基于改进PSO的LLC谐振变换器自抗扰控制优化  

Active Disturbance Rejection Control Optimization of LLC Resonant Converter Based on Improved PSO

作　　者：熊奥 张良力[1,2] 徐万万[1,2] XIONG Ao;ZHANG Liang-li;XU Wan-wan(Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学,信息科学与工程学院,湖北武汉430081 [2]冶金自动化与检测技术教育部工程研究中心,湖北武汉430081

出　　处：《电力电子技术》2023年第11期110-114,共5页Power Electronics

基　　金：国家自然科学基金(51877161)。

摘　　要：针对传统比例积分微分(PID)控制LLC谐振变换器存在抗干扰能力差、动态性能不佳等问题,提出采用改进粒子群算法优化(PSO)自抗扰控制(ADRC)模型参数,达到优化LLC谐振变换器控制目的。为解耦自抗扰系统参数,对LLC谐振变换器进行小信号建模,将拟建ADRC模型视为二自由度系统,利用PID与ADRC传递函数存在的等效关系,使用频域法获得ADRC模型参数初始值。针对传统粒子易在全局最优位置周边产生振荡现象,采用线性递减惯性权重(LDIW)的粒子群在扩展范围内对ADRC模型参数进行优选重组,提升整定效度。实验证明优化后LLC谐振变换器ADRC动态性能明显改善。启动时电压到达标值减少5 ms,负载突变时电压恢复稳态减少2 ms。Facing the problems of poor anti-interference ability and dynamic performances of traditional proportion in-tegration differentiation(PID)controlled LLC resonant converters,an improved particle swarm optimization(PSO)algo-rithm is proposed to select the optimal parameters of active disturbance rejection control(ADRC)model to optimize the control of LLC resonant converters.In order to decouple parameters of the system with ADRC,the small signal modeling to a LLC resonant converter is used and the targeted ADRC model is considered as a two degree of free-dom system.Using the equivalence relationship between PID and ADRC transfer functions,the initial values of the ADRC model parameters are obtained with the frequency domain method.To solve the oscillation phenomenon of tra-ditional particles around the global optimal position,a particle swarm with linearly decreasing inertia weight(LDIW)is used to select the optimal parameters of the ADRC model restructured within an extended range,therefore the pa-rameters setting validity of the model is promoted.The experimental results show that the dynamic performance of LLC resonant converter with optimized ADRC is significantly improved.The consuming time is decreased by 5 ms when the voltage reaching standard value during start-up and decreased by 2 ms when the voltage recovering to a stable value during load suddenly changing.

关 键 词：变换器 自抗扰控制 线性递减惯性权重 

分 类 号：TM46[电气工程—电器]