Patent ID: 9088150
Filing Date: 2015-07-21
Classification: H02H,H02P

Abstract:
1. An overvoltage clipping device for clipping an overvoltage occurring at a main transformer of a wind turbine, the overvoltage clipping device comprising: a detection unit for detecting an actual voltage level at the main transformer; a determination unit operatively connected to the detection unit for determining whether the detected actual voltage level is above a predetermined reference voltage level; and, at least one switching unit operatively connected to the determination unit for electrically coupling at least two transformer terminals of the main transformer to create a high current flow through the main transformer if the detected actual voltage level is above the predetermined reference voltage level, wherein the at least one switching unit comprises: wherein one transformer terminal of the at least two transformer terminals is coupled to the switching element and another transformer terminal of the at least two transformer terminals is coupled to the inductance element.