US 12,129,834 B2
Wind turbine auxiliary power system
Jose María Canales Segade, Durango (ES); Santiago Carneiro, Guipúzcoa (ES); Soeren Kirkeby, Holstebro (DK); Eduardo Miguel Garcia de Cortazar, Vitoria-Gasteiz (ES); Miguel Rodriguez Vazquez, Gorraiz (ES); and Fernando Santodomingo Llamas, Las Palmas de Gran Canaria (ES)
Assigned to Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
Appl. No. 18/031,177
Filed by Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
PCT Filed Oct. 12, 2021, PCT No. PCT/EP2021/078089
§ 371(c)(1), (2) Date Apr. 11, 2023,
PCT Pub. No. WO2022/089929, PCT Pub. Date May 5, 2022.
Claims priority of application No. 20382928 (EP), filed on Oct. 26, 2020.
Prior Publication US 2023/0374973 A1, Nov. 23, 2023
Int. Cl. F03D 9/25 (2016.01); H02J 3/38 (2006.01)
CPC F03D 9/257 (2017.02) [H02J 3/381 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wind turbine auxiliary power system configured to receive electrical power from an electrical power generating system of a wind turbine or from a power grid, the auxiliary power system comprising:
an auxiliary transformer having a primary side configured to be coupled to the electrical power generating system of the wind turbine and a secondary side configured to be coupled to auxiliary power consumers of the wind turbine and to provide transformed electrical power to the auxiliary power consumers; and
an electronic on-load tap changer provided on the auxiliary transformer, wherein the electronic on-load tap changer comprises taps on at least one transformer winding of the auxiliary transformer and semiconductor switches that are coupled to the taps and that are configured such that by controlling the semiconductor switches, a transformation ratio of the auxiliary transformer is adjustable to compensate for voltage variations on the primary side of the auxiliary transformer; and
wherein the auxiliary power system is configured to control the semiconductor switches to compensate for the voltage variations while the wind turbine is coupled to the power grid.