It has been widely reported that yaw drive failures are a major cause of turbine downtime in Californian windfarms and that wind turbines may be subject to undesirable yaw behavior throughout their operational life. In fact, operation with up to 30 degrees of yaw error is not uncommon and in some instances downwind machines have been observed running upwind. With this in mind, the UTEP teetered rotor test bed (TRTB) is being utilized to experimentally investigate the effects of yaw and yaw rates on the operation of a teetered rotor. In parallel with this experimental effort, a design and analysis tool ″TEETER″ is being used to predict behavior and assist in the understanding of the experimental results., Preliminary results of investigation conducted using the TRTB shows the effects of a wide range of yaw angles on power and loads. Furthermore, the passive 'Autofurl' emergency shutdown procedure is documented. This technique relies on the rotor thrust axis being offset from the yaw axis, driving the machine to a sage 90 degree furl angle when the electromagnetic yaw clutch is released., This work was supported by the Governor's Energy Office, State of Texas, the Texas Higher Education Coordinating Board, the Energy Research and Applications Program and the Advanced Technology Program for the State of Texas. Additional student funding was provided by R. Lynette and Associates, the Department of Energy Minorities Undergraduate Training and Education Program administered by the Center for Environmental Resource Management on the UTEP campus.
|Number of pages||1|
|State||Published - 1994|
|Event||Proceedings of the Energy-Sources Technology Conference - New Orleans, LA, USA|
Duration: Jan 23 1994 → Jan 26 1994
|Conference||Proceedings of the Energy-Sources Technology Conference|
|City||New Orleans, LA, USA|
|Period||01/23/94 → 01/26/94|