Analysis of Wind-Induced Vibrations on HVTL Conductors Using Wireless Sensors

Area of Science:

• Electrical Engineering
• Mechanical Engineering
• Materials Science

Background:

• High Voltage Transmission Lines (HVTLs) are critical for renewable energy delivery.
• Wind-induced vibrations pose significant fatigue risks to HVTL conductors and components.
• Condition-based maintenance and safety assessments require effective vibration monitoring.

Purpose of the Study:

• To develop and validate an innovative wireless monitoring system for HVTL conductor vibrations.
• To measure the fy_max parameter as a fatigue indicator for different wind-induced phenomena.
• To assess the conductors' strain level and identify specific vibration types.

Main Methods:

• Designed a wireless monitoring system integrating MEMS accelerometers and energy harvesting.
• Deployed the system for field testing on a Canadian transmission line.
• Analyzed collected data to identify wind-induced vibration phenomena and measure fy_max.

Main Results:

• Successfully identified vibrations caused by vortex shedding with a maximum fy_max of 50 m/s.
• Confirmed the absence of subspan oscillation and galloping during the field test.
• Demonstrated the system's capability to detect distinct wind-induced vibration events.

Conclusions:

• The novel wireless monitoring system effectively detects wind-induced vibrations in HVTL conductors.
• The fy_max parameter serves as a reliable indicator for assessing conductor strain and fatigue.
• This technology enables the development of software for calculating residual fatigue life, enhancing line safety and maintenance.