Opto-electric composite lightning protection cable and preparation method thereof

By matching the torsional stiffness of the inner and outer conductive layers and using the fiber braided layer buffer design in the optoelectronic composite lightning protection cable, the problem of fatigue failure of traditional lightning protection cables in wind turbine blades is solved, achieving long service life and reliability of the cable, and providing real-time monitoring and early warning functions.

CN122117525APending Publication Date: 2026-05-29CABLE MFG (SHANGHAI) CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CABLE MFG (SHANGHAI) CO LTD
Filing Date
2026-04-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional lightning protection cables used in wind turbine blades are difficult to use due to the flexibility of their materials, making it difficult to address fatigue failure under dynamic loads. Furthermore, they cannot monitor the operating status in real time, posing a risk of lightning strikes.

Method used

The design of the photoelectric composite lightning protection cable eliminates conductor fatigue damage by matching the torsional stiffness of the inner and outer conductive layers and the buffer structure of the fiber braided layer, and achieves fault early warning by combining fiber optic monitoring.

Benefits of technology

Significantly improves cable lifespan and reliability, enables real-time monitoring and early warning of wind turbine blade status, reduces fatigue damage risk, and ensures lightning discharge capacity and signal transmission stability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122117525A_ABST
    Figure CN122117525A_ABST
Patent Text Reader

Abstract

The application relates to a photoelectric composite lightning protection cable and a preparation method thereof, which comprises a fiber unit and a force bearing layer, a conductive layer and a protection layer which are sequentially wrapped outside the fiber unit from inside to outside; the fiber unit comprises at least one optical fiber and a loose sleeve, an aluminum-plastic composite belt, a corrugated steel belt and a first sheath layer which are sequentially wrapped outside the optical fiber from inside to outside, and the optical fiber is filled with optical fiber ointment between the optical fiber and the loose sleeve; the force bearing layer comprises a fiber woven layer woven by high molecular fiber and a second sheath layer wrapped outside the fiber woven layer; the conductive layer comprises an inner conductive layer and an outer conductive layer wrapped outside the inner conductive layer, the inner conductive layer and the outer conductive layer are both twisted by multiple copper conductors, the twisting directions of the inner conductive layer and the outer conductive layer are opposite, and the ratio of the torsional stiffness of the inner conductive layer to the torsional stiffness of the outer conductive layer is 0.9 to 1.1; and the protection layer comprises a third sheath layer.
Need to check novelty before this filing date? Find Prior Art