An Adaptive Current Limiting Controller for a Wireless Power Transmission System Energized by a PV Generator

Abstract

The use of a wireless power transmission system (WPTS) in modern applications, such as consumer electronics, renewable energy sources (RESs) and electric vehicles (EVs), can significantly increase the safety and convenience of the power supply. However, low efficiency is a major hurdle to the use of a WPTS in these applications. In this article, an adaptive virtual impedance controller (AVIC) is presented to enhance the wireless power transfer (WPT) efficiency of a photovoltaic generator (PVG) to the load. In the proposed controller, a unique method is employed to adaptively estimate the coefficient of coupling and resonant frequency of the WPTS coils as a function of the distance between the coils. Moreover, a modified incremental conductance (IC) based maximum power tracking (MIC-MPPT) technique is presented to operate the PVG at MPPT mode. The proposed MIC-MPPT is tested via a hardware prototype and the controller validation is carried out in the MATLAB/SIMULINK environment under various uncertainties, such as intermittent irradiance, variable load, and the distance between transmitter (Tx) and receiver (Rx) coils. Finally, a comparative analysis between the proposed controller and the conventional non-adaptive and adaptive resonant frequency controller is presented which confirms the superiority of the proposed controller.

Design of a Boost Converter with MPPT Algorithm for a PV Generator Under Extreme Operating Conditions

“…The purpose of this case is to enhanse the system efficiency by using MPPT (P&O) controller. The Simulink model includes; PVG, Boost Converter, MPPT( P&O) controller, and Load as shown in Figure (2). The simulatiom resultes are explained in Figures (3 -10) and Table 10.The simulation results includes eight tests, the same as given in case #2.…”

“…As a result, designing reliable and highly efficient power converters is one of the most interesting topics in the field of renewable power generation. In principle, the MPPT controller derives the DC-DC converter, which serves as an interface between load and PV cell, by controlling its duty cycle to extract maximum power out of the PV cell based on environmental conditions [2]. The output of DC-DC converter can be used to operate DC load directly.…”

Comparative Performance and Assessment Study of a Current-Fed DC-DC Resonant Converter Combining Si, SiC, and GaN-Based Power Semiconductor Devices

“…Replacing (4) into (5) and considering that the energy transferred to the load depends on the duty cycle, the selected duty cycle of the resonant tank is 0.5.…”

“…Examples of common control schemes in the Maximum Power Point Tracking (MPPT) are presented in [1][2][3][4]. Furthermore, there are some studies that evaluate the MPPT control by applying current controllers as proportional integral (PI), hysteresis, predictive, and sliding-mode controllers [5] maintaining the stable operation of a grid-connected PV system as they can regulate the current to follow the reference current (PV system).…”

A Graphical Design Methodology Based on Ideal Gyrator and Transformer for Compensation Topology with Load-Independent Output in Inductive Power Transfer System

“…Compared to traditional plug-in systems, inductive wireless energy transmission systems have advantages such as flexibility, convenience, electrical isolation, and strong environmental adaptability [1]. It has been employed in many applications.…”