Advanced Research Projects

Review of Wind-Energy Conversion Systems

Brian C. Raczkowski with adviser Peter W. Sauer

Three main wind-energy conversion concepts dominate the wind energy market. The first utilizes the fixed speed concept by having an induction generator directly connected to the grid and using pitch control to control the input power. The second uses the variable-speed concept where the generator’s stator is connected to a power converter that is then connected to the grid. Power electronics are necessary, and the available power is limited by the power-electronic ratings. The third type uses the variable speed concept as well, but the generator’s stator may or may not be connected to the grid through a power converter. Instead, access to the rotor gives greater control of the input power. Research issues that need to be addressed include internal and external network disturbances and their effects on WECS, appropriate modeling for power-system steady-state and dynamic simulation, and the economic impact of WECS in large- and small-scale penetration of the grid.

2005-2006 Projects

• Magnetic Equivalent Circuits Applied to Induction Machine Design
• Mathematical Field Computation as an Analytical Tool for Electric Machines
• An Extended Field Reconstruction Technique for Optimization of Permanent Magnet Synchronous Machine Drive Systems
• A Framework for the Analysis and Design of Vector Controllers for Induction Machines
• Hand-Cranked Electric Generator to Poper Remote Off-Grid Villages