Abstract: A method of charging an energy storage element; wherein the energy storage element comprises a plurality of energy storage units arranged for storing electrical energy; wherein the method comprises: determining a voltage of each of the plurality of energy storage units; determining a state-of-the-charge, SoC, of each of the plurality of energy storage units; determining a maximum power voltage, Vmp, of a solar power source; selecting (one or more) energy storage units of the plurality of energy storage units to form a charging set comprising a series and/or a parallel combination of the selected (one or more) energy storage units; wherein the selection is based on the determined maximum power voltage, Vmp, and on a first time period and a second time period associated with a first sun irradiance level and a second sun irradiance level respectively.

Abstract: A control system may include a direct-current (DC) power bus for charging (e.g., trickle charging) internal energy storage elements in control devices of the control system. For example, the control devices may be motorized window treatments configured to adjust a position of a covering material to control the amount of daylight entering a space. The system may include a DC power supply that may generate a DC voltage on the DC power bus. For example, the DC power bus may extend from the DC power supply around the perimeter of a floor of the building and may be connected to all of the motorized window treatments on the floor (e.g., in a daisy-chain configuration). Wiring the DC power bus in such a manner may dramatically reduce the installation labor and wiring costs of an installation, as well as decreasing the chance of a miswire.

Abstract: Responsive to a magnitude of current associated with power from a vehicle being supplied to upfitter loads approaching a predefined threshold, a controller discontinues supply of power to vehicle loads according to a user defined priority order of the vehicle loads such that the vehicle loads of lowest priority among the priority order of the vehicle loads are sequentially shed to maintain the magnitude less than the predefined threshold.

Abstract: A diesel-storage independent microgrid and a virtual dynamic synchronous control method and system are described. An adaptive dynamic synchronous torque and pre-synchronous compensation phase angles are introduced into a energy storage converter control system to realize output voltage and power synchronization before and after parallel connection of the system. By compensating the pre-synchronous phase angles, the phase angles of a diesel generator and an energy storage converter are kept consistent before parallel connection, which reduces current impact during the parallel process. By introducing the adaptive dynamic synchronous torque, after the parallel connection of the system, the virtual torque of the energy storage converter can be adaptively and dynamically adjusted according to the current accelerations of the diesel generator and the energy storage converter under the condition that the inertial parameter of a diesel engine is black-boxed.

Abstract: A power system may comprise a power system controller and a power storage. The power system controller may comprise a first pair of power terminals, a second pair of power terminals, at least one switch, and a central controller coupled to the at least one switch. The power storage may comprise storage power terminals connected to the first pair of power terminals. The second pair of power terminals may be coupled to a power source. The power system controller may be configured to control the switch to connect and disconnect the second pair of power terminals. The power system controller may be configured to receive power from the power storage during a process of connecting and disconnecting the second pair of power terminals.

Abstract: Disclosed herein are systems and methods for energy management. A system, such as a vehicle, includes power packs and a photovoltaic array with interconnected photovoltaic cells that supplies electric charge to the power packs for charging the power packs. A charge management database stores data tracking respective charge cycles of the power packs based on the charging and discharging of the power packs. An energy control system controls flow of power in the system to control the charging and the discharging of the power packs, optimizes the flow of power in the system based on the respective charge cycles as tracked in the data stored in the charge management database, and updates the charge management database based on the optimization(s). An output interface outputs a status of the power packs based on the flow of power, for instance to indicate effect(s) of the optimization(s) on the power packs.

Abstract: A power reception device 3 includes: an estimation circuit 28 estimating a load resistance of an entire contactless power feed apparatus 1; and a reception-side communicator 27 transmitting an estimated value of the load resistance of the entire contactless power feed apparatus 1 to a power transmission device 2. The power transmission device 2 has a power supply circuit 11 supplying AC power to a transmission coil 12 supplying power to the power reception device 3. The power transmission device 2 further includes a control circuit 18 decreasing an input/output gain of a transmission-side DC-DC converter 31 included in the power supply circuit 11 by a predetermined amount when the estimated value of the load resistance is less than a predetermined allowed lower limit, and maintaining or increasing the input/output gain when the estimated value of the load resistance is equal to or greater than the predetermined allowed lower limit.

Abstract: Disclosed is a nuclear reactor system for use with a power grid. The nuclear reactor system comprising a nuclear reactor, an energy storage system coupled to the nuclear reactor, and a control circuit coupled to the nuclear reactor and the energy storage system. The control circuit is configured to monitor a power demand of the power grid, monitor a power output generated from the nuclear reactor, detect a change in the power demand, cause the energy storage system to temporarily compensate for the change in the power demand, and adjust the power output based on the change in the power demand.

Abstract: A method for energy management in a mobile medical unit, including: using a microgrid assessment tool to capture both granular load profiles and power quality data for a mobile medical unit powered by a microgrid; modeling a plurality of scenarios, using the data captured by the microgrid assessment tool to determine hybrid power system optimization; and supplying power to the mobile medical unit from one or more of a plurality of energy sources in the hybrid microgrid based on the optimization results. The plurality of energy sources includes at least one renewable energy source and at least one non-renewable energy source. A mobile medical system that includes a mobile medical unit and a hybrid microgrid configured to provide power to the mobile medical unit. The hybrid microgrid includes a measurement, verification, and control module, at least one renewable energy source, at least one energy storage device, and a generator.

Abstract: A method for controlling a power supplied to an electrical network having a rated frequency, by an electrical production set comprising an electrical production plant and a battery energy storage system, comprises acquisition, by a hybridization controller, of a first signal representative of the power to be supplied to the electrical network; production, by the hybridization controller, of a power setpoint for the battery energy storage system; production, by the hybridization controller, of a substitution signal representative of the power to be supplied by the electrical production plant alone; and acquisition, by a plant controller comprising an input for acquisition of a signal representative of the power to be supplied by the electrical production plant, of said substitution signal.

Abstract: A power conversion device includes a converter, an inverter, a converter control circuit, a virtual synchronous generator control circuit to impart a transient characteristic of a synchronous generator to the inverter, and an inverter control circuit to control the inverter. The virtual synchronous generator control circuit calculates a switching frequency at which charge/discharge of the distributed power source is switched, based on information necessary for virtual synchronous generator control. The converter control circuit uses the switching frequency to create a frequency range of AC system voltage for providing a dead zone in which charge/discharge power of the distributed power source is zero in a drooping characteristic of the power conversion device, or a hysteresis in switching of charge/discharge of the distributed power source. The converter control circuit performs control such that charge/discharge power of the distributed power source becomes zero in the frequency range.

Abstract: A power supply for an aircraft comprises: an input configured to receive electrical power from an energy source, an output for supplying electrical power, a plurality of converters, each of which being electrically connected to the input to receive electrical power from the input and being configured to convert the electrical power and to provide the converted electrical power to the output, and a control unit being configured to individually control each of the plurality of converters.

Abstract: The invention concerns a wind power plant comprising a plurality of wind turbines connected to a distribution line; a connection station comprising a plurality of switchgear devices connected to a substation via the distribution line; and, a plurality of power cables connecting the plurality of switchgear devices and the plurality of wind turbines. The plurality of power cables are respectively arranged to connect a single switchgear device of the plurality of switchgear devices and a single wind turbine of the plurality of wind turbines.

Abstract: A redundant power supply has a first power supply, which is disconnectedly connected to a busbar by means of a first tie switch and is connectable to a first load without a tie switch, and having a second power supply, which is disconnectedly connected to the busbar by means of a second tie switch and is connectable to the first load without a tie switch, and having a third power supply, which is disconnectedly connected to the busbar by means of a third tie switch and is connectable to a second load without a tie switch, and having a fourth power supply, which is disconnectedly connected to the busbar by means of a fourth tie switch and is connectable to the second load without a tie switch. All of the tie switches are closed during trouble-free operation.

Abstract: Disclosed is a power management device configured to stably supply power and save power by managing power quality includes a first switch, a converter, a voltage detector, a current detector, and a processor configured to control power of the power source to be supplied to the load through the first switch by turning the first switch on in an echo compensation mode, monitor power quality based on the detected current and the detected voltage, and when it is determined that the power quality has been abnormal, perform compensation control through the converter in a turned-on state of the first switch or control the power of the power source to be supplied to the load through the converter by turning the first switch off.

Abstract: This application discloses a photovoltaic device, a photovoltaic inverter, a system, and a power limit control method. The device includes a DC-DC converter circuit, an inverter circuit, and a controller. An input end of the DC-DC converter circuit is connected to a photovoltaic array, and an output end of the DC-DC converter circuit is connected to an input end of the inverter circuit. The controller is configured to: receive a power scheduling instruction, where the power scheduling instruction carries a power reference value; and when the power reference value is less than a power at a maximum power point, reduce an input current of the DC-DC converter circuit; or when an input voltage of the DC-DC converter circuit is greater than or equal to a preset voltage, increase an input current of the DC-DC converter circuit until an output power of an inverter becomes consistent with the power reference value.

Abstract: An inductive stove appliance that includes a stove housing; a minimum of three cooking zones, with at least two of the cooking zones comprising induction coils; an electric oven; a set of cooktop and oven controls configured for operation of the inductive stove appliance, including operation of the minimum of three cooking zones and the electric oven; a power cord with a plug configured to couple with a standard 120V, 15A-30A, electrical power receptacle of a power distribution system; and a battery system disposed within the stove housing of the inductive stove appliance with one or more batteries integrated into the stove housing configured to: store power obtained from the power cord with the plug coupled with the electrical power receptacle of the power distribution system, power the minimum of three cooking zones of the inductive stove appliance, and power the electric oven of the inductive stove appliance.

Abstract: An inductive stove appliance that includes a stove housing; a minimum of three cooking zones, with at least two of the cooking zones comprising induction coils; an electric oven; a set of cooktop and oven controls configured for operation of the inductive stove appliance, including operation of the minimum of three cooking zones and the electric oven; a power cord with a plug configured to couple with a standard 120V, 15A-30A, electrical power receptacle of a power distribution system; and a battery system disposed within the stove housing of the inductive stove appliance with one or more batteries integrated into the stove housing configured to: store power obtained from the power cord with the plug coupled with the electrical power receptacle of the power distribution system, power the minimum of three cooking zones of the inductive stove appliance, and power the electric oven of the inductive stove appliance.

Abstract: The invention relates to a system and method for supplying AC output power to at least one desired AC load. Values of electrical currents and/or voltages are measured by an energy measurement device within the system and an AC output power demand of the AC load is determined. An inverter unit inverts DC power received via the internal DC bus to AC power to supply AC output power to the connected AC load. The invention further comprises that the controller controls the electrical energy consumption of the inverter unit based on the AC output power demand.

Abstract: A DC bus control system for controlling power fluctuations in a DC bus connecting an input power source and a load, comprising: a main stabilization device including a first charging/discharging element and a first power converter; a plurality of the sub stabilization devices including a second charging/discharging element, a charging element, or a discharging element and a second power converter, wherein the plurality of the sub stabilization devices includes a first sub stabilization device having a charging/discharging element and a second power converter and at least one second sub stabilization device having a charging element or a discharging element and a second power converter, and a response speed of the first sub stabilization device is set such that a charging amount of the charging element or a discharging amount of the discharging element of the second sub stabilization device changes with a predetermined time constant.