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The power of offshore wind turbines are expected to increase to 10 MW and more in the future. This will make today's technology unsuitable due to increased nacelle weight. Therefore, this work focus on a new modular converter solution, which designed specifically to a generator results in reduced nacelle weight. Additional benefits are redundancy and modularity in the converter.
An adaptive second order sliding mode control strategy is explored in this work, to maximize the energy extracted from the wind in a wind energy conversion system (WECS). It is required to such strategy to deal with the nonlinear nature of the WECS, the randomness of the wind speed, model uncertainties and external disturbances, and also with the need to reduce mechanical loads. The special features...
This paper reports on the control necessary in a Bristol cylinder sea-wave energy capture device and the issues concerned with harvesting a slow, propagating sea-wave, where the power will pulsate. In the paper a detailed description is put forward for the mechanical system. The control strategies necessary to control a system that is has continuously changing conditions are outlined and simulations...
A multivariable control strategy based on model predictive control techniques for the control of variable speed variable pitch wind turbines is proposed. The proposed control strategy is described for the whole operating region of the wind turbine (both partial and full load regimes). Pitch angle and generator torque are controlled simultaneously to maximize energy capture, mitigate drive train transient...
Dedicated to high energy-consuming industries, such as chloral-alkali, seawater desalination, and electrolytic aluminum, a novel non-grid-connected power generation (NGCPG) system is proposed; it is composed of a fixed-pitch variable speed wind turbine and a doubly salient DC brushless generator. The configuration of the non-grid-connected power system mentioned is presented. An equivalent model of...
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