基于模糊免疫-单神经元PID控制单开关高增益直流变换器  

Single-switch High-gain DC-DC Converter Based on Fuzzy Immune-Single Neuron PID Control

作　　者：万陆峰 徐玉珍[1] 金涛[1] WAN Lufeng;CPSS;XU Yuzhen;JIN Tao(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学电气工程与自动化学院,福州350108

出　　处：《电源学报》2024年第6期13-24,共12页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51977039);校科研启动基金资助项目(2019-JJFDKY-24)。

摘　　要：针对1种无变压器、无耦合电感的新型单开关高增益变换器,通过将电压升举单元引入Boost变换器来实现在较小占空比情况下提高电压增益,降低开关管、二极管电压应力,减小开关管的导通损耗,从而提高变换器的效率。为了进一步提高变换器的动态性能与抗扰动能力,在分析单神经元控制器的基础上引入免疫反馈机制,研究模糊免疫-单神经元PID控制策略,将模糊免疫控制与单神经元智能控制器结合,实现了单神经元比例系数的自整定。最后,对所提变换器和控制策略进行了仿真研究,并设计了1台输出200V/0.5A的实验样机进行实验验证,仿真和实验结果均表明:所提变换器可在较小占空比情况下获得较高电压增益;与传统的PID控制策略相比,所提模糊免疫-单神经元PID控制策略能更有效地抑制系统扰动,提高变换器的动态性能,具有更强的自适应能力和鲁棒性。A novel single-switch high-gain converter with no transformers and no coupled inductors is studied in this paper.Since the voltage lifting unit is added to the Boost converter,the voltage gain of the converter is improved,the voltage stresses of the switch and diodes are reduced,and the conduction loss of the switch is reduced under the condition of a small duty cycle.As a result,the efficiency of the converter is improved.To further improve the dynamic performance and anti-disturbance capability of the converter,the immune feedback mechanism is introduced based on the analysis of a single neuron controller.A fuzzy immune-single neuron PID control strategy is studied in this paper,in which the fuzzy immune control is combined with the single neuron smart controller to realize self-tuning of the single neuron proportional coefficient.Finally,a simulation study of the proposed converter and control strategy was carried out,and an prototype with an output of 200 V/0.5 A was designed for experimental verification.Both the simulation and experimental results show that the proposed converter can obtain a higher voltage gain under a smaller duty cycle.Compared with the traditional PID control strategy,the proposed fuzzy immune-single neuron PID control strategy can more effectively suppress system disturbances and improve the dynamic performance of the converter,indicating a stronger adaptive capability and a stronger robustness.

关 键 词：单开关 高增益 低应力 单神经元PID控制器 模糊免疫自整定 

分 类 号：TM46[电气工程—电器]