Variable flow compressor of a gas turbine

A gas turbine system comprising:

• a combustor configured to burn a fuel and air mixture;
• a fuel gas compressor configured to compress gas fuel, wherein the fuel gas compressor comprises a rotary compressor;
• and
• a controller comprising:
• a processor configured to control the fuel gas compressor;
• and
• memory storing instructions that cause the processor to:
• vary a discharge pressure from the fuel gas compressor based at least in part on load demand for the gas turbine system, wherein the load demand comprises a load demand on a generator of the gas turbine system;
• and
• limit the discharge pressure to a value above a minimum threshold.

A non-transitory, computer-readable memory storing instructions which when executed are configured to cause a processor to:

• receive an indication of a load demand for a gas turbine system, wherein the load demand comprises a load demand on a generator of the gas turbine system;
• set a discharge pressure of a compressor of the gas turbine system based at least in part on the indication, wherein the compressor comprises a rotary compressor;
• and
• limit the discharge pressure to a value above a pressure differential across the compressor that is sufficient to flow lubricant through the compressor.