Kawasaki Jukogyo Kabushiki Kaisha

Yuji Shindo

Kenichi Sakimoto

Kazushige Sugimoto

Osamu Noro

Yuko Hirase

Shogo Katsura

Eiji Yoshimura

Hidehiko Nakagawa

A power conversion device includes: a power converter to perform output to an output line connected to a single-phase power system; and a control device to control the power converter so it operates as a virtual synchronous generator. The control device includes: a voltage and current measurer to obtain, from a single-phase system voltage, an angular velocity and a phase of the system voltage by an estimation operation that uses the phase of the system voltage as a parameter; a power obtainer to obtain active power and reactive power; a governor model to calculate a phase difference; an AVR model to calculate an absolute value of an induced voltage of a virtual synchronous generator; a generator model to calculate current command values corresponding to an armature current of the virtual synchronous generator; and a current controller to generate and output a PWM signal to the power converter.

Power conversion device connected to single-phase system

A power converter that includes: a power conversion unit; and a control unit configured to control the power conversion unit such that the power conversion unit operates as a virtual synchronous generator. The control unit includes: an AVR model unit; a governor and driving source model unit; a power generation torque arithmetic operation unit; a rotation angle arithmetic operation unit; a voltage d-q conversion unit; and a generator model unit configured to perform arithmetic operation.

Grid-interconnected power converter

Growing community of inventors

Akashi, Japan

Yuji Shindo