SHAFT TORSIONAL VIBRATION RESTRAINING DEVICE FOR TURBINE GENERATOR

摘要

PURPOSE:To easily restrain a shaft torsional vibration without using a large advance compensation function by inputting an angular velocity signal obtained from a simulation device to the excitation device of a turbine generator to restrain the shaft torsional vibration. CONSTITUTION:A stimulation device B for the shaft torsional vibration of a turbine generator 3 is provided wherein the behavior in respective modes of shaft torsional vibration is represented by a modal model for simulating the behavior with a secondary function. The dummy device B is made to be correctly reacted always by inputted the difference between the angular velocity signals DELTAomega1 and DELTAomega2 obtained from the simulation device B and the angular velocity signals DELTAomega1 and DELTAomega2 directly measured from a shaft system A. Only a desired shaft torsional vibration mode is thus controlled by using the angular velocity signals DELTAomega1 and DELTAomega2 obtained from the simulation device B. Consequently, the shaft torsional vibration can be easily restrained without using a large advance compensation function.