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LIGHTNING AND OVERVOLTAGE PROTECTION SYSTEM IN WIND TURBINES

IP.com Disclosure Number: IPCOM000196654D
Publication Date: 2010-Jun-10
Document File: 5 page(s) / 59K

Publishing Venue

The IP.com Prior Art Database

Abstract

An internal protection system and method for protecting wind turbine rotor blades and airfoils from lightning and overvoltage is disclosed. The internal protection system provides a mesh or a foil inside the rotor blade or airfoil. Further, the mesh or foil can be paint doped with conductive and semi-conductive particles or conductive foil or semi-conductive foil. The paint doped mesh or foil provides shielding effects to the rotor blades and/or airfoils due to Faraday Effect. Therefore, external electromagnetic fields are attenuated and possible damages to the wind turbines and associated measuring equipment installed inside the rotor blade is reduced.

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RP13410

LIGHTNING AND OVERVOLTAGE PROTECTION SYSTEM IN WIND TURBINES

BRIEF ABSTRACT

    An internal protection system and method for protecting wind turbine rotor blades and airfoils from lightning and overvoltage is disclosed. The internal protection system provides a mesh or a foil inside the rotor blade or airfoil. Further, the mesh or foil can be paint doped with conductive and semi-conductive particles or conductive foil or semi-conductive foil. The paint doped mesh or foil provides shielding effects to the rotor blades and/or airfoils due to Faraday Effect. Therefore, external electromagnetic fields are attenuated and possible damages to the wind turbines and associated measuring equipment installed inside the rotor blade is reduced.

KEYWORDS

    Internal protection, lightning, overvoltage, rotor blade, airfoil, mesh, paint dope, conductive particle(s), external electromagnetic fields, faraday-effect principle, lightning protection zone, LPZ and semi-conductive particle(s).

DETAILED DESCRIPTION

    Various wind turbine manufacturers and/or aircraft manufacturers introduce appropriate and often costly equipment for obtaining measurements in the interior part of wind turbine rotor blades or airfoils. Typically, electronic equipment is installed against electromagnetic interference (EMI) in modern wind turbine rotor blades and aircraft airfoils. Such equipment is meant to perform functions such as operation of actuators, communication, and electric power energy distribution and measurement.

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RP13410

    With a rise in use of such electronic equipment, the need for protection systems also increases, especially to mitigate the destruction caused by induced electromagnetic fields and electric (capacitive) coupling. Destructive events, such as lightning discharges and electrostatic self-charging effects in wind turbine rotor blades and airfoils, result in severe damage to the associated equipment.

    Various conventional protection systems offer external lightning protection systems, especially for wind turbines. However, such external protection systems do not provide increased levels of protection of the associated or internal electronic equipment. Further, such conventional protection systems are not effective to mitigate the destructive effects that are caused by induced electromagnetic fields.

    Therefore, there exists a need in the art for a technique that provides increased levels of protection for the internally installed electronic equipment.

    The present invention discloses an internal protection system and method for protecting wind turbine rotor blades and airfoils from lightning and over voltage. The internal protection system...