Non-Contact Transmission Line Galloping Detection Method Utilizing Frequency and Phase Features of Tower-Side...

Area of Science:

• Electrical Engineering
• Physics

Background:

• Non-contact magnetic sensing is vital for transmission line monitoring (current measurement, fault location).
• Existing methods for detecting conductor galloping via magnetic sensing lack optimal sensor placement guidance and suffer from high false detection rates due to current fluctuations.

Purpose of the Study:

• To propose a novel transmission line galloping monitoring method utilizing spatial magnetic field distribution features.
• To address limitations of existing methods, specifically sensor placement and false detection under current fluctuations.

Main Methods:

• Established a conductor galloping-power frequency magnetic field coupling model to determine optimal magnetic sensor array arrangement.
• Developed a galloping detection algorithm integrating multi-node frequency-domain features and phase difference information to mitigate false detections.

Main Results:

• Simulations using 500 kV transmission line parameters and laboratory tests confirmed reliable galloping detection.
• The proposed method effectively distinguishes galloping from current oscillations and random fluctuations.

Conclusions:

• The novel method offers reliable transmission line galloping detection.
• It demonstrates non-contact deployment, high anti-interference, and accuracy, showing significant potential for high-voltage transmission line monitoring.