Abstract: A power transaction control device for virtually performing a power transaction between a plurality of grids includes a data storage unit that stores order information about power trading between the plurality of grids, and a matching unit that establishes the power transaction between a first site of a first grid of the plurality of grids and a second site of a second grid of the plurality of grids when a pair of the first site and the second site each having an identical price for a selling order and a purchase order of power is established, and when existence of a site that interchanges balancing power identical to balancing power interchanged by the first site in the first grid and existence of a site that interchanges balancing power identical to balancing power interchanged by the second site in the second grid are detected in accordance with order information.

Abstract: A control apparatus that controls power consumption in a service providing system configured to provide a service using servers provided, respectively, in a plurality of bases placed in a geographically dispersed manner, the apparatus including: a target power setting unit configured to set target power values of the respective bases based on requests for increases/decreases in power consumption in the bases equipped with the servers; and a load balance setting unit configured to perform load transfer among a plurality of servers based on the target power values.

Abstract: A feeding system that feeds power to a load includes only a single device configured to have neutral point high-resistance between a feeding line and the earth. The device functions as a ground fault overvoltage detection type of ground fault detector. The feeding system further comprises a control device. When the ground fault overvoltage detection type of ground fault detector detects a ground fault, the ground fault overvoltage detection type of ground fault detector transmits, to the control device via a signal line, a signal indicating that the ground fault has occurred. The control device instructs a breaker corresponding to the specific distributed unit in which it is determined that the ground fault has occurred to perform breaking.

Abstract: A feeding system feeds power from a power unit to a load via a feeding line and includes a protection device configured to operate by a current equal to or greater than a predetermined current; a monitoring unit configured to monitor whether an accident occurs in the feeding line; and a gate block unit configured to stop the feeding of the power of the power unit when the monitoring unit detects that an accident causing the protection device not to operate has occurred.

Abstract: Provided is a communication system including a communication building side communication device in a communication building and a user's home side communication device in a user's home that are connected via an optical fiber and a metal cable. When a power fed to the user's home side communication device from a commercial power supply stops, the communication building side communication device feeds the power to the user's home side communication device via the metal cable to operate the user's home side communication device, and the user's home side communication device communicates with the communication building side communication device via the optical fiber.

Abstract: A power consumption pattern extraction apparatus according to one embodiment includes a processor and a memory storing program instructions that cause the processor to receive, as an input, a total power consumption for every predetermined time interval over a predetermined time period by a consumer group which consumes power, create a total power consumption matrix that has the total power consumption, received as an input, as elements and has rows and columns corresponding to preset units, perform non-negative matrix factorization on the created total power consumption matrix to create a first factor matrix including basis vectors and a second factor matrix including coefficients for the basis vectors, and extract power consumption patterns and proportions of consumers that consume power in the power consumption patterns from the created first and second factor matrices.