Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Toshiba Infrastructure Systems & Solutions Corporation

Toshiba Corporation

Yasuhiko Miguchi

Mami Mizutani

Masahiro Tohara

Takenori Kobayashi

Yukitaka Monden

Tsutomu Tanno

Masako Kiuchi

Shinichiro Kosugi

Ryuichi Morikawa

Shunsuke Kawachi

Kazuto Kuroda

Masayuki Kubota

Takashi Morimoto

Norio Takami

Yasuhiro Harada

Hajime Yamamoto

Shigeru Tanaka

Hiroshi Uchino

Tatsuya Hashimoto

Yuki Kuwano

Akihiro Matsui

Shuji Ono

Hiroshi Mochikawa

Nobuo Shibuya

Takahisa Wada

Kazuto Kubota

Yuji Okita

Yoshito Sameda

Kenji Mitsumoto

Shinya Naoi

Takafumi Nakahama

Morio Suzuki

Nobumitsu Tada

Takashi Akiba

Tamotsu Endo

Yushi Koyama

Makoto Ide

Tomohiro Toyosaki

Takeo Hayase

Masaaki Shigeta

Hisashi Oya

Yasuyuki Ito

Fumiyuki Yamane

Koji Maki

Yoko Kosaka

Toshimasa Yamada

Yasuhiro Ogura

Norihito Togashi

Tadashi Shudo

Nagaaki Muro

Kenichi Wakasugi

Yoshio Ebata

Tamon Ozaki

Yasuhiro Miyamoto

Taihei Koyama

Yosuke Tonami

Kenya Kurokawa

Shunsuke Tamada

Yuusuke Yamashita

Satoru Amaki

Midori Otsuki

Hironobu Aoki

Takehiro Usumori

Takuro Arai

Susumu Nishida

Yuuki Kuwano

Takeo Kakuchi

Yuusaku Hata

Kazuyoshi Shimada

Noriyuki Yamagishi

Toshiyuki Seto

Ken Yabui

Takafumi Domoto

Yasuji Sakata

According to an embodiment, a storage battery management device includes: a memory configured to store therein storage battery characteristics of a storage battery unit as a storage battery characteristics table; and one or more processors coupled to the memory. The one or more processors are configured to: acquire the storage battery characteristics based on storage battery information output from the storage battery unit; update the storage battery characteristics table based on the acquired storage battery characteristics; and estimate SOC of the storage battery unit by referring to the updated storage battery characteristics table.

Storage battery management device and method

A battery capacity estimation device in an embodiment includes one or more hardware processors configured to: acquire an alternating current power or an alternating current energy that is input to and output from a storage battery system via a direct current-alternating current converter, the storage battery system being capable of controlling charge and discharge; acquire a state of charge (SoC) of the storage battery system; and estimate a battery capacity of the storage battery system based on the acquired alternating current power or the acquired alternating current energy and the acquired SoC.

Battery capacity estimation device, battery capacity estimation method, and computer program product

A remaining battery energy estimation device according to an embodiment includes a current corrector, an SOC calculator, a voltage estimator, an SOC correction amount determiner, and a current error estimator. The current corrector determines a corrected current value on the basis of a current value and a current correction amount of a storage battery. The SOC calculator calculates an estimated SOC value of the storage battery on the basis of the corrected current value and an SOC correction amount. The voltage estimator determines an estimated voltage value of the storage battery on the basis of a temperature value of the storage battery, the corrected current value, and the estimated SOC value. The SOC correction amount determiner determines the SOC correction amount on the basis of a comparison between a voltage value of the storage battery and the estimated voltage value. The current error estimator determines the current correction amount on the basis of the SOC correction amount.

Remaining battery energy estimation device, remaining battery energy estimation method, and storage medium

A power supply system includes a plurality of power conversion devices, a plurality of breakers, and a controller. The plurality of breakers are respectively connected to the plurality of power conversion devices and configured to perform switching of an electrical connection between the power conversion device and a power system, wherein the breaker switches an ON state and an OFF state. The controller is configured to control the breakers and switch connection states of the plurality of power conversion devices are switched, and the controller being configured to determine whether or not the connected breaker is in an ON state and electrically conducted to the power system and the number of the power conversion devices in a standby state reaches a predetermined number.

Power supply system and control device

A battery capacity estimation apparatus includes one or more hardware processors that: calculate a current integrated value by integrating electric currents of a secondary battery system whose capacity is to be estimated; calculate an SOC estimate value in a stabilization state where a change in SOC of a secondary battery per unit time is comparatively small; perform a regression analysis in which the current integrated value is defined as a dependent variable and the SOC estimate value is defined as an independent variable, the regression analysis being performed while correcting the current integrated value based on a value of a coefficient of determination so that a result of the regression analysis has predetermined accuracy; and estimate a capacity of the secondary battery system based on the result of the regression analysis.

Electric storage capacity estimation apparatus and method for operating the same

According to an embodiment, there is provided an apparatus which can hold down an energy loss and can avoid an increase in size. The apparatus includes a cell including a floating capacitor connected in parallel to an upper-side switching element and a lower-side switching element; an upper arm include including first switch circuits, each including a first switching element, a first diode and a first capacitor, are connected in series; a lower arm including second switch circuits, each including a second switching element, a second diode and a second capacitor, are connected in series; and a circuit which connects a low-side terminal of the cell and a low-side terminal of the first capacitor and connects a high-side terminal of the cell and a high-side terminal of the second capacitor.

Power conversion apparatus

A reactive power control device includes a limit value deriver configured to derive a limit value of reactive power, which is output by one or a plurality of power conversion devices determined for system stabilization and control of a system voltage, on the basis of a voltage of a point other than a voltage control target, and a command value adjuster configured to adjust a reactive power command value for the one or plurality of power conversion devices on the basis of the limit value derived by the limit value deriver.

Reactive power control device and reactive power control method

A system interconnecting facility is connected to a power system, and includes a plurality of power converters connected to the power system, a plurality of transformers provided between the power system and the power converters, a plurality of switches provided between the transformers and the power converters, and a controller that controls the opening and closing of the switch. The controller outputs, to the switches, open and close commands in so that the number of closed switches is out of a closed switch number range where a harmonic voltage of the system interconnecting facility increases, based on a harmonic voltage containing rate characteristic that is a relation between the number of closed switches and a harmonic voltage containing rate of the system interconnecting facility. The system interconnecting facility is capable of suppressing a harmonic voltage even if a circuit structure differs depending on a situation.

System interconnecting facility

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

A method of estimating, as the charging rate of an electricity storage system, the internal condition of the electricity storage system including plural batteries, and an internal condition estimating system utilizing that method are provided. A voltage measuring unitmeasures voltages of all batteriesconfiguring an electricity storage system block. A system cell voltage determining unitdetermines a system cell voltage that will be a reference for an estimation of the SOC value of the electricity storage system blockbased on the voltage value of the plural batteriesmeasured by the voltage measuring unit. The system cell voltage determining unitobtains the system cell voltage by giving a weighting to the voltage value in accordance with the pre-calculated SOC value of the electricity storage system block. The system SOC estimating unitestimates the SOC value of the electricity storage system blockbased on the current flowing through the batteryand the system cell voltage.

Internal condition estimating system and estimating method

An electricity storage system includes a plurality of chargeable and dischargeable battery boards, a plurality of PCSs connected to the respective battery boards, and charging and discharging the connected batteries, and a battery controller distributing a charging and discharging power value of the entire system as an instruction value to each of the PCSs at a constant cycle or at an arbitrary timing. The battery controller gives a charging and discharging instruction for a predefined test charging and discharging to the selected battery board, and distributes, to all the battery boards except the selected battery board, a value obtained by subtracting a charging and discharging power value for the test charging and discharging from a charging and discharging power value for the entire system.

Electricity storage system and method of estimating characteristic parameter

A secondary battery system and a method of arranging battery modules capable of recovering and maintaining the system performance are provided. A secondary battery system includes a battery cabinet group including a plurality of battery cabinets each comprising a plurality of battery modules connected to each other, the battery module being a replacement unit, a PCS connected to the battery cabinet group and is controlling charging and discharging thereof, and a battery controller connected to the PCS. The battery controller includes a deterioration inspecting block obtaining a characteristic of the battery modules, a numbering block numbering the battery modules in an ascending order based on the characteristics, and a re-arrangement determining block determining a re-arrangement position of the battery modules in a way that the numbers given by the numbering block are in sequence in the same battery cabinet.

Secondary battery system and method of arranging battery module

According to one embodiment, a storage battery management device includes a chargeable/dischargeable capacity table, a controller, and a communication controller. The chargeable/dischargeable capacity table stores therein in advance a chargeable/dischargeable capacity corresponding to a temperature, a state of charge (SOC), a required charge rate or discharge rate, and a battery degradation rate of a secondary battery. The controller calculates an actual chargeable/dischargeable capacity by referring to the chargeable/dischargeable capacity table based on the temperature, the SOC, the required charge rate or discharge rate, and the battery degradation rate of the secondary battery. The communication controller informs a host device about the chargeable/dischargeable capacity of the secondary battery.

Storage battery management device, method, and computer program product

A control device of a power storage apparatus according to an embodiment includes a wind speed acquiring device, a power generation output detector, a capacity detector, and a controller. The wind speed acquiring device acquires a wind speed. The power generation output detector detects a power generation output of a wind power generation apparatus connected to a power system. The capacity detector detects a remaining capacity of the power storage apparatus that stores at least a portion of a power in the power generation output and supplies at least a portion of the stored power to the power system. The controller controls storage and supply of the power to suppress a variation in a combined output obtained by combining the power generation output and the power stored or supplied by the power storage apparatus, based on the wind speed, the power generation output, and the remaining capacity.

Control device of power storage apparatus, wind power generation system, and control method of power storage apparatus

A secondary battery system including plural batteries, extends the lifetime of each battery, and improves the charge/discharge (energy) efficiency of a whole system is provided. A secondary battery system includes plural batteries individually controllable for charging/discharging, plural PCSs each connected to the corresponding battery and performing charging/discharging to the connected battery, and a battery controller distributing a charge/discharge power value as a whole system to each of the PCSs at a fixed cycle or an arbitrary timing. The battery controller includes a preference order calculator setting a preference order to the plural batteries at each time point based on a deterioration characteristic of each battery related to each SOC thereof, and a distribution rate determining unit distributing the charge/discharge power value to the PCSs in accordance with the preference order.

Secondary battery system with plural batteries and method of distributing charge/discharge power

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Hachioji, Japan

Mami Mizutani