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In the framework of elaborating a methodology for testing the resistance to electrical treeing of polyethylene (PE) for HVDC applications, electrical tree inception tests were performed before and after a thermal ageing on XLPE samples. For this purpose test objects of wire-plane electrode geometry were exposed to various voltage regimes. The obtained results show that a DC pre-stress followed by...
Exploitation and utilization of coal resources have polluted and damaged the ecological environment. It's time to control the coal mining and bring coal enterprises into the circular economy system that would realize the coal enterprises' sustainable development. Based on the theory of circular economy and cleaner production, we can construct a Coal Eco-Industrial Park, which has include a series...
With the aim of developing defect-based life models (i.e., life models were breakdown is explicitly associated with the partial discharge-induced growth from a defect beyond a critical level), measurements were carried out in the lab on XLPE sandwich test models containing artificial defects. During aging, PD activity was continuously monitored, while the test was stopped shortly at regular times...
The results of space charge measurements carried out on mini-cables having two kinds of cross-linked polyethylene (XLPE) materials are presented in this paper. One material is a classic XLPE homopolymer, the other is high productivity XLPE compound. Space charge measurements were performed on mini-cables at three different temperatures and two voltage levels in order to obtain information about charge...
The research work reported in this paper has the aim to contribute in the development of a new physical aging model for damage inception and growth from micro-cavities in polymeric insulating materials subjected to partial discharges (PD) under AC voltage. Aging tests were performed on polyethylene (PE) layered specimens with cylindrical microcavities. The PD activity taking place inside the micro-cavities...
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