Independently-controlled gas turbine inlet guide vanes and variable stator vanes

A gas turbine comprising:

• a compressor receiving inlet air and mixing the inlet air with fuel;
• a combustor that receives the inlet air and fuel mixture and that combusts the mixture to produce hot products of combustion;
• and
• a turbine receiving the hot products of combustion and converting the hot products of combustion into work,
• the compressor including a set of inlet guide vanes (IGVs) and a set of variable stator vanes (VSVs), wherein respective positions of the IGVs and the VSVs affect a performance efficiency of the gas turbine, and the compressor including a system for adjusting the positions of the set of IGVs and the set of VSVs, the system includes:
• a hydraulic power unit providing a supply of hydraulic fluid,
• an IGV servo in fluid communication with the hydraulic power unit,
• a VSV servo in fluid communication with the hydraulic power unit,
• an IGV cylinder set in fluid communication with the hydraulic power unit via the IGV servo and connected to the IGVs, the IGV cylinder set effecting tandem displacement of the IGVs between a closed position and a fully open position,
• a VSV cylinder set in fluid communication with the hydraulic power unit via the VSV servo, the VSV cylinder set being separate and independent from the IGV cylinder set, the VSVs including the second set of vanes across multiple stages linked together with a torque shaft, wherein VSV cylinder set is connected to the torque shaft, and wherein the VSV cylinder set effects simultaneous displacement of the stages of the VSVs between a closed position and a fully open position,
• wherein the IGV servo and the VSV servo respectively control delivery of hydraulic fluid from the hydraulic power unit to the IGV cylinder set and the VSV cylinder set, and wherein the IGV servo and the VSV servo are independently controllable, and
• trip valves cooperable with each of the IGV servo and the VSV servo, each of the trip valves being activated to bypass the IGV and VSV servos, respectively, and close the IGVs and the VSVs.