摘要
无线电能传输(WPT)系统具有高阶、非线性及强耦合的特点。为准确描述WPT系统动态响应,进而实现控制系统的优化设计与分析,该文以LCL-S电路拓扑为研究对象,利用广义状态空间平均建模方法得到WPT系统的大信号模型,在此基础上建立系统高阶小信号模型。同时,为简化系统控制器设计,采用拉盖尔多项式展开与平衡理论相结合的方法,对高阶小信号模型进行降阶处理,即将11阶系统降为3阶。仿真与实验结果表明,降阶系统与全阶系统具有相似的动态响应及小扰动稳定性,验证了降阶模型的有效性与准确性,为WPT控制系统的设计奠定了模型基础。
The wireless power transmission system has the characteristics of high level,nonlinearity,and strong coupling.To describe the dynamic response of the WPT system accurately to realize the optimal design and analysis of the control system,the report takes the LCL-S circuit topology as a research subject.Firstly,the large-signal model of the WPT system is obtained by the generalized state-space average modelling method.On the basis to establish a high-level small-signal model of the system.Also,Laguerre's expansion and balancing realization were used to reduce the level of the high-level small-signal model to obtain the low-order model and to simplify the design of the system controller.So,the third level was reduced by the eleventh level system.Simulation and experimental results show that the level-reduced system and full-level system have a similar dynamic response and small disturbance stability,which verifies the effectiveness and accuracy of the level-reduced model.And it builds a model foundation for the design of the WPT control system.
作者
程志远
邵会文
陈坤
眭清洋
李东东
Cheng Zhiyuan;Shao Huiwen;Chen Kun;Sui Qingyang;Li Dongdong(College of Electrical Engineering Shanghai University of Electric Power,Shanghai 200090 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2021年第24期5143-5152,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(5187070548)。
关键词
无线电能传输
小信号模型
平衡实现
模型降阶
Wireless power transfer
small-signal model
balanced realization
model reduction
