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A pulsed electro-acoustic equipment system was devised to measure the space charge of a power cable under 50 Hz AC stress and a high temperature gradient by adopting a new phase-matching method. Space charge profiles were recorded on a 10 kV cable with cross-linked polyethylene insulation. The AC period was resolved in 32 phase angles, while the cable underwent electrical-thermal aging for 16 days...
The bad thermal-resistance of insulation cardboard in oil-immersed transformer can directly lead to the aging of the oilpaper insulation system and the subsequent poor performance of the oil-paper system, which would affect the reliability and stability of power system. In this paper, based on the home-made thermal aging test platform, the insulation cardboards have been aged under different aging...
Ozone is one of the byproducts when there is corona occurred in the air. In order to study the influence of corona on the aging of HTC silicone rubber, the TSC performance of HTV silicone rubber under ozone environment has been investigated in this paper. This paper mainly reported the influence of the different ozone aging time. The relationship between the TSC performance and the ozone aging time...
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