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The oil-paper insulation has been widely used in large power equipment, and thermal and electrical stresses are the two main origins causing the deterioration and failure of oilpaper insulation system. In this paper, accelerated aging experiments of oil impregnated paper are conducted and partial discharge (PD) measurement are performed under typical defect models, i.e. protrusion, surface discharge...
Silicone oil is a promising alternative insulating liquid especially for the sites where fireproofing and environment protection must be considered. In this paper, the chemical and dielectric performance of silicone oil-paper composite insulation system under thermal aging is discussed. Two kinds of oil-paper systems are tested: mineral oil and silicone oil (Shin-Etsu Chemical KF-96-20 Lower viscosity...
Excellent hydrophobicity and hydrophobicity migration property of silicone rubber material guarantee outstanding pollution resistance and insulation performance of composite insulators in outdoor insulation. Under effect of multiple environmental factors, insulators get aged with increase of service duration. In this paper, hydrophobicity recovery characteristics are revealed by static contact angle...
During the long-term operation of electrical equipment of HVDC system, accumulated space charge in oilpaper insulation can greatly distort the local electric field, which can cause the aging and breakdown of the equipment. Therefore, it is important to understand the influence of the space charge on breakdown characteristics of oil-paper insulation dielectrics under DC voltage. In this paper, four...
In audio measuring system, high-precision intermodulation distortion analysis is an important method of measuring distortion. research in the accuracy of convolution window in the audio measurement system intermodulation distortion analysis, and compare convolution window with a variety of classical windows function. The results show that with the same width, compared to other windows function when...
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