Title :
The electric field distribution in oil-cardboard composited insulation system under a Polarity reversed voltage
Author :
Wei, Xinlao ; Wang, Yonghong ; Chen, Qingguo
Author_Institution :
Key Lab. of Eng. Dielectrics & Its Applic., Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
Taken a composited insulation system of oil and cardboard filled in two parallel tabulate electrodes as research object, the electric field distribution in the composited insulation system, which is stressed by a polarity reversed voltage, has been studied. This is carried out by means of establish and solve a differential equation describing the field distribution. The main factors influencing the field distribution characteristics have also been studied. The research result shows that: Because of the polarized electric charges located on the interface of oil and cardboard, there is a long time electric field redistribution transition process in the oil and cardboard when a polarity reversed voltage acted across the composited insulation system, and an obviously increased electric field intensity may appears in oil during this transition process.
Keywords :
differential equations; power transformer insulation; differential equation; electric field intensity; electric field redistribution transition process; oil-cardboard composited insulation system; parallel tabulate electrodes; polarity reversed voltage; Dielectrics and electrical insulation; Electric breakdown; Electric fields; Insulation testing; Oil insulation; Petroleum; Power transformer insulation; Power transformers; System testing; Voltage; The Polarity reversed voltage; The composited insulation of oil and cardboard; The electric field distribution;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-4367-3
Electronic_ISBN :
978-1-4244-4368-0
DOI :
10.1109/ICPADM.2009.5252515
