Omron Corporation

Osamu Uchida

Makoto Ohashi

Yoshihiko Yamaguchi

Takashi Kitamura

Akihiro Takeshima

A power line interface is electrically connectable to a direct-current power system including a power line. A bidirectional DC-DC converter is electrically connected to the power line interface and a battery. A controller receives a first current value measured by a first current sensor and a current command value and performs constant current control processing that controls the bidirectional DC-DC converter so that the first current value equals the current command value. The controller receives a first voltage value measured by a voltage sensor and a voltage command value and performs constant voltage control processing that controls the bidirectional DC-DC converter so that the first voltage value equals the voltage command value. The controller switches operation from the constant current control processing to the constant voltage control processing.

Power storage control apparatus, direct-current power system, and controlling method thereof

A rechargeable battery controller is combined with a rechargeable battery and used in an existing PV system. The controller includes a DC-DC converter, which allows power to be passed between a power line and a rechargeable battery, and a control unit, which determines whether maximum power point tracking (MPPT) control using hill climbing is being performed by a PCS based on an input voltage or current value of the PCS. The control unit regulates charge/discharge power of the rechargeable battery to allow input power of the PCS to be a target value based on the input voltage and current values of the PCS while MPPT control using hill climbing is performed, and maintains, in a period during which MPPT control using hill climbing is not performed, the charge/discharge power to be the power at a beginning of the period.

Growing community of inventors

Kusatsu, Japan

Osamu Uchida