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As a renewable, clean energy, wind energy has attract more and more attention. It has become a common understanding of the world to vigorously develop wind energy. In order to guarantee the safety and reliability for wind power integration operation, it is of great significance to establish an appropriate wind power generator system model and analyze its electromagnetic transient characteristics....
This paper presents the comparison of three different strategies for the control of a doubly fed induction generator (DFIG) in wind energy conversion systems (WECS). Three of the most widespread and well-performing control approaches are implemented in an experimental setup based on a digital signal processor (DSP), namely, vector control, direct torque control, and direct power control. Said control...
The successfulness of wind energy is, its cost competitiveness, environmental clean, safeness and most importantly, it is a renewable energy. The Non linear control algorithms are used to maximize the system performance and optimize the control of wind turbine speed. This paper proposes wind speed estimation based neuro-fuzzy control to extract maximum power from the wind electrical power generating...
The modeling of wind power plants incorporating synchronous generator and full-converters for using in power system simulations is presented in this paper. In other words, all components of the above-mentioned power plant using typical values as well as their corresponding control systems are in details modeled and also simulated. The control strategy of the variable-speed wind turbine is the maximum...
In the control of the wind generation, the maximal power point tracking (MPPT) control plays important role in the efficiency. This paper presents the simulation results of the MPPT control with RTDS-based DFIG model. At first, it analyzes the vector-control scheme for the MTTP, which results in independent control of active and reactive power of the generator. And then, it develops the MPPT controller...
A maximum power point tracking (MPPT) controller for variable speed wind energy conversion system (WECS) is proposed. The proposed method, without requiring the knowledge of wind speed, air density or turbine parameters, generates at its output the optimum speed command for speed control loop of rotor flux oriented vector controlled machine side converter control system using only the instantaneous...
Doubly-Fed Induction Generator (DFIG) has been widely used in Variable-Speed Constant-Frequency (VSCF) wind energy generation system. Vector control has already been applied to the DFIG control, which makes the DFIG gain good performance in the wind energy capturing operation. In recent years, many researches of vector control take the following manner to track the largest wind energy under the rated...
This paper describes the models of a wind power system, such as the turbine, generator, power electronics converters and controllers, with the aim to control the generation of wind power in order to maximize the generated power with the lowest possible impact in the grid voltage and frequency during normal operation and under the occurrence of faults. The presented work considers a wind power system...
The paper analyses the wind turbine characteristics and doubly-fed induction generator (DFIG) stator magnetic field orientation vector control principle, realizes DFIG active power and reactive power decoupling control. After the decoupling, the paper adopts sliding mode (SMC) control theory, proposes a control strategy to track the maximum wind energy. The method can increase the system robustness...
This paper presents a novel maximum power point tracking (MPPT) control method for variable-speed constant-frequency wind energy conversion systems (WECS). The proposed tracking method combines the ideas of sliding mode (SM) control and extremum seeking control (ESC). The only input needed in this method is the output active power of the generator. It avoids some difficult problems in traditional...
This paper presents a new synchronization algorithm for grid connection of a doubly fed induction generator (DFIG) in wind generation system. A stator flux-oriented vector control is used for the variable speed DFIG operation. By controlling the generator excitation current the amplitude of the stator EMF is adjusted equal to the amplitude of the grid voltage. To set the generator frequency equal...
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