Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Nippon Shokubai Co., Ltd.

Funai Electric Company Ltd.

Kenichi Watanabe

Hideaki Tsuneki

Yoshiyuki Onda

Hoday Stearns

Hiroshi Yoshida

Takahiro Kudoh

Masaru Kirishiki

Mitsuru Kaji

Atusi Moriya

Junji Kondoh

Hiroki Wakayama

Yutaka Yamamoto

Seiya Miyazaki

Wei Zhang

Masaaki Nagahara

Masakazu Nomura

Gou Nishida

Tadashi Yanagisawa

Takanobu Fujimoto

Tetsuya Nakajima

Atsushi Takeuchi

Hiroshi Arashima

Tohru Harada

A received power control device () that performs control of received energy, which is an amount of power received from a power system per predetermined time at a power receiving point to which a load () and an electric storage device () are electrically connected, the received power control device () performing the control by controlling charge and discharge of at least the electric storage device (), including: a received energy obtainer () that periodically obtains information indicating the received energy; a controller () that causes at least the electric storage device () to discharge to prevent the received energy from exceeding a first threshold; a remaining capacity obtainer () that periodically obtains information indicating a remaining capacity of the electric storage device (); and a threshold setter () that increases the first threshold when an amount of decrease in the remaining capacity per unit time exceeds a second threshold.

Received power control device and received power control method

A frequency control method for use in a frequency control system including: a server that receives, from a power system operator, a power command for controlling a frequency of a power grid within a predetermined frequency; at least one distributed energy resource; and a local controller connected to the server through a communication network and to the at least one distributed energy resource, the frequency control method includes: receiving the power command from the power system operator; obtaining a frequency measurement of the power grid; predicting a next power command using the frequency measurement, before the next power command is received from the power system operator; and controlling an input or output of the at least one distributed power energy resource using the predicted next power command, before the next power command is received from the power system operator.

Frequency control method and frequency control system

A power system stabilization method includes: receiving a power command value from a power control center that monitors a power system; transmitting the power command value to a power supply device; causing the power supply device to supply power to the power system according to the power command value; generating a prediction command value according to past power command values received from the power control center, the prediction command value being a prediction value of a power command value to be transmitted from the power control center next after the power command value; transmitting the prediction command value to a power supply device; causing the power supply device to supply power to the power system according to the power prediction command value; receiving the next power command value from the power control center; transmitting the next power command value to the power supply device.

Method and system for power system stabilization using prediction confidence based on high-frequency components of power command value

A voltage control apparatus includes: a voltage value obtainment unit configured to obtain voltage values at the one or more voltage measuring points; an impedance obtainment unit configured to obtain a system impedance from a distribution substation to each of power adjustment apparatuses; a control variable calculating unit configured to calculate a control variable including at least one of (i) a value corresponding to an allowable upper limit of a voltage value at the first voltage measuring point and (ii) a value corresponding to an allowable lower limit of the voltage value at the first voltage measuring point, based on the voltage values at the one or more voltage measuring points and the system impedances; and a notification unit configured to notify the power adjustment apparatuses of the calculated control variable.

Voltage control apparatus, voltage control method, and power adjustment apparatus

Provided is a frequency regulation method for regulating a frequency of a power system so that the frequency approximates to a rated frequency, the method including: measuring the frequency; obtaining an SOC (state of charge) of a storage battery; determining a base-point of power to be charged in or discharged from the storage battery when the measured frequency is equal to a predetermined rated frequency; determining a control variable changed from the base-point by an amount corresponding to a frequency deviation that is a difference between the predetermined rated frequency and the measured frequency; and charging or discharging the storage battery based on the control variable, wherein in the determining a base-point, a third rate of change is smaller than a first rate of change and a second rate of change that are average rates of change in the base-point with respect to the SOC when the SOC is within a first range and a second range, respectively.

Frequency regulation method, frequency regulation apparatus, and storage battery system

A power control apparatus includes: a first obtainment unit which obtains a power flow value at a power flow measuring point and a voltage value at a voltage measuring point provided; a power flow control unit which calculates a first power change value, to cause the power flow value to approach a predetermined target value; a voltage control unit calculates a voltage value at the voltage measuring point when the first power has been changed by the first power change value, and sets a second power change value, based on whether or not the voltage value falls within a predetermined voltage range; and a notification unit which notifies the power adjustment apparatus of a command value for causing the power adjustment apparatus to input or output the first power changed by the first power change value and the second power changed by the second power change value.

Power control apparatus, power control method, and power control program

A frequency control method includes segmenting a range from a predetermined reference frequency to a predetermined lower limit frequency or a predetermined upper limit frequency into frequency range segments according to a number of battery apparatuses, detecting a current frequency of a power system, and causing battery apparatuses to charge from the power system or discharge to the power system in order to control a frequency or maintain a supply and demand balance of the power system, causing lager number of battery apparatuses to charge or discharge as a frequency range segment including the current frequency becomes farther apart from the reference frequency.

Frequency control method and frequency control apparatus

A method of controlling frequency of a power system by a frequency control system includes: obtaining a frequency control command to keep frequency fluctuation of the power system within a predetermined range; obtaining information on electric power to be received or supplied by m second apparatuses, and determining n first command values for controlling electric power to be received or supplied by n first apparatuses, based on the frequency control command obtained in the obtaining of a frequency control command and the obtained information on electric power to be received or supplied by the m second apparatuses; and transmitting each of the n first command values determined in the determining to a corresponding one of the first apparatuses.

Method of controlling frequency, frequency control system, frequency control apparatus, and program

A voltage control apparatus includes: an obtaining unit which obtains voltage values at voltage measuring points; a detecting unit which detects a system impedance value; a control quantity calculating unit which calculates, as control quantity, a reactive power value to be output by a power regulating apparatus to prevent at least a voltage value deviating from a predetermined voltage range from deviating from a target voltage value; and a notifying unit which notifies the power regulating apparatus of the control quantity. The control quantity calculating unit calculates the control quantity such that the voltage value at a specific voltage measuring point is substantially equal to the target voltage value, and when all of the voltage values deviating from the target voltage value deviate from the target voltage value in a same direction, only positive or negative reactive power is output by power regulating apparatuses.

Voltage control apparatus, voltage control method, and power regulating apparatus

The voltage control apparatus () includes: a first information obtaining unit () obtaining an output value of active power output from each of the distributed generations, and a voltage deviation amount or a voltage value at a point of common coupling of each of the distributed generations; and a control variable calculating unit () calculating a control variable corresponding to an amount of the active power or reactive power that should be changed and is to be output from each of the distributed generations to the distribution system so that the voltage deviation amount or the voltage value at one of the points of common coupling falls within a predetermined proper range in advance, wherein the control variable calculating unit calculates the control variable to be larger, as the output value of the active power output from one of the distributed generations is larger.

Voltage control apparatus, method, and program

The optical disk apparatus is provided with a radiation shielding potion including a horizontal section in parallel to a bottom plate , and vertical sections which extend downwardly from both ends of the horizontal section, and provided in the vicinity of a front panel to cross over a disk read section equipped with a pickup . Further, each of the horizontal section and the vertical sections is first shielding planes in parallel to the front panel and second shielding planes perpendicular to the front panel. The vertical sections are secured to the bottom plate at their lower ends.

Optical disk apparatus

A disc playback device reproduces either a video disc or an audio disc which is loaded and includes a digest playback device for reproducing each track of the video disc for a predetermined time and a scan playback device for reproducing each track on the audio disc for a predetermined time. A special playback instructing device instructs the disc playback device to reproduce each track of the disc which is loaded, for a predetermined time, and a disc type judging device is used for judging the type of disc to be reproduced. A special playback control device operates such that when the special playback instructing device issues an instruction to play back, if the result of judgment by the disc type judging device shows a video disc, the special playback control device drives the digest playback device, and if the result of judgment by the disc type judging device shows an audio disc, the special playback control device drives the scan playback device.

Disk playback device for performing special playback mode established by single special playback key, and media storing playback control program for same

Reaction distillation apparatus and reaction distillation method

Process for preparing aromatic carbonic ester

A catalyst for producing an aryl ester of a carbonic or carboxylic acid is disclosed, which includes a microporous material containing a metal element belonging to group IV. This catalyst can be used as a heterogeneous catalyst to produce the aryl ester in high yield with industrial advantages. In order to produce the aryl ester using the catalyst, a carbonate or an aliphatic carboxylate is transesterified with an aromatic hydroxy compound, or an aryl carboxylate is transesterified with a carbonate, or an alkyl aryl carbonate is disproportionated by transesterification.

Growing community of inventors

Osaka, Japan

Kenichi Watanabe