Gas turbine allowing hydrogen to be used as fuel

A gas turbine comprising:

• a combustor configured such that fuel and compressed air to be combusted are supplied to the combustor;
• a fuel supply controller configured to control a fuel quantity that is supplied to the combustor;
• and
• a load controller configured to control a magnitude of a load that acts on a turbine shaft, wherein:
• a compressed air quantity that is supplied to a primary combustion field in the combustor when a rotation speed of the turbine shaft is a predetermined rotation speed is a quantity that causes an equivalent ratio at the primary combustion field to be an equivalent ratio that allows misfire to be avoided in an operation state with a predetermined rotation speed and a predetermined load;
• the fuel supply controller is configured to start fuel supply to the combustor when rotation of the turbine shaft is started up;
• the fuel supply controller is configured to control the fuel quantity that is supplied to the combustor, such that the rotation speed of the turbine shaft rises to the predetermined rotation speed, after ignition within the combustor;
• and
• the load controller is configured to start increase in the magnitude of the load to the predetermined load, before the rotation speed of the turbine shaft reaches the predetermined rotation speed.