Composite-Core Tree Wire for Low Sag and Higher Ampacity
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Solution Overview
Problem
Conventional tree wires used to prevent wildfires from electrical power lines suffer from increased sag due to additional weight of the covering material, leading to reduced clearance with vegetation and increased likelihood of contact, despite improved wildfire resistance.
Innovation Solution
Replace the steel core of conventional tree wires with a carbon fiber composite core, maintaining or reducing sag while enhancing ampacity and wildfire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional tree wire with covering material is used to prevent wildfires, then wildfire resistance is improved, but sag increases due to additional weight
Solution Approach 1:
The patent replaces the traditional steel core with a carbon fiber reinforced polymer (CFRP) composite core. This composite material provides equivalent or superior mechanical strength while significantly reducing the core weight, thereby offsetting the weight added by the wildfire-resistant covering material and reducing overall sag.
Solution Approach 2:
The patent changes the material composition and density parameters of the core from traditional steel to carbon fiber reinforced polymer. This parameter change reduces the core density and weight, compensating for the covering material weight and improving the overall weight-to-strength ratio of the tree wire.
2Reliability
If conventional tree wire with covering material is used to prevent wildfires, then wildfire resistance is improved, but clearance to vegetation decreases due to increased sag
Solution Approach 1:
By using carbon fiber reinforced polymer composite core, the patent reduces the overall weight of the tree wire, thereby reducing sag and maintaining greater clearance to vegetation while preserving wildfire resistance through the covering material.
Solution Approach 2:
The lightweight carbon fiber composite core acts as a counterbalance to the weight of the wildfire-resistant covering material, offsetting its gravitational effect and reducing the net weight that causes sag, thus maintaining vegetation clearance.
3Use of energy by moving object
If steel core is replaced with carbon fiber composite core, then ampacity increases by 8-12%, but structural strength must be maintained
Solution Approach 1:
The carbon fiber reinforced polymer composite core provides both the necessary structural strength to maintain tension and span requirements, and the electrical properties to achieve 8-12% higher ampacity compared to traditional steel cores, resolving the contradiction between strength and energy capacity.
Solution Approach 2:
The patent changes the electrical and mechanical parameters of the core material from steel to carbon fiber reinforced polymer, achieving improved electrical conductivity for higher ampacity while maintaining or enhancing mechanical strength through the composite structure.
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
The carbon fiber composite core maintains or reduces sag, improving ampacity by 8-12% compared to ACSR tree wires, and increases the catenary constant, reducing the likelihood of contact with vegetation.
Implementation Method 1
When the steel core wire used in conventional tree wire is replaced with a carbon fiber composite core, the resulting sag is the same as or less than the sag seen with the original bare conductor
Implementation Method 2
the tree wire disclosed herein has an improved ampacity compared to a conventional ACSR tree wire
Data Source
AI summary
Disclosed herein is a tree wire and a method of preparing the same. The tree wire disclosed herein has an improved ampacity compared to a conventional ACSR tree wire, as well as reduced sag compared to a conventional ACSR bare conductor and/or ACSR tree wire.