摘要
磁耦合谐振式无线电能传输系统中,当耦合系数较大时系统将发生频率分裂现象导致输出功率降低。采用软件调频的输出控制可以稳定输出性能。然而输出功率是一个极值个数和半径都可变的多峰函数,因此需要改进标准人工蜂群算法以搜索所有极值。首先通过系统模型的分析,说明频率分裂现象的影响和多峰搜索的必要性,提出一种原边控制方法,得到输出性能的函数。然后提出3种策略对标准人工蜂群算法进行改进,包括采用正交生成法改进了食物源的分布;采用比较父代与子代之间的欧式距离选择食物源,避免漏峰;通过对适应度排序确定个体增量动态地缩小小生境的范围。最后搭建了一个两线圈无线电能传输系统,通过计算和实验证明,改进的人工蜂群算法收敛速度快、优化精度高,在保证传输效率的前提下,能够提高并稳定系统在过耦合状态时的输出功率。
In a magnetically coupled resonant wireless power transfer(MCR-WPT)system,frequency splitting will occur when the coupling coefficient is large,leading to the decrease in output power.The use of software frequency modulation output control can stabilize the output performance.However,the output power is a multi-peak function with a variable number of extremes and a variable radius.As a result,it is necessary to improve the standard artificial bee colony(ABC)algorithm to search all the extreme values.Firstly,the effect of the frequency splitting phenomenon and the necessity of multi-peak search are explained through the analysis of the MCR-WPT system model,and a primary control method is proposed to obtain the functions of output performance.Then,three strategies are put forward to improve the standard ABC algorithm.Specifically,an orthogonal generation method is adopted to improve the distribution of food sources.The food sources are selected according to the Euclidean distance between parents and their offspring,thus avoiding the missing of peaks.By sorting the fitness value,the increase in individual fitness value is determined,so that the range of niche is dynamically reduced.Finally,a 2-coil WPT system is built.Calculation and experimental results prove that the improved ABC algorithm has a fast convergence speed and a high optimization accuracy,and it can improve and stabilize the output power under the premise of ensuring the transmission efficiency.
作者
杨晶菁
陈为
YANG Jingjing;CHEN Wei(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350116,China)
出处
《电源学报》
CSCD
北大核心
2022年第2期173-182,共10页
Journal of Power Supply
基金
国家自然科学基金资助项目(51777036)
福建省数字化装备与柔性制造创新中心创新基金资助项目(CXZX-202003)。
关键词
磁耦合谐振式无线电能传输
输出控制
人工蜂群算法
频率分裂
小生境
magnetically coupled resonant wireless power transfer(MCR-WPT)
output control
artificial bee colony(ABC)algorithm
frequency splitting
niche
