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    • 4. 发明公开
    • METHOD FOR CONTROLLING POWER GENERATION DEVICE AND PUMPED-STORAGE POWER GENERATION DEVICE
    • EP4213369A1
    • 2023-07-19
    • EP20953325.6
    • 2020-09-11
    • Hitachi Mitsubishi Hydro Corporation
    • YOSHIDA, Masahiro
    • H02P9/04H02P9/14
    • A method of controlling a power generation apparatus and a pumped storage power generation apparatus including a motor directly connected to a rotor of a generator or generator motor, the method performing speed control by providing a guide vane opening degree command to the motor, the guide vane opening degree command being calculated by a rotational speed controller including a proportional control element, an integral control element, and a differential control element, in which a first upper limit limiting function is multiplied by a second upper limit limiting function, the first upper limit limiting function being included in an output runaway prevention circuit of an integral control function provided in the integral control element and being defined according to an output signal of a load limiter, the second upper limit limiting function being defined according to a rotational speed deviation and changing within a range up to a constant value equal to or less than 1 according to a difference between a rotational speed corresponding to the frequency of the commercial power system and a rotational speed of the rotor, in a case where the rotational speed of the rotor exceeds a rotational speed, an output of a guide vane opening degree command according to an output of an accumulation in the integral control function is limited. In addition, a difference between the integral control function and an output value of the runaway prevention circuit is fed back to an input of the integral control function and is subtracted from a rotational speed deviation to forcibly decrease the accumulation in the integral control function.
    • 5. 发明公开
    • CONTROL DEVICE FOR POWER GENERATION DEVICE
    • EP4120552A1
    • 2023-01-18
    • EP21766838.3
    • 2021-02-16
    • NTN Corporation
    • ONO, Kouhei
    • H02P9/00H02P9/04
    • A power generation system (1) includes a wind power generation device (10), a control device (20), and a power supply target (30). In power generation system (1), control device (20) performs power conversion to a power generated by wind power generation device (10), and supplies the converted power to a power supply target (30). Control device (20) has a reference map (232) for controlling a power conversion device (21) of the control device. Reference map (232) is a map indicating a relationship between an input voltage to the control device (power conversion device) and an output power from the control device (power conversion device). When a start condition is satisfied, control device (20) executes correction control for correcting reference map (232), and searches for a point at which an output power of power generation system (1) is maximized while shifting the output voltage of a generator (14) by MPPT control. Control device (20) corrects reference map (232) on the basis of a result of the search.