US 11,898,539 B2
Method for controlling a wind farm
Aramis Schwanka Trevisan, Aurich (DE); Angelo Mendonca, Wilhelmshaven (DE); and Jair Cassoli, Aurich (DE)
Assigned to Wobben Properties GmbH, Aurich (DE)
Appl. No. 17/258,111
Filed by Wobben Properties GmbH, Aurich (DE)
PCT Filed Jul. 5, 2019, PCT No. PCT/EP2019/068105
§ 371(c)(1), (2) Date Jan. 5, 2021,
PCT Pub. No. WO2020/008034, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. 10 2018 116 444.0 (DE), filed on Jul. 6, 2018.
Prior Publication US 2021/0285420 A1, Sep. 16, 2021
Int. Cl. F03D 7/00 (2006.01); F03D 7/04 (2006.01); F03D 7/02 (2006.01)
CPC F03D 7/048 (2013.01) [F03D 7/0284 (2013.01); F03D 7/045 (2013.01); H02J 2300/28 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A method for controlling a wind power system for feeding electrical power generated from wind into an electrical supply grid and for damping low-frequency oscillations in the electrical supply grid, wherein the electrical supply grid has a line voltage with a nominal line frequency, wherein low-frequency oscillations are frequency oscillations that are less than one half of the nominal line frequency, the method comprising:
performing, by a closed control circuit, damping control for damping the low-frequency oscillations, and
controlling, by the damping control, a feed-in of the electrical power into the electrical supply grid using a wind system controller, wherein the closed control circuit includes:
at least a portion of the electrical supply grid,
at least a portion of the wind power system, and
at least a portion of the wind system controller, and
wherein the damping control is configured to mitigate weakly-damped modes in the closed control circuit,
wherein the damping control includes modeling a network characteristic including oscillation properties, wherein modeling the network characteristic includes:
modeling a network that represents at least a portion of the electrical supply grid included in the closed control circuit and accounts for a structure of the at least the portion of the electrical supply grid and consumers and producers connected to the at least the portion of the electrical supply grid; and
modeling a wind system which represents a behavior of the wind power system, wherein modeling the wind system also includes a behavior of the wind system controller, and
wherein the method further comprises:
linearizing the modeled network characteristic to obtain a linearized network characteristic, wherein the linearizing is with respect to at least one working point, and
configuring the damping control based on the linearized network characteristic.