Abstract: A power supply system for supplying power to a load is provided. The system comprises power-line carriers for supplying power to the load, and a plurality of power supply units the outputs of which are parallelly connected to power-line carriers. Each of the power supply unit comprises a generator; an inverter for converting a voltage generated by the generator into an AC voltage and outputting the AC voltage; an inverter control unit for controlling the inverter, and a connection apparatus for connecting the AC voltage outputted from the inverter to the power-line carriers. The inverter controller comprises a load sharing adjuster for adjusting a shared load current supplied from the power supply unit, so that at least one of the power supply units in operation can operated at its rating condition, thereby realizing an efficiency operation.

Abstract: To provide an interconnecting power generation system which can detect an abnormality in the utility power supply and can be isolated from a utility power system and can prevent damage to a turbogenerator.

Abstract: A gas turbine apparatus is provided which comprises a turbine, a combustor for burning a mixture of air and fuel and providing the turbine with a combustion gas to drive it, a generator connected to the turbine to receive rotational force therefrom to generate electric power, a temperature sensor for measuring a temperature of an exhaust gas from the turbine, a temperature setting unit and a power setting unit.

Abstract: A gas turbine apparatus has a combustor 2 for combusting fuel to produce a combustion gas, a turbine 1 which is rotated by the combustion gas, an electric generator 5 coupled to the turbine 1, and a fuel flow control valve 10 configured to change an opening thereof The gas turbine apparatus includes a first PID processing unit 16 to adjust the opening of the fuel flow control valve 10 so as to maintain a rotational speed of the turbine 1 substantially at a constant value, and a second PID processing unit 17 to adjust the opening of the fuel flow control valve 10 so as to maintain a temperature of a discharged combustion gas at temperatures lower than a predetermined temperature. The gas turbine apparatus has an electric power controller 21 to control electric power to be generated by the electric generator 5 based on output values of the first PID processing unit 16 and the second PID processing unit 17.

Abstract: A power supply system for supplying power to a load is provided. The system comprises power-line carriers for supplying power to the load, and a plurality of power supply units the outputs of which are parallelly connected to power-line carriers. Each of the power supply unit comprises a generator; an inverter for converting a voltage generated by the generator into an AC voltage and outputting the AC voltage; an inverter control unit for controlling the inverter, and a connection apparatus for connecting the AC voltage outputted from the inverter to the power-line carriers. The inverter controller comprises a load sharing adjuster for adjusting a shared load current supplied from the power supply unit, so that at least one of the power supply units in operation can operated at its rating condition, thereby realizing an efficiency operation.

Abstract: A gas turbine starting method, comprising the steps of rotatively driving a turbine by a motor coupled to the turbine, while at the same time supplying a compressed air to a combustor by an air compressor operating in interlocking motion with the turbine, starting a fuel supply to the combustor when a revolution speed of the turbine has reached up to a predetermined value, and simultaneously starting an igniting operation on an air-fuel mixture in the combustor, wherein at least during the igniting operation to the air-fuel mixture in the combustor, a quantity of fuel supply per unit time to the combustor is increased while increasing the revolution speed of the turbine, to thereby ensuring the ignition of the air-fuel mixture under various conditions, and depressing the temperature rise of the gas turbine, which may otherwise occur immediately after the ignition.

Abstract: A power generating apparatus has a power generator 4 for generating AC power, a gas turbine engine 2 for driving the power generator 4, and an inverter device 5 for converting the AC power into commercial AC power. The power generating apparatus includes an interconnection switch S1 for connecting an output of the inverter device 5 with a commercial AC power supply system, a first voltage detector 46 for detecting a DC power supply voltage Vdc-in of the inverter device 5, and a second voltage detector 33, 45 for detecting a full-wave rectification voltage of the commercial AC power supply system. The power generating apparatus also includes an interconnection control part 18 for closing the interconnection switch S1 when the DC power supply voltage of the inverter device 5 exceeds the full-wave rectification voltage of the commercial AC power supply system.

Abstract: A gas turbine apparatus is provided wherein a turbine is driven or rotated by burning a mixture of a fuel and compressed air and supplying a combustion gas generated by the combustion. A flameout determination unit is provided in the apparatus which is adapted to calculate the air/fuel ratio in the air/fuel mixture, correct the calculated air/fuel ratio to calculate a corrected air/fuel ratio which is substantially constant, compare the calculated corrected air/fuel ratio with a predetermined reference air/fuel ratio, and generate a signal indicative of occurrence of a flameout when the corrected air/fuel ratio is smaller than the reference air/fuel ratio.

Abstract: To provide an interconnecting power generation system which can detect an abnormality in the utility power supply and can be isolated from a utility power system and can prevent damage to a turbogenerator.

Abstract: A gas turbine starting method, comprising the steps of rotatively driving a turbine by a motor coupled to the turbine, while at the same time supplying a compressed air to a combustor by an air compressor operating in interlocking motion with the turbine, starting a fuel supply to the combustor when a revolution speed of the turbine has reached up to a predetermined value, and simultaneously starting an igniting operation on an air-fuel mixture in the combustor, wherein at least during the igniting operation to the air-fuel mixture in the combustor, a quantity of fuel supply per unit time to the combustor is increased while increasing the revolution speed of the turbine, to thereby ensuring the ignition of the air-fuel mixture under various conditions, and depressing the temperature rise of the gas turbine, which may otherwise occur immediately after the ignition.

Abstract: A gas turbine apparatus is provided which comprises a turbine, a combustor for burning a mixture of air and fuel and providing the turbine with a combustion gas to drive it, a generator connected to the turbine to receive rotational force therefrom to generate electric power, a temperature sensor for measuring a temperature of an exhaust gas from the turbine, a temperature setting unit and a power setting unit.

Abstract: A power generating apparatus has a power generator 4 for generating AC power, a gas turbine engine 2 for driving the power generator 4, and an inverter device 5 for converting the AC power into commercial AC power. The power generating apparatus includes an interconnection switch S1 for connecting an output of the inverter device 5 with a commercial AC power supply system, a first voltage detector 46 for detecting a DC power supply voltage Vdc-in of the inverter device 5, and a second voltage detector 33, 45 for detecting a full-wave rectification voltage of the commercial AC power supply system. The power generating apparatus also includes an interconnection control part 18 for closing the interconnection switch S1 when the DC power supply voltage of the inverter device 5 exceeds the full-wave rectification voltage of the commercial AC power supply system.

Abstract: A gas turbine apparatus is provided which prevents a sudden rise in temperature in the event of changing a speed such as upon start-up, thereby obviating a reduction in lifetime. The apparatus comprises a rotational speed control unit, acceleration control unit, low signal selector, and an opening operating unit. The rotational speed control unit receives a current rotational speed and a predetermined target rotational speed of a turbine, and processes them to output a control signal indicative of an opening degree of a fuel control valve to make the turbine rotate at the target rotational speed. The target rotational speed is set as a predetermined downwardly convex monotone increasing function having an elapsed time as a variable during a start-up period to rated condition.

Abstract: A gas turbine apparatus has a combustor 2 for combusting fuel to produce a combustion gas, a turbine 1 which is rotated by the combustion gas, an electric generator 5 coupled to the turbine 1, and a fuel flow control valve 10 configured to change an opening thereof The gas turbine apparatus includes a first PID processing unit 16 to adjust the opening of the fuel flow control valve 10 so as to maintain a rotational speed of the turbine 1 substantially at a constant value, and a second PID processing unit 17 to adjust the opening of the fuel flow control valve 10 so as to maintain a temperature of a discharged combustion gas at temperatures lower than a predetermined temperature. The gas turbine apparatus has an electric power controller 21 to control electric power to be generated by the electric generator 5 based on output values of the first PID processing unit 16 and the second PID processing unit 17.

Abstract: A radial magnetic bearing apparatus suspends a rotating shaft and stably operates at a level exceeding a bending intrinsic vibration value of the rotating shaft by controlling magnetic forces generated by control coils wound around control magnetic poles. Grooves are provided on the surface of each control magnetic pole facing the rotating shaft, and sensor coils are wound to pass through the grooves in order to detect the position of the rotating shaft in the radial direction. A part of each control magnetic pole may be used as magnetic poles of an inductance-type displacement sensor.