Power generation apparatus using permanent-magnet generator
AssigneeHitachi, Ltd.
InventorsHironari Kawazoe, Motoo Futami, Akira Kikuchi
Life of this patent
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Abstract
A power generation apparatus includes a permanent-magnet AC generator, a first converter for converting AC power into DC power, and a second converter for converting the DC power produced by the first converter into AC power. The first converter includes a unit for controlling active power and a unit for controlling reactive power and the second converter includes a unit for controlling a voltage of a DC system and reactive power or AC voltage of a power system.
Claims10
A method of controlling a power generation apparatus including a permanent-magnet generator for generating AC power driven by a gas turbine as a power source, a first converter for converting the AC power generated by said generator into DC power, and a second converter for converting the DC power produced by said first converter into AC power, said method comprising:
- a voltage command value setting circuit determining a voltage command value based on rotational speed of said generator;
- inputting a difference between a terminal voltage of said generator and said voltage command value into a voltage control circuit;
- inputting an output from said voltage control circuit and an output from an active power control circuit into a converter control unit;
- and
- said converter control unit outputting control pulses for controlling said first converter, based on said outputs from said voltage control circuit and said active power control circuit.
A method of controlling a power generation apparatus including a permanent-magnet generator for generating AC power driven by a gas turbine as a power source, a first converter for converting the AC power generated by said generator into DC power, and a second converter for converting the DC power produced by said first converter into AC power, said method comprising:
- a voltage command value setting circuit determining a voltage command value based on an active power command value;
- inputting a difference between a terminal voltage of said generator and said voltage command value into a voltage control circuit;
- inputting an output from said voltage control circuit and an output from an active power control circuit into a converter control unit;
- and
- said converter control unit outputting control pulses for controlling said first converter, based on said outputs from said voltage control circuit and said active power control circuit.
A computer readable medium encoded with a program for controlling a power generation apparatus including a permanent-magnet generator for generating AC power driven by a gas turbine as a power source, a first converter for converting the AC power generated by said generator into DC power, and a second converter for converting the DC power produced by said first converter into AC power, said program embodying a method comprising:
- a voltage command value setting unit determining a voltage command value based on rotational speed of said generator;
- inputting a difference between a terminal voltage of said generator and said voltage command value into a voltage control unit;
- inputting an output from said voltage control unit and an output from an active power control unit into a converter control unit;
- and
- said converter control unit outputting control pulses for controlling said first converter, based on said outputs from said voltage control unit and said active power control unit.
A computer readable medium encoded with a program for controlling a power generation apparatus including a permanent-magnet generator for generating AC power driven by a gas turbine as a power source, a first converter for converting the AC power generated by said generator into DC power, and a second converter for converting the DC power produced by said first converter into AC power, said program embodying a method comprising:
- a voltage command value setting unit determining a voltage command value based on an active power command value;
- inputting a difference between a terminal voltage of said generator and said voltage command value into a voltage control unit;
- inputting an output from said voltage control unit and an output from an active power control unit into a converter control unit;
- and
- said converter control unit outputting control pulses for controlling said first converter, based on said outputs from said voltage control unit and said active power control unit.
Dependencies are inferred from the claim text.