PV cell impedance requirements for inductor-less power optimizers

Renewable energy sources and in particular solar energy represent our mean to mitigate global warming and reduce the dependency from fossil fuel. Also, photovoltaic panels allow for production of clean energy anywhere, also in the urban environment where, unfortunately, non-ideal working conditions such as partial shading happen often and can...

Effects of Induction and Wake Steering Control on Drivetrain Fatigue and Wind Farm Power Production

Power optimization through wake steering and axial induction control is a well investigated topic in wind energy, which is generally proven to work. The influence of control manoeuvres on the fatigue of static components is generally discussed, but drivetrain fatigue due to wake steering and axial induction control is rarely discussed, while it...

Evaluation of the Impact of Technology Scaling on Delay Testing for Low-Cost AVS

With the continued down-scaling of IC technology and increase in manufacturing process variations, it is becoming ever more difficult to accurately estimate circuit performance of manufactured devices. This poses significant challenges on the effective application of adaptive voltage scaling (AVS) which is widely used as the most important...

An Active Switching Circuit for Solar Cells: A circuit that changes the wiring configuration of solar cells to optimise the electrical power output of a solar panel

The electrical output of a solar panel can be optimised in several ways, through the inclusion of bypass diodes (BPDs) or to have a maximum power point (MPP) tracker or DC optimiser to ensure that the panel is always operating at its global MPP. However most of these systems have to be implemented externally to the panel. A new system, the...

Dynamic Wind Farm Control using the WFSim flow model

Renewable energy is becoming more and more important in today's society. Wind energy plays an important role in the production of renewable energy. Due to economic advantages, wind turbines are often sited close together, creating wind farms. As a result, the wind turbines in the farm become interconnected due to the wakes of the turbines. In...

Illumination control of an LED lighting system based on localized occupancy

Light emitting diode (LED) based systems are considered to be the future of lighting. We consider the problem of energy-efficient illumination control of such systems. Energy-efficient system design is based on two aspects: localized information of occupancy and optimization of dimming levels of the LEDs. Specifically, we are interested in...