Controlling Wind Turbines in Presence of Wake Interactions

Content Provider	The Lens
Abstract	It is described a method for controlling at least one considered wind turbine (5) in a wind park (1), comprising: determining, based on a wind condition (7b), in particular wind direction (7b), whether another wind turbine (9a, ...,9e) is in a wake region caused by the considered wind turbine; if another wind turbine (9b) is the closest wind turbine in the wake region (11b) and if the other wind turbine (9b) is in an operable state, applying a first control setting (15) to the considered wind turbine (5); if the other wind turbine (0b) is in a non-operable state applying a second control setting (17) to the considered wind turbine (5), wherein the first control setting is based on wind park level optimisation and the second control setting is based on wind turbine level optimisation.
Related Links	https://www.lens.org/lens/patent/010-064-665-138-246/frontpage
Language	English
Publisher Date	2019-12-11
Access Restriction	Open
Alternative Title	Steuerung Von Windturbinen in Gegenwart Von Nachlaufwechselwirkungen Commande D'éoliennes En Présence D'interactions De Sillage
Content Type	Text
Resource Type	Patent
Date Applied	2018-06-08
Agent	Aspacher, Karl-georg
Applicant	Siemens Gamesa Renewable Energy As
Application No.	18176703
Claim	Method for controlling at least one considered wind turbine (5) in a wind park (1), comprising: determining, based on a wind condition (7b), in particular wind direction (7b), whether another wind turbine (9a, ...,9e) is in a wake region caused by the considered wind turbine (5); if the other wind turbine (9b) is the closest wind turbine in the wake region (11b) and if the other wind turbine (9b) is in an operable state, applying a first control setting (15) to the considered wind turbine (5); if the other wind turbine (9b) is the closest wind turbine and the other wind turbine (9b) is in a non-operable state applying a second control setting (17) to the considered wind turbine (5), wherein the first control setting is based on wind park level optimisation and the second control setting is based on wind turbine level optimisation. Method according to the preceding claim, wherein the first control setting has previously been determined for the given wind condition to optimize a first target function for the entire wind park based on a simulation model assuming that all wind turbines are operable, wherein the second control setting has been previously determined for the given wind condition to optimize a second target function for only the considered wind turbine (5), in particular disregarding all other wind turbines and/or wherein the other wind turbine (9b) is in the operable state, if the other wind turbine (9b) is producing electrical power or at least could produce electrical power, if the wind condition was appropriate, and/or wherein the other wind turbine (9b) is in the non-operable state, if the other wind turbine (9b) is stopped, in particular due to an error or due to maintenance. Method according to one of the preceding claims, wherein the determining whether the other wind turbine (9b) is in the wake region (11b) comprises: utilizing a previously determined wind direction specific association (21) of several other wind turbines (9a, ..., 9e) to the considered wind turbine (5), which association designates one (9b) of the several other wind turbines (9a, ..., 9e) to be in the wake region (11b) of the considered wind turbine (5) depending on the wind direction (7b). Method according to the preceding claim, wherein the association (21) defines for each of the several other wind turbines (9a, ..., 9e) a wind direction angle sector (23a, ...,23e) for which the respective other wind turbine is considered to be in the wake region, wherein in particular, the other wind turbine is considered to be in the wake region (11b), if the other wind turbine (9b) is located, depending on the wind direction (7b), in a region downstream the considered wind turbine (5) having a width of the diameter (d) of the blades of the considered wind turbine (5), the width (w) expanding downstream the considered wind turbine (5) by an angle (α) of between 2° and 6° on both sides, in particular and if a distance (1) between the considered wind turbine (5) and the other wind turbine is closer than threshold (lmax). Method according to one of the preceding claims, wherein the first and second target function both comprise power output and/or load, of the entire wind park and the considered wind turbine, respectively. Method according to one of the preceding claims, wherein the first and/or the second control setting (15, 17) comprises at least one set point of at least one parameter selected from: a rotor yaw angle, a rotor yaw offset, a rotor tilt angle, a rotational speed, an active power output, a reactive power output, at least one blade pitch angle, an active current, a reactive current. Method according to the preceding claim, wherein the first and the second control setting (15, 17) are different in at least one set point of at least one parameter, in particular different in a set point for the yaw offset. Method according to one of the preceding claims, wherein the second control setting (17) comprises the set point of the yaw offset to be essentially zero, wherein the first control setting (15) comprises the set point of the yaw offset to be different from zero. Method according to one of the preceding claims, wherein the first control setting (15) comprises the set point of blade pitch angle to be greater than the set point of the blade pitch angle of the second control setting (17). Method according to one of the preceding claims, wherein the second control setting (17) is based on at least one set point of rotational speed, pitch angle, yaw angle, a wind speed, each being selected for maximal power production of the considered wind turbine (5). Method according to one of the preceding claims, further comprising: determining an operational state of the other wind turbine; communicating the operational state to the considered wind turbine (5), in particular via a park controller; in particular further comprising: determining the wind condition, in particular wind direction. Method according to one of the preceding claims, further comprising: applying a wake model to the entire wind park determined previously to derive the first control setting. Method for controlling wind turbines in a wind park, comprising: performing for each wind turbine of the wind park (1) a method according the one of the preceding claims as considered wind turbine. Arrangement (3) for controlling at least one considered wind turbine (5) in a wind park (1), the arrangement being adapted: to determine, based on a wind condition (7b), whether another wind turbine (9b) is in a wake region (11b) caused by the considered wind turbine (5); to apply a first control setting (15) to the considered wind turbine (5), if the other wind turbine (9b) is the closest wind turbine in the wake region (11b) and if the other wind turbine (9b) is in an operable state, to apply a second control setting (17) to the considered wind turbine (5), if the other wind turbine (9b) is in a non-operable state, wherein the first control setting is based on wind park level optimisation and the second control setting is based on wind turbine level optimisation. Wind park (1) comprising an arrangement (3) according to the preceding claim.
CPC Classification	WIND MOTORS Reduction Of Greenhouse Gas [Ghg] Emissions; Related To Energy Generation; Transmission Or Distribution INDEXING SCHEME RELATING TO WIND; SPRING; WEIGHT; INERTIA OR LIKE MOTORS; TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B; F03D AND F03G
Extended Family	198-066-293-921-332 024-752-637-917-987 057-713-482-675-033 179-635-589-513-387 010-064-665-138-246 131-786-954-701-973 115-278-100-623-43X 152-241-067-372-757 186-024-783-443-475 037-246-348-348-175
Patent ID	3578808
Inventor/Author	Gebraad Pieter M O
IPC	F03D7/04 F03D7/02
Status	Discontinued
Simple Family	198-066-293-921-332 024-752-637-917-987 057-713-482-675-033 179-635-589-513-387 010-064-665-138-246 131-786-954-701-973 115-278-100-623-43X 152-241-067-372-757 186-024-783-443-475 037-246-348-348-175
CPC (with Group)	F03D7/0264 F03D7/028 Y02E10/72 F03D7/049 F03D7/0224 F03D7/0284 F03D7/048 F05B2270/32 F05B2270/321 F05B2270/328 F05B2270/329 F05B2270/331 F05B2270/335
Issuing Authority	United States Patent and Trademark Office (USPTO)
Kind	Patent Application Publication