This paper presents Maximum Power Point Control for variable speed wind turbine driven permanentmagnet generator. The wind turbine generator is operated such that the rotor speed varies according to wind speed to adjust the duty cycle of power converter and maximizes Wind Energy Conversion System (WECS) efficiency. The maximum power point for each speed value is traced using Maximum Power Point...

This paper describes an improved sensorless vector control strategy for a squirrel cage induction generator used in variable speed wind energy conversion systems (WECS). The main goal is to design a robust control algorithm immune to generator parameter variations. In order to estimate the rotational speed of the induction generator, a model reference adaptive system (MRAS observer) is used. It...

Wave power absorption with Energy Converters (WECs) arrays in front of a vertical wall is predicted an in-house transient wave-multibody numerical tool ITU-WAVE which uses time marching scheme to solve boundary integral equation for the analyses hydrodynamic radiation and exciting forces. The perfect reflection incident waves from considered method images. Mean interaction factor, can have cons...

Wave energy converters (WECs) usually require reactive power for increased levels of conversion, resulting in the need more complex take-off (PTO) units, compared to WECs that do not power. A WEC without produces much less energy, though. The concept Variable Shape Buoy Energy Converters (VSB WECs) is proposed allow continuous shape-change aiming at eliminating power, while converting a high le...

Wind turbines form complex nonlinear mechanical systems exposed to uncontrolled wind profiles. This makes turbine controller design a challenging task (Athanasius & Zhu, 2009). As such, control of wind energy conversion systems (WECS) is difficult due to the lack of systematic methods to identify requisite robust and sufficiently stable conditions, to guarantee performance. The problem becomes ...

Abstract—This paper presents a desktop study of comparing two different wave energy to electricity technologies (WECs) using a techno-economic approach. This techno-economic approach forms basis of a framework for rapid comparison of current and future technologies. The approach also seeks to assist in investment and strategic decision making expediting future deployment of wave energy harvesti...

As the grid codes of wind turbines note, doubly fed induction generator (DFIG)-based energy conversion system (WECS) should maintain uninterrupted operation during certain voltage faults. To meet codes, a novel configuration DFIG-based WECS is proposed in which superconducting magnetic storage (SMES) and series transformer are incorporated. The control strategies redesigned to smooth output pow...

The major purpose of this work is to design the controllers for controlling variable speed, pitch wind turbine (WT) with doubly fed induction generator (DFIG). Vector control strategy adopted DFIG active and reactive power. Generator torque provide regulated real power minimum fluctuation. fixed gain proportional-integral (PI) controller designed converter rotor side grid has limited operating ...