基于多目标优化理论的耦合无关恒压输出型LCC/S补偿感应电能传输系统  

Coupling-Independent Constant-Voltage Output LCC/S Compensation Inductive Power Transfer System Based on Multi-Objective Optimization Theory

作　　者：焦超群[1] 杨旭 杨俊峰 魏斌 吴晓康 Jiao Chaoqun;Yang Xu;Yang Junfeng;Wei Bin;Wu Xiaokang(School of Electrical Engineering Beijing Jiaotong University,Beijing 100044 China;China Electric Power Research Institute,Beijing 100192 China)

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]中国电力科学研究院有限公司,北京100192

出　　处：《电工技术学报》2023年第24期6565-6580,共16页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费专项资金资助项目(2023JBZX006)。

摘　　要：基于传统完全谐振参数设计方法的感应电能传输(IPT)系统只有在发射线圈和接收线圈完全耦合时才能表现出最佳性能。实际的IPT系统多为变耦合系统,耦合系数变化可能导致输出电压大范围波动和效率降低等问题。该文提出一种基于多目标优化理论的补偿拓扑参数设计方法,在耦合系数和负载变化的情况下仍然可以获得相对恒定的输出电压且能够高效运行。首先,利用基波近似分析法建立LCC/S补偿IPT系统的系统方程。其次,以补偿参数为优化变量,以减小输出电压波动、提升系统效率为优化目标,以电感最大通过电流、电容最大承受电压和零电压开关为约束条件建立多目标优化模型。然后,利用多目标粒子群优化(MOPSO)算法求解所建立的多目标优化模型,并得到Pareto最优解集。最后,根据实际需要,从Pareto最优解集中选择合适的补偿方案,并进行仿真分析和实验验证。实验结果表明,优化方案的电压波动率(VFR)约为传统方案的45%,且优化方案的最低传输效率(87.5%)仍大于传统方案的最高传输效率(86.3%)。该方法可用于优化满足耦合和负载无关恒定输出、高效率、零电压开关等特性的补偿拓扑。The inductive power transfer(IPT)system based on the traditional full resonance parameter design method presents the best performance only when the transmitting and receiving coils are fully coupled.Usually,the primary coil is fixed,and the position of the secondary coil is uncertain for human factors,causing lateral and longitudinal misalignment of the magnetic coupling mechanism.This misalignment of the magnetic coupling mechanism directly leads to the variation of the coupling coefficient,which may lead to a wide range of output voltage fluctuation and efficiency reduction.To obtain a relatively constant output voltage and operate efficiently under coupling coefficient and load variations,this paper overcomes the limitations of the traditional full resonance parameter design method,transforming the compensation topology parameter design problem into a multi-objective optimization problem.Firstly,after analyzing full resonance compensation parameters,the system equations of the IPT system with LCC/S compensation topology are established using the fundamental harmonic approximation(FHA)method.A multi-objective optimization model is established.Herein,compensation topology parameters are used as optimization variables,and output voltage fluctuation reduction and system efficiency improvement are as the optimization objectives.The constraints are maximum inductance passing current,maximum capacitor withstanding voltage,and zero voltage switching(ZVS).Then,a case is designed,and the multi-objective particle swarm optimization(MOPSO)algorithm is used to solve the multi-objective optimization model.Three optimization schemes are selected from the Pareto optimal solution set according to the actual needs,and the simulation analysis is carried out.Finally,based on the multi-objective optimization theory,an experimental platform is built to verify the coupling-independent constant output characteristics and efficient operation characteristics of the compensation parameter design method.The experimental results show that

关 键 词：感应电能传输 多目标优化 耦合无关恒压输出 多目标粒子群优化(MOPSO) 算法 PARETO解集 

分 类 号：TM724[电气工程—电力系统及自动化]