Vibration Monitoring System
All power generating units consist of primary or major machinery and secondary or BOP machinery. With little exception, all major machinery is monitored with a permanently installed continuous monitoring system.
Most plants monitor their BOP machinery on a periodic basis using a portable data collector and database program. The continuous monitoring system for a medium or large steam turbine generator is called a Turbine Supervisory Instrumentation System (TSI System).
A TSI System includes the typical radial displacement vibration and axial position measurements associated with high speed
vibration rotating machinery but also includes measurements that are unique to the long and heavy rotors and machine cases required for steam turbines. Among these are; case expansion, differential expansion, run out (shaft bow), zero speed, valve position, and absolute shaft vibration.