System and method for turbomachinery vane diagnostics

Tangible, non-transitory, and computer-readable medium storing instructions thereon, wherein the instructions, when executed, are configured to cause a processor to:

• drive a first positioner of a first actuator of vanes of turbomachinery in an operation mode based at least in part on a set point of the turbomachinery;
• set a second positioner of a second actuator of the vanes in a diagnostic mode rather than the operation mode, wherein the diagnostic mode comprises backdriving the second actuator against the first actuator;
• obtain data from the first positioner and the second positioner, wherein the data indicates operating conditions of the turbomachinery;
• and
• control the turbomachinery based at least in part on the operating conditions of the turbomachinery.

A turbine system comprising:

• a compressor comprising:
• a plurality of inlet guide vanes (IGV) each with a variable IGV pitch and each guiding incoming fluid into the compressor;
• and
• a plurality of variable stator vanes (VSV) each with a variable VSV pitch and each controlling flow of fluid through the compressor;
• a first IGV actuator configured to control pitch of the each of the IGVs of the plurality of IGVs;
• a second IGV actuator configured to control pitch of the each of the IGVs of the plurality of IGVs;
• a first VSV actuators configured to control pitch of each of the VSVs of the plurality of VSVs;
• a second VSV actuators configured to control pitch of each of the VSVs of the plurality of VSVs;
• a plurality of positioners each configured to respectively position the first IGV actuator, the second IGV actuator, the first VSV actuator, or the second VSV actuator to control the pitch of the IGVs or VSVs, respectively;
• a controller system communicably coupled to the plurality of positioners, wherein the controller system is configured to:
• drive a first positioner of the plurality of positioners in a drive mode based at least in part on a set point of the turbine system;
• place a second positioner in a diagnostic mode rather than the drive mode wherein the diagnostic mode comprises driving the second actuator at a lower power level than used to drive the first actuator;
• obtain data from the first positioner and the second positioner, wherein the data indicates wear of the second positioner and its associated actuator.