Effect of clearing short circuits and automatic reclosing on torsional stress and life expenditure of turbine-generator shafts
Effect of clearing short circuits and automatic reclosing on torsional stress and life expenditure of turbine-generator shafts
复制标题
清除短路和自动重合闸对汽轮发电机轴扭应力和寿命消耗的影响
DOI：
--
复制
发表时间：
1976
期刊：
影响因子：
--
通讯作者：
L. T. Rosenberg
中科院分区：
文献类型：
--
作者：
A. Abolins;D. Lambrecht;John S. Joyce;L. T. Rosenberg
Recent concern over abnormal stresses imposed on the shafts of large turbine-generators, due to high speed switching of network faults, has led to intensive investigation of this phenomenon. Elaborate computer programs were developed for simulated model studies which revealed that hitherto unexpectedly high shaft stresses can occur merely by tripping a three-phase short circuit near the power station at an unfavorable instant. The effects of circuit breaker reclosing, both successful and unsuccessful, were also investigated together with those due to faulty synchronizing. Test data on a 780 MVA unit gained by telemetric means verified the calculated torques and established the damping coefficients in a running unit. The adverse influence of numerous repetitive instances of such over-stressing on life expenditure of rotor materials is being evaluated.
