Composite Conductor Optical Fiber Sensing for Precise Sag Monitoring
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Solution Overview
Problem
Current methods for measuring sag, temperature, and strain in electrical conductors lack precision and are not economically viable for continuous monitoring, leading to inefficiencies in power transmission and safety hazards due to inaccurate assessment of conductor parameters.
Innovation Solution
Incorporating an optical fiber assembly within a composite conductor's core, which includes a sensing element to measure changes in optical properties in response to conductor parameters, allowing for real-time monitoring of sag and temperature using a single optical fiber end, and utilizing hybrid interrogation techniques for accurate distributed sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional sensing methods are used for conductor monitoring, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The optical fiber assembly is integrated directly into the composite conductor structure, merging the sensing function with the conductor itself. This eliminates separate sensing devices and reduces overall system complexity while enabling precise distributed measurements of temperature, strain, and sag along the conductor length.
Solution Approach 2:
The optical fiber assembly serves multiple sensing functions simultaneously - measuring temperature, strain, and sag - within a single integrated component. This multi-functionality reduces the need for multiple separate sensing systems, thereby reducing device complexity while maintaining high measurement precision across multiple parameters.
2Reliability
If continuous monitoring is implemented, then reliability is improved, but loss of energy increases
Solution Approach 1:
The optical fiber sensing system uses periodic pulsed laser signals rather than continuous illumination to interrogate the conductor parameters. This periodic action enables continuous monitoring capability while significantly reducing energy consumption compared to continuous sensing methods, thereby improving reliability without excessive energy loss.
3Loss of information
If multiple sensing parameters are measured, then information completeness is improved, but device complexity increases
Solution Approach 1:
The optical fiber assembly is designed to measure multiple conductor parameters - temperature, strain, and sag - simultaneously using a single integrated sensing mechanism. This multi-functional approach provides complete operating information without requiring multiple separate sensing devices, thereby avoiding increased device complexity.
Solution Approach 2:
Multiple sensing functions are merged into the single optical fiber assembly, allowing simultaneous measurement of temperature, strain, and sag through one integrated component. This consolidation provides comprehensive conductor information while reducing the overall complexity that would result from multiple separate sensing systems.
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
Enables precise real-time measurement of conductor sag and temperature with high fidelity, reducing operational costs and enhancing safety by providing proactive maintenance and optimizing power grid performance.
Implementation Method 1
a sensing element disposed within the fiber core at a pre-determined location along a length of the fiber core, the sensing element configured to exhibit a change in at least one of its optical properties in response to a change in a value of an operating parameter of the conductor
Implementation Method 2
an optical fiber assembly disposed in the core, the optical fiber assembly including a fiber core and a fiber encapsulation layer
Data Source
AI summary
A conductor includes a strength member including a core formed of a composite material. An encapsulation layer is disposed around the core. A groove may be defined in at least one of the core or the encapsulation layer. An optical fiber assembly is disposed in the groove, and includes a fiber core and a fiber encapsulation layer disposed therearound. A conductor layer is disposed around the strength member. A sensing element may be disposed within the fiber core at a pre-determined location along a length of the fiber core. A system may include a controller communicatively coupled to the optical fiber assembly to determine a value or change in a value of the operating parameter of the conductor. The system is configured to independently determine at least two different operating parameter of the conductor with high precision. A coupler may be coupled to an axial end of the conductor.