无线电能传输系统的负载识别技术研究

发布时间：2019-05-16 10:43

【摘要】：无线电能传输技术（Wireless Power Transfer，简称WPT）是一种基于电磁耦合感应原理，综合利用现代电力电子应用技术、磁场耦合技术、大功率高频能量变换技术等，采用现代先进控制理论和策略，实现电能以电磁耦合形式从电网向移动用电设备提供能量的新型能量传输技术，具有安全、环保、便捷、易维护、对环境的适应能力强等优点。随着WPT技术在应用领域拓展需要，能对负载有普遍适应性的WPT系统越来越受到人们的关注。负载大小和性质的差异性使得系统无功补偿网络的拓扑结构有着多种多样的形式，从而对不同拓扑的功率控制策略也具有多样性。目前，对WPT系统负载识别的相关技术缺乏深入的研究。在很多情况下，如果采用传统的负载辨识方式，系统负载的电气参数或运行状态发生微小的改变，都会导致系统的效能下降，甚至导致系统的崩溃。同时，传统的负载识别方式只能针对某些固定结构的无功补偿拓扑，若系统负载发生变化，补偿网络拓扑也会随之变化，这就需要对整个系统进行重新建模分析，缺乏一般性。这就会导致系统各个功能模块间的适应性降低，限制了该技术在各领域的推广。本文描述了WPT技术中感应耦合形式系统的基本工作原理，分析负载变化对系统的影响，研究该变化对系统谐振状态的影响程度，进一步针对系统输出功率进行分析，定性定量的得出负载的变化对系统功率输出的影响。针对现有的负载识别技术，包括基于能量注入和能量自由振荡方式的阻抗辨识技术和基于反射阻抗的负载识别技术。对各技术方案的优缺点进行研究分析。然后，针对ICPT系统技术国内外现有的功率控制方法，，分析各种方案的优缺点，给出本文所研究负载识别方案的可行性与必要性。基于以上研究分析，引入一种基于能量模型的负载识别技术，来满足系统需求的功率控制策略，并详细的说明计算流程，给出计算公式。综上，作者在文章中旨在提出一种具有一般性，能够在复杂系统拓扑中均适用的负载识别方法，以及对所提方法的进一步优化改进。使用MATLAB/SIMULINK建立系统仿真模型，通过仿真验证了所提出负载识别方案的理论正确性，对仿真所得数据进行分析，确定了该方案的有效识别范围和条件。搭建了无线供电系统实验平台，针对实际的工程系统在不同性质和大小负载情况下进行了实验。实验结果验证了本文提出的负载识别方案的实验正确性和工程可行性，本文研究内容对无线电能传输技术进一步推广起了积极的作用。
[Abstract]:Wireless Power Transfer (WPT) is based on the principle of electromagnetic coupling induction, comprehensive utilization of modern power electronic application technology, magnetic field coupling technology, high-power high-frequency energy conversion technology, etc., adopting modern advanced control theory and strategy, The novel energy transmission technology for realizing the energy of the electric energy from the power grid to the mobile electric equipment in the form of an electromagnetic coupling has the advantages of safety, environmental protection, convenience, easy maintenance, strong adaptability to the environment and the like. With the development of the WPT technology in the application field, the WPT system with general adaptability to the load is more and more popular Note: The difference of load size and nature makes the topological structure of the reactive power compensation network of the system have a wide variety of forms, so the power control strategy of different topologies also has various forms. Sex. Currently, there is a lack of in-depth research on the related technology of the load identification of the WPT system Research. In many cases, if a traditional load identification method is adopted, the electrical parameters or operating conditions of the system load can be slightly changed, resulting in a reduction in the performance of the system and even a system failure The traditional load identification method can only be used for the reactive compensation topology of some fixed structures, and if the system load is changed, the compensation network topology can also change, this leads to a reduction in the adaptability between the various functional modules of the system, which limits the push of the technique in the various fields In this paper, the basic working principle of the inductive coupling formal system in WPT technology is described in this paper, the influence of the load change on the system is analyzed, the influence of the change on the system's resonant state is studied, and the output power of the system is further studied. Line analysis, qualitative and quantitative results of load change to system power output The influence of the current load identification technology, including the impedance identification technology based on energy injection and energy free oscillation, and the load recognition based on the reflection impedance Don't technology. The advantages and disadvantages of each technical scheme are researched. In this paper, the existing power control methods at home and abroad of the ICPT system are analyzed, and the advantages and disadvantages of the schemes are analyzed, and the feasibility and feasibility of the load identification scheme studied in this paper are given. Based on the above research and analysis, a power control strategy based on energy model is introduced to meet the power control strategy of the system requirement, and the calculation process is described in detail. In general, that author is intend to propose a load identification method which is general, which can be applied in the topology of complex system, and the further optimization of the proposed method. The system simulation model is established by using MATLAB/ SIMULINK, the theoretical correctness of the proposed load identification scheme is verified by the simulation, and the data of the simulation is analyzed, and the effective identification of the scheme is determined. The scope and condition of the wireless power supply system are set up. The experimental platform of the wireless power supply system is set up, and the actual engineering system is under the condition of different properties and loads The experiment is carried out. The experimental results verify the experimental correctness and the feasibility of the load identification scheme presented in this paper. The contents of this paper are further extended to the radio transmission technology.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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