Intelligent Early Warning System for Operation State of Transmission Line Key Clamp

Affected by natural and man-made factors, the contact resistance of some key wire clamps (strain clamp, wire connection tube, etc.) of transmission lines is too large, and there is a risk of overheating when encountering heavy load, and its temperature may exceed the safety limit. At this time, the wire clamp not only has the risk of burning loss, but also its mechanical strength will decrease, which seriously affects the safety of line operation.
The intelligent early warning system for the operation state of key line clamps of transmission lines is composed of temperature measuring sensors, concentrators and software background. By installing temperature measurement sensors at each key line clamp, installing concentrators nearby, and transmitting data to the software background through APN private network, temperature monitoring, temperature rise warning and defect location at key points such as transmission line clamps can be realized.
Through the early warning and fault trend prediction of the hidden dangers of transmission line clamps, we can take targeted measures in the early stage of accident development, timely maintenance, and prevent the accident from expanding, which is of great significance to the safe operation of the power grid.

■ Main functions
• Condition monitoring
The temperature of each key wire clamp is obtained in real time, and the historical temperature curve and temperature rise prediction curve are drawn.
• Defect warning
Based on the big data analysis algorithm, the intelligent identification of hot fault points and fault classification early warning are realized.
• Fault trend prediction
The temperature rise prediction curve is drawn for the defect point of serious thermal fault, and the safe operation time is evaluated.
• Load monitoring (optional)
Real-time monitoring of line running current.

Software background

■ Main technical indicators
1) Applicable to 110kV ~ 500kV voltage level transmission lines (towers);
2) The temperature measuring sensor has high communication stability, easy installation, maintenance-free, and service life ≥ 5 years;
3) A single concentrator supports up to 24 measuring points;
4) Wide working temperature range (-40 ℃ ~ 120 ℃), high protection level, can adapt to outdoor harsh weather conditions;
5) Temperature measurement range and accuracy:-50 ℃ ~ 150 ℃,± 2 ℃.