Results 61 to 70 of about 39,174 (221)
A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT
Energies, 2020 Maximum Power Point Tracking (MPPT) control is an essential part of every photovoltaic (PV) system, in order to overcome any change in ambient environmental conditions and ensure operation at maximum power.. Recently, micro-inverters have gained a lot of
Omar Abdel-Rahim +5 more
doaj +1 more source
The small wind turbine field lab extensive field tests for small wind turbines [PDF]
, 2013 This paper describes the research possibilities at the Small Wind Turbine Field Lab and the involved research groups of Ghent University, covering different aspects of a small wind energy system. In contrast to large and medium-sized wind turbines, small
Botteldooren, Dick +9 more
core
Optimization of constant power control of wind turbines to provide power reserves [PDF]
, 2013 In several countries, the wind power penetration increased tremendously in the last years. As the current wind turbines do not participate in frequency control nor reserve provision, this may compromise the proper functioning of the primary control and ...
De Kooning, Jeroen +4 more
core +1 more source
Advanced Energy Materials, EarlyView.Halide segregation (HS) in mixed‐halide wide‐bandgap (WBG) perovskites is key to the stability of perovskite‐based tandem cells and a central focus of large‐scale research efforts. Here, we find that the underlying reason for the poor stability of cells prone to HS is enhanced ionic losses during operation. Furthermore, we identified irreversible ionic
Nikhil Kalasariya +24 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2016 为解决独立光伏发电系统中太阳能转换效率低、蓄电池使用寿命短等问题，将最大功率点跟踪技术(MPPT)和蓄电池优化充放电控制策略应用到太阳能充电系统中.同时，应用以TL494为核心的推挽升压电路，降低系统对太阳光的依赖性，在没有太阳光时，系统由储存的蓄电池能量通过升压电路给负载供电.据此设计了一种以Atmega 88单片机为核心，由DC-DC充电变换器和蓄电池升压电路组成的直流电源.实验结果表明，采用MPPT充电方式可以实现对蓄电池充放电的优化管理，其平均充电效率达到了91.24%，延长了蓄电池的使用寿命 ...
WANGXiumin(王秀敏) +4 more
doaj +1 more source
Advanced Energy Materials, EarlyView.While perovskite solar cells have been widely studied, including their stability, perovskite indoor photovoltaics (IPVs) have only recently emerged. Nevertheless, more studies are appearing in the literature. The systematic stability study of IPVs is crucial, particularly given the inconsistencies in reported methodologies and results, which call for ...
Ivy Mawusi Asuo +7 more
wiley +1 more source
Hilbert's projective metric in quantum information theory
, 2011 We introduce and apply Hilbert's projective metric in the context of quantum information theory. The metric is induced by convex cones such as the sets of positive, separable or PPT operators.
David Reeb +4 more
core +1 more source
Selective Ion‐Blocking Strategy for Stabilizing Perovskite Tandem Solar Cells
Advanced Energy Materials, EarlyView.A selective ion‐blocking Li─T interlayer is introduced at LiF‐passivated perovskite interfaces to suppress fluorine diffusion while preserving the beneficial interfacial passivation of LiF. This ion‐blocking strategy markedly improves the long‐term operational stability of both single‐junction and monolithic all‐perovskite tandem cells under continuous
Sunwoo Kim +15 more
wiley +1 more source
Modeling and Lyapunov-designed based on adaptive gain sliding mode control for wind turbines [PDF]
, 2016 In this paper, modeling and the Lyapunov-designed control approach are studied for the Wind Energy Conversion Systems (WECS). The objective of this study is to ensure the maximum energy production of a WECS while reducing the mechanical stress on the ...
Boumediene, Larbi +3 more
core
, 2017 Wind generation is expected to reach substantially higher levels of penetration in the near future. With the converter interface, the rotor inertia of doubly-fed induction generator (DFIG) based wind turbine generator is effectively decoupled from the ...
Tomsovic, Kevin, Wang, Siqi
core +1 more source