A dispatchable datacentre energy system is provided. The system comprises a power conditioning system for providing conditioned power to a datacentre; wherein the power conditioning system includes a primary battery system for providing a primary energy reserve to the datacentre and being available to supply power to a grid operably connected to the datacentre in response to a dispatch request from a grid operator. A secondary battery system provides a secondary energy reserve to the datacentre and being available to supply power to the grid in response to the dispatch request. A power generation system provides a third energy reserve to the datacentre and being available to supply power to the grid in response to the dispatch request. A controller is provided for predicting grid conditions and being configured for selectively controlling at least one of the primary battery system; the secondary battery system and the power generation system in response to the predicted grid conditions; and wherein the controller is responsive to the dispatch request to adjust power consumption of the datacentre from the grid or power supply from at least one of the primary battery system, the secondary battery system and the power generation to the grid.

A method and controller are provided for operating an isolated or weakly connected electrical grid supplied by at least one fluctuating renewable energy source, such as wind or photovoltaic generation, in combination with a grid-forming controllable inverter coupled to a battery. The inverter operates as a master controller to regulate grid frequency and voltage, while the renewable sources operate as slaves. Battery charging and discharging are controlled according to deviations in grid frequency and charge level, with slopes defined for smooth power transitions. Additional selectively driven or non-driven alternators may be coupled in parallel with the inverter to stabilize frequency, provide inertia, reactive power, and short-circuit capacity, or support load changes. Control logic further manages integration of combustion engine-driven generators, resistive load banks, and external energy banks, while accounting for battery temperature and charge thresholds, thereby ensuring stable grid operation under fluctuating generation and demand conditions.

A microgrid controller may measure a group state-of-charge (SOC) of a group of energy storage systems (ESSs), calculate a total real power demanded by a plurality of loads, determine an available real power for a group of renewable-energy-based (REB) energy resource systems, determine whether the available real power is greater than a sum of the total real power and an ESS parasitic consumption of the group of ESSs, and, based on the available real power being greater than the sum, generate first control signals for turning off a group of fuel-based (FB) energy resource systems or for maintaining the group of FB energy resource systems in an off-state, or, based on the available real power being less than or equal to the sum, generate second control signals for turning on the group of FB energy resource systems or for maintaining the group of FB energy resource systems in an on-state.

Embodiments concern a plant for melting and/or heating metal material and a corresponding method to supply electrical energy. The plant comprises at least one induction furnace (11) and means (12) for supplying electrical energy to the induction furnace 11), wherein the electric power supply means (12) comprise at least one transformer (13) connected to an alternating current mains power network (14), at least one rectifier (15) located downstream of the transformer (13), at least one converter (16) located downstream of the rectifier device (15), and at least one coil (17) for melting and/or heating metal material.

A microgrid controller of a microgrid configured to receive load information corresponding to a plurality of loads connected to the microgrid, receive energy resource information corresponding to a plurality of energy resource systems connected to the microgrid monitor one or more microgrid parameters, according to a soft diagnostic condition, based on at least one of the energy resource information or the load information, detect a soft trigger event based on the one or more microgrid parameters satisfying the soft diagnostic condition, in response to the soft diagnostic condition being satisfied, monitor the one or more microgrid parameters, according to a hard diagnostic condition, based on at least one of the energy resource information or the load information, detect a hard trigger event based on the one or more microgrid parameters satisfying the hard diagnostic condition, and in response to the hard diagnostic condition being satisfied, generate a hard alarm.

A method of controlling an islanded power grid using multiple power generating units operates one of the power generating units in an isochronous mode to perform frequency control on the power grid and operates the other power generating units in droop mode to provide the overall instantaneous power needed on the grid. The method provides better overall efficiency of the power generating system while still enabling robust frequency control by determining the power generating unit to operate in the isochronous mode based on a predicted load demand or load demand change over a near-term time horizon. The method implements an optimization routine that determines the distribution of the power generating load across the power generating units in an efficient or optimal manner, and then selects the isochronous power generating unit as the power generating unit that has the highest capacity with the needed upward and downward reserve for making frequency control movements during the near-term time horizon.

The management system includes a display portion and a display control portion. The display portion displays a measurement value display indicating a measurement value of a measurement target of the power unit. The display control portion controls the display portion. The measurement value display includes a meter display of the measurement value and a numerical value display of the measurement value. The meter display is arranged in a meter region having either an arc shape or a circumferential shape. The numerical value display is arranged in a numerical value region arranged inside the meter region.

Methods for switching the power source supplying an alternating current (AC) electrical load from a first AC power supply to a second AC power supply comprising: (a) determining, during a time period, the zero voltage crossings of at the first and second AC power supplies; (b) estimating for a future time period, based on information obtained in said determining step (a), the times at which a series of future current zero-crossings of said AC load and at least the current zero-crossing of the second power supply; (c) based on said estimating step (b), determining whether during said future time period the time of said zero-crossing of said load current and the zero-crossing of the second power supply are within about 0.1 microseconds of each other; and (d) for a time period during which said zero crossings are estimated to be within 0.1 microseconds of each other, switching said load to said second power supply at said time at which said zero crossings are estimated to be within 0.1 microseconds of each other, wherein said switching: (i) uses a solid-state switching system and microprocessor-based control system for actuating said solid-state switching circuit; and (ii) accounts for any known actuation delay between the actuation signal from said microprocessor and the occurrence of said switching.

A system, module, and method for generating reliable, high quality power on demand and off-grid includes a photovoltaic array for delivering DC power; a generator having a size ranging from about 5 kW to about 30 kW, and comprising an engine powered by hydrocarbon gas filtered through a coalescing filter and comprising an extended lubrication system; an uninterruptible power supply (UPS) comprising a storage battery, the UPS being coupled to the photovoltaic array for receiving the DC power, and to the generator by a bi-directional inverter for receiving, transmitting, and qualifying DC or AC power; and an intelligent controller coupled to the UPS for controlling output of the DC or AC power to at least one air compressor capable of providing compressed air to one or more pneumatic devices.

A microgrid system is disclosed that integrates two or more energy sources and molecule production. The system comprises two energy generators, a molecule producer, and a central controller. The primary generator harnesses one energy type, while the secondary taps another. These power the molecule unit's production process. The controller coordinates operations by gathering data from both generators and considering target molecule volumes. The system then adjusts the generators to optimize performance and meet production goals.