Abstract: According to an embodiment, energy management system includes client and server. Server includes acquisition unit, estimation unit, calculator and controller. Acquisition unit acquires data concerning electrical equipment in a building including a storage battery from client. Estimation unit estimates energy demand and energy generation amount in building based on the data. Calculator calculates, based on the energy demand and the energy generation amount, operation schedule of the electrical equipment to optimize energy balance in building under a constraint that minimizes dump power to be discarded after storage battery is fully charged. Controller creates control information to control electrical equipment based on operation schedule.

Abstract: According to an embodiment, energy management system includes estimating module, preparing module and controller. Estimating module estimates energy demand of a home, and obtains estimated value of energy demand of home. Estimating module estimates energy generation amount and obtains estimated value of the generation amount. Preparing module prepares discharge strategy, based on the estimated energy demand and generation amount. Discharge strategy maximizes balance obtained by subtracting power purchase loss from power selling profit, by using a push-up effect. The controller controls discharge of the energy storage, based on actual values of the energy demand and the generation amount, and the discharge strategy.

Abstract: According to an embodiment, a status estimation apparatus includes detector, calculator, estimator and specifying unit. Detector detects a status change of any of electrical devices based on measurement data of a current flowing in a distribution line supplies power to the devices. Calculator calculates a current waveform change and a power change associated with the status change based on the measurement data. Estimator estimates a candidate originating from the status change based on the current waveform change. Specifying unit specifies a device caused the status change and a type of the status change based on the power change and an estimation result of the candidate.

Abstract: According to one embodiment, a device state estimation apparatus includes a detector and an operating state estimator. The detector detects devices in the ON operating state, based on a comparison between a calculated one of a first characteristic of a current or power harmonic in a power feed line and a reference one of the first characteristic which has been predetermined for at least one device. The operating state estimator extracts at least one set of the second characteristics from plural sets of second characteristics associated with harmonic, which have been predetermined. Each set of the second characteristics is for operating states of each of the devices. The one set of the second characteristics is for operating states of the device in the ON operating state which is detected by the detector.

Abstract: According to one embodiment, energy manager includes first estimator, second estimator, creator and controller. First estimator estimates power amount of power generator. Second estimator estimates energy demand. Creator creates schedule of devices based on estimated power amount and energy demand. Controller controls the devices based on the schedule. Second estimator includes storage, extractor and calculator. Storage accumulates load data. Extractor extracts load patterns including different load data. Calculator calculates weight for each of extracted patterns. Creator includes simulator and scheduler. Simulator simulates evaluated value of each schedule based on the pattern and weight. Scheduler creates schedule based on evaluated value.

Abstract: An energy management system (EMS) according to an embodiment has an EMS functional system which estimates at least one parameter value indicating a property of a power conditioner device. The functional system estimates at least one parameter value indicating a property of the power conditioner device on the basis of measured values of the power conditioner device for converting a DC power to an AC power to output the AC power to a power distribution system, the DC power having been inputted from a power generator or the power storage device.

Abstract: An energy management system includes an overcharging-overdischarging risk storage and a generation storage optimization planner. The overcharging-overdischarging risk storage stores an overcharging-overdischarging risk indicating a risk for overcharging-overdischarging to a power storage device of a hybrid power conditioner for converting a DC power to an AC power to output the AC power to a power distribution system, the DC power inputted from a power generator or the power storage device, the hybrid power conditioner converting an AC power into a DC power to output the DC power to the power storage device, the AC power inputted from the power distribution system. The generation storage optimization planner calculates a control plan value for charging-discharging to the power storage device of the hybrid power conditioner on the basis of at least the overcharging-overdischarging risk, a power demand estimation, and a generated-power estimation for the power generator of the hybrid power conditioner.

Abstract: A price information determination device of an embodiment includes a determiner. The determiner determines electric-price-related information to be output for a consumer from a harmonic intensity of electric current or electric power in an electric power system and from an electric power consumption reduction target; wherein the determination is made based on a correlation among the electric-price-related information, the harmonic intensity of electric current or electric power in the electric power system, and electric power consumption in the electric power system.

Abstract: According to an embodiment, an operation apparatus includes an operation unit which performs an operation for decomposing feature waveforms before and after a change time point at which the operating state of an instrument changes into one or more frequency components, a database unit which stores frequency features representing operating states of a predetermined instrument, a calculator which calculates a weighted distance, on polar coordinates, between an operation result and a feature stored in the database unit, the weighted distance being calculated for each operating state, and an estimation unit which estimates operating states of an instrument, based on the weighted distance.

Abstract: According to one embodiment, an electrical quantity adjusting apparatus connected to an electrical facility includes a memory unit that stores a target level which is a target electrical quantity, a presenting level deciding unit that decides a presenting level to an exterior, the presenting level being an electrical quantity relating to the electrical facility and corresponding to at least a part at the target level, a presenting level output unit that outputs the presenting level decided by the presenting level deciding unit to the exterior via a communication network, a presenting level receiving unit that receives a presenting level from the exterior via the communication network, and an adjusting unit that adjusts the electrical quantity relating to the electrical facility based on the target level, the presenting level decided by the presenting level deciding unit, and the presenting level received by the presenting level receiving unit.

Abstract: According to one embodiment, a device state estimation apparatus includes a detector and an operating state estimator. The detector detects devices in the ON operating state, based on a comparison between a calculated one of a first characteristic of a current or power harmonic in a power feed line and a reference one of the first characteristic which has been predetermined for at least one device. The operating state estimator extracts at least one set of the second characteristics from plural sets of second characteristics associated with harmonic, which have been predetermined. Each set of the second characteristics is for operating states of each of the devices. The one set of the second characteristics is for operating states of the device in the ON operating state which is detected by the detector.

Abstract: According to an embodiment, an estimation system estimates the power generation amount of a photovoltaic power generation unit. The estimation system includes a calculation unit and a coefficient optimization unit. The calculation unit calculates the estimated value of the power generation amount from the estimated value of a solar irradiance based on a power generation coefficient that converts the solar irradiance into the power generation amount. The coefficient optimization unit adaptively changes the power generation coefficient.

Abstract: According to one embodiment, a seawater desalination system includes a membrane filtering pump, a first to third flowmeter, a filtering membrane, a high-pressure pump, a pressure gauge, a reverse osmosis membrane, a discharge valve and a control module. The membrane filtering pump outputs seawater according to a first control signal. The first flowmeter measures flow rate Q1. The high-pressure pump outputs filtered water from the filtering membrane according to a second control signal. The first pressure gauge measures pressure P1. The reverse osmosis membrane desalinates the filtered water into fresh water. The second flowmeter measures flow rate Q2. The third flowmeter measures flow rate Q3. The discharge valve discharges a high-concentration salt water according to a third control signal. The control module performs first, second, and third flow rate control with reference to the flow rate Q1, Q2 and Q3 and the pressure P1.

Abstract: According to an embodiment, energy management system manages energy of customer, including a power generation device configured to generate power derived from renewable energy and a battery capable of being charged and discharged. System includes estimator, creator and controller. Estimator estimates energy demand of customer to obtain an estimated demand, and estimates the power generation amount of the power generation device to obtain an estimated power generation amount. Creator creates operation schedule of the battery, which can minimize electricity purchase cost using push up effect of electricity selling profit by discharging the battery, based on estimated demand and power generation amount. Controller controls battery based on operation schedule.

Abstract: According to an embodiment, energy management system manages energy of customer, including water heater uses renewable energy as heat source. Energy management system includes acquisition unit, estimator, creator and controller. Acquisition unit acquires data concerning energy associated apparatuses including water heater, power generator, battery and energy consuming device from customer. Estimator estimates energy demand and supply of customer based on the data. Creator creates operation schedules based on the estimated demand and supply so as to minimize energy cost of customer under a condition that surplus power to be discarded when the battery is fully charged is minimized. Controller controls energy associated apparatuses based on the operation schedules.

Abstract: According to an embodiment, energy management system manages energy of customer, having vehicle with battery, and a power generator. Energy management system includes estimator, creator, and controller. Estimator estimates demand of customer to obtain demand estimated value, and estimates power production amount of power generator to obtain production amount estimated value. Creator creates discharge strategy capable of maximizing differential between electricity purchase loss and electricity selling profit using push up effect of sold electricity amount by discharging battery under constraint for use of battery. Controller controls discharge of the battery based on actual values of demand, production amount, and discharge strategy.

Abstract: According to an embodiment, an energy management system includes estimator, calculator, creator and controller. Estimator estimates energy demand of customer to obtain estimated demand, and estimates power generation amount of renewable power generator to obtain estimated power generation amount. Calculator calculates operation schedule of nonrenewable power generator based on estimated demand and estimated power generation amount. Creator creates strategy maximizes difference between electricity cost loss and profit using push up effect by discharge of battery based on estimated demand and power generation amount, and schedule. Controller controls discharge of battery based on actual value of demand and power generation amount, schedule and strategy.

Abstract: According to an embodiment, energy management system includes estimating module, preparing module and controller. Estimating module estimates energy demand of a home, and obtains estimated value of energy demand of home. Estimating module estimates energy generation amount and obtains estimated value of the generation amount. Preparing module prepares discharge strategy, based on the estimated energy demand and generation amount. Discharge strategy maximizes balance obtained by subtracting power purchase profit and loss from power selling profit, by using a push-up effect. The controller controls discharge of the energy storage, based on actual values of the energy demand and the generation amount, and the discharge strategy.

Abstract: According to an embodiment, energy management system includes client and server. Server includes acquisition unit, estimation unit, calculator and controller. Acquisition unit acquires data concerning electrical equipment in a building including a storage battery from client. Estimation unit estimates energy demand and energy generation amount in building based on the data. Calculator calculates, based on the energy demand and the energy generation amount, operation schedule of the electrical equipment to optimize energy balance in building under a constraint that minimizes dump power to be discarded after storage battery is fully charged. Controller creates control information to control electrical equipment based on operation schedule.

Abstract: According to an embodiment, a status estimation apparatus includes detector, calculator, estimator and specifying unit. Detector detects a status change of any of electrical devices based on measurement data of a current flowing in a distribution line supplies power to the devices. Calculator calculates a current waveform change and a power change associated with the status change based on the measurement data. Estimator estimates a candidate originating from the status change based on the current waveform change. Specifying unit specifies a device caused the status change and a type of the status change based on the power change and an estimation result of the candidate.