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"An Investigation on the Integration of a Hybrid Offshore Wind-Wave Ene" by Safdar Rasool, Kashem M. Muttaqi et al.

This paper introduces the hybridization of multiple linear permanent magnet generator (LPMG)-based wave energy conversion systems with a doubly-fed induction generator (DFIG)-based wind energy conversion system. A detailed investigation of the impact of the integration of the wind-wave hybrid system with the distribution network is presented in this study. The control scheme for the multiple LPMGs ensures the optimum extraction of the wave power and the ability to maintain voltage balance at the outputs of the LPMGs. Similarly, the back-to-back converters of the DFIG are controlled for the maximum power point tracking of the wind turbine and the dc-link voltage regulation. The turbine rotor blade pitch angle is controlled to minimize the power fluctuations caused by the integration of LPMGs at the common DC bus. The time-domain simulation results confirm the effectiveness of the proposed system by showing a stable operation when integrated with the distribution test feeder. Finally, th ....

Distribution Network , Distribution Networks , Oubly Fed Induction Generators , Linear Generator , Voltage Control , Voltage Regulation , Save Energy , Wave Energy Conversion , Wind Turbines , Ind Wave Hybrid ,

"A Novel Configuration of a Hybrid Offshore Wind-Wave Energy Conversion" by Safdar Rasool, Kashem M. Muttaqi et al.

This paper aims to develop a novel hybrid offshore wind-wave energy conversion system (HOW-WECS) configuration which can successfully feed a stable power to the customers of remote communities in near-shore areas or remote islands. The proposed configuration uses a minimum number of converters for the integration of the doubly-fed induction generator (DFIG)-based wind energy system with the direct-drive linear permanent magnet generator (DDLPMG)-based wave energy system. Advanced control schemes for the DFIG and the DDLPMG are presented to enhance the power extraction from the implemented HOW-WECS. The dynamic and the transient performance of the proposed system and the associated control schemes are tested under various operating scenarios and electrical fault conditions. The dynamic performance was acceptable as the implemented control strategies were able to keep the stator voltage and the stator current of the DFIG sinusoidal and balanced, the frequency excursions are within the ac ....

Oubly Fed Induction Generators , Frequency Regulation , Hybrid Power Systems , Ower Maximization , Power Supply , Power System Stability , Save Energy , Wave Energy Conversion , Wind Energy , Wind Turbines , Ind Wave Hybrid ,

"A Novel Saturated Amorphous Alloy Core Based Fault Current Limiter for" by Md Minarul Islam, Kashem M. Muttaqi et al.

Abstract
This paper proposes the use of a novel saturated amorphous alloy core-based fault current limiter (SAACFCL) to improve the LVRT capability of doubly-fed induction generator (DFIG) based wind energy systems, especially during voltage sag events. Compared to the traditional cores which are widely used in fault current limiter (FCL), amorphous alloy core possesses a very narrow B-H loop which indicates that the SAACFCL requires a smaller dc excitation current, and it will incur low core losses. Under normal conditions, this developed SAACFCL accomplishes low impedance and has a negligible impact on the network operation. During grid faults, a deep voltage sag causes large fault currents that de-saturate the SAACFCL core, increasing its impedance which limits the fault currents and improves the LVRT capability of DFIG systems. The SAACFCL is designed and characterized by ANSYS software. To validate the performance of the SAACFCL, a DFIG based system equipped with the SAAC ....

Amorphous Alloy Core , Circuit Faults , More Loss , Oubly Fed Induction Generators , Fault Current Limiter , Ault Currents , Ow Voltage Ride Through Capability , Power Quality , Oltage Sag Mitigation , Wind Turbines , ஒரே இழப்பு ,