Abstract: A power system includes: power converters configured to acquire an electrical characteristic value of input power or power to output, control a power conversion characteristic of an output of power based on a reference function in which an electrical characteristic value of an output of power is defined according to an input value by using the acquired electrical characteristic value as an input value, and update a stored reference function to the acquired reference function; a controller configured to set a reference function and output the set reference function to the power converters; and a DC electric line to which the plurality of power converters is connected. The controller is configured to calculate a voltage drop in the electric line from a power target value of an output and a line impedance of the electric line, and set the reference function based on the calculated voltage drop.

Abstract: A power system includes: power converters configured to acquire an electrical characteristic value of input power or power to output, control a power conversion characteristic of an output of power based on a reference function in which an electrical characteristic value of an output of power is defined according to an input value by using the acquired electrical characteristic value as an input value, and update a stored reference function to the acquired reference function; a controller configured to set a reference function and output the set reference function to the power converters; and a DC electric line to which the plurality of power converters is connected. The controller is configured to calculate a voltage drop in the electric line from a power target value of an output and a line impedance of the electric line, and set the reference function based on the calculated voltage drop.

Abstract: A recording apparatus includes a setting unit for providing a setting for collecting a product, in advance, when a plurality of images is to be recorded consecutively onto a sheet, for a first job and a second job following the first job, the product including a first image recorded on the sheet for the first job. When the setting is made by the setting unit, and a feeding portion and a winding portion are caused to execute a rewinding operation for conveying the sheet in a reverse conveying direction, the control portion executes a first operation of starting recording a second image for the second job following the first job, on a second area following a first area of the sheet, the first area being an area where the first image is recorded, and stopping recording the second image halfway through.

Abstract: An electric power converter includes: an electric power conversion unit configured to convert electric power that has been input, and output the converted electric power; and a control unit configured to control, based on a reference function, an electric power conversion characteristic of the electric power conversion unit, wherein the reference function includes plural droop functions that have been defined according to input values, have drooping characteristics different from one another, and have been connected to each other, and the control unit is configured to control the electric power conversion characteristic by control schemes that are different from one another and are according to the drooping characteristics of the droop functions.

Abstract: A power system includes: power converters configured to acquire an electrical characteristic value of input power or power to output, control a power conversion characteristic of an output of power based on a reference function in which an electrical characteristic value of an output of power is defined according to an input value by using the acquired electrical characteristic value as an input value, and update a stored reference function to the acquired reference function; a controller configured to set a reference function and output the set reference function to the power converters; and a DC electric line to which the plurality of power converters is connected. The controller is configured to calculate a voltage drop in the electric line from a power target value of an output and a line impedance of the electric line, and set the reference function based on the calculated voltage drop.

Abstract: A power control device for controlling a power converter configured to convert an input power to output includes: a setting unit configured to set a control mode of the power converter to either one of a constant voltage control, a constant current control, a constant power control, and an output stop according to an input value, and set a target value of output of the power converter corresponding to the control mode based on the control mode and a reference function defined according to an input value; and an output unit configured to output the control mode set by the setting unit and the target value set by the setting unit to the power converter.

Abstract: A power system includes: power converters, each including a power conversion unit configured to convert an input power, and output the converted power, a controller configured to execute a primary control for controlling the output by controlling the power conversion unit based on: a reference function having a drooping characteristic defined according to an input value and a voltage of the bus or a power of the power converter to which the power conversion unit is connected, and an update unit configured to update a control method on the output; a central control device configured to execute a secondary control of controlling the power converter; the bus connected to the power conversion unit; and a power element connected to the power converter and configured to supply, consume and charge power. The central control device performs the secondary control on the power converter according to an update instruction to update the control method.

Abstract: A power converter includes: an input unit configured to be electrically connected to a device; a voltage charge unit configured to change voltage; a voltage adjustment unit configured to adjust the voltage supplied to a transmission line; a target setting unit configured to set a first target value of the voltage change unit; a voltage monitoring unit configured to observe the voltage of the transmission line; and a threshold determination mechanism configured to calculate a second target value of the voltage adjustment unit in accordance with voltage of the transmission line. The target setting unit of the power converter is configured to generate the first target value as an output target of the voltage charge unit in accordance with the voltage observed by the voltage monitoring unit. The first target value has characteristics to change a threshold voltage for controlling output of the voltage adjustment unit depending on time.

Abstract: An electric power converter includes: a direct current electric power conversion unit connected to a direct current bus and configured to convert input electric power and output the converted electric power; a measurement unit configured to obtain a measured value of an electric characteristic value of the input electric power or the output electric power; a communication unit configured to perform communication with an external device and receive a reference function having a characteristic with a defined target value for an electric characteristic value according to an input value; a storage unit configured to store a standard reference function having a predetermined characteristic; and a control unit configured to control an electric power conversion characteristic of the electric power conversion unit based on a target value determined according to an input value, by voltage control corresponding to the characteristic, or by electric power control or electric current control.

Abstract: A power converter includes: a power converting unit configured to convert input power and output the converted power; and a control unit configured to control a power conversion characteristic of the power converting unit based on a reference function having a droop characteristic that is defined according to an input value, according to the input value in any one of voltage control, power control, and current control corresponding to the droop characteristic. The reference function is constituted of a plurality of droop functions having droop characteristics different from one another connected at a connection point. A control area to define a range of voltage, power, and current in which corresponding voltage control, power control, or current control is performed is acquired for each of the droop functions.

Abstract: A power system includes: power converters, each including a power conversion unit configured to convert an input power, and output the converted power, a controller configured to execute a primary control for controlling the output by controlling the power conversion unit based on: a reference function having a drooping characteristic defined according to an input value and a voltage of the bus or a power of the power converter to which the power conversion unit is connected, and an update unit configured to update a control method on the output; a central control device configured to execute a secondary control of controlling the power converter; the bus connected to the power conversion unit; and a power element connected to the power converter and configured to supply, consume and charge power. The central control device performs the secondary control on the power converter according to an update instruction to update the control method.

Abstract: An electric power converter includes: an electric power conversion unit configured to convert electric power that has been input, and output the converted electric power; and a control unit configured to control, based on a reference function, an electric power conversion characteristic of the electric power conversion unit, wherein the reference function includes plural droop functions that have been defined according to input values, have drooping characteristics different from one another, and have been connected to each other, and the control unit is configured to control the electric power conversion characteristic by control schemes that are different from one another and are according to the drooping characteristics of the droop functions.

Abstract: A power converter includes: an input unit configured to be electrically connected to a device; a voltage charge unit configured to change voltage; a voltage adjustment unit configured to adjust the voltage supplied to a transmission line; a target setting unit configured to set a first target value of the voltage change unit; a voltage monitoring unit configured to observe the voltage of the transmission line; and a threshold determination mechanism configured to calculate a second target value of the voltage adjustment unit in accordance with voltage of the transmission line. The target setting unit of the power converter is configured to generate the first target value as an output target of the voltage charge unit in accordance with the voltage observed by the voltage monitoring unit. The first target value has characteristics to change a threshold voltage for controlling output of the voltage adjustment unit depending on time.

Abstract: An electric power converter is electrically connected to an electric storage device. The electric power converter is configured to refer to, according to voltage measured by the electric power converter, a reference function as output target for the electric storage device, the reference function having drooping characteristic and representing a control target function. The reference function has a constant-input-output region over a predetermined voltage range. The reference function is updated based on battery status of the electric storage device.

Abstract: An electric power converter for being electrically connected to a commercial power system of alternating current type and electrically connected to a device configured to input and/or output electric power. The converter includes a control unit configured to perform primary control of the device based on a reference function which has drooping characteristic for generating target value when local-control of the device is implemented according to voltage measured by the electric power converter. The electric power converter is further controlled according to secondary control in which the reference function having the drooping characteristic is updated according to electric power status of an electric power system in which the electric power converter is installed, and control cycle of the primary control is different from control cycle of the secondary control.