Abstract: A high efficiency solar power system combining photovoltaic sources of power (1) can be converted by a base phase DC-DC photovoltaic converter (6) and an altered phase DC-DC photovoltaic converter (8) that have outputs combined through low energy storage combiner circuitry (9). The converters can be synchronously controlled through a synchronous phase control (11) that synchronously operates switches to provide a conversion combined photovoltaic DC output (10). Converters can be provided for individual source conversion or phased operational modes, the latter presenting a combined low photovoltaic energy storage DC-DC photovoltaic converter (15) at string or individual panel levels.

Abstract: An embodiment of the present disclosure provides a grid-forming inverter comprising: a power stage to convert electric power according to on/off controls of switching devices and to output the converted electric power to a grid; and a control circuit to calculate a frequency command value in proportion to a direct current input voltage and to control the switching devices using pulse width modulation (PWM) according to the frequency command value.

Abstract: A power distribution unit (PDU) of a disclosed embodiment comprises a configurable PDU architecture providing phase redundancy. The configurable PDU architecture comprises a switch bank having power inputs Phase A, Phase B, Phase C, and Neutral and providing respective phase outputs to respective connected loads. A switching control receives sense inputs and provides configuration controls to the switch bank. The switch bank switches in an alternate phase input when a primary phase fails providing phase redundancy and continued reliable operations with the loss of a single input phase. The PDU of one or more disclosed embodiments enables universal input power configurations including Single phase, Delta, and Wye configurations.

Abstract: Techniques for pre-charging buses of an electric vehicle include causing a first DC bus, while a high-voltage battery is decoupled from the first DC bus, to be pre-charged by a low-voltage battery using a first DC-DC converter coupled between the first DC bus and the low-voltage battery. The techniques also include causing a second DC bus to be pre-charged using a second DC-DC converter coupled between the first DC bus and the second DC bus, which may be performed after or during pre-charging the first DC bus. The techniques additionally may include causing an AC bus to be pre-charged using a DC-AC converter coupled to the second DC bus and to the AC bus, while a grid contactor is open.

Abstract: Examples described herein relate to energy management and power optimization. A maximum power point tracking (MPPT) unit is coupled with multiple strings of solar panels. Each string of solar panels includes multiple solar panels, and each solar panel is coupled with a power optimizer. The MPPT unit monitors the multiple strings of solar panels, detects a voltage decrease from a first voltage value to a second voltage value at a first string of solar panels among the multiple strings of solar panels, and transmits one or more signals to one or more power optimizers corresponding to one or more solar panels in a second string. The one or more signals cause the one or more power optimizers to regulate voltages at the one or more solar panels, so that a voltage at the second string of solar panels is substantially equal to the second voltage value.

Abstract: The system includes a plurality of branch circuits including a plurality of branch relays, the plurality of branch relays coupled to at least one busbar and configured to be coupled to a plurality of circuit breakers, a deadfront arranged in front of the plurality of branch relays, and a neutral busbar arranged in front of the deadfront and coupled to the plurality of circuit breakers through openings in the deadfront. The deadfront may be an installer deadfront.

Abstract: Systems and methods for implementing over current protection for wireless power devices is described. The method can include receiving alternating current (AC) power from a wireless power transmitter. Rectifying the AC power into a rectified voltage. Generating an output voltage using the rectified voltage. Determining whether an output current of the output voltage can be within a range of current values. In response to output current being within the range of current values, regulating the rectified voltage to a level that minimizes a difference between the rectified voltage and the output voltage. In response to output current being outside of the range of current values, determining whether output current can be greater than or less than an upper bound of the range of current values. In response to the output current being greater than the upper bound of range of current values, shutting down the wireless power transfer system.

Abstract: A wireless power transmitting device according to an embodiment of the present specification transmits wireless power to a wireless power receiving device, and includes a power conversion circuit including a primary coil for transmitting the wireless power to the wireless power receiving device and a communication/control circuit for communicating with the wireless power receiving device and controlling the power conversion circuit, wherein, to detect foreign substances between the wireless power receiving device and the wireless power transmitting device, the communication/control circuit stops the transmission of the wireless power for a slot time, detects the foreign substances on the basis of a change in the voltage or current of the primary coil within the slot time, and sets the slot time to start from a point in time when the current of the primary coil is 0.

Abstract: A roadway section for enabling dynamic wireless power transfer to a vehicle. The roadway section may include pavement material defining a driving surface for the vehicle, a wireless power charger with an electrically-conductive element, and a shroud at least partially circumscribing the electrically-conductive element. The wireless power charger and the shroud are embedded in the pavement material. The electrically-conductive element is in electrical communication with a power supply and is configured to emit a magnetic field for dynamic wireless power transfer to the vehicle. The shroud includes a magnetic shielding material along a bottom side of the electrically-conductive element opposite the driving surface. The magnetic shielding material forms a plate having a non-planar cross-sectional profile.

Abstract: An electrical power system includes: an electrical power source; power converter connected, at an input side, to the electrical power source and including first and second DC output terminals and a capacitor connected between the output terminals; a DC electrical network having first and second input terminals; a resistor; and switch arrangement including several switches. The switch arrangement has: a first configuration in which the resistor is connected in series between the first output terminal of the power converter and the first input terminal of the DC electrical network; a second configuration in which the first output terminal of the power converter is connected to the first input terminal of the DC electrical network bypassing the resistor; and a third configuration in which the resistor is connected in parallel across the capacitor. The electrical power system further includes a control system for controlling a configuration of the switch arrangement.

Abstract: Disclosed are an energy management method, system, computer device and readable storage medium. The method includes: obtaining a first current output power and a previous output power of a first energy supplier; obtaining a current power change rate of the first energy supplier according to the first current output power and the previous output power; obtaining a first reference power of the first energy supplier according to the first current output power, the previous output power and the current power change rate; obtaining a second current output power of a second energy supplier; obtaining a second reference power of the second energy supplier according to the first current output power, the second current output power and the first reference power; obtaining current flow rates of first and second gas and a current furnace temperature; and obtaining a reference flow rate of the first gas and a reference furnace temperature.

Abstract: The present disclosure relates to a system for stabilising a DC link that supplies power to a load. The system comprises a power converter electrically coupled to the DC link. The power converter is configured to: supply power to or draw power from the DC link; monitor a voltage of the DC link; and control the power supplied to, or drawn from, the DC link based on the monitored voltage of the DC link and an operating voltage setpoint.

Abstract: An energy transfer module for transferring energy to a mobile device, in particular a handheld power tool, wherein the energy is transferred wirelessly, including at least a first and a second transmitting coil. The first transmitting coil can be operated with a first alternating current and the second transmitting coil can be operated with a second alternating current, wherein the energy transfer module is configured so that, at least during an energy transfer phase of the energy transfer module, the absolute value of the relative phase angle (beta) of the currents flowing in the first and second transmitting coils is not more than 45° or the relative phase angle (beta) is minimized. A transmitting unit, to an energy transfer system and to a method for operating at least one of the aforementioned apparatuses.

Abstract: A power fusion system, power supply device, and power supply system. The module comprises a control unit, at least one power conversion unit and a DC/AC unit; the power conversion unit is configured to convert current output by the power supply to DC; the DC/AC unit is connected with all installed power conversion units, and configured to convert DC output by one or more power conversion units into AC meeting power supply demand; the control unit can communicate with all installed power conversion units and DC/AC unit, and is configured to control operation of the power conversion unit and DC/AC unit. The power fusion system can convert current output by one or more power supply modules into AC meeting the demand, so as to supply power to the load corresponding to the demand and can supply power cooperatively to improve matching degree and adaptability of power supply.

Abstract: An uninterruptible power supply includes a first input configured to be coupled to a primary power source (PPS); a power factor correction (PFC) converter coupled to the first input; a second input configured to be coupled to a secondary power source (SPS); a DC/DC converter coupled to the second input; an output configured to be coupled to a load; and at least one controller configured to control the DC/DC converter to provide secondary power derived from the SPS to the output, control, while an amount of power available from the PPS is sufficient to satisfy the load, the PFC converter to provide primary power derived from the PPS to the output in parallel with the DC/DC converter providing the secondary power to the output, receive at least one of a charge or discharge parameter associated with the SPS, and determine a state of health of the SPS based on the at least one of the charge or discharge parameter.

Abstract: The disclosure describes a voltage source inverter having an internal control loop with a setpoint input for a setpoint signal for an active power component of the inverter, and an actual value input for a current actual value of the active power component of the inverter. The inner control loop is a controller with a proportional component and an integral component and is configured to determine a frequency shift as a controller output variable from the difference between the setpoint signal and the current actual value. The inverter is configured to provide an AC voltage that deviates from a predefined fundamental frequency by the determined frequency shift. An outer control loop of the inverter is configured to supply a setpoint signal to the setpoint input as a function of the determined frequency shift in islanded operation. A power generation system can comprise two such inverters.

Abstract: The present invention discloses a reactive power sharing method for parallel inverters based on virtual impedance and a dynamic droop coefficient. The virtual impedance is constructed through the parameter design of voltage and current double-closed loop controllers and a line impedance observer, to realize power decoupling. A dynamic droop coefficient is constructed to adjust the output voltage of a virtual synchronous generator adaptively, and the output reactive power of inverters is controlled indirectly to achieve reactive power sharing according to capacities. The present invention does not need a communication network between the inverters, and only needs the local variable information of each inverter, so that a microgrid has the function of “plug and play”.

Abstract: A portable measuring instrument is a portable measuring instrument that receives power transferred from a wireless power transfer apparatus for transferring power wirelessly, the measuring instrument includes a plurality of power receiving antennas that receive power transmitted from the wireless power transfer apparatus, a posture detection part that detects a posture of the measuring instrument, and a signal transmission part that transmits a beacon signal including information indicating the posture detected by the posture detection part, wherein after the signal transmission part transmits the beacon signal, any of the plurality of power receiving antennas receives power from the wireless power transfer apparatus.

Abstract: A system to manage power consumption from a grid includes a building switchgear; an energy storage system (ESS) coupled to the building switchgear to selectively provide power in response to a customer power demand to prevent a customer grid power consumption from spiking and peaking at grid imbalance highest cost on peak times.

Abstract: The inventive technology, in certain embodiments, may be generally described as a solar power generation system with a converter, which may potentially include two or more sub-converters, established intermediately of one or more strings of solar panels. Particular embodiments may involve sweet spot operation in order to achieve improvements in efficiency, and bucking of open circuit voltages by the converter in order that more panels may be placed on an individual string or substring, reducing the number of strings required for a given design, and achieving overall system and array manufacture savings.