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公开(公告)号：US20240275165A1
公开(公告)日：2024-08-15
申请号：US18564740
申请日：2021-06-23
发明人： Toshiyuki FUJII , Kaho MUKUNOKI , Hiroki ISHIHARA , Ryosuke UDA , Kota HAMANAKA
CPC分类号： H02J3/00 , H02H3/08 , H02J2203/20
摘要： A control device includes a generator simulating unit to generate a phase of output voltage of a power converter by simulating characteristics of a synchronous generator, a first voltage command generating unit to generate a first voltage command value of output voltage of the power converter so that an AC voltage of a power grid attains a target voltage, a setting unit to set an overcurrent level, and a second command generating unit to generate a second voltage command value by limiting the first voltage command value based on the overcurrent level. The control device further includes a signal generating unit to generate a control signal for the power converter, based on the phase generated by the generator simulating unit and the second voltage command value.
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公开(公告)号：US20240297597A1
公开(公告)日：2024-09-05
申请号：US18697911
申请日：2021-10-07
发明人： Kaho MUKUNOKI , Toshiyuki FUJII , Ryosuke UDA , Kota HAMANAKA , Shuhei FUJIWARA
IPC分类号： H02M7/5387
CPC分类号： H02M7/53871
摘要： A current suppression control unit calculates correction terms of reference voltage command values for operating a power converter as a voltage source. The correction terms are calculated to compensate for respective current deviations of output currents transformed on two axes, with respect to current command values on a two-axis rotating coordinate system for suppressing an output current of the power converter to less than or equal to a control upper limit value. A proportional control unit has proportional elements to reflect the current deviations in the correction terms within the same axes of the two axes. A decoupling control unit has integral elements to reflect the current deviations in the correction terms between the different two axes.
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公开(公告)号：US20240275301A1
公开(公告)日：2024-08-15
申请号：US18567806
申请日：2021-06-24
发明人： Toshiyuki FUJII , Kaho MUKUNOKI , Hiroki ISHIHARA , Ryosuke UDA , Kota HAMANAKA
摘要： A power conversion device includes a power converter and a control device. The power converter converts a DC power output from a power storage element into an AC power. The control device includes a phase synchronizing unit to estimate a reference phase of an output voltage of the power converter synchronized with a phase of an AC voltage at an interconnection point, a characteristics simulating unit to generate an active power command value based on a phase difference between a reference phase and the phase of the AC voltage at the interconnection point, a DC voltage command generating unit to generate a DC voltage command value, a voltage command generating unit to generate an AC voltage command value so that an output current of the power converter becomes less than a threshold, and a signal generating unit to generate a control signal based on the AC voltage command value.
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