Disclosed is a method for electrical supply of an apparatus by a system including an intermittent electrical source, electrical storage unit, a fuel cell, and an electrochemical unit for generating the fuel. The method includes steps of: determining a power balance of the system depending on the power consumed by the apparatus and supplied by the intermittent electrical source; receiving data representative of the stability of the power balance during a safety period; controlling the fuel cell and the electrochemical unit: to activate the electrochemical unit if the power balance is greater than a first threshold and the data are not characteristic of a subsequent decrease in the power balance; activating the fuel cell if the power balance is less than a second threshold, which is less than the first threshold, and the data are not characteristic of a subsequent increase in the power balance.

According to an embodiment, an operation plan planning device connected to an electric power system and plans an operation plan for responding to a request for a balancing power from the electric power system in a hydrogen production plant that includes a renewable energy generator, a water electrolysis device, and a hydrogen storage facility, the device comprises: an input part; a storage; a calculator including: a balancing power scenario creating unit to create a time series of a balancing power price and a time series of a balancing power ratio, and to create a balancing power scenario by synthesizing them; a mathematical optimization calculator; and a calculation condition setting unit; and an output part.

A system for collecting, generating, and transmitting Gigawatt scale energy is provided. The system comprises a geographically dispersed network comprising a plurality of nodes, each node comprising: a water source; renewable energy sources comprising: a wind turbine string of a plurality of wind turbines; and a solar photovoltaic string; a nodal substation in electrical communication with the renewable energy sources. The nodal substation comprises: at least one electrolyser in electrical communication with the renewable energy sources, the at least one electrolyser configured to convert water from the water source into hydrogen, or hydrogen compound, with electricity from the renewable energy sources; a compressor to compress hydrogen, or hydrogen compound, from the at least one electrolyser into a pipeline fluidly connecting each node. The nodal substation is positioned a distance from the renewable energy sources such that energy transfer efficiency to a load exceeds traditional high voltage power transmission.

A power supply system includes: a hydrogen generation device that uses electric power to generate hydrogen; a hydrogen storage device that stores hydrogen generated by the hydrogen generation device; a fuel cell system that uses hydrogen stored in the hydrogen storage device to generate electric power; a power storage device; and a control device executing at least one of first control and second control based on an electricity expense, the first control controlling a first ratio between electric power to be supplied from a natural energy power generation device to the hydrogen generation device and electric power to be supplied from the natural energy power generation device to the power storage device, the second control controlling a second ratio between electric power to be supplied from the power storage device to a load and electric power to be supplied from the fuel cell system to the load.

A first energy converter that can consume a first physical energy form of a first energy delivery network can be controlled to produce a second physical energy form of a second energy delivery network and inject the second physical energy form into the second energy delivery network. A second energy converter that can consume the second physical energy form of the second energy delivery system can be controlled to produce the first physical energy form of the first energy delivery network and inject the first physical energy form into the first energy deliver network. The controlling of the first energy converter and the controlling of the second energy converter can be coordinated. Related apparatus, systems, techniques and articles are also described.

A direct current bus control system including a direct current bus connecting between an input power supply and a load, including a main stabilizing device including a first charge-&-discharge element and a first power converter, and at least one sub-stabilizing device including a second charge-&-discharge element, a charge element, or a discharge element, and including a second power converter, wherein the first power converter is configured to derive a bus voltage target value according to a power storage amount index of the first charge-&-discharge element, and to bidirectionally pass direct current power, so that the voltage of the direct current bus matches the bus voltage target value, and the second power converter is configured to derive a current target value, and to pass direct current power, so that a current equal to the current target value flows.

A fuel preparation reaction system includes: an electrolytic hydrogen production equipment connected to a power supply device of a power generation plant and configured to produce hydrogen through electrolysis with surplus power from peak regulation of the power generation plant as a power supply; a fuel preparation reaction equipment configured to produce fuel with hydrogen and carbon dioxide; an input end of the fuel preparation reaction equipment is connected to a hydrogen output pipe of an electrolytic hydrogen production device, while another input end is connected to a supply source of carbon dioxide, a fuel output port being connected to a fuel collection device or a fuel utilization device. The system can directly consume peak-regulation power from a power plant, thereby improving power grid balance and differences between peaks and valleys, while achieving phase-changed storage of electric energy and effective usage of energy.

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 control system for a micro-grid comprising a plurality of electrolysers and one or more primary power sources, the control system being configured, under control of a processor, to: determine power available from the one or more primary power sources; and generate control signals configured to cause available power to be directed to one or more of said plurality of electrolysers; wherein, the control system is configured to be communicably connectable to in-situ diagnostic means associated with each of the electrolysers of said plurality of electrolysers for measuring a respective performance parameter, the control system being configured, under control of said processor, to receive signals from said in-situ diagnostic means and determine therefrom at least one performance parameter associated with said plurality of electrolysers.

The present invention discloses a synthetic ammonia system for making hydrogen by electrolysis in a thermal power plant includes an electrolytic hydrogen making device and a synthetic ammonia equipment; a power input end of the electrolytic hydrogen making device is electrically connected with a power generation output end of the thermal power plant; a hydrogen output end of the electrolysis hydrogen making device is connected with a hydrogen inlet of the synthetic ammonia equipment, a nitrogen inlet of the synthetic ammonia equipment is connected with a nitrogen source, the synthetic ammonia equipment is used for using the hydrogen produced by the electrolysis hydrogen making device and nitrogen of the nitrogen source to synthesize ammonia; an ammonia output end of the synthetic ammonia equipment is communicated to an ammonia supply pipeline and/or a liquid ammonia tank of the thermal power plant.