A method and a device for power supply switching in an electric power system include providing an electric power system having two power supplies, each connected to a bus through an incoming line, using the power supply currently supplying power as the main power supply, using the other power supply as a backup power supply, and respectively connecting the two power supplies to a power supply station of a higher level. Upon identifying a trigger condition, sampling of power data on the bus is started, with the trigger condition being used to decide that a fault of the electric power system is eliminated and power is lost from the main power supply. If the time period for sampling of power data reaches a preset threshold, it is determined whether the condition for circuit-closing of the backup power supply is satisfied according to each sampled power data value.

A method of operating a power plant includes generating, with one or more power generators, a total plant power. The method further includes providing a first portion of the total plant power to one or more auxiliary devices to meet an auxiliary demand. The method further includes providing a second portion of the total plant power to a flexible firm skid disposed within the power plant to meet a flexible firm demand. The method further includes providing a third portion of the total plant power to a power grid outside of the power plant to meet a grid demand. The method further includes receiving an increase in the grid demand that exceeds a power ramp rate of the one or more power generators. The method further includes adjusting an operation of the flexible firm skid to modify the flexible firm demand in response to the increase in the grid demand.

An electrical plug connector (10) including a housing (12); at least one input-side contact (14, 16, 18); at least one output-side contact (20, 22, 24); and an electrical circuit (30) arranged inside the housing (12). The electrical circuit (30) has a sensor device (32), a control device (34) and a communication interface (38). The sensor device (32) is designed to detect an electrical operating parameter; and the control device (34) is designed to generate output data on the basis of the electrical operating parameter and to output said data by a communication interface (38). A method for operating a system having an electrical plug connector (10) is provided in which the plug connector (10) includes a sensor device (32) for detecting an electrical operating parameter.

An electrical plug connector (10) including a housing (12); at least one input-side contact (14, 16, 18); at least one output-side contact (20, 22, 24); and an electrical circuit (30) arranged inside the housing (12). The electrical circuit (30) has a sensor device (32), a control device (34) and a communication interface (38). The sensor device (32) is designed to detect an electrical operating parameter; and the control device (34) is designed to generate output data on the basis of the electrical operating parameter and to output said data by a communication interface (38). A method for operating a system having an electrical plug connector (10) is provided in which the plug connector (10) includes a sensor device (32) for detecting an electrical operating parameter.

A power management system includes power monitor circuits and a power manager circuit. The power monitor circuits each measure actual power supplied to one of the user electronic devices (UEDs). The power manager circuit negotiates with the UEDs agreement for subscription power levels that the UEDs are authorized to be supplied. The power manager circuit allows an oversubscription state by operations agreeing to subscription power levels for the UEDs that when combined exceeds a maximum power supply capability of the power management system. The power manager circuit, for each UED, determines a present actual power usage of the UED based on the measurements, determines a present total actual power usage of the UEDs, and responds to the present total actual power usage exceeding the maximum power supply capability minus a first threshold offset, by renegotiating an agreement with at least one of the UEDs for a lower subscription power level.

A computing system can communicatively couple to a first power converter unit and a second power converter unit. The computing system can monitor power conversion performance of the first power converter unit, compare the power conversion performance to predetermined performance metrics, and determine an operational status of the first power converter unit based on the comparison.

An electrical power socket including: an electrical power outlet; a power input configured to supply power to the power outlet; one relay configured to control delivery of electrical power via the power outlet; a power monitor configured to monitor the operational state of the-power outlet and characteristics of power drawn from the power outlet; and a microcontroller being configurable to: capture monitored data; send the captured data via a data network interface to a remote energy monitoring system; receive data from the remote energy monitoring system; and control the one relay to manage delivery of power via a power outlet responsive to a determination the power outlet is delivering power associated with a wasted energy usage classification. The determination the power outlet is delivering power associated with a wasted energy usage classification.

An electrical power socket including: an electrical power outlet; a power input configured to supply power to the power outlet; one relay configured to control delivery of electrical power via the power outlet; a power monitor configured to monitor the operational state of the-power outlet and characteristics of power drawn from the power outlet; and a microcontroller being configurable to: capture monitored data; send the captured data via a data network interface to a remote energy monitoring system; receive data from the remote energy monitoring system; and control the one relay to manage delivery of power via a power outlet responsive to a determination the power outlet is delivering power associated with a wasted energy usage classification. The determination the power outlet is delivering power associated with a wasted energy usage classification.

An islanding detection method includes: continuously detecting a voltage frequency at a point of common coupling; calculating, according to the voltage frequency, a frequency deviation of the voltage frequency between two adjacent detections; obtaining, when the frequency deviation is less than a preset frequency threshold, a voltage phase in a preset closed-loop phase-locking manner; obtaining, when the frequency deviation is greater than or equal to the preset frequency threshold, the voltage phase in a preset open-loop phase-locking manner; determining, according to the frequency deviation, the voltage frequency, and the voltage phase, a reference current for injecting a frequency perturbation; controlling, according to the reference current, the grid-connected inverter to output a current to the point of common coupling; and determining, when the voltage frequency exceeds a preset range, that an islanding effect occurs.

An externally-controllable electrical power generating system for providing auxiliary or backup power to a load bus or device. The system may be used indoors, and generally includes a power source comprising a first DC output, an electrical storage unit comprising a DC input coupled to the first DC output of the power source, the electrical storage unit further comprising a second DC output. An inverter coupled to the second DC output receives power, the inverter having a first AC output that can be synchronized with an AC load bus or AC grid. The system includes a contactor connected between the first AC output and an AC load bus, and is controllable with an external controller operated by a utility or a managing entity, such that the external controller can enable the controller to connect or disconnect the contactor.