초록 ▼

The present invention relates to a method of controlling the operation of large rotary machines such as steam turbines and generators in a thermal power plant or nuclear power plant. More specifically, the invention relates to a method of controlling such operation as increasing or decreasing the sp

The present invention relates to a method of controlling the operation of large rotary machines such as steam turbines and generators in a thermal power plant or nuclear power plant. More specifically, the invention relates to a method of controlling such operation as increasing or decreasing the speed of the rotary machines or stopping the operation of the rotary machines, by detecting vibration at the time of starting the operation or during the steady-speed operation, by analyzing the detected vibration signals to determine whether the operation is in normal condition or abnormal condition, and by detecting or forecasting the cause in case the operation is in abnormal condition.

대표청구항 ▼

A method of controlling a build-up speed of a rotary machine with a vibration-monitoring system comprising a vibration-responsive means preferably containing at least one vibration transducer mounted on a bearing, a running speed detector which transduces signals responding to the rotary machine spe

A method of controlling a build-up speed of a rotary machine with a vibration-monitoring system comprising a vibration-responsive means preferably containing at least one vibration transducer mounted on a bearing, a running speed detector which transduces signals responding to the rotary machine speed, a diagnosing device with a frequency analyzer which analyzes a vibration signal from the vibration transducer, and a speed regulator which controls the speed of the rotary machine responding to demand signals as a result of the vibration frequency analysis, comprising: a first step of discriminating in which speed region a running speed of the rotary machine lies among a plurality of predetermined speed regions which are obtained by dividing the speed range, from start up to rated speed of the rotary machine, into critical speeds, a second step of calculating harmonic components of a frequency spectrum which are predetermined in the respective divided speed regions, a third step of discriminating as to which one of a plurality of predetermined operating patterns corresponds to said calculated harmonic components of the frequency spectrum, which patterns include a speed raising region and a speed lowering region, which are closely related with components of rotation frequency, and a fourth step of performing a predetermined speed control operation of the rotary machine depending on the discrimination result in said third step.