Abstract:
According to one embodiment, a power supply device connected to a power grid is provided. The power supply device includes an inverter, a control unit configured to control operation of the inverter using a first parameter value so as to simulate characteristics of a synchronous generator, and an acquisition unit configured to obtain a second parameter value different from the first parameter value. The control unit is configured to control the operation of the inverter by changing the first parameter value to the acquired second parameter value.
Abstract:
A power conditioning system includes a control circuit. The control circuit is configured to switch a output control mode to any one of a first mode in which an operation not based on inertia is executed and a second mode in which an operation based on inertia is executed, performs output control according to a first rating in the first mode, and performs output control according to a second rating different from the first rating in the second mode.
Abstract:
In one embodiment, a coil includes a magnetic core and a winding. The magnetic core includes at least one block provided with a groove or an opening. Each block is arranged so as to make the groove or the opening extend along a direction of magnetic flux. The coil is used as a power transmitting coil or a power receiving coil.
Abstract:
An inverter of an embodiment includes a power convertor that can perform at least one of a first action of generating electricity to be output to a power system based on a pseudo inertia and a second action of generating electricity to be output to the power system without based on the pseudo inertia, and a transmitter that transmits, to a high-order control system, first information indicating which of the first action and the second action the power converter is performing.
Abstract:
According to one embodiment, a detection apparatus includes a pair of conductors configured to detect an electromagnetic wave occurring due to a discharge phenomenon in a target apparatus, wherein the pair of conductors are arranged in a near field region of the target apparatus in which the electromagnetic wave occurs.
Abstract:
A power transmission apparatus includes a power transmission pad, a base structure, and grout. The power transmission pad for wireless power transmission has a cast resin frame, at least part of the cast resin frame being embedded in the ground. The base structure is disposed below the power transmission pad. The grout is filled around the power transmission pad, including a gap between an upper surface of the base structure and the power transmission pad.
Abstract:
A transformer between waveguide and transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes a first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (λg/2) from each other. One of the feed pins has a second distance of approximately (λg*(1+2α)/4) from the third metal plane. “λg” is a wavelength in the waveguide and “α” is an integer which is equal or larger than “0”. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. “a” is length of the waveguide along the third metal wall.
Abstract:
A bypass circuit of an embodiment includes a switch that shorts-circuit between a first power conversion apparatus and a power storage apparatus. The switch is connected in parallel to a second power conversion apparatus. The first power conversion apparatus converts power generated from natural energy and outputs the converted power to a power distribution grid. The second power conversion apparatus converts surplus power that has not been converted by the first power conversion apparatus and charges the power storage apparatus with the converted power; or converts power discharged from the power storage apparatus and supplies the converted power to the first power conversion apparatus.
Abstract:
According to one embodiment, a detection apparatus includes a pair of conductors configured to detect an electromagnetic wave occurring due to a discharge phenomenon in a target apparatus, wherein the pair of conductors are arranged in a near field region of the target apparatus in which the electromagnetic wave occurs.
Abstract:
According to one embodiment, a voltage control inverter interconnectable with an electric power system, includes: a voltage detecting circuit configured to detect a first voltage that is a voltage of the electric power system; and a voltage output circuit configured to output a second voltage to the electric power system at a timing depending on a value of the first voltage, the second voltage having a value depending on the value of the first voltage.