Important Parameters in Considering Transient Torques on Turbine-Generator Shaft Systems

The analysis of the response of a turbine-generator unit´s rotor system to an electrical system disturbance requires complex models of both the electric network and mechanical system. The significant parameters for both these models are discussed and illustrated using simplified transmission system models. The effects of higher frequency electrical torque components are shown to be dominant factors in determining the stress on small components such as turbine blades while the lower frequency components provide the main stimulus to the main shaft sections.