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The paper presents the development of wind turbine emulator which consists of an induction motor, torque inverter and real-time interface card. The wind turbine emulator system includes wind speed profiles, mathematical model of wind turbines, modeling of rotor blade characteristics and modeling of rotor inertia. Wind speed can be easily programmed based on white noise random model, or recorded wind...
Renewable energy sources have focused a special attention in wind energy conversion systems, where the goal is maximal power extraction. This paper presents an evaluation of the linear controllers eigen structure assignment, linear quadratic regulator, and the robust loop shaping design procedure actuating on a small wind energy conversion system with a permanent magnet synchronous generator, the...
Throughout the developmental process of the wind energy conversion system (WECS), wind tunnel test is essential for the design and performance evaluation of the WECS. However, such a field test inevitably increases design time and cost due to the complex test settlement. Therefore, a wind turbine emulator that can closely imitate the turbine characteristics would merit the cost reduction of the WECS...
There exists in Argentina a growing interest in alternative energy sources such as wind and solar energy for water pumping in remote areas. In this context, the main objective of the paper is to present and evaluate a configuration for an autonomous wind energy conversion system oriented to water pumping. It consists of a wind turbine with a wound rotor generator, electrically coupled with a squirrel...
Recent advancement in size and technology of wind energy conversion systems (WECSs) require sophisticated control systems to effectively optimize energy conversion and enhance grid integration. Doubly-fed induction generators (DFIG)-based WECS are the most promising and widely utilized technology. This study focuses on advanced controls development to identify and assess the critical loads and instabilities,...
This paper presents an artificial neural network (ANN) observer for a speed sensorless permanent magnet synchronous generator (PMSG) in wind energy conversion system (WECS). In order to perform maximum power point tracking control of the wind generation system, it is necessary to drive wind turbine at an optimal rotor speed. From the aspect of reliability and increase in cost, wind velocity sensor...
This paper encompasses the study of modelling and design of WECS, using a wind turbine with known dynamic characteristics and a permanent magnet synchronous generator driven by a back to back power converter topology. The dynamic modeling allows to know the response of the turbine generator system in the whole range of operation. In this study, it is proposed a variable structure control scheme with...
The amount of electricity generated by wind power converters is world wide steadily growing. In many countries it has become a political and public interest to support this development. From the wind park owner side of view it is of essential interest to generate and sell as much electricity as possible. With increasing shares of wind energy in the electrical power supply, their influence on the mains...
Grid connected wind energy conversion systems (WECS) present interesting control demands, due to the intrinsic nonlinear characteristics of windmills and electric generators. In this paper a predictive control strategy for doubly fed induction machine is proposed. The doubly fed induction machine is used in generating mode for large-scale grid-connected variable speed wind turbines. In order to control...
This paper analyses the influence of different wind energy converter control methods on the connected electrical grid. As the wind energy propagates through the converter to the mains, their frequency components are influenced by the conversion processes. The plant control strategies have a major influence on these components. Especially frequencies between 2 Hz and 8 Hz can cause undesired flicker...
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