The present invention relates to a method for controlling a wind power plant, the wind power plant comprising a plurality of wind turbine generators, each wind turbine generator comprising at least one power converter for providing active power and/or reactive power to an electrical grid, wherein the method is determining a required amount of reactive power provided by the plurality of wind turbine generators, and grouping the plurality of wind turbine generators into a first set of wind turbine generators and a second set of wind turbine generators based on a demand for reactive power; and supplying reactive power to the grid (20) from the first set of wind turbine generators and disconnecting the second set of wind turbine generators from the electrical grid (20) in response to a control demand, in order to minimize active power losses. The present invention also relates to a wind power plant arranged to perform the method.

The invention relates to a method for controlling power generation from a power plant which comprises power generating units such as wind turbine generators. The power generating units are controllable to produce power dependent on individual power set-points. The method comprises steps of obtaining desired target power set-points for one or more prioritized power generating units, determining final target power set-points for the one or more prioritized power generating units based on the target power set-points and an available power adjustment margin of the power plant which is available for adjustment of the power set-points of the one or more prioritized power generating units, and dispatching the final target power set-points to the prioritized power generating units.

A system and method for operating a wind farm connected to a power grid, the wind farm having one or more wind turbines includes implementing a shutdown mode for the one or more wind turbines of the wind farm in response to receiving a shutdown command. The shutdown mode includes disconnecting the one or more wind turbines of the wind farm from the power grid via one or more respective individual turbine controllers and reducing, via the individual turbine controllers, a rotor speed of the one or more wind turbines to a cut-in speed. After the shutdown command is cleared, the method further includes reconnecting the one or more wind turbines to the power grid.

A method of charging an energy storage system, such as a battery, a capacitor, or a super capacitor, using a wind turbine is described. The method comprises establishing if turbine power production can be increased and establishing if the energy storage system is capable of taking a charge. If both conditions are met, the power generated by the wind turbine is increased above a rated power of the wind turbine and the additional power is used to charge the energy storage systems. A method of control is also disclosed.

A method and a control device for adjusting active power of a wind farm, and a controller of a wind farm are provided. The method includes: acquiring an active power increment to be adjusted in the wind farm; determining an active power adjustable amount of the wind farm based on active power adjustable amounts of wind turbines in the wind farm; and determining an active power adjustment amount of each of the wind turbines based on the active power increment to be adjusted in the wind farm and the active power adjustable amount of the wind farm, to adjust active power of each of the wind turbines.

The invention relates to a method for wind turbine generators for reducing electrical disturbances in the form of power variations which are caused by damping controllers arranged the compensate structural oscillations by inducing shaft torque variations. The shaft torque variations are generated by imposing corresponding variations in a generator set-point, e.g. a power or torque set-point. Variations in the generator set-point cause undesired variations in the power injected to the grid by one or more wind turbine generators. According to an embodiment of the invention the electrical disturbances may be reduced by limiting a damping controller's control action. The amount of limitation or restriction of the damping controller may be determined on basis on electrical disturbance information determined from power measured e.g. at a location on the grid.

Systems, methods, and computer program products for providing an inertial response by a wind power system to power fluctuations in an electrical grid. The system includes a synthetic inertial response generator configured to generate a power offset in response to fluctuations in grid voltage. The power offset signal is generated by determining a quadrature component the grid voltage using an internal reference voltage having an angular frequency and phase angle that is synchronized to the electrical grid by a control loop. The quadrature component is used to determine a synchronous power level. A control loop error signal is produced by the difference between the synchronous power level and the wind turbine system power output. Changes in the grid frequency produce an error signal that is added to the power set point of wind turbine system output controllers to provide a power system inertial power output response.

The present invention relates to a method for releasing a requested amount of power from a power facility to an associated power grid, the method comprising the steps of providing a release signal as to when the requested amount of power is to be released from the power facility to the associated power grid, ramping up the power generation of the power facility, and releasing the requested amount of power to the associated power grid in accordance with the release signal, wherein at least part of an excess power generated during ramping up is dissipated and/or stored in suitable power handling modules. The present invention also relates to a power facility controller being capable for performing this method.

Provided is a method for detecting a power loss when operating a wind power system including a wind power installation and which feeds electrical power into a grid. The electrical power is fed into the grid with an active and reactive power component at a current operating point. The method includes detecting an overall power loss caused by feeding in the electrical power at the current operating point, and estimating a reactive power loss caused by feeding in the reactive power component at the current operating point. The reactive power loss is determined from a difference between the overall power loss and an active power loss assigned to the current operating point. The active power loss corresponds to a power loss of a comparison operating point where the same amount of active power is fed in as at the current operating point, but no reactive power is fed in.

The present invention relates to a method for controlling airborne wind energy systems (AWES), e.g. with kites, in a wind energy park connected to an electrical grid. By appropriately controlling these AWES to produce electrical power to the electrical grid by alternating between a power production phase and a recovery phase by cable control or changing kite aerodynamics, it is possible to better balance the supply of the net power production to the electrical grid. In this way, the invention may stabilize the electrical grid and can have a grid forming capability. Furthermore, the wind energy park may stabilize the grid during a fault ride-through (FRT) event.