A Fiber Bragg Grating-Based Dynamic Tension Detection System for Overhead Transmission Line Galloping

Area of Science:

• Electrical Engineering
• Mechanical Engineering
• Materials Science

Background:

• Galloping of overhead transmission lines (OHTLs) poses risks like conductor breakage and tower collapse.
• Existing monitoring systems suffer from electromagnetic interference, onsite power requirements, and short lifespans.

Purpose of the Study:

• To introduce a novel optical remote passive measuring system for on-line OHTL galloping detection.
• To address limitations of conventional monitoring systems, enhancing long-distance distribution capabilities.

Main Methods:

• Development of an 'S' type elastic element structure with flanges to improve tension sensing and dynamic response range.
• Conducting tension experiments to evaluate dynamic response characteristics and long-term stability (30 min continuous stretching).
• Testing the sensor's dynamic performance on a 70 m conductor model oscillated at various frequencies.

Main Results:

• The proposed sensor demonstrates suitability for OHTL galloping detection.
• Experimental results validate the sensor's dynamic response and long-term stability.
• The system shows promise for effective OHTL galloping monitoring.

Conclusions:

• The novel optical remote passive system offers a superior alternative for OHTL galloping monitoring.
• Advantages include easy installation, no flashover risk, distributed monitoring, better bandwidth, improved accuracy, and higher reliability compared to conventional sensors.