Abstract: An objective of the present invention is to provide a power supply system which enables stabilization of power supply voltages of multiple areas and/or redundancy to be achieved with low costs. A power supply system includes a main battery for providing power and a sub-battery which is separate from the main battery and provides power. The power supply system further includes switching boxes in first to fourth areas as a plurality of power supply areas configured to be supplied with power from the main battery and sub-battery, the switching boxes switching on/off states of power supplies into the first to fourth areas from the main battery and from the sub-battery. Furthermore, the power supply system includes a control section for switching control of the on/off states for the switching boxes.

Abstract: A method for controlling a renewable energy generator, the renewable energy generator being connected to a Point of Interconnection of an external power grid by a connecting network, wherein the connecting network has an associated impedance level. The method comprising: monitoring at least one parameter of the connecting network and the voltage level at the Point of Interconnection; generating, during normal operating conditions, at least one current injection profile based upon the at least one measured parameter and a predetermined injection profile; and operating the renewable energy generator, during a grid fault, to output current according to the at least one current injection profile, so as to achieve a current set point at the Point of Interconnection.

Abstract: A wireless power transmission device, and a transmission power control method therefor are provided. A wireless power transmission device for wirelessly transmitting power to a wireless power receiving device can comprise: a primary core comprising at least one primary coil and transmitting a power signal to the wireless power receiving device by being coupled, through magnetic induction or magnetic resonance, to a secondary core provided at the wireless power receiving device; an inverter connected to the primary core so as to apply an alternating voltage necessary for transmitting the power signal; and a controller connected to the inverter, and controlling a direct voltage to be applied to the wireless power transmission device and/or a gate voltage of the inverter on the basis of the information on the power received at the wireless power receiving device by the power signal.

Abstract: Systems and methods for synchronizing subunits a multi-unit power distribution network contemplate selectively opening and closing a switch at the power source to disconnect and reconnect the power source to power conductors to send a synchronization signal to one or more remote subunits. Once the remote subunits are synchronized and able to disconnect from the power conductors, leak detection at the power source may be enabled to detect inadvertent loads on the power conductors (e.g., a human touching the power conductors). Further, the remote subunits may power off and on based on the synchronization signal thereby ensuring that an end device may receive power concurrently from multiple remote subunits so as to meet the power requirements of the end device. Enabling the leak detection improves the safety features of the power distribution network and synchronized power delivery to the end device prevents improper shut downs.

Abstract: A carriers synchronizing method of a hybrid frequency parallel inverter is proposed. A low-frequency ripple simulating step is performed to drive a high-frequency controlling unit to simulate a low-frequency ripple. An equidistant grid sampling step is performed to drive the high-frequency controlling unit to sample a sample ripple to generate a sample group and sample the low-frequency ripple to generate a plurality of low-frequency reference groups. An actual shifting angle searching step is performed to drive the high-frequency controlling unit to compare the sample group with the low-frequency reference groups to search an actual shifting angle from the reference shifting angles. A high-frequency carrier adjusting step is performed to drive a proportional integral controller to calculate the actual shifting angle to generate a sync reference, and then a period counter adjusts a starting point of the high-frequency carrier according to the sync reference.

Abstract: An apparatus includes a rectifier coupled to a coil of a wireless power transfer system, the rectifier comprising a first leg and a second leg, wherein the first leg comprises a first switch and a second switch connected in series between a first voltage bus and a second voltage bus, and the second leg comprise a third switch and a fourth switch connected in series between the first voltage bus and the second voltage bus, and wherein a gate drive signal of the first switch is derived from a signal in phase with a voltage on a first terminal of the coil, and a gate drive signal of the third switch is derived from a signal in phase with a voltage on a second terminal of the coil.

Abstract: A power system for an electrical system with highly fluctuating loads is powered by one or more power sources that are slow to react to load changes. The power sources are connected to electrical equipment used on the drill rig which provide active load to the generate. One or more load banks may be positioned to provide passive load to the generators to maintain generally constant generator load, while allowing for instant access to power as active load increases. Generators may be run at 100% capacity, a maximum efficient capacity, or at a high enough level to allow for a sufficiently rapid increase in power output. At least one parameter of a drilling operation may be utilized to anticipate load demand changes.

Abstract: A storage system configured for use with an energy management system is provided and includes a single-phase AC coupled battery or a three-phase AC coupled battery, a plurality of microinverters that are configured to connect to one or more battery cell core pack that form a local grid, and a controller configured to detect when to charge or discharge the single-phase AC coupled battery or the three-phase AC coupled battery so that energy can be stored therein when energy is abundant and used when energy is scarce.

Abstract: A fault detection apparatus includes a temperature detection unit, a current detection unit, a controller, and a breaking unit. The temperature detection unit is configured to detect temperatures of the plurality of filter capacitors and output the temperatures to the controller. The current detection unit is coupled to the plurality of filter capacitors and is configured to detect currents of the plurality of filter capacitors and output the currents to the controller. The controller is separately connected to the temperature detection unit, the current detection unit, and the breaking unit, and is configured to: when the received temperature exceeds a first threshold and the received current exceeds a second threshold, control the breaking unit to be disconnected. The breaking unit is connected between the output end of the grid-tied inverter and the plurality of filter capacitors and is configured to be disconnected or connected under control of the controller.

Abstract: An adaptive system for efficient and long-range wireless power delivery using magnetically coupled resonators responds to changes in a dynamic environment, and maintains high efficiency over a narrow or fixed frequency range. The system uses adaptive impedance matching to maintain high efficiency. The wireless power transfer system includes a drive inductor coupled to a high-Q transmitter coil, and a load inductor coupled to a high-Q receiver coil. The transmitter coil and receiver coil for a magnetically coupled resonator. A first matching network is (i) operably coupled to the drive inductor and configured to selectively adjust the impedance between the drive inductor and the transmitter coil, or (ii) is operably coupled to the load inductor and configured to selectively adjust the impedance between the load inductor and the receiver coil.

Abstract: Apparatus and methods for managing power at a wellsite. An example apparatus may include a well construction equipment operable to construct a well at the wellsite, a power supply system operable to output electrical power to the well construction equipment to facilitate operation of the well construction equipment, and a control system for controlling the well construction system. The control system may be operable to store a digital drilling program and cause the well construction equipment to perform planned well construction operations based on the digital drilling program. The digital drilling program may include an equipment operational plan indicative of the planned well construction operations to be performed by the well construction equipment to construct the well, and an electrical power plan indicative of a planned electrical power demand of the well construction equipment to perform the planned well construction operations.

Abstract: The present disclosure provides a photovoltaic (PV) disconnect device used in an electrical system. The electrical system includes an energy control system electrically coupled to a utility grid. The electrical system includes a PV power generation system electrically coupled to the energy control system. The electrical system includes an energy storage system electrically coupled to the energy control system. The PV disconnect device is electrically coupled to the PV power generation system and the energy control system. The PV disconnect device electrically disconnects the PV power generation system from the energy control system.

Abstract: A system includes a first power stage circuit having a first PWM input, a first voltage input and a first power output. The first power stage circuit is configured to provide a first current at the first power output responsive to a PWM signal at the first PWM input, and configured to receive a voltage at the first voltage input. The system includes a second power stage circuit having a second PWM input, a second voltage input and a second power output. The second voltage input is coupled to the first voltage input, and the second power stage circuit is configured to provide a second current at the second power output responsive to the PWM signal at the second PWM input. The second power stage circuit is configured to receive the voltage at the second voltage input, the voltage representing an average of the first current and the second current.

Abstract: An automatic transfer switch (100) for automatically switching an electrical load between two power sources is provided. Two power cords (106) enter the ATS (A power and B power inputs) and one cord (109) exits the ATS (power out to the load). The ATS has indicators (107) located beneath a clear crenelated plastic lens (108) that also acts as the air inlets. The ATS (100) also has a communication portal (103) and a small push-button (104) used for inputting some local control commands directly to the ATS (100). The ATS (100) can be mounted on a DIN rail at a rack and avoids occupying rack shelves.

Abstract: An electric propulsion system includes at least one generator. The electric propulsion system also includes at least one drive engine coupled to the at least one generator. The electric propulsion system further includes at least one electrical device. The electric propulsion system also includes at least one battery integrated isolated power converter (BIIC), where the at least one generator and at least one of the at least one BIIC and the at least one electrical device are coupled, and where the at least one BIIC and the at least one electrical device are coupled.

Abstract: A control module controls impedance injection units (IIUs) to form multiple connection configurations in sequence. Each connection configuration has one IIU, or multiple IIUs in series, parallel or combination of series and parallel. The connection configurations of IIUs are coupled to a high-voltage transmission line. The control module and the IIUs generate rectangular impedance injection waveforms. When the waveforms are combined and injected to the high-voltage transmission line, this produces a pseudo-sinusoidal waveform.

Abstract: Techniques for controlling a power distribution network are provided. An electronic processor receives, a fault indication associated with a fault from a first isolation device of a plurality of isolation devices. The processor identifies a first subset of a plurality of phases associated with the fault indication and a second subset of the plurality of phases not associated with the fault indication. The processor identifies a downstream isolation device downstream of the fault. The processor sends send a first open command to the downstream isolation device for each phase in the first subset. The processor sends a close command to a tie-in isolation device for each of the plurality of phases. The processor sends a second open command to the downstream isolation device for each phase in the second subset. Responsive to identifying a potential loop configuration, the processor sends the second open command prior to the close command.

Abstract: The disclosed technology relates to wireless communication and wireless power transmission. In some implementations, the disclosed technology is directed to an integrated circuit having a transmitter that transmits radio frequency (RF) based wireless power and receives signals for detecting the location of a client device. The disclosed technology is also directed to an integrated circuit for a client device that receives power from the transmitter and transmits beacon signals, which the transmitter can use to locate the client device.

Abstract: A wireless power transfer system includes a transmitter configured to transmit power to a receiver, for example, through coupled resonators. The transmitter receives feedback from the receiver, and uses the feedback to control the power transmission, to control a parameter at the receiver, for example, a rectified voltage output by the receiver. The feedback to the transmitter may be provided, for example, by an out-of-band radio system between the transmitter and receiver, by a reflection coefficient at the transmitter, and/or by an encoded modulation of power in the receiver, for example, in an impedance matching module. The transmitter may control the transmitted power, for example, by controlling a transmitter signal generator voltage (VSIG), a transmitter gate driver voltage (VGD), a transmitter amplifier voltage (VPA), and/or an impedance setting in a transmitter impedance matching module.

Abstract: A power receiving apparatus controls a power receiving unit to receive a first power from the power transmitting apparatus without performing a determination process of determining whether or not the power transmitting apparatus meets a predetermined condition in a case where the power receiving apparatus is in a first operation state. The power receiving apparatus performs the determination process of determining whether or not the power transmitting apparatus meets the predetermined condition before the power receiving unit receives a second power higher than the first power from the power transmitting apparatus in a case where the power receiving apparatus is in a second operation state. The power receiving apparatus controls the power receiving unit to receive the second power from the power transmitting apparatus in a case where the power receiving apparatus is in the second operation state and the power transmitting apparatus meets the predetermined condition.