The present disclosure relates to a recloser control that provides autosynchronization of a microgrid to an area electric power system (EPS). For example, a recloser control may include an output connector that is communicatively coupled to a recloser at a point of common coupling (PCC) between the area EPS and the microgrid. The recloser control may include a processor that acquires a first set of measurements indicating electrical characteristics of the area EPS and acquires a second set of measurements indicating electrical characteristics of the microgrid. The recloser control may send synchronization signals to one or more distributed energy resource (DER) controllers to synchronize one or more DERs to the area EPS based on the first set of measurements and the second set of measurements.

The present disclosure relates to a recloser control that provides autosynchronization of a microgrid to an area electric power system (EPS). For example, a recloser control may include an output connector that is communicatively coupled to a recloser at a point of common coupling (PCC) between the area EPS and the microgrid. The recloser control may include a processor that acquires a first set of measurements indicating electrical characteristics of the area EPS and acquires a second set of measurements indicating electrical characteristics of the microgrid. The recloser control may send synchronization signals to one or more distributed energy resource (DER) controllers to synchronize one or more DERs to the area EPS based on the first set of measurements and the second set of measurements.

A dual-mode combined control method for a multi-inverter system based on a double split transformer is provided. For an extremely-weak grid, the method provides the dual-mode combined control method for a multi-inverter system based on a double split transformer. According to the method, the equivalent grid impedance at a point of common coupling (PCC) of one grid-connected inverter (GCI) in the multi-inverter system based on the double split transformer is obtained with a grid impedance identification algorithm, and the system sequentially operates in a full current source mode, a hybrid mode, and a full voltage source mode according to a gradually increasing equivalent grid impedance, thereby effectively improving the stability of the multi-inverter system based on the double split transformer during variation of the strength of the grid. The method ensures that the system can still operate stably in the extremely-weak grid.

Various embodiments include a method for operating a control platform for energy exchanges between a plurality of energy systems. The method may include: receiving information related to an intended energy exchange from the energy systems; calculating optimum energy exchanges between the energy systems; receiving a plurality of possible energy exchanges s from at least one of the energy systems; for each of the received possible energy exchanges s, performing an optimization method, and therefore calculating an associated partial solution Z(ζ.sub.s); calculating the total solution from the plurality of partial solutions Z(ζ.sub.s) depending on their probability values ζ.sub.z; and controlling energy exchanges between the plurality of energy systems by the control platform on the basis of the determined total solution.

Various embodiments include a method for operating a control platform for energy exchanges between a plurality of energy systems. The method may include: receiving information related to an intended energy exchange from the energy systems; calculating optimum energy exchanges between the energy systems; receiving a plurality of possible energy exchanges s from at least one of the energy systems; for each of the received possible energy exchanges s, performing an optimization method, and therefore calculating an associated partial solution Z(ζ.sub.s); calculating the total solution from the plurality of partial solutions Z(ζ.sub.s) depending on their probability values ζ.sub.z; and controlling energy exchanges between the plurality of energy systems by the control platform on the basis of the determined total solution.

A method for exchanging electrical power between an infeed unit, in particular a wind power installation or a wind farm, and an electrical supply grid at a grid connection point is provided. The exchange comprises exchanging active and reactive power, and the exchange of the active power is controlled based on a frequency-dependent and voltage-dependent active power control function. The active power control function specifies an additional active power to be fed in based on a captured grid frequency and a captured grid voltage. The exchange of the reactive power is controlled based on a frequency-dependent and voltage-dependent reactive power control function, where the reactive power control function specifies an additional reactive power to be fed in based on the captured grid frequency and the captured grid voltage. The control functions are set based on at least one grid characteristic and/or at least one grid state of the grid.

A method may include obtaining irradiance data at a first time and a second time from sensors, determining whether one or more solar modules of a plurality of networked power plants will be covered by a shadow or shade at a third time based on the irradiance data, and generating, based on the determination, a power output prediction for each power plant of the networked power plants at the third time. The method may further include receiving power delivery profiles for first and second loads, adjusting a power output of one or more power plants of the networked power plants based at least in part on the power output prediction and the power delivery profiles for the first and second loads, and allocating a combined power output of the power plants to the first and second loads based on first and second load reliability thresholds.

Provided is a power converter capable of reducing cross current. The power converter 1 includes a phase controller 20 that calculate a phase angle reference value θm based on a difference between a commanded active power reference value Pe and an output active power P supplied to a distribution line 5, a voltage controller 10 that calculates a voltage reference values Vu, Vv, and Vw based on the phase angle reference value θm calculated by the phase controller 20, and a power conversion unit 52 that converts, based on the voltage reference values Vu, Vv, and Vw calculated by the voltage controller 10, an electric power supplied from a power supply source 60 into AC power and outputs it to the distribution line 5.

Provided is a power converter capable of reducing cross current. The power converter 1 includes a phase controller 20 that calculate a phase angle reference value θm based on a difference between a commanded active power reference value Pe and an output active power P supplied to a distribution line 5, a voltage controller 10 that calculates a voltage reference values Vu, Vv, and Vw based on the phase angle reference value θm calculated by the phase controller 20, and a power conversion unit 52 that converts, based on the voltage reference values Vu, Vv, and Vw calculated by the voltage controller 10, an electric power supplied from a power supply source 60 into AC power and outputs it to the distribution line 5.

An inverter (200) connected to an energy source (100) and configured to supply power to a load network (300) comprising at least one controllable load, said inverter (200) comprising a processor (201) adapted to control the at least one controllable load of the load network (300) is disclosed. The processor (201) comprising: a net load detector (201a) detects a net load of the load network (300); a power export analyzer (201b) determines an inverter power transfer of the inverter and a grid power transfer of a grid (400); characterized in that a power manager (201c) varies the power output of the inverter (200) and a power consumption of the at least one controllable load based on the inverter power transfer, the grid power transfer, an export condition violation and a derating state of the energy source (100).