An underwater data center includes a data center positioned in a water environment, powered by one or more sustainable energy sources. One or more data center nodes is coupled to the data center or included in the data center. A controller is coupled to the one or more data center nodes. A housing member houses the data center node under water. A passive cooling system coupled to the data center. The passive cooling operates by at least one of convention or conduction without moving fluid in the housing. The underwater data center is coupled to a sustainable energy source that provides energy to the underwater data center. The controller is configured to redistribute excess power from the sustainable energy source to an alternate source responsive to determine that the power from the sustainable energy source is greater than an amount needed to power the system.

The present disclosure provides a system-level protection system and method for sub/super-synchronous resonance/oscillation. The system includes a centralized protection coordinator arranged in a control center and a plurality of distributed protection relays arranged in a plurality of transformer substations or wind farms. Each distributed protection relay is configured to acquire a sub/super-synchronous impedance of the wind farm. The centralized protection coordinator is configured to acquire the sub/super-synchronous impedances measured by the plurality of distributed protection relays, to obtain a sub/super-synchronous aggregate impedance of the system according to a preset circuit topology and the sub/super-synchronous impedances, and to generate a system-level protection signal when the sub/super-synchronous aggregate impedance does not meet a stable condition. Each distributed protection relay is further configured to initiate a system-level protection according to the system-level protection signal.

Disclosed is a device for controlling a terminal connected in a multi-terminal high-voltage direct current transmission facility, the terminal being able to provide or draw power on the DC part of the facility comprised between an upper power limit and a lower power limit, the device further comprising at least one regulation circuit configured to vary the power provided or drawn by the terminal on the DC part of the facility, as a function of a voltage variation on the DC part of the facility, the device further comprising a limitation circuit configured to limit the variation of the power provided or drawn by the terminal, for a given voltage variation, when the power difference between the power provided or drawn by said terminal and the upper power limit or the lower power limit becomes smaller than a determined value.

An underwater data center system includes a data center positioned in a water environment, powered by one or more sustainable energy sources. One or more data center nodes are coupled to the data center or included in the data center. A controller is coupled to the one or more data center nodes. A housing member houses the data center node under water. The underwater data center is coupled to a sustainable energy source that provides energy to the underwater data center. One or more cables are coupled to the one or more data center nodes or the sustainable energy source. The system includes an underwater lattice AIoT device.

A power management system includes a power conditioner configured to condition and perform power factor correction on the electrical power supplied to the main circuit; an inverter, configured to receive direct current (DC) electrical power from a renewable source, and supply alternating current (AC) power to a main circuit that supplies power to an air conditioning system; and a controller configured to profile, using a power profiling meter, electrical power supplied to the main circuit; and modify operations of the air conditioning system or a battery management system based on the profiled electrical power available.

According to an example aspect of the present invention, there is provided a direct current (DC) to DC converter module for use between an electrical storage device, electric power source and an electric load. The converter module having at least one DC to DC converter; first input terminals connected to inputs of the DC to DC converter; output terminals connected to outputs of the DC to DC converter; second input terminals connected to the outputs of the DC to DC converter; and control circuitry connected to the DC to DC converter, the control circuitry being configured to monitor at least one of a voltage and current at the second input terminals. The control circuitry is configured to control the DC to DC converter in order to adjust a gain or conversion factor of the DC to DC converter based at least partially on the monitored voltage and/or current at the second input terminals.

A dispatchable power supply is disclosed, more particularly an off-grid power supply, more particularly an off-grid electric vehicle charge station, more particularly to an off-grid renewable energy powered electric vehicle charge station.

Provided is an arrangement for controlling a converter of a power generation system, for example, a wind turbine, the converter being connected to a connection point to a utility grid, the arrangement including: a measurement section adapted to provide measurement values indicative of values of current and voltage at the connection point, a main converter controller adapted to receive the measurement values and to generate a main converter control signal based on the measurement values, an active filter system adapted to receive the measurement values and to generate an active filter control signal based on the measurement values, an addition element adapted to add the main converter control signal and the active filter control signal and to supply the sum signal as a control signal to the converter.

A method for operating a wind turbine generator connected to a power network to account for recurring voltage faults on the power network caused by automatic reclosure of at least one circuit breaker following a short-circuit. The method comprises: identifying a deviation of voltage level of the power network from a normal operational voltage level of the network; determining that the identified deviation fulfils criteria for automatic reclosure; and operating the wind turbine generator in a recurring fault mode if automatic reclosure criteria are fulfilled. When operating the wind turbine generator in recurring fault mode, the method comprises: monitoring the recovery of the voltage level from the deviation; categorising the recovery of the voltage as one of at least a strong recovery or a weak recovery; and implementing a ride-through protocol according to the category of recovery.

The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm.