Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Yoshio Ebata

Hideki Hayashi

Yasuhiro Noro

Toshiaki Asano

Kazuya Omata

Misao Kimura

Mami Mizutani

Takenori Kobayashi

Masako Kiuchi

Tsutomu Tanno

Yoko Kosaka

Midori Otsuki

A voltage reactive power control device includes a bus voltage fluctuation extracting unit that extracts a bus voltage fluctuation from a voltage of a secondary-side bus, an RE component extracting unit that extracts a fluctuation component due to renewable energy power generation from the bus voltage fluctuation, a creating unit that creates a reactive power command value for suppressing the fluctuation component based on the bus voltage fluctuation component due to the renewable energy power generation extracted by the RE component extracting unit, and a control unit that executes the reactive power control on a battery system based on the reactive power command value. The RE component extracting unit extracts the fluctuation component due to the renewable energy power generation by eliminating the fluctuation components other than the fluctuation component due to the renewable energy power generation from the bus voltage fluctuation.

Voltage reactive power control device and voltage reactive power control method

According to one embodiment, a system includes a battery to charge power and discharge a direct-current power to a converter, the converter supplying the converted power to a power system, detectors detecting a voltage at a point between the converter and power system, a current output from the converter and effective power from the voltage value and a current value detected, units computing an angular frequency of the voltage output from the converter, based on an effective power value and an output target value of effective power and an output voltage target value of the converter, based on a current value, a set voltage value and an angular frequency, and a controller controlling the converter according to the output voltage target value.

Photovoltaic generation system and power feeding system

According to one embodiment, a system includes modules to detect a node voltage and an output current of a converter, a detector to obtain an effective power value, a system condition detector to detect a power supply condition in the electric system or the operating conditions of devices included in the electric system and then output a first signal, a setting unit to switch a set value to a preset first or second value and then output the set value, a unit to calculate an angular frequency of an output voltage of the converter on the basis of an output of the detector, the value, and an output of the system condition detector, and a unit to calculate a target value of the converter.

Photovoltaic system and power supply system

According to one embodiment, the photovoltaic system includes a memory configured to store power generator characteristics to be applied to the photovoltaic system, a calculation section configured to calculate an output target value to be output by the photovoltaic system using the power generator characteristics read from the memory, an operation target value, system data of a power system, and output data from the photovoltaic system to the power system, and a photovoltaic section configured to supply a corresponding power to the power system based on the output target value calculated by the calculation section.

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Fuchu, Japan

Yoshio Ebata