Wind Turbine Blade Cable Loop for Lightning Conductivity Checks
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Solution Overview
Problem
Existing wind turbine blade lightning protection systems require costly and complex external connections for conductivity measurements, necessitating skilled technicians and disrupting production, while drone-assisted inspections are similarly expensive and equipment-intensive.
Innovation Solution
A wind turbine blade with an inwardly continuous cable arrangement that measures conductivity, featuring an upper and lower portion extending from the root to the tip, connected at the root with an external connector, allowing for accurate conductivity measurement without external wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external wire connections are used for conductivity measurement, then measurement capability is achieved, but production downtime and operational complexity increase
Solution Approach 1:
The cable arrangement is pre-installed within the blade structure during manufacturing, with the upper and lower portions positioned to form an electrical loop before the blade is delivered to the site. This preliminary preparation eliminates the need for time-consuming on-site wire installation and complex external connections during maintenance operations.
Solution Approach 2:
The patent introduces an intermediary cable arrangement embedded within the blade that acts as a mediator between the conductivity measurement system and the blade structure. This internal cable loop serves as a dedicated measurement pathway, eliminating the need for external wires and complex connection equipment during inspections.
2Measurement precision
If external wire connections are used for conductivity measurement, then measurement capability is achieved, but the number of qualified technicians required increases
Solution Approach 1:
The blade structure itself provides the measurement capability through the embedded cable arrangement. The upper and lower portions of the cable form a self-contained electrical loop that is automatically connected to the blade's conductive path, eliminating the need for skilled technicians to perform complex external wiring and connection operations.
3Measurement precision
If external wire connections are used for conductivity measurement, then measurement capability is achieved, but equipment complexity and cost increase
Solution Approach 1:
The patent merges the conductivity measurement function with the blade's structural and protective systems. The cable arrangement is integrated into the blade's internal structure, combining the measurement pathway with the blade's existing architecture rather than adding separate external wiring systems and complex measurement equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates cost-effective and efficient conductivity measurement during maintenance, reducing downtime and technical expertise requirements.
Implementation Method 1
the cable arrangement comprises an upper portion and a lower portion extending there between the blade root and the blade tip, said lower portion electrically in contact with the upper portion closing an electrical loop thereof
Data Source
AI summary
A blade includes inwardly a continuous cable arrangement intended to measure conductivity for blade lightning protection, wherein the cable arrangement includes an upper portion and a lower portion extending therebetween the blade root and the blade tip, the lower portion electrically in contact with the upper portion closing an electrical loop, and wherein the blade further includes an electrical connector element located at the blade root and electrically in contact with the upper portion and the lower portion, the electrical connector element protruding exteriorly on the blade root so that conductivity of the blade is measured.