Study on dielectric surface discharge in transformer oil under high voltage nanosecond pulse |
| |
| Institution: | 1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, PR China;2. Department of Electrical Engineering, Tsinghua University, Beijing 100084, PR China;1. College of Electrical Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China;2. Department of Building Services Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;1. Ricerca Sul Sistema Energetico (RSE), Via Rubattino 50, 20134 Milano, Italy;2. CMIC Department “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;1. Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands;2. Ampelmann Operations, Kluyverweg 1, 2629 HS Delft, The Netherlands;3. Materials Innovation Institute (M2i), Elektronicaweg 25, 2628 XG Delft, The Netherlands;1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, 430074, China;2. Wenhua College, Wuhan, 430074, China |
| |
| Abstract: | Electrical equipments are always subjected to different operating conditions and voltage waves which cause electrical failure on the surface and in the bulk of dielectrics. In this paper, experiments have been carried out to study main factors that influence the characteristic of dielectric surface discharge in transformer oil. Experimental study on flashover of nylon 6 and polymethyl methacrylate (PMMA) under applied voltage ranged from 50 to 250 kV shows that the flashover voltage U is influenced by the insulation structure, rise velocity and pulse width of the applied voltage. Flashover electrical field value E in pulse with rise time less than 10 ns is higher than that in DC and AC voltages. When angle between electrode and the sample is about 45°, nylon 6 and PMMA show the best flashover performance. From these results, the influence of the secondary electron emission and space charges on the electrical breakdown of dielectrics has been stressed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
