Control of Variable Speed Wind Turbines in Islanded Mode of Operation
ABSTRACT Nowadays, technology evolution and deregulation of the electric utility industry enable distributed generation (DG) to play an increasing role in locally satisfying the expanding power demand. In this paper, the islanded operation of an electrical grid supplied by wind turbines, which belong to the most rapidly expanding DG technologies, is studied. Control strategies for power electronics interface of variable speed wind turbines, ensuring fast control of frequency and voltage, are proposed.
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ABSTRACT: The usage of wind energy as a form of renewable energy is becoming increasingly popular year by year. This technology has been applied widely in several regions in the world and already reached maturity in terms of technology, infrastructure and cost competitiveness. The performance of the wind turbine system depends upon factors such as design, aerodynamic performance and material selection. Thus, Structural Health Monitoring (SHM) has become crucial in evaluating the performance of wind turbine in real time. Furthermore, the application of smart material in SHM can be utilized as micro energy harvester as well. Nonetheless, the application of SHM in Malaysia׳s climate for wind turbine is still premature, especially in the approach biocomposites material towards its blade system. Several issues are highlighted in this paper such as Vertical Axis Wind Turbine (VAWT), biocomposites material selection and the issue in the micro energy harvester as well. The issues are discussed and compared with the recent finding in this review. Several recommendations are suggested for future studies in benefiting the Malaysian especially on the application of wind energy to promote better green technology for tomorrow.Renewable and Sustainable Energy Reviews 07/2014; 35:23–30. DOI:10.1016/j.rser.2014.03.050 · 5.51 Impact Factor
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ABSTRACT: In this paper an extensive literature review on load–frequency control (LFC) problem in power system has been highlighted. The various configuration of power system models and control techniques/strategies that concerns to LFC issues have been addressed in conventional as well as distribution generation-based power systems. Further, investigations on LFC challenges incorporating storage devices BESS/SMES, FACTS devices, wind–diesel and PV systems etc have been discussed too.Renewable and Sustainable Energy Reviews 09/2013; 25:318–334. DOI:10.1016/j.rser.2013.04.029 · 5.51 Impact Factor
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ABSTRACT: This paper presents a method for controlling the output power of a permanent magnet synchronous generator (PMSG) in strong wind conditions. Currently, most of wind turbines are stopped and disconnected from the power system when wind speeds reaches more then 25 m/s. This will lead to detrimental power and voltage fluctuations in the power system. To overcome this problem, output power, pitch angle and rotation speed command values are designated. A novel method, which includes pitch angle and rotation speed control is proposed. Simulation results show that the wind turbine can generate stable power during strong wind conditions.Industrial Electronics (ISIE), 2013 IEEE International Symposium on; 01/2013