公开(公告)号：US20210151975A1

公开(公告)日：2021-05-20

申请号：US16627457

申请日：2018-06-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Arran WOOD ,  Stephen BUGGY ,  John BENGTSON

IPC: H02H3/08 ,  G01R31/327 ,  F03D17/00 ,  F03D80/40 ,  F03D7/02 ,  H02H3/04

Abstract: The present invention relates to a method of identifying an electrical contact fault in a wind turbine blade electrical heating system, comprising inserting a predetermined enforced off cycle between or within a switching duty cycle, wherein the switching duty cycle controls the switching of one or more electrical contacts in the electrical heating system, measuring a current consumption during the predetermined enforced off cycle, determining if the measured current consumption exceeds a predetermined threshold, and wherein if the measured current consumption exceeds the predetermined threshold shutting down at least part of the electrical heating system. The present invention also relates to a wind turbine with one or more wind turbine blades that can identify an electrical contact fault.

公开(公告)号：US20210148338A1

公开(公告)日：2021-05-20

申请号：US16627465

申请日：2018-06-21

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Arran WOOD ,  Stephen BUGGY ,  Paul BADGER

IPC: F03D80/60 ,  F03D17/00 ,  F03D80/40

Abstract: The present invention relates to a method of controlling an electro-thermal heating system in a wind turbine blade, comprising measuring a supply voltage to the electro-thermal heating system, determining a duration of a variable time based enforced off period based on the measured supply voltage, and inserting the variable time based enforced off period between subsequent switching duty cycles that controls the electro-thermal heating system. The present invention also relates to a wind turbine that comprises one or more wind turbine blades wherein each wind turbine blade comprises an electro-thermal heating system and a processor adapted to perform the method.

公开(公告)号：US20200149513A1

公开(公告)日：2020-05-14

申请号：US16627433

申请日：2018-06-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Luke SPANDLEY ,  Arran WOOD ,  Darren ROGERS

IPC: F03D80/40 ,  F03D1/06 ,  F03D80/60

Abstract: The present invention relates to an Electro-Thermal Heating element for a wind turbine blade comprising an electrically conductive resistive material; two active busbars for supplying electrical power to the electrically conductive resistive material; and at least one dummy busbar at a predetermined spacing between the two active busbars on the electrically conductive resistive material. The present invention is also directed to a method of repair of the Electro-Thermal Heating Element.