公开(公告)号：US20210083475A1

公开(公告)日：2021-03-18

申请号：US16618816

申请日：2018-04-10

Applicant: Hitachi, Ltd.

Inventor： Kenta KIRIHARA ,  Sumito TOBE ,  Masahiro YATSU ,  Hiroo HORII ,  Jun YAMAZAKI

IPC: H02J3/00

Abstract: A system operation support device in a power system stabilizes the power system and has a predicted accident time system state calculation unit that receives measured data, a system topology, and a target accident type as inputs, and calculates a system state and a predicted accident time system state. A control menu calculation unit receives the results of the predicted accident time system state as inputs and calculates a control menu. A restoration control means calculation unit receives the result of the control menu calculation as an input and calculates a restoration control procedure. A restoration prevention control procedure calculation unit receives the result of the restoration control and a target restoration time parameter as inputs and performs a power generator output adjustment time simulation, a necessary prevention control amount calculation, and a prevention control procedure calculation. A display unit displays the restoration control procedure and the prevention control procedure.

公开(公告)号：US20210126453A1

公开(公告)日：2021-04-29

申请号：US17047158

申请日：2019-03-11

Applicant: HITACHI, LTD.

Inventor： Kenta KIRIHARA ,  Akira TSUBOTA ,  Yutaka KOKAI ,  Sumito TOBE ,  Masahiro YATSU ,  Hiroo HORII

IPC: H02J3/06 ,  H02J13/00

Abstract: This power system operation assisting device is provided with: a multiple signal frequency specifying unit that uses, as inputs, measured data of an object to be measured and a frequency specifying parameter for calculating a frequency component of the measured data to calculate an oscillation frequency; a generation source candidate calculation unit that uses, as an input, the calculated oscillation frequency to calculate a generation source candidate of an unstable oscillation occurring in a power system; a generation source guarantee test unit that calculates the guarantee test result of the generation source candidate; and a display unit that displays the oscillation frequency, the generation source candidate, and the guarantee test result.

公开(公告)号：US20200273120A1

公开(公告)日：2020-08-27

申请号：US16334401

申请日：2017-02-24

Applicant: Hitachi, Ltd.

Inventor： Kenta KIRIHARA ,  Eisuke KURODA ,  Nao SAITO ,  Hiroo HORII ,  Masahiro YATSU

IPC: G06Q50/06 ,  G06N5/04 ,  G06N20/00 ,  H02J3/24

Abstract: In order to provide a power grid decision-making support device and method which are capable of providing operator decision-making support, and quickly presenting control candidates, and a system which applies the same, one representative embodiment of the present invention provides a power grid decision-making support device characterized by comprising: a control candidate learning unit for deriving, by learning, a plurality of control candidate models for stabilizing a power grid; a control candidate extraction unit for extracting, from the plurality of control candidate models derived by the control candidate learning unit, control candidates using power grid measurement data and extraction parameters; a control candidate evaluation unit for evaluating the control candidates using a power grid model and the control candidates; and an information presentation unit for presenting information about the evaluation results and the control candidates.