Gas-turbine power generating installation and method of operating the same

A gas-turbine power generating installation including a gas turbine installed in the vicinity of an overage gas field or an oil field and generating electric power with said gas turbine by using natural gas produced in the overage gas field or accompanying gas produced in the oil field, the generated electric power being supplied to a consuming site,

• wherein said gas turbine is a gas turbine in which air compressed by a compressor is introduced to a combustor for combustion after being mixed with fuel, a turbine is driven by generated combustion gas, and a power generator is driven by motive power obtained from a rotary shaft of said gas turbine,
• said installation further includes a boosting compressor driven by the motive power obtained from the rotary shaft of said gas turbine, and
• the natural gas or the accompanying gas is boosted in pressure by said boosting compressor and supplied as fuel to said combustor,
• said gas-turbine power generating installation further including:
• a fuel flow adjusting valve disposed in a line extending from an outlet of said boosting compressor to said combustor in said gas turbine;
• a tank;
• a line connecting an intermediate point between the outlet of said boosting compressor and said fuel flow adjusting valve to said tank;
• and
• an on/off valve disposed in the line connected to said tank.

A gas-turbine power generating installation including a gas turbine installed in the vicinity of an overage gas field or an oil field and generating electric power with said gas turbine by using natural gas produced in the overage gas field or accompanying gas produced in the oil field, the generated electric power being supplied to a consuming site,

• wherein said gas turbine is a gas turbine in which air compressed by a compressor is introduced to a combustor for combustion after being mixed with fuel, a turbine is driven by generated combustion gas, and a power generator is driven by motive power obtained from a rotary shaft of said gas turbine,
• said installation further includes a boosting compressor driven by the motive power obtained from the rotary shaft of said gas turbine, and
• the natural gas or the accompanying gas is boosted in pressure by said boosting compressor and supplied as fuel to said combustor,
• said gas-turbine power generating installation further including:
• an air line extending from an outlet or an intermediate position of said compressor in said gas turbine to an inlet of said boosting compressor;
• an air supply valve disposed in said air line;
• and
• a switching valve disposed on the inlet side of said boosting compressor upstream of a joint position of said air line.

A gas-turbine power generating installation including a gas turbine installed in the vicinity of an overage gas field or an oil field and generating electric power with said gas turbine by using natural gas produced in the overage gas field or accompanying gas produced in the oil field, the generated electric power being supplied to a consuming site,

• wherein said gas turbine is a gas turbine in which air compressed by a compressor is introduced to a combustor for combustion after being mixed with fuel, a turbine is driven by generated combustion gas, and a power generator is driven by motive power obtained from a rotary shaft of said gas turbine,
• said installation further includes a boosting compressor driven by the motive power obtained from the rotary shaft of said gas turbine, and
• the natural gas or the accompanying gas is boosted in pressure by said boosting compressor and supplied as fuel to said combustor,
• said gas-turbine power generating installation further including:
• a bypass line connecting an inlet and an outlet of said boosting compressor in said gas turbine;
• a startup fuel gas supply valve disposed in said bypass line;
• and
• pressure gauges for measuring an inlet pressure and an outlet pressure of said boosting compressor.

A gas-turbine power generating installation including a gas turbine installed in the vicinity of an overage gas field or an oil field and generating electric power with said gas turbine by using natural gas produced in the overage gas field or accompanying gas produced in the oil field, the generated electric power being supplied to a consuming site,

• wherein said gas turbine is a gas turbine in which air compressed by a compressor is introduced to a combustor for combustion after being mixed with fuel, a turbine is driven by generated combustion gas, and a power generator is driven by motive power obtained from a rotary shaft of said gas turbine,
• said installation further includes a boosting compressor driven by the motive power obtained from the rotary shaft of said gas turbine, and
• the natural gas or the accompanying gas is boosted in pressure by said boosting compressor and supplied as fuel to said combustor,
• said gas-turbine power generating installation further including:
• a bypass line connecting an inlet and an outlet of said boosting compressor in said gas turbine;
• a startup fuel gas supply valve disposed in said bypass line;
• and
• a tachometer for detecting a rotation speed of a shaft of said boosting compressor, said turbine or said power generator.

A gas-turbine power generating installation including a gas turbine installed in the vicinity of an overage gas field or an oil field and generating electric power with said gas turbine by using natural gas produced in the overage gas field or accompanying gas produced in the oil field, the generated electric power being supplied to a consuming site,

• wherein said gas turbine is a gas turbine in which air compressed by a compressor is introduced to a combustor for combustion after being mixed with fuel, a turbine is driven by generated combustion gas, and a power generator is driven by motive power obtained from a rotary shaft of said gas turbine,
• said installation further includes a boosting compressor driven by the motive power obtained from the rotary shaft of said gas turbine, and
• the natural gas or the accompanying gas is boosted in pressure by said boosting compressor and supplied as fuel to said combustor,
• said gas-turbine power generating installation further including:
• a bypass line connecting an inlet and an outlet of said boosting compressor in said gas turbine;
• and
• a startup fuel gas boosting compressor and a startup fuel gas supply valve both disposed in said bypass line.

A gas-turbine power generating installation including a gas turbine installed in the vicinity of an overage gas field or an oil field and generating electric power with said gas turbine by using natural gas produced in the overage gas field or accompanying gas produced in the oil field, the generated electric power being supplied to a consuming site,

• wherein said gas turbine is a gas turbine in which air compressed by a compressor is introduced to a combustor for combustion after being mixed with fuel, a turbine is driven by generated combustion gas, and a power generator is driven by motive power obtained from a rotary shaft of said gas turbine,
• said installation further includes a boosting compressor driven by the motive power obtained from the rotary shaft of said gas turbine, and
• the natural gas or the accompanying gas is boosted in pressure by said boosting compressor and supplied as fuel to said combustor,
• said gas-turbine power generating installation further including:
• an anti-surge line extending to an inlet of said boosting compressor from an intermediate point of a line extending from an outlet of said boosting compressor to said combustor in said gas turbine;
• and
• an anti-surge valve disposed in said anti-surge line.