A hydroelectric power generation system includes at least one penstock extending through the sea floor a predetermined depth into the ground below the sea floor, a turbine connected to an underground distal end of each of the at least one penstock, and an underground reservoir to collect seawater flowing down through the at least one penstock and the connected turbine. The hydroelectric power generation system may be part of a distributed hydroelectric power generation system which includes a plurality of hydroelectric power generation systems, the distributed hydroelectric power generation system additionally including an underground reservoir to collect seawater flowing down through all of the penstocks and connected turbines in the plurality of hydroelectric power systems.

A radio frequency (RF) to direct current (DC) converter for an aerosol delivery device is provided. The aerosol delivery device includes a power source, and an antenna configured to receive radio-frequency (RF) energy from an external RF transmitter. The aerosol delivery device also includes a power harvesting circuitry configured to receive radio-frequency RF energy from an external RF transmitter, and harvest power from the RF energy to power or charge at least one electronic component of the aerosol delivery device.

Methods for implementing power delivery transactions between a buyer and a seller of electrical energy supplied to an electrical grid by an integrated renewable energy source (RES) and energy storage system (ESS) of a RES-ESS facility are provided. Estimated total potential output of the RES is compared to a point of grid interconnect (POGI) limit to identify potential RES overgeneration, and the buyer is charged if potential RES overgeneration is less than potential overgeneration during one or more retrospective time windows. The method provides a basis for the RES-ESS facility owner to be paid for an estimated amount of energy that did not get stored as a result of a grid operator not fully discharging an ESS prior to the start of a new day.

An integrated load management controller for directing electrical current generated by a plurality of solar photovoltaic modules exposed to ambient light selectively through a diverter to a battery bank for storage and to a current conditioner for supply of electrical current into an electrical grid, based on a supply demand communicated by an electrical grid demand controller, for managing the generation, storage, and supply of electrical current from the solar photovoltaic modules. A method of supplying supplemental electrical current to an electrical grid servicing load center using a solar-energy electricity generation system is disclosed.

A direct current power system. The direct current power system includes a direct current bus system, a solar power system, an energy storage system and a wind power system. The solar power system is configured to supply a first direct current power. The energy storage system has an input electrically coupled to the solar power system and is configured to supply a second direct current power at 380 volts to the direct current bus system. The wind power system includes is electrically coupled to the energy storage system and is configured to supply a third direct current power.

A system for energy storage and electricity generation is described. The system includes an energy storage system providing compressed air and an electricity generation system. The electricity generation system includes an airlift pumping system pneumatically coupled to the energy storage system. The airlift pumping system includes a water collecting tank containing collecting water and a riser tube having a base immersed in the collecting water and configured for injection of the compressed air into the riser tube through the air pipeline to provide air bubbles within the riser tube that produce an upward flow of the collecting water together with the air bubbles. The electricity generation system also includes a hydro-electric power system driven by upward flow of the collecting water together with the air bubbles to produce electricity, and a water heating system for heating the collecting water in the water collecting tank.

A photoelectric conversion module includes a substrate, a photoelectric conversion element mounted on the substrate, and a connector mounted on the substrate, the connector including a terminal that is electrically coupled to the photoelectric conversion element, wherein the connector is configured such that coupling the connector to a connector of another photoelectric conversion module causes the photoelectric conversion element to be electrically coupled to a photoelectric conversion element of the another photoelectric conversion module.

This evaluation device comprises: a mathematical model acquisition unit that acquires a mathematical model expressing the state of a power storage element; an operation data acquisition unit that acquires operation data which includes time-series input data input during operation of a system constructed on the basis of the numerical model, and time-series output data output by the system on the basis of the time-series input data; a processing unit that inputs the time-series input data to the numerical model and executes processing causing time-series model output data to be output from the numerical model; and an evaluation unit that evaluates the design and the operation of the system on the basis of the time-series output data and the time-series model output data.

This regional energy management device calculates the power interchange between consumers, on the basis of: storage battery level distribution indicating the relationship between storage battery levels and the position of storage batteries in a region at each time; excess or shortages of power for each consumer at each time, if a consumer has implemented a power supply equipment operation plan for fulfilling a consumer target index for that consumer; and an overall regional target index.

An integrated circuit includes: an over-discharge detection circuit that is supplied with electric power from a secondary battery, and is configured to detect whether or not the secondary battery is in an over-discharged state, and upon detecting that the secondary battery is in an over-discharged state over a predetermined period, stop a detection operation according to an enable signal; and a power down cancel circuit configured to, when the over-discharge detection circuit has stopped the detection operation, cause the over-discharge detection circuit to re-start the detection operation when a current supplied to a detection terminal from a power feeding circuit is a predetermined current or more.