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Small scale hydropower has a considerable untapped potential, able to contribute to the increased energy demand. The integration of these systems into microgrids is an emerging solution for the electrification of remote areas and for self-sustainable power systems. This paper is devoted to the design optimization of grid-connected pico-hydro systems using conventional photovoltaic inverters, providing...
This paper presents a new algorithm for controlling the magnetic induction waveform in a specific measurement system for the magnetic characterization and modeling of silicon steel sheets. Experimental results show that, with this new control algorithm, the measurement system is able to characterize silicon steel sheets under sinusoidal or nonsinusoidal waveforms in wide frequency and amplitude range.
Pico-hydro power generation has a considerable untapped potential, able to contribute to the increased energy demand whilst ensuring a low environmental impact. The integration of these systems into microgrids is an emerging solution for the electrification of remote regions and also for self-sustainable power systems. The integration of cheap and wide spread technologies to interface small capacity...
In this paper it is described the prototyping of an instrumented chair that allows to fully-automate the “Timed Up and Go”, the “30-Second Chair Stand” and the “Hand-Force ” tests assessment. The presented functional chair prototype is a low cost approach that uses inexpensive sensors and the Arduino platform as the data acquisition board, with its software developed in LabVIEW. The “Timed up and...
This paper describes the application of the methodology established in the Supplement 1 to the Guide to the Expression of Uncertainty in Measurement for the evaluation of uncertainties in the measurement of losses in power transformers. Also presented is the criterion for the validation of the software used for these measurements based on the original Guide. This additional method was developed since...
This paper presents new developments of a robust and low-cost instrument — less than 600 € — for monitoring and processing I-V and P-V characteristics of photovoltaic (PV) modules and high voltage strings. The characteristics can be traced on an oscilloscope or using a developed a LabVIEW application. It is a simple instrument because only fundamental electronic circuits are used. The equipment consists...
In the emergent deployment of the smart grids, storage systems play an important role into assets utilization optimization, providing backup power and peak-shaving. This concept becomes more critical in the context of microgrids with a high penetration of renewable energy resources. Plug-in electric vehicles provide an enormous distributed storage capability, which favours the technical and economical...
This paper describes the application of the method established in the Supplement 1 to the Guide to the Expression of Uncertainty in Measurement for the evaluation of uncertainties in the measurement of losses in power transformers. Also presented is the criterion for the validation of the software used for these measurements based on the original Guide. This additional method was developed since the...
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