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.

Abstract: Embodiments of the invention provide IGBT circuit modules with increased efficiencies. These efficiencies can be realized in a number of ways. In some embodiments, the gate resistance and/or voltage can be minimized. In some embodiments, the IGBT circuit module can be switched using an isolated receiver such as a fiber optic receiver. In some embodiments, a single driver can drive a single IGBT. And in some embodiments, a current bypass circuit can be included. Various other embodiments of the invention are disclosed.

Abstract: A microinverter for use with a single photovoltaic (PV) panel. The self-contained unitary package includes a low voltage power module (LVPM), a high voltage power module (HVPM), a transformer passing power between the two modules, a DC filter to filter incoming DC power from the PV panel, and an AC power to filter 3-phase power to be provided to an AC power bus connected to an AC power grid. The microinverter package couples to a single PV panel and converts incoming DC power from the PV panel to 3 phase AC power suitable for the AC power grid. All necessary electronics and conversion circuitry and components are contained in the package and provides a plug and play solution between the PV panel and the AC grid.

Abstract: A power transmitting apparatus measures a waveform attenuation rate of a transmission power waveform, at a transmission antenna, in a state in which the power transmission by the power transmitting is restricted, sets a threshold used for detecting a foreign object between the power transmitting apparatus and the power receiving apparatus on the basis of the measured waveform attenuation rate, and determines whether or not the foreign object is present on the basis of the waveform attenuation rate measure after the threshold is set and the threshold.

Abstract: In accordance with various embodiments of the present disclosure, a method for confirming kickback is provided. In some embodiments, the method for confirming kickback comprises, in response to an indication of a kickback occurrence, comparing an input current to a predetermined current threshold; if the input current is greater than the predetermined current threshold for a first predetermined amount of time, generating a kickback interrupt signal; if the input current is not greater than the predetermined current threshold, comparing an input voltage to a predetermined voltage threshold; if the input voltage is less than the predetermined voltage threshold for a second predetermined amount of time; generating a kickback interrupt signal; and if the input voltage is not less than the predetermined voltage threshold and the input current is not greater than the predetermined current threshold, generating a false positive (FP) signal.

Abstract: A voltage regulation method for a multi-converter parallel connection system is provided. The multi-converter parallel connection system includes N converters. Alternating-current sides of the N converters are connected to an alternating-current bus. N is an integer greater than or equal to 2. M converters among the N converters are switched from a current-source operation mode to a voltage-source operation mode to form an alternating-current bus voltage, when the N converters are disconnected from a power grid or the power grid fails. M is an integer less than or equal to N. Remaining N-M converters among the N converters are switched from the current-source operation mode to the voltage-source operation mode after the alternating-current bus voltage is formed.

Abstract: A microgrid has a microgrid controller that controls power delivery from two or more energy sources to one or more microgrid loads. A prediction is made as to when a main power grid may lose power. The microgrid controller operates in a prepare for islanding mode when a future loss of power is predicted, during which power received from the main power grid source, a solar power source and/or a wind power source are prioritized over energy costs and CO2 emissions to charge the battery power source to a prepare for islanding charge level. The microgrid controller operates in an islanding mode when the main power grid source loses power, during which power received from the solar power source, the wind power source, the battery power source and/or a diesel generator power source are prioritized to maximize a time that the microgrid can remain powered.

Abstract: The present application discloses a power supply system and an electronic device. A first power supply unit includes a plurality of voltage converters, each voltage converter being communicated with a corresponding load unit. A second power supply unit includes a plurality of voltage division components, each voltage converter being connected to a corresponding next-level load unit by means of one voltage division component. A monitoring unit is used for acquiring state information of each load unit and transmitting the state information to a control unit. The control unit is separately connected to an electrical double-layer capacitor, the first power supply unit, and the second power supply unit, so as to control, when state information of a target load unit is abnormal, the voltage division component connected to the target load unit to be conducted, and supplement power for the target load unit by means of the electrical double-layer capacitor.

Abstract: A power supply equipment supplies power to a critical load and a non-critical load. The power supply equipment includes a plurality of power supplies coupled in parallel and a system controller. The system controller is coupled to the power supplies, and communicates with the power supplies to set a specific sequence. The system controller notifies the power supplies to adjust operating frequencies to be inconsistent according to the specific sequence.

Abstract: A photovoltaic inverter includes a conversion circuit, a collection circuit, and a controller. The collection circuit is configured to obtain a positive direct current bus voltage and a negative direct current bus voltage of the conversion circuit. The controller is configured to generate an even-order harmonic voltage regulation signal based on the positive direct current bus voltage and the negative direct current bus voltage of the conversion circuit and a phase of an output voltage of the photovoltaic inverter, generate a drive control signal based on the even-order harmonic voltage regulation signal, and control a switching transistor in the conversion circuit to be turned on or off to control the conversion circuit to output a target voltage and reduce a difference between the positive direct current bus voltage and the negative direct current bus voltage of the conversion circuit.

Abstract: A method of signaling between a photovoltaic module and an inverter module. The inverter module is connected to the photovoltaic module. In an initial mode of operation an initial code is modulated thereby producing an initial signal. The initial signal is transmitted from the inverter module to the photovoltaic module. The initial signal is received by the photovoltaic module. The operating mode is then changed to a normal mode of power conversion, and during the normal mode of operation a control signal is transmitted from the inverter to the photovoltaic module. A control code is demodulated and received from the control signal. The control code is compared with the initial code producing a comparison. The control command of the control signal is validated as a valid control command from the inverter module with the control command only acted upon when the comparison is a positive comparison.

Abstract: A high power (HP) generator includes a plurality of low power (LP) generators, a coupling in which the plurality of LP generators is electrically connected, and a control unit. During operation, a coupling-value at an output of the coupling is higher than an LP-generator-value at an output of one of the plurality of LP generators. The control unit is configured to select a contribution of each LP generator to an output value of the HP generator, in a way that one or a combination of following is accomplished: (i) the output of the coupling and/or the output of the HP generator is a step function, (ii) the plurality of LP generators is activated sequentially during a pulse, (iii) at least one amplitude step is lower than 1 kV, and (iv) the plurality of LP generators is connected by switching only.