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Stepped conductivity interface

A conductivity, stepped technology, applied in the field of stepped conductivity interface, wind turbine rotor blades, can solve problems such as catastrophic failure, and achieve the effect of reducing the possibility

Active Publication Date: 2019-12-24
SIEMENS GAMESA RENEWABLE ENERGY AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These types of damage can propagate and get worse under cyclic loading of the rotor blades such that catastrophic failure can eventually occur

Method used

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Examples

Experimental program
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Embodiment Construction

[0033] figure 1 A prior art connection between the first conductive part 1 and the second conductive part 2 is shown. The first conductive part 1 may be assumed to be a metal cable 1, which is part of the LPS of the wind turbine rotor blade, and the second conductive part 2 may be assumed to be a carbon pad 2, which is attached to a carbon-based structural element of the rotor blade or Carbon-based functional subsystems of a rotor blade. The graph in the center of the figure shows the conductivity (Y-axis, in S / m) of the metal cable 1 and the conductive pad 2 in the areas where these overlap (X-axis represents the distance along the overlapping area). Conductivity σ of metal cable 1 HI can be of the order of 1E7 to 5E7 S / m, and is therefore significantly higher than the conductivity σ of the weakly conductive carbon pad 2 LO , which may only be of the order of 5 to 3E4 S / m. The lower part of the figure shows the current I at this connection in case of a lightning strike to...

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Abstract

The invention describes a stepped conductivity arrangement (10) between a carbon-based element (60, 61) and a down conductor (62) of a wind turbine rotor blade (6), which stepped conductivity arrangement (10) comprises a transition interface (3) arranged to electrically connect a first electrically conductive part (1) and a second electrically conductive part (2), wherein the first electrically conductive part (1) extends from the down conductor (62), the second electrically conductive part (2) extends from the carbon-based element (60, 61), and wherein the electrical conductivity of the transition interface (3) decreases in the direction of the second electrically conductive part (2). The invention further describes a wind turbine rotor blade (6) comprising such a stepped conductivity arrangement (10) and a method of providing such a stepped conductivity arrangement (10) .

Description

technical field [0001] The present invention describes a stepped conductivity interface, a wind turbine rotor blade comprising such a stepped conductivity interface, and a method of providing such a stepped conductivity interface. Background technique [0002] The rotor blades of wind turbines are most at risk of receiving lightning strikes due to their exposed position. Therefore, it is crucial to properly design the lightning protection system (LPS) of a wind turbine to protect the rotor blades from damage caused by lightning strikes. This is usually done by routing a high voltage metal cable inside the blade as a lower conductor and connecting it to the grounding system of the LPS. Receivers at various points along the outside of the rotor blade are connected to the inner lower conductor, providing a safe current path to ground when a lightning strikes the rotor blade. [0003] Problems with such types of LPS arise when rotor blades are designed to incorporate weakly co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D80/30
CPCF03D80/30Y02E10/72F03D1/0675B32B2307/202B32B37/00
Inventor D.吉罗拉莫Y.C.范张
Owner SIEMENS GAMESA RENEWABLE ENERGY AS