A method and system are provided for transferring a load between a primary power source and a secondary power source. In accordance with the disclosure, a controller senses, via a sensor, an electrical signal providing power from the primary power source to the load. The controller also detects a non-conforming power event by determining that a parameter of the electrical signal is either more or less than a first threshold value. Responsive to the detection of the non-conforming power event, the controller determines a quantity of non-conforming power events that occur during a first time interval. The controller further can compares the determined quantity of non-conforming power events to a second threshold value. Responsive to the determined quantity of non-conforming power events being either greater or lesser than the second threshold value, the controller initiates a control signal, such as a control signal to initiate a load transfer.

A method and system are provided for transferring a load between a primary power source and a secondary power source. In accordance with the disclosure, a controller senses, via a sensor, an electrical signal providing power from the primary power source to the load. The controller also detects a non-conforming power event by determining that a parameter of the electrical signal is either more or less than a first threshold value. Responsive to the detection of the non-conforming power event, the controller determines a quantity of non-conforming power events that occur during a first time interval. The controller further can compares the determined quantity of non-conforming power events to a second threshold value. Responsive to the determined quantity of non-conforming power events being either greater or lesser than the second threshold value, the controller initiates a control signal, such as a control signal to initiate a load transfer.

The invention discloses a method for MGP new energy grid-connected control, wherein, the synchronous motor is connected to a synchronous generator; the new energy module drives the synchronous motor to rotate through a frequency converter; the frequency converter controls the power transmission; and the synchronous motor drives the synchronous generator for grid connection. The present invention has the beneficial effects that: the control method and system provided by the invention can improve the stability and reliability of the grid.

The invention discloses a method for MGP new energy grid-connected control, wherein, the synchronous motor is connected to a synchronous generator; the new energy module drives the synchronous motor to rotate through a frequency converter; the frequency converter controls the power transmission; and the synchronous motor drives the synchronous generator for grid connection. The present invention has the beneficial effects that: the control method and system provided by the invention can improve the stability and reliability of the grid.

The present disclosure provides curtailing photovoltaic (PV) power output and autonomous load breaking in a backup mode of an electrical system. The electrical system includes a PV system, an energy storage system having a storage converter, and an energy control system. The energy control system is electrically coupled to the PV system, the energy storage system, and a plurality of backup loads. The electrical system includes an autonomous load breaker electrically coupled to a first backup load. When the energy control system switches from an on-grid mode to the backup mode, the storage converter adjusts the frequency of the power supplied to the backup side of the energy control system to a setpoint frequency that curtails PV power output, and the autonomous load breaker electrically disconnects the first backup load from the energy control system.

A multi-port meter system supports islanding operations at a premises. A multi-port meter includes at least a load port, a grid port, an auxiliary port, and at least two switches, a grid switch and an auxiliary switch. The grid port connects the multi-port meter to the grid and the grid switch allows the multi-port meter to control the meter's connection to the grid. The auxiliary port connects the multi-port meter to an inverter, which is connected to a distributed energy resource device, and the auxiliary switch allows the multi-port meter to control the inverter's connection to the load associated with the premises and the grid. The transition to islanding mode may be based on determinations made at the meter, the inverter, a remote device, or by a user.

A system and method for synchronizing a utility grid and a microgrid including a diesel generator, a photovoltaic array and a wind turbine. In a grid connected mode, a microgrid voltage, a microgrid frequency and a microgrid phase angle are controlled by a grid side converter which generates a preset reference power at the utility grid frequency; and provides a real power and a reactive power to each of a plurality of loads. In an island mode, the diesel generator operates at a constant speed to generate power at the reference frequency and communicates the reference frequency to a wind turbine, and the microgrid supplies the real power and reactive power to each of the plurality of loads. In a resynchronization mode, a switched capacitor bank is charged to provide the voltage needed to reconnect the microgrid to the utility grid.

A system and method are provided for operating a power generating asset having a generator operably coupled to a power grid. The generator having a rotor and a stator. The stator being operably coupled to a transformer, and ultimately to the power grid, via a sync-switch assembly. The sync-switch assembly having a plurality of switching devices electrically coupled in parallel. Accordingly, a controller detects an approach of at least one operating parameter of the power generating asset to a first parameter threshold. In response to detecting the approach of the operating parameter to the first parameter threshold, the controller independently changes an operating state of a first switching device of the plurality of switching devices of the sync-switch assembly. Each switching device of the plurality of switching devices is independently controllable via the controller.

A system and method for paralleling generators is described. A timing signal indicative of a waveform reference point of at least a first generator of the generators is received at a second generator. The receiving generator determines a closing time for a second generator breaker associated with the second generator in response the timing signal from the first generator. The first generator breaker and the second generator breaker, or an aggregated generator breaker is closed to a bus at the closing time.

A system and method for paralleling generators is described. A timing signal indicative of a waveform reference point of at least a first generator of the generators is received at a second generator. The receiving generator determines a closing time for a second generator breaker associated with the second generator in response the timing signal from the first generator. The first generator breaker and the second generator breaker, or an aggregated generator breaker is closed to a bus at the closing time.