Stability analysis of a variable-speed wind turbine
This paper examines the elastomechanical stability of a four-bladed wind turbine over a specific rotor speed range. Stability modes, frequencies, and dampings are extracted using a specialized modal processor developed at NREL that post-processes the response data generated by the ADAMS simulation code. The processor can analyze a turbine with an arbitrary number of rotor blades and offers a novel capability of isolating stability modes that become locked at a single frequency. Results indicate that over a certain rotor speed range, the tower lateral mode and the rotor regressive in-plane mode coalesce, resulting in a self-excited instability. Additional results show the effect of tower and nacelle parameters on the stability boundaries.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
- DOE Contract Number:
- AC36-83CH10093
- OSTI ID:
- 420360
- Report Number(s):
- NREL/CP-440-21679; CONF-970135-12; ON: DE97000075; TRN: 97:000737
- Resource Relation:
- Conference: 16. American Society of Mechanical Engineers wind energy symposium, Reno, NV (United States), 6-9 Jan 1997; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stability of large horizontal-axis axisymmetric wind turbines
Theoretical analysis of acceleration measurements in a model of an operating wind turbine.