System and method for detection of rotor eccentricity baseline shift

A method to determine eccentricity of a rotor in a turbine comprising:

• collecting sensor data of rotor eccentricity for a time period corresponding to a variety of turbine operations;
• filtering the sensor data to extract sensor data corresponding to turbine startup operations;
• establishing a baseline eccentricity value using the filtered sensor data corresponding to a selected startup operation;
• determining an eccentricity value using the filtered sensor data for each of a plurality of startup operations subsequent to the selected startup operation;
• determining a rotor eccentricity difference between the baseline eccentricity value and each of the eccentricity values for the plurality of startup operations subsequent to the selected startup operation, and
• reporting a rotor eccentricity condition based on the rotor eccentricity difference.

A system to determine eccentricity of a rotor in a turbine comprising:

• a rotor eccentricity sensor monitoring rotor eccentricity and generating rotor eccentricity data;
• a computer system including:
• a database storing the rotor eccentricity data for a period corresponding to a variety of turbine operations;
• a data filter extracting rotor eccentricity data corresponding to turbine startup operations from the rotor eccentricity data and generating filtered sensor data;
• an algorithm establishing a baseline eccentricity value using the filtered sensor data corresponding to a selected startup operation;
• an algorithm establishing an eccentricity value using the filtered sensor data for each of a plurality of startup operations subsequent to the selected startup operation;
• an algorithm determining a rotor eccentricity difference between the baseline eccentricity value and each of the eccentricity values for the plurality of startup operations subsequent to the selected startup operation, and
• an report generator to issue reports of a rotor eccentricity condition based on the rotor eccentricity difference.