/pdf/desenvolvimento-de-uma-arquitectura-distribuida-para-2nz8xi8cfa.pdf

Desenvolvimento de uma arquitectura distribuída para controlo de potência

Active power measurement of an inverter-fed induction motor in a photovoltaic water pumping system is considered. An improved digital method based on FFT (fast Fourier transform) techniques is used. Measurement results show the advantages of this method over currently available power measurement apparatus. This technique is applied at the intermediate AC stage for inverter output power measurement corresponding to the power consumed by the motor. Thus, both motor and power converter behavior can be analyzed from the resulting power estimation according to efficiency or the electromechanical criterion. It is shown that the digital techniques used for the power measurement make it possible to obtain reliable results.

http://ieeexplore.ieee.org/iel3/4933/13603/00624455.pdf

Improving power measurement using FFT techniques on electrical machines fed by a photovoltaic system

The communication protocols in multiprocessor systems give complex problems; hence it is necessary to verify the main mechanisms before setting up in order to detect eventual design errors. In this context, the use of formal description techniques is an essential aspect of the design phase. The aim of this article is to present a formal model for a real-time control system for an autonomous wind-solar power station. This model allows, on the one hand, an adequate expression of tasks to be performed (parallelism, synchronisation by message exchanges and by time constraints) and on the other, qualitative (logic of mechanisms) and quantitative (evaluation of performances) analyses. >

P. Rouan

Papers

Improving power measurement using FFT techniques on electrical machines fed by a photovoltaic system

Application of Petri nets to the modeling of a wind-solar power plant control system