Abstract: The present invention is provided to solve problems such as increase in contact resistance, loss of flexibility, and increase in weight in the case of using a metal electrode or the like when producing a flexible secondary battery by using an organic conductive material. Organic conductive materials of the same type or different types whereof the charge carrier density can be controlled are used to prepare two organic conductive materials having different charge carrier densities, and these organic conductive materials are connected through electrolyte wherein protons may diffuse only, thereby producing a rechargeable and flexible secondary battery using no electrodes such as of metal or carbon constituting a positive electrode and a negative electrode and requiring no auxiliary agent or process such as material surface processing.

Abstract: A grid interconnection device includes a relay controller configured to control separation or interconnection of a relay; a receiver configured to receive, from a predetermined transmission path, power failure information containing at least local area information indicating an area in which a power failure occurs; a determination unit configured to determine an occurrence of a power failure in a power distribution system, when the power failure information includes local area information of an area to which the power distribution system belongs; and a detector configured to detect an islanding state. The detector increases detection sensitivity of the islanding state when the determination unit determines the power failure in the power distribution system. The relay controller performs separation control for the relay when the islanding state is detected by the detector.

Abstract: A grid interconnection device includes a relay controller configured to control separation or interconnection of a relay; a receiver configured to receive, from a predetermined transmission path, power failure information containing at least local area information indicating an area in which a power failure occurs; a determination unit configured to determine an occurrence of a power failure in a power distribution system, when the power failure information includes local area information of an area to which the power distribution system belongs; and a detector configured to detect an islanding state. The detector increases detection sensitivity of the islanding state when the determination unit determines the power failure in the power distribution system. The relay controller performs separation control for the relay when the islanding state is detected by the detector.

Abstract: This invention provides a method for suitably using a method for collectively receiving at a high voltage and distributing at a low voltage in collective housing. In this method for collectively receiving at a high voltage and distributing at a low voltage to a plurality of users, a distribution control part for collectively receiving power and distributing the power at a low voltage includes a server 12 and a control device 131 for controlling information on power consumed by the users. The control device 131 and the server are connected via a network. The server 12 grasps a maximum current capacity necessary for each user, determines a contracted current depending on the grasped maximum current capacity, and distributes power to each user.

Abstract: A system for reducing power without making users feel inconvenience and discomfort in collective housing or the like. The system includes a plurality of air conditioners and a central control unit connected with the air conditioners via a communication line. The central control unit controls the plurality of air conditioners to operate in time or alternately to prevent electric current concentration.

Abstract: A controller of a data communication apparatus according to the present invention stores information on each successful and unsuccessful data communication, a season, a data of the week, a time, and a data communication rate of the communication for each site in a data memory. The controller reads out a data communication rate at which a data communication succeeded from the data memory and directs a modem to conduct a communication at the data communication rate. A data communication is conducted at the directed data communication rate. These procedures ensure a secure link between sites and a secure data communication irrespective of a line distance between the sites etc.

Abstract: An object of the present invention is to provide a system capable of reducing optimally peak demand for power by using small capacity storage batteries.

Abstract: This invention provides a method for suitably using a method for collectively receiving at a high voltage and distributing at a low voltage in collective housing. In this method for collectively receiving at a high voltage and distributing at a low voltage to a plurality of users, a distribution control part for collectively receiving power and distributing the power at a low voltage includes a server 12 and a control device 131 for controlling information on power consumed by the users. The control device 131 and the server are connected via a network. The server 12 grasps a maximum current capacity necessary for each user, determines a contracted current depending on the grasped maximum current capacity, and distributes power to each user.

Abstract: This invention provides a system for reducing receiving power without making users feel inconvenience and discomfort in collective housing or the like. The system includes a plurality of air conditioners and a central control unit connected with the air conditioners via a communication line. The central control unit controls the plurality of air conditioners to operate in time or alternately to prevent electric current concentration.

Abstract: The present invention prevents an increase in an overvoltage and increases an optimum operating voltage of a power inverter. A photovoltaic power generation device is provided with a solar cell device 1, a power inverter 2 for inverting output from the solar cell device 1 into AC power, a current path circuit 3 connected in parallel between the solar cell device 1 and the power inverter 2, and a current detection circuit 4 for detecting a current feeding back to the solar cell device 1. When a current detected by the current detection circuit 4 reaches beyond a predetermined current value, the current path circuit 3 is cut off.

Abstract: A device for operating inverters according to the present invention can operate a plurality of inverters for converting DC output from a DC source such as a solar cell to AC output efficiently without relying on a particular inverter. The plurality of inverters are connected to the DC source through switches. DC output from a DC source is measured by a measuring device to determine the number of inverters to be operated on a basis of the output result from the measuring device. The inverters to be added or cut off are determined among the plurality of inverters at random on a basis of the random number and switches of the determined inverters are turned ON or OFF in order to select inverters to be operated.

Abstract: A device for operating inverters according to the present invention can operate a plurality of inverters for converting DC output from a DC source such as a solar cell to AC output efficiently without relying on a particular inverter. The plurality of inverters are connected to the DC source through switches. DC output from a DC source is measured by a measuring device to determine the number of inverters to be operated on a basis of the output result from the measuring device. The inverters to be added or cut off are determined among the plurality of inverters at random on a basis of the random number and switches of the determined inverters are turned ON or OFF in order to select inverters to be operated.

Abstract: The present invention is directed to a photo-voltaic apparatus comprising a photo-voltaic module having a plurality of photo-voltaic cells, and an inverter for converting a direct current output generated from the photo-voltaic cells into an alternating current and outputting the alternating current, the inverter being mounted on a surface opposite to the light receiving surface of the photo-voltaic module with a clearance provided therebetween, so that heat self-generated by the inverter can be efficiently radiated, and heat from the photo-voltaic module is not transferred to the inverter.

Abstract: A power-supply system involving system interconnection includes a plurality of AC modules, each of which includes a solar cell module and an inverter unit which outputs a single-phase alternating current. The AC modules are connected to the single-phase three-wire distribution line such that the number of AC modules connected to the outer conductor R is the same as the number of AC modules connected to the outer conductor T. Each AC module has three junction pole pieces. Adjacent AC modules are connected to each other via a connecting cable connected to the junction pole pieces. Each AC module has a change-over circuit so as to be selectively connected to one of the outer conductors R or T. The power-supply system further includes an independent operation control device for independently operating the AC modules when the connection between the AC modules and the commercial electric power system is cut.

Abstract: On a frame, a rotary grindstone is rotatably provided in such a manner that the upper surface of the rotary grindstone serves as a grinding side and a workpiece holding device which holds a workpiece and abuts the workpiece against the grinding side of the rotary grindstone is provided. Furthermore, a truing dressing device is provided on the frame, the truing dressing device bringing a rotary grindstone for truing dressing into contact with the grinding side of the rotary grindstone for the purpose of conducting truing dressing the grinding side of the rotary grindstone with retaining grinding conducted by means of the rotary grindstone.