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Temperature and Physicochemical Properties of Abnormal Heating Composite Insulators
1Xuefeng Mountain Energy Equipment Safety National Observation and Research Station, Chongqing University, Chongqing 400044, China.
Polymers
|November 9, 2024
Summary
Composite insulator abnormal heating, exacerbated by high humidity, stems from material degradation. Understanding these temperature characteristics is crucial for preventing insulation failure and insulator fracture.
Area of Science:
- Electrical Engineering
- Materials Science
- Environmental Science
Background:
- Composite insulators are critical for power systems.
- Abnormal heating compromises insulation performance and can lead to insulator fracture.
- High humidity significantly worsens abnormal heating in composite insulators.
Purpose of the Study:
- To investigate the voltage withstand performance of composite insulators experiencing abnormal heating under varying humidity.
- To analyze the temperature characteristics and discharge behavior of composite insulators with aging sheath, decayed core rod, and contamination.
- To elucidate the underlying mechanisms of abnormal heating in composite insulators.
Main Methods:
- Conducted voltage withstand tests on composite insulators under different ambient humidity levels.
- Utilized infrared thermal and ultraviolet imagers to observe heating and discharge phenomena.
- Analyzed temperature characteristics (range, shape, difference) and material properties (micro-morphology, chemical groups, dielectric properties).
Main Results:
- Distinct temperature characteristics were observed for the three types of abnormal heating.
- The temperature difference of composite insulators increased with rising ambient humidity.
- Material deterioration (silicone rubber and core rod) was identified as the root cause of abnormal heating.
Conclusions:
- The study reveals unique temperature signatures for different composite insulator failure modes.
- High humidity acts as a significant exacerbating factor for abnormal heating.
- Material degradation is the intrinsic cause of abnormal heating, with humidity intensifying the effect, impacting insulation integrity.
Keywords:
abnormal heatingambient humiditycomposite insulatorsinsulator agingphysicochemical propertiesMore Related Videos
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