A processor receives an indication of a fault from a first isolation device. The processor sends a first open command to a downstream isolation device downstream of the fault, identifies a tie-in isolation device, and identifies a line section without current monitoring positioned between the tie-in isolation device and the downstream isolation device. The line section has a plurality of line segments, each having a load rating. The processor receives incoming and exiting current measurements for the line section and estimates a first current load for each of the line segments in the line section based on the incoming and exiting current measurements and the load ratings. The processor selects an intermediate isolation device between the tie-in isolation device and the downstream isolation device based on the first current loads, sends a second open command to the intermediate isolation device, and sends a close command to the tie-in isolation device.

In one embodiment, a power system includes a power panel operable to distribute alternating current (AC) power and pulse power to a plurality of power outlets and having an AC circuit breaker and a pulse power circuit breaker, the pulse power comprising a sequence of pulses alternating between a low direct current (DC) voltage state and a high DC voltage state, a power inverter and converter coupled to the power panel through an AC power connection and a pulse power connection and including a DC power input for receiving DC power from a renewable energy source, an AC power input for receiving AC power, and a connection to an energy storage device, and a power controller in communication with the power inverter and converter and operable to balance power load and allocate power received at the DC power input and the AC power input to the power panel.

A control system and method for a group of interconnected feeders which enables fault location, isolation and service restoration without requiring each switch to have topology knowledge of devices in adjacent feeders. The method defines, for each switch, connectivity and X/Y directional information about its neighboring switches and propagates this information throughout each feeder. A leader device is also determined for each feeder. Information about topology of adjacent feeders is not needed by all devices. Only normally-open tie switches which define a boundary between two adjacent feeders have knowledge of the devices in both feeders. Switches which open during fault isolation automatically find open tie switches in a direction opposite the fault, and request service restoration downstream of the fault by providing power from an adjacent feeder. Leader devices ensure an overload condition is not created before initiating opening and closing operations of switches downstream of the fault.

Protection distribution devices including switches, disposed on a distribution grid, are individually provided with slave stations. The slave stations are connected to each other via communication lines and connected to a high-order server. Each slave station includes a failure symptom cause estimation circuitry to estimate a symptom cause for failure on the distribution grid on the basis of waveform data measured by a measurement circuitry which performs signal processing on waveform data of current or voltage detected by the protection distribution device, and a data transmitter/receiver to transmit an estimation result for the symptom cause for failure on the distribution grid obtained by the failure symptom cause estimation circuitry, to the server. The failure symptom cause is autonomously estimated through mutual communication among the slave stations.

Systems and methods to estimate trapped charge for a controlled automatic reclose are described herein. For example, an intelligent electronic device (IED) may calculate an analog amount of trapped charge of each phase of a power line based on voltage measurements of the power line. The IED may close a switching device of each phase at a time corresponding to a point-on-wave associated with the analog amount of trapped charge of the respective phase.

A system and method for protecting an electric power distribution system integrated with a hybrid machine-learning model includes a plurality of field protection systems, a plurality of electrical switching circuits, and a local area network. Data from each of the plurality of field protection systems that is connected to the electrical switching circuits that are configured for protecting the electric power distribution system, is transmitted to the cloud. The received data is processed to identify a change in patterns and compute an error related to the HMLM in comparison with the processed data. The HMLM that is implemented in the plurality of FPS is calibrated to minimize the error and send updates to develop a new decision making firmware thereby to control actuation of the plurality of the electrical switching circuits.

A menu selection technique is based on orientation of a companion module used in a flexible load management (FLM) system. The FLM system includes a load center that utilizes circuit breakers in combination with companion modules (i.e., intelligent controllers). Each companion module has a graphical display as well as a push button included on a face of the module as an input device used to display and input information including icons, buttons, controls, messages, status, menus or other desired text on a user interface (UI) to enable a user to configure and operate the companion module. The companion module also includes an accelerometer configured to detect a gravitational orientation (i.e., a first orientation and an opposite or upside-down orientation) and movement of the module and, in response, generate a signal that is translated to a corresponding change in orientation of the information displayed on the UI, particularly when the companion module inserted into the load center.

A remote load switching circuit breaker includes a primary contact; a secondary contact in series with the primary contact and coupled to a secondary contact driving circuit, where the secondary contact is switched on and off remotely by a user using a user device communicatively coupled to the remote load switching circuit breaker via wireless communications technologies; a shunt element structured to measure a shunt voltage drop and to tap power from a line side of the primary contact; a control circuit comprising a controller and a communication module, the controller including a firmware; and a power supply and sensing circuit structured to supply power to the control circuit and to sense various voltages, where the secondary contact is fully powered by the power supply and sensing circuit.

A microgrid control system includes: a first intelligent electronic device to detect an open/closed state of a switch coupling a microgrid and a higher-ordered system; a protection relay to disconnect a consumer from the microgrid when detecting a fault current; and a second intelligent electronic device including protection relay-controlling circuitry to apply, to the protection relay, a set value according to at least the open/closed state of the switch, wherein the protection relay detects the fault current using the set value applied by the second intelligent electronic device.

The present disclosure relates to systems and methods for processing a stream of messages in an electric power system (EPS). In one embodiment, a system may include a configuration subsystem to receive a plurality of criteria from an operator to identify a subset of the stream of messages for real-time processing. A receiver subsystem may identify the subset of the stream of messages based on at least one criterion from the plurality of criteria. A real-time processing subsystem may receive the subset of the stream of messages from the receiver subsystem, process the stream of messages within a fixed interval of a time of receipt, and update a value based on information in the processed stream of messages. A protective action subsystem may implement a protective action based on information in the processed stream of messages.