Abstract: Power systems, such as transmission systems, may comprise a series capacitor bank (SCB) to provide series compensation on a power line. The SCB may be electrically inserted into the power line or bypassed according to commands sent by remote systems. Such commands may be compromised in a cyberattack to cause deteriorated conditions and instability in the power system. Thus, according to an embodiment, a protection layer is provided in an SCB station to intercept commands prior to execution, assess the consistency of the commands with a physical state of the power system, and either allow or block the commands based on the assessment, to thereby protect the SCB from cyberattacks.

Abstract: A thermal-power power electronic direct-hung energy-storage plant backup power system includes a thermal-power grid connection startup/standby unit, a power electronic energy-storage switching unit and a thermal-power plant unit. The thermal-power grid connection startup/standby unit is connected to the power electronic energy-storage switching unit and the thermal-power plant unit, respectively. The power electronic energy-storage switching unit is connected to the thermal-power plant unit.

Abstract: A power system of a vessel includes a first AC bus; a second AC bus; a bus tie that electrically disconnects the first AC bus and the second AC bus when in an open position; a first power source and a first set of one or more non-propulsion components of the vessel that are electrically connected to the first AC bus; a second power source and a second set of one or more non-propulsion components of the vessel that are electrically connected to the second AC bus; a DC bus; a first transformer that galvanically isolates the DC bus from the first AC bus; a second transformer that galvanically isolates the DC bus from the second AC bus; a first AC/DC inverter coupled between the first AC bus and the DC bus; and a second AC/DC inverter coupled between the second AC bus and the DC bus.

Abstract: Provided is a method in an electricity-driven apparatus to be driven by receiving power through a plurality of battery packs in a parallel type. The method includes detecting a state of charge (SOC) of each of the plurality of battery packs, calculating a voltage difference between the plurality of battery packs based on the detected SOC, and performing battery pack balancing based on the calculated voltage difference exceeding a threshold value. The battery pack balancing is performed by a pre-charging circuit including a balancing relay.

Abstract: The systems and methods herein described isolating a circuit breaker panel for a building from a grid circuit during an event disrupting the grid circuit. In one aspect, an interrupt switch system comprises a housing configured to mate with an electric meter socket on a first side and an electric meter on a second side, the housing comprising power inputs from grid power and power outputs to a circuit breaker panel and an interrupt circuit disposed within the housing and configured to interrupt a flow of electricity from the power inputs to the power outputs.

Abstract: A system for controlling a direct current bus voltage includes a controller and an inverter. The controller is configured to: obtain a power grid voltage; obtain a maximum sampling value of a direct current bus voltage of the inverter when the power grid voltage jumps, where the maximum sampling value of the direct current bus voltage is a maximum voltage value on the direct current bus in a time period for detecting a power grid voltage jump; obtain a first direct current bus voltage reference value based on the maximum sampling value of the direct current bus voltage; and obtain a second direct current bus voltage reference value based on the first direct current bus voltage reference value and a preset first rising gradient value, to limit a rising rate of the direct current bus voltage.

Abstract: A method for controlling an active harmonic filter of an inverter-based resource includes receiving, via a maximum compensation tracker module, a grid feedback signal, determining, via the maximum compensation tracker module, a phase shift signal based, at least in part, on the grid feedback signal, applying, via the maximum compensation tracker module, a phase shift offset signal to the phase shift signal to obtain a modified phase shift signal, determining, via the maximum compensation tracker module, a voltage reference signal for the active harmonic filter based, at least in part, on the grid feedback signal and the modified phase shift signal; and controlling, via the maximum compensation tracker module, the active harmonic filter using the voltage reference signal, wherein the phase shift offset signal ensures that the active harmonic filter injects a current substantially out of phase of a targeted harmonic.

Abstract: The present disclosure provides a photovoltaic (PV) disconnect device used in an electrical system. The PV disconnect device includes a relay component electrically coupled to a feed circuit of a backup PV power generation system and a connector port electrically coupled to an energy control system. The PV disconnect device includes a sensor circuit to measure at least one of a voltage, a current, and a current frequency of the feed circuit of the backup PV power generation system. The PV disconnect device includes a controller operatively coupled to the relay component, the sensor circuit, and the connector port. The controller receives and processes the voltage, the current, and the current frequency measurements. The controller selectively actuates the relay component based on the processed voltage, current, and current frequency measurements.

Abstract: A power control device for controlling a power supply system, the power control device including a DCDC converter for supplying power of a battery to a load, and an alternator connected in parallel with a DCDC converter for supplying generated power to the load, the power control device including: a monitoring unit for monitoring a current output from DCDC converter to the load; and a control unit for controlling an operation of DCDC converter and the alternator, wherein the control unit controls the alternator to generate electric power when an output current of DCDC converter monitored by the monitoring unit is equal to or greater than a first threshold value, and controls the alternator not to generate electric power when an output current of DCDC converter monitored by the monitoring unit is equal to or less than a second threshold value, which is smaller than the first threshold value.

Abstract: A crowdsourced energy system includes a plurality of distributed energy resources managed by crowdsourcees of the system, a power network to which the distributed energy resources are connected, and a system operator that manages energy trading transactions and energy delivery within the system, the system operator operating at least one computing device configured to: obtain day-ahead peer-to-peer energy trading transaction requests from crowdsourcees for energy to be delivered from the distributed energy resources, estimate day-ahead energy load and solar forecasts, determine optimal power flow for the delivery of energy, and schedule delivery of energy from the distributed energy resources across the power network based upon the energy trading transaction requests, the estimated forecasts, and the determined optimal power flow.

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 cells that form a local grid, 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, an estimator tool for storage system sizing and photovoltaic sizing, and at least one of a configurable single-phase AC coupled battery and three-phase AC coupled battery profiles to optimize at least one of self-consumption or time-of-use or troubleshooting capabilities to identify and fix issues with the energy management system.

Abstract: A power conversion device includes a power converter connected to a power storage element, and a control device. The control device includes a generator simulating unit to generate a voltage command value, and a signal generating unit to generate a control signal for the power converter based on the voltage command value. The generator simulating unit includes a first characteristics simulating unit to generate a first command value by simulating characteristics of a first synchronous generator, a second characteristics simulating unit to generate a second command value by simulating characteristics of a second synchronous generator different from the characteristics of the first synchronous generator, an adder to perform addition of the first command value and the second command value, and a voltage command generating unit to generate the voltage command value, based on an addition result of the first command value and the second command value.

Abstract: A power management circuit and system thereof are provided. The power management circuit includes M×N computing units, a first power supply unit, a second power supply unit and N?1 connection interfaces. M and N are both natural numbers greater than 1. The first power supply unit supplies power to the computing units of the Nth row, the computing units of the Nth row supply power to the computing units of the (N?1)th row, respectively, and correspondingly to computing units of subsequent rows until the computing units of the 2nd row supply power to the computing units of the 1st row, respectively. The second power supply unit supplies power to the M×N computing units, and the N?1 connection interfaces coupled to corresponding computing units of the 1st column of the M×N computing units, respectively.

Abstract: An auxiliary power supply device includes a storage circuit having first and second electrical double layer capacitors connected in series between first and second nodes, a first switch element having a first terminal coupled to the first node, and a second terminal, a first discharging resistor provided between the second terminal and a fourth node, a second discharging resistor provided between the fourth node and ground, a second switch element having a third terminal coupled to a third node between the first and second electrical double layer capacitors, and a fourth terminal coupled to the fourth node, and a measurement controller. The measurement controller performs a procedure to compute a capacitance value of the storage circuit as a first process, and a procedure to connect the first switch element and connect the second switch element as a second process.

Abstract: A method of delivering power to a load coupled to an energy module includes determining a power to be produced in a load, generating a signal, and selecting a first or second power amplifier circuit based on the power to be produced in the load. The power rating of the amplifier circuits is different. Another method includes generating a digital waveform having a predetermined wave shape and frequency, converting the digital waveform to an analog waveform, selecting a first power amplifier circuit or a second power amplifier circuit based on a predetermined power output to be produced by the first or second power amplifier circuit into a load coupled to an energy output port of the energy module, coupling the analog waveform to the selected first or second power amplifier circuit, and producing the predetermined power output into the load.

Abstract: A power transmitter (101) comprises a driver (201) generating a drive signal for an output resonance circuit comprising transmitter coil (103) generating a power transfer signal. A resonance detector (307) determines a coupled resonance frequency for the output resonance circuit during where the coupled resonance frequency is a resonance frequency for the output resonance circuit for the transmitter coil (103) being coupled to a receiver coil (107) which is part of a power transfer input resonance circuit of the power receiver (105). The input resonance circuit has a quality factor of no less than ten. An estimation circuit (309) determines a coupling factor estimate for the coupling between the transmitter coil (103) and the receiver coil (107) in response to a non-coupled resonance frequency of the output resonance circuit and the first effective resonance frequency. An adapter (311) sets an operating parameter in response to the coupling factor estimate.

Abstract: An object of the present invention is to enable two or more power supply units constituting a power supply system to be synchronized to stably operate the power supply system.

Abstract: A vehicle power supply system, mounted on a vehicle including an internal combustion engine, includes: a main power supply system including a main low-voltage power supply; and a backup power supply system including a backup low-voltage power supply. A starter motor that starts the internal combustion engine is connected to the main power supply system. At least one of a vehicle control device, configured to control the main power supply system, the backup power supply system, the internal combustion engine and the starter motor, and a backup power supply control device of the backup power supply system is configured to execute an abnormality determination processing of determining whether an abnormality occurs in the main power supply system, and does not execute the abnormality determination processing when the starter motor is in operation, or determines that no abnormality occurs in the main power supply system in the abnormality determination processing.

Abstract: A vehicle includes a secondary battery, a heater configured to be able to raise a temperature of the secondary battery, and a charging control unit configured to be connectable to an external power source. The charging control unit is configured to be able to output electric power supplied from the external power source to the secondary battery and the heater when connected to the external power source. The charging control unit is configured to be able to request the external power source for a requested power amount, and to be able to receive a supply of a supplied power amount in accordance with the requested power amount from the external power source. The charging control unit requests the external power source for the requested power amount including a first power amount required for charging the secondary battery and a second power amount required for heating by the heater.

Abstract: A smart energy manager for an electrified vehicle is provided. In one exemplary implementation, the smart energy manager includes a control unit, a vehicle-to-control unit power cable assembly, a vehicle-to-vehicle power cable assembly, an A/C charge power cable assembly and an offboard power panel A/C sourcing cable assembly. The control unit has a control unit housing including a user interface panel. The vehicle-to-control unit power cable assembly has a first end electrically coupled to the control unit and a second end having a first charge connector configured to electrically couple to a charging port of the electrified vehicle. The control unit is configured to selectively and alternatively route power based on an input at the user interface panel indicative of an operational mode relative to the electrified vehicle and a second charge connector; an A/C plug or a power panel.