Utility-connected power converter for maximizing power transfer from a photovoltaic source while drawing ripple-free current

2003 ◽  
Author(s):  
T. Brekken ◽  
N. Bhiwapurkar ◽  
M. Rathi ◽  
N. Mohan ◽  
C. Henze ◽  
...  
Keyword(s):  
Power Converter ◽  
Power Transfer ◽  
Free Current

scholarly journals A Power Converter Decoupled from the Resonant Network for Wireless Inductive Coupling Power Transfer

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1192 ◽  
Author(s):  
Lin Chen ◽  
Jianfeng Hong ◽  
Mingjie Guan ◽  
Wei Wu ◽  
Wenxiang Chen
Keyword(s):  
Theoretical Analysis ◽  
Power Control ◽  
Power Source ◽  
Power Converter ◽  
Soft Switching ◽  
Inductive Coupling ◽  
System Efficiency ◽  
Power Transfer ◽  
Coupling Coefficients ◽  
Strongly Coupled

In a traditional inductive coupling power transfer (ICPT) system, the converter and the resonant network are strongly coupled. Since the coupling coefficient and the parameters of the resonant network usually vary, the resonant network easily detunes, and the system efficiency, power source capacity, power control, and soft switching conditions of the ICPT system are considerably affected. This paper presents an ICPT system based on a power converter decoupled from the resonant network. In the proposed system, the primary inductor is disconnected from the resonant network during the energy injection stage. After storing a certain amount of energy, the primary inductor is reconnects with the resonant network. Through this method, the converter can be decoupled from the resonant network, and the resonant network can be tuned under various coupling coefficients. Theoretical analysis was explored first. Simulations and experimental work are carried out to verify the theoretical analysis. The results show that the proposed ICPT system has the virtues of low power source capacity, independent power control, and soft switching operation under different coupling coefficients.

Theoretical Analysis of Prospects of Organic Photovoltaics as a Multi-Functional Solar Cell and Laser Power Converter for Wireless Power Transfer

2020 ◽  
Vol 20 (8) ◽  
pp. 4878-4883
Author(s):  
Premkumar Vincent ◽  
Jaewon Jang ◽  
In Man Kang ◽  
Philippe Lang ◽  
Hyeok Kim ◽  
...  
Keyword(s):  
Laser Power ◽  
Power Converters ◽  
Power Conversion ◽  
Wireless Power Transfer ◽  
Power Converter ◽  
Potential Candidate ◽  
Power Transfer ◽  
Wireless Power ◽  
Power Harvesting ◽  
Single Junction

Few reports have researched on utilization of laser power conversion systems for wireless power transfer in aeronautical applications. III–V compound semiconductors are commonly used as photovoltaic (PV) power converters in the previous studies. We propose the prospects of using organic absorbers as PV power converters. For laser power conversion to be applied for portable devices, the PV module should be easily processable, thin, low-weight, and printable on flexible substrates. Organic PVs provide all the above advantages, and thus, could serve as a potential candidate for laser power harvesting applications. Moreover, they can also be made transparent, which could be utilized in power harvesting lamination coatings and windows. We had simulated the possibility of using single-junction and tandem photovoltaic structures for 670 nm and 850 nm laser power harvesting. FDTD simulations were conducted to optimize the PV structure in order to maximize the absorption at the laser wavelengths. A maximum PCE of 16.17% for single-junction PV and 24.85% for tandem PV was theoretically obtained.

scholarly journals Design of an Intrinsically Safe Series-Series Compensation WPT System for Automotive LiDAR

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 86 ◽  
Author(s):  
Luiz Cardoso ◽  
Vítor Monteiro ◽  
José Pinto ◽  
Miguel Nogueira ◽  
Adérito Abreu ◽  
...  
Keyword(s):  
Low Power ◽  
Design Procedure ◽  
Power Converter ◽  
Open Circuit ◽  
Secondary Coil ◽  
Primary Circuit ◽  
Power Transfer ◽  
Coupling Coefficients ◽  
Primary Coil ◽  
Resonant Condition

The earliest and simplest impedance compensation technique used in inductive wireless power transfer (WPT) design is the series-series (SS) compensation circuit, which uses capacitors in series with both primary and secondary coils of an air-gapped transformer. Despite of its simplicity at the resonant condition, this configuration exhibits a major sensitivity to variations of the load attached to the secondary, especially when higher coupling coefficients are used in the design. In the extreme situation that the secondary coil is left at open circuit, the current at the primary coil may increase above the safety limits for either the power converter driving the primary coil or the components in the primary circuit, including the coil itself. An approach often used to minimize this problem is detuning, but this also reduces the electrical efficiency of the power transfer. In low power, fixed-distance stationary WPT, a fair trade-off between efficiency and safety must be verified. This paper aims to consolidate a simple design procedure for such a SS-compensation, exemplifying its use in the prototype of a WPT system for automotive light detection and ranging (LiDAR) equipment. The guidelines herein provided should equally apply to other low power applications.

scholarly journals Model-Free Neural Network-Based Predictive Control for Robust Operation of Power Converters

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2325
Author(s):  
Sanaz Sabzevari ◽  
Rasool Heydari ◽  
Maryam Mohiti ◽  
Mehdi Savaghebi ◽  
Jose Rodriguez
Keyword(s):  
Neural Network ◽  
Predictive Control ◽  
Control Strategies ◽  
Power Converter ◽  
Performance Criterion ◽  
Parameter Mismatch ◽  
Model Free ◽  
Finite Control ◽  
Free Current ◽  
Definition Of

An accurate definition of a system model significantly affects the performance of model-based control strategies, for example, model predictive control (MPC). In this paper, a model-free predictive control strategy is presented to mitigate all ramifications of the model’s uncertainties and parameter mismatch between the plant and controller for the control of power electronic converters in applications such as microgrids. A specific recurrent neural network structure called state-space neural network (ssNN) is proposed as a model-free current predictive control for a three-phase power converter. In this approach, NN weights are updated through particle swarm optimization (PSO) for faster convergence. After the training process, the proposed ssNN-PSO combined with the predictive controller using a performance criterion overcomes parameter variations in the physical system. A comparison has been carried out between the conventional MPC and the proposed model-free predictive control in different scenarios. The simulation results of the proposed control scheme exhibit more robustness compared to the conventional finite-control-set MPC.

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