Gas turbine apparatus and a starting method thereof

A gas turbine apparatus comprising:

• a motor for rotatively driving a turbine;
• a motor control section for controlling a revolution speed of said motor;
• a combustor for burning an air-fuel mixture thereby generating a combustion gas therein;
• an air compressor for supplying a compressed air to said combustor, said compressor operating in interlocking motion with said turbine;
• and
• a fuel flow control valve for controlling a quantity of fuel supply per unit time to said combustor;
• wherein at least during an igniting operation for the air-fuel mixture in said combustor, and prior to a time when the air-fuel mixture in said combustor begins to ignite, a quantity of fuel supply per unit time to said combustor is increased through said fuel flow control valve while increasing a revolution speed of said turbine by said motor through control of said motor control section.

A starting method of a gas turbine apparatus comprising the steps of:

• igniting a mixture of fuel and air while rotatively driving a turbine by a motor, to combust said mixture;
• and
• supplying a combustion gas generated by said combustion to said turbine thereby increasing a revolution speed of said turbine;
• wherein for a predetermined time period immediately after the mixture begins to ignite, a quantity of fuel supply per unit time provided for the combustion is held to be constant.

A gas turbine apparatus in which a mixture of air and fuel is combusted and a combustion gas generated by said combustion is supplied to a turbine to rotatively drive said turbine, said apparatus comprising:

• an ignition means for performing an igniting operation on the air-fuel mixture while rotatively driving said turbine by a motor during starting operation;
• a fuel flow control valve of variable opening for controlling a quantity of fuel supply per unit time to be provided for the combustion;
• an ignition detecting means for detecting an ignition of the air-fuel mixture;
• and
• an opening holding means for holding the opening of said fuel flow control valve to be constant for a predetermined time period immediately after the beginning of ignition of the air-fuel mixture has been detected by said ignition detecting means.