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The pitch regulated variable-speed wind turbines operate at rated power output point by adjusting pitch angle as the wind speed is over rated value. In this case the pitch angle controller may play important roles on keeping normal operation and minimizing fatigue load for wind turbine. This paper proposes a new optimal control strategy with multiple objectives where maximum power and minimizing load...
In double objectives control of wind power generation system, two components, a slowly varying component and a rapidly varying component are considered for wind model. This paper proposes a frequency separation guideline to get these two components for better realization of double objectives control. It makes use of the results of power spectral density analysis to determine the cutoff frequency of...
In an acquisition, tracking & pointing system (ATPS), there are many cables as usual. The torque caused by cables (TC) is so powerful that it may influent on the control accuracy of the system. In this paper, a way of how to test TC was put forward. And the model of TC was made via the experiment results. It includes two parts. One is elastic force, the other is damp. Next, the influence on ATPS...
It is the main objective for conventional variable-speed constant frequency wind energy conversion system (WECS) below the rated power to realize maximum power point tracking (MPPT). This paper presents a double objectives control scheme for WECS. Based on the frequency separation principle, the wind speed is divided into two components, a slowly varying component, named seasonal, and a rapidly varying...
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