Fault Diagnosis for Steam-flow Exciting Vibration of Ultra Supercritical1000 MW Steam Turbine

With the increase of thermal power capacity, ultra supercritical units have become the mainstream of power industry. At the same time, with the improvement of the steam parameters and the shafting lengthened, making the steam flow excited vibration frequently happen in the ultra supercritical units, which will seriously affect the reliability of the unit. This paper takes steam flow excited vibration of a 1000MW turbine as an example, according to the experimental and theoretical causes of steam flow excited vibration, so as to solve the steam flow excited vibration by the proposed treatment plan, the reliability of operation and the units with high load capacity can also be greatly improved.