Open Access. Powered by Scholars. Published by Universities.®

Power and Energy Commons™

Open Access. Powered by Scholars. Published by Universities.®

2012

Technological University Dublin

Articles 1 - 6 of 6

Full-Text Articles in Power and Energy

Voltage Flicker Evaluation For Wave Energy Converters – Assessment Guidelines, Fergus Sharkey, Elva Bannon, Joe Macenri, Kevin Gaughan, Michael Conlon Oct 2012

Voltage Flicker Evaluation For Wave Energy Converters – Assessment Guidelines, Fergus Sharkey, Elva Bannon, Joe Macenri, Kevin Gaughan, Michael Conlon

Conference papers

Voltage flicker is a power quality problem caused by regularly oscillating active and reactive power either from a load or generator. The regular power oscillations induce a voltage change at the grid connection which is proportional to the amplitude of the power oscillation and at the same frequency. The impedance of the grid (grid strength) at the point of connection is a factor in the amplitude of the voltage oscillation. The frequency band of interest for flicker evaluation is from 0.01-20Hz, and is most severe at 8.8Hz. The frequency of the primary resource for wave energy converters lies within this …

Go to article

Practical Analysis Of Key Electrical Interfaces For Wave Energy Converter Arrays, Fergus Sharkey, Michael Conlon, Kevin Gaughan Oct 2012

Practical Analysis Of Key Electrical Interfaces For Wave Energy Converter Arrays, Fergus Sharkey, Michael Conlon, Kevin Gaughan

Conference papers

The authors have previously outlined a proposed path for the development of electrical networks for deepwater wave farms. This path broadly followed that of offshore wind farms as the least cost solution. The main differences between wind farm and wave farm electrical networks were identified as the method of installation and maintenance and the components at the WEC interface with the electrical network. Components such as dynamic cables, submarine connectors, submarine switchgear all form part of these interfaces. This paper examines the key electrical interfaces for WEC arrays such as the dynamic cable to WEC interface, dynamic cable to static …

Go to article

Design And Test Of A Linear Switched Reluctance Generator For Use In Wave-Energy Applications, Garret Brady, Cathal O'Loughlin, John Massey, David Griffiths, Carlos Villegas Oct 2012

Design And Test Of A Linear Switched Reluctance Generator For Use In Wave-Energy Applications, Garret Brady, Cathal O'Loughlin, John Massey, David Griffiths, Carlos Villegas

Conference Papers

This paper describes the design of a double-sided linear switched reluctance generator for use in wave energy applications, and the build and test of a working bench-scale prototype. Beginning with a standard shape, the development of the design, from concept to detail, is presented. Numerical simulation results – magnetic, mechanical and electrical – inform the detailed design. Construction of the generator and test rig is described. Experimental results give good agreement with simulation predictions.

Go to article

Analysis Of Compensation Techniques Applied To The Control Of Converter Connected Synchronous Wind Turbines And Dfig’S During Grid Disturbances., Joseph Kearney, Michael Conlon, Eugene Coyle Sep 2012

Analysis Of Compensation Techniques Applied To The Control Of Converter Connected Synchronous Wind Turbines And Dfig’S During Grid Disturbances., Joseph Kearney, Michael Conlon, Eugene Coyle

Conference papers

This paper investigates control schemes to improve the performance of converter connected synchronous generators and DFIG’s to grid voltage unbalance and grid faults. Both the synchronous generator with a full converter and a DFIG are modelled in Matlab/Simulink. The control schemes of both turbines are modified to improve their performance during grid disturbances including grid voltage unbalance and single-phase faults. These disturbances are introduced into the models at specific times to analyse the performance of the wind generation systems. The performances of both systems to the grid disturbances are compared and the results are analysed.

Go to article

An Energy Survey Of The Church Lane Building At Dit, Joseph Teehan Sep 2012

An Energy Survey Of The Church Lane Building At Dit, Joseph Teehan

Other resources

Within the European Union, the collective governments have introduced broad energy policies in order to increase energy efficiency and improve energy performance in new and existing buildings, within each member state. The following dissertation considers energy and how energy is used within the context of global and local consumption in an extensive literature review. Where does the future lie for Ireland and its energy sources? Policies, standards and regulations associated with energy efficiency and the Energy Performance of Buildings Directive (EPBD) are defined and briefly explained. The status of how well the response from the commercial building market to Building …

Go to article

Monitoring And Regression Based Modelling Of End Winding Vibration In Large Synchronous Generators., David Shally May 2012

Monitoring And Regression Based Modelling Of End Winding Vibration In Large Synchronous Generators., David Shally

Masters

This research project was set up to monitor, on an ongoing basis, the condition of the end windings and their support structures of a 288 MVA 2-pole synchronous generator with a known end winding vibration problem Excessive vibration at the end windings was caused by the natural frequencies of individual end bars (local) and of the entire end winding structure (global) being at or close to the magnetic forcing frequency of 100 Hz. Resonant vibration such as this has been a cause of major failures in machines of the same type in the past, resulting in significant down time ranging …

Go to article