Resolve 60 MW LMZ Steam Turbine Trip Issue During Cooling Water Pump Changeover

Steam turbine reliability depends upon the combined stability of the steam path, condenser system, lubrication system, rotor-bearing dynamics, and protection system. A trip of a 60 MW condensing steam turbine occurred during a routine cooling water (CW) pump changeover operation. Initial investigation identified condenser vacuum may deterioration following temporary reduction in cooling water flow. However, detailed analysis of turbine vibration trends revealed a delayed increase in rear bearing