A method for controlling a generator of electrical energy connected to a grid connection point of an electrical supply grid, comprising the steps of: regularly feeding electrical reactive power and electrical active power into the electrical supply grid, the generator being operated at a first working point, at which the electrical generator generates electrical reactive power and electrical active power, first interrupting or changing the feeding of the electrical reactive power and/or the electrical active power into the electrical supply grid when there is, or it is indicated that there is, a disruption in the electrical supply grid or a disruption of the feed into the electrical supply grid, resuming the regular feeding of the electrical reactive power and/or electrical active power into the electrical supply grid, the generator performing the resumption at a second working point or being ramped up to the second working point, at which the electrical generator generates and feeds in electrical reactive power and/or electrical active power, and suppressing the resumption of the feeding of the electrical reactive power and/or the electrical active power into the electrical supply grid in such a way that the electrical generator ceases feeding the electrical reactive power and/or the electrical active power for a shut-off period if an interruption has recurred within a predetermined counting time interval, or suppressing the feeding of the electrical reactive power and/or the electrical active power into the electrical supply grid in such a way that the electrical generator ceases feeding the electrical reactive power and/or the electrical active power for a shut-off period if a change of the feed has recurred within a predetermined counting time interval.

A converter system and inverter system are disclosed with individual real and reactive power control for each phase of a poly-phase system. The converter system includes a controller, bidirectional single-phase inverters with AC sides coupled to an AC line filter and DC sides connected in parallel to a link capacitor coupled to DC/DC converters. Each inverter handles a separate AC phase. The controller controls the inverters and DC/DC converters so the current amplitude of each AC phase is independent, and the phase difference of each AC phase is independent. The inverters can be galvanically isolated between the DC and AC sides. The inverters can be non-isolated inverters having line and neutral connectors coupled to an isolated transformer winding, and the output windings of the transformer can be wired in a Wye configuration. The inverters can have local controllers.

A method for monitoring a three-phase electricity supply grid, wherein the electricity supply grid has a grid topology with spatially distributed grid nodes, and a plurality of the grid nodes are in the form of observation nodes at each of which at least one voltage is able to be acquired in terms of absolute value and phase, comprising the steps of acquiring in each case at least one node voltage at each observation node, such that a plurality of node voltages are acquired, wherein each node voltage is characterized by a node phase angle as phase angle of the node voltage, and each node phase angle describes a respective phase angle with respect to a reference phase angle of a voltage, such that a plurality of node phase angles distributed over the grid topology are present, ascertaining at least one phase angle relationship that in each case describes a relationship between at least two of the node phase angles distributed over the grid topology, and checking the electricity supply grid for a grid disturbance on the basis of the at least one phase angle relationship.

A method for monitoring a three-phase electricity supply grid, wherein the electricity supply grid has a grid topology with spatially distributed grid nodes, and a plurality of the grid nodes are in the form of observation nodes at each of which at least one voltage is able to be acquired in terms of absolute value and phase, comprising the steps of acquiring in each case at least one node voltage at each observation node, such that a plurality of node voltages are acquired, wherein each node voltage is characterized by a node phase angle as phase angle of the node voltage, and each node phase angle describes a respective phase angle with respect to a reference phase angle of a voltage, such that a plurality of node phase angles distributed over the grid topology are present, ascertaining at least one phase angle relationship that in each case describes a relationship between at least two of the node phase angles distributed over the grid topology, and checking the electricity supply grid for a grid disturbance on the basis of the at least one phase angle relationship.

An energy-sharing network includes a common bus; a plurality of nodes each electrically connected to the common bus, each node including at least one of a load, a storage device, and a generating capacity and an electric meter electrically connected between the node and the common bus, each electric meter configured to measure an electrical property passed between the common bus and the node over a predesignated time period in a transfer. Each node also includes a local controller in communication with the node's electric meter, wherein the local controllers are in communication and are configured to compare the transfers of the electrical property.

A method for optimizing the energy supply from a variable electrical energy source in an electrical facility, operating in a self-consumption mode, connected to an electrical energy distribution network. A control device is configured to control an electrical energy inverter in an electrical facility and to an electrical facility including a control device for controlling an electrical energy inverter.

According to some embodiments, system and method are provided comprising calculating an output power setpoint for a thermal generation system for a first calculation cycle of a time window having at least one calculation cycle; calculating a net demand for dispatchable power to satisfy a required load demand after calculating an available renewable power generation; determining, responsive to determining that the net demand for dispatchable power exceeds the output power setpoint for the thermal generation system, whether a discharge power of an energy storage device satisfies a power gap; generating, responsive to determining that the discharge power is not larger than a power rating, a discharge command to discharge the energy storage device at the discharge power; and increasing, responsive to determining that the discharge of the energy storage device fails to satisfy the power gap, the output power setpoint for the thermal generation system for the first calculation cycle.

The present invention provides a power control method, device and system for a wind power station. The power control method comprises: obtaining running state data of the wind power station and a grid connection point in real time; determining whether the state of the grid connection point meets conditions of secondary frequency modulation according to the running state data; if it is determined that the state of the grid connection point meets the conditions of secondary frequency modulation, determining a limited power instruction value according to a pre-obtained theoretical power value of the wind power station, a given value of automatic power generation control, and a standby active power value reserved for primary frequency modulation; and generating and sending an instruction used for controlling the active power of the wind generating set of the wind power station according to the limited power instruction value.

The present invention provides a power control method, device and system for a wind power station. The power control method comprises: obtaining running state data of the wind power station and a grid connection point in real time; determining whether the state of the grid connection point meets conditions of secondary frequency modulation according to the running state data; if it is determined that the state of the grid connection point meets the conditions of secondary frequency modulation, determining a limited power instruction value according to a pre-obtained theoretical power value of the wind power station, a given value of automatic power generation control, and a standby active power value reserved for primary frequency modulation; and generating and sending an instruction used for controlling the active power of the wind generating set of the wind power station according to the limited power instruction value.

A hybrid power system (100) comprising a wind turbine (102) having a wind turbine generator and a power converter, and one or more DC power sources (104). The hybrid power system is configured to prioritize active power output over reactive power capability when the wind turbine is not operating, and is further configured to prioritize reactive power capability over active power output when the wind turbine is operating and wind speed is above a predetermined threshold. Methods for operating a hybrid power system are also provided.