Stressing of Large Turbine-Generators at Shaft Couplings and LP Turbine Final-Stage Blade Roots Following Clearance of Grid System Faults and Faulty Synchronisation
- 1 July 1980
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems
- Vol. PAS-99 (4) , 1652-1662
- https://doi.org/10.1109/tpas.1980.319591
Abstract
The paper examines transient torque phenomena which can arise at LP turbine blade roots and at shaft couplings of large synchronous-generators following a grid network disturbance. Fault clearance and faulty synchronisations for two 3000 rpm 660 MW turbines and a 3600 rpm, 300 MW turbine is examined. Peak torque at various shaft locations and at the LP turbine final-stage blade roots is computed as a function of the fault clearing time or the synchronising angle respectively. Stresses induced at LP turbine blade roots where the shaft system is protected against excessive stress by use of a turbine/generator shearing coupling is examined for one turbine only. Sustained 3-phase and line-to-line faults at the generator stator terminals are also considered.Keywords
This publication has 2 references indexed in Scilit:
- Shaft torques during out-of-phase synchronizationIEEE Transactions on Power Apparatus and Systems, 1977
- Comparisons of synchronous-machine models in the study of the transient behaviour of electrical power systemsProceedings of the Institution of Electrical Engineers, 1971