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Energies 2018, 11(8), 2032; https://doi.org/10.3390/en11082032

Enhancing the Robustness of the Wireless Power Transfer System to Uncertain Parameter Variations Using an Interval-Based Uncertain Optimization Method

Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410073, China
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Received: 9 July 2018 / Revised: 29 July 2018 / Accepted: 30 July 2018 / Published: 6 August 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

Uncertainty commonly exists in the wireless power transfer (WPT) systems for moving objects. To enhance the robustness of the WPT system to uncertain parameter variations, a modified WPT system structure and an interval-based uncertain optimization method are proposed in this paper. The modified WPT system, which includes two Q-type impedance matching networks, can switch between two different operating modes. The interval-based uncertain optimization method is used to improve the robustness of the modified WPT system: First, two interval-based objective functions (mean function and variance function) are defined to evaluate the average performance and the robustness of the system. A double-objective uncertain optimization model for the modified WPT system is built. Second, a bi-level nested optimization algorithm is proposed to find the Pareto optimal solutions of the proposed optimization model. The Pareto fronts are provided to illustrate the tradeoff between the two objectives, and the robust solutions are obtained. Experiments were carried out to verify the theoretical method. The results demonstrated that using the proposed method, the modified WPT system can achieve good robustness when the coupling coefficient, the operating frequency, the load resistance or the load reactance varies over a wide range. View Full-Text
Keywords: wireless power transfer; uncertain parameter variations; interval-based uncertain optimization; tradeoff decision; robustness wireless power transfer; uncertain parameter variations; interval-based uncertain optimization; tradeoff decision; robustness
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Luo, Y.; Yang, Y.; Wen, X.; Cheng, M. Enhancing the Robustness of the Wireless Power Transfer System to Uncertain Parameter Variations Using an Interval-Based Uncertain Optimization Method. Energies 2018, 11, 2032.

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