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In this work, wind turbine pitch angle control using a Fuzzy controller in real time simulation is presented. This controller is implemented in RTDS™ (Real Time Digital Simulator). It was built based on knowledge of operation principles of wind turbines equipped with variable pitch angle control, not requiring mathematical models for this. An alternative for the Proportional-Integral (PI) controllers...
For the doubly fed induction generators (DFIG), the rotor side control makes possible to control the stator voltage and the rotational speed of the machine. Because the majority of rotor side control strategies do not include the rotor current, in this work it proposes one which is based on the states feedback in order to provide the rotor current control enclosure. The strategy consists in state...
For doubly fed induction machines operating as wind generators (DFIG), the terminal voltage and the active power delivered to the grid are controlled by a PWM converter linked to the machine rotor. The monitoring of the direct and quadrature axis components of the rotor voltage makes possible the control of the terminal voltage and active power, respectively. Currently, this control is performed by...
This paper presents a current-transformer (CT) model that is useful for low-frequency applications. To describe the iron-core magnetic behavior, a hysteresis model is proposed, which is able to generate minor asymmetric loops and remanent flux. The effects of classic eddy current losses and anomalous losses are represented by linear and nonlinear resistors, respectively. The obtained results are compared...
The total wind power installed in the world grew since 1992, from 2.5 GW to 40 GW in 2004 (30% per year). The industry esteems 75 GW for 2010, wich is equal to 167 TWh per year. This tendency leads to modifications in the electric systems behavior and to the necessity to take into account this new grid profile in dynamic analysis of electric systems. This work presents a methodology developed for...
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