubber circuit
multi-objective optimization problem
non-dominated sorting genetic algorithm-Ⅱ
optimization design
