摘要:
An abnormality occurring in a ZCT is detected simply and reliably. A zero-phase-sequence current transformer (ZCT) (11) detects zero-phase-sequence current in power wires inserted therethrough, and in addition to the power wires, has inserted therethrough a wire through which a constant DC offset current flows.
摘要:
This system can manage efficient operation control among distributed power sources without impairing their versatility. This power control system includes distributed power sources including a storage cell (12) and a power generation device (33) that generates power while a current sensor (40) detects forward power flow, and a power control device (20) including a first power converter (21) that converts AC power from a commercial power grid to DC power and supplies the DC power to the storage cell (12) during an interconnected operation, a supply unit that supplies power generated by the power generation device (33) to the storage cell (12) during an independent operation, and an independent operation switch (24) opened during the interconnected operation and closed during the independent operation to cause output from the first power converter (21) to flow in a forward power flow direction through the current sensor (40).
摘要:
An input apparatus 10 includes an input unit 11, a display unit 12, an input mode determination unit 13 for determining whether an input is in a first input mode or a second input mode and an input control unit for controlling, when the input to a key is determined as the first input mode, so that a plurality of characters assigned to the key are changed and displayed in sequence as input character candidates in response to the input, and when the input to the is determined as the second input mode, for searching characters corresponding to the characters assigned to the key among the inputted character strings as correction character candidates and controlling, to the searched correction character candidates, movement of the cursor displayed on the display unit 12 in response to the input.
摘要:
This system can manage efficient operation control among distributed power sources without impairing their versatility. This power control system includes a power generation device (33) that generates power while a current sensor (40) detects forward power flow and another distributed power source (12), and a power control device (20) including an output unit (50) capable of outputting power from the other distributed power source (12) while the power generation device (33) and the other distributed power source (12) are disconnected from the grid. Output from the output unit (50) allows supply of dummy current to the current sensor (40), the dummy current flowing in the same direction as the forward power flow.
摘要:
In a mobile communication system including a plurality of communication terminals each equipped with a wireless communication device for performing wireless communication between the local station and the secondary station and a base station apparatus wirelessly connected to the plurality of communication terminals, the communication terminal comprises identification information regarding the local station and the secondary station, with which wireless communication can be performed, to the base station apparatus, while the base station apparatus comprises a receiving device for receiving the identification information, a interlinking device for interlinking communication packets for the plurality of communication terminals in accordance with a communication method adapted to the communication terminal and the received identification information, a selecting device for selecting the communication terminal corresponding to a transmission destination of the interlinked communication packets based on information representing communication conditions of the plurality of communication terminals, and a transmitting device for transmitting the interlinked packets to the selected communication terminal, wherein the communication terminal is constituted such that the interlinked packets are received, then, at least packets for the secondary station within the received interlinked packets are transferred to the secondary station by the wireless communication device. Thus, it is possible to apparently improve the throughput by effectively using time slots.
摘要:
A PCS (200) converts the output power from a plurality of distributed power supplies or the supply power to the distributed power supplies. The PCS (200) is provided with a plurality of converters for converting said output power or said supply power. In a first state, the converters convert the respective outputs of the distributed power supplies. In a second state, the converters perform a conversion on the output or input of at least one distributed power supply by using multiple converters.
摘要:
Diffraction of a noise may be reduced in an inexpensive manner without reducing power generation efficiency. A power generation control apparatus 10 includes a plurality of combinations of DC input terminals 101 and 102 for inputting DC power and a noise filter 11 connected to the DC input terminals 101 and 102, wherein each of the plurality of combinations has a different extreme value of frequency characteristics of the noise filter 11.
摘要:
In a power control system including a first controller configured to control supply of power from a photovoltaic module to a plurality of loads and a second controller configured to control charge/discharge of a storage battery, which is one of the plurality of loads, the first controller controls output following power consumption by the plurality of loads, and the second controller increases, during a self-sustaining operation, charging power of the storage battery and detects output fluctuation from the photovoltaic module or from the first controller along with the increase in the charging power, then based on the detected output fluctuation, controls charge of the storage battery, thus, even if connection to the grid is disconnected, supply power may be replenished by the load power used for supply to the predetermined loads, thereby allowing a stable power supply to the other loads.