Abstract: A backup power-supply system according to the present invention includes a detector, a power storage unit, and a controller. The detector is configured to detect an abnormality of a power supply that supplies electric power to loads. The power storage unit is configured to supply electric power to the loads when the detector detects the abnormality of the power supply. The controller is configured to monitor a remaining electric energy remaining in the power storage unit, and impose, when the remaining electric energy of the power storage unit is smaller than a threshold electric energy, a limitation on the loads to which the power storage unit supplies the electric power.

Abstract: A motor control circuit includes a first switch module, a three-phase inverter, and a control module, where a power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop, the three-phase alternating current motor inputs or outputs a current by using a wire N extending from a connection point of three phase coils, and the control module controls the three-phase inverter, so that the motor control circuit receives a voltage of the power supply module and outputs a direct current. A wire N extends from the three-phase alternating current motor, and further forms different charging loops with the three-phase inverter, the three-phase alternating current motor, and the power battery.

Abstract: A power sourcing equipment is provided. The power sourcing equipment may include an input terminal, an output terminal, a switch, and a device detection circuit. The input terminal may receive a power signal. The output terminal may be electrically coupled to a powered device via a coaxial cable, which transmits the power signal from the power sourcing equipment to the powered device or a data signal from the powered device to the power sourcing equipment. The switch may control an electrical connection between the input and output terminal(s). The device detection circuit may detect whether the data signal is being transmitted from the powered device to the power sourcing equipment. If the data signal is not being transmitted from the powered device to the power sourcing equipment, the device detection circuit may control an operation of the switch based on an electrical parameter associated with the powered device.

Abstract: A photovoltaic power generation system according to an embodiment of the present invention comprises: a first converter for converting and outputting power applied from a photovoltaic power generation panel; a second converter for receiving, via a first input/output terminal, the power output by the first converter, converting same, and outputting same via a second input/output terminal, or receiving power from the second input/output terminal, converting same, and outputting same via the first input/output terminal; a third converter for receiving power from the first converter or the second converter and charging an energy storage device, or transmitting power charged in the energy storage device to the second converter; and an active power filter for reducing ripples in the second converter, wherein power stored in the active power filter is transmitted to the first converter.

Abstract: A floating solar photovoltaic array having an energy management power control system configured to send power clipped by an inverter to the at least one powered accessory device which can be an aerator, a diffuser, a sub-surface agitator, a sub-surface water circulator, a sub-surface positioning/mooring system, a water quality sensor; a panel washer, or a bird removal system. The array has inflatable pontoons and an air manifold system which is powered by the solar photovoltaic modules can be used to adjust the angle of inclination of the solar photovoltaic modules to the sun. The powered accessories can also be powered by unclipped power or on-shore power or combinations thereof which can be controllably adjusted by the energy management control system over time.

Abstract: Systems and methods for controlling a plurality of DC/DC converters that are coupled to either a renewable energy source or an energy storage device. The system automatically detects the energy source coupled to the relevant DC/DC converter and operates accordingly. If the DC/DC converter is coupled to a renewable energy source (such as a PV panel), the system maximizes power extraction from the energy source. If the DC/DC converter is coupled to an energy storage device, the system performs charge/discharge functions for the attached energy storage device.

Abstract: Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Abstract: Provided is a method of generating a converter control signal for a generator side converter portion, in particular of a wind turbine, being coupled to a generator, in particular a permanent magnet synchronous machine, the method including: deriving at least one harmonic torque reference, in particular based on a harmonic torque demand and/or a torque indicating feedback signal; deriving at least one harmonic flux reference, in particular based on a harmonic stator voltage demand and/or a stator voltage indicating feedback signal; adding all of the at least one harmonic torque reference to a fundamental torque reference and subtracting an estimated generator torque to derive a torque error; adding all of the at least one harmonic flux reference to a fundamental flux reference and subtracting an estimated generator flux to derive a flux error; and deriving the converter control signal based on the torque error and the flux error.

Abstract: A dual battery system, including: a primary battery which drives a starter motor; an auxiliary battery which drives one or more auxiliary loads; an alternator which supplies current to recharge the primary battery; and a power supply circuit which supplies current from the alternator to recharge the auxiliary battery when a surplus condition is detected, the surplus condition indicating that the alternator is generating more electrical power than is required for recharging the primary battery, wherein the power supply circuit ceases to supply current to recharge the auxiliary battery when absence of the surplus condition is detected so that the primary and auxiliary batteries become electrically isolated, thereby ensuring that recharging of the auxiliary battery does not have an adverse effect on the level of charge of the primary battery.

Abstract: A method for operating an electrolysis device, having a converter which is connected on an AC voltage side to an AC voltage grid via a decoupling inductance and draws an AC active power from the AC voltage grid, and an electrolyzer, which is connected to the converter on the DC voltage side, is provided. The method includes operating the electrolysis device, when a grid frequency corresponds to a nominal frequency of the ACT voltage grid and is substantially constant over a time period, with an electrical power which is between 50% and 100% of a nominal power of the electrolyzer, and operating the converter in a voltage-impressing manner, such that an AC active power drawn from the AC voltage grid is changed on the basis of a change and/or a rate of change of the grid frequency in the AC voltage grid.

Abstract: An uninterruptible power supply device provided between a commercial power system and an essential load and supplying AC power to the essential load includes: a power supply part that has an energy storage device and is connected to a power line for supplying power from the commercial power system to the essential load; an open switch for opening/closing the power supply line, the open switch being provided on the power line on the commercial-power-system side of the power supply part; a system abnormality detection part for detecting a system abnormality occurring on the commercial-power-system side of the open switch; and a control part that, when the detected system abnormality is equal to or greater than the tolerance of the essential load or the power supply part against system abnormalities, opens the open switch and supplies AC power from the power supply part to the essential load.

Abstract: This control device for controlling an inverter circuit calculates an input current of the inverter circuit on the basis of an output current instruction value for controlling an output current of the inverter circuit, and calculates, on the basis of the calculated input current, an output voltage compensation amount according to the fluctuation amount of an input voltage of the inverter circuit.

Abstract: A system and method for automated shutdown, disconnect, or power reduction of solar panels. A system of solar panels includes one or more master management units (MMUs) and one or more local management units (LMUs). The MMUs are in communication with the LMUs with the MMUs and LMUs “handshaking” when the system is in operation. The MMUs are connected to one or more controllers which in turn are connected to emergency detection sensors. Upon a sensor detection of an emergency, the associated MMU is notified which in turn instructs associated LMUs to take appropriate action. In the event that communication with the MMUs has been cut off, the LMUs take the initiative to shut down, disconnect, or reduce the output of associated string(s) of solar panels.

Abstract: A thermoelectric recycling structure has a heat-conductive first component for engaging a heat source for receiving heat generated therefrom, a second component spaced from the first component, and a heat-nonconductive and electrons-and-holes-transportive thermoelectric layer sandwiched between the first and second components for receiving the heat from the first component and converting the received heat to electrical power.

Abstract: A power conversion apparatus (1) is used so as to be connected to three voltage units. The power conversion apparatus includes three power-conversion circuit units and a transformer (4). The three power-conversion circuit units are respectively connected to voltage units that differ from one another. Three coils (5) of the transformer (4) are connected to power-conversion circuit units that differ from one another. The three coils (5) are magnetically coupled with one another. The three coils (5) are arranged so as to be arrayed in a coil axial direction (z). One of the voltage units is a high-voltage battery. Among the coils other than a high-voltage battery-side coil (51) that is connected to the high-voltage battery, the coil (5) of which a power value that flows thereto is largest is arranged in a position that is adjacent to the high-voltage battery-side coil (51).

Abstract: An energy management system of a Remotely Operated Vehicle (“ROV”) has a generating unit located in a remote station on a water body and configured to generate a generated electrical power with a first maximum value); a ROV configured to operate in the water body and configured to absorb a second maximum value of an absorbed electrical power greater than the first maximum value; an electrical energy transmission line connected to the generating unit and to the ROV; and an electrical energy storage device located along the transmission line and/or on board the ROV.

Abstract: Electrical devices are connected to a DC voltage power supply grid being connected to a power source and having a supply voltage. Protection devices protect the electrical devices against an unintentional overcurrent sensed by a sensor unit. The protection devices disconnect the electrical devices from the DC voltage power supply grid when an overcurrent is detected. A pulse circuit having a capacitor with a semiconductor switching element connected in series with the capacitor is connected to respective inputs of the protection devices and supplies an amount of electric charge when a voltage dip occurs, wherein the amount of supplied electric charge is determined based on the detected overcurrent and a predetermined time period.

Abstract: The present disclosure discloses an electric tool power supply detachably installed on an electric tool, the electric tool power supply. The electric tool power supply comprises a power supply component, a first output interface, and a second output interface. The power supply component is configured to store and provide electrical energy. The first output interface is electrically coupled to the power supply component. The power supply component is configured to provide operating voltage for the electric tool through the first output interface. The second output interface is electrically coupled to the power supply component. The second output interface is further configured to electrically coupled to a starter of a vehicle. The power supply component is configured to output instantaneous large-current to the starter through the second output interface to start the vehicle.

Abstract: A vehicle includes: an electric prime mover; a frame member acting as a load bearing member of the vehicle; and a structural member functionally connected to the frame member. The structural member is capable of supporting the electric prime mover rotatably. The electric prime mover includes a shaft fixedly mounted to the structural member and that is disposed substantially in a lateral direction of the vehicle. The shaft fixedly supports a stationary member of the electric prime mover and the shaft rotatably supports a rotating member of the electric prime mover. A cable assembly extends outward from the stationary member through a cable path defined by the shaft. The cable path includes a portion provided with a caulking member capable of securely holding the cable assembly thereat. The cable assembly includes an external sheath forming at least an outer periphery of the cable assembly.

Abstract: The present disclosure describes a system that includes an energy source, a switching system, and a controller. The controller can be configured to receive, from a first REPP controller operating within a first REPP, an indication of an event at the first REPP; and responsive to receipt of the indication, adjust a switching position of the switching system to a first switching position to enable the energy source to provide energy to the first REPP and not any other REPP of the plurality of REPPs.