An energy storage system and method employ electrolysis to convert excess electrical energy into hydrogen gas and oxygen gas stored in cryogenic flux capacitor units. When needed, the hydrogen and oxygen are liberated from the CFCs and mixed with supercritical CO.sub.2 and combusted in a combustion chamber without any nitrogen or air present to form a heated mixture of water and sCO2 that drives a turbine that creates energy that is returned to the power grid. The water in the sCO2 mixture is then extracted and returned to a reservoir for electrolysis when needed again, resulting in a closed system for storing electrical energy.

A hydrogen production system includes: a hydrogen production device connected to an electric power system or connected to a power generation device using renewable energy and configured to produce hydrogen by electrolyzing pure water; an output control unit capable of controlling an amount of power supplied from the electric power system to the hydrogen production device according to request from the electric power system; a first pure water line for supplying pure water to the hydrogen production device; a first adjustment device capable of adjusting an amount of pure water supplied to the hydrogen production device via the first pure water line; and a first control unit configured to control the first adjustment device, based on a power amount signal indicating information on an amount of power supplied from the electric power system to the hydrogen production device.

A power supply system is provided. The power supply system includes a first controller for controlling charge and discharge of a first electric storage apparatus and a second controller for controlling charge and discharge of a second electric storage apparatus. The first controller generates first scheduling data indicating transition of electric power to be charged and discharged from the first electric storage apparatus during a first prediction period. The second controller generates second scheduling data indicating transition of electric power to be charged and discharged from the second electric storage apparatus during a second prediction period containing the first prediction period. Generation of the first scheduling data is performed based on the second scheduling data previously generated by the second controller.

A power plant is configured to output power to a grid power system and comprises a hydrogen generation system configured to produce hydrogen, a gas turbine combined cycle power plant comprising a gas turbine engine configured to combust hydrogen from the hydrogen generation system to generate a gas stream that can be used to rotate a turbine shaft and a heat recovery steam generator (HRSG) configured to generate steam with the gas stream of the gas turbine engine to rotate a steam turbine, a storage system configured to store hydrogen produced by the hydrogen generation system, and a controller configured to operate the hydrogen generation system with electricity from the grid power system when the grid power system has excess energy and balance active and reactive loads on the grid power system using at least one of the hydrogen generation system and the gas turbine combined cycle power plant.

A method for operating a charging station for charging a plurality of electric vehicles, in particular electric cars, wherein the charging station is connected at a grid connection point to an electrical supply grid in order to be supplied with electrical energy from the electrical supply grid via said grid connection point, comprising the steps of drawing electrical energy from the electrical supply grid and charging one or more electric vehicles using the electrical energy drawn from the electrical supply grid, wherein the charging station is controlled in such a way that the electrical supply grid is electrically supported.

A capacitor based energy storage system (CBESS) and methods of using it are disclosed. The CBESS uses meta-capacitors in its capacitive energy storage devices (CESD) to configure capacitive energy storage cells (CESC), which are used to configure capacitive energy storage modules (CESM) to achieve the CBESS's function as an uninterruptible power supply. The CBESS is connected to a power generation system (PGS), a load, and a power grid. When the grid is in an abnormal state, the CESM is simultaneously charged with power from the PGS and used to supply power to the load. If a remaining amount of power of a CESM is less than a predetermined level, the CESM is charged with power from PGS or grid. The CBESS interfaces with a computer system or network to buy or sell electricity to the grid depending on grid electricity cost and CESD charging states.

A distributed direct current power system including an inverter to invert DC to alternating current (AC), a plurality of photovoltaic (PV) strings, and a plurality of maximum power point tracking (MPPT) converters coupled between the plurality of photovoltaic (PV) strings, respectively, and the central inverter, the plurality of MPPT converters configured to maximize solar power production by the plurality of PV strings and minimize mismatch between the plurality of PV strings. The system also including a plurality of batteries, a plurality of DC-DC battery converters (DCBC) coupled to the plurality of batteries and configured to manage charge and discharge of the plurality of batteries, enable interconnection of the plurality of PV strings and the plurality of batteries, and supply a constant medium DC voltage to the central inverter, and a hydrogen generation system in electrical communication with the inverter, the photovoltaic strings, or the batteries.

The present disclosure relates to a system for producing hydrogen from renewable energy and a control method thereof. The system includes a renewable-energy-based power generation system, a primary hydrogen production system, a secondary hydrogen production system, and a controller. An output end of the renewable-energy-based power generation system is connected to the primary hydrogen production system and the secondary hydrogen production system via an electrical conversion device. A capacity of the primary hydrogen production system is greater than or equal to a capacity of the secondary hydrogen production system. The controller is configured to monitor an output electrical performance parameter of the renewable-energy-based power generation system in real time, and control turn on and turn off of the primary hydrogen production system and the secondary hydrogen production system.

A solar and electrolytic system includes a moisture harvesting solar system that includes a photovoltaic module having a light receiving surface, a water collection subassembly, and a cleaning subassembly, The water collection subassembly has a water collection vessel and the cleaning subassembly has a water dispensing unit fluidly coupled to the water collection vessel. The solar and electrolytic system also includes an electrolysis cell with an anode and a cathode each extending into an electrolysis tank and each electrically coupled to a power supply. One or more intersystem fluid pathways fluidly couple the water collection vessel of the moisture harvesting solar system with the electrolysis tank of the electrolysis cell and one or more electrical pathways electrically couple the photovoltaic module of the moisture harvesting solar system with the power supply of the electrolysis cell.

Provided is an apparatus for generating a operation plan of a hydrogen production system comprising a hydrogen production apparatus, comprising: a demand predicting unit for generating a predicted demand amount for each of a plurality of types of hydrogen with a different environmental load of production over a target period of the operation plan; and an operation planning unit for generating the operation plan, which is for generating a plurality of types of hydrogen with a different environmental load of production by the hydrogen production apparatus, based on a predicted hydrogen demand amount of each of the plurality of types of hydrogen.