开关型功率放大器缓冲电路的多目标优化设计  

Multiobjective Optimization Design of Snubbers for Switching Power Amplifier

作　　者：孙晓明[1,2] 高孟平[3] 刘涤尘[2] 王静[2] 向农[2] 袁荣湘[2] 

机构地区：[1]云南电网公司博士后科研工作站,昆明650217 [2]武汉大学电气工程学院,武汉430072 [3]云南电力调度中心,昆明650011

出　　处：《电力系统及其自动化学报》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)

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.

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 

分 类 号：TM464[电气工程—电器]